JP6534571B2 - Metal processing equipment and clamp jig - Google Patents

Description

  The present invention relates to, for example, a metal working apparatus and a clamp jig for forming a gear.

  A chain block for lifting a load is provided with various gears. In order to process such a gear, for example, a cutting apparatus such as a horizontal milling machine may be used. When processing gears in a horizontal milling machine, for example, a plurality of work pieces ring-shaped in the previous step are inserted from one end into a rod-like clamping jig called an arbor as shown in Patent Document 1, for example. Do. Then, after setting a plurality of works, a pressing member called a pressing piece is positioned on the other end side, and the pressing member is tightened and fixed by a nut.

  Also, a pullstat bolt is attached to one end of the clamp jig, and the pull stud bolt is clamped to the chuck mechanism of the horizontal milling machine. On the other hand, the other end side of the clamp jig is held by the centering block. In this state, while the gear cutter of the horizontal milling machine rotates, the gear cutter slides relative to the workpiece to cut the workpiece, thereby enabling the gear to be machined.

Patent No. 4889077

  By the way, in the above-described configuration, the work is manually set on the clamp jig, and then the nut is manually tightened with the push piece interposed. In addition, even after the processing of the work is finished, the nut is manually loosened and then the processed work is taken out. Therefore, processing of the work involves tightening and loosening of a nut, which requires much time and effort.

  The present invention has been made based on the above-described circumstances, and can reduce the number of metal processing apparatuses capable of reducing the number of man-hours when holding a work by a clamp jig, or can reduce the number of man-hours when holding a work It aims at providing a clamp jig.

  In order to solve the above problems, according to a first aspect of the present invention, there is provided a metal processing apparatus for metal processing a ring-like work, comprising: a table having a mounting surface; It has a work set part that can set a work, has a pull stud bolt on one end side of the work set part, and is inserted in a non-fastening state into a mounting shaft part on the other end side of the work set part A clamp jig provided with a push piece having a center hole having a center hole having a center coinciding with the rotation center, and at least a pair of temporary jigs installed on the mounting surface and on which the clamp jig is temporarily mounted. A chuck mechanism for holding one end side of the clamp jig by inserting the stand and the tip end side of the pull stud bolt, and contact with the push piece from the other end side of the clamp jig by the drive of the drive means And a centering block provided with a center member which is inserted into the center hole of the pressing piece to press the pressing piece, and a metal processing tool, which uses the metal processing tool to cut the work along the longitudinal direction or And a processing mechanism for grinding.

  Further, according to another aspect of the present invention, in the above-mentioned invention, the temporary holding base on one end side of the pair of temporary holding bases is one end side of the clamp jig when the pull stud bolt is held by the chuck mechanism. When the center member is inserted into the center hole and the push piece is pressed, the other end side of the clamp jig is raised by the second distance by one distance, and the other end side of the pair of temporary holder stands It is preferable that the height is raised.

  Furthermore, according to another aspect of the present invention, in the above-mentioned invention, it is preferable that the first distance and the second distance are more than 0 and not more than 1.0 mm.

  Further, according to another aspect of the present invention, in the above-mentioned invention, it is preferable that the temporary support be provided so as to be movable on the mounting surface of the table.

  Further, according to another aspect of the present invention, in the above-mentioned invention, the operation of the chuck mechanism and the operation of the drive means for driving the corestock are controlled by the control means, and the control means operates the chuck mechanism. After holding the pull stud bolt, it is preferable to operate the driving means of the corestock to press the pressing piece by the center member.

  According to the present invention, it is possible to reduce the number of man-hours for holding a work on a metal processing apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the whole structure of the cutting apparatus which concerns on one embodiment of this invention. It is a front view which shows the structure of the cutting apparatus shown in FIG. It is a block diagram which shows the structure of the control relationship of the cutting apparatus shown in FIG. It is a side view showing composition of a clamp jig concerning a 1 embodiment of the present invention. It is a side view which shows the state which set the workpiece | work to the clamp jig | tool of FIG. It is a sectional side view which shows the structure of the pushing piece attached to the clamp jig | tool of FIG. It is a front view which shows the structure of the temporary storage stand set to the table of the cutting apparatus of FIG. It is a bottom view which shows the structure of the temporary storage stand shown in FIG.

