JP2014079793A - Rotation plastic processing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation plastic processing apparatus capable of improving plastic processing accuracy.SOLUTION: A synchronous rotation mechanism S of a rotation plastic processing apparatus comprises: a synchronous gear 8; a transmission gear 9; a decentering coupling 10; and a transmission gear position holding mechanism K. In the decentering coupling 10, a drive plate 14 is concentrically connected with the transmission gear 9 to be capable of integrally rotating with the transmission gear 9, and a driven plate 12 is concentrically connected with a roller 4 to be capable of integrally rotating with the roller 4. The decentering coupling 10 includes a rotation axis A2 of the driven plate 12 arranged in parallel with a main shaft 1. A press mechanism D is provide to move the roller 4 and the driven plate 12 while the rotation axis A2 of the roller 4 passes through the perpendicular line α between shaft centers. The transmission gear position holding mechanism K holds the transmission gear 9 in a state that engages with the synchronous gear 8 at the position where the rotation axis A4 of the transmission gear 9 is biased from the perpendicular line α between shaft centers α by a determined distance in a direction orthogonal to the perpendicular line α between shaft centers α.

Description

  The present invention includes a material support portion that is rotationally driven by a rotational drive means around a main shaft and a roller that plastically processes the material to be processed while supporting a material to be processed having a circular outer peripheral surface as viewed in the axial direction. A pressing mechanism that moves in a direction perpendicular to the main shaft and presses the roller against the material to be processed, and a synchronous rotation mechanism that transmits the rotation of the main shaft to the roller so as to rotate the roller synchronously with the material support portion are provided. The present invention relates to a rotary plastic processing apparatus.

  Such a rotary plastic working apparatus rotates the material support part that supports the work material, and presses the roller against the work material by the pressing mechanism in a state in which the roller rotates synchronously with the material support part by the synchronous rotation mechanism. Thus, the workpiece material is plastically processed. For example, when manufacturing a gear having external teeth, the external teeth are formed on the outer peripheral surface of a disk-shaped material, which is an example of a material to be processed, using a roller having an outer tooth forming die on the outer peripheral surface. To do.

In such a rotary plastic working apparatus, conventionally, as a synchronous rotation mechanism, a synchronous gear that rotates together with the material support portion, a driven gear that rotates together with the roller and meshes with the synchronous gear, and the roller and the driven gear as the main shaft. It is configured to include a pressing mechanism that integrally moves in the orthogonal direction to engage the driven gear with the synchronous gear and simultaneously presses the roller against the workpiece (see, for example, Patent Document 1). ).
And the workpiece material was plastically processed by making the pressing mechanism work.

Japanese Patent No. 3429711

By the way, in order to accurately rotate the roller synchronously with the material support portion, it is necessary to mesh the driven gear sufficiently deeply with the synchronous gear and accurately transmit the rotation of the synchronous gear to the driven gear.
However, in the conventional rotary plastic processing apparatus, since the roller and the driven gear are integrally moved in a direction orthogonal to the main shaft, the roller moves to a position where the processing is completed after contacting the workpiece. The driven gear also moves in the same manner, and the driven gear and the synchronous gear do not mesh deeply at the beginning of processing, resulting in backlash, and as a result, the processing accuracy for plastic processing of the workpiece may be deteriorated. It was.

  Therefore, in order to solve the problem that the roller as described above is pressed too strongly against the workpiece, a comparative example using a so-called eccentric coupling 40 is assumed as shown in FIG. FIG. 13 shows a comparative example of the rotary plastic working apparatus when the eccentric coupling 40 is used, and FIG. 13 (a) is a front view of the periphery of the eccentric coupling 40 in the rotary plastic working apparatus. 13 (b) is a transverse plan view.

  As shown in FIG. 13, the eccentric coupling 40 includes a ring-shaped driven plate 41 and a plurality of (for example, 3) rotation axes A3 that are eccentric with the rotation axis A2 of the driven plate 41 and that can transmit rotation to the driven plate 41. The ring-shaped intermediate plate 42 connected to the driven plate 41 by the driven side link 44 and the rotation axis A4 are eccentric from the rotation axis A3 of the intermediate plate 42, and the rotation can be transmitted to the intermediate plate 42. A ring-shaped drive plate 43 connected to the intermediate plate 42 by a plurality of (for example, three) drive-side links 45 is provided.

The plurality of driven side links 44 are dispersedly arranged around the rotation axis A2 of the driven plate 41 in a state of being parallel to each other, and the plurality of driving side links 45 are also in a state of being parallel to each other. Distributed around the center A4. One end of each driven side link 44 and one end of each drive side link 45 are pivotally supported by the intermediate plate 42 at a concentric pivot axis, and the other end of each driven side link 44 is pivotally supported by the driven plate 41. In addition, the other end of each drive side link 45 is pivotally supported by the drive plate 43. The distance between the pivot axes on both sides in each of the plurality of driven links 44 and the distance between the pivot axes on both sides in each of the plurality of drive links 45 are all the same. That is, the eccentric coupling 40 is a so-called Schmidt coupling, and the rotation of the drive plate 43 can be transmitted synchronously to the driven plate 41 via the intermediate plate 42 and is also driven by the rotational axis A4 of the drive plate 43. The rotation axis A2 of the plate 41 is configured to be eccentric.
The transmission gear 9 is concentrically connected to the drive plate 43 on the opposite side to the intermediate plate 42 side so as to rotate integrally therewith, and the driven plate 41 is opposite to the intermediate plate 42 side. In addition, the roller 4 is concentrically connected to the rotation axis A2 via the movable shaft 46 so as to be integrally rotatable.
That is, the rotational axis A4 of the transmission gear 9 can be eccentric with the rotational axis A2 of the roller 4.

Then, the pressing mechanism (not shown) is connected to the roller 4 and the driven plate 41 that are concentrically connected so as to be integrally rotatable. The rotation axis A2 of the roller 4 is the rotation axis A2 of the roller 4 and the rotation axis of the main shaft 1 It is provided so as to move in a state where it passes on a vertical axis α connecting the centers A1.
Further, the transmission gear position holding mechanism (not shown), the transmission gear 9, and the material support portion (not shown) around the main shaft at a position where the rotational axis A4 of the transmission gear 9 is located on the axis-centered perpendicular α. ) And a synchronous gear (not shown) that rotates integrally therewith.
Then, in a state where the transmission gear 9 is engaged with the synchronous gear by the transmission gear position holding mechanism, the workpiece 4 is plastically processed by pressing the roller 4 against the workpiece (not shown) by the pressing mechanism.
That is, with the transmission gear 9 meshed sufficiently deeply with a synchronous gear (not shown), the roller 4 that has already been rotated synchronously with the material support portion is moved closer to the workpiece material from a position away from the workpiece material. Since it can be pressed against the workpiece, it is possible to prevent backlash from occurring in the transmission gear 9 from the beginning when the roller 4 is pressed against the workpiece.

However, in the case of this comparative example, the rotation of the drive plate 43 that rotates concentrically and integrally with the synchronous gear as the roller 4 that rotates synchronously with the material support portion moves toward the main shaft 1 along the axis-centered perpendicular α. The axis A4 and the rotational axis A2 of the driven plate 41 that rotates concentrically with the roller 4 approach each other, and during or at the end of processing, the rotational axis A4 of the drive plate 43 and the rotational axis A2 of the driven plate 41 May be almost concentric.
When the rotational axis A4 of the drive plate 43 and the rotational axis A2 of the driven plate 41 are concentric, the pivotal shafts on both sides of the driven side link 44 in the direction of the rotational axis of the driven plate 41 (shown in the figure). A straight line (not shown) that connects the pivot axes (not shown) on both sides of the drive side link 45 is in a parallel state. That is, since one pivot axis of the driven side link 44 and one pivot axis of the drive side link 45 are concentric, the rotation axis A4 of the drive plate 43 and the rotation axis A2 of the driven plate 41 are Is concentric, the straight line connecting the pivot axes on both sides of the driven side link 44 and the straight line connecting the pivot axes on both sides of the drive side link 45 are parallel to each other when the driven plate 41 is viewed in the direction of the rotational axis. Overlap.
When the straight line connecting the pivot axes on both sides of the driven side link 44 and the straight line connecting the pivot axes on both sides of the drive side link 45 are in parallel (overlapping in this comparative example), the rotation axis of the roller 4 The relative positional relationship between the center A2 and the rotational axis A4 of the transmission gear 9 may deviate from the intended relationship, and the plastic processing accuracy may decrease, and it is difficult to improve the plastic processing accuracy of the workpiece.

