JP2018111103A - Rotation plastic forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time needed for changeover of a rotation plastic forming device and thereby improve the operation rate of the device.SOLUTION: A rotation plastic forming device has a spring clamp mechanism Q, a first piston R, and a second piston S. The spring clamp mechanism Q fixes a workpiece holding unit A to a rotation mechanism N with elastic force of a spring and releases fixture between the workpiece holding unit A and the rotation mechanism N when an oil pressure is supplied from the first piston R. The first piston R supplies an oil pressure to the spring clamp mechanism Q when pressed by the second piston S. The second piston S is spaced away from the rotation mechanism N.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a rotary plastic working apparatus that performs plastic working by rotating a workpiece.

  In such a rotary plastic working apparatus, the workpiece is rotated by the spindle mechanism while being held by the apparatus. Then, a processing roller is pressed against the workpiece, plastic processing is performed, and a product is manufactured. For example, in the apparatus of Patent Document 1, a central portion of a disk-shaped metal material is clamped to a jig, the metal material is rotated in a state where the outer peripheral portion of the metal material protrudes from the jig, and the outer peripheral portion Thickening process is performed by pressing a mold (roller) onto

Japanese Patent Laid-Open No. 09-066631

  By the way, in the processing apparatus as described above, a member (mold or the like) or a processing roller that holds a workpiece is adapted to the product to be manufactured. Therefore, when changing the product to be manufactured, it is necessary to replace the member that holds the workpiece and the processing roller with one that is compatible with the product to be manufactured thereafter. This so-called setup change operation conventionally takes about one hour. This is because the work holding member and the processing roller are firmly fixed with a large number of bolts, and the work space inside the apparatus is small, so the workability is poor.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to shorten the time required for the changeover of the rotary plastic working apparatus and increase the operating rate of the apparatus.

The characteristic configuration of the rotary plastic working device for achieving the above object is as follows:
A rotary plastic working device that performs plastic working of a work by rotating a work holding unit holding a work by a rotating mechanism and bringing a roller into contact with the work,
A spring clamp mechanism, a first piston, and a second piston;
The spring clamp mechanism fixes the work holding unit to the rotation mechanism by the elastic force of a spring, and releases the fixation between the work holding unit and the rotation mechanism when hydraulic pressure is supplied from the first piston.
The first piston supplies hydraulic pressure to the spring clamp mechanism when pushed by the second piston,
The second piston is located away from the rotation mechanism.

  The work holding unit of the rotary plastic working apparatus is usually fixed to the main shaft mechanism using a large number of bolts, and these bolts are arranged along the outer periphery of the work holding unit. Then, in order to attach / detach the workpiece holding unit to / from the spindle mechanism, it is necessary to attach / detach the bolts on the side surface and the rear surface as well as the front side of the workpiece holding unit, which requires a great deal of time. In addition, the internal space of the rotary plastic working apparatus in which the work holding unit and the spindle mechanism are to be arranged is designed to have a minimum necessary size in order to reduce the size of the apparatus. If it does so, the workability | operativity of attachment or detachment of a workpiece | work holding unit will become worse. According to the above characteristic configuration, since the spring clamp mechanism attaches / detaches (fixes / unfixes) the work holding unit to / from the rotation mechanism, it is not necessary to attach / detach many bolts manually, and the workability is greatly improved. That is, it is possible to shorten the time required for the setup change of the rotary plastic working apparatus and increase the operating rate of the apparatus. The spring clamp mechanism is actuated by the hydraulic pressure from the first piston, and the second piston that pushes the first piston is arranged away from the rotation mechanism. Therefore, the hydraulic circuit for operating the spring clamp mechanism is arranged on the fixed side of the rotation mechanism. Therefore, it is not necessary to provide over the rotating side, and the risk of oil leakage can be reduced. That is, it is possible to realize a mechanism for changing the setup of the rotary plastic working apparatus with a simple configuration.

Another characteristic configuration of the rotary plastic working apparatus according to the present invention is:
A roller holding and moving mechanism for moving the roller and contacting the workpiece;
The force with which the second piston pushes the first piston is caused by the force that moves the roller holding and moving mechanism toward the rotating mechanism.

  According to the above characteristic configuration, since the roller holding and moving mechanism generates a force by which the second piston pushes the first piston, a mechanism for changing the setting of the rotary plastic processing apparatus can be realized with a simple configuration. It becomes.

Another characteristic configuration of the rotary plastic working apparatus according to the present invention is:
A main shaft side spring clamp mechanism, a tailstock side spring clamp mechanism, a main shaft side first piston, a tailstock side first piston, a main shaft side second piston, a tailstock side second piston, and a force branch mechanism;
The rotating mechanism has a main shaft mechanism and a tailstock mechanism,
The work holding unit has a main shaft side member and a tailstock side member,
The main shaft side spring clamp mechanism fixes the main shaft side member to the main shaft mechanism by the elastic force of a spring, and fixes the main shaft side member and the main shaft mechanism when hydraulic pressure is supplied from the first main shaft side piston. Is released,
The tailstock-side spring clamp mechanism fixes the tailstock-side member to the tailstock mechanism by an elastic force of a spring, and when the hydraulic pressure is supplied from the tailstock-side first piston, the tailstock-side member, the tailstock mechanism, Unpin the
The main shaft side first piston supplies hydraulic pressure to the main shaft side spring clamp mechanism when pushed by the main shaft side second piston,
The tailstock side first piston supplies hydraulic pressure to the tailstock side spring clamp mechanism when pushed by the tailstock side second piston;
The force branching mechanism is that a force for moving the roller holding and moving mechanism toward the rotating mechanism is branched and transmitted to the main shaft side second piston and the tailstock side second piston.