  Hereinafter, a cutting apparatus as a metal working apparatus according to an embodiment of the present invention will be described based on the drawings. The following description will be made using an XYZ orthogonal coordinate system as necessary. In the XYZ orthogonal coordinate system, the Z direction indicates the longitudinal direction of the table, the Z1 side indicates the right side in FIG. 1, and the Z2 side indicates the opposite side. Further, the width direction of the table is taken as the X direction, the X1 side points to the right side in FIG. 2, and the X2 side points to the opposite side. The Y direction indicates the vertical direction, the Y1 side indicates the upper side, and the Y2 side indicates the lower side opposite to that.

<1. About the overall configuration of the cutting device>
FIG. 1 is a side view showing the overall configuration of the cutting apparatus 10. As shown in FIG. FIG. 2 is a front view showing the configuration of the cutting apparatus 10. As shown in FIG. Moreover, FIG. 3 is a block diagram which shows the structure of the control relationship of the cutting apparatus 10. As shown in FIG. Note that FIG. 1 shows the cutting apparatus 10 appropriately omitted, and FIG. 2 also shows parts of the cutting apparatus 10 different from FIG. 1 appropriately omitted.

  Cutting apparatus 10 of the present embodiment is, for example, a bed-type horizontal milling machine capable of manual control or numerical control, and bed 20, column 21, head 22, main shaft 23, gear cutter 24, table 25, and The chuck mechanism 30, the centering stand 40, the control unit 50, the clamp jig 100, and the temporary placement stand 110 are main components.

  Although the clamp jig 100 and the temporary placement stand 110 are components of the cutting apparatus 10, they may be components other than the components of the cutting apparatus 10. Each part will be described below.

  The bed 20 is a portion installed at an installation site such as a floor, and the column 21 is a portion erected upward from the bed 20. The head 22 is attached to the column 21, and a main shaft 23 and a drive device (not shown) for driving the main shaft 23 are attached.

  Here, the column 21 is provided with a ball screw (not shown), and the guide portion of the head 22 is fitted in the ball screw. Further, in order to rotate the ball screw, a vertical drive motor 21a as shown in FIG. 3 is provided. The head 22 can be moved up and down by driving the up and down drive motor 21a.

  Further, in the present embodiment, the column 21 is movable in the X direction. In order to enable such movement, the bed 20 is provided with a ball screw (not shown), and the guide portion of the column 21 is fitted in the ball screw. In addition, a column drive motor 21b as shown in FIG. 3 is provided to rotate the ball screw. The column 21 can move in the X direction by driving the column drive motor 21b. The table 25 may be movable in the X direction without adopting such a configuration.

  The spindle 23 is provided horizontally to the table 25 in the present embodiment. The main shaft 23 is a shaft-shaped portion to which a gear cutter 24 for cutting is attached, and is rotated by driving of a main shaft drive motor 23a as shown in FIG. As a result, it is possible to cut the ring-shaped workpiece W to produce a gear.

  A machining mechanism for cutting the workpiece W is configured by the main spindle 23, the gear cutter 24, the head 22 and the like. The gear cutter 24 corresponds to a metal processing tool.

  The table 25 is attached to the top of the bed 20 and is movable in the Z direction with respect to the bed 20. Therefore, the bed 20 is provided with a ball screw (not shown), and the guide portion of the table 25 is fitted in the ball screw. Further, in order to rotate the ball screw, a table drive motor 25a as shown in FIG. 3 is provided. The table 25 is movable in the Z direction by driving the table drive motor 25a.

