JP2006341366A - Internal shaving attachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal shaving attachment, preventing shavings generated in the process of shaving from remaining on an internal tooth of the internal gear, facilitating replacement of a work, and improving the mesh (phase adjustment) working accuracy of a shaving cutter and an internal gear in replacement. <P>SOLUTION: A workpiece chuck 2 and a shaving cutter 3 are supported movably toward and away from each other in the vertical direction with the workpiece chuck 2 higher, and also supported to relatively move in the horizontal direction. The workpiece chuck 2 is constructed to hold the outer peripheral surface of the internal gear with the axis of rotation of the internal gear pointed to the vertical direction so that the shavings generated in machining using the shaving cutter 3 fall downward from the internal gear. The workpiece chuck further includes: a workpiece conveying part 41 (42) for carrying in the internal gear as a workpiece and carrying out the same, and the workpiece conveying part 41 (42) has a phase adjusting mechanism for adjusting the phase of the internal gear carried in a workpiece replacement position on the workpiece conveying part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an internal tooth shaving device.

A conventional internal tooth shaving device is configured to mesh a shaving cutter with an internal gear supported rotatably around a horizontal axis at a predetermined crossing angle, and rotate at least one of the shaving cutter and the work chuck while rotating the tooth surface of the internal gear. Is generally finished (see, for example, Patent Document 1).
JP 2003-117729 A

  However, the above-described conventional internal tooth shaving device has a problem in that shavings generated during shaving remain on the internal teeth of the internal gear, which adversely affects machining accuracy. In addition, it is difficult to replace the internal gear, which is a workpiece, and it is difficult to mesh (phase alignment) between the shaving cutter and the internal gear at the time of replacement.

  Then, an object of this invention is to provide the internal tooth shaving apparatus which can wipe out the said conventional problem.

  In order to achieve the above object, an internal tooth shaving device according to the present invention meshes a shaving cutter and an internal gear held by a work chuck with an intersecting angle, and rotationally drives at least one of the shaving cutter and the work chuck. An internal gear shaving device for finishing a tooth surface of the internal gear while the workpiece chuck and the shaving cutter are supported so as to be able to approach and separate in the vertical direction with the workpiece chuck as an upper side, and in the horizontal direction. The workpiece chuck is supported so that a shaving generated during machining by a shaving cutter can fall downward from the internal gear with the axis of rotation of the internal gear directed vertically. The work chuck and the shaving cassette are configured to grip an outer peripheral surface of the gear. A workpiece transfer unit that carries the internal gear into a workpiece exchange position located between the workpiece and the workpiece exchange position, and the workpiece conveyance unit is carried into the workpiece exchange position. A phase adjusting mechanism for adjusting the phase of the internal gear on the workpiece conveying portion; the phase adjusting mechanism meshes with an inner diameter guide portion for guiding an inner periphery of the internal gear; and an inner gear guided by the inner diameter guide portion. A phase determining pinion that fits, a moving mechanism that moves the phase determining pinion between a retracted position separated from the internal gear and a meshing position that meshes with the internal gear, and the phase determining pinion that meshes with the internal gear are predetermined. And a rotation mechanism that rotates the phase to a different phase.

  The work transport unit has a first swing axis parallel to the rotation axis of the work chuck, and is spaced apart from the work exchange position located on the vertical movement path of the work chuck and from the work exchange position to the side. Preferably, the workpiece loading arm has a swinging workpiece loading arm between the workpiece loading position and the workpiece loading arm includes the phase adjusting mechanism.

  The moving mechanism includes a first linear actuator, and the rotating mechanism converts a linear reciprocating motion of the second linear actuator and a movable portion of the second linear actuator into a rotating motion of the rotating shaft of the phase determining pinion. It is preferable that the rotating mechanism is supported by the moving mechanism.

  The conversion mechanism is preferably a link mechanism that connects the cylinder rod and a rotation shaft of a phasing pinion.

  It is preferable that the phase adjusting mechanism includes a sensor that detects that the phase determining pinion is in a meshing position with an internal gear.

  It is preferable that a cutter positioning mechanism for stopping the shaving cutter at a predetermined rotational angle position is further provided.