A description will be added based on FIG. However, FIG. 14 shows a case where four driven side links 44 and four driving side links 45 are provided.
As shown in FIG. 14A, when the straight line connecting the pivot axes on both sides of the driven side link 44 and the straight line connecting the pivot axes on both sides of the drive side link 45 overlap in parallel, FIG. As shown in b), the pivot axis of the driven side link 44 to the driven plate 41 and the pivot axis of the drive side link 45 to the drive plate 43 are substantially concentric. Then, the intermediate plate 42 that is not directly coupled to either the drive plate 43 or the driven plate 41 (connected only via the driven side link 44 and the driven side link 44) is the driven plate 41 in the driven side link 44. It is possible to oscillate with the pivot axis of the pivot and the pivot axis of the drive side link 45 to the drive plate 43 as the axis. As a result, as shown in FIG. 14 (b), the rotational axis A3 of the intermediate plate 42 deviates from a predetermined position, and as a result, as shown in FIG. 14 (c), for example, the rotational axis of the drive plate 43 The center A4 moves to a position deviated from the axis-to-axis perpendicular α that should be originally positioned. Then, the position at which the transmission gear 9 concentrically rotating integrally with the drive plate 43 and the synchronous gear rotating concentrically with the main shaft 1 is shifted from the original position (position on the interaxial center α). Instantly, the phase around the rotation axis A1 of the main shaft 1 and the molding die on the outer peripheral surface of the roller 4 (for example, an external tooth molding die) in a processed part (for example, external teeth) that has been molded into the workpiece material so far The relationship with the phase around the rotation axis A2 of the roller 4 at this time is deviated from the relationship so far, and the plastic working accuracy is lowered.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a rotary plastic working apparatus capable of improving the working accuracy.

In order to achieve the above object, a rotary plastic working apparatus according to the present invention is a material that is rotationally driven by a rotational drive means around a main shaft in a state of supporting a work material having a circular outer peripheral surface as viewed in the axial direction. A support unit, a pressing mechanism for plastically processing a workpiece material in a direction perpendicular to the main shaft, and pressing the roller against the workpiece material; and the roller to rotate synchronously with the material support unit, A rotary plastic working apparatus provided with a synchronous rotation mechanism for transmitting the rotation of the main shaft to the roller, the characteristic configuration is
The synchronous rotation mechanism is
A synchronous gear that rotates integrally with the material support around the main shaft;
A transmission gear arranged in mesh with the synchronous gear;
A driven plate, an intermediate plate connected to the driven plate by a plurality of driven links so that the rotational axis and the rotational axis of the driven plate are eccentric and transmit rotation to the driven plate, and rotation of the intermediate plate An eccentric coupling comprising a drive plate connected to the intermediate plate by a plurality of drive side links so that the shaft center and the rotational axis are eccentric and capable of transmitting rotation to the intermediate plate;
A transmission gear position holding mechanism that holds the position of the transmission gear in a state of meshing with the synchronous gear;
In the eccentric coupling, the drive plate is concentrically connected to the transmission gear so as to be integrally rotatable, and the driven plate is concentrically connected to the roller so as to be integrally rotatable. Provided in a posture in which the rotational axis of the driven plate is parallel to the main axis;
The pressing mechanism includes a concentric roller and the driven plate that are connected so as to be integrally rotatable, and a rotation center of the roller connects a rotation axis of the roller and a rotation axis of the main shaft. It is provided to move while passing on the line,
The transmission gear position holding mechanism moves the transmission gear to the synchronous gear at a position where the rotational axis of the transmission gear is biased by a set amount in a direction perpendicular to the axis-centered perpendicular from the axis-centered perpendicular. It is in the point comprised so that it may hold | maintain in the state engaged.

According to the above characteristic configuration, the position of the transmission gear is held in a state where the transmission gear is engaged with the synchronous gear by the transmission gear position holding mechanism, so that the rotation of the material support portion is synchronously transmitted to the transmission gear via the synchronous gear. Thus, the transmission gear rotates in synchronization with the material support portion. The drive plate rotates together with the transmission gear, and the rotation of the drive plate is synchronously transmitted to the driven plate via a plurality of drive side links, intermediate plates, and a plurality of driven side links. The rollers that are concentrically connected so as to be integrally rotatable rotate synchronously with the material support portion in a state in which the rotation axis can be eccentric with the rotation axis of the drive plate (that is, transmission gear).
Since the rotation axis of the roller can be eccentric with the rotation axis of the transmission gear, the material is supported by the pressing mechanism while the rotation axis of the transmission gear rotating in synchronization with the material support is held at a fixed position. A roller that rotates synchronously with the support portion can be moved toward the main axis along the perpendicular line between the axis centers.
In other words, with the transmission gear meshed with the synchronous gear sufficiently deeply, the roller that is already rotating synchronously with the material support part is pressed against the work material from a position away from the work material, against the work material. Therefore, it is possible to prevent the transmission gear from causing backlash from the beginning when the roller is pressed against the workpiece material, and the processing accuracy of the workpiece material can be improved.

In addition, the transmission gear is held in a state where it is meshed with the synchronous gear at a position where the rotational axis is deviated by a set amount in a direction perpendicular to the axis-to-center perpendicular from the axis-to-axis perpendicular. While the roller that is already rotating synchronously with the material support portion is moved toward the main shaft along the axis center perpendicular line by the mechanism, the rotation axis of the drive plate and the roller that rotate concentrically and integrally with the synchronous gear The rotational axis of the driven plate that rotates concentrically and integrally is maintained in a state of being separated in a direction perpendicular to the perpendicular between the axial centers.
When the rotation axis of the drive plate and the rotation axis of the driven plate are separated from each other in a direction perpendicular to the axis-to-axis perpendicular, the pivot shafts on both sides of the driven side link are viewed in the direction of the rotation axis of the driven plate. When the straight line connecting the centers intersects with the straight line connecting the pivot axes on both sides of the drive side link (hereinafter referred to as “the state where the longitudinal direction of the driven side link and the longitudinal direction of the drive side link intersect”) Is).
Therefore, the longitudinal direction of the driven side link and the drive link during the period from when the roller rotating synchronously with the material support unit is pressed against the material to be processed from the position apart from the material to be processed and pressed against the material to be processed Can be maintained so that the longitudinal direction of the shaft intersects with each other, and the pivot axis of the driven side link to the driven plate and the pivot axis of the drive side link to the drive plate are prevented from being concentric. can do.
As a result, the wobbling of the rotation axis of the intermediate plate can be suppressed during processing, and the relative positional relationship between the rotation axis of the driven plate and the rotation axis of the drive plate, that is, the rotation axis of the roller. Since it is possible to prevent the relative positional relationship between the rotation axis of the transmission gear and the transmission gear from deviating from the intended relationship, the processing accuracy of the workpiece can be improved.
In short, it is possible to provide a rotary plastic processing apparatus that can improve the processing accuracy.

According to a further feature of the rotary plastic working apparatus according to the present invention, the eccentric coupling is inserted through the ring-shaped intermediate plate, the drive plate and the transmission gear, and is concentrically and integrally rotated with the driven plate. Composed of movable shafts connected to each other,
A portion of the movable shaft that passes through the transmission gear is concentrically connected to the roller so as to be integrally rotatable, and the movable shaft is rotatably supported by bearings at both ends in a posture parallel to the main shaft. Provided,
The pressing mechanism is provided such that the movable shaft moves in a state where the rotation axis passes through the perpendicular line between the axes.