  The chuck mechanism 30 is a portion for holding the pull stud bolt 103 of the clamp jig 100. Further, the chuck mechanism 30 according to the present embodiment has a function of an indexing table, and can automatically rotate at a constant angle. Therefore, the chuck mechanism 30 is provided with a rotary motor 31 and a gear mechanism, and the work W can be rotated by a predetermined angle by operation of the rotary motor 31.

  The centering table 40 is provided with a guide portion 41 projecting downward, and the guide portion 41 is fitted in a guide groove (not shown) extending in the longitudinal direction (Z direction) of the table 25. Thus, the centering table 40 is movable along the longitudinal direction (Z direction). In the present embodiment, the centering table 40 is automatically movable, and in order to enable such movement, a ball screw (not shown) or its ball screw is rotated. A motor or the like is provided on the table 25 side. Further, the core pressing stand 40 is provided with a fitting portion to be fitted with a ball screw. Therefore, when the ball screw is rotated by the drive of the slide motor 42, the centering block 40 is movable in the longitudinal direction (Z direction). The slide motor 42 corresponds to a drive unit.

  A pointed center member 43 is provided on the centering block 40. The center member 43 is a portion to be fitted into a center hole 105a of a push piece 105 described later, whereby the core pusher 40 enables the push piece 105 to be firmly pushed.

<2. About clamp jig>
Subsequently, the clamp jig will be described. FIG. 4 is a side view showing the configuration of the clamp jig 100. As shown in FIG. FIG. 5 is a side view showing a state in which the work W is set in the clamp jig 100. As shown in FIG. As shown in FIGS. 4 and 5, the clamp jig 100 includes a work setting portion 101, a chuck holding portion 102, a pull stud bolt 103, a mounting shaft portion 104, and a pressing piece 105. The work setting unit 101 is a shaft-shaped portion in which a plurality of ring-shaped works W are set. For example, the work setting unit 101 can set dozens of works W in close contact with each other.

  When the number of works W set in the work setting unit 101 is small, it is possible to set a spacer in the work setting unit 101.

  The chuck holding portion 102 is a portion held by the above-described chuck mechanism 30, and has a tapered portion 102a, a pulley-like portion 102b, and a work engagement portion 102c. Among these, the taper part 102a is a part which has an outer peripheral surface inclined so that it may become small diameter as it goes to a front end side (Z1 side). The pulley-like portion 102b has a pulley-like appearance and has a recess 102b2 surrounded by two annular protrusions 102b1. The movement of the clamp jig 100 is restricted by the positioning of the other member in the recess 102 b 2, whereby the clamp jig 100 is held.

  Further, the work engagement portion 102c is a portion having a diameter larger than that of the work set portion 101 but smaller than that of the pulley-like portion 102b. The work engagement portion 102c is a portion to be placed on a temporary support 110 described later. The workpiece locking portion 102c may be omitted, and instead, the annular convex portion 102b1 of the pulley-like portion 102b may be mounted on the temporary holder 110.

  In addition, the chuck holding portion 102 is provided with a screw hole (not shown). An external thread (not shown) of the pull stud bolt 103 is screwed into this screw hole. Thereby, the pull stud bolt 103 is attached to the chuck holding portion 102. The chuck holding portion 102 is a portion fixed by the above-described chuck mechanism 30. At the time of fixing, first, the pull stud bolt 103 is drawn in by the drawing mechanism (not shown) of the chuck mechanism 30, and thereafter, the outer peripheral surface of the pulley-like portion 102b abuts on the recess of the chuck mechanism 30 to perform positioning. .

  Further, the mounting shaft portion 104 is provided on the other end side (Z2 side) of the work setting portion 101. The mounting shaft portion 104 is inserted into the insertion hole 105 b of the push piece 105. Thus, the push piece 105 is attached to the attachment shaft portion 104. At this time, the push piece 105 contacts the workpiece W located closest to the other end (Z2 side).

