JP2006272500A - Gear finishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear finishing device capable of reducing the loss of time due to an operation and release of a tailstock, and shortening non-machining time. <P>SOLUTION: In the gear finishing device, a gear to be machined rotatably supported on the tailstock which is relatively movably arranged opposite on the coaxial line is engaged with a cutter 2, and the cutter is driven to rotate and perform a finish cutting by corotating the gear. The gear finishing device is equipped with a turning table 3, and at least two tailstocks 4, 4 which are supported around the turning axis of the turning table 3, and can be independently driven respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gear finishing apparatus.

  Conventionally, as a gear finishing device of this type, when a pair of gear holders for clamping a workpiece gear with a clamp member are provided at both ends of the swivel body, and the one gear holder is in the machining position by rotating the swivel body The other gear holder can take the loading position, and the work gear in the machining position is received by the center pusher and is rotatably supported by the center pusher, while the work gear in the loading position is A gear finishing device is known in which a workpiece gear is phased by a rack and clamped by a clamp member in a gear holder (see, for example, Patent Document 1).

In such a conventional gear finishing device, after processing one gear to be processed, the center pusher is released and the swiveling body is swung to load an unprocessed workpiece into the processing position, and again, The structure is such that the work to be processed is rotatably supported by actuating the pusher and is processed by being engaged with the cutter.
JP 2000-117541 A

  However, the conventional gear finishing device has a time loss when the tail pusher clamps the workpiece and releases the clamp, which is a cause of lowering the production efficiency.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a gear finishing device that can reduce time loss due to operation / release of a tail pusher and reduce non-machining time.

  In order to achieve the above object, a gear finishing apparatus according to the present invention meshes with a cutter a gear to be machined that is rotatably supported by a center pusher that is disposed so as to be movable relative to each other on a coaxial line. A gear finishing device that rotates and drives the gears to perform finish cutting, and is supported by the swivel table and the swivel table around the swivel axis of the swivel table and can be driven independently. And at least two heart pushers.

  A rotation restraint mechanism for restraining the work gear to be non-rotatable and maintaining a phase determination state of the work gear when the work gear supported by the mandrel is in a non-engagement position with the cutter; Preferably it is.

  The gear finishing device further includes a gear conveying device that carries the processed gear from the processed gear stock portion into the core pusher and unloads the processed gear from the core pusher. A rack-equipped rail that receives a workpiece gear from a section and determines a phase; a first hand that carries the workpiece gear out of a predetermined position of the rail with the rack; and a gear that receives the workpiece gear from a first hand, A second hand for passing, a third hand for receiving the processed gear from the core pusher, and a fourth hand for receiving the processed gear from the third hand and carrying it out, and the first hand and the fourth hand are connected The second hand and the third hand are connected, the moving direction of the first hand and the fourth hand is orthogonal to the moving direction of the second hand and the third hand, and the fourth hand is the third hand. The second hand passes the processed gear to the tail pusher at the same time as the processed gear is received, and the fourth hand carries out the processed gear at the same time as the first hand transfers the processed gear to the second hand. It is preferable that

  According to the gear finishing device of the present invention, since at least two tail pushers are provided around the turning center of the swivel table, the gear to be processed supported by one tail pusher is engaged with the cutter and processed. While the other gear can be unloaded and the machined gear can be unloaded to load the workpiece gear so that it can clamp or release the gear. The waiting time can be eliminated, and the production efficiency can be improved.

  A preferred embodiment of a gear finishing device according to the present invention will be described below with reference to the drawings. Throughout the drawings, the same components may be denoted by the same reference numerals and description thereof may be omitted.

  FIG. 1 is a front view of the gear finishing device, and FIG. 2 is a side view thereof. 1 and 2 are simplified for the sake of simplicity. As shown in FIG. 1, the gear finishing device 1 includes a cutter 2, a swivel table 3, and a pair of tail pushers 4 and 4.

  The cutter 2 is supported so as to be movable in the vertical direction (Z direction in FIGS. 1 and 2) and is driven to rotate by a motor 5. The swivel table 3 is supported on the base 6 so as to be movable in the horizontal direction (Y direction in FIG. 1). The pair of tail pushers 4 and 4 are attached to the swivel table 3. The pair of tail pushers 4, 4 are arranged symmetrically about the turning axis of the turning table 3.

