Thread rolling machine

Abstract

To simplify a clamp / unclamp mechanism of center axis angles of roll dices in a thread rolling machine.SOLUTION: A thread rolling machine includes: a revolving plate 211 which may revolve so that center axes C1, C1 of roll dices 112, 115 are arranged in non-parallel with a center axis CW of a workpiece 1; a slide base 212 stacked on the revolving plate 211; clamp parts 213 which generate restraining force for restraining the revolving plate 211 on the slide base 212; and compression parts 113, 116 which compress the slide base 212 so that the roll dices 112, 115 compress the workpiece 1. The clamp part 213 has a mechanism which reduces the restraining force as the compression parts 113, 116 displace the slide base 212 in a direction opposite to a compression direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a rolling machine. [Background technology]

[0002] Patent Document 1 describes a rolling machine that uses roll dies to perform rolling on a cylindrical workpiece. This rolling machine has an angle adjustment mechanism that adjusts the angle of the central axis of the roll dies to perform through-feed rolling. This angle adjustment mechanism is configured to be able to change the central axis angle (inclination angle) of the roll dies during rolling in order to diversify the rolling processes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3596278 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the type of rolling process, it is necessary to reliably fix the central axis angle of the roll die constant during rolling. Therefore, it is necessary to fix (clamp) the central axis angle of the roll die constant during rolling process, and release (unclamp) the fixed central axis angle of the roll die when setting up to adjust the central axis angle of the roll die to suit the workpiece.

[0005] If clamping / unclamping the central axis angle of the roll die is performed manually, the clamping / unclamping work becomes complicated. If clamping / unclamping the central axis angle of the roll die is performed automatically, the mechanism for performing the clamping / unclamping automatically becomes complicated.

[0006] In this regard, since the rolling machine of Patent Document 1 is based on the premise that the central axis angle of the roll die is changed during rolling processing, Patent Document 1 does not mention a clamping / unclamping mechanism for the central axis angle of the roll die.

[0007] The present invention has been made in consideration of such problems, and aims to simplify the clamping / unclamping mechanism for the central axis angle of the roll die in a rolling machine. [Means for solving the problem]

[0008] One aspect of the present invention is A cylindrical roll die that performs rolling on a cylindrical workpiece by being rotated while applying pressure to the workpiece; a support mechanism that rotatably supports the roll die; a pivot plate to which the support mechanism is fixed and which is pivotable so that the central axis of the roll die is not parallel to the central axis (CW) of the roll die; a slide base that is laminated with the pivot plate; a clamping portion that generates a restraining force for restraining the pivot plate to the slide base; a pressing unit that presses the slide base so that the roll die presses the workpiece, The clamping portion is located on a rolling machine having a mechanism for reducing the binding force as the pressing portion displaces the slide base in the direction opposite to the pressing direction. Effect of the Invention

[0009] In the rolling machine of the one aspect, the central axis angle of the roll die can be fixed (clamped) by the clamping portion, and the fixing of the central axis angle of the roll die can be released (unclamped) by utilizing the pressing portion.

[0010] With this configuration, according to the rolling machine of the above aspect, the clamping / unclamping mechanism can be simplified compared to a case where a dedicated mechanism is provided for releasing (unclamping) the fixed central axis angle of the roll die. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view showing a rolling machine according to the embodiment. [Diagram 2] FIG. 13 is a perspective view showing the rolling machine with the front door and the loading side cover open according to the embodiment. [Diagram 3] FIG. 2 is a front view showing the rolling machine according to the embodiment. [Figure 4] IV-IV cross-sectional view of FIG. 3. [Diagram 5] 2 is a cross-sectional view showing a clamped state of a first turning device of the rolling machine 10 according to the embodiment. FIG. [Figure 6] 2 is a cross-sectional view showing a first turning device of the rolling machine 10 according to the embodiment in an unclamped state. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Embodiment) 1. Configuration of the rolling machine 10 The configuration of the rolling machine 10 of this embodiment will be described with reference to Figs. 1 to 6. Fig. 1 is a perspective view of the entire rolling machine 10 including the overall cover 14. Fig. 2 is a perspective view of the rolling machine 10 with the front door 141b and the side movable cover part 142b of the overall cover 14 open. Fig. 3 is a schematic front view of the rolling machine 10 excluding the overall cover 14 and the like. Fig. 4 is a schematic view of the IV-IV section of Fig. 3. Fig. 5 is a schematic cross-sectional view of the first turning device 21 of the rolling machine 10 in a clamped state. Fig. 5 is a schematic cross-sectional view of the first turning device 21 of the rolling machine 10 in an unclamped state. In Figs. 1 to 6, the up and down arrows indicate the up and down directions in the direction of gravity. In Figs. 1 to 6, the front, back, left and right arrows indicate the front, back, left and right directions of the rolling machine 10.