  The workpiece chuck is controlled to rotate by a pre-programmed rotation angle so as to mesh with a shaving cutter positioned by the cutter positioning mechanism after gripping a workpiece phased by the phase adjusting mechanism. It is preferable.

  According to the internal tooth shaving device according to the present invention, the shavings being processed fall downward from the tooth surface of the workpiece, do not remain on the tooth surface, and the phase-matched workpiece is transported by the workpiece transport section. Therefore, since the shaving cutter can be accurately meshed with the workpiece after the workpiece is exchanged, the machining accuracy can be improved.

  A preferred embodiment of an internal tooth shaving device according to the present invention will be described below with reference to FIGS. In addition, the same code | symbol was attached | subjected to the same component through the whole figure.

  As shown in FIGS. 1 to 3, the internal-tooth shaving device 1 is such that the work chuck 2 and the shaving cutter 3 are supported so as to be able to approach and separate in the vertical direction with the work chuck 2 on the upper side, and the horizontal movement is relatively performed. Supported as possible.

  In the illustrated example, the work chuck 2 can be driven to rotate about a vertical axis by a spindle motor 4, and is supported together with the spindle motor 4 so as to be movable in the vertical direction by a lifting actuator 5.

  Then, the shaving cutter 3 is supported so as to be swingable about the meshing center point as shown by an arrow R in FIG. 1 so as to mesh with the internal gear held by the work chuck 2 with an intersecting angle. And can be stopped at a predetermined swing angle. Further, the shaving cutter 3 can be moved horizontally in the horizontal direction (Y direction in FIG. 2) by the drive unit 30. In the illustrated example, the shaving cutter 3 rotates with an internal gear that is driven to rotate.

  The work chuck 2 employs a collet chuck that grips the outer peripheral surface of the internal gear with the rotation axis of the internal gear oriented in the vertical direction so that shavings generated during processing by the shaving cutter 3 can fall downward from the internal gear. be able to.

  FIG. 4 is a longitudinal sectional view showing details of the shaving cutter 3. FIG. 4 shows a swing shaft 31 for swinging the shaving cutter 3, a worm wheel 32 fixed to the rear end of the swing shaft 31, and a worm 33 that meshes with the worm wheel 32. A cutter positioning mechanism for stopping the shaving cutter 3 at a predetermined rotational angle position is provided. For example, as shown in FIG. 5, the cutter positioning mechanism includes a locking recess 3c formed in the spindle shaft 3s of the shaving cutter 3, and a phasing pin 3p that is detachably operated by the air cylinder 3d in the locking recess 3c. And can be provided. Further, a projection 3g is formed on the spindle shaft 3s, and this projection 3g is detected by the proximity sensor 3f.

  Further, FIG. 4 shows a clamp device 34 for fixing the shaving cutter 3 at a desired swing angle. The clamp device 34 includes a hydraulically driven piston 34 a, a piston rod 34 b fixed to the piston 34 a, and a clamper 34 c connected to the tip of the piston rod 34 c, and the clamper 34 c moves the peripheral flange portion 3 a of the shaving cutter 3. After pressing, the shaving cutter 3 can be set to a desired swing angle and then fixed.

  As shown in FIG. 6, the elevating actuator 5 is arranged so that the rotation axis is directed in the vertical direction, and is fixed to the structural frame F. A screw shaft 5b is connected to the rotary shaft 5a of the lifting / lowering actuator 5, and the screw shaft 5b extends in the vertical direction. A nut body 6 is screwed into the screw shaft 5b. The nut body 6 is connected to the support body 7. The support 7 is slidably mounted on a vertical rail 8 (see FIG. 1) provided on the structural frame F. In order to balance the left and right of the support 7, the left and right ends of the support 7 are connected to the piston rods of the balance cylinders F1 and F2 supported by the structural frame F as shown in FIG.

  A spindle motor 4 and a main shaft 9 are supported on the support 7. The spindle motor 4 and the main shaft 9 have their respective axes oriented in the vertical direction, and are connected by driving with a gear 10. The main shaft 9 is supported by bearings 11, 12 and 13 (FIG. 7) in the support body 7 so as to be rotatable around the axis. As shown in FIG. 7, the work chuck 2 is supported on the main shaft 9. Further, a coolant scattering prevention cover 72 is supported on the support 7.

