Rolling machine

Abstract

To change the direction in which the machining surface of a die faces.SOLUTION: A rolling machine of the present invention is configured based on a first axial direction, a second axial direction, and a third axial direction that are orthogonal to one another. A workpiece is supported by the support device so as to be rotatable about the first axial direction. The workpiece is sandwiched between a pair of dies in the second axial direction. The pair of dies are separately fixed to a pair of sliding tables, and the pair of sliding tables face each other in the second axial direction. A pair of machining reciprocating devices for machining the workpiece causes the pair of sliding tables to linearly reciprocate together with the pair of dies in the third axial direction. In addition, a posture in which the processing surface of the die faces the second axis direction as viewed from the third axis direction is defined as a basic posture of the die, and a posture in which the processing surface faces a direction inclined with respect to the second axis direction is defined as an inclined posture of the die. Each sliding table is fixed to an inner frame so that the sliding table takes the basic posture and the inclined posture of the die, the inner frame is rotatably guided by an outer frame, and the inner frame is rotated by a rotating and inclining device.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] The rolling machine is equipped with a pair of dies that clamp a rotatably supported workpiece, and a pair of sliders to which the pair of dies are separately fixed. The workpiece is rolled by moving the pair of sliders in opposite directions while clamping the workpiece (Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-240088 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-62633 Summary of the Invention [Problem to be solved by the invention]

[0004] In the rolling machines disclosed in Patent Documents 1 and 2, the direction in which the die machining surface faces is always constant. However, there are cases in which it is desired to change the direction in which the die machining surface faces. In such cases, one method of addressing this issue is to insert a shim between the die and the sliding table to tilt the die. Incidentally, Patent Documents 1 and 2 also describe inserting a spacer between the die and the sliding table to adjust the distance between the die machining surfaces. However, regardless of whether a spacer is inserted between the sliding table and the die, the direction in which the die machining surface faces is always constant. The shim is inserted between the sliding table and the die to tilt the die, regardless of whether a spacer is inserted.

[0005] However, when using shims to address this issue, it is necessary to adjust the position of the shim between the slide and the die to adjust the direction in which the die's machining surface faces, or to prepare shims of different thicknesses. Therefore, an easier solution is desirable.

[0006] The present invention was created in consideration of the above circumstances, and its purpose is to make it possible to change the direction in which the processing surface of the die faces. [Means for solving the problem]

[0007] In describing the rolling machine of the present invention, a first axis direction, a second axis direction, and a third axis direction are used, which are perpendicular to each other. The rolling machine of the present invention comprises a support device that supports a workpiece rotatably around a first axis direction, a pair of dies that clamp the workpiece supported by the support device in a second axis direction, a pair of sliding tables to which the pair of dies are separately fixed and which face each other in the second axis direction, and a pair of reciprocating processing devices that process the workpiece by moving the pair of sliding tables back and forth linearly together with the pair of dies in a third axis direction. In addition to the above, the rolling machine of the present invention is characterized by comprising a pair of inner frames that guide a pair of sliding tables separately in the third axis direction and face each other in the second axis direction, an outer frame that is arranged outward of the pair of opposing inner frames when viewed from the third axis direction and rotatably guides the pair of inner frames, and a pair of rotating and tilting devices that can rotate the pair of inner frames separately, so that the die can be changed between the basic position and the inclined position when the basic position of the die is the position in which the machining surface of the die faces the second axis direction when viewed from the third axis direction, and the inclined position of the die is the position in which the machining surface faces in a direction inclined with respect to the second axis direction.

[0008] Depending on the magnitude of the rotational force generated in the pair of inner frames during workpiece machining, the inner frames may tend to rotate. In such cases, it is desirable to do the following. The rolling machine of the present invention is provided with stopping devices that separately stop a pair of inner frames so that they cannot rotate. Furthermore, the stopping devices are a first stopping device that applies a stopping force to the inner frames in their radial direction, and a second stopping device that applies a stopping force to the pair of inner frames in the opposite direction to the rotational force generated in the pair of inner frames during processing of a workpiece. [Effects of the Invention]

[0009] In the rolling machine of the present invention, the inner frame is rotated by a rotating and tilting device, which causes the slider and die to rotate together with the inner frame, changing the die from its basic position to an inclined position, making it easy to change the direction in which the die's machining surface faces. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a front view showing a rolling machine according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a side view showing the rolling machine of the first embodiment. [Figure 3] FIG. 2 is a plan view showing the rolling machine of the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along the line ABCDEFGHIJ in FIG. 3. [Figure 5] Figures (A) and (B) are cross-sectional views taken along line VV in Figure 1, where Figure (A) shows the basic position of the die and Figure (B) shows the inclined position of the die. [Figure 6] 1. (A) and (B) are cross-sectional views taken along line VI-VI in FIG. 1, with (A) showing the inner frame in a clamped state and (B) showing the inner frame in an unclamped state. DETAILED DESCRIPTION OF THE INVENTION

[0011] The rolling machine of the first embodiment of the present invention is a vertical type. When describing the rolling machine of the first embodiment, the X-axis direction, Y-axis direction, and Z-axis direction will be used. The X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to one another. The X-axis direction in this embodiment is the "first axis direction" of the present invention, also referred to as the front-to-back direction. The X-axis direction is a direction perpendicular to the plane of the paper in Figure 1. The X-axis direction is a direction in which a workpiece to be machined on the rolling machine is rotatably supported. The Y-axis direction in this embodiment is the "second axis direction" of the present invention, also referred to as the left-to-right direction. The Y-axis direction is a direction in which the workpiece is sandwiched. The Z-axis direction in this embodiment is the "third axis direction" of the present invention, also referred to as the up-down direction. An example of a workpiece W is shown in Figure 5.

[0012] As shown in Figures 1 to 4, the rolling machine basically comprises a support device 10 that rotatably supports the workpiece while clamping it in the X-axis direction, a pair of dies 1 that clamp the workpiece in the Y-axis direction, a pair of sliding tables 2 to which the pair of dies 1 are separately fixed, a holder 3 for fixing the dies 1 to each sliding table 2, a pair of reciprocating machining devices 20 that machine the workpiece by linearly reciprocating the pair of sliding tables 2 together with the pair of dies 1 in opposite directions along the Z-axis, a synchronization device (not shown) that synchronizes the operation of the pair of reciprocating machining devices 20 to make the moving speeds of the pair of dies 1 the same, and a frame 30 for fixing various devices.

[0013] The frame 30 allows the pair of sliding bases 2 to slide independently in the Z-axis direction, i.e., guides the pair of sliding bases 2 slidably in the Z-axis direction, and surrounds the pair of sliding bases 2 together from the front, back, left, and right as viewed from the Z-