JP2006110699A - Cylindrical gear grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify constitution of a cylindrical gear grinder to grind a gear to be ground by generating grinding. <P>SOLUTION: A work piece spindle stock 12 holding a work piece spindle 26 free to rotate around a rotating axis in parallel in the vertical direction. A grindstone spindle stock 44 holding a grindstone spindle 86 free to rotate around a rotating axis extending in the cross direction is moved in the longitudinal and cross directions and revolved around a revolving axis in parallel in the longitudinal direction. The work piece spindle stock 12 is provided on the front side of the grindstone spindle stock 44, and a dresser base 110 is fixed on its left side surface. A relative position of a grindstone 90 and the gear to be ground 32 is adjusted by relative movement of the grindstone spindle stock 44 and the work piece spindle stock 12, and the grindstone 90 is made to grind the gear to be ground 32 by generating generating grinding motion by synchronous rotation of the grindstone spindle 86 and the work piece spindle 26. Dressing is carried out by making a dresser 112 and the grindstone 90 both rotating contact with each other and giving dressing motion in the cross direction synchronous with rotation of the grindstone 90 to the grindstone spindle stock 44. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cylindrical gear grinder, and more particularly to a cylindrical gear grinder having a dresser and a function of dressing a grindstone.

A cylindrical gear grinder having a grinding wheel dressing function is widely known, for example, as described in Patent Document 1 below. The grindstone used for grinding in the cylindrical gear grinding machine described in Patent Document 1 includes grinding teeth having a shape corresponding to the tooth profile of the gear to be ground, and grinds the teeth of the gear to be ground one by one. The teeth of the gear to be ground are ground by so-called forming grinding. The grinding teeth of this grindstone are formed by dressing. Therefore, the grindstone spindle that holds the grindstone spindle rotatably around the horizontal rotation axis is moved in the vertical direction and the horizontal direction perpendicular to the rotation axis of the grindstone spindle by the grindstone spindle moving device, and the horizontal movement direction Is swiveled around a swivel axis parallel to. In addition, the dresser base that rotatably holds the dresser shaft is moved in a direction parallel to the rotation axis of the grindstone by the work spindle support moving device together with the work spindle main body that rotatably holds the work spindle. And tilted about an axis parallel to the vertical direction. The dresser shaft and the workpiece spindle are each rotated around a rotation axis parallel to the vertical direction by a rotary drive device, and the horizontal and vertical movements and rotations of the grindstone, and the horizontal movement and tilt of the dresser. With the combination, the dressing is applied to the grindstone by the dresser.
JP 2000-108028 A

  The present invention has been made in the background of the above circumstances, and it is an object to simplify the configuration of a cylindrical gear grinding machine having a grinding wheel dressing function while grinding the teeth of a gear to be ground by so-called generating grinding. To do.

In order to solve the above-described problems, a cylindrical gear grinding machine according to the present invention includes (A) a workpiece spindle stock that holds a workpiece spindle that holds a workpiece gear rotatably around a rotation axis, and ( B) A grindstone spindle that holds a grindstone that is generally cylindrical and that has a grindstone with helical grinding teeth on its outer peripheral surface, and that is rotatably held around the rotation axis, and (C) the workpiece spindle stock. A relative movement device that relatively moves a grindstone spindle to align the grindstone and the gear to be ground; (D) a workpiece spindle rotation device that rotationally drives the workpiece spindle; and the grindstone spindle A grinding wheel spindle rotating device that rotationally drives the wheel and a synchronous control device that controls both of the rotating devices synchronously, and a generating grinding motion applying device that applies a generating grinding motion to the grinding wheel and the gear to be ground, and (E) a dresser The dresser shaft that holds the A dresser base that is rotatably held; and (F) a dresser shaft rotating device that rotationally drives a dresser shaft, and the dresser base is fixed to the work spindle, and the relative movement device Relative alignment with the grinding wheel and application of a dressing motion are performed.
In the relative movement device, (a) the grindstone headstock is swung around a swivel axis perpendicular to the rotation axis of the grindstone spindle, and moved in the X-axis direction parallel to the swivel axis and the Z-axis direction perpendicular to the swivel axis. A grindstone spindle moving device, and (b) a workpiece spindle moving device that moves the workpiece spindle in the Y-axis direction perpendicular to the X-axis direction and the Z-axis direction and parallel to the workpiece spindle. Can be included.
In a cylindrical gear grinding machine as viewed from the front side, the X-axis direction is the front-rear direction, the Y-axis direction is the up-down direction, and the Z-axis direction is the left-right direction. The grindstone is held at the tip portion projecting toward the workpiece, the workpiece spindle is provided on the front side of the grindstone spindle, and the dresser platform is the other of the right and left of the workpiece spindle Attached to the side.
The dresser base is preferably attached to the work spindle base via a posture adjusting device that adjusts a posture around a rotation axis parallel to the Y-axis direction.