  According to the above characteristic configuration, the force branching mechanism branches the force from the roller holding and moving mechanism and transmits it to the main shaft side second piston and the tailstock side second piston, so that both the main shaft side and the tailstock side are fixed. The release can be realized with a simple configuration.

  Another characteristic configuration of the rotary plastic working apparatus according to the present invention is that the second piston is placed on a carriage movable with respect to the rotation mechanism.

  According to said characteristic structure, since the 2nd piston is mounted in the trolley | bogie movable with respect to a rotation mechanism, if a setup change is completed, a trolley | bogie can be evacuated from the vicinity of a rotation mechanism. It is possible to realize a mechanism for changing the setup of the plastic working apparatus with a simple configuration.

Front view showing the outline of the rotary plastic processing equipment Top view showing the outline of the rotary plastic processing system Schematic cross-sectional view showing replacement work position and standby position Front view showing the replacement work position The figure which shows the outline | summary of the action | operation mechanism of a spring clamp mechanism Explanatory drawing of fixing operation of tailstock side member by spring clamp mechanism Partial sectional view showing structure of rotation mechanism and work holding unit Explanatory drawing of work holding unit fixing operation to spindle mechanism and tailstock mechanism Explanatory drawing of work holding unit fixing operation to spindle mechanism and tailstock mechanism Explanatory drawing of work holding unit fixing operation to spindle mechanism and tailstock mechanism Explanatory drawing of work holding unit fixing operation to spindle mechanism and tailstock mechanism Explanatory drawing of work holding unit fixing operation to spindle mechanism and tailstock mechanism

<Outline of rotary plastic processing system>
Hereinafter, the rotational plastic working system 1 according to the present embodiment will be described with reference to the drawings. In the following, the directions indicated by arrow UP, arrow DW, arrow FR, arrow BK, arrow LH and arrow RH in the figure are defined as upward, downward, forward, backward, leftward and rightward, respectively. To explain.

  As shown in FIG. 2, the rotary plastic processing system 1 includes a rotary plastic processing device 2, a unit transport cart 3, and a control unit 4. The rotary plastic working apparatus 2 shown in FIG. 1 is supported by the work roller support unit 60 by rotating it with the rotation mechanism N (the spindle mechanism 10 and the tailstock mechanism 20) while holding the work W on the work holding unit A. This is an apparatus for pressing the work roller 63 to perform plastic working on the workpiece W. As shown in FIG. 2, the unit transport carriage 3 is disposed on the front side of the rotary plastic working apparatus 2, supports the work holding unit A and the processing roller support unit 60, and these are arranged inside and outside the rotary plastic working apparatus 2. Move between. A plurality of unit transport carts 3 are arranged on the front side of the rotary plastic processing apparatus 2, and the work holding unit A and the processing roller support unit 60 are detached from the rotary plastic processing apparatus 2 and attached to the rotary plastic processing apparatus 2. Work is done.

  The control unit 4 includes an exchange control unit 4a. The replacement control unit 4a controls the work of removing the workpiece holding unit A and the processing roller support unit 60 from the rotary plastic working apparatus 2 and attaching them to the rotary plastic working apparatus 2.

<Outline of rotary plastic processing equipment>
As shown in FIG. 1, the rotary plastic working apparatus 2 includes a main shaft mechanism 10, a tailstock mechanism 20, a main shaft side member 30, a tailstock side member 40, a roller holding and moving mechanism 50, and a processing roller support unit 60. . The workpiece W is sandwiched between the main shaft side member 30 and the tailstock side member 40. That is, the work holding unit A is configured to include the main shaft side member 30 and the tailstock side member 40.

  The workpiece W processed by the rotary plastic processing apparatus 2 is a disk or a columnar material. As a material of the workpiece W, any material that can be processed by the rotary plastic processing apparatus 2 is preferably used. For example, a material made of stainless steel, iron alloy, or aluminum alloy is used.

The main shaft side member 30 is attached to the main shaft mechanism 10 via a main shaft attaching / detaching mechanism B described later (the main shaft side spring clamp mechanism 12 and the insertion hole 32 of the main shaft side member 30).
The tailstock side member 40 is attached to the tailstock mechanism 20 via a tailstock attachment / detachment mechanism C (the tailstock side spring clamp mechanism 22 and the insertion hole 42 of the tailstock side member 40) which will be described later. Then, the spindle mechanism 10 is rotated by a motor (not shown), the work holding unit A is rotated together with the tailstock mechanism 20, and the work W is rotated.

  The processing roller support unit 60 is attached to the roller holding and moving mechanism 50 via a roller attaching / detaching mechanism F described later. Then, the roller holding / moving mechanism 50 is moved by an actuator (not shown), and the processing roller 63 supported by the processing roller support unit 60 is pressed against the workpiece W. As described above, the plastic working is performed on the workpiece W. The attachment / detachment of the work holding unit A to the rotary plastic working apparatus 2 will be described in detail later.

<Unit transport cart>
As shown in FIGS. 3 and 4, the unit transport cart 3 includes an upper cart 80 and a lower cart 90. A work holding unit A (the main shaft side member 30 and the tailstock side member 40) and a processing roller support unit 60 are mounted on the upper carriage 80. The upper carriage 80 has wheels 88 on the lower side.

  As shown in FIG. 4, the lower cart 90 has wheels 92 on the lower side, and is movable in the left and right and front and rear directions on the front side of the rotary plastic working apparatus 2. The lower cart 90 has a rail 91 on the upper side. Then, the upper carriage 80 is placed on the upper side of the rail 91 in a state where the wheels 88 of the upper carriage 80 are engaged. Accordingly, the upper carriage 80 can move in the front-rear direction on the upper side of the rail 91. Then, as shown in FIG. 3, the upper carriage 80 can move backward from above the lower carriage 90 and can enter the rotary plastic working apparatus 2.