[0013] The rolling machine 10 is a rolling device that performs rolling processing on the outer peripheral surface of the workpiece 1. The rolling machine 10 in this embodiment is a round die rolling machine that plastically deforms and rolls the outer peripheral surface of the workpiece 1 by rotating the two roll dies 112, 115 while applying pressure to the workpiece 1 so as to sandwich the workpiece 1 between them.

[0014] The rolling machine 10 of this embodiment rolls a screw thread on the outer peripheral surface of a cylindrical workpiece 1. Specifically, the rolling machine 10 is a ball screw forming rolling machine that forms a ball screw by rolling a screw thread on the outer peripheral surface of the cylindrical workpiece 1. The rolling machine 10 of this embodiment can also process gears.

[0015] 2. Detailed configuration of the rolling machine 10 As shown in Fig. 1 and Fig. 2, the rolling machine 10 includes a main body 11, a carry-in device 12, an unloading device 13, and an overall cover 14. The main body 11 is a rolling processing section that performs rolling on the workpiece 1 shown in Fig. 3. The carry-in device 12 is a carry-in section that carries the workpiece 1 before rolling into the main body 11. The unloading device 13 is a carry-out section that unloads the workpiece 1 that has been rolled in the main body 11 from the main body 11. The overall cover 14 covers the front, rear, and sides of the main body 11 and the unloading device 13 for the purposes of ensuring work safety and improving the work environment.

[0016] 3 and 4, the main body 11 has a base 111, a first roll die 112, a first pressurizing device 113, a first rotation drive device 114, a second roll die 115, a second pressurizing device 116, a second rotation drive device 117, a bush 118, and a coolant pan 119. The first pressurizing device 113, the first rotation drive device 114, the second pressurizing device 116, and the second rotation drive device 117 are a pressurizing drive unit that pressurizes and rotates the first roll die 112 and the second roll die 115.

[0017] The base 111 is installed on a horizontal floor surface FL (in other words, a horizontal plane). As shown in Fig. 4, the base 111 has a flat surface 111a that is angled at a predetermined angle θB (75 degrees in this example) with the floor surface FL.

[0018] A first pressure applying device 113, a first rotation driving device 114, a second pressure applying device 116, and a second rotation driving device 117 are fixed to a flat surface 111a of the base 111. Therefore, the first pressure applying device 113, the first rotation driving device 114, the second pressure applying device 116, and the second rotation driving device 117 are also arranged at a predetermined angle θB (75 degrees in this example) with respect to the floor surface FL.

[0019] The first pressurizing device 113 is a pressurizing unit that pushes the first roll die 112 toward the workpiece 1 along the flat surface portion 111a to apply pressure or returns it to the position before extrusion, as shown by an arrow P1 in Figures 3 and 4. The second pressurizing device 116 is a pressurizing unit that pushes the second roll die 115 toward the workpiece 1 along the flat surface portion 111a to apply pressure or returns it to the position before extrusion, as shown by an arrow P2 in Figures 3 and 4.

[0020] The first rotation drive device 114 rotates the first rolling die 112 as shown by an arrow R1 in Fig. 4. The second rotation drive device 117 rotates the second rolling die 115 in the same direction as the first rolling die 112 as shown by an arrow R2 in Fig. 4.

[0021] The first pressurizing device 113, the first rotary drive device 114, the second pressurizing device 116 and the second rotary drive device 117 rotate the first roll die 112 and the second roll die 115 while applying pressure to sandwich the workpiece 1, thereby rolling the workpiece 1.