In the cylindrical gear grinding machine according to the present invention, the relative position of the workpiece and the grindstone is adjusted by the relative movement device, and the creation grinding motion is given by the creation grinding motion imparting device and part of the relative movement device. The workpiece and the grindstone are relatively moved in the axial direction of the workpiece, and the teeth of the gear to be ground are ground by the grinding teeth of the grindstone. For this reason, the grinding teeth of the grindstone are assumed to have a spiral shape, but the cross-sectional shape is simpler than the grinding teeth of the grindstone that performs forming grinding. For example, it may be trapezoidal, and the dresser may have a simple shape such as a truncated cone. The dresser base on which the dresser shaft to which the dresser is attached is rotatably held and the grindstone headstock are moved relative to each other by a relative movement device that performs relative positioning of the grindstone and the gear to be ground. Positioning is performed, the dresser is rotated by the dresser shaft rotating device, and dressing motion is applied to the dresser and the grindstone by the relative moving device to perform dressing.
Thus, in this cylindrical gear grinding machine, since the dresser base is fixed to the work spindle head, the occupied space is small compared to the case where the dresser base is provided independently, and the cylindrical gear for generating grinding is performed. The grinding machine can be miniaturized. In addition, a dedicated dresser table moving device for moving the dresser table is unnecessary, and the cylindrical gear grinding machine can be configured simply and inexpensively. For example, when the dresser base is provided so as to be movable with respect to the grinding gear together with the grindstone headstock, in addition to the device for moving the grindstone headstock and the work piece headstock relative to each other, the dresser base is set before starting dressing. A dresser base moving device for moving the wheel head spindle relative to each other and aligning the dresser and the grindstone relative to each other is necessary, and the configuration is complicated, and the cylindrical gear grinder becomes large. On the other hand, in the cylindrical gear grinding machine according to the present invention, the relative movement device that relatively moves the work spindle and the grindstone spindle serves as the device that relatively moves the dresser table and the grindstone spindle, A small and inexpensive cylindrical gear grinding machine with a small number of parts can be obtained.
When the relative moving device includes a grindstone headstock moving device and a work piece headstock moving device, the relative inclination of the grinding wheel tooth and the gear tooth to be ground is adjusted by turning the grindstone headstock, The relative position of the workpiece spindle and the grinding wheel spindle in the X-axis, Y-axis, and Z-axis directions orthogonal to each other aligns the relative positions of the grinding wheel and the grinding wheel, and the grinding of the machining gear is performed by generating grinding motion. Is called.
The “front of the cylindrical gear grinder” is the surface on which the operator mainly accesses the cylindrical gear grinder, and in many cases, the door is provided on the front side of the cover that covers the cylindrical gear grinder so that it can be opened and closed. A person can open the door to access the device inside the cover. The work piece headstock is provided on the front side of the grindstone headstock, and the distance between the operator on the front side and the work piece headstock is short. For example, the work gear can be attached to or removed from the work piece main shaft. It can be done easily and quickly. In addition, when the dresser base is attached to the work spindle, the distance between the worker on the front side and the dresser base is short, regardless of whether the dresser base is attached to the left or right side of the work spindle. A person can easily and quickly perform operations such as maintenance and changeover. For example, when the type of cylindrical gear produced in the cylindrical gear production line changes, and a setup change that changes and adjusts the grindstone and dresser according to the type of cylindrical gear in the cylindrical gear grinding machine constituting the production line, Along with the replacement of the grindstone, it is possible to easily perform dresser replacement, relative positioning between the dresser and the grindstone, and the like.
Furthermore, in a cylindrical gear grinding machine including an attitude adjustment device, for example, by adjusting the attitude around the rotation axis parallel to the Y-axis direction of the dresser, for example, dimensional errors or assembly errors of components of the cylindrical gear grinding machine, etc. The relative position error between the dressing surface of the dresser and the grinding surface of the grindstone can be reduced, and dressing accuracy can be improved. As a result, it is possible to provide a gear with high accuracy and low operating noise at low cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention can be implemented in a mode in which various modifications are made based on the knowledge of those skilled in the art, in addition to the following examples.