  The swivel table 3 is swiveled by the drive motor 7 via the indexing drive 8 and stopped at a predetermined angular position in the state shown in FIGS. The swivel table 3 includes an indexing table 9 connected to the indexing drive 8, a swivel shaft 10 having one end fixed to the indexing table 9, and a bearing portion 10a that rotatably supports the other end of the swivel shaft 10. Have.

  Referring to FIG. 3, each of the tail pushers 4, 4 is mounted on the indexing table 9 of the swivel table 3 so as to be rotatable and fixed on the swivel shaft 10. And a movable side center pushing portion 4b supported so as to be slidable in the axial direction (Y direction in FIG. 1).

  As shown in the sectional view of FIG. 3, the movable side center pushing portion 4b is driven by the actuator 11 fixed to the turning shaft 10 so as to move relative to or move away from the fixed side center pushing portion 4a. . FIG. 3 shows a cross section taken along line III-III in FIG. 5, and the upper tailstock does not appear in FIG.

  In the example shown in FIG. 3, the actuator 11 includes a rod 12 that is fixed in parallel to the pivot shaft 10, a piston 13 that is fixed to the rod 12, a cylinder 14 that is externally fitted to the rod 12, and a piston 13. It is constituted by an oil passage 15 that selectively sends hydraulic oil into the cylinder chamber 14a on one side or the cylinder chamber 14b on the other side, and a hydraulic circuit that includes a hydraulic pump (not shown) that sends hydraulic oil to the oil passage 15. Yes. In the illustrated example, one end of the rod 12 is supported by the oil passage block 16, and the other end is supported by an angle member 17 fixed to the indexing table 9 by pin coupling.

  And the movable side pushing part 4b is integrally connected with the cylinder 14, When hydraulic fluid is sent to the piston chamber 14a of one side, the hydraulic fluid of the piston chamber 14b of the other side will be discharged | emitted and with the cylinder 14 The movable side pusher 4b moves to the right side of the figure, and in the reverse case, it moves in the reverse direction. The movable side center pushing portions 4b and 4b of the pair of tail pushers 4 and 4 arranged symmetrically with respect to the pivot shaft 10 are configured in a hydraulic circuit so that they are independently driven.

  Whether the movable side center pushing part 4b is in a gear gripping position close to the fixed side center pushing part 4a, or whether the movable side center pushing part 4b is in a gear non-holding position separated from the fixed side center pushing part 4a. A movable side center pushing portion position detection mechanism 20 for detection is provided. The movable side center pushing portion position detection mechanism 20 detects a rod 23 having a recessed engaged portion 22 that can be engaged with an engaging claw 21 extending from the movable side center pushing portion 4b, and a rear end position of the rod 23. It consists of sensors 24 and 25. The rod 23 is supported so as to be slidable in the same direction as the movable side center pushing portion 4b. Then, as the movable side center pushing portion 4b moves with the engaged portion 22 engaged with the engaging claw 21, the rod 23 also slides, the gear gripping position is detected by the sensor 24, and the gear The sensor 25 detects the non-gripping position. The movable side center pusher 4b turns only when it is in the gear gripping position, and the engaging claw 21 is disengaged from the engaged portion 22 by turning the center pusher 4, but the engaged portion 22 maintains its position. Again, by the turning of the other one of the tail pushers 4, the locking claw 21 of the movable side pusher 4b is engaged with the engaged portion 22.

  As shown in FIGS. 3 and 4, brake pads 30, 30 that can restrain the rotation of the fixed side pushers 4 a, 4 a are incorporated in the pivot shaft 10. The brake pads 30, 30 are hydraulically driven, and are constantly applied to the fixed side pusher 4 by the urging spring 30 a to be braked. By sending pressure oil to the oil passage 31, the brake pads 30, 30 are It moves backward and leaves the heart pusher 4, and the brake is released.

