JP2023055370A - Machine tool - Google Patents

Abstract

To provide a machine tool which can reduce an influence of vibration of a plurality of processing modules arranged on a same base.SOLUTION: A machine tool comprises: a base; a first module which is arranged on the base, configured to be slidable in a slide direction with respect to the base and executes processing on a workpiece; a second module which is arranged on the base, configured to be slidable in the slide direction with respect to the base, arranged in parallel to the first module and executes processing on the workpiece; and a connection member which connects the first module with the second module. The first module includes a first device cover that covers at least a portion of a first processing space. The second module includes a second device cover that covers at least a portion of a second processing space. The connection member holds connection between a portion of the first device cover and a portion of the second device cover.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to technology for suppressing vibrations generated in machine tools.

For example, Patent Literature 1 below describes a production line in which a plurality of production apparatuses are arranged in a row along the line. Each production apparatus includes a split base having a frame structure installed on the floor, and a machine main body and the like detachably fixed on the split base. Two adjacent split bases are connected to each other by connecting means. The connecting means has bosses fixed to each split base. Each boss is formed with a ramp and is fitted with a threaded coupling that engages the ramp. Two adjacent split bases are connected to each other by tightening bolts inserted through connecting devices with screw holes.

JP 2006-68894 A (Fig. 4, paragraph 0073)

In the production line of Patent Literature 1 described above, a plurality of machine main bodies are arranged on bases that are connected by connecting means. When a plurality of processing devices for processing workpieces are arranged on such an integrated base, vibration of any processing device may affect processing of the device itself or other processing devices. be. For example, there is a risk that the surface roughness of a machined surface machined by an arbitrary machining apparatus will become uneven or deteriorate due to the influence of vibrations of the adjacent machining apparatus.

The present disclosure has been made in view of the above problems, and an object thereof is to provide a machine tool that can reduce the influence of vibrations caused by a plurality of machining modules arranged on the same base.

In order to solve the above-mentioned problems, the present specification provides a base, a first module arranged on the base and configured to be slidable in a sliding direction with respect to the base to perform machining on a workpiece, a second module arranged on a base, configured to be slidable in the sliding direction with respect to the base, arranged side by side with the first module, and performing machining on the workpiece; A connecting member that connects the second modules, wherein the first module includes a first processing device that performs processing on the work, and a first processing space that performs processing on the work by the first processing device. and a first device cover that covers at least part of the second module, the second module includes a second processing device that performs processing on the work, and a second processing device that performs processing on the work by the second processing device. a second device cover that covers at least a portion of the machining space, wherein the connection member connects and holds a portion of the first device cover and a portion of the second device cover. disclose.

According to the machine tool of the present disclosure, for the first and second modules arranged on the same base, the first and second device covers covering the machining space of each module are connected by the connecting member. The first and second device covers vibrate due to the machining operations of the first and second machining devices. Since the first and second processing devices are connected through the base, mutual vibrations are transmitted through the base and affect processing. Therefore, in the machine tool of the present disclosure, a connecting member is used to connect a part of the first and second device covers in addition to the base. Thereby, the vibration generated in each of the first and second device covers is transmitted via the connecting member. By intentionally transmitting the vibrations generated in the first and second device covers, it is possible to reduce or cancel the vibrations generated in the first and second device covers, the first and second processing devices, and the like. .

The front view of the machine tool concerning a present Example, and the partially enlarged view which expanded the connection member. The perspective view which looked at the machine tool from the right front, and the partially enlarged view which expanded the connection member. The top view of a machine tool, and the partially enlarged view which expanded the connection member. FIG. 3 is a view showing a state where a part of the first device cover of the first module shown in FIG. 2 is removed; Left side view of the machine tool. FIG. 2 is a perspective view of a work conveying/removing device; The perspective view which looked at the 1st apparatus cover from the downward direction of the right rear. FIG. 3 is an exploded perspective view of a connecting member; FIG. 4 is a plan view of the first and second device covers; FIG. 10 is a plan view showing how the position of the center of gravity changes between a state in which the connecting member is not mounted and a state in which the connecting member is mounted;

An embodiment embodying the machine tool of the present disclosure will be described below with reference to the drawings. 1, 2, and 3 respectively show a front view, a perspective view, and a plan view of the machine tool 10 of this embodiment as seen from the front right front. 4 shows a state in which a part of the first device cover 36 of the first module 12 shown in FIG. 2 is removed. As shown in FIGS. 1 to 4, machine tool 10 includes base 11 , first module 12 and second module 13 . 1, 2, and 4 omit illustration of a part of the device, such as an exterior cover covering the front surface of the base 11 and a work conveying/removing device 68 shown in FIG. 6, which will be described later. In the following description, as shown in FIGS. 1 and 2, the machine tool 10 is viewed from the front, and the machine width direction of the machine tool 10 is the left-right direction, parallel to the installation surface of the machine tool 10. The direction perpendicular to the left-right direction is referred to as the front-rear direction, and the left-right direction and the direction perpendicular to the front-rear direction are referred to as the up-down direction. The front-rear direction is an example of the sliding direction of the present disclosure. Also, the horizontal direction is an example of the direction in which the first and second modules are arranged.

The base 11 is longer in the front-rear direction than in the left-right direction, has a predetermined thickness in the up-down direction, and has a substantially rectangular parallelepiped shape as a whole. The base 11 is connected to, for example, other bases (not shown) arranged in the left-right direction to form a production line extending in the left-right direction. Two pairs of rails 21 (four in total) are provided on the upper portion of the base 11 . The pair of rails 21 are arranged side by side in the left-right direction and arranged parallel to each other along the front-rear direction. Of the two sets of rails 21 , the right set of rails 21 supports the first module 12 and the left set of rails 21 supports the second module 13 .