According to the above characteristic configuration, the movable shaft that supports the roller concentrically and integrally so as to be integrally rotatable is moved by the pressing mechanism toward the main shaft in a state in which the rotation axis passes on the axis-center perpendicular line.
The movable shaft that supports the roller concentrically so as to rotate integrally is rotated synchronously with the material support portion with both ends thereof supported by the support member via the bearing, so that it is possible to suppress roller blurring. This can further improve the processing accuracy of the workpiece material.
In addition, when the roller is pressed against the work material, a shearing force acts in the direction perpendicular to the rotational axis of the roller, but the shearing force is supported by a movable shaft supported at both ends by a bearing. Roller blurring can be further suppressed.
Therefore, while using an eccentric coupling that can eccentrically rotate the rotation shaft center of the transmission gear and the rotation shaft center of the roller, the eccentric coupling includes a movable shaft that supports the roller so that it can rotate integrally and concentrically. By adopting a configuration in which both ends of the movable shaft are synchronously rotated with the material support portion while being supported by bearings, it is possible to further suppress roller blurring, thereby further improving the processing accuracy of the material to be processed. Can do.

According to a further feature of the rotary plastic working apparatus according to the present invention, an outer tooth forming die is provided on the outer peripheral surface of the roller,
The present invention resides in that external teeth are formed on the outer peripheral surface of the workpiece material to produce a gear having external teeth.

According to the above characteristic configuration, the external tooth forming die of the roller in the rotating state is pressed against the work material supported by the material support portion in the rotating state, so that the external teeth are formed on the outer peripheral surface of the work material. Thus, a gear having external teeth is manufactured.
Therefore, the processing accuracy of the gear having the external teeth can be improved.

According to a further feature of the rotary plastic working apparatus according to the present invention, a workpiece supported by the material support portion is moved by moving a holding member that can rotate concentrically with the main shaft toward the material support portion. A material holding mechanism clamped by the material support part;
The material holding mechanism is operated to execute a material holding process for holding the workpiece material between the material support portion and the holding member, the pressing mechanism is operated, and the transmission gear is held by the transmission gear position holding mechanism. Control means is provided for executing a processing step of plastic processing the workpiece material by the roller in a state of being engaged with the synchronous gear.

According to the above characteristic configuration, the material holding step of holding the workpiece material between the material support portion and the holding member is performed, and the roller that rotates in synchronization with the material support portion is covered with the transmission gear meshed with the synchronization gear. A machining process is performed in which the workpiece material is plastically pressed by pressing against the workpiece material from a position away from the workpiece material.
Accordingly, the process of processing the material to be processed so as to improve the processing accuracy is automatically executed sequentially.

1 is a partially cutaway front view showing the overall configuration of the rotary plastic working apparatus according to the first embodiment. The figure which shows the eccentric coupling which concerns on 1st Embodiment The figure which shows the eccentric coupling which concerns on 1st Embodiment The figure which shows a Y direction position adjustment part The figure explaining the manufacture procedure of the gear which has the external teeth concerning a 1st embodiment. The figure explaining the manufacture procedure of the gear which has the external teeth concerning a 1st embodiment. The figure explaining the manufacture procedure of the gear which has the external teeth concerning a 1st embodiment. The figure explaining the manufacture procedure of the gear which has the external teeth concerning a 1st embodiment. The figure which shows the general whole structure and eccentric coupling of the rotary plastic working apparatus which concerns on 2nd Embodiment. Transverse plan view showing the eccentric coupling according to the second embodiment Transverse plan view around the material support and rollers in the rotary plastic processing machine A perspective view showing a gear having a disk-shaped material and external teeth The figure which shows the principal part of the rotary plastic working apparatus which concerns on the comparative example at the time of using an eccentric coupling. Cross-sectional plan view showing the main part of a rotary plastic working apparatus according to a comparative example using an eccentric coupling

Hereinafter, based on the drawings, an embodiment when the present invention is applied to a rotary plastic working apparatus for producing a gear having external teeth will be described.
[First Embodiment]
First, based on FIG. 1, the whole structure of the rotary plastic working apparatus of 1st Embodiment is demonstrated.
As shown in FIG. 1, the rotary plastic working device is a rotary drive device around the main shaft 1 in a state of supporting a disk-shaped material (an example of a work material having a circular outer peripheral surface as viewed in the axial direction). An example of rotation driving means) The material support portion 3 that is rotationally driven by 2 and the roller 4 that plastically processes the disk-shaped material W are moved in a direction perpendicular to the main shaft 1 to press the roller 4 against the disk-shaped material W. A mechanism D and a synchronous rotation mechanism S that transmits the rotation of the main shaft 1 to the roller 4 are configured to rotate the roller 4 synchronously with the material support portion 3.
Further, in the rotary plastic working apparatus, a pressing member 5 (an example of a holding member) that can rotate concentrically with the main shaft 1 is moved toward the material support portion 3 to be supported by the material support portion 3. A workpiece holding mechanism (an example of a material holding mechanism) H that holds W between the pressing member 5 and the material support portion 3 and a control portion 7 that controls the operation of the rotary plastic working apparatus are provided.

  As shown in FIG. 11, the rotary plastic working apparatus of the first embodiment is provided with an external tooth forming die 4m on the outer peripheral surface of the roller 4, and on the outer peripheral surface of the disk-shaped material W, as shown in FIG. The external teeth Wo are formed to produce a gear W (hereinafter sometimes simply referred to as a gear) W having the external teeth Wo. 12A is a perspective view of the disk-shaped material W before plastic working, and FIG. 12B is a perspective view of the gear W. As shown in FIG. 12A, the disc-shaped material W has a circular outer peripheral surface as viewed in the axial direction, and has an axial hole Wh that is concentric with and penetrates the axial center. The length of the external tooth forming die 4m of the roller 4 (corresponding to the length in the axial direction) is set to be slightly longer than the target length of the external teeth formed on the outer peripheral surface of the disc-shaped material W. Yes.

  In the following description, as shown in FIG. 1, the direction along the rotation axis A1 of the main shaft 1 is the Z direction, the direction orthogonal to the rotation axis A1 of the main shaft 1 is the X direction, the Z direction, and the X direction. The direction orthogonal to both directions may be described as the Y direction. Further, in the Z direction, the direction approaching the base end of the main shaft 1 (the end connected to the rotary drive device 2) is defined as the -Z direction, and the direction away from the base end of the main shaft 1 is defined as the + Z direction. In the X direction, a direction approaching the rotation axis A1 of the main shaft 1 is defined as a -X direction, and a direction away from the rotation axis A1 of the main shaft 1 is defined as a + X direction.

As shown in FIG. 1 to FIG. 3, in the present invention, the synchronous rotation mechanism S is provided with a synchronous gear 8 that rotates integrally with the material support portion 3 around the main shaft 1 and a transmission that is arranged in mesh with the synchronous gear 8. The gear 9, the driven plate 12, and the rotation axis A <b> 2 and the rotation axis A <b> 3 of the driven plate 12 are eccentric and connected to the driven plate 12 by a plurality of driven links 15 so that rotation can be transmitted to the driven plate 12. A plate 13 and a drive plate 14 connected to the intermediate plate 13 by a plurality of drive side links 16 so that the rotation axis A3 and the rotation axis A4 of the intermediate plate 13 are eccentric and can transmit the rotation to the intermediate plate 13. The eccentric coupling 10 is provided, and a transmission gear position holding mechanism K that holds the position of the transmission gear 9 in a state of meshing with the synchronous gear 8 is provided.
In the eccentric coupling 10, the drive plate 14 is concentrically connected to the transmission gear 9 so as to be integrally rotatable, and the driven plate 12 is concentrically connected to the roller 4 so as to be integrally rotatable. 10 is provided with a posture in which the rotational axis A2 of the driven plate 12 is parallel to the main shaft 1, and the pressing mechanism D rotates the roller 4 and the driven plate 12 which are concentrically connected so as to be integrally rotatable. The shaft center A2 is provided so as to move in a state of passing on the axis-center perpendicular line α connecting the rotation axis A2 of the roller 4 and the rotation axis A1 of the main shaft 1, and the transmission gear position holding mechanism K is provided with the transmission gear. 9 at a position where the rotational axis A4 of the transmission gear 9 is biased in the Y direction set amount (specific example of the set amount) in a direction perpendicular to the axis center perpendicular α from the axis center perpendicular α. 8 meshed In is configured to hold. That is, the X direction is a direction along the axis-centered perpendicular α. In the first embodiment, the axis-to-center perpendicular α is defined between the rotation axis A2 of the roller 4 and the rotation axis A1 of the main shaft 1 that are located at a predetermined start position Ps (see FIG. 6) at the start of movement. Defined as a connecting perpendicular.