  FIG. 1 schematically shows a cylindrical gear grinding machine according to an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a bed. A workpiece spindle stock 12 is provided on the bed 10, and is moved in the Y-axis direction by the workpiece spindle stock moving device 16 (see FIG. 3) while being guided by the guide device 14. In this embodiment, the Y-axis direction is the vertical direction. In this embodiment, the guide device 14 is a ball spline guide device including a spline bar 18 as a pair of guide members, a spline nut (not shown) as a guided member, and a plurality of balls (not shown). Has been. The pair of spline bars 18 are erected on the bed 10 side by side in the Z-axis direction. The Z-axis direction is a horizontal direction, which is the left-right direction when the cylindrical gear grinding machine is viewed from the front side. The front surface of the cylindrical gear grinder is a side on which an operator mainly accesses the cylindrical gear grinder. In the present cylindrical gear grinder, the side facing the workpiece spindle stock 12 (the front surface of the workpiece spindle stock 12 is the front). The side opposite to the front side is the front side and the front side. This cylindrical gear grinder is covered with a cover (not shown), and a door is provided on the cover so that the door can be opened and closed, so that an operator can open the door and work on various devices of the cylindrical gear grinder. However, the door is provided in the front side portion of the cover, and the operator can easily access the work spindle stock 12. It can also be said that a door is provided on the side accessed mainly by the worker, and the side on which the door is provided is the front side. The spline nut is attached to the work spindle stock 12 and holds the ball in a circulatory manner and is fitted to the spline bar 18 to guide the work spindle stock 12 to move up and down together with the spline bar 18. In this way, if the guide device 14 is a ball spline guide device, the spline nut and the spline bar 18 can be easily fitted with high precision, and the work piece can be processed with the spline nut fitted to the spline bar 18. What is necessary is just to fix to the headstock 12, and it becomes unnecessary to perform the operation | work of a guide rail and a slide at the time of manufacture of a cylindrical gear grinding machine, and it can manufacture easily. The same applies to a guide device constituted by a linear guide device to be described later.

  The workpiece spindle stock 12 holds the workpiece spindle 26 so as to be rotatable about a rotation axis parallel to the vertical direction, and the workpiece spindle stock moving device 16 has a vertical movement motor (not shown). It is configured as a drive source, and the workpiece spindle stock 12 is moved to an arbitrary vertical position parallel to the workpiece spindle 26. The workpiece main shaft 26 includes a workpiece holding portion 28, and holds the grinding gear 32 as a workpiece in a posture in which the axis is parallel to the vertical direction in cooperation with the tail pushing member 30. The gear 32 to be ground is, for example, a spur gear which is a kind of cylindrical gear, and has a plurality of teeth 34 extending on the outer peripheral surface thereof in parallel to the axis. The workpiece spindle 26 is rotationally driven by a workpiece spindle rotating device 38 (see FIG. 3). The workpiece rotating device 38 uses a workpiece rotating motor (not shown) as a drive source, and rotates the workpiece main shaft 26 in both forward and reverse directions by an arbitrary angle.