The two sets of rails 21 have the same configuration. Also, the first and second modules 12 and 13 have the same configuration. Therefore, in the following description, the first module 12 and the right set of rails 21 (supporting the first module 12) will be mainly described, and the second module 13 and the left set of rails 21 will be described as appropriate. omitted. The first module 12 has a first bed 31 , a first column 32 , a first machining center 33 , a first control panel 35 and a first device cover 36 . FIG. 5 shows a left side view of the machine tool 10. As shown in FIG. As shown in FIG. 5, the second module 13 includes a second bed 41, a second column 42, a second machining center 43, a second control panel 45, and a second device cover 46, similar to the first module 12. there is

As shown in FIGS. 1 to 4, the first bed 31 is a thick plate-like member provided at the lower end of the first module 12. As shown in FIG. Of the two sets of rails 21, the right set of rails 21 is arranged with a predetermined gap therebetween in the left-right direction. This predetermined gap is substantially the same as the width of the first bed 31 in the left-right direction. A plurality of wheels 37 are attached to the first bed 31 . The first bed 31 has a plurality of wheels 37 rotatably attached to a pair of rails 21 and is slidable in the front-rear direction while supporting the entire first module 12 . Thereby, the first module 12 is slidable in the front-rear direction with respect to the base 11 . Similarly, the second module 13 has the second bed 41 attached to the rails 21 via wheels 47 (see FIG. 5) and is slidable in the front-rear direction with respect to the base 11 . For example, when the user accesses the first processing space 39 (see FIG. 4) of the first module 12, the user pulls out the first module 12 forward to perform the work. Also, the user can replace the first module 12 with another module by, for example, pushing the first module 12 backward and removing it from the base 11 .

The first and second modules 12 and 13 are arranged on the base 11, arranged side by side in the horizontal direction, and positioned close to each other. The gap width 15 (see enlarged view in FIG. 1) between the first and second modules 12, 13 is, for example, 5 mm. Therefore, the first and second modules 12 and 13 are arranged with almost no gap in the horizontal direction. The first module 12 has a generally rectangular parallelepiped shape, and the dimension in the left-right direction (hereinafter sometimes referred to as module width) is much smaller than the dimension in the front-rear direction (hereinafter sometimes referred to as module length). ing. The base 11 has a horizontal dimension substantially equal to the module width of the entire two modules when the first and second modules 12 and 13 are placed. In other words, the base 11 is sized so that two modules can be placed on it in the horizontal direction.

Each of the first and second modules 12 and 13 is, for example, a device obtained by modularizing a machining center, and cuts a workpiece with a drill or an end mill. The first and second modules 12 and 13 are not limited to machining center modules, and may be other modules such as lathe modules. More specifically, the first and second modules 12 and 13 may be devices that cut the work with a cutting tool held by a head while rotating the work with a spindle. In addition, as described above, the machine tool 10 can replace the first and second modules 12, 13 with other types of modules. For this reason, one of the first and second modules 12 and 13 may be replaced with a lathe module, and modules of different types may be connected by a connecting member 105, which will be described later. Also, the first and second modules 12 and 13 may be fixed to the base 11 and cannot be replaced. Also, the number of modules arranged on the base 11 is not limited to two, and may be three or more. In this case, for example, two adjacent modules may be connected using a plurality of connecting members 105, which will be described later.

As shown in FIG. 4, the first column 32 of the first module 12 is fixed on the first bed 31 and has, for example, a substantially box shape. The first column 32 is provided substantially in the center of the first module 12 in the front-rear direction, and functions as a support for supporting the first machining center 33 . The first machining center 33 is a processing device that processes a workpiece (not shown) and is supported by the first column 32 . A first control panel 35 is a device for controlling the first machining center 33 , is provided behind the first column 32 , and is fixed to the first column 32 and the first bed 31 . The first machining center 33 is a so-called vertical machining center. A head moving device 55 for moving (back and forth direction and left and right direction) and a work table 57 for holding a work are provided. In order to avoid complication of the drawing, the work table 57 is illustrated by broken lines in FIG.

The head moving device 55 and the head lifting device 53 are supported by the first column 32 above the first column 32 . The head moving device 55 has a first slider 61 , a forward/backward moving motor 65 and a second slider 67 . A guide rail 59 extending in the front-rear direction is provided on the upper portion of the first column 32 . A first slider 61 of the head moving device 55 is attached to the guide rail 59 by a plurality of bearings 63 and held so as to be slidable in the front-rear direction with respect to the first column 32 . The first slider 61 is moved in the front-rear direction by a front-rear movement mechanism including a front-rear movement motor 65 and a ball screw mechanism.

The second slider 67 is attached so as to be slidable in the left-right direction along a guide rail (not shown) provided on the front surface of the first slider 61 . The second slider 67 is moved in the left-right direction by a left-right movement mechanism (not shown) including a left-right movement motor of the head moving device 55 and a ball screw mechanism. Slide in the direction The spindle head 51 is attached to the front surface of the second slider 67 so as to be vertically slidable relative to the second slider 67 . The head lifting device 53 includes a head lifting motor, a ball screw mechanism, and the like, and vertically moves the spindle head 51 supported by the second slider 67 . The spindle head 51 is supported at a position forward of the front surface of the first column 32 by the head moving device 55 and the head lifting device 53 described above. The spindle head 51 moves to any position in the left-right direction and the front-rear direction based on the drive of the head moving device 55 . Further, the spindle head 51 moves to any position in the vertical direction based on the drive of the head lifting device 53 .

The spindle head 51 extends in the vertical direction, holds a tool (not shown) such as a drill or an end mill at its lower end, and rotates the tool around a spindle extending in the vertical direction. The spindle head 51 is lowered by driving the head lifting device 53 and inserted into the first machining space 39 surrounded by the first machining space cover 81 (see FIG. 7) of the first device cover 36 . In order to avoid complication of the drawing, FIG. 4 omits illustration of a tool and a work held by the spindle head 51. As shown in FIG.