Here, as described above, the rotational axis of the concentric roller 4 and the rotational axis of the driven plate 12 are both indicated by the reference numeral A2, and the rotational axis of the concentric drive plate 14 and the rotation of the transmission gear 9 are rotated. Both axes are denoted by reference numeral A4.
2 and FIG. 3 are views showing in detail the periphery of the eccentric coupling 10, FIG. 2 (a) is a perspective view, FIG. 2 (b) is an exploded perspective view, and FIG. ) Is a partially cutaway front view, and FIG. 3B is a cross-sectional plan view.

Next, description will be added about each part of the rotary plastic working apparatus.
As shown in FIG. 1, a main shaft 1 is provided on a gantry (not shown) so as to be rotatable around a rotation axis A <b> 1 along the vertical direction, and a rotary drive device 2 such as an electric motor is provided on the main shaft 1. The material support 3 is attached to the tip of the main shaft 1, and a synchronous gear 8 is provided on the outer peripheral surface of the main shaft 1 below the material support 3. The material support portion 3 includes a cylindrical main body portion 3b and a columnar insertion shaft portion 3a having a smaller diameter than the main body portion 3b projecting concentrically from the distal end surface of the main body portion 3b. The part 3a can be fitted in the shaft hole Wh of the disk-shaped material W. The material support portion 3 is attached to the tip of the main shaft 1 in a state of being concentric with the rotation axis A1.
That is, the disk-shaped material W is inserted into the shaft hole Wh through the insertion shaft portion 3a of the material support portion 3 and is in contact with the distal end surface of the main body portion 3b of the material support portion 3. Are mounted concentrically with the rotational axis A1 of the main shaft 1.
When the rotation driving device 2 is operated, the material support portion 3 and the synchronous gear 8 rotate concentrically and integrally around the rotation axis A1 of the main shaft 1.

As shown in FIG. 1, the workpiece holding mechanism H includes a pressing member 5 and a workpiece holding hydraulic cylinder 6 that reciprocally drives the pressing member 5 along the rotation axis A1 direction (Z direction) of the main shaft 1. The pressing member 5 is disposed so as to face the material support portion 3. The pressing member 5 is rotatably supported at the tip of the cylinder rod of the work holding hydraulic cylinder 6 via a bearing (not shown) so as to be rotatable concentrically with the rotational axis A1 of the main shaft 1.
By operating the work holding hydraulic cylinder 6 so as to press the pressing member 5 against the disk-shaped material W mounted on the material support portion 3, the disk-shaped material W is held between the material support portion 3 and the pressing member 5. It is configured.
And it is comprised so that the main shaft 1 may be rotationally driven by the rotation drive device 2, and the disk-shaped raw material W may be rotated integrally with the raw material support part 3 in the state clamped by the raw material support part 3 and the press member 5. Yes.

The eccentric coupling 10 will be described with reference to FIGS.
In the first embodiment, the driven plate 12, the intermediate plate 13, and the drive plate 14 are each configured in a ring shape.
The three driven side links 15 are distributed around the rotation axis A2 of the driven plate 12 in a state of being parallel to each other, and one end of each driven side link 15 is rotated by the rotation axis A3 of the driven plate 12. It is pivotally supported by an intermediate plate 13 parallel to the axis A <b> 2 and the other end is pivotally supported by the driven plate 12. In addition, the three drive side links 16 are arranged around the rotation axis A4 of the drive plate 14 in a state of being parallel to each other, and one end of each drive side link 16 is pivotally supported by the intermediate plate 13 and the other end. However, the rotational axis A4 is pivotally supported by the drive plate 14 parallel to the rotational axis A2 of the driven plate 12.

In the first embodiment, one end of each driven side link 15 and one end of each drive side link 16 are pivotally supported on the intermediate plate 13 by a concentric pivot axis a1. Here, a pivot axis in which the other end of each driven side link 15 is pivotally supported by the driven plate 12 is indicated by reference numeral a <b> 2, and the other end of each drive side link 16 is pivotally supported by the drive plate 14. The pivot axis is indicated by reference numeral a3. The distance between the pivot axes a1 and a2 on both sides of the three driven links 15 and the distance between the pivot axes a1 and a3 on both sides of the three drive links 16 are all the same. is there.
Although illustration is omitted, when the rotational axis A2 of the driven plate 12 and the rotational axis A4 of the drive plate 14 are concentric, the driven link 15 of the driven link 12 is viewed in the rotational axis direction (Z direction) of the driven plate 12. A straight line (not shown) connecting the pivot axes a1 and a2 on both sides and a straight line (not shown) connecting the pivot axes a1 and a3 on both sides of the drive side link 16 are configured to overlap in a parallel state. .

In the eccentric coupling 10, the relative positions of the rotation axis A4 of the drive plate 14 and the rotation axis A2 of the driven plate 12 with respect to the rotation axis A3 of the intermediate plate 13 are configured to be freely changeable. The rotation axis A4 and the rotation axis A2 of the driven plate 12 are configured to be eccentric.
When the drive plate 14 rotates, the rotation of the drive plate 14 is synchronously transmitted to the intermediate plate 13 by the three drive side links 16, and the rotation of the intermediate plate 13 is driven by the three driven side links 15. Since it is transmitted synchronously to the plate 12, when the drive plate 14 rotates, the intermediate plate 13 and the driven plate 12 rotate synchronously with the drive plate 14.
That is, the eccentric coupling 10 in the first embodiment is configured by a so-called Schmitt coupling.

The eccentric coupling 10 includes a material support portion in which the alignment direction of the driven plate 12, the intermediate plate 13 and the drive plate 14 is along the direction of the rotation axis A1 of the main shaft 1, and the driven plate 12 is in the direction of the rotation axis A1 of the main shaft 1. 3 is arranged in a posture facing the 3 side.
In the eccentric coupling 10, the drive plate 14 is concentrically connected to the transmission gear 9 on the side opposite to the side connected to the intermediate plate 13, and the driven plate 12 is connected to the transmission gear 9. The roller 4 is concentrically connected to the roller 4 on the side opposite to the side connected to the intermediate plate 13 so as to be integrally rotatable.

The roller 4 to which the driven plate 12 is concentrically connected to the rotation axis A2 so as to be integrally rotatable is supported by a roller rotation support 32 via a roller bearing 31 so as to be rotatable.
A roller rotation support body 32 that rotatably supports the roller 4 passes through a pair of guide rails 33 fixedly installed on a gantry (not shown), and the rotation axis A2 of the roller 4 passes on the axis-center perpendicular α. In this state, the screw shaft 34 is supported by the pair of guide rails 33 and supported by the pair of guide rails 33, and a screw shaft 34 having a rotational axis centered along the axis-to-center perpendicular line α is screwed. Has been.
Then, by rotating the screw shaft 34 forward and backward, an X direction drive such as a pulse motor that reciprocally moves the roller 4 and the driven plate 12 concentrically and integrally rotated at the rotation axis A2 in the X direction. A device 35 is provided. That is, when the roller 4 reciprocates in the X direction, the roller 4 reciprocates in a state where the rotation axis A2 of the roller 4 passes on the axis-centered perpendicular α.

  That is, the X direction driving device 35 is configured to function as a pressing mechanism D that moves the roller 4 in a direction (X direction) orthogonal to the main shaft 1 and presses the roller 4 against the disk-shaped material W. Then, the pressing mechanism D moves the roller 4 and the driven plate 12 concentrically connected to the rotation axis A2 so as to be integrally rotatable in a state where the rotation axis A2 of the roller 4 passes over the axis-centered perpendicular α. It will be provided to do.