  When the lifting / lowering actuator 5 is driven, the support body 7 is moved up and down along the screw shaft 5b, whereby the work chuck 2 is moved up and down together with the main shaft 9. When the spindle motor 4 is driven, the main shaft 9 rotates and the work chuck 2 is rotated.

  As shown in an enlarged cross-sectional view in FIG. 7, the work chuck 2 has a collet 2 f that grips the outer peripheral surface of the internal gear with the rotation axis of the internal gear that is the work W directed in the vertical direction, and the rotation axis of the work W. And a work stopper 2s having a seat surface that receives the upper end surface in the axial direction of the work W in the vertical direction.

A seat plate block 2j is fixed to the lower end of the main shaft 9 by a bolt B1. Seat plate block 2j has a cylindrical portion 2j ₁ which is fitted to the lower end recess 9a of the main shaft 9.

  A drive shaft 2 a for driving the collet 2 f is disposed so as to penetrate the inside of the main shaft 9 in the axial direction of the main shaft 9. A pull stud 2p is detachably attached to the lower end of the drive shaft 2a.

Pull stud 2p is inserted into the cylindrical portion 2j ₁ of the seat plate block 2j. A radially extending arm 2b is screwed to the pull stud 2p, and the arm 2b is accommodated in the open space 2js of the seat plate block 2j. In FIG. 7, only an arm extending in one direction is shown for convenience of illustration, but in the embodiment, it extends in three directions at equal angular intervals.

  A guide member 2i having a tapered inner peripheral surface is fixed to the seat plate block 2j by a bolt B2. The work stopper 2s is sandwiched between the seat plate block 2j and the guide member 2i.

A connecting rod 2c is fixed to the arm 2b by a bolt B3. The connecting rod 2c penetrates the guide member 2i. In the guide member 2i, a collet holding ring 2d is connected by a bolt B4. A collet clamping ring 2e is fixed to the collet clamping ring 2d by a bolt B5. These clamping ring 2d, the flange portion 2f ₁ of the collet 2f during 2e is held.

  The collet 2f has a slit (not shown) and a tapered outer surface guided by the tapered inner peripheral surface of the guide member 2i. Therefore, when the drive shaft 2a is pulled upward in the drawing, the tapered outer peripheral surface of the collet 2f is guided by the tapered inner peripheral surface of the guide member 2i, and the collet 2f is radially reduced in diameter by elastic deformation. The outer peripheral surface of the internal gear is tightened and clamped.

  A rotary joint 77 is attached to the upper end of the drive shaft 2a. The rotary joint 77 includes hydraulic oil ports 22 and 23 (FIG. 8). A piston 24 is fixed to the drive shaft 2a. The piston 24 is accommodated in a piston chamber 25, and the piston chamber 25 is screwed to a gear holder 26 fixed to the main shaft 9 via a gear 10, as shown in FIG. Therefore, the piston chamber 25 does not move up and down with respect to the support 7 and rotates together with the main shaft 9.

As shown in FIG. 7, hydraulic oil chambers 25 a and 25 b that are vertically partitioned by the piston 24 are formed inside the piston chamber 25. The hydraulic oil ports 22 and 23 communicate with the hydraulic oil chambers 25a and 25b, respectively. In the illustrated example, the drive shaft 2a, the upper shaft portion 2a ₁ of the piston 24 is formed, it is screwed to the lower shaft portion 2a _2.

  When the hydraulic oil is supplied to the lower hydraulic oil chamber 25b in FIG. 7 and discharged from the upper hydraulic oil chamber 25a, the piston 24 is pushed upward in FIG. 6, thereby pulling up the drive shaft 2a. The collet 2f tightens the workpiece W. In the opposite case, the collet 2f is expanded, and the workpiece W held can be removed.