FIG. 7 is a perspective view of the first device cover 36 as seen from the lower right rear. As shown in FIGS. 2, 4 and 7, the first device cover 36 is made of, for example, a metal material (such as iron), and includes a first processing space cover 81, a pair of first flat plate covers 82 and 83, a travel It has a road cover 85 . The first machining space cover 81 is provided in front of the first module 12 and covers the first machining space 39 for machining the workpiece. The first processing space cover 81 has an elastic member 91 , a rear cover 92 , a front cover 93 , a left cover 94 and a right cover 95 . The first machining space cover 81 covers the first machining space 39 having a substantially rectangular parallelepiped shape elongated in the vertical direction. The expandable member 91 is provided above the first processing space 39 . The expandable member 91 is, for example, a bellows-shaped member that can expand and contract in the left-right direction and the front-rear direction. The expandable member 91 partially closes the upper surface of the first machining space 39 and covers the first machining space 39 in a portion where the first machining center 33 including the spindle head 51 is not arranged. The expandable member 91 expands and contracts according to the movement of the spindle head 51 in the front-rear direction and the left-right direction to cover the upper surface of the first machining space 39 and suppress scattering of chips.

The first machining center 33 has a table rotating device 69 provided on the first column 32 . A through hole 92A (see FIG. 7) is formed in the rear cover 92 of the first machining space cover 81 in accordance with the position and shape of the table rotating device 69. As shown in FIG. The through hole 92</b>A is a circular hole that penetrates the flat rear cover 92 in the front-rear direction, and is formed below the rear cover 92 . A part of the table rotating device 69 protrudes forward through the through hole 92A and is inserted into the first processing space 39 . The work table 57 is supported by a portion of the table rotating device 69 protruding into the first processing space 39 and is supported within the first processing space 39 . The table rotating device 69 rotates the work table 57 around an axis extending in the front-rear direction. The first machining center 33 rotates the work table 57 so that the work (not shown) held on the work table 57 can be machined with the tool in a tilted state. The configuration of the first machining center 33 described above is an example. For example, the table rotating device 69 may be configured to rotate the work table 57 not only in the front-rear direction but also around an axis extending in the left-right direction.

In addition, the machine tool 10 of the present embodiment transfers workpieces to and from each module by using, for example, a workpiece transfer/removal device 68 shown in FIG. A pair of rails 71 shown in FIG. 6 are attached to the front surface of the base 11 along the left-right direction. 1 to 5, illustration of the rail 71 is omitted. The work conveying/removing device 68 is movable in the left-right direction along a pair of rails 71, and conveys the work over a plurality of modules (first module 12, second module 13, etc.). The work transfer/removal device 68 has an articulated arm 73 and a chuck 75 provided at the tip of the arm 73 . The work conveying/removing device 68 can hold a work (not shown) with a chuck 75 .

The front cover 93 of the first machining space cover 81 includes a first front cover 93A arranged on the left side of the front surface of the first machining space 39 and a second front cover 93B arranged on the right side of the first front cover 93A. (see FIG. 2). The first and second front covers 93</b>A and 93</b>B have a plate shape elongated in the vertical direction and close the front surface of the first processing space 39 . Also, the first and second front covers 93A and 93B are so-called double doors that can be opened rearward inwardly based on the driving of an air cylinder (not shown). The first and second front covers 93A and 93B can be opened in the front surface of the first processing space 39 at substantially the center in the left-right direction. The first front cover 93A is provided with an observation window 93C through which the inside of the first machining space 39 can be checked with the travel path cover 85, which will be described later, opened.

The work transfer/removal device 68 moves to the front of a predetermined module, for example, the first module 12, extends the arm 73 into the first processing space 39, and receives the work on the work table 57 of the first module 12 with the chuck 75. Alternatively, the work is mounted on the work table 57 . At this time, the first control panel 35 drives the air cylinder to open the first and second front covers 93A and 93B, thereby opening the front surface of the first machining space 39. As shown in FIG. Further, the first control panel 35 closes the first and second front covers 93A and 93B to close the front surface of the first machining space 39 when the work carried out by the work transfer/removal device 68 is completed. As a result, the workpiece transfer/removal device 68 can transfer workpieces to and from each module. Note that the device that transfers workpieces to and from each module is not limited to the articulated robot shown in FIG. For example, the workpiece transfer/removal device may be configured by combining two types of slide devices, one that moves in the left-right direction on the front surface of the base 11 and the other slide device that moves in the front-rear direction in each module. Alternatively, the user may manually attach the workpiece.

The first module 12 also has a mechanism for recovering coolant used in machining the workpiece and cutting waste generated in machining. Specifically, as shown in FIG. 4, the base 11 is provided with a coolant tank 77 that stores coolant. A discharge duct 79 is provided on the upper surface of the base 11 and the lower surface of the first machining space cover 81 (the first machining space 39). The lower surface of the first processing space cover 81 is open, and a substantially rectangular opening that is elongated in the front-rear direction is formed. An inclined plate 97 is attached to the lower surface of the first processing space cover 81 and is inclined downward toward the opening. The inclined plate 97 is attached, for example, to the lower end of each of the rear cover 92, the front cover 93, the left cover 94, and the right cover 95 (see FIG. 9). The discharge duct 79 is arranged in the opening on the lower surface of the first processing space cover 81 and is formed to match the size of the opening surrounded by the four inclined plates 97 and the rear cover 92 . A discharge duct 79 receives coolant and chips below the worktable 57 and discharges them to the coolant tank 77 . The discharge duct 79 has, for example, a rectangular frame shape elongated in the front-rear direction in plan view from above. Although detailed description is omitted, the coolant tank 77 is equipped with a screw conveyor or the like, and separates and collects the coolant collected through the discharge duct 79 and the chips.

4 and 7, the left side cover 94 and the right side cover 95 of the first processing space cover 81 are formed in the shape of flat plates elongated in the vertical direction. covers each of the Observation windows 94A and 95A are formed in the left cover 94 and the right cover 95, respectively. For example, when the first module 12 is pulled forward, the user can check the inside of the first processing space 39 through the observation windows 94A and 95A.

A tool magazine (not shown) is built in the first column 32 . For example, the tool magazine is provided above the table rotating device 69 and stores a plurality of tools to be attached to the spindle head 51 of the first machining center 33 . The first machining center 33 can automatically replace one of the plurality of tools stored in the tool magazine with a tool (not shown) attached to the spindle head 51 .