  Next, the transmission gear position holding mechanism K will be described. As shown in FIG. 1, in the first embodiment, the transmission gear position holding mechanism K is configured such that the drive plate 14 is concentric with the rotation axis A4. A transmission gear rotation support 37 that rotatably supports the transmission gear 9 that is coupled so as to rotate integrally with the transmission gear bearing 36, and a position of the transmission gear 9 that is rotatably supported by the transmission gear rotation support 37. Y-direction position adjustment unit 40 that adjusts (position of rotation axis A4) in a direction orthogonal to the axis-to-center perpendicular α and rotation axis A1 of main shaft 1 (that is, Y direction), and its Y-direction position adjustment unit A transmission gear holding hydraulic cylinder 38 is configured to move the transmission gear 9 whose position in the Y direction is adjusted by 40 along a direction parallel to the axis-to-center perpendicular α.

  As shown in FIG. 4, the Y-direction position adjustment unit 40 is supported by a base 41 attached to the tip of the cylinder rod of the transmission gear holding hydraulic cylinder 38 and movably in the Y direction with respect to the base 41. The movable table 42, four adjuster bolts 43 for reciprocating the movable table 42 in the Y direction, a fixed plate 44 that fixes the movable table 42 by sandwiching it with the base 41, and the movable table 42 as a base. 41 and six fixing bolts 45 for holding and fixing between the fixing plate 44 and the fixing plate 44. 4A is a perspective view of the Y-direction position adjusting unit 40, and FIG. 4B is an exploded perspective view of the Y-direction position adjusting unit 40.

  A transmission gear rotation support 37 that rotatably supports the transmission gear 9 is fixedly connected to the movable base 42 of the Y-direction position adjustment unit 40. The transmission gear holding hydraulic cylinder 38 is fixedly installed on a gantry (not shown) in a posture in which the cylinder rod can be expanded and contracted along a direction parallel to the axis-to-center perpendicular α, and the transmission gear holding hydraulic cylinder 38 A base 41 of the Y-direction position adjusting unit 40 is fixedly connected to the tip of the 38 cylinder rods.

Each adjuster bolt 43 passes through a screw insertion hole (not shown) of the movable base 42 and is screwed into the fixed plate 44. By rotating the four adjuster bolts 43 forward and backward, the movable base 42 is transferred to the transmission gear. The holding hydraulic cylinder 38 can be reciprocated in the Y direction with respect to the base 41 connected to the tip of the cylinder rod.
The movable base 42 is formed with two long holes 46 that can be inserted with the fixing bolts 45 and are long in the Y direction. Each of the fixing bolts 45 includes a screw insertion hole (not shown) of the fixed plate 44 and a long hole of the movable base 42. 46 is passed through and screwed into the base 41.

  Then, the movable base 42 is positioned at a predetermined position biased in the Y direction from the axial center vertical line α by the four adjuster bolts 43, the six fixing bolts 45 are tightened, and the transmission gear holding hydraulic cylinder 38. Thus, by holding the position of the transmission gear 9 in a state where it is pressed against the synchronous gear 8 and meshed, the transmission gear 9 can be connected to the rotation axis A4 of the transmission gear 9 in the Y direction from the centerline perpendicular α to the Y direction. It can be held in a state of being meshed with the synchronous gear 8 at a position where the set amount is biased.

  In the first embodiment, as shown in FIG. 6, the position of the rotation axis A4 of the transmission gear 9 in the direction of the rotation axis A4 of the transmission gear 9 is the rotation axis of the main shaft 1 (that is, the synchronous gear 8). In the circle centered on the center A1, the central angle β formed by the axis-centered perpendicular α is positioned on an extension line of a radius of, for example, 5 °, and the transmission gear 9 is set to a position where the transmission gear 9 meshes with the synchronous gear 8. ing.

Next, based on FIGS. 5-8, the control operation of the control part 7 when manufacturing a gear with this rotary plastic working apparatus is demonstrated. 5 is a partially cutaway front view of the periphery of the eccentric coupling 10 in the rotary plastic working apparatus. In each of FIGS. 6 to 8, (a) is the eccentric coupling 10 in the rotary plastic working apparatus. It is a partially cutaway front view of the periphery of, and (b) is a transverse plan view.
In addition, when the roller 4 is moved in the −X direction by the X-direction drive device 35 to form the disk-shaped material W, a start position Ps (position of the rotation axis A2 of the roller 4) at which the roller 4 is positioned at the start, An end position Pe (position of the rotational axis A2 of the roller 4) for finishing the molding is preset in the X direction and stored in the memory of the control unit 7.

In the first embodiment, as shown in FIGS. 5 and 6, the start position Ps is the rotational axis of the transmission gear 9 whose position is held in a state of being meshed with the synchronous gear 8 by the transmission gear position holding mechanism K. The rotational axis A2 is set at a position of the roller 4 that is offset in the X direction set amount (for example, 5 mm) on the opposite side to the main shaft 1 in the direction along the axis center perpendicular line α (X direction) with respect to A4. In a state where the roller 4 is located at the start position Ps, the roller 4 is separated from the disk-shaped material W supported by the material support portion 3 in a direction along the axis-centered perpendicular α.
Further, as shown in FIG. 8, the end position Pe is set at a predetermined position on the outer peripheral surface of the disk-shaped material W by pressing the outer tooth forming die 4m of the roller 4 in a rotating state against the outer peripheral surface of the disk-shaped material W. This is a position where the height external teeth Wo can be molded. For example, the rotation axis A4 of the transmission gear 9 whose position is held in a state of being engaged with the synchronous gear 8 by the transmission gear position holding mechanism K and the direction in which the rotation axis A2 is along the axis-center perpendicular line α (X direction) Is set to the position of the roller 4 at the same position.

That is, the state in which the roller 4 is located at the start position Ps (see FIGS. 5 and 6), the state in which the roller 4 is located at the end position Pe (see FIG. 8), and the state where the roller 4 is in the start position Ps and the end position Pe. The rotational axis A4 of the drive plate 14 is biased in the Y direction by a set amount in the direction (Y direction) perpendicular to the axis center vertical line α. Yes.
As shown in FIGS. 5 and 6, in the state where the roller 4 is located at the start position Ps, the rotational axis A <b> 2 of the driven plate 12 is perpendicular to the axial center line α with respect to the rotational axis A <b> 4 of the drive plate 14. The set amount in the X direction is biased to the opposite side of the main shaft 1 in the direction along the direction (X direction). As shown in FIG. 8, when the roller 4 is located at the end position Pe, the rotational axis A2 of the driven plate 12 is in a direction (X direction) along the rotational axis A4 of the drive plate 14 and the vertical axis α between the axes. At the same position.

  Accordingly, as shown in FIGS. 5 to 8, while the roller 4 moves from the start position Ps to the end position Pe, the pivot shafts on both sides of the driven side link 15 in the direction of the rotational axis A <b> 2 of the driven plate 12. The straight line (not shown) connecting the centers a1 and a2 and the straight line (not shown) connecting the pivot axes a1 and a3 on both sides of the drive side link 16 are maintained in an intersecting state. In the first embodiment, one end of each driven side link 15 and one end of each drive side link 16 are pivotally supported on the intermediate plate 13 by a concentric pivot axis a1. A straight line (not shown) connecting the pivot axes a1 and a2 on both sides of the driven side link 15 and a straight line (not shown) connecting the pivot axes a1 and a3 on both sides of the drive side link 16 when viewed in the direction of the center A2. Becomes V-shaped (hereinafter, “the driven-side link 15 and the drive-side link 16 may be described as V-shaped”).