  The bed 10 is provided with a grindstone spindle 44 adjacent to the workpiece spindle 12 in the X-axis direction and is moved by a grindstone spindle moving device 46. The X-axis direction is a horizontal direction perpendicular to the Y-axis direction and the Z-axis direction, and is the front-rear direction. The grindstone spindle 44 is provided on the rear side of the workpiece spindle stock 12, and the workpiece spindle stock 12 is provided on the front side of the grindstone spindle 44. In the present embodiment, the direction in which the workpiece spindle stock 12 and the grindstone spindle stock 44 are aligned is the front-rear direction, the workpiece spindle stock 12 side is the front side of the cylindrical gear grinder, and the workpiece spindle stock 12 is It is provided in the front part of the cylindrical gear grinding machine. The grindstone spindle head moving device 46 includes a grindstone headstock front / rear direction moving device 48, a grindstone head stock turning device 50, and a grindstone head stock left / right direction moving device 52. The grindstone spindle head front / rear direction moving device 48 includes a front / rear direction moving table 56 and a front / rear direction moving table driving device 58 (see FIG. 3). The front-rear direction moving table 56 is provided on the bed 10 so as to be movable in the front-rear direction by being guided by the guide device 60. In this embodiment, the guide device 60 is constituted by a linear guide device, and a guide rail 62 as a pair of guide members provided in parallel in the front-rear direction, and a pair of movably fitted to the guide rail 62. The slider includes a slider (not shown) as a guided member and a ball (not shown) held by the slider so as to be able to circulate, and the front / rear moving table 56 is movably fitted to the guide rail 62 while holding the slider. ing. The front-rear direction moving table driving device 58 uses a front-rear direction moving motor (not shown) as a drive source, and moves the front-rear direction moving table 56 to an arbitrary position in the front-rear direction.

  A grindstone spindle turning device 50 is provided on the longitudinal moving table 56. The grindstone spindle turning device 50 includes a turning table 66 and a turning table drive device 68 (see FIG. 3). The swivel base 66 is provided on the front-rear direction moving base 56 so as to be rotatable around a rotation axis parallel to the front-rear direction. The swivel base drive device 68 uses a grindstone head stock turn motor (not shown) as a drive source, and rotates the swivel base 66 in both forward and reverse directions at an arbitrary angle.

  The grindstone spindle head lateral movement device 52 is provided on the swivel base 66. The grindstone spindle left / right movement device 52 includes a left / right movement table 74 and a left / right movement table drive device 76 (see FIG. 3). The left-right moving table 74 is provided on the swivel table 66 by a guide device 78 so as to be movable in the left-right direction. The guide device 78 is a linear guide device similar to the guide device 60, and includes a pair of guide rails 80, a slider and a ball (not shown), and the left-right moving base 74 holds the slider and guide rails. 80 is movably fitted. The left / right moving table drive device 76 uses a left / right moving motor (not shown) as a drive source, and moves the left / right moving table 74 to an arbitrary position in the left / right direction.

  The grindstone head stock 44 is provided on the left-right moving table 74. The grindstone spindle 44 holds the grindstone spindle 86 so as to be rotatable around a rotation axis parallel to the left-right direction. In the present embodiment, the grindstone spindle 86 is viewed from the front side when the cylindrical gear grinder is viewed from the right side. The grindstone 90 is held at the projected tip portion. The grindstone 90 has a generally cylindrical shape and is provided with helical grinding teeth 92 on the outer peripheral surface. In the grindstone 90, the grinding teeth 92 may be a grindstone having a plurality of teeth, or may be a grindstone having a single tooth. The grindstone spindle 86 is rotationally driven by a grindstone spindle turning device 94 (see FIG. 3). The grinding wheel spindle rotating device 94 uses a grinding wheel spindle rotating motor as a drive source. The grindstone spindle 44 is swung around a swivel axis parallel to the front-rear direction and orthogonal to the rotation axis of the grindstone spindle 86 extending in the left-right direction by the rotation of the swivel base 66, and the grindstone main-spindle front-rear direction moving device 48 and the grindstone headstock horizontal movement device 52 are moved in the front-rear direction parallel to the turning axis and in the right-left direction perpendicular thereto. Further, the vertical direction, which is the moving direction of the workpiece spindle stock 12, is perpendicular to the front-rear direction and the left-right direction, and the relative movement device that relatively moves the workpiece spindle stock 12 and the grindstone spindle 44 is a grindstone spindle. A platform moving device 46 and a work spindle stock moving device 16 are included.