Although details are omitted, the first control panel 35 moves, for example, the spindle head 51 backward and the tools and tool holders held in the tool magazine forward during tool exchange, thereby performing the first machining. It is moved to a predetermined replacement position within the space 39 . A rear cover 92 of the first processing space cover 81 is provided with an opening/closing door 92B (see FIG. 7). The opening/closing door 92B is a so-called double door, and is configured to open forward. The opening/closing door 92B is connected to the tool magazine, opens in conjunction with the forward movement of the tool and tool holder, and closes in conjunction with the rearward movement. At the time of tool exchange, for example, the tool magazine rotates the tool holder, and moves the tool holder, which houses the tool to be exchanged or the used tool, to a predetermined rotational position. The tool magazine projects a tool or the like to be replaced forward from an opening (not shown) provided on the front surface of the first column 32, and arranges the tool or the like at the replacement position. In conjunction with this, the opening/closing door 92B is opened forward. The spindle head 51 receives a tool to be replaced and returns a used tool at the replacement position. It should be noted that the opening/closing door 92B is closed during the machining operation, so that coolant, cutting chips, etc. are prevented from entering the inside of the first column 32. As shown in FIG.

Therefore, the first column 32 of this embodiment includes the head moving device 55 for moving the spindle head 51 along the lateral axis (X axis) and the longitudinal axis (Y axis), and the vertical direction. is a member to which a head lifting device 53 is attached (supports) to move it along the axis (Z-axis). Further, the first column 32 of this embodiment is also a member to which a table rotating device 69 for rotating a work is attached and a tool magazine for storing replacement tools is built therein. If the first module 12 is a lathe module, the first column 32 serves as a member that supports, for example, a spindle device that chucks and rotates a workpiece, a turret moving device that rotates and moves a turret, and the like.

Also, as shown in FIG. 7 , the pair of first flat plate covers 82 and 83 are provided above the first processing space cover 81 . The first flat plate cover 82 has a flat plate shape, is fixed to the upper end portion of the left cover 94 , and is arranged along the plane of the left cover 94 . The first flat plate cover 83 has a flat plate shape, is fixed to the upper end portion of the right cover 95 (see FIG. 4), and is arranged along the plane of the right cover 95 . Note that the first flat plate cover 82 may not be a member separated from the left cover 94, but may be formed of a single metal plate or the like. The same applies to the first flat plate cover 83 and the right cover 95 .

The pair of first flat plate covers 82 and 83 are arranged parallel to each other with their planes facing each other with a width substantially equal to the width of the first processing space 39 in the left-right direction. In a plan view shown in FIG. 3, the pair of first flat plate covers 82 and 83 face each other with the expandable member 91 and the head lifting device 53 sandwiched therebetween in the left-right direction. Similarly, the pair of second flat plate covers 98 and 99 of the second module 13 are arranged to sandwich the expandable member 101 and the head lifting device 102 of the second module 13 in the horizontal direction. In the machine tool 10 of this embodiment, the first flat plate cover 83 on the left side of the first module 12 and the second flat plate cover 99 on the right side of the second module 13 are connected by a connecting member 105 . Details of the connecting member 105 will be described later.

Also, the first device cover 36 is fixed only to the first column 32 and the first bed 31 . More specifically, the first machining space cover 81 of the first device cover 36 is fixed to the front surface of the first column 32 by a plurality of threaded members 113 (see FIG. 4). The threaded member 113 is, for example, a screw, bolt, nut, or the like. A plurality of through holes 115 (see FIG. 7) are formed at both ends of the rear cover 92 in the left-right direction. Each of the plurality of screwing members 113 is inserted into the through hole 115 and screwed into a screwed portion formed on the front portion of the first column 32 .

Further, as shown in FIG. 7, connecting bars 117 connecting the first bed 31 and the first processing space cover 81 are provided below the left cover 94 and the right cover 95, respectively. The pair of connecting bars 117 are metal members extending in the front-rear direction, and are fixed to the lower surface of each of the left cover 94 and the right cover 95 . Each rear end of the connecting bar 117 is fixed to the front end of the first bed 31 by a threaded member (screw, bolt, etc.) 119 . Therefore, the first machining space cover 81 has the lower end of the rear end portion fixed to the first bed 31 via the connecting bar 117, the upper portion (rear cover 92) fixed to the first column 32, and the front portion , left and right side surfaces, top surface, etc. are not fixed. This is because, for example, it is difficult to fix the first device cover 36 to movable parts such as the first machining center 33 and the work conveying/removing device 68, and it is also difficult to fix to the base 11 which slides relatively. be. The first machining space cover 81 is fixed to the first column 32 by a threaded member 113 , fixed to the first bed 31 by a threaded member 119 , and slides in the front-rear direction together with the first bed 31 . It should be noted that the fixing portion of the first device cover 36 described above is an example. For example, the rear end of the later-described side cover 108 may be fixed to the first control panel 35 .

As shown in FIGS. 2 to 4, side covers 107 and 108 are provided at upper ends of the first flat covers 82 and 83, respectively. 7 shows a state in which the side covers 107 and 108 are removed. The side covers 107 and 108 are rectangular plate-like members elongated in the front-rear direction. The side cover 107 is fixed to the upper end of the first flat plate cover 82 . A front end of the side cover 107 is attached to a head cover 111 of the first device cover 36, which will be described later. A rear end of the side cover 107 extends to a position close to the first control panel 35 . Similarly, the side cover 108 is fixed to the upper end of the first flat cover 83 . Side covers 109 and 110 are provided at upper ends of the second flat plate covers 98 and 99 of the second device cover 46, respectively, similarly to the first flat plate covers 82 and 83. As shown in FIG.

Further, as shown in FIGS. 1 and 2 , an operation section 121 and a lamp 123 are attached to the front surface of the first device cover 36 . The operation unit 121 includes a touch panel or the like for receiving operation input from the user. The head cover 111 is provided on the upper end of the front surface of the first module 12 and has a curved surface on the front surface (see FIG. 2). The operation unit 121 is attached to the upper part of the front surface of the first module 12 and below the head cover 111 . The lamp 123 is a device that lights up in response to an error or the like, protrudes upward from a hole formed in the head cover 111, is attached in an upright state, and has a lamp attached to the top.