  The brakes 30, 30 restrain the gear W to be non-rotatable by applying a brake to the tail pusher 4 when the work gear supported by the tail pushers 4, 4 is in a non-engagement position with the cutter 2. To maintain the phasing state. When the turning table 3 turns and the gear W to be processed comes to a position directly below the cutter, by releasing the brake, the restraint of the gear W to be processed is released, and the rotation by the cutting is made possible. In this way, a rotation restraint mechanism is constructed that restrains the gear to be non-rotatable and maintains the phase determination state of the gear to be processed when the gear to be processed supported by the tail pusher 4 is in a non-engagement position with the cutter 2. Yes.

  The swivel table 3 is arranged so that when one tail pusher 4 is in a machining position where it engages with the cutter 2, the other tail pusher 4 receives the workpiece gear and becomes a delivery position for delivering the processed gear. 1 is set. In the illustrated example, the upper tail pusher 4 is the processing position, and the lower tail pusher 4 is the delivery position. Delivery of the gear to the center pusher 4 at the delivery position is performed by a gear transport device described below.

  FIG. 7 is an overall perspective view showing a preferred embodiment of the gear transport device. In the figure, parts of the tail pushers 4 and 4 are indicated by imaginary lines.

  The gear finishing device 1 receives the workpiece gear W from the workpiece gear stock 40 and clamps the phase determining mechanism 70 including the rail 41 with the rack and the workpiece gear W at a predetermined position on the rail 41 with the rack. A first hand 42 to be carried out (see FIG. 1), a second hand 43 (see FIG. 2) that receives the gear W to be processed from the first hand 42 and passes it to the tail pusher 4 at the transfer position, and a processed gear From the third hand 44 (see FIG. 2) that receives from the tail pusher 4 at the delivery position, the fourth hand 45 (see FIG. 1) that receives the processed gear from the third hand 44 and carries it out, and from the fourth hand 45 A gear discharging unit 47 that receives the processed gear and sends it to the processed gear stock unit 46 (see FIG. 15).

  The first hand 42 and the fourth hand 45 are connected by a connecting plate 48. A pair of sliders 49 and 50 are attached to the connecting plate 48, and the sliders 49 and 50 are slidably mounted on a rail 52 fixed to the frame 51. The connecting plate 48 is connected to the piston rod 54 of the drive cylinder 53. Accordingly, as the piston rod 54 reciprocates, the first hand 42 and the fourth hand 45 connected to each other translate in the Y direction.

  As shown in FIG. 1, the first hand 42 and the fourth hand 45 include a pair of clamp fingers that extend downward so as to clamp both flat side surfaces of the gear. A cushion plate 42b formed of an elastic material or the like is attached to the clamp surface of one clamp finger 42a to the first hand 42, and the clamp surface of the other clamp finger 42c is movable within a predetermined range. A movable plate 42d to be supported is mounted. The movable plate 42d allows for errors such as misalignment. In FIG. 8, reference numeral 42e denotes an actuator.

  The second hand 43 and the third hand 44 are connected to a connecting plate 55 as shown in an enlarged view in FIG. A slider 56 is attached to the connecting plate 55, and is fixed to a frame 57, and the slider 56 is slidably mounted on a rail 58. The rail 58 extends in the X direction perpendicular to the Y direction in which the pivot shaft 10 extends and perpendicular to the vertical direction (Z direction) perpendicular to the pivot shaft 10.

  The connecting plate 55 is connected to the piston rod 60 of the drive cylinder 59, and the drive cylinder 59 is connected to the piston rod 62 of another drive cylinder 61 that is further arranged at the lower stage thereof. The drive cylinder 61 is fixed to the frame 63.

  The upper drive cylinder 59 is connected to each other between a position where the second hand 43 is in the delivery position of the tail pusher 4 and a position where the third hand 44 is in the delivery position of the tail pusher 4. The hand 43 and the third hand 44 are translated in the X direction. The lower drive cylinder 61 is connected to each other between the position where the second hand 43 receives the processed gear from the first hand 42 and the position where the third hand 44 passes the processed gear to the fourth hand 45. The second hand 43 and the third hand 44 are translated in the X direction.

  The frame 57 to which the rail 58 is fixed is connected to a piston rod 65 that moves up and down of a drive cylinder 64 fixed to the housing, and moves up and down the second hand 43 and the third hand 44 in the vertical direction (Z direction). So that it is supported. When the second hand 43 and the third hand 44 are in the delivery position of the tail pusher 4, the drive cylinder 64 moves the gear held by the second hand 43 or the third hand 44 to the height of the tail pusher 4. Raise it up.