[0022] The first rolling die 112 and the second rolling die 115 have a disk shape. The outer circumferential surfaces of the first rolling die 112 and the second rolling die 115 form rolling surfaces for rolling a screw thread into the workpiece 1.

[0023] 3 and 4, the first roll die 112 and the second roll die 115 are arranged vertically along the flat surface portion 111a of the base 111, with their respective central axes C1 and C2 facing substantially horizontally. The first roll die 112 is arranged above the second roll die 115 in the direction of gravity. In other words, the first roll die 112 and the second roll die 115 are positioned to sandwich the workpiece 1 at least in the direction of gravity.

[0024] As shown in FIG. 3, the first pressurizing device 113 has a first pressurizing motor 113a, a first drive belt 113b, and a first ball screw unit 113c. The first ball screw unit 113c incorporates a ball screw, a ball, and a bearing. The rotational driving force generated by the first pressurizing motor 113a is transmitted to the ball screw of the first ball screw unit 113c via the first drive belt 113b. When the rotational driving force generated by the first pressurizing motor 113a is transmitted to the ball screw of the first ball screw unit 113c, the first roll die 112 is displaced linearly along the flat portion 111a of the base 111 so as to approach or move away from the workpiece 1.

[0025] The second pressurizing device 116 has a second pressurizing motor 116a, a second drive belt 116b, and a second ball screw unit 116c, similar to the first pressurizing device 113. The second ball screw unit 116c incorporates a ball screw, balls, and bearings.

[0026] The rotational driving force generated by the second pressurizing motor 116a is transmitted to the ball screw of the second ball screw unit 116c via the second drive belt 116b. When the rotational driving force generated by the second pressurizing motor 116a is transmitted to the ball screw of the second ball screw unit 116c, the second roll die 115 is displaced linearly along the flat surface portion 111a of the base 111 so as to approach or move away from the workpiece 1. This allows the first roll die 112 and the second roll die 115 to apply pressure so as to sandwich the workpiece 1.

[0027] The first rotation drive device 114 has a first rotation drive motor 114a, a first drive gear 114b, a first input side constant velocity joint 114c, a first shaft 114d, and a first output side constant velocity joint 114e.

[0028] The rotational drive force generated by the first rotational drive motor 114a is transmitted to the first roll die 112 via the first drive gear 114b, the first input side constant velocity joint 114c, the first shaft 114d, and the first output side constant velocity joint 114e.

[0029] As described above, the first roll die 112 is linearly displaced by the first pressure device 113 so as to move closer to or away from the workpiece 1. However, because the first input side constant velocity joint 114c, the first shaft 114d, and the first output side constant velocity joint 114e are provided, the rotational driving force generated by the rotational driving motor 114a is transmitted to the first roll die 112 without hindrance.

[0030] Similar to the first rotation drive device 114, the second rotation drive device 117 has a second rotation drive motor 117a, a second drive gear 117b, a second input side constant velocity joint 117c, a second shaft 117d, and a second output side constant velocity joint 117e.

[0031] The rotational drive force generated by the second rotational drive motor 117a is transmitted to the second roll die 115 via the second drive gear 117b, the second input side constant velocity joint 117c, the second shaft 117d, and the second output side constant velocity joint 117e.

[0032] As described above, the second pressurizing device 116 linearly displaces the second roll die 115 so as to approach or move away from the workpiece 1, but because the second input side constant velocity joint 117c, the second shaft 117d, and the second output side constant velocity joint 117e are provided, the rotational driving force generated by the second rotational drive motor 117a is transmitted to the second roll die 115 without hindrance.

[0033] The bush 118 is a cylindrical support member into which the workpiece 1 carried into the main body 11 is inserted. A bearing for rotatably supporting the workpiece 1 is provided on the inner peripheral surface of the bush 118. The bush 118 is disposed closer to the carry-in device 12 side (right side in FIG. 3) than the first roll die 112 and the second roll die 115 in the axial direction of the workpiece 1 (left-right direction in FIG. 3).

[0034] A work rest (not shown) is fixed to the flat surface portion 111a of the base 111. The work rest is disposed at a position where it abuts against the workpiece 1 carried into the main body portion 11 from the flat surface portion 111a side. The work rest is disposed closer to the discharge device 13 side (left side in FIG. 3) than the bush 118 in the axial direction of the workpiece 1 (left-right direction in FIG. 3).