A running path cover 85 is attached to the front portion of the first device cover 36 . The travel path cover 85 has a curved shape that covers the rails 71 (see FIG. 6) of the work conveying/removing device 68 . The travel path cover 85 is rotatably supported by bearing members 125 (see FIG. 7) provided on each side of the operation unit 121 in the left-right direction as indicated by broken lines in FIG. 2, and is rotatable upward. It has become. The same applies to the travel path cover 159 of the second device cover 46 (see FIG. 5). The travel path cover 85 has a wing-like shape of a so-called gull-wing structure, and has a substantially Z-shape as a whole when viewed in the left-right direction. It can be opened and closed upwards by holding the The travel path cover 85 is not fixed at the tip so as to be openable and closable. That is, the curved tip of the travel path cover 85 is a free end with the portion to which the bearing member 125 is attached as a fixed end. Incidentally, the tip of the travel path cover 85 may be detachably attached to the front cover (not shown) of the base 11 . Also, a teaching pendant 129 for operating the work conveying/removing device 68 and the like is attached to the lower portion of the front surface of the travel path cover 85 . Further, the travel path cover 85 is formed with an observation window 85A in a portion that covers the upper part of the travel path of the work conveying/removing device 68 .

(Regarding connecting member 105)
Here, in the first module 12 of this embodiment, the width of the first module 12 in the left-right direction can be made extremely small by making the width of the first device cover 36 in the left-right direction substantially the same as the width of the discharge duct 79. . As a result, the installation area of the machine tool 10 can be reduced. On the other hand, if the first device cover 36 is reduced to the width of the discharge duct 79 on the front side of the first module 12, it becomes difficult to dispose a member for fixing the first device cover 36. FIG. As described above, the first device cover 36 is fixed only to the first bed 31 and the first column 32 arranged on the rear side of itself. The first device cover 36 vibrates due to transmission of vibration generated in accordance with the machining operation of the first machining center 33 .

Also, in order to eliminate the clogging of coolant and chips and collect them efficiently, it is necessary to secure a certain length as the width in the front-rear direction of the first machining space 39 . As a result, the structure is such that the first device cover 36 is supported on the rear side, and it becomes difficult to suppress the vibration generated in the first device cover 36 . Vibration generated in the first device cover 36 affects the machining of the workpiece by the device itself. In addition, since the first and second modules 12 and 13 are arranged on the same base 11, vibrations generated in each module are transmitted through the base 11 and influence each other's processing. Specifically, the surface roughness of the machined surface of the work deteriorates due to the vibration of the device itself or another device. Further, by providing the operation unit 121 and the lamp 123 on the upper front surface of the first device cover 36, the operability and convenience for the user can be improved. On the other hand, the first device cover 36 is heavy on the front upper portion away from the rear lower end, which is the fixing portion. Therefore, there is a possibility that the amplitude of the vibration generated in the first device cover 36 and the like is increased.

Therefore, in the machine tool 10 of this embodiment, the first and second device covers 36, 46 of the first and second modules 12, 13 arranged on the same base 11, that is, originally each Vibration is suppressed by intentionally connecting the covers of each module, which is the source of vibration. 8 shows an exploded perspective view of the connecting member 105. FIG. The direction of each member shown in FIG. 8 is the direction when the member is attached to the machine tool 10 . The following description is based on the direction in which the connecting member 105 is attached to the machine tool 10 .

As shown in FIG. 8, the connecting member 105 includes a first plate member 141, a second plate member 142, a threaded member 143, a plurality of (four in FIG. 8) washers 144, two spring washers 145 and 146, It has two nuts 147,148. The first and second plate members 141 and 142 are, for example, plate-like members made of metal and have the same shape. Therefore, in the following description, the first plate member 141 will be mainly described, and the description of the second plate member 142 will be omitted as appropriate.

The first plate member 141 has a predetermined width in the front-rear direction and is thin in the left-right direction. has an upper plate portion 141B with a small width. The lower plate portion 141A is fixed to the side surface cover 108 of the first device cover 36 and the inner side (right side surface) of the first flat plate cover 83 by a plurality of threaded members (bolts, screws, etc.) 151 . The first plate member 141 is attached in a state in which the plane faces the side cover 108 and the first flat plate cover 83 . Alternatively, the first plate member 141 may be fixed to only one of the side cover 108 and the first flat plate cover 83 . Similarly, the lower plate portion 142A of the second plate member 142 is fixed to the inner side (left surface) of the side cover 110 of the second device cover 46 and the second flat plate cover 99 by a screw member (not shown). .

The upper plate portion 141B of the first plate member 141 extends along the rear edge of the lower plate portion 141A. A first notch portion 141C is formed in the upper plate portion 141B. 141 C of 1st notch parts are formed in the upper end of the upper side board part 141B, and the center part of the front-back direction. 141 C of 1st notch parts are groove|channels which are extended in an up-down direction, and the lower end part makes circular arc shape, when it sees from a left-right direction. Similarly, the upper plate portion 142B of the second plate member 142 is formed with a second notch portion 142C that is cut in an arc shape. The threaded member 143 is inserted from above into the first and second notch portions 141C and 142C.

The threaded member 143 includes a cylindrical portion 143A, a first threaded portion 143B, and a second threaded portion 143C. The columnar portion 143A has a columnar shape whose axial direction is the left-right direction. The first threaded portion 143B extends axially from the center of the right side surface of the cylindrical portion 143A and has a cylindrical shape that is thinner than the cylindrical portion 143A. A female screw (not shown) for screwing the nut 147 is formed on the outer peripheral surface of the first screwed portion 143B. A plurality of washers 144 are inserted into the first threaded portion 143B and sandwiched between the cylindrical portion 143A and the upper plate portion 141B. Spring washer 145 is sandwiched between upper plate portion 141B and nut 147 .

A plurality of washers 144 and spring washers 145 are inserted into the first screwed portion 143B, and a nut 147 is tightened while being inserted into the first notch portion 141C from above. The cylindrical portion 143A functions as a spacer that adjusts the gap between the first and second plate members 141,142. The number of washers 144 is such that, for example, the gap between the upper plate portions 141B and 142B is approximately the same as the width 15 of the first and second modules 12 and 13 (first flat cover 83 and second flat cover 99) shown in FIG. adjusted to the desired number. As a result, the first and second plate members 141 and 142 can be fixed parallel to each other.