  As shown in FIG. 1, when the cylindrical gear grinding machine is viewed from the front side, a dresser base 110 is provided on the left side surface of the workpiece spindle stock 12 and on the side surface on which the grindstone spindle 86 is projected. As shown in FIG. 2, the dresser shaft 114 that holds the dresser 112 is rotatably held around a rotation axis parallel to the left-right direction. In this embodiment, as shown in FIG. 2, the dresser base 110 is attached to the work spindle 12 via the attitude adjustment device 120, and the attitude around the rotation axis parallel to the Y-axis direction is adjusted. . The posture adjusting device 120 is extended from the workpiece head stock 12 to the left when the cylindrical gear grinding machine is viewed from the front side, and is detachably fixed to the workpiece stock stock 12 so as to be supported or attached. The cylindrical gear grinder is arranged in a vertical plane that includes a support shaft 126 erected in the vertical direction on the support member or mounting member 122 that constitutes the portion and the axis of the support shaft 126 and is parallel to the rotational axis of the grindstone 90. And a bolt 128 which is a kind of a fixing device standing upright from the axis of the support shaft 126 as viewed from the front side. The dresser base support member 130 is supported by the support shaft 126 so as to be rotatable about an axis parallel to the vertical direction, and is moved relative to the shaft portion of the bolt 128 in the elongated hole 132 along the longitudinal direction of the elongated hole 132. It can be fitted. The elongated hole 132 has a partial arc shape centering on the axis of the support shaft 126.

  The dresser base support member 130 is protruded from the work spindle 12 to the grindstone spindle 44 side, and the dresser base 110 is detachably fixed to the protruding portion. In this embodiment, a pair of dressers 112 are provided and are held by dresser shafts 114, respectively. Each of these dressers 112 has a frustoconical shape, and includes a frustoconical dressing surface 140 centered on the rotational axis thereof. The two dresser shafts 114 are held concentrically by the dresser base 110 so as to be rotatable around a rotation axis parallel to the left-right direction, and the dresser 112 is provided at the end of the dresser shafts 114 facing each other. The dressing surface 140 is held in such a direction that the diameter increases as they approach each other. Each of the two dresser shafts 114 is rotationally driven by a dresser shaft rotating device 142. The dresser shaft rotating device 142 uses a dresser shaft rotating motor as a drive source.

  The cylindrical gear grinding machine is controlled by a control device 150 shown in FIG. The control device 150 mainly includes a CPU 152, a ROM 154, a RAM 156, and a computer 160 including a bus connecting them. An input / output interface 164 is connected to the computer 160, and the workpiece spindle stock moving device 16 and the like are controlled via a drive circuit 166. The motor constituting the drive source of the workpiece head moving device 16 or the like is a kind of actuator, and in this embodiment, is an electric rotary motor that is a kind of electric motor, and accurately controls the rotation angle. It is a servo motor that is a kind of electric motor that can be used, and is a servo motor with an encoder. A step motor may be used instead of the servo motor. The ROM 154 stores various programs and data, such as a program for grinding the teeth 34 of the gear to be ground 32, a program for dressing the grindstone 90, and the like.