The position of the vertical movement of the drive shaft 2 a is detected by the sensors 27 and 28. The sensors 27 and 28 can employ proximity switches. The sensors 27 and 28 are fixed to a cap body 78 attached to the upper part of the rotary joint 77. The upper end portion 2a ₁ of the drive shaft 2a, a pair of upper and lower annular protrusions 20a, 20b are formed. When the work chuck 2 is at the chuck position, the sensor 27 detects the convex portion 20a, and when the work chuck 2 is at the non-chuck position, the sensor 28 detects the convex portion 20b.

  A protrusion 25p is formed on the side of the casing forming the piston chamber 25. The sensor 50 detects this protrusion 25p. The sensor 50 is fixed to a plate 29 erected on the cover casing 7 a of the support 7. The plate 29 includes a projecting piece 29a slidably engaged with a longitudinal groove 77a (see FIG. 8) formed in the rotary joint 77. Therefore, the rotary joint 77 is restricted from rotating around the vertical axis by the protrusion 29a, but is allowed to move in the vertical direction. The sensor 50 detects the original position (reference rotation angle position) regarding the rotation angle of the main shaft 9 by the protrusion 25p. As will be described later, it is necessary to detect the original position of the main shaft 9 in order to align the phase of the internal gear that is the workpiece W and the teeth of the shaving cutter 3.

  The coolant pipe P1 passes through the drive shaft 2a and the pull stud 2p in the axial direction. The discharge port of the coolant pipe P <b> 1 is directed to a meshing point between the internal gear W gripped by the work chuck 2 and the shaving cutter 3. While the main shaft 9 is rotating and shaving, the coolant pipe P1 does not rotate, and the coolant is always supplied from above the internal gear W to the meshing point between the internal gear W and the shaving cutter 3. ing.

  The internal tooth shaving device 1 includes a work transfer unit for transferring an internal gear, which is a work, to the work chuck 2. As shown in FIGS. 3 and 8, the work transfer unit includes a work carry-in arm 41 and a work carry-out arm 42.

  The workpiece loading arm 41 is supported so as to be swingable around a first swing axis 41 a parallel to the rotation axis of the work chuck 2, and a workpiece replacement position Yc positioned on the vertical movement path of the work chuck 2. It swings between a workpiece insertion position Yin separated from the workpiece replacement position to the front right side.

  The workpiece carry-out arm 42 is supported so as to be swingable around a second swing axis 42a parallel to the rotation axis of the work chuck 2, and is separated from the workpiece replacement position Yc and the workpiece replacement position Yc to the left on the near side. Swings between the workpiece take-out position Yout.

  The workpiece carry-in arm 41 and the workpiece carry-out arm 42 are respectively constituted by hydraulic cylinders 41m and 42m (see FIG. 1) and a pinion rack (not shown) that converts the linear motion of these hydraulic cylinders 41m and 42m into a rotational motion. Swing.

  The workpiece carry-in arm 41 supports the internal gear with its axis of rotation directed in the vertical direction so that the work chuck 2 can grip the internal gear on the workpiece carry-in arm 41 from above.

  The workpiece carry-in arm 41 has a phase matching mechanism for phase-phasing the internal gear carried into the workpiece exchange position Yc on the workpiece carry-in arm 41.

  As shown in FIGS. 9 to 12, the phase alignment mechanism includes an inner diameter guide portion 80 that guides the inner periphery of the internal gear, a phase determination pinion 81 that meshes with the internal gear guided by the inner diameter guide portion 80, and a phase determination A moving mechanism for moving the pinion 81 between a retracted position separated from the internal gear and a meshing position for meshing with the internal gear; and a rotating mechanism for rotating the phase determining pinion 81 meshed with the internal gear to a predetermined phase. ,have.

  The inner diameter guide portion 80 has a cap shape for positioning the internal gear in the radial direction, and has an annular peripheral wall 80a shaped along the inner periphery of the internal gear. A gap through which the phase determining pinion 81 enters and exits is formed in the peripheral wall 80a.

  The moving mechanism includes a first linear actuator that is driven by an air cylinder 82. A bearing 84 that rotatably supports the rotation shaft 81a of the phase determining pinion 81 is mounted on a slider plate 83 connected to the rod 82a of the air cylinder 82. The slider plate 83 is suspended from the rail 85 so as to be slidable. When the rod 82 a of the air cylinder 82 reciprocates, the phase determining pinion 81 enters and exits from the clearance of the peripheral wall 80 a of the inner diameter guide portion 80.