  FIG. 6 is a side sectional view showing the configuration of the pressing piece 105. As shown in FIG. As shown in FIG. 6, the push piece 105 is formed by cutting the center hole 105 a and the insertion hole 105 b in a cylindrical member. The center hole 105a is located on the other end side (Z2 side) of the push piece 105 in the configuration shown in FIG. 4 and FIG. The center hole 105a is a portion into which the above-described pointed center member 43 is inserted. By inserting the center member 43, positioning of the clamp jig 100 and clamping of the clamp jig 100 are performed. Further, the center of the center hole 105 a is provided so as to coincide with the rotation center of the pressing piece 105, and also provided so as to coincide with the rotation center of the work W set in the work setting portion 101.

  Further, the insertion hole 105 b is a portion into which the mounting shaft portion 104 described above is inserted. However, in order to suppress the rattling of the both, the diameter of the insertion hole 105b has a dimensional difference with respect to the diameter of the mounting shaft portion 104, for example, equal to or less than the fitting tolerance as a clearance fit.

  Also, a friction surface 105 c is provided on the end face of one end side of the pressing piece 105. The friction surface 105 c is a portion in contact with the workpiece W positioned closest to the other end, and is a portion that applies a frictional force to the workpiece W at that time. The friction surface 105 c may be, for example, knurled, or may be in a state where ring-shaped irregularities are not removed during cutting with a lathe, for example. In addition, the friction surface 105c may be flat so as to have no unevenness.

  In addition, as shown in FIG. 1, the pushing piece 105 is mounted in the temporary storage stand 110 mentioned later. Therefore, the outer diameter of the push piece 105 is provided to be equal to the outer diameter of the work engagement portion 102c. The push piece 105 is a component of the clamp jig 100. However, the push piece 105 may be a component other than the clamp jig 100.

  In addition, the control unit 50 is a part that controls each operation part of the cutting apparatus 10, and in the part where such control is performed, the vertical drive motor 21a, the column drive motor 21b, the spindle drive motor 23a, and the table drive There is a motor 25 a, a rotary motor 31 and a slide motor 42. The control unit 50 is a microcomputer including, for example, a CPU and a memory storing a control program and data, and can appropriately control the operation of each drive portion. The control unit 50 corresponds to control means.

<3. About temporary holding table>
Next, the temporary holder will be described. FIG. 7 is a front view showing the configuration of the temporary holder 110. As shown in FIG. FIG. 8 is a bottom view showing the configuration of the temporary holder 110. As shown in FIG. As shown in FIGS. 7 and 8, the temporary holding table 110 is a portion for temporarily mounting the clamp jig 100, and is mounted on the table 25 of the cutting apparatus 10 as shown in FIG. 1. Be placed. Further, in the configuration shown in FIG. 1, a pair of temporary holders 110 is provided on the table 25. As shown in FIGS. 7 and 8, the temporary placement table 110 has a configuration in which a placement recess 111 is provided for a metal block-like or thick-plate-like member. The placement recess 111 is a portion for placing the work engagement portion 102 c of the clamp jig 100 and the push piece 105. Although temporary holder 110 in the present embodiment can slide easily by sliding in the horizontal plane (in the ZX plane) along the mounting surface of table 25, it is not movable. May be fixed.

  Here, when the clamp jig 100 is placed on the placement recess 111, the dimensional relationship is as follows. That is, when the chuck mechanism 30 pulls in and holds the pull stud bolt 103 in a state where the clamp jig 100 is mounted on the mounting recess 111, the work locking portion 102 c of the clamp jig 100 at one end side is the mounting recess 111. A first distance above the outer wall of the Thereafter, when the centering block 40 moves toward one end side and the center member 43 is inserted into the center hole 105a in a pressed state, the push piece 105 is the outer wall surface of the mounting recess 111 of the temporary holder 110 on the other end side. From the second distance.