  In the cylindrical gear grinding machine configured as described above, the teeth 34 of the gear to be ground 32 are ground by the grinding teeth 92 of the grindstone 90. At this time, the to-be-ground gear 32 is held by the workpiece spindle 26, the grindstone 90 is held by the grindstone spindle 86, and the grindstone spindle 44 is turned by the grindstone spindle turning device 50, so that the inclination of the grindstone 90 is inclined. Adjusted. The ground gear 32 is positioned and stopped at a predetermined position around the rotation axis, and the grindstone 90 is also positioned and stopped at a fixed position around the rotation axis. The respective constant phase positions of the grindstone 90 and the gear to be ground 32 are positioned at the grinding start position and when grinding is started, the grinding teeth 92 and the teeth 34 mesh with each other, and the grinding teeth 92 are ground to the teeth 34. It is a position where can be applied. From this state, the grindstone headstock 44 is moved in the front-rear direction by the grindstone headstock back-and-forth movement device 48 and in the left-right direction by the grindstone headstock left-right movement device 52, and the work piece headstock 12 is processed. The grindstone 90 and the gear to be ground 32 are moved to a predetermined grinding start position by being moved in the vertical direction by the workpiece head stock moving device 16. Thereafter, grinding is started while the grindstone spindle 86 and the workpiece spindle 26 are rotated synchronously. The work spindle 26 is rotated by one tooth while the grindstone 90 is rotated once (one tooth if the grindstone 90 is a single-tooth grindstone, and two teeth if the grindstone 90 is two-grind grindstone) and up and down. Feeded in the direction. Thus, the teeth 34 are ground by the grinding teeth 92 by the generating grinding motion given by the synchronous rotation of the workpiece spindle 26 and the grindstone spindle 86 and the feed given by the relative movement in the vertical direction. As shown in FIG. 4, the workpiece spindle rotating device 38 and the grindstone spindle rotating device 94 are synchronously controlled by the first synchronization control device 170, and the workpiece spindle 26 and the grindstone spindle 86 are synchronously rotated. The workpiece spindle moving device 16 is controlled by the feed control device 172, and the workpiece spindle 26 is moved in the vertical direction. The first synchronous control device 170 includes a portion for controlling the workpiece spindle rotating device 38 and the grindstone spindle rotating device 94 of the control device 150, and a generating grinding motion is imparted together with the workpiece spindle rotating device 38 and the grindstone spindle rotating device 94. A device 174 is configured. Further, the feed control device 172 includes a part for controlling the workpiece spindle moving device 16 of the control device 150, and constitutes a grinding control device 176 together with the workpiece spindle moving device 16 and the generating grinding motion applying device 174. ing. In the present embodiment, the workpiece head stock moving device 16 which is a part of the relative moving device functions as a relative positioning device for aligning the positions of the gear to be ground 32 and the grindstone 90 and also as a feeding device during grinding. To do.

  When it is necessary to perform dressing on the grindstone 90, the grindstone headstock 44 is moved in the front-rear direction and the left-right direction by the grindstone headstock front-back direction moving device 48 and the grindstone headstock left-right direction moving device 52, and the dresser base 110 is moved in the vertical direction by the workpiece head stock moving device 16, and the grindstone 90 and the dresser 112 are positioned at the dressing start position. At that time, if necessary, the dresser 112 is adjusted in the posture around the vertical axis, and the inclination angle of the dressing surface 140 with respect to the grinding teeth 92 is adjusted. This adjustment is performed by the operator. The screw 128 is loosened and the dresser base support member 130 is rotated around the support shaft 126 to adjust the posture around the axis parallel to the vertical direction of the dresser base 110. After the adjustment, the bolt 128 is tightened to tighten the dresser. The base support member 130 is fixed to the attachment portion 122. Since the dresser base 110 is provided on the front side of the grindstone main spindle 44 and is attached to the workpiece main spindle 12 positioned at the front part of the cylindrical gear grinding machine, the dresser base 110 and the operator positioned on the front side are arranged. The operator can easily adjust the posture of the dresser base 110 by opening the door of the cover that covers the cylindrical gear grinding machine. Further, the dresser base 110 is attached to the left side of the work spindle stock 12 when the main grinding machine is viewed from the front side, and is attached to the same side as the side from which the grindstone spindle 86 is projected. The grindstone 90 is close in the left-right direction, and positioning and dressing thereof are easily performed.

  After positioning the grindstone 90 and the dresser 112 to the dressing start position, the dresser 112 and the grindstone 90 are rotated, and the grindstone spindle stock 44 is moved in the left-right direction in synchronization with the rotation of the grindstone 90 by the grindstone spindle stock horizontal movement device 52. As shown in FIG. 2 by a two-dot chain line, the dressing surface 140 of the dresser 112 dresses the tooth surface of the grinding tooth 92 of the grindstone 90. Each of the two dressers 112 simultaneously dresses two different tooth surfaces, which are different parts of the grinding tooth 92 and are separated in a direction parallel to the rotational axis of the grindstone 90. The tooth surfaces on both sides of the grinding tooth 92 are simultaneously dressed. At this time, as shown in FIG. 5, the grindstone spindle rotating device 94 and the left-right moving table driving device 76 are synchronously controlled by the second synchronization control device 180, and the feed is synchronized with the rotation. The second synchronization control device 180 includes a portion for controlling the grindstone spindle rotating device 94 and the left / right moving table driving device 76 of the control device 150, and the dressing motion applying device together with the grindstone spindle rotating device 94 and the left / right moving table driving device 76. 182. In this grinding machine, the grindstone headstock lateral movement device 52, which is a part of the relative movement device, functions as a relative positioning device that aligns the positions of the grindstone 90 and the dresser 112, and also as a feeding device during dressing. .