  The rotation shaft 81 a of the phase determining pinion 81 is connected to an air cylinder 87 constituting a second linear actuator via a link mechanism 86. The link mechanism 86 constitutes a conversion mechanism that converts the linear reciprocating motion of the cylinder rod 87 a of the air cylinder 87 into the rotational motion of the phase determining pinion 81.

  By controlling the stroke length of the air cylinder 82 to be constant, the phase determination pinion 81 is rotated to a predetermined phase through the conversion mechanism, and thus the rotation mechanism is configured.

  In order to control the stroke length of the air cylinder 82 to be constant, a sensor 88 that detects that the slider plate 83 is in a predetermined position can be provided. In this embodiment, the touch sensor 88 fixed to the cover casing 90 detects the bolt 89 fixed to the front end of the slider plate 83, and at this time, the phase determining pinion 81 is in the meshing position with the internal gear. Can be detected. When the tip of the bolt 89 comes into contact with the touch sensor 88, the air cylinder 82 is stopped by an air pressure control circuit (not shown).

  In this embodiment, the air cylinder 87 is fixed to the cover casing 90. When the air cylinder 82 constituting the moving mechanism is actuated to push out the phase determining pinion 81, the air cylinder 87 constituting the rotating mechanism is not yet actuated. Therefore, when the air cylinder 82 is operated, the phase determining pinion 81 is pushed out by the link mechanism 86 while rotating. By such an operation, the phase determining pinion 81 is easily meshed with the internal gear. At the same time or after the phase determining pinion 81 meshes with the internal gear, the air cylinder 87 constituting the rotating mechanism is operated to rotate the internal gear to a predetermined phase. The air cylinder 87 can also be supported by the slider plate 83.

  An assembly 93 including an inner diameter guide portion 80, a rail 85, a slider plate 83, an air cylinder 82, a cover casing 90, and the like is elastically supported by a coil spring 94. Thereby, it is possible to buffer the impact when receiving the internal gear.

  In the internal tooth shaving device 1 having the above-described configuration, the initial setting of the control program is made according to the following procedure before the shaving process, whereby the shaving cutter is phase-matched on the workpiece conveying unit by the phase-adjusting mechanism. Automatically meshes with the internal gear. A control program initial setting method will be described with reference to the flowcharts of FIGS.

  First, a workpiece loading operation is performed (steps S1 to S8). In step S1, the reference rotation angle position (original position) of the work chuck 2 is determined. The reference rotation angle position of the work chuck 2 is a position where the sensor 50 detects the protrusion 25p. Next, the workpiece loading arm 41 having the phased internal gear mounted thereon is advanced from the workpiece loading position Yin to the workpiece replacement position Yc (step S2), the lift actuator 5 is driven, and the workpiece chuck 2 and the workpiece loading arm 41 are moved over. The internal gear is moved closer (step S3), and the internal gear is gripped by the work chuck 2 (step S4). Then, the lift actuator 5 is driven again to raise the work chuck 2 to a height that does not interfere with the work carry-in arm 41 (step S5), and then the work carry-in arm 41 is moved backward (step S6). The lift actuator 5 is again driven to lower the work chuck 2 to a height position where it can mesh with the shaving cutter 3 (step S7). The phase determining pin 3p (FIG. 5) of the shaving cutter 3 is released so that the shaving cutter 3 can be freely rotated (step S8).

  Next, the operation of engaging the workpiece is performed (S9, or S10 to S15). As for the meshing operation of the workpiece, manual operation (step S9) or automatic operation (steps S10 to S15) can be selected.

  In the case of manual operation (step S9), the handle (not shown) is operated to manually move the shaving cutter 3 horizontally and engage the shaving cutter 3 with the workpiece. At this time, since the phasing pin 3p is released and the shaving cutter 3 is free, it can be manually rotated so as to mesh with the workpiece.