The second threaded portion 143C extends in the axial direction from the center of the left side surface of the cylindrical portion 143A and has a cylindrical shape that is thinner than the cylindrical portion 143A. A female screw (not shown) for screwing the nut 148 is formed on the outer peripheral surface of the second screwed portion 143C. Spring washer 146 is sandwiched between upper plate portion 142B and nut 148 . A spring washer 146 is inserted into the second screwed portion 143C, and a nut 148 is tightened while being inserted into the second notch portion 142C from above. As shown in the enlarged views of FIGS. 1 to 3, each of the upper plate portions 141B and 142B protrudes above the side covers 108 and 110, and is fixed by a threaded member 143 at the protruding portion. . The connecting member 105 is fixed so as to straddle the side covers 108 and 110 from above.

As a result, the first and second device covers 36 and 46 are connected to each other by the connecting member 105 . The first and second device covers 36 and 46 are partially integrated by the connecting member 105 . Thereby, for example, when the second device cover 46 is not vibrating (the second module 13 is not processed), the first device cover 36 is supported by the second device cover 46 via the connecting member 105. By doing so, the magnitude of the generated vibration can be reduced. Also, when both the first and second device covers 36 and 46 vibrate, the vibration generated in each module is transmitted via the connecting member 105 . To reduce or cancel the vibrations generated in the first and second device covers 36, 46 and the first and second machining centers 33, 43 by transmitting the vibrations generated in the first and second device covers 36, 46. becomes possible.

Furthermore, the machine tool 10 can have a smaller footprint by arranging the first and second modules 12, 13 adjacent to each other. By connecting the first and second modules 12 and 13 adjacent to each other in this manner, it is possible to achieve a synergistic effect that the installation area can be reduced, vibration can be reduced, and the machining accuracy of the workpiece can be improved. Here, it is conceivable to configure the first and second device covers 36, 46 as one cover, that is, to cover the first and second machining centers 33, 43 with one cover. Individual maintenance by sliding each module as in the embodiment becomes difficult. Furthermore, when the cover is integrated into one, if the cover as a whole vibrates with its natural vibration, the influence of the vibration on the machined surface may increase. As another measure against vibration, for example, when one of the first and second modules 12 and 13 performs machining that requires a high degree of surface roughness, the operation of the other module may be stopped. be done. However, in such a method, the longer the stop time, the longer the work cycle time. On the other hand, in the machine tool 10 of the present embodiment, the vibration generated in each of the first and second modules 12 and 13 is mutually transmitted and canceled out, thereby suppressing the vibration as a whole. Therefore, the machining accuracy can be improved while shortening the cycle time.

FIG. 9 shows a state in which the first and second device covers 36, 46 are viewed from above. 9 omits illustration of the expandable members 91 and 101 and the first and second machining centers 33 and 43. As shown in FIG. Also, the hatched portions in FIG. 9 indicate fixing locations of the first and second device covers 36 and 46 . As described above, the first machining space 39 has a rectangular shape elongated in the front-rear direction when the first device cover 36 is viewed from above from the viewpoint of efficiency in collecting chips. Similarly, the second processing space 151 of the second module 13 also has a rectangular shape elongated in the front-rear direction. The first device cover 36 is fixed to the first column 32 only at the rear end of both ends in the front-rear direction. Similarly, the second device cover 46 is also fixed to the second column 42 (see FIG. 5) only at its rear end.

With such a configuration, for example, the first device cover 36 may vibrate such that the rear end is fixed and the front end is free. That is, while the number of fixing points of the first device cover 36 can be reduced to minimize the module width and module length and the size of the device can be reduced, vibration of the first device cover 36 may increase. On the other hand, by connecting the first and second device covers 36 and 46 using the connecting member 105, the machine tool 10 as a whole can be downsized and the machining accuracy can be improved.

Also, the first column 32 is arranged on the first bed 31 . Also, the first device cover 36 is fixed to each of the first column 32 and the first bed 31 . According to this, the first device cover 36 is added to the first column 32 and is also fixed to the first bed 31 at the rear end side. The first device cover 36 can be stably fixed to the first bed 31, and displacement and vibration of the first device cover 36 accompanying the sliding movement of the first bed 31 can be suppressed.

The connecting member 105 is attached to the front end portion of the first device cover 36 on the side opposite to the first column 32 in the front-rear direction and to the upper end portion of the first device cover 36 above the first column 32 . there is This connects the first and second device covers 36, 46 at a position farther from the fixed rearward and downward position supported by the first column 32, i.e., above the front end, where the amplitude energy is likely to be greater. can. Vibrations generated in the first and second device covers 36, 46 can be more effectively suppressed.

A first center of gravity 153 in FIG. 9 indicates the position of the center of gravity of the first device cover 36 . A second center of gravity 154 indicates the position of the center of gravity of the second device cover 46 . As shown in FIG. 9, the first center of gravity 153 is arranged between the connecting member 105 and the first column 32 (position fixed to the first column 32) in the front-rear direction. Similarly, the second center of gravity 154 is arranged between the connection member 105 and the position fixed to the second column 42 in the front-rear direction. Further, the first device cover 36 has a shape elongated in the front-rear direction, and has an operation section 121, a lamp 123, a travel path cover 85, and a teaching pendant 129 on the front side. Therefore, the first center of gravity 153 is shifted forward (connecting member 105 side) from the center 161 of the first machining space 39 (the central position in the front-rear direction) in plan view. Similarly, the second center of gravity 154 is located forward from the center 162 of the second machining space 151 by providing the operating portion 157, the lamp 158, the travel path cover 159, and the teaching pendant 163 on the front side of the second device cover 46. (connecting member 105 side).

In such a configuration, the first and second centers of gravity 153, 154 are positioned forwardly apart from the hatched fixed positions, so the first and second device covers 36, 46 are further forward. There is a possibility that the vibration energy increases as the number increases. However, if the longitudinal dimensions of the first and second device covers 36, 46 are reduced in order to shift the first and second centers of gravity 153, 154 rearward, there will be sufficient space for efficient evacuation of chips and the like. cannot be secured in the first and second machining spaces 39 and 151. Therefore, connecting the first and second device covers 36 and 46 located at such a center of gravity position with the connecting member 105 is extremely effective from the viewpoint of improving the machining accuracy while securing a sufficient machining space.