  As shown in FIG. 2, the second hand 43 and the third hand 44 include a pair of clamp fingers extending upward so as to clamp the tooth surface of the gear. As shown in FIG. 10, the clamp fingers 43 a and 43 b of the second hand 43 are provided with claws 43 c and 43 c that fit into the tooth grooves of the gear W during clamping in order to maintain the phase of the gear W. In FIG. 10, reference numeral 43d indicates an actuator.

  The phase of the gear held by the second hand 43 is phased by the phase determining mechanism 70. The phase determining mechanism 70 will be described with reference to FIGS.

  The phase determining mechanism 70 includes a rail 41 with a rack that receives the workpiece gear W from the workpiece gear stock portion 40. In the gear stock portion 40 to be processed, the gears W to be processed are arranged in a line. A slit (not shown) extending in the longitudinal direction is formed in the workpiece gear stock portion 40, and a pusher 71 disposed at the rear of the gear train of the workpiece gear stock portion 40 passes through the slit to change the gear train. It can be pushed forward. The pusher 71 is driven by a drive cylinder 72.

  The gear to be machined at the head of the gear train pushed by the pusher 71 is received by the cradle 73. The cradle 73 has the same track as the rack-equipped rail 41, and a pusher 74 is further provided to push the processed gear W received by the cradle 73 to the rack-equipped rail 41. The pusher 74 is designed so that the workpiece gear W is pushed forward until the workpiece gear W comes into contact with the stopper portion 75 so that the workpiece gear W has a desired phase at the contact position.

  The rail 41 with a rack is provided with an engagement adjusting mechanism for normally engaging the rack and the gear to be processed. The meshing adjustment mechanism includes a gear height detection unit 81 that detects the height position of the workpiece gear W that rolls on the rack, and a tilt drive unit 82 that tilts the rack-equipped rail 41.

  That is, when the gear height detection unit 81 detects that the work gear W on the rack is higher than the normal mesh height (that is, not meshed), the tilt drive unit 82 is driven, and the rack-equipped rail 41 is moved. Tilt as shown in FIG. When the rack-equipped rail 41 tilts, the work gear W on the rack rolls along the slope and meshes with the teeth of the rack, and rolls while meshing and abuts on the cradle 73 and stops. Then, the tilt drive unit 82 releases the tilt and returns the rail 41 with the rack to the horizontal position shown in FIG. 12, and the pusher 74 is driven again. Such an operation is performed until the work gear W meshes with the rack of the rail 41 with the rack.

  When the mesh adjustment mechanism detects a normal mesh between the workpiece gear W and the rail 41 with the rack, the first hand 42 waiting at the position where the workpiece gear W abuts against the stopper 75 is moved to the workpiece gear W. Clamp W. After the first hand 42 clamps the workpiece gear W, the tilt drive unit 82 tilts and drives the rail 41 with the rack to separate the rail 41 with the rack from the gear W, as shown in FIG. In order to enable the first hand 42 to move in the Y direction, the gear height detection unit 81 is moved backward.

  The first hand 42 that has received the workpiece gear from the rack-equipped rail 41 moves in the X direction to the position where the workpiece gear W is delivered to the second hand 43, and stands by at that position. Therefore, when the second hand 43 moves upward in the Z direction by driving the drive cylinder 64 and the second hand 43 clamps the workpiece gear W clamped on the first hand 42, the first hand 42 releases the clamp. .

  Next, the second hand 43 is moved in the X direction to the position of the tail pusher 4 by driving the drive cylinder 59, and the center line of the gear W to be processed is positioned at the axial position of the lower tail pusher 4.

  Then, the movable side center pushing tool 4b approaches the workpiece gear by the operation of the actuator 11, and the workpiece gear W clamped on the second hand 43 by the fixed side center pushing tool 4a and the movable side center pushing tool 4b is moved. Hold friction. The gear W to be processed is held by the lower pusher 4, the clamp of the second hand 43 is released, and the second hand 43 is moved downward by driving the drive cylinder 64.

  In this state, the brake pad 30 constituting the rotation restraining mechanism abuts on the tail pusher 4 by the action of the biasing spring 30a, and the tail pusher 4 is braked. Is also constrained and the gear phase is maintained.