  In the automatic case (steps S10 to S15), the drive unit 30 is driven to move the shaving cutter 3 horizontally in the horizontal direction (Y direction in FIG. 2) to a position just before meshing with the workpiece. The drive unit 30 is driven so that the shaving cutter 3 is further moved horizontally toward the meshing position, and the meshing check program is started (step S11). When it is detected that an abnormal current flows through the motor constituting the drive unit 30, it is determined that the meshing is poor, and when the abnormal current does not flow, it is determined that there is no meshing failure (step 12). The meshing failure may occur when the teeth of the shaving cutter 3 and the teeth of the internal gear, which is a workpiece, hit each other. If it is determined that the meshing is poor, the shaving cutter 3 is slightly retracted (step S13), the work is rotated by a quarter pitch of the tooth width (interval between tooth crests) (step S14), and again. Engagement determination is performed (step S12). If it is determined that there is no meshing failure, the shaving cutter 3 is moved horizontally to the fully meshing position (step 15), and the meshing check program is turned off (step S16).

  Next, the spindle motor 4 that rotates the work chuck 2 is rotated by a predetermined rotation angle, and the predetermined rotation angle position of the shaving cutter 3 phased by the phase determination pin of the shaving cutter 3 and the reference rotation angle of the work chuck The phase difference from the position is determined (steps S17 to S30).

  As shown in FIG. 5, when the spindle shaft 3s is phased by the phasing pin 3p, the shaving cutter 3 is formed on the side opposite to the locking recess 3c where the phasing pin 3p is locked. The proximity sensor 3f detects the protrusion 3g. The proximity sensor 3f has a sensitive width H sensitive to the protrusion 3g as shown in FIG. 5, and this width H will be referred to as “cutter ON width” hereinafter. The phase of the workpiece is equal to the phase of the workpiece chuck 2 and therefore equal to the phase of the spindle motor 4. The phase of the workpiece is hereinafter referred to as “work orientation data” and is represented by the symbol a. Information regarding the phase of the shaving cutter when it is at the cutter ON width is hereinafter referred to as “cutter ON width orientation data” and is represented by the symbol c.

  First, at the stage where the meshing check is OFF (step 16), the work orientation data and the cutter ON width are set to "0" (step 17). At the stage of meshing check OFF (step S16), the phase of the shaving cutter 3 is unknown.

  The workpiece is positioned at the workpiece orientation data a = 0 (step S18), and at this stage, it is determined whether or not the shaving cutter 3 is within the cutter ON width (step 19). When it is determined that the shaving cutter 3 is within the cutter ON width, that is, when the proximity sensor is turned on, the shaving cutter 3 is rotated by a certain rotation angle (b) until the proximity sensor is turned off (step S20). This constant rotation angle corresponds to, for example, one pulse of a pulse motor that is the spindle motor 4. When this rotation operation is repeated and the proximity sensor 3f is determined to be OFF (step 19), the shaving cutter 3 is indexed (step 21).

  In this case, as in step 20, the shaving cutter 3 is rotated by a predetermined rotation angle b (step S22, step 23). When this rotation operation is continued and the proximity sensor 3f is turned on next, that is, when it is determined that the cutter axis index is “YES” (step 21), the process proceeds to the next step. At this time, one end of the sensitive width H of the proximity sensor 3f is detected.

  Further, the same rotation operation is repeated (steps S24 to S26), and when the proximity sensor 3f is turned off, that is, when the cutter shaft index is determined to be “NO”, the other end of the sensitive width H of the proximity sensor 3f is determined at this position. Detected.

  When data regarding the rotational angle position of the spindle shaft corresponding to the sensitive width H of the proximity sensor 3f is obtained in this way, the intermediate angular position of the sensitive width H is calculated (step S27). If the information about the intermediate angle position is obtained, the internal gear held by the work chuck 2 is phased by the phase determination pin 3p if the spindle motor 4 is rotated from the reference rotation angle position to the intermediate angle position. Can automatically mesh with the shaving cutter 3.