As shown in FIGS. 5 to 8, before starting the production of the gear, the transmission gear 9 causes the transmission gear 9 to rotate the rotation axis A <b> 4 of the transmission gear 9 from the axis-center perpendicular line α to Y by the transmission gear holding hydraulic cylinder 38. It is held in a state where it is meshed with the synchronous gear 8 at a position shifted in the Y direction by a set amount in the Y direction.
As shown in FIG. 5, when the start command is instructed, the control unit 7 operates the X-direction drive device 35 to position the roller 4 at the start position Ps, and also operates the work supply device (not shown). Then, the disk-shaped material W to be processed is positioned at a position facing the material support 3 and the work holding hydraulic cylinder 6 is operated to move the pressing member 5 in the -Z direction as shown in FIG. Then, a work holding process (corresponding to the material holding process) for holding the disk-shaped material W between the material support portion 3 and the pressing member 5 is executed. Then, the disc-shaped material W is sandwiched between the material support portion 3 (specifically, the main body portion 3b) and the pressing member 5 in a state where the insertion shaft portion 3a of the material support portion 3 is inserted into the shaft hole Wh. The

Subsequently, as shown in FIG. 6, the control unit 7 is held in a state where the position of the transmission gear 9 is engaged with the synchronous gear 8, and the disc-shaped material W is moved by the material support unit 3 and the pressing member 5. While being held, the rotation driving device 2 is operated at a predetermined rotation speed. Then, the disk-shaped material W supported by the material support portion 3 rotates integrally with the material support portion 3, and the rotation of the main shaft 1 is synchronously transmitted to the roller 4 by the synchronous gear 8, the transmission gear 9 and the eccentric coupling 10. Thus, the roller 4 rotates in synchronization with the material support portion 3.
Subsequently, the control unit 7 operates the X-direction drive device 35 to move the roller 4 rotating in synchronization with the material support unit 3 at a predetermined speed along the axis-to-center perpendicular α as shown in FIG. A processing step of pressing the disc-shaped material W supported by the material support portion 3 and rotating integrally with the material support portion 3 is performed by moving in the −X direction. Then, the external tooth forming die 4m of the roller 4 in a rotating state comes into contact with the outer peripheral surface of the disk-shaped material W, and external teeth Wo start to be formed on the outer peripheral surface of the disk-shaped material W. The height of the tooth Wo gradually increases.

  Then, as shown in FIG. 8, the roller 4 reaches the end position Ps, the height of the external teeth Wo molded on the outer peripheral surface of the disk-shaped material W reaches a predetermined height, and the disk-shaped material W When molding is completed, the control unit 7 operates the X-direction drive device 35 to return the roller 4 to the start position Ps, then stops the rotation drive device 2, and then moves the work holding hydraulic cylinder 6 to its cylinder rod. And the workpiece discharging device (not shown) is operated to remove the manufactured gear from the material support portion 3.

  That is, the control unit 7 operates the workpiece holding mechanism H to execute a material holding step of clamping the disc-shaped material W between the material support unit 3 and the pressing member 5, and subsequently operates the pressing mechanism D, In the state where the transmission gear 9 is engaged with the synchronous gear 8 by the transmission gear position holding mechanism K, the processing step of plastic processing the disk-shaped material W by the roller 4 is executed.

Accordingly, with the transmission gear 9 engaged with the synchronous gear 8 sufficiently deeply, the roller 4 that has already been rotated synchronously with the material support portion 3 is brought close to the disk-shaped material W from a position away from the disk-shaped material W. Since the roller 4 can be pressed against the disk-shaped material W, the transmission gear 9 can be prevented from generating backlash from the beginning when the roller 4 is pressed against the disk-shaped material W, and the processing accuracy of the gear can be improved. .
In addition, each driven side link during the period from when the roller 4 that rotates synchronously with the material support portion 3 is pressed from the position separated from the disk-shaped material W to the disk-shaped material W and pressed against the disk-shaped material W is finished. 15 and each drive side link 16 can be maintained in a V-shaped state, so that the pivot axis a2 to the driven plate 12 in the driven side link 15 and the pivot to the drive plate 14 in the drive side link 16 are provided. It is possible to avoid concentricity with the support shaft center a3.
In the state where the roller 4 is pressed against the disk-shaped material W, a force acts in a direction perpendicular to the rotational axis A2 of the driven plate 12, but each driven side link 15 and each driving side link 16 is V If it is in the shape of a letter, it is possible to suppress the wobbling of the rotation axis A3 of the intermediate plate 13 during processing, so that the rotation axis A4 of the drive plate 14, that is, the rotation axis A4 of the transmission gear 9 can be suppressed. Can be prevented from deviating from the initial position (when the roller 4 starts to move), and the rotational axis A2 of the driven plate 12, that is, the rotational axis A2 of the roller 4 is deviated from the vertical axis α between the axes. Can be avoided, and the processing accuracy of the disk-shaped material W can be improved.
Therefore, the processing accuracy of the gear can be effectively improved.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described. This second embodiment is a description of another embodiment of the eccentric coupling 10, and the configuration other than the eccentric coupling 10 and the related configuration is described above. This is the same as in the first embodiment. Therefore, in order to avoid redundant description, the same constituent elements as those in the first embodiment and the constituent elements having the same functions are denoted by the same reference numerals, and the description thereof is omitted. Mainly, the eccentric coupling 10 and related constituent elements are omitted. Will be described.
As shown in FIGS. 9 and 10, in the second embodiment, the eccentric coupling 10 is inserted through the ring-shaped intermediate plate 13, the drive plate 14 and the transmission gear 9, and is concentric with the driven plate 12. The movable shaft 11 is configured so as to be integrally rotatable, and a portion of the movable shaft 11 passing through the transmission gear 9 is concentrically connected to the roller 4 so as to be integrally rotatable. The movable shaft 11 is connected to the main shaft 1. Are supported in a state where both ends are rotatably supported by the movable shaft bearing 21. Here, the rotational axis of the movable shaft 11 concentric with the rotational axis A2 of the driven plate 12 is also denoted by reference numeral A2.
The pressing mechanism D is provided so as to move on the movable shaft 11 in a state in which the rotational axis A2 passes through the axis-interval perpendicular α. Also in the second embodiment, the axis center perpendicular line α is a perpendicular line that connects the rotation axis A2 of the roller 4 and the rotation axis A1 of the main shaft 1 that are located at a predetermined start position (not shown) at the start of movement. Defined.

Based on FIGS. 9 and 10, the eccentric coupling 10 will be described. 9A is a partially cutaway front view showing a schematic overall configuration of the rotary plastic working apparatus, and FIG. 9B is an exploded perspective view of the eccentric coupling 10.
The driven plate 12 is attached to the movable shaft 11 in an outer fitting shape so as to be integrally rotatable around the rotation axis A2.
The drive plate 14 and the intermediate plate 13 are each configured in a ring shape having an inner diameter larger than that of the movable shaft 11, and the ring-shaped intermediate plate 13 is positioned on the outer peripheral portion of the movable shaft 11 (the movable shaft 11 is in the middle). And is connected to the driven plate 12 attached to the movable shaft 11 by the four driven side links 15 in a state in which the rotational axis A3 is parallel to the rotational axis A2 of the driven plate 12. In addition, the ring-shaped drive plate 14 is positioned on the outer peripheral portion of the movable shaft 11 (the movable shaft 11 is inserted through the drive plate 14), and the rotation axis A4 thereof is parallel to the rotation axis A2 of the driven plate 12. In the state, it is connected to the intermediate plate 13 by four drive side links 16.
On the opposite side of the drive plate 14 from the intermediate plate 13 side, a ring-shaped transmission gear 9 having an inner diameter larger than that of the movable shaft 11 is positioned on the outer periphery of the movable shaft 11 (the movable shaft 11 is the transmission gear). 9), the rotation axis A4 is fixed concentrically with the rotation axis A4 of the drive plate. That is, the drive plate 14 is concentrically connected to the transmission gear 9 around the rotation axis A4 so as to be integrally rotatable.

  The movable shaft 11 protrudes from both the driven plate 12 and the transmission gear 9, and the roller 4 is concentrically attached to the intermediate portion of the protruding portion from the transmission gear 9 on the movable shaft 11 so as to be integrally fitted. ing. That is, the driven plate 12 is concentrically connected to the roller 4 around the rotation axis A2 so as to be integrally rotatable.