[0035] The coolant pan 119 is a plate-like member that receives the coolant sprayed toward the workpiece 1 from a coolant nozzle (not shown) from below in the direction of gravity. The coolant pan 119 is disposed below the second roll die 115 in the direction of gravity. The coolant pan 119 has a bent plate shape so as to prevent the coolant sprayed toward the workpiece 1 from scattering toward the front side of the main body 11 (the left side in FIG. 4).

[0036] The rolling machine 10 includes a first turning device 21 and a second turning device 22. The first turning device 21 and the second turning device 22 are devices for performing through-feed rolling (in other words, oblique axis rolling) on ​​the workpiece 1.

[0037] In through-feed rolling, the central axis C1 of the first roll die 112 and the central axis C2 of the second roll die 115 are made oblique (non-parallel) to the central axis CW of the workpiece 1. The first turning device 21 is a device for adjusting the angle of the central axis C1 of the first roll die 112 relative to the central axis CW of the workpiece 1. The second turning device 22 is a device for adjusting the angle of the central axis C2 of the second roll die 115 relative to the central axis CW of the workpiece 1.

[0038] 5 and 6 are cross-sectional views of the peripheral portion of the first turning device 21 of the rolling machine 10, cut along a plane parallel to the flat surface 111a of the base 111. Fig. 5 shows a clamped state in which the angle of the central axis C1 of the first rolling die 112 is fixed, and Fig. 6 shows an unclamped state in which the angle of the central axis C1 of the first rolling die 112 is released.

[0039] The first turning device 21 has a turning plate 211, a slide base 212, a clamp portion 213, and a turning motor (not shown).

[0040] The swivel plate 211 and the slide base 212 are plate-like members stacked on top of each other. A support mechanism 23 that rotatably supports the first roll die 112 is fixed to the swivel plate 211. A first ball screw unit 113c of the first pressurizing device 113 is fixed to the slide base 212. When the first pressurizing motor 113a of the first pressurizing device 113 is driven, a driving force is transmitted from the first pressurizing motor 113a to the first ball screw unit 113c via the first drive belt 113b, and the slide base 212 moves.

[0041] The clamp unit 213 switches between clamping and unclamping the swivel plate 211 and the slide base 212. In the clamped state, the swivel plate 211 is fixed to the slide base 212 and does not rotate. In the unclamped state, the swivel plate 211 becomes rotatable within a plane parallel to the layered surface with the slide base 212 (within a plane perpendicular to the paper in FIGS. 5 and 6).

[0042] The clamp portion 213 has a disc spring 213a, a pull bolt 213b, and a stopper 213c. The stopper 213c is fixed at a position on the opposite side to the pressure application side (upper side in FIG. 5) of the slide base 212. The stopper 213c is fixed to the base 111 via a stopper base 214d. The opposite side to the pressure application direction by the first pressure device 113 is the side opposite to the pressure application direction.

[0043] Pull bolt 213b is a cylindrical member that penetrates swivel plate 211 and slide base 212. A head portion with a large diameter is formed on both ends of pull bolt 213b. Pull bolt 213b is configured to be displaceable in the axial direction (the vertical direction in FIGS. 5 and 6) independently of swivel plate 211 and slide base 212. Of the two head portions of pull bolt 213b, the one located on the opposite pressure side is formed with a contact surface 213d that can come into contact with stopper 213c.

[0044] The disc spring 213a is disposed in a compressed state between the head of the pull bolt 213b on the anti-pressure side and the slide base 212, and generates a biasing force that biases the slide base 212 toward the rotating plate 211. In other words, the disc spring 213a is an elastic member that generates a binding force that binds the rotating plate 211 to the slide base 212.

[0045] The pull bolt 213b is a clamping member that clamps the rotating plate 211, the slide base 212, and the disc spring 213a from the outside and compresses the disc spring 213a.

[0046] As described above, the swivel plate 211 is configured to be swivelable within a plane parallel to the layering plane with the slide base 212 (within a plane perpendicular to the paper in Figs. 5 and 6). On the other hand, the pull bolt 213b is supported by the slide base 212 so as not to swivel. For this reason, the hole in the swivel plate 211 through which the pull bolt 213b passes is an elongated hole so that the rotation of the swivel plate 211 is not hindered by the pull bolt 213b.