  When the tail pusher 4 receives the workpiece gear W from the second hand 43, the swivel table 3 turns 180 °, and the tail pusher 4 located below moves upward and is arranged immediately below the cutter 2. The At this position, the pressure oil in the oil passage 31 is sent, and the braking of the brake pad 30 is released. Then, the cutter 2 descends and meshes with the workpiece gear W held by the tail pusher 4. The cutter 2 stands by at a predetermined phase until it engages with the workpiece gear W by position control such as servo control, and the workpiece gear W is also held at the predetermined phase. Engagement with the gear W is performed smoothly.

  The cutter 2 is rotationally driven, and finishing of the workpiece gear W is performed by the accompanying rotation. During this processing, the lower tail pusher 4 receives the workpiece gear conveyed from the workpiece gear stock portion 40 from the second hand 43 and holds it in a predetermined phase by the operation procedure described above. is doing.

  When finishing of the gear to be processed is finished, the cutter 2 stops rotating and rises and leaves the processed gear W. Then, the swivel table 3 is rotated by 180 °, and the tail pusher 4 that has been waiting downward is disposed above and the finishing process is performed as described above, while the processed gear disposed below is To the third hand 44.

  Referring to FIGS. 7 and 9, when the third hand 44 is in a position directly below the lower fixed side pusher 4 b, the second hand 43 can receive the workpiece gear from the first hand 42. It is in.

  The second hand 43 and the third hand 44 are connected and ascend in a connected state. When the second hand 43 receives the gear to be processed from the first hand 42, the third hand 44 Is received from the heart pusher 4.

  The processed gear is received by the movable side center pusher 4b moving away from the fixed side center pusher 4a after the third hand 44 clamps the processed gear held by the tail pusher 4.

  Then, in a state where the third hand 44 clamps the processed gear and the second hand 43 clamps the gear to be processed, the position indicated by the solid line in FIG. 7, that is, the second hand 43 moves to the lower tail pusher 4. Move in the X direction to the position where the workpiece gear is delivered.

  After the second hand 43 delivers the workpiece gear to the tail pusher 4, the second hand 43 and the third hand 44 move downward, and further, the third hand 44 moves to the fourth hand 45 by moving in the X direction. Move until it is in the delivery position.

  By the time the third hand 44 moves to the delivery position to the fourth hand 45, the fourth hand 45 has moved to a position where the processed gear can be received from the third hand 44. When the third hand 44 moves up in the delivery position to the fourth hand 45, the fourth hand 45 clamps the processed gear clamped by the third hand 44, and the third hand 44 is released from the clamp. The third hand 44 is lowered.

  Thereafter, the third hand 44 moves again in the X direction to a position immediately below the lower fixed side pushing tool 4b, and waits until the processing of the gear supported by the upper pushing tool 4 is completed. When the processing of the gear supported by the upper tail pusher 4 is finished, as described above, the turning table 3 is rotated by 180 °, the second hand 43 and the third hand 44 are raised, and the second hand 43 is moved to the second hand 43. At the same time as receiving the gear to be processed from one hand 42, the third hand 44 receives the processed gear. These operations are repeated.

  The fourth hand 45 that has received the processed gear from the third hand 44 moves to the gear unloading portion 47 in the Y direction by driving the drive cylinder 53 with the processed gear clamped, and carries the processed gear out. . As shown in an enlarged view in FIG. 15, the gear carry-out portion 47 includes a cradle 91 that receives a processed gear from the fourth hand 45. When receiving the processed gear, the cradle 91 moves in the X direction by the linear actuator 92 until it is located on the same track of the processed gear stock 46. Then, the processed gear on the cradle 91 is pushed out to the processed gear stock portion 46 by the pusher 93.

  The gear finishing device having the above-described configuration in which the above operation is repeated can reduce the non-cutting time, that is, the time from the stop of rotation of the cutter to the start of rotation. In the actual gear finishing device according to the present invention, a non-cutting time (work changing time) of 1 second is achieved.