  Since the rotation angle of the spindle motor 4 from the reference rotation angle position to the intermediate angle position is normally considered to be larger than one pitch of the internal gear, in order to minimize the phase alignment of the spindle motor 4, Calculations are made so as to be smaller than the rotation angle corresponding to one pitch (steps 28 and 29). For example, when the angle difference between the reference rotational angle position and the intermediate angle position of the spindle motor 4 is 21 ° and one pitch of the teeth is 5 °, the minimum angle is 21 ° −5 ° × 4 = 1 °. It becomes. The minimum angle thus obtained is stored in the storage device in the control device (step 30).

  Workpiece replacement and machining are performed as follows. First, when a workpiece is placed at the workpiece loading position Yin, the workpiece loading arm 41 swings and loads the workpiece into the workpiece replacement position. Next, the work chuck 2 descends and grips the work on the work carry-in arm 41. Thereafter, the work chuck 2 moves up to a position where it does not interfere with the work carry-in arm 41, and the work carry-in arm 41 swings back to the work loading position.

  Next, the spindle motor 4 rotates the work chuck 2 by the minimum angle under the control of a control device (not shown) so that the meshing phases of the work and the shaving cutter 3 coincide. Then, the work chuck 2 is lowered, and the shaving cutter 3 is lowered to a height position where it enters the internal gear W. The shaving cutter 3 swings around the horizontal axis so as to make a desired crossing angle with the workpiece. The shaving cutter 3 is fixed at a desired swing angle, then moves in the horizontal direction, approaches the internal gear W, and meshes with the internal gear W.

  When the workpiece chuck 2 forcibly rotates the workpiece, the shaving cutter 3 rotates with the workpiece, and finishing processing is performed by combining the vertical movement of the workpiece chuck 2 and the horizontal movement of the shaving cutter 3. After finishing, the work chuck 2 rotates the shaving cutter 3 through the work to a predetermined phase, that is, a position where the phasing pin 3p is engaged with the engaging recess 3c and stops. If the work chuck 2 is raised and the coolant splash prevention cover 72 is also raised after the work chuck 2 is stopped, the work carry-out arm 42 is moved to the work exchange position Yc located between the work chuck 2 and the shaving cutter 3. Swing and prepare to receive processed workpiece. When the workpiece chuck 2 is lowered and the workpiece unloading arm 42 receives a processed workpiece from the workpiece chuck 2, the workpiece unloading arm 42 swings and moves after the workpiece chuck 2 is raised to a position where it does not interfere with the workpiece unloading arm 42. The processed workpiece is carried out from the exchange position Yc to the workpiece removal position Yout.

  As described above, since the workpiece on the workpiece loading arm 41 is phased by the phase matching mechanism, the workpiece can be automatically meshed with the shaving cutter by the control device.

  The internal-tooth shaving device 1 having the above-described configuration causes the shaving cutter 3 to oscillate to have a predetermined crossing angle with the internal gear as the work W gripped by the work chuck 2, and to move the work chuck 2 in the vertical direction and to perform shaving. Shaving such as conventional processing is performed by moving the cutter 3 in the horizontal direction.

  During machining, the internal gear that is a workpiece has an opening formed by the tooth surface facing downward, and the shavings being machined fall downward, so that no shavings remain on the internal teeth. Accordingly, the processing accuracy is improved. The shavings are collected in the dust box 91 through the shooter.

  In the above embodiment, a configuration in which the work chuck moves up and down for exchanging the workpiece is adopted, but a configuration in which the workpiece carry-in arm and the workpiece carry-out arm are moved up and down may be adopted. In the above embodiment, the shaving cutter is swingable. However, the work chuck can be swingably configured. Furthermore, instead of forcibly driving the workpiece, the shaving cutter may be forcibly driven, or both the shaving cutter and the workpiece can be forcibly driven in synchronization. Furthermore, although the collet chuck is shown as the work chuck in the above embodiment, a drill chuck or other gripping means can be employed.

  Moreover, in the said embodiment, although the rocking | fluctuating arm was illustrated as a workpiece conveyance part, the workpiece conveyance part driven linearly is also employable.