[0047] 5 shows a state in which the slide base 212 is in the original position. When the slide base 212 is in the original position, the abutment surface 213d of the pull bolt 213b is separated from the stopper 213c. In this state, the slide base 212, the rotating plate 211, and the disc spring 213a are sandwiched between both heads of the pull bolt 213b.

[0048] Therefore, the slide base 212 is pressed against the rotating plate 211 by the biasing force of the disc spring 213a, so that the rotating plate 211 and the slide base 212 are in a clamped state. The slide base 212 is connected to the rotating plate 211 by frictional force. Furthermore, the rotating plate 211 and the slide base 212 may be connected to each other by a pin (convex portion) or the like.

[0049] 6 shows a state in which the first pressure device 113 has retracted the slide base 212 to the opposite pressure side (upper side in FIG. 6) from the original position. When the first pressure device 113 retracts the slide base 212 to the opposite pressure side from the original position, the abutment surface 213d of the pull bolt 213b abuts against the stopper 213c. This causes the disc spring 213a to be further compressed between the head of the pull bolt 213b on the opposite pressure side and the slide base 212, and the pull bolt 213b is displaced toward the pressure side (lower side in FIG. 6) relative to the slide base 212.

[0050] Therefore, the rotating plate 211 is no longer sandwiched between both heads of the pull bolt 213b, and the rotating plate 211 and the slide base 212 are in an unclamped state. In other words, the binding force binding the rotating plate 211 to the slide base 212 is reduced. In a configuration in which the rotating plate 211 is positioned lower than the slide base 212 in the direction of gravity as shown in Fig. 6, in the unclamped state, the rotating plate 211 moves away from the slide base 212 due to its own weight.

[0051] When the turning plate 211 and the slide base 212 are in an unclamped state, a turning motor (not shown) generates a turning drive force for turning the turning plate 211 in a plane parallel to the layered surface with the slide base 212 (in a plane perpendicular to the paper surface in FIG. 6) to adjust the angle of the central axis C1 of the first roll die 112 with respect to the central axis CW of the workpiece 1.

[0052] The second turning device 22 has basically the same configuration and function as the first turning device 21. That is, the second turning device 22 is configured symmetrically in the up-down direction with respect to the first turning device 21, and adjusts the angle of the central axis C2 of the second roll die 115. Therefore, illustration and detailed description of the second turning device 22 are omitted.

[0053] As shown in Fig. 3, the carry-in device 12 has a carry-in table 121, a carry-in hand 122, a carry-in hand slide device 123, and a retraction caster 124. The carry-in table 121 is a table on which the workpiece 1 is placed. The carry-in hand 122 is a carry-in side gripping part that grips the workpiece 1 when carrying the workpiece 1 placed on the carry-in table 121 into the main body 11. The carry-in hand slide device 123 is a device that slides the carry-in hand 122 back and forth between the carry-in device 12 and the main body 11. The retraction caster 124 has wheels that enable the carry-in device 12 to slide backward (toward the back of the paper in Fig. 3).

[0054] The carry-in hand 122 grips a portion of the workpiece 1 that is on the carry-in front side (to the right side in FIG. 3) of the portion to be rolled. When the carry-in hand slide device 123 slides the carry-in hand 122 closest to the main body 11, the carry-in hand 122 is located on the carry-in front side (to the right side in FIG. 3) of the bush 118. When the carry-in hand slide device 123 slides the carry-in hand 122 towards the main body 11 with the carry-in hand 122 gripping the workpiece 1, the workpiece 1 is inserted into the bush 118.

[0055] 1, the carry-in table 121, the carry-in hand 122, and the carry-in hand slide device 123 of the carry-in device 12 are covered by a carry-in device cover 125. The carry-in device cover 125 is provided with an opening and closing input door 125a. When the workpiece 1 is input into the carry-in table 121, the input door 125a is manually opened by an operator.

[0056] 3, the unloading device 13 has a unloading hand 131, an unloading chute 132, and an unloading hand slide mechanism 133. The unloading hand 131 is an unloading side gripping part that grips the workpiece 1 that has been rolled in the main body 11 when unloading the workpiece 1 to the unloading chute 132.