FIG. 10 shows how the position of the center of gravity changes between the state in which the connection member 105 is not attached and the state in which the connection member 105 is attached. As shown in the left diagram of FIG. 10, when the connecting member 105 is not attached, the first and second device covers 36 and 46 are separated from each other, and the first and second machining centers 33 and 43 are separated from each other. vibrate individually according to the vibration generated by machining. For example, each of the first and second device covers 36, 46 may start from the portion fixed to the first and second columns 32, 42 on the rear side, and may be moved according to the positions of the first and second centers of gravity 153, 154. It vibrates significantly in the left and right direction, and each device cover vibrates uniquely (see the arrows in the left figure).

On the other hand, as shown in the right diagram of FIG. 10, when the connecting member 105 is attached, the first and second device covers 36 and 46 are integrated by the connecting member 105 to form a cover-like state. The center of gravity of each of the first and second modules 12 and 13 moves to the center in the left-right direction. becomes. The first and second modules 12 and 13 have a more stable structure in which the center of gravity 155 is placed in the center in the horizontal direction with respect to the entire portion fixed to the first and second columns 32 and 42 on the rear side ( See triangle in Figure 10). As a result, the first and second modules 12 and 13 are integrated with one center of gravity, and vibration can be effectively reduced or canceled (see arrows in the right figure).

In addition, the first device cover 36 is connected to the second device cover 46 by a connecting member 105 by connecting the first flat plate cover 83 closer to the second module 13 in the left-right direction out of the pair of first flat plate covers 82 and 83 . ing. As a result, the axial lengths of the cylindrical portion 143A and the first and second screwed portions 143B and 143C of the threaded member 143 can be shortened, and the connecting member 105 can be made more compact. In addition, since the adjacent flat plate covers (first flat cover 83, second flat cover 99) are fixed, compared to the case of fixing separated flat plate covers (first flat plate cover 82, second flat plate cover 98), the The flat plate cover can be fixed stably.

The connecting member 105 is configured such that the threaded member 143 is inserted from above into the first and second plate members 141 and 142 attached to the first and second device covers 36 and 46, respectively. Therefore, for example, by loosening one of the nuts 147 and 148 and removing the member 143 to be screwed from the first and second plate members 141 and 142, the first and second modules 12 and 13 can be easily disconnected. can. When the first and second modules 12 and 13 are individually slid, the work load of removing the connecting member 105 can be reduced.

Further, the first device cover 36 has an operation section 121 on the upper part of the device front. Further, the first device cover 36 has a travel path cover 85 that covers the travel path of the work conveying/removing device 68 . One end of the travel path cover 85 is supported by the body portion (bearing member 125) of the first device cover 36, and extends in a curved shape covering the travel path from one end, and the extended tip is a free end. there is In such a configuration, there is a possibility that the vibration energy of the front end upper portion of the first device cover 36 may increase due to the operating portion 121 provided on the front upper portion. Also, the running path cover 85, which is fixed only at one end, may also generate greater vibration at the free end. Therefore, connecting the first device cover 36 having such a configuration with the connecting member 105 is extremely effective from the viewpoint of suppressing vibration.

Furthermore, in the machine tool 10 of this embodiment, the first module 12 and the second module 13 have the same configuration. Therefore, the two modules have the same mass, generated vibration, arrangement of the center of gravity, and the like. The effect of canceling out the vibration generated in each module can be exhibited more effectively, and the vibration can be effectively suppressed. In particular, when two modules are caused to perform the same work, the two modules vibrate in the same phase, and the vibrations generated in each module can be effectively canceled. Further, as shown in FIG. 9, in the first and second modules 12 and 13 having the same configuration, the connecting member 105 is arranged at the center position in the left-right direction of the first and second centers of gravity 153 and 154 . In other words, the first and second modules 12 and 13 are arranged symmetrically around the connecting member 105 . This also makes it possible to more effectively cancel out the vibrations generated in each module.

Incidentally, the first machining center 33 is an example of a first processing device. The second machining center 43 is an example of a second processing device. The first plate member 141 is an example of a first member. The second plate member 142 is an example of a second member. The cylindrical portion 143A is an example of a spacer portion. Nut 147 is an example of a first screw member. Nut 148 is an example of a second screw member. The work transfer/removal device 68 is an example of a robot.

As described above, the present embodiment described above has the following effects.
A machine tool 10 according to one aspect of the present application includes first and second modules 12 and 13 slidably arranged on a base 11 . The connecting member 105 connects and holds the upper front end of the first device cover 36 of the first module 12 and the upper front end of the second device cover 46 . The first and second device covers 36 and 46 vibrate due to the machining operations of the first and second machining centers 33 and 43, respectively. Vibrations generated in each of the first and second device covers 36 and 46 are transmitted via the connecting member 105 . By intentionally transmitting the vibration generated in the first and second device covers 36, 46, the vibration generated in the first and second device covers 36, 46, the first and second modules 12, 13, etc. is reduced. or can be offset.

In addition, the contents of the present disclosure are not limited to the above embodiments, and can be implemented in various modes with various modifications and improvements based on the knowledge of those skilled in the art.
For example, the shape of the first processing space cover 81 is not limited to the shape of the above embodiment. The first processing space cover 81 may be configured to cover all six surfaces of the first processing space 39 . In this case, a receiving tray for cutting chips may be provided in the first machining space 39 and a hole for discharging cutting chips may be provided in the lower surface of the first machining space cover 81 .
The base 11 is not limited to a device integrated with one frame or the like, and may be configured by connecting a plurality of bases, for example, the base of the first module 12 and the base of the second module 13 .
In the above embodiment, the module arranged on the right side is the first module 12, but the first module may be the module on the left side (the second module 13 in the above embodiment). In this case, the second bed 41 becomes the first bed of the present disclosure.
The sliding direction of the present disclosure is not limited to the front-rear direction, and may be, for example, a direction forming a predetermined angle with respect to the front-rear direction. Also, the direction in which the first and second modules are arranged is not limited to the left-right direction, and may be a direction forming a predetermined angle with respect to the left-right direction.