  As shown in FIGS. 4 and 16, the gear finishing device can include a cleaning mechanism 100. The cleaning mechanism 100 removes shavings by spraying a cleaning liquid onto the processed gears from the spray nozzles 101 and 102. The injection nozzles 101 and 102 are fixed to the indexing table 9. A cleaning liquid supply path 103 communicating with the spray nozzles 101 and 102 is provided in the indexing table 9. The supply receiving port 104 of the cleaning liquid supply path receives supply of the cleaning liquid from the cleaning liquid supply port unit 105. The cleaning liquid supply port 105 can be moved toward and away from the supply receiving port 104 by a linear actuator 106, and the linear actuator 106 is driven when the supply receiving port 104 comes to a position coincident with the discharge port of the cleaning liquid supply port 105. Then, the opening peripheral edge of the supply receiving port 104 and the opening peripheral edge of the cleaning liquid supply port 105 are surface-bonded to enable supply of the cleaning liquid.

  In the above embodiment, a so-called vertical type in which the axis of the cutter is higher than the axis of the tail pusher is shown, but a horizontal type in which the rotary axis of the rotary table and the cutter axis are parallel to each other at the same height position may be used. . Further, the pair of tail pushers is not limited to the symmetrical arrangement of the swivel axis, and three or more can be provided at equal angular intervals around the swivel axis of the swivel table. Also, the position of the second hand 43 is arranged at the position of the third hand 44, the position of the third hand 44 is arranged at the position of the second hand 43, and the arrangement of the second hand 43 and the third hand 44 is arranged. It is also possible to replace each other.

It is a schematic front view which shows suitable embodiment of the gear finishing apparatus which concerns on this invention. It is a schematic side view of the gear finishing apparatus of FIG. It is sectional drawing of the gear finishing apparatus of FIG. 1, Comprising: It is sectional drawing which follows the III-III line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a schematic whole perspective view showing one embodiment of a gear conveyance device which is a component of the present invention. It is a front view showing one embodiment of the 1st hand which is a component of the present invention. It is a perspective view which expands and shows a part of FIG. It is a side view which shows one Embodiment of the 2nd hand which is a component of this invention. FIG. 8 is an enlarged perspective view showing another part of FIG. 7. FIG. 10 is a partial cross-sectional side view showing still another part of the transfer apparatus of FIG. 7. It is a fragmentary sectional side view which expands and shows a part of FIG. It is a fragmentary sectional side view which shows the operation state of FIG. FIG. 8 is an enlarged perspective view showing another part of FIG. 7. It is sectional drawing which follows the XVI-XVI line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gear finishing apparatus 2 Cutter 3 Revolving table 4, 4 Tail pusher 40 Workpiece gear stock part 41 Rail 42 with a rack 1st hand 43 2nd hand 44 3rd hand 45 4th hand
W Work gear

Claims (3)

A gear to be machined that is rotatably supported by a center pusher that is arranged so as to be movable relative to each other on a coaxial line is meshed with a cutter, and the cutter is driven to rotate to rotate the gear and perform finish cutting. A gear finishing device,
A gear finishing device comprising: a swivel table; and at least two mandrel supported by the swivel table around a swivel axis of the swivel table and each of which can be independently driven. A rotation restraint mechanism for restraining the work gear to be non-rotatable and maintaining a phase determination state of the work gear when the work gear supported by the mandrel is in a non-engagement position with the cutter; The gear finishing device according to claim 1, wherein The gear finishing device further includes a gear conveying device that carries the processed gear from the processed gear stock portion to the core pusher and unloads the processed gear from the core pusher,
The gear conveyor is
A rail with a rack that receives the workpiece gear from the workpiece gear stock portion and determines the phase;
A first hand for carrying out the gear to be processed from a predetermined position of the rail with the rack;
A second hand that receives the workpiece gear from the first hand and passes it to the tail pusher;
A third hand for receiving the processed gear from the tailstock,
A fourth hand for receiving the processed gear from the third hand and carrying it out;
With
The first hand and the fourth hand are connected, the second hand and the third hand are connected, and the moving direction of the first hand and the fourth hand is orthogonal to the moving direction of the second hand and the third hand. The 4th hand receives the processed gear from the 3rd hand and at the same time the 2nd hand passes the gear to be processed to the center pusher, and the 1st hand passes the gear to be processed to the 2nd hand and the 4th hand processes. The gear finishing device according to claim 1, wherein the gear finishing device is configured to carry out a used gear.

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