[0057] The carry-out chute 132 is an inclined plate-like member that allows the workpiece 1 carried out by the carry-out hand 131 to roll by gravity to a place where the worker can take it out, and is disposed below the carry-out hand 131 in the direction of gravity. The carry-out hand slide mechanism 133 is a slide part that slides the carry-out hand 131 back and forth between the main body 11 and the carry-out device 13. The carry-out hand slide mechanism 133 is disposed above the workpiece 1 in the direction of gravity.

[0058] With the carry-out hand 131 gripping the workpiece 1, the carry-out hand slide mechanism 133 slides the carry-out hand 131 to the carry-out side (the left side in FIG. 3) and when the carry-out hand 131 reaches above the carry-out chute 132, the carry-out hand 131 releases the workpiece 1. As a result, the workpiece 1 falls by its own weight onto the carry-out chute 132, and then rolls down along the inclination of the carry-out chute 132 to the bottom end of the carry-out chute 132.

[0059] As shown in FIGS. 1 and 2, the entire cover 14 has a front cover 141, a carry-in side cover 142, an unloading side cover 143, and a rear cover 144.

[0060] The front cover 141 is located on the front side of the main body 11 and the discharge device 13, and has a front fixed cover part 141a and a front door 141b. The front fixed cover part 141a is located on the front side of the discharge device 13. An outlet 141c is opened in the front fixed cover part 141a. The outlet 141c is provided for removing the workpiece 1 on the discharge chute 132.

[0061] The front door 141b is a sliding door that can be opened and closed, is closed during rolling processing, and is opened during maintenance, etc. The front door 141b is provided with a window that allows an operator to visually check the rolling processing status. When the front door 141b is closed, it is located on the front side of the main body 11, and when it is open, it overlaps with the front fixed cover part 141a. When the front door 141b is opened, an operator can access the first roll die 112 and the second roll die 115 of the main body 11 and their surrounding areas.

[0062] The carry-in side cover 142 is a side cover located on the side of the main body 11 facing the carry-in device 12, and has a side fixed cover part 142a and a side movable cover part 142b. The side fixed cover part 142a is disposed rearward of the carry-in device 12.

[0063] The side movable cover part 142b is located between the main body part 11 and the carry-in device 12. The side movable cover part 142b and the carry-in device 12 are connected to a retracting slide mechanism (not shown). The retracting slide mechanism is a mechanism that enables the side movable cover part 142b and the carry-in device 12 to slide horizontally to the rear side (in other words, in a direction perpendicular to the carry-in direction of the workpiece 1). The sliding movement of the side movable cover part 142b and the carry-in device 12 is performed manually by an operator.

[0064] When the side movable cover part 142b and the carry-in device 12 are returned to the position during processing, they are positioned by a positioning pin (not shown). This makes it possible to reliably and easily ensure the accuracy of the carry-in position of the workpiece 1 by the carry-in device 12 during processing.

[0065] The unloading side cover 143 is a side cover located on the side of the main body 11 facing the unloading device 13. The rear cover 144 is located on the rear side of the main body 11.

[0066] 2 shows the rolling machine 10 in a state where the front door 141b is open and the side movable cover part 142b and the carry-in device 12 are retreated to the rear side. In the following, the state where the front door 141b is open and the side movable cover part 142b and the carry-in device 12 are retreated to the rear side is referred to as a "state where the front door 141b and the side movable cover part 142b are open," and the state where the front door 141b is closed and the side movable cover part 142b and the carry-in device 12 are returned to their positions during processing is referred to as a "state where the front door 141b and the side movable cover part 142b are closed."

[0067] When the front door 141b and the side movable cover part 142b are closed, the corner CN (encircled by a thick dashed line in FIG. 2) between the front door 141b and the side movable cover part 142b has a frameless structure without a pillar. This allows a large maintenance space to be formed when the front door 141b and the side movable cover part 142b are open.

[0068] Although not shown in the figure, the front door 141b and the movable side cover part 142b are shaped to interlock with each other when both are closed. The rolling machine 10 is equipped with an electromagnetic lock (not shown). The electromagnetic lock locks the front door 141b and the movable side cover part 142b in the closed state. When the electromagnetic lock detects that the front door 141b and the movable side cover part 142b are locked in the closed state, the rolling operation by the rolling machine 10 can be started.