Although the first apparatus cover 36 is fixed to the first column 32 and the second bed 41 in the above embodiment, it may be fixed to only one of them. Alternatively, the first device cover 36 may be fixed to another device such as the first control panel 35 or the like.
The mounting position of the connecting member 105 in the above embodiment is an example. For example, the connecting member 105 may be attached between the fixed position of the first column 32 and the first center of gravity 153 in the front-rear direction in the plan view of the first device cover 36 . Alternatively, the connecting member 105 may be attached to the rear of the side cover 108 (position close to the first control panel 35). In this case, the attachment position of the connecting member 105 is behind the position where the first device cover 36 is fixed to the first column 32 . Alternatively, the connecting member 105 may be used to connect the traveling path covers 85 and 159 .

Of the pair of first flat plate covers 82 and 83 , the first flat plate cover 82 or the side cover 107 that is farther from the second module 13 in the left-right direction may be connected to the second device cover 46 .
The first and second modules 12 and 13 are not limited to machining centers, and may be machining modules that generate other vibrations, such as lathes.
The configuration, shape, and the like of each member/device such as the first device cover 36 and the connecting member 105 are examples. For example, the first flat plate covers 82 and 83 may be partially curved. The connecting member 105 does not have to be provided with the spring washers 145 and 146 . The first plate member 141 may have a circular hole or the like instead of a partially open groove such as the first notch portion 141C as a portion to which the second screwed portion 143B is attached. In this case, the first threaded portion 143B may be inserted into the first plate member 141 and fixed with the nut 147 . The member to be screwed 143 may not have a cylindrical portion 143A and may have a cylindrical shape having the same outer diameter as the first portion to be screwed 143B and the second portion to be screwed 143C. In this case, the gap between the first and second plate members 141 and 142 may be adjusted only with the washer 144 . The first and second members of the present disclosure are not limited to plate shapes such as the first and second plate members 141 and 142, and may be other shapes such as rod shapes. The first device cover 36 does not have to include the travel path cover 85 . The space portion of the present disclosure is not limited to a columnar shape, and may be a square column or the like.

11 base, 12 first module, 13 second module, 31 first bed, 32 first column, 33 first machining center (first processing device), 36 first device cover, 42 second column, 43 second machining center ( second processing device), 46 second device cover, 39 first processing space, 68 workpiece transfer/removal device (robot), 81 first processing space cover, 82, 83 first flat plate cover, 85 travel path cover, 121 operation unit , 141 first plate member (first member), 141C first notch portion, 142 second plate member (second member), 142C second notch portion, 105 connecting member, 143 member to be screwed, 143A cylindrical portion (spacer portion), 147 nut (first threaded member), 148 nut (second threaded member), 151 second machining space, 153 first center of gravity.

Claims (8)

a base;
a first module arranged on the base and configured to be slidable in a sliding direction with respect to the base, and performing machining on a workpiece;
a second module arranged on the base, configured to be slidable in the sliding direction with respect to the base, arranged side by side with the first module, and performing machining on the workpiece;
a connecting member that connects the first module and the second module;
with
The first module is
a first machining device for machining the workpiece;
a first device cover that covers at least part of a first machining space in which the first machining device performs machining on the workpiece;
has
The second module is
a second machining device for machining the workpiece;
a second device cover that covers at least part of a second machining space in which the second machining device performs machining on the workpiece;
has
The connecting member is
A machine tool that connects and holds a portion of the first device cover and a portion of the second device cover. The first module is
A first column that supports the first processing device,
The first processing space is
When the first device cover is viewed from above, it has a long rectangular shape in the sliding direction,
The first device cover,
2. The machine tool according to claim 1, wherein one end of both ends in said sliding direction is fixed to said first column. The first module is
a first bed configured to be slidable in the sliding direction with respect to the base;
The first column is
arranged on the first bed,
The first device cover,
3. The machine tool of claim 2, fixed to each of said first column and said first bed. The connecting member is
3. Attached to the upper end of the first device cover above the first column and at the end of the first device cover opposite to the first column in the sliding direction. 4. The machine tool according to 3. The first device cover,
When the first device cover is viewed from above, a first center of gravity, which is the center of gravity of the first device cover, is arranged between the connecting member and the first column in the sliding direction;
The first center of gravity is
The machine tool according to any one of claims 2 to 4, wherein the machine tool is arranged closer to the connecting member than a central position of the first machining space in the sliding direction. The first device cover,
Having a first processing space cover covering the first processing space and a pair of first flat plate covers,
The first processing space cover,
attached to the first column;
Each of the pair of first flat plate covers,
The first module and the second module are arranged so that their planes face each other in the direction in which they are arranged, and the lower end is supported by the first processing space cover,
The first device cover,
Of the pair of first flat plate covers, the first flat plate cover closer to the second module in the direction in which the first module and the second module are arranged is connected to the second device cover by the connecting member. 6. A machine tool as claimed in any one of claims 2 to 5, wherein: The connecting member is
a first member attached to the first device cover and having a first notch;
a second member attached to the second device cover and having a second notch;
a member to be screwed that is inserted into both the first notch portion and the second notch portion;
a first screwing member and a second screwing member that are screwed to the member to be screwed;
has
The member to be screwed is
a spacer portion sandwiched between the first member and the second member in a state of being inserted into both the first cutout portion and the second cutout portion;
The first threaded member is
The first member is sandwiched between the spacer portion and the spacer portion by being screwed to the screwed member,
The second threaded member is
The machine tool according to any one of claims 1 to 6, wherein the second member is sandwiched between the spacer portion and the spacer portion by being screwed to the screwed member. The first module is
An operation unit that receives operation input is provided on the upper part of the front of the device, and the workpiece is transferred to and from a robot that moves on the front side of the device,
The first device cover,
Having a travel path cover covering the travel path of the robot;
The travel path cover is
8. The cover according to any one of claims 1 to 7, wherein one end is supported by the main body portion of the first device cover, the one end extends in a curved shape covering the travel path, and the extended tip is a free end. Machine tool according to paragraph.

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