  The dimension of the floating (the dimensions of the first distance and the second distance) can be, for example, more than 0 mm and 1.0 mm or less. If it exceeds 1.0 mm, it is difficult to pull in the pull stud bolt 103 smoothly. The first distance and the second distance may be equal to or different from each other.

<4. About processing method to form gear from work W>
Subsequently, a method of processing the workpiece W to form various gears will be described. First, the workpiece W is set to the clamp jig 100. At this time, the push piece 105 is removed from the mounting shaft portion 104. Then, the work setting portion 101 is inserted into the ring hole of the ring-shaped workpiece W, and a plurality of workpieces W are in close contact with each other.

  Next, the mounting shaft portion 104 is inserted into the insertion hole 105 b of the push piece 105. At this time, the push piece 105 is not fixed by a screw or the like. Therefore, the push piece 105 is provided movably with respect to the mounting shaft portion 104. That is, the push piece 105 is attached to the attachment shaft portion 104 in a non-fixed state.

  In addition to setting the workpiece W in the clamp jig 100, the temporary placement stand 110 is previously installed at a predetermined position with respect to the table 25 of the cutting apparatus 10. Then, after the work W is set in the clamp jig 100, the clamp jig 100 is placed on the placement recess 111 of the temporary holding table 110.

  Next, the pull stud bolt 103 side of the clamp jig 100 is pulled in by a pulling mechanism (not shown) of the chuck mechanism 30. At this time, by inserting a part of the pull stud bolt 103 into the insertion portion (not shown) of the chuck mechanism 30, the pull stud bolt 103 is pulled in by the chuck mechanism 30, and one end side of the clamp jig 100 is chucked. . In addition, when one end side of the clamp jig 100 is chucked, the clamp jig 100 at one end side is lifted from the outer wall surface of the placement recess 111.

  Subsequently, the control unit 50 operates the slide motor 42 of the corestock 40 to slide the corestock 40 toward the one end side (Z1 side). Then, the center member 43 is inserted into the center hole 105 a of the push piece 105, and in this state, the center member 43 further pushes the push piece 105. Thereby, the center member 43 firmly pushes the push piece 105, and the push piece 105 pushes the work W by the push. For this reason, even when the push piece 105 is not fixed by a screw or the like, the work W can be fixed by the clamp. As an example, the center member 43 may press the pressing piece 105 with a pressing force of about 400 kg.

  After this, the workpiece W is cut. At this time, the table drive motor 25a is driven to adjust the position of the table 25 in the Z direction, and the column drive motor 21b is driven to adjust the position of the column 21 in the X direction. In this state, the gear cutter 24 is rotated by driving the spindle drive motor 23 a to rotate the spindle 23. In that state, the vertical drive motor 21a is driven to move the table 25 by moving the table 25 by moving the table 25 by moving the table 25 by moving the table 25 by moving the table 25 with the gear cutter 24 so that grooves are formed. Be done.

  Thereafter, the rotary motor 31 of the chuck mechanism 30 is operated to rotate the work W by an amount corresponding to the gear pitch. Then, after that, the table drive motor 25a is driven again to adjust the position of the table 25 in the Z direction, and the same process of cutting the workpiece W is repeated. Thus, it is possible to form a gear by cutting a plurality of works W.

<5. About the effect>
According to the cutting apparatus 10 and the clamp jig 100 configured as described above, the clamp jig 100 includes the work setting unit 101, and a plurality of works W can be set in the work setting unit 101. Further, the chuck mechanism 30 is provided with a pull stud bolt 103 to be chucked, and further, a push piece 105 to be inserted into the mounting shaft portion 104 in a non-fastened state is provided. Further, the table 25 is provided with a pair of temporary holding bases 110 on which the clamp jig 100 is temporarily placed. Then, one end side of the clamp jig is held by the chuck mechanism 30, and the center member 43 is further inserted into the center hole 105a of the push piece 105, whereby the clamp jig 100 is held.