The four driven links 15 are distributed in the circumferential direction of the movable shaft 11 in a state of being parallel to each other, and the four drive side links 16 are also distributed in the circumferential direction of the movable shaft 11 in a state of being parallel to each other. Has been.
Also in the second embodiment, as in the first embodiment, one end of each driven side link 15 and one end of each drive side link 16 are pivotally supported on the intermediate plate 13 by a concentric pivot axis a1. ing. Here, as in the first embodiment, the pivot axis in which the other end of each driven side link 15 is pivotally supported by the driven plate 12 is indicated by reference numeral a2, and the other end of each driving side link 16 is driven. A pivot axis that is pivotally supported by the plate 14 is indicated by a3. The distance between the pivot axes a1 and a2 on both sides of the four driven links 15 and the distance between the pivot axes a1 and a3 on both sides of the four drive links 16 are all the same. is there.

Even if the rotation axis A4 of the drive plate 14 and the rotation axis A2 of the driven plate 12 are decentered within a required range, the driven plate 12, the intermediate plate 13, the drive plate 14, and the four driven links. The 15 and 4 drive side links 16 are configured not to interfere with the movable shaft 11, and the eccentric coupling 10 has a predetermined range between the rotation axis A4 of the drive plate 14 and the rotation axis A2 of the driven plate 12. It is configured to be eccentric.
When the drive plate 14 rotates, the rotation of the drive plate 14 is synchronously transmitted to the intermediate plate 13 by the four drive side links 16, and the rotation of the intermediate plate 13 is driven by the four driven side links 15. Since it is transmitted synchronously to the plate 12, when the drive plate 14 rotates, the intermediate plate 13, the driven plate 12 and the movable shaft 11 rotate synchronously with the drive plate 14.

  Although illustration is omitted, when the rotation axis A2 of the driven plate 12 and the rotation axis A4 of the drive plate 14 are concentric, as in the first embodiment, the direction of the rotation axis (Z In the direction), a straight line (not shown) connecting the pivot axes a1 and a2 on both sides of the driven link 15 and a straight line (not shown) connecting the pivot axes a1 and a3 on both sides of the drive side link 16 are shown. It is comprised so that it may overlap in a parallel state.

Then, as shown in FIG. 9A, both ends of the movable shaft 11 of the eccentric coupling 10 in which the transmission gear 9 and the roller 4 are assembled as described above are connected to each other by a pair of movable shaft bearings 21 in a front view. A unit-shaped processing unit U is configured to be rotatably supported by a U-shaped movable shaft rotation support body 22.
The machining unit U is supported by a pair of guide rails 24 on a support base 23 by a movable shaft rotating support 22 so as to be reciprocally movable in the X direction with the movable shaft 11 parallel to the main shaft 1. A threaded shaft 25 having a rotational axis centered along the vertical axis α is screwed into the movable shaft rotation support 22 of the processing unit U supported by the pair of guide rails 24.
An X-direction drive device 26 such as a pulse motor that reciprocally moves the machining unit U in the X direction by rotating the screw shaft 25 forward and backward is provided. That is, when the processing unit U reciprocates in the X direction, the reciprocating movement is performed in a state in which the rotation axis A2 of the movable shaft 11 passes on the perpendicular line α between the axes.

  That is, the X-direction drive device 26 is configured to function as a pressing mechanism D that moves the roller 4 in a direction orthogonal to the main shaft 1 (X direction) and presses the roller 4 against the disc-shaped material W. Then, the pressing mechanism D moves the roller 4 and the driven plate 12 concentrically connected to the rotation axis A2 so as to be integrally rotatable in a state where the rotation axis A2 of the roller 4 passes over the axis-centered perpendicular α. It will be provided to do.

  Next, the transmission gear position holding mechanism K will be described. As shown in FIG. 9A, in the second embodiment, the transmission gear position holding mechanism K is configured such that the transmission gear 9 is at the rotational axis A4. A rotation support frame 28 that rotatably supports a drive plate 14 that is concentrically connected so as to be integrally rotatable via a drive plate bearing 27, and a position of the drive plate 14 supported by the rotation support frame 28 (that is, transmission). A Y-direction position adjustment unit 40 that adjusts the position of the gear 9 (the position of the rotation axis A4) in a direction perpendicular to the axis-centered perpendicular α and the rotation axis A1 of the main shaft 1 (that is, the Y direction); A transmission gear holding hydraulic cylinder 29 is provided for moving the drive plate 14 (ie, the transmission gear 9) whose position in the Y direction has been adjusted by the Y-direction position adjusting unit 40 along a direction parallel to the perpendicular line α between the axes. Configured Yes. That is, the drive plate 14 is rotatably supported by the rotation support frame 28 via the drive plate bearing 27.

The Y-direction position adjustment unit 40 is configured in the same manner as in the first embodiment.
A rotation support frame 28 that rotatably supports the drive plate 14 (that is, the transmission gear 9) is fixedly connected to the movable base 42 of the Y-direction position adjustment unit 40. The transmission gear holding hydraulic cylinder 29 is fixedly installed on a gantry (not shown) in a posture in which the cylinder rod can be expanded and contracted along a direction parallel to the vertical axis α, and the transmission gear holding hydraulic cylinder 29 A base 41 of the Y-direction position adjusting unit 40 is fixedly connected to the tip of the 28 cylinder rods.

  Then, the movable table 42 is positioned at a predetermined position biased in the Y direction from the axis-centered perpendicular α by the four adjuster bolts 43, the six fixing bolts 45 are tightened, and the transmission gear holding hydraulic cylinder 29 is further tightened. Thus, by holding the position of the transmission gear 9 in a state where it is pressed against the synchronous gear 8 and meshed, the transmission gear 9 can be connected to the rotation axis A4 of the transmission gear 9 in the Y direction from the centerline perpendicular α to the Y direction. It can be held in a state of being meshed with the synchronous gear 8 at a position where the set amount is biased.

  As shown in FIG. 10, with detailed illustration omitted, in the second embodiment as well as in the first embodiment, when the transmission gear 9 is viewed in the direction of the rotation axis A <b> 4, The position of the rotational axis A4 is a circle whose center angle β formed by the axis-centered perpendicular α is 5 °, for example, in a circle centered on the rotational axis A1 of the main shaft 1 (that is, the synchronous gear 8). Positioned on the extension line, the transmission gear 9 is set to a position where it meshes with the synchronous gear 8.

Next, the control operation of the control unit 7 when the gear is manufactured by the rotary plastic working apparatus will be described. Since the control operation is the same as that in the first embodiment, it will be described briefly.
Similar to the first embodiment, the start position Ps and the end position Pe are set and stored in the memory of the control unit 7.
FIG. 10 shows a state where the roller 4 is located at the end position Pe.
Then, as shown in FIG. 10, the state where the roller 4 is located at the end position Pe, the driven side link 15 and the drive side link 16 are V-shaped while the roller 4 moves from the start position Ps to the end position Pe. Is maintained.

Before starting the production of the gear, the transmission gear 9 is displaced by the transmission gear holding hydraulic cylinder 29 so that the rotational axis A4 of the transmission gear 9 is biased in the Y direction by a set amount in the Y direction from the axial center line α. And held in a state engaged with the synchronous gear 8.
When the start command is instructed, the control unit 7 operates the X-direction drive device 26 to position the roller 4 at the start position Ps, and operates the work supply device (not shown) to form a disk shape to be processed. A workpiece holding step (material holding step) in which the material W is positioned at a position facing the material support portion 3 and the workpiece holding hydraulic cylinder 6 is operated to hold the disk-shaped material W between the material support portion 3 and the pressing member 5. Equivalent to).