  In addition, the cylindrical gear grinding machine is viewed from the front side, the X-axis direction is the left-right direction, the Y-axis direction is the up-down direction, the Z-axis direction is the front-rear direction, and the grindstone spindle is forward from the rear side. The grindstone may be held at the front end protruding toward the side, and the dresser base may be attached to the front end of the work spindle. Even in this case, the distance between the operator on the front side and the dresser base is short, and the operator can easily and quickly perform operations such as maintenance and setup change.

It is a perspective view which shows roughly the cylindrical gear grinding machine which is the Example of this invention. It is a top view which shows the dresser base of the said cylindrical gear grinding machine. It is a block diagram which shows the control apparatus which controls the said cylindrical gear grinding machine. It is a block diagram functionally explaining the generating grinding performed in the said cylindrical gear grinding machine. It is a block diagram functionally explaining dressing performed in the cylindrical gear grinding machine.

Explanation of symbols

  12: Workpiece headstock 16: Workpiece headstock moving device 26: Workpiece main shaft 32: Grinding gear 38: Workpiece main shaft rotating device 44: Whetstone headstock 46: Whetstone headstock moving device 48: Whetstone Spindle head longitudinal movement device 50: Grinding wheel spindle turning device 52: Grinding wheel spindle horizontal movement device 86: Grinding wheel spindle 90: Grinding wheel 94: Grinding wheel spindle rotating device 110: Dresser stand 112: Dresser 114: Dresser shaft 120: Posture adjustment Device 142: Dresser shaft rotation device 150: Control device

Claims (4)

A workpiece spindle stock that holds a workpiece spindle that holds a grinding gear rotatably about a rotation axis; and
A grindstone spindle head that holds a grindstone spindle that is generally cylindrical and that holds a grindstone having helical grinding teeth on its outer peripheral surface, and is rotatable around a rotation axis.
A relative movement device that relatively moves the workpiece headstock and the grindstone headstock to perform relative positioning of the grinding wheel and the gear to be ground;
A workpiece spindle rotating device for rotationally driving the workpiece spindle, a grinding wheel spindle rotating device for rotationally driving the grinding wheel spindle, and a synchronous control device for synchronously controlling both the rotating devices, the grinding wheel and the gear to be ground A creation grinding motion imparting device for imparting a creation grinding motion to
A dresser base that holds a dresser shaft that holds the dresser so as to be rotatable about a rotation axis;
A dresser shaft rotating device that rotationally drives the dresser shaft, and the dresser base is fixed to the work spindle, and relative positioning of the dresser and the grindstone is performed by the relative movement device and a dressing motion is applied. A cylindrical gear grinding machine characterized in that The relative movement device comprises:
A grindstone spindle stock moving device for turning the grindstone spindle stock around a turning axis perpendicular to the rotation axis of the grindstone spindle and moving in the X-axis direction and the Z-axis direction perpendicular to the turning axis.
2. A workpiece spindle stock moving device for moving the workpiece spindle stock in a Y axis direction perpendicular to the X axis direction and the Z axis direction and parallel to the workpiece spindle. The cylindrical gear grinding machine described in 1.   When the cylindrical gear grinder is viewed from the front side, the X-axis direction is the front-rear direction, the Y-axis direction is the up-down direction, the Z-axis direction is the left-right direction, and the grindstone spindle is from one of right and left to the other The grindstone is held at the tip portion projecting toward the workpiece, the workpiece spindle is provided on the front side of the grindstone spindle, and the dresser platform is the other of the right and left of the workpiece spindle The cylindrical gear grinding machine according to claim 2, wherein the cylindrical gear grinding machine is attached to the side.   The cylindrical gear according to claim 3, wherein the dresser base is attached to the work spindle stock through a posture adjusting device that adjusts a posture around a rotation axis parallel to the Y-axis direction. Grinder.

Images