  By adopting such a configuration, after setting the plurality of works W with respect to the clamp jig 100, an operation of tightening with a nut is not necessary so that the push piece 105 is not detached. Therefore, it is possible to reduce the number of steps required to fasten the nut, and the work of holding the plurality of works W in the clamp jig 100 is facilitated. Further, as described above, since the operation of tightening with a nut is not necessary, the operation of setting the heavy clamp jig 100 (arbor) holding the plurality of works W in the cutting apparatus 10 is facilitated.

  Further, as described above, since the push piece 105 is not tightened by the nut, the push piece 105 can be easily removed from the mounting shaft portion 104 after the cutting of the plurality of works W is completed. Therefore, it is possible to reduce the time and effort of removing the work W after processing from the clamp jig 100.

  Further, in the present embodiment, when the pull stud bolt 103 is pulled in by the chuck mechanism 30 and the one end side of the clamp jig 100 is held, the clamp jig is only the first distance from the temporary placement stand 110 at one end side. It is provided in a floating positional relationship. In addition, when the center member 43 is inserted into the center hole 105a and the push piece 105 is pressed, the other end of the clamp jig 100 is provided in a positional relationship in which the second end floats up from the temporary holder 110 by the second distance. ing. Therefore, the workpiece W can be in a state where it does not contact other members other than the clamp jig 100. Therefore, even if the work W is cut using the gear cutter 24 while rotating the work W by the amount corresponding to the gear pitch, it is possible to prevent positional deviation of the work W. In addition, when the clamp jig 100 is clamped between the chuck mechanism 30 and the core pressing stand 40, the position of the clamp jig 100 in the vertical direction (Y direction) is determined. Therefore, the cutting process for forming the gear can be performed on the workpiece W in a state in which the vertical direction is accurately positioned.

  Furthermore, in the present embodiment, the above-described first distance and second distance are greater than 0 and equal to or less than 1.0 mm. Therefore, when pulling in the pull stud bolt 103 by the chuck mechanism 30, it is possible to pull in smoothly with a small positional deviation.

  Further, in the present embodiment, the temporary holder 110 is provided movably on the mounting surface of the table 25. Therefore, it is possible to flexibly cope with the clamp jigs 100 of various lengths. In addition, since the temporary holding table 110 can be moved by sliding on the mounting surface to set the clamp jig 100 or remove the clamp jig 100, a heavy clamp that holds a plurality of works W Handling of the tool 100 (Arber) is facilitated.

  Further, in the present embodiment, the control unit 50 controls the operation of the chuck mechanism 30 and the operation of the slide motor 42 that drives the centering block 40. In addition, after the control unit 50 operates the chuck mechanism 30 to hold the pull stud bolt 103, the control unit 50 operates the slide motor 42 of the centering block 40 to press the pressing piece 105 with the center member 43. There is. Therefore, both end sides of the clamp jig 100 can be reliably held. Therefore, even if the pressing piece 105 is not fastened by a bolt, a nut, or the like, a plurality of works W can be held, and a gear can be manufactured by cutting the works W.

<15. Modified example>
As mentioned above, although each embodiment of this invention was described, this invention can be variously deformed besides this. Below, we will discuss that.

  In the above-described embodiment, the clamp jig 100 is placed on the placement recess 111 of the pair of temporary placement bases 110 by the work engagement portion 102 c and the push piece 105. However, a configuration in which the work W is placed on the placement recess 111 of the clamp jig 100 may be adopted.

  Moreover, in the above-mentioned embodiment, the mounting recessed part 111 is provided in a pair of temporary mounting base 110. As shown in FIG. However, the pair of temporary mounting bases 110 may be provided with projecting portions for blocking the movement of the clamp jig 100, and the clamp jig 100 may be held thereby.

  Further, in the above-described embodiment, a pair of temporary holding bases 110 is provided, but a configuration in which three or more temporary holding bases 110 are provided may be employed.