Subsequently, the control unit 7 rotates while the position of the transmission gear 9 is held in a state where the transmission gear 9 is engaged with the synchronous gear 8 and the disk-shaped material W is sandwiched between the material support unit 3 and the pressing member 5. The drive device 2 is operated at a predetermined rotational speed.
Subsequently, the control unit 7 operates the X-direction drive device 26 to move the roller 4 rotating in synchronization with the material support unit 3 in the −X direction at a predetermined speed along the axis center perpendicular line α. Then, a processing step of pressing the disk-shaped material W supported by the material support portion 3 and rotating integrally with the material support portion 3 is executed.
Then, as shown in FIG. 10, when the roller 4 reaches the end position Ps, the control unit 7 operates the X-direction drive device 26 to return the roller 4 to the start position Ps, and then stops the rotation drive device 2. Then, the workpiece holding hydraulic cylinder 6 is operated so as to retract the cylinder rod, and the workpiece discharging device (not shown) is operated to remove the manufactured gear from the material support portion 3.

  That is, the control unit 7 operates the workpiece holding mechanism H to execute a material holding step of clamping the disc-shaped material W between the material support unit 3 and the pressing member 5, and subsequently operates the pressing mechanism D, In the state where the transmission gear 9 is engaged with the synchronous gear 8 by the transmission gear position holding mechanism K, the processing step of plastic processing the disk-shaped material W by the roller 4 is executed.

Therefore, as in the first embodiment, the roller 4 that has already been rotated synchronously with the material support portion 3 is pressed against the disk-shaped material W from the position away from the disk-shaped material W and approaching the disk-shaped material W. And, while performing the plastic working of the disk-shaped material W, the working accuracy of the gears is improved by the synergistic action that each driven side link 15 and each driving side link 16 can be maintained in a V-shaped state. It can be effectively improved.
Moreover, in the second embodiment, while using the eccentric coupling 10 that can eccentrically rotate the rotational axis A4 of the transmission gear 9 and the rotational axis A2 of the roller 4, the roller 4 is concentric with the eccentric coupling 10. And a movable shaft 11 that is supported so as to be integrally rotatable, and is configured to rotate the movable shaft 11 synchronously with the material support portion 3 in a state where both ends are supported by a support frame 22 via a movable shaft bearing 21. By doing so, the blurring of the rotation axis A2 of the roller 4 can be suppressed, and this also improves the processing accuracy of the gear.
Therefore, the processing accuracy of the gear can be further improved.

[Another embodiment]
(A) The number of the plurality of driven side links 15 and the number of the plurality of driving side links 16 are not limited to the three or four illustrated in the above embodiments, respectively.
In each of the above embodiments, one end of each driven side link 15 and one end of each drive side link 16 are pivotally supported on the intermediate plate 13 by a concentric pivot axis a1, but separate pivot axes are provided. May be pivotally supported by the intermediate plate 13.

(B) The length of the roller 4 in the axial direction of the external tooth forming die 4m may be set to be shorter than the length of the external tooth Wo formed in the disk-shaped material W in the axial direction. In this case, in addition to the X-direction drive device 26, a Z-direction drive device that reciprocates the machining unit U in the Z direction along the rotation axis A1 of the main shaft 1 is provided, and the roller 4 is moved in the Z direction by the Z-direction drive device. The outer teeth Wo having a desired length longer than the external tooth forming mold 4m of the roller 4 can be formed on the disc-shaped material W.

(C) On the outer peripheral surface of the drive plate 14, teeth that mesh with the synchronous gear 8 may be formed so that the drive plate 14 is also used as the transmission gear 9.

(D) The start position Ps and the end position Pe of the roller 4 when the disk 4 is formed by moving the roller 4 in the −X direction can be appropriately changed. For example, in each of the embodiments described above, the end position Pe is set so that the rotation axis A2 of the roller 4 is at the same position as the rotation axis A4 of the transmission gear 9 on the axis center perpendicular line α. The rotation axis A2 of the transmission gear 9 may be set different from the rotation axis A4 of the transmission gear 9 on the axis-interval perpendicular α.

(E) The form in which the work material is plastically processed is not limited to the form in which the outer teeth Wo are formed on the outer peripheral surface as in each of the above embodiments. For example, the work material is formed around the axis of the work material. It is also possible to form an unevenness at a constant pitch along.
Further, a specific example of the material to be processed is not limited to the disk-shaped material W as exemplified in the above embodiments.

  As described above, it is possible to provide a rotary plastic working apparatus that can improve plastic working accuracy.

1 Spindle 2 Rotation drive device (Rotation drive means)
3 Material support 4 Roller 4m External tooth forming die 5 Pressing member (holding member)
7 Control unit (control means)
8 Synchronous gear 9 Transmission gear 10 Eccentric coupling 11 Movable shaft 12 Driven plate 13 Intermediate plate 14 Drive plate 15 Driven side link 16 Driven side link 21 Bearing for movable shaft (bearing)
A1 Axis of rotation of main shaft A2 Axis of rotation of roller, rotation axis of driven plate, rotation axis of movable shaft A3 rotation axis of intermediate plate A4 rotation axis of drive plate, rotation axis of transmission gear D Pressing mechanism H Work holding mechanism (material holding mechanism)
K transmission gear position holding mechanism S synchronous rotation mechanism W disk-shaped material (work material)
Wo external tooth α axis center perpendicular

Claims (4)

In a state of supporting a workpiece having a circular outer peripheral surface as viewed in the axial direction, a material support portion rotated by a rotation driving means around the main shaft and a roller for plastic processing of the workpiece are orthogonal to the main shaft. And a pressing mechanism for moving the roller against the workpiece material, and a synchronous rotation mechanism for transmitting the rotation of the main shaft to the roller so as to rotate the roller synchronously with the material support portion. A rotary plastic working device,
The synchronous rotation mechanism is
A synchronous gear that rotates integrally with the material support around the main shaft;
A transmission gear arranged in mesh with the synchronous gear;
A driven plate, an intermediate plate connected to the driven plate by a plurality of driven links so that the rotational axis and the rotational axis of the driven plate are eccentric and transmit rotation to the driven plate, and rotation of the intermediate plate An eccentric coupling comprising a drive plate connected to the intermediate plate by a plurality of drive side links so that the shaft center and the rotational axis are eccentric and capable of transmitting rotation to the intermediate plate;
A transmission gear position holding mechanism that holds the position of the transmission gear in a state of meshing with the synchronous gear;
In the eccentric coupling, the drive plate is concentrically connected to the transmission gear so as to be integrally rotatable, and the driven plate is concentrically connected to the roller so as to be integrally rotatable. Provided in a posture in which the rotational axis of the driven plate is parallel to the main axis;
The pressing mechanism includes a concentric roller and the driven plate that are connected so as to be integrally rotatable, and a rotation center of the roller connects a rotation axis of the roller and a rotation axis of the main shaft. It is provided to move while passing on the line,
The transmission gear position holding mechanism moves the transmission gear to the synchronous gear at a position where the rotational axis of the transmission gear is biased by a set amount in a direction perpendicular to the axis-centered perpendicular from the axis-centered perpendicular. A rotary plastic working apparatus configured to be held in an engaged state. The eccentric coupling is configured to include a movable shaft that is inserted through the ring-shaped intermediate plate, the drive plate, and the transmission gear, and is concentrically connected to the driven plate so as to be integrally rotatable.
A portion of the movable shaft that passes through the transmission gear is concentrically connected to the roller so as to be integrally rotatable, and the movable shaft is rotatably supported by bearings at both ends in a posture parallel to the main shaft. Provided,
The rotary plastic working apparatus according to claim 1, wherein the pressing mechanism is provided so as to move the movable shaft in a state in which a rotation axis passes through a perpendicular between the axis centers. An outer tooth mold is provided on the outer peripheral surface of the roller,
The rotary plastic working apparatus according to claim 1 or 2, wherein external gears are formed on an outer peripheral surface of the workpiece material to produce a gear having external teeth. A material holding mechanism that moves a holding member that can rotate concentrically with the main shaft toward the material support portion, and holds the work material supported by the material support portion with the material support portion;
The material holding mechanism is operated to execute a material holding process for holding the workpiece material between the material support portion and the holding member, the pressing mechanism is operated, and the transmission gear is held by the transmission gear position holding mechanism. The rotary plastic working apparatus according to any one of claims 1 to 3, further comprising a control unit that executes a machining step of plastic working the material to be processed by the roller in a state of being engaged with the synchronous gear.

Images