[0069] The rolling machine 10 is provided with an operation panel (not shown) and a control device (not shown). The operation panel is provided with a start switch for the rolling machine 10, an emergency stop switch, various setting switches, various displays, etc.

[0070] The control device is a device that controls the operation of the rolling machine 10, and is composed of a microcomputer including a CPU, ROM, RAM, etc., and its peripheral circuits. The control device performs various calculations and processing based on a control program stored in the ROM, and controls the operation of the controlled devices such as the first pressurizing motor 113a, the second pressurizing motor 116a, the first rotation drive motor 114a, the second rotation drive motor 117a, the carry-in hand slide device 123, and the carry-out hand slide mechanism 133.

[0071] 3. Operation process by the rolling disk 10 The operation process of the rolling machine 10 is roughly divided into a carry-in process, a rolling process, and a carry-out process. In the initial setting stage, the first pressure device 113 and the second pressure device 116 are retracted to the anti-pressure side to put the first swivel device 21 and the second swivel device 22 into an unclamped state, and in the unclamped state, the respective swivel motors are started to adjust the angle of the central axis C1 of the first roll die 112 and the angle of the central axis C2 of the second roll die 115 in accordance with the processing of the workpiece 1. (Carry-in process) In the loading step, an operator places the workpiece 1 on the loading table 121 of the loading device 12 and presses a start switch on the operation panel. When the start switch on the operation panel is pressed, a control program of the control device is executed.

[0072] When the control program of the control device is executed, the carry-in hand 122 of the carry-in device 12 grips the workpiece 1, and the carry-in hand slide device 123 slides the carry-in hand 122 toward the main body 11 (the left side in FIG. 3). As a result, the workpiece 1 is carried into the main body 11 and inserted into the bush 118, and the process proceeds to the next rolling process.

[0073] When the workpiece 1 is loaded into the main body 11, the loading hand releases the workpiece 1 in preparation for the next loading step, and the loading hand slide device 123 slides the loading hand 122 back toward the loading device 12 side.

[0074] (Rolling process) In the rolling process, the first rolling die 112 is pushed out from its original position toward the workpiece 1 by the first pressure device 113, and the second rolling die 115 is pushed out from its original position toward the workpiece 1 by the second pressure device 116. Furthermore, the first rolling die 112 is rotationally driven by the first rotation drive device 114, and the second rolling die 115 is rotationally driven in the same direction as the first rolling die 112 by the second rotation drive device 117.

[0075] As a result, the first roll die 112 and the second roll die 115 rotate while applying pressure to sandwich the workpiece 1, thereby rolling the workpiece 1. During the rolling process, coolant is sprayed toward the workpiece 1 from a coolant nozzle (not shown).

[0076] When the rolling process of the workpiece 1 is completed, the rotational drive of the first roll die 112 and the second roll die 115 by the first rotation drive device 114 and the second rotation drive device 117 is stopped, and the first roll die 112 and the second roll die 115 are moved away from the workpiece 1 by the first pressure device 113 and the second pressure device 116 and returned to their original positions, and the process proceeds to the unloading process.

[0077] (Export process) In the carrying-out process, the carrying-out hand slide mechanism 133 slides the carrying-out hand 131 to the closest position to the main body 11 (the right side in FIG. 3), and then the carrying-out hand 131 grips the workpiece 1. When the carrying-out hand 131 grips the workpiece 1, the carrying-out hand slide mechanism 133 slides the carrying-out hand 131 to the closest position to the carrying-out side (the left side in FIG. 3), and then the carrying-out hand 131 releases the workpiece 1.

[0078] As a result, the workpiece 1 falls under its own weight onto the discharge chute 132, and then rolls down along the incline of the discharge chute 132 to the bottom end of the discharge chute 132. The workpiece 1 that has rolled down to the bottom end of the discharge chute 132 is removed by an operator.

[0079] 4. Effects of the rolling machine 10

[0080] The following describes the action and effect of the first swivel device 21. The clamp portion 213 of the first swivel device 21 reduces the restraining force that restrains the swivel plate 211 to the slide base 212 as the first pressure device 113 displaces the slide base 212 in the opposite pressure direction.