1 shows an embodiment of an internal tooth shaving device according to the present invention, and is a front view corresponding to II view of FIG. 3. It is a side view of the internal-tooth shaving apparatus shown in FIG. FIG. 3 is a plan view corresponding to the III-III view of FIG. 2. It is a longitudinal cross-sectional view which shows the internal structure of the shaving cutter which is a component of the internal-tooth shaving apparatus shown in FIG. It is a fragmentary sectional view which follows the VV line of FIG. FIG. 4 is an enlarged longitudinal sectional view taken along line VI-VI in FIG. 1. It is the longitudinal cross-sectional view which abbreviate | omitted a part of FIG. 6 and expanded. It is a top view which expands and shows a part of internal tooth shaving apparatus of FIG. It is a horizontal sectional view which expands and shows the work loading arm shown in Drawing 1, and is a sectional view which meets the IX-IX line of Drawing 10. It is a longitudinal cross-sectional view which follows the XX line of FIG. It is a longitudinal cross-sectional view which follows the XI-XI line of FIG. It is a longitudinal cross-sectional view which follows the XII-XII line | wire of FIG. It is a part of flowchart which shows the initial setting procedure of the internal-tooth shaving apparatus shown by FIG. It is a flowchart following the flowchart of FIG. It is a flowchart following the flowchart of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal-tooth shaving apparatus 2 Work chuck 2a Drive shaft 3 Shaving cutter 9 Main shaft 70 Main body cover 72 Coolant scattering prevention cover 80 Inner diameter guide part 81 Phase determination pinion 82 Air cylinder 83 Slider plate 86 Link mechanism 87 Air cylinder 88 Sensor P1 Coolant pipe

Claims (7)

An internal tooth shaving device that meshes a shaving cutter and an internal gear held by a work chuck with an intersecting angle, and finishes the tooth surface of the internal gear while rotating at least one of the shaving cutter and the work chuck. There,
The work chuck and the shaving cutter are supported so as to be able to approach and separate in the vertical direction with the work chuck as an upper side, and supported so as to be relatively movable in the horizontal direction.
The work chuck is configured to grip the outer peripheral surface of the internal gear with the axis of rotation of the internal gear facing up and down so that shavings generated during processing by the shaving cutter can fall downward from the internal gear. And
A work transfer unit for carrying the internal gear into a work exchange position located between the work chuck and the shaving cutter, and carrying out the internal gear from the work exchange position;
The work transport unit has a phase alignment mechanism that performs phase alignment on the work transport unit for an internal gear carried into the work replacement position.
The phase adjusting mechanism includes an inner diameter guide portion that guides the inner periphery of the internal gear, a phase determination pinion that meshes with the internal gear guided by the inner diameter guide portion, and a retracted position that separates the phase determination pinion from the internal gear. An internal tooth comprising: a moving mechanism that moves between a meshing position that meshes with an internal gear; and a rotation mechanism that rotates the phase determination pinion meshed with the internal gear to a predetermined phase. Shaving device. The work transport unit has a first swing axis parallel to the rotation axis of the work chuck, and is spaced apart from the work exchange position located on the vertical movement path of the work chuck and from the work exchange position to the side. The internal gear shaving apparatus according to claim 1, further comprising a workpiece loading arm that swings between the workpiece loading position and the workpiece loading arm including the phase adjusting mechanism. The moving mechanism includes a first linear actuator;
The rotation mechanism includes a second linear actuator, and a conversion mechanism that converts a linear reciprocating motion of a movable portion of the second linear actuator into a rotational motion of a rotating shaft of the phasing pinion. The internal tooth shaving device according to claim 1. The internal gear shaving device according to claim 3, wherein the conversion mechanism is a link mechanism that connects the movable portion of the second linear actuator and the rotation shaft of the phase determining pinion. The internal gear shaving device according to claim 1, wherein the phase matching mechanism includes a sensor that detects that the phase determination pinion is in a meshing position with an internal gear. The internal tooth shaving device according to any one of claims 1 to 5, further comprising a cutter positioning mechanism for stopping the shaving cutter at a predetermined rotational angle position. The workpiece chuck is controlled to rotate by a pre-programmed rotation angle so as to mesh with the shaving cutter positioned by the cutter positioning mechanism after gripping the workpiece phased by the phase alignment mechanism. The internal tooth shaving device according to claim 6.

Images