  Furthermore, in the above-described embodiment, the cutting apparatus 10 is, for example, a bed-type horizontal milling machine. However, the cutting device 10 may be a knee-type horizontal milling machine. In addition, the cutting apparatus 10 applies the present invention to a bed type vertical milling machine, a knee type vertical milling machine, a gate type milling machine, a forming machine, a planing machine, a vertical cutting machine, a machining center, and various other machine tools. It is possible.

  Moreover, in the above-mentioned embodiment, the cutting apparatus 10 as a metal processing apparatus is demonstrated. However, the metal processing apparatus is not limited to the cutting apparatus 10. For example, the present invention can be applied to metal processing devices other than cutting devices, such as a grinding device for grinding a workpiece. In the case of a grinding apparatus, the processing mechanism performs grinding.

  Further, in the above-described embodiment, a configuration in which the work W is directly fixed by the push piece 105 is disclosed. However, between the work W and the press piece 105, a member for adjusting the space such as a collar may be appropriately disposed.

DESCRIPTION OF SYMBOLS 10 Cutting device (corresponding to metal processing device) 20 Bed 21 column Column 21a vertical drive motor 21b column drive motor 22 Head (corresponding to a part of processing mechanism) spindle 23 spindle 23a: spindle drive motor, 24: gear cutter (part of machining mechanism, corresponding to metal working tool), 25: table, 25a: table drive motor, 30: chuck mechanism, 31: rotation Motors 40: Mandrels, 42: Slide motors (corresponding to driving means), 43: Center members, 50: Control parts (corresponding to control means), 100: Clamp jig, 101: Work setting part, 102: Chuck Holding part, 102a ... taper part, 102b ... pulley part, 102b 1 ... annular convex part, 102b 2 ... concave part, 102c ... work engagement part, 103 ... pull stud bolt, 04 ... mounting shaft portion, 105 ... pressing piece, 105a ... center hole, 105b ... insertion hole, 105c ... friction surface 110 ... temporary placement table, 111 ... loading recess, W ... workpiece

Claims (5)

A metal processing apparatus for metal processing a ring-shaped workpiece,
A table having a mounting surface,
A work set portion capable of setting a plurality of the works along the longitudinal direction, having a pull stud bolt on one end side of the work set portion, and non-fastening on a mounting shaft portion on the other end side of the work set portion A clamping jig provided with a pushing piece having a center hole having a center which is inserted in a state to hold the work and which has a center coinciding with the rotation center;
At least a pair of temporary holders, which are installed on the mounting surface and on which the clamping jig is temporarily mounted;
A chuck mechanism for holding one end side of the clamp jig by inserting the leading end side of the pull stud bolt;
A centering stand provided with a center member that contacts with and moves away from the other end of the clamp jig from the other end of the clamp jig by driving of the driving means, and is inserted into the center hole of the pressing block to press the pressing piece When,
A processing mechanism including a metal processing tool for cutting or grinding the workpiece along the longitudinal direction using the metal processing tool;
A metal processing apparatus comprising: When the pull stud bolt is held by the chuck mechanism, one end side of the clamp jig is lifted by a first distance between the temporary holder on one end side of the pair of temporary holders.
When the center member is inserted into the center hole and the pressing piece is pressed, the other end side of the clamp jig has the second distance between the temporary holding bases on the other end side of the pair of temporary holding bases. It has become only the height to rise,
The metal processing apparatus according to claim 1, wherein The first distance and the second distance are greater than 0 and not more than 1.0 mm.
The metal processing apparatus according to claim 2, characterized in that: The temporary holder is provided movably on the mounting surface of the table,
The metal working apparatus according to any one of claims 1 to 3, characterized in that. The operation of the chuck mechanism and the operation of the drive means for driving the wicking stand are controlled by control means, and
The control means operates the chuck mechanism to hold the pull stud bolt, and then operates the driving means of the core support to press the pressing piece with the center member.
The metal working apparatus according to any one of claims 1 to 4, characterized in that.

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