[0081] As a result, the fixing of the central axis angle of the first roll die 112 can be released (unclamped) by utilizing the first pressurizing device 113, and the configuration can be simplified compared to the case where a dedicated unclamping mechanism is provided.

[0082] Specifically, the clamp portion 213 has a disc spring 213a, a pull bolt 213b, and a stopper 213c. When the pull bolt 213b is spaced apart from the stopper 213c, the pivot plate 211 is sandwiched between the pull bolt 213b and the slide base 212, generating a binding force.

[0083] When the first pressure device 113 displaces the slide base 212 in the opposite direction to the pressure application direction, the pull bolt 213b comes into contact with the stopper 213c, and the restraining force is reduced by removing the pivot plate 211 from being sandwiched between the pull bolt 213b and the slide base 212. This allows the configuration of the clamp unit 213 to be simplified.

[0084] The first pressurizing device 113 displaces the slide base 212 from the original position in the pressurizing direction in the rolling process, and when adjusting the central axis angle of the first roll die 112, the first pressurizing device 113 displaces the slide base 212 in the opposite pressurizing direction from the original position. When the slide base 212 is in the original position, the pull bolt 213b is in a position separated from the stopper 213c. This makes it possible to prevent the slide base 212 from being unclamped by mistake when it is in the original position.

[0085] The action and effect of the second swivel device 22 is similar to that of the first swivel device 21, and therefore a description thereof will be omitted.

[0086] The present invention is not limited to the above-described embodiment, and different embodiments can be configured without departing from the spirit of the present invention. The present invention also includes various modifications, modifications within the scope of the equivalents, and the like.

[0087] For example, in the above embodiment, the flat surface 111a of the base 111 has a predetermined angle θB (75 degrees in this example) with respect to the floor surface FL, but the flat surface 111a of the base 111 does not have to have a predetermined angle θB with respect to the floor surface FL. In other words, the flat surface 111a of the base 111 may be parallel to the floor surface FL.

[0088] In the above embodiment, the disc spring 213a is used as an elastic member that generates a restraining force to restrain the rotating plate 211 to the slide base 212, but this is not limited to the disc spring 213a, and various elastic members such as a coil spring may be used. [Explanation of symbols]

[0089] 1 Workpiece 112 First Roll Dice (Roll Dice) 113 First pressure device (pressure section) 212 Slide Base 213 Clamp section 213a Disc spring (elastic member) 213b Pull bolt (clamping member) 213c Stopper 23 Support mechanism

Claims

1. A cylindrical roll die that performs rolling on a cylindrical workpiece by being rotated while applying pressure to the workpiece; a support mechanism that rotatably supports the roll die; a pivot plate to which the support mechanism is fixed and which is pivotable so that a central axis of the roll die is not parallel to a central axis of the roll die; a slide base that is laminated with the pivot plate; a clamping portion that generates a restraining force for restraining the pivot plate to the slide base; a pressing unit that presses the slide base so that the roll die presses the workpiece, The clamp portion has a mechanism for reducing the restraining force as the pressure applying portion displaces the slide base in the direction opposite to the pressure applying direction.

2. The slide base is stacked on the opposite side of the pressure direction to the rotating plate, The clamp portion is an elastic member disposed on the opposite side of the slide base from the pivot plate; a clamping member that clamps the pivot plate, the slide base, and the elastic member from outside and compresses the elastic member; a stopper that comes into contact with the pinching member when the pressing portion displaces the slide base in a pressing direction; The clamping member is displaceable relative to the pivot plate and the slide base, When the clamping member is spaced apart from the stopper, the pivot plate is clamped between the clamping member and the slide base, thereby generating the restraining force.

2. The rolling machine according to claim 1, wherein when the clamping member is in contact with the stopper, the swivel plate is no longer clamped between the clamping member and the slide base, thereby reducing the restraining force.

3. In the rolling process of performing rolling on the workpiece, the pressing unit displaces the slide base from an original position in a pressing direction, When adjusting the angle of the central axis of the roll die, the pressing unit displaces the slide base in a direction opposite to the pressing direction from the original position, The rolling machine according to claim 2 , wherein the clamping member is located away from the stopper when the slide base is in the original position.

Images