  Thereby, as shown in FIG. 3, the upper carriage 80 of the unit transport carriage 3 moves the workpiece holding unit A between the exchange work position P1 inside the rotary plastic working apparatus 2 and the standby position P3 outside the rotary plastic working apparatus 2. Can be moved between. The replacement work position P1 of the work holding unit A is between the spindle mechanism 10 and the tailstock mechanism 20. When the workpiece holding unit A is arranged at the replacement work position P1 by the upper carriage 80 of the unit transport carriage 3, the center axis of the workpiece holding unit A and the rotation axis G of the spindle mechanism 10 coincide.

  Further, as shown in FIG. 3, the upper carriage 80 of the unit transport carriage 3 is configured so that the processing roller support unit 60 is replaced with an exchange work position P2 inside the rotary plastic working apparatus 2 and a standby position P4 outside the rotary plastic working apparatus 2. Can be moved between. As shown in FIG. 2, the replacement operation position P <b> 2 of the processing roller support unit 60 is positioned on both sides of the rotation axis G of the spindle mechanism 10 and is positioned in the vicinity of the roller holding and moving mechanism 50.

<Mechanism for attaching / detaching workpiece holding unit A>
Next, with reference to FIGS. 5 and 6, a mechanism for attaching and detaching the work holding unit A (spindle side member 30 and tailstock side member 40) to / from the rotation mechanism N (spindle mechanism 10 and tailstock mechanism 20) will be described.

  As shown in FIG. 5, in the rotary plastic working device 2 of the present embodiment, a plurality of spring clamp mechanisms Q (spindle side spring clamp mechanisms 12) are arranged on the clamp member 11 of the spindle mechanism 10. A plurality of spring clamp mechanisms Q (tailstock side spring clamp mechanisms 22) are arranged on the clamp member 21 of the tailstock mechanism 20. In the present embodiment, the clamp member 11 is a columnar member, and the plurality of spindle-side spring clamp mechanisms 12 are arranged at equal intervals along the outer periphery of the clamp member 11. Similarly, the clamp member 21 is a cylindrical member, and the plurality of tailstock-side spring clamp mechanisms 22 are arranged at equal intervals along the outer periphery of the clamp member 21.

  The spring clamp mechanism Q is a mechanism that is operated by supplied hydraulic pressure and a built-in spring. Specifically, as shown in FIG. 6, the spring clamp mechanism Q includes a main body (22a), a shaft (22b), and a head (22c). The shaft (22) is urged upward by a spring (not shown) built in the main body (22a). When hydraulic pressure is supplied from the hydraulic circuit (24), the shaft (22b) and the head (22c) move downward against the elastic force of the spring. When the supply of hydraulic pressure from the hydraulic circuit (24) stops, the shaft (22b) and the head (22c) move upward by the elastic force of the spring.

  As shown in FIG. 5, a plurality of insertion holes 32 are formed in the main shaft side member 30, and a plurality of insertion holes 42 are formed in the tailstock side member 40. In the present embodiment, the main shaft side member 30 is a columnar member, and the plurality of insertion holes 32 are arranged at equal intervals along the outer periphery of the main shaft side member 30. Similarly, the tailstock side member 40 is a cylindrical member, and the plurality of insertion holes 42 are arranged at equal intervals along the outer periphery of the tailstock side member 40.

  The head 12c of the main shaft side spring clamp mechanism 12 is inserted into the insertion hole 32 of the main shaft side member 30, and the clamp member 11 of the main shaft mechanism 10 and the main shaft side member 30 are fixed. The head 22c of the tailstock side spring clamp mechanism 22 is inserted into the insertion hole 42 of the tailstock side member 40, and the clamp member 21 of the tailstock mechanism 20 and the tailstock side member 40 are fixed. That is, the spring clamp mechanism Q fixes the work holding unit A to the rotation mechanism N.

  With reference to FIG. 6, the fixing of the workpiece holding unit A to the rotation mechanism N by the spring clamp mechanism Q will be described in detail. FIG. 6 shows, as an example, a tailstock-side spring clamp mechanism 22 and an insertion hole 42 of the tailstock-side member 40.

  The insertion hole 42 includes a vertical hole 42a, a horizontal hole 42b, and a U-shaped groove 42c. The vertical hole 42 a is a hole formed vertically downward from the upper surface of the flange portion 41. The diameter of the vertical hole 42 a is slightly larger than the diameter of the head portion 22 c of the tailstock side spring clamp mechanism 22. The horizontal hole 42b is a hole extending along the circumferential direction of the flange portion 41 from the bottom of the vertical hole 42a. The lateral hole 42b is formed to be slightly larger than the head portion 22c of the tailstock side spring clamp mechanism 22, and the head portion 22c can move inside. The U-shaped groove 42c is a U-shaped groove formed along the circumferential direction of the flange portion 41 from the side surface of the vertical hole 42a, and communicates with the horizontal hole 42b. The width of the U-shaped groove 42c is slightly larger than the diameter of the shaft portion 22b and smaller than the diameter of the head portion 22c.

  The tailstock side member 40 is fixed to the tailstock mechanism 20 by the tailstock side spring clamp mechanism 22 as follows. The tailstock mechanism 20 and the tailstock side member 40 approach each other, and the head portion 22 c of the tailstock side spring clamp mechanism 22 is inserted into the vertical hole 42 a of the insertion hole 42 of the tailstock side member 40. When the tailstock mechanism 20 and the tailstock side member 40 come into contact with each other, hydraulic pressure is supplied from the tailstock side hydraulic circuit 24. Then, the tailstock side spring clamp mechanism 22 is actuated, and the shaft portion 22b and the head portion 22c are moved downward. Then, the head portion 22c reaches the bottom of the vertical hole 42a and is positioned beside the horizontal hole 42b.

  In this state, the tailstock mechanism 20 and the tailstock side member 40 relatively rotate in opposite directions. Then, the head portion 22c of the tailstock-side spring clamp mechanism 22 enters the lateral hole 42b of the insertion hole 42, and the shaft portion 22b enters the U-shaped groove 42c (see the arrow in FIG. 6). In this state, the supply of hydraulic pressure from the tailstock hydraulic circuit 24 is stopped. Then, the shaft portion 22b and the head portion 22c are moved upward by the spring built in the tailstock-side spring clamp mechanism 22, and the upper surface of the head portion 22c comes into contact with the upper surface 42d of the lateral hole 42b. Even after the supply of hydraulic pressure from the tailstock side hydraulic circuit 24 is stopped, the head 22c is biased upward by the spring built in the tailstock spring clamp mechanism 22, so that the head 22c is moved to the tailstock side member. 40 is pulled upward, that is, toward the tailstock mechanism 20.

  As described above, the tailstock mechanism 20 and the tailstock side member 40 are fixed by the tailstock side spring clamp mechanism 22. The spindle mechanism 10 and the spindle-side member 30 are similarly fixed by the spindle-side spring clamp mechanism 12.

  That is, in the present embodiment, the main shaft side spring clamp mechanism 12 and the insertion hole 32 constitute the main shaft attaching / detaching mechanism B. The main shaft attaching / detaching mechanism B is provided between the main shaft mechanism 10 and the main shaft side member 30, and attaches / detaches the main shaft mechanism 10 and the main shaft side member 30. The tailstock side spring clamp mechanism 22 and the insertion hole 42 constitute a tailstock attachment / detachment mechanism C. The tailstock attachment / detachment mechanism C is provided between the tailstock mechanism 20 and the tailstock side member 40 and attaches / detaches the tailstock mechanism 20 and the tailstock side member 40.

  A mechanism for operating the spring clamp mechanism Q will be described with reference to FIG. The rotation mechanism N is provided with a first piston R, and the spring clamp mechanism Q is operated by the hydraulic pressure supplied from the first piston R.

  Specifically, the main shaft side first piston 13 and the main shaft side hydraulic circuit 14 are arranged on the clamp member 11 of the main shaft mechanism 10. The main shaft side hydraulic circuit 14 connects the main shaft side first piston 13 and the main shaft side spring clamp mechanism 12. When the main shaft side first piston 13 is pressed from the outside, the force is transmitted as hydraulic pressure to the main shaft side spring clamp mechanism 12 via the main shaft side hydraulic circuit 14, and the main shaft side spring clamp mechanism 12 is activated.

  The tailstock side has the same configuration. That is, the tailstock side first piston 23 and the tailstock side hydraulic circuit 24 are arranged on the clamp member 21 of the tailstock mechanism 20. The tailstock side hydraulic circuit 24 connects the tailstock side first piston 23 and the tailstock side spring clamp mechanism 22. When the tailstock-side first piston 23 is pressed from the outside, the force is transmitted as hydraulic pressure to the tailstock-side spring clamp mechanism 22 via the tailstock-side hydraulic circuit 24, and the tailstock-side spring clamp mechanism 22 is activated.

  The second piston S is disposed at a position facing the first piston R. The second piston S operates when the hydraulic pressure is supplied and pushes the first piston R.

  Specifically, the main shaft side second piston 101 is disposed at a position facing the main shaft side first piston 13. The tailstock-side second piston 102 is disposed at a position facing the tailstock-side first piston 23. The main shaft side second piston 101 and the tailstock side second piston 102 are arranged in the unit transport carriage 3 (cart) described above. That is, the second piston S (the main shaft side second piston 101 and the tailstock side second piston 102) is disposed away from the rotation mechanism N (the main shaft mechanism 10 and the tailstock mechanism 20).

  Further, a third piston 103 and a cart side hydraulic circuit 104 are arranged on the unit transport cart 3. The cart side hydraulic circuit 104 connects the main shaft side second piston 101, the tailstock side second piston 102, and the third piston 103. When the third piston 103 is pressed from the outside, the force is transmitted as hydraulic pressure to the main spindle side second piston 101 and the tailstock side second piston 102 via the carriage side hydraulic circuit 104, and the main spindle side second piston 101 and the center axis are transmitted. The push side second piston 102 operates. That is, the main shaft side second piston 101 and the tailstock side second piston 102 push the main shaft side first piston 13 and the tailstock side first piston 23.

  In the present embodiment, the third piston 103 is pushed by the roller holding and moving mechanism 50 described above. That is, when the roller holding and moving mechanism 50 pushes the third piston 103, the force is branched by the carriage side hydraulic circuit 104 and transmitted to the main spindle side second piston 101 and the tailstock side second piston 102, and the main spindle side second piston. 101 and the tailstock side second piston 102 push the main shaft side first piston 13 and the tailstock side first piston 23. That is, in the present embodiment, the cart side hydraulic circuit 104 branches the force for moving the roller holding and moving mechanism 50 toward the rotation mechanism N and transmits it to the main shaft side second piston 101 and the tailstock side second piston 102. , Function as a force branch mechanism T.

  Next, with reference to FIG. 7, the detailed structure of the clamp member 11 of the spindle mechanism 10, the spindle side member 30, the clamp member 21 of the tailstock mechanism 20, and the tailstock side member 40, and the work holding unit A (spindle side member 30). The structure relating to the mounting of the tailstock member 40) on the unit transport carriage 3, and the structure and arrangement of the second piston S and the like mounted on the unit transport carriage 3 will be described.

<Spindle side structure>
The clamp member 11 of the main shaft mechanism 10 is a disk-shaped member, and is attached to the main shaft mechanism 10 in a posture in which the central axis coincides with the rotation axis G of the main shaft mechanism 10. The clamp member 11 is provided with the spindle-side spring clamp mechanism 12, the spindle-side first piston 13, and the spindle-side hydraulic circuit 14 described above.

  The main shaft-side spring clamp mechanism 12 is configured so that the shaft portion 12b and the head portion 12c protrude from the upper surface of the clamp member 11 in a posture in which the operation shaft (the central axis of the shaft portion 12b) coincides with the vertical direction. 11 is disposed on the upper surface. In the present embodiment, six spindle-side spring clamp mechanisms 12 are arranged on the outer periphery of the clamp member 11 at equal intervals on the circumference centered on the rotation axis G (in FIG. 7, one spindle side Only the spring clamp mechanism 12 is shown).

  The main shaft side first piston 13 is disposed on the side surface of the clamp member 11 in a posture in which the operation axis is aligned with the horizontal direction. In the present embodiment, the two main shaft side first pistons 13 are arranged at positions on the outer peripheral portion of the clamp member 11 that face each other across the rotation axis G (in FIG. 7, one main shaft side first piston 13 is located. Only shown). The main shaft side first piston 13 is disposed between the main shaft side spring clamp mechanisms 12. Specifically, as shown in FIG. 9, the main shaft side first piston 13 includes a cylinder 13 a formed on the side surface of the clamp member 11 and a piston 13 b inserted into the cylinder 13 a.

  In the present embodiment, the main shaft side hydraulic circuit 14 is a hydraulic oil flow passage formed in a circular shape around the rotation axis G inside the clamp member 11, and includes a main body of the main shaft side spring clamp mechanism 12, and a main shaft. The cylinder 13a of the side first piston 13 is connected.

  The main shaft side member 30 is a cylindrical member, and includes a flange portion 31, an insertion hole 32, and a holding groove 32e. The upper side of the main shaft side member 30 is formed in a shape that engages with the workpiece W. In FIG. 7, a dummy workpiece V (a member for protecting the main shaft side member 30 and the tailstock side member 40 when the work holding unit A is replaced) is placed on the main shaft side member 30.

  The flange portion 31 is a flange-like portion and is a portion formed in the lower part of the main shaft side member 30.

  The insertion hole 32 is formed upward from the lower surface of the flange portion 31 in a state where the central axis (the axis corresponding to the central axis of the vertical hole 42a of the insertion hole 42 of the tailstock side member 40 described above) coincides with the vertical direction. Has been. The insertion hole 32 is formed at a position corresponding to the spindle spring clamp mechanism 12 so that the head 12c of the spindle spring clamp mechanism 12 is inserted. In the present embodiment, six insertion holes 32 are arranged at equal intervals on the outer periphery of the flange portion 31 on the circumference centered on the rotation axis G (in FIG. 7, only one insertion hole 32 is illustrated. Have been).

  The holding groove 32 e is a groove formed on the outer peripheral surface at the center of the main shaft side member 30, and is a groove that engages with the lower support plate 84 of the unit transport carriage 3. As shown in FIG. 7, the main shaft side member 30 is supported by the unit transport carriage 3 in a state where the holding groove 32 e is engaged with the lower support plate 84.

<Structure of tailstock>
The clamp member 21 of the tailstock mechanism 20 is a disk-shaped member, and is attached to the tailstock mechanism 20 in a posture in which the central axis coincides with the rotation axis G of the tailstock mechanism 20. The clamp member 21 is provided with the above-described tailstock-side spring clamp mechanism 22, tailstock-side first piston 23, and tailstock-side hydraulic circuit 24.

  The tailstock-side spring clamp mechanism 22 is configured so that the shaft portion 22b and the head portion 22c protrude from the lower surface of the clamp member 21 in a posture in which the operation axis (the central axis of the shaft portion 22b) coincides with the vertical direction. 21 is disposed on the lower surface. In the present embodiment, six tailstock-side spring clamp mechanisms 22 are arranged on the outer periphery of the clamp member 21 at equal intervals on the circumference around the rotation axis G (in FIG. 7, one tailstock side). Only the spring clamp mechanism 22 is shown).

  The tailstock-side first piston 23 is disposed on the side surface of the clamp member 21 in a posture in which the operation axis matches the horizontal direction. In the present embodiment, the two tailstock-side first pistons 23 are arranged at positions on the outer peripheral portion of the clamp member 21 facing each other across the rotation axis G (in FIG. 7, one tailstock-side first piston 23 is located. Only shown). The tailstock-side first piston 23 is disposed between the tailstock-side spring clamp mechanism 22. Specifically, as shown in FIG. 9, the tailstock-side first piston 23 includes a cylinder 23a formed on the side surface of the clamp member 21 and a piston 23b inserted into the cylinder 23a.

  In this embodiment, the tailstock hydraulic circuit 24 is a hydraulic oil flow passage formed in a circular shape around the rotation axis G inside the clamp member 21, and includes a main body of the tailstock spring clamp mechanism 22, and a heart. A cylinder 23a of the push side first piston 23 is connected.

  The tailstock member 40 is a columnar member and is configured to have a flange portion 41 and an insertion hole 42. The lower side of the tailstock member 40 is formed in a shape that engages with the workpiece W.

  The flange part 41 is a flange-like part, and is a part formed on the upper part of the tailstock side member 40.

  The insertion hole 42 is formed downward from the upper surface of the flange portion 41 in a state where the central axis (the central axis of the vertical hole 42a) coincides with the vertical direction. The insertion hole 42 is formed at a position corresponding to the tailstock-side spring clamp mechanism 22 so that the head 22c of the tailstock-side spring clamp mechanism 22 is inserted. In the present embodiment, six insertion holes 42 are arranged at equal intervals on the outer periphery of the flange portion 41 on the circumference around the rotation axis G (in FIG. 7, only one insertion hole 42 is shown. Have been).

  As shown in FIG. 7, the tailstock side member 40 is supported by the unit transport cart 3 in a state where the flange portion 41 is placed on the upper support plate 82 of the unit transport cart 3.

<Structure related to the unit transport cart 3>
The above-described upper carriage 80 of the unit conveyance carriage 3 includes a mounting table 81, an upper support plate 82, a lower support plate 84, a column 85, and a spring 86.

  The mounting table 81 is a plate-like member arranged horizontally. The main shaft side second piston 101 described above is disposed on the mounting table 81. The main shaft side second piston 101 is disposed at a position facing the main shaft side first piston 13 in a posture in which the operation axis is aligned with the operation direction of the horizontal direction and the main shaft side first piston 13. In the present embodiment, the two main shaft side second pistons 101 are arranged at positions facing each other across the rotation axis G.

  On the mounting table 81, the above-described third piston 103 (not shown) is disposed. The third piston 103 is arranged on the mounting table 81 in a state where the operation axis is in the horizontal direction and faces the main shaft mechanism 10, specifically, in a posture intersecting with the rotation axis G of the main shaft mechanism 10. That is, the third piston 103 is pushed by a force that moves the roller holding and moving mechanism 50 toward the main shaft mechanism 10 (the rotating mechanism N).

  The support column 85 is erected on the mounting table 81. In the present embodiment, four support columns 85 are erected in the vertical direction around the spindle-side member 30 and the tailstock-side member 40. The upper support plate 82 and the lower support plate 84 are plate-like members arranged horizontally. The lower support plate 84 is supported on the support column 85 and disposed on the mounting table 81. The upper support plate 82 is supported by the support column 85 and is disposed on the lower support plate 84. The upper support plate 82 and the lower support plate 84 are movable in the vertical direction along the support column 85. A spring 86 is disposed between the upper support plate 82 and the lower support plate 84 and between the lower support plate 84 and the mounting table 81. The upper support plate 82 and the lower support plate 84 are supported by the elastic force of the spring 86. As described above, the main shaft side member 30 is supported by the lower support plate 84 and the tailstock side member 40 is supported by the upper support plate 82. Therefore, the main shaft side member 30 and the tailstock side member 40 are supported by the upper carriage 80 of the unit transport carriage 3 in a state of being movable in the vertical direction.

  The above-described tailstock-side second piston 102 is disposed on the upper support plate 82. The tailstock-side second piston 102 is disposed at a position facing the tailstock-side first piston 23 in a top view in a posture in which the operation axis coincides with the horizontal direction and is parallel to the operation axis of the tailstock-side first piston 23. Is done. The tailstock-side second piston 102 disposed on the upper support plate 82 moves in the vertical direction together with the tailstock-side member 40. When the tailstock mechanism 20 is lowered and the clamp member 11 of the spindle mechanism 10, the spindle-side member 30, the tailstock-side member 40, and the clamp member 21 of the tailstock mechanism 20 are in contact with each other (state shown in FIG. 8), The operating axis of the tailstock-side second piston 102 and the operating axis of the tailstock-side first piston 23 coincide with each other. In the present embodiment, the two tailstock-side second pistons 102 are disposed at positions facing each other with the rotation axis G interposed therebetween.

  Here, the main shaft side second piston 101, the tailstock side second piston 102, and the cart side hydraulic circuit 104 will be described with reference to FIG. The main shaft side second piston 101 includes a cylinder 101a, a piston 101b, and a piston rod 101c. The tailstock-side second piston 102 includes a cylinder 102a, a piston 102b, and a piston rod 102c. The carriage side hydraulic circuit 104 is disposed on the upper carriage 80 of the unit conveying carriage 3 and connects the main spindle side second piston 101, the tailstock side second piston 102, and the third piston 103 (not shown).

  Note that a work holding unit rotating mechanism (not shown) that rotates the main shaft side member 30 and the tailstock side member 40 when the work holding unit A is exchanged is disposed in the upper carriage 80 of the unit conveyance carriage 3. The work holding unit rotation mechanism is constituted by, for example, an air cylinder or the like, and is controlled by the replacement control unit 4a.

<Work holding unit replacement work>
Hereinafter, the work holding unit A mounting operation (replacement) performed by the replacement control unit 4a will be described with reference to FIGS.

<State of FIG. 7>
The work holding unit A is placed on the unit transport carriage 3 and placed in front of the rotary plastic working apparatus 2. Then, the upper carriage 80 is moved into the rotary plastic working apparatus 2 and the work holding unit A is disposed at the replacement work position P1.

<State of FIG. 8 (FIG. 9)>
Next, the replacement control unit 4 a lowers the tailstock mechanism 20 to bring the clamp member 11 of the spindle mechanism 10, the spindle-side member 30, the tailstock-side member 40, and the clamp member 21 of the tailstock mechanism 20 into contact.

  The following description will be made with reference to the schematic diagrams of FIGS. FIG. 9 is a state schematically showing the same state as FIG. In this state, as described above, the clamp member 11 of the main shaft mechanism 10, the main shaft side member 30, the tailstock side member 40, and the clamp member 21 of the tailstock mechanism 20 are in contact. Accordingly, the head portion 12c of the spindle-side spring clamp mechanism 12 is inserted into the insertion hole 32 of the spindle-side member 30, and the head portion 22c of the tailstock-side spring clamp mechanism 22 is inserted into the insertion hole of the tailstock-side member 40. 42 is inserted.

  Further, at this time, the operation axis of the main shaft side first piston 13 and the operation axis of the main shaft side second piston 101 coincide with each other, and the piston rod 101c of the main shaft side second piston 101 becomes the piston of the main shaft side first piston 13. It arrange | positions in the position facing 13b. The operating axis of the tailstock-side first piston 23 and the operating axis of the tailstock-side second piston 102 coincide with each other, and the piston rod 102c of the tailstock-side second piston 102 faces the piston 23b of the tailstock-side first piston 23. Placed in position.

<State of FIG. 10>
Next, the replacement control unit 4a moves the roller holding / moving mechanism 50, specifically, moves the roller holding / moving mechanism 50 toward the rotating mechanism N (main shaft mechanism 10), and pushes the third piston 103. Then, the force from the roller holding and moving mechanism 50 is transmitted to the main spindle side second piston 101 and the tailstock side second piston 102 via the carriage side hydraulic circuit 104, and the main spindle side second piston 101 and the tailstock side second piston 102 are transmitted. Operates. Specifically, hydraulic pressure is supplied from the carriage side hydraulic circuit 104 to the main spindle side second piston 101, the piston rod 101c protrudes from the main spindle side second piston 101, and the piston rod 101c moves the piston 13b of the main spindle side first piston 13 away. Push. The hydraulic pressure is supplied from the carriage side hydraulic circuit 104 to the tailstock side second piston 102, the piston rod 102c protrudes from the tailstock side second piston 102, and the piston rod 102c pushes the piston 23b of the tailstock side first piston 23 (FIG. 10 states).

  When the spindle-side first piston 13 is pushed, the hydraulic pressure is supplied to the spindle-side spring clamp mechanism 12 via the spindle-side hydraulic circuit 14. Then, the head 12c moves upward, and the head 12c can enter the lateral hole of the insertion hole 32. When the tailstock-side first piston 23 is pushed, the hydraulic pressure is supplied to the tailstock-side spring clamp mechanism 22 via the tailstock-side hydraulic circuit 24. Then, the head portion 22c moves upward, and the head portion 22c can enter the lateral hole (42c) of the insertion hole 42.

<State of FIG. 11>
Next, the exchange control unit 4a operates the work holding unit rotation mechanism to rotate the main shaft side member 30 and the tailstock side member 40 about the rotation axis G. Then, the head portion 12c of the main shaft side spring clamp mechanism 12 enters the lateral hole of the insertion hole 32, and the head portion 22c of the tailstock side spring clamp mechanism 22 enters the lateral hole 42b of the insertion hole 42 (see FIG. 6).

<State of FIG. 12>
Finally, the replacement control unit 4 a moves the roller holding / moving mechanism 50 to separate the roller holding / moving mechanism 50 from the third piston 103. Then, the force from the roller holding and moving mechanism 50 disappears, and the supply of hydraulic pressure to the main shaft side spring clamp mechanism 12 and the tailstock side spring clamp mechanism 22 is stopped. As a result, the head portion 12 c of the spindle-side spring clamp mechanism 12 moves downward, and the spindle-side member 30 is fixed to the spindle mechanism 10. The head portion 22c of the tailstock side spring clamp mechanism 22 moves upward, and the tailstock member 40 is fixed to the tailstock mechanism 20. As described above, the work holding unit A (the main shaft side member 30 and the tailstock side member 40) is mounted on the rotation mechanism N (the main shaft mechanism 10 and the tailstock mechanism 20). Further, the removal of the work holding unit A from the rotation mechanism N is executed by the operation opposite to the above operation.

  The rotary plastic working apparatus 2 according to the present embodiment described above has the following configuration. The rotary plastic working device 2 has a spring clamp mechanism Q, a first piston R, and a second piston S. The spring clamp mechanism Q fixes the work holding unit A to the rotary mechanism N by the elastic force of the spring. When the hydraulic pressure is supplied from the first piston R, the work holding unit A and the rotation mechanism N are released from being fixed. When the first piston R is pushed by the second piston S, the hydraulic pressure is applied to the spring clamp mechanism Q. The second piston S is disposed away from the rotation mechanism N.

  The rotary plastic working apparatus 2 has a roller holding and moving mechanism 50 that moves the processing roller 63 to contact the workpiece W, and the force by which the second piston S pushes the first piston R causes the roller holding and moving mechanism 50 to move. It is generated by the force moved toward the rotation mechanism N.

  More specifically, the rotary plastic working device 2 includes a spindle-side spring clamp mechanism 12, a tailstock-side spring clamp mechanism 22, a spindle-side first piston 13, a tailstock-side first piston 23, and a spindle-side second piston 101. , A tailstock-side second piston 102 and a force branch mechanism T. The rotation mechanism N includes a spindle mechanism 10 and a tailstock mechanism 20. The work holding unit A includes a main shaft side member 30 and a tailstock side member 40.

  The spindle-side spring clamp mechanism 12 fixes the spindle-side member 30 to the spindle mechanism 10 by the elastic force of the spring, and when the hydraulic pressure is supplied from the spindle-side first piston 13, the spindle-side member 30 and the spindle mechanism 10 are fixed. Is released. The tailstock-side spring clamp mechanism 22 fixes the tailstock-side member 40 to the tailstock mechanism 20 by the elastic force of the spring, and when the hydraulic pressure is supplied from the tailstock-side first piston 23, the tailstock-side member 40, the tailstock mechanism 20, and the like. Release the lock.

  The main shaft side first piston 13 supplies hydraulic pressure to the main shaft side spring clamp mechanism 12 when pressed by the main shaft side second piston 101. The tailstock-side first piston 23 supplies hydraulic pressure to the tailstock-side spring clamp mechanism 22 when pushed by the tailstock-side second piston 102. Then, the force branching mechanism T (trolley side hydraulic circuit 104) branches the force for moving the roller holding and moving mechanism 50 toward the rotating mechanism N and transmits it to the main shaft side second piston 101 and the tailstock side second piston 102. To do.

  The second piston S (the main spindle side second piston 101 and the tailstock side second piston 102) is placed on a carriage (unit conveyance carriage 3, upper carriage 80) that is movable with respect to the rotation mechanism N.

(Other embodiments)
(1) In the above-described embodiment, the example in which the spring clamp mechanism Q is arranged on both the main spindle side and the tailstock side and the work holding unit A is attached / detached has been described. A configuration in which the spring clamp mechanism Q is attached or detached is also possible.

(2) In the above-described embodiment, the attachment / detachment of the work holding unit A in the rotary plastic working apparatus 2 has been described as an example, but application to a lathe or a machining center is also possible.

  Note that the configurations disclosed in the above-described embodiments (including the other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments unless there is a contradiction. The embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

DESCRIPTION OF SYMBOLS 1: Rotational plastic processing system 2: Rotational plastic processing apparatus 3: Unit conveyance cart 4: Control part 4a: Exchange control part 10: Main shaft mechanism 11: Clamp member 12: Main shaft side spring clamp mechanism 12b: Main shaft part 12c: Head 13 : Main shaft side first piston 13a: Cylinder 13b: Piston 14: Main shaft side hydraulic circuit 20: Tail push mechanism 21: Clamp member 22: Tail push side spring clamp mechanism 22b: Shaft portion 22c: Head portion 23: Tail push side first piston 23a : Cylinder 23b: Piston 24: Tailstock side hydraulic circuit 30: Main shaft side member 31: Flange part 32: Insertion hole 32e: Holding groove 40: Tailstock side member 41: Flange part 42: Insertion hole 42a: Vertical hole 42b: Horizontal hole 42c: U Gutter 42d: Upper surface 50: Roller holding and moving mechanism 60: Processing roller support unit 63: Processing roller 80: Dolly 81: Mounting table 82: Upper support plate 84: Lower support plate 85: Support column 86: Spring 88: Wheel 90: Lower carriage 91: Rail 92: Wheel 101: Spindle side second piston 101a: Cylinder 101b: Piston 101c: Piston Rod 102: Tailstock side second piston 102a: Cylinder 102b: Piston 102c: Piston rod 103: Third piston 104: Dolly side hydraulic circuit A: Workpiece holding unit B: Spindle attachment / detachment mechanism C: Tailstock attachment / detachment mechanism F: Roller attachment / detachment mechanism G: Rotating shaft N: Rotating mechanism P1: Replacement work position P2: Replacement work position P3: Standby position P4: Standby position Q: Spring clamp mechanism R: First piston S: Second piston T: Force branching mechanism V: Dummy work W: Work

Claims (4)

A rotary plastic working device that performs plastic working of a work by rotating a work holding unit holding a work by a rotating mechanism and bringing a roller into contact with the work,
A spring clamp mechanism, a first piston, and a second piston;
The spring clamp mechanism fixes the work holding unit to the rotation mechanism by the elastic force of a spring, and releases the fixation between the work holding unit and the rotation mechanism when hydraulic pressure is supplied from the first piston.
The first piston supplies hydraulic pressure to the spring clamp mechanism when pushed by the second piston,
The rotary plastic working device, wherein the second piston is disposed away from the rotation mechanism. A roller holding and moving mechanism for moving the roller and contacting the workpiece;
The rotary plastic working apparatus according to claim 1, wherein the force by which the second piston pushes the first piston is generated by a force that moves the roller holding and moving mechanism toward the rotating mechanism. A main shaft side spring clamp mechanism, a tailstock side spring clamp mechanism, a main shaft side first piston, a tailstock side first piston, a main shaft side second piston, a tailstock side second piston, and a force branch mechanism;
The rotating mechanism has a main shaft mechanism and a tailstock mechanism,
The work holding unit has a main shaft side member and a tailstock side member,
The main shaft side spring clamp mechanism fixes the main shaft side member to the main shaft mechanism by the elastic force of a spring, and fixes the main shaft side member and the main shaft mechanism when hydraulic pressure is supplied from the first main shaft side piston. Is released,
The tailstock-side spring clamp mechanism fixes the tailstock-side member to the tailstock mechanism by an elastic force of a spring, and when the hydraulic pressure is supplied from the tailstock-side first piston, the tailstock-side member, the tailstock mechanism, Unpin the
The main shaft side first piston supplies hydraulic pressure to the main shaft side spring clamp mechanism when pushed by the main shaft side second piston,
The tailstock side first piston supplies hydraulic pressure to the tailstock side spring clamp mechanism when pushed by the tailstock side second piston;
3. The rotation according to claim 2, wherein the force branching mechanism branches a force for moving the roller holding and moving mechanism toward the rotating mechanism and transmits the branched force to the main shaft side second piston and the tailstock side second piston. Plastic processing equipment.   The rotary plastic working apparatus according to claim 1, wherein the second piston is mounted on a carriage that is movable with respect to the rotation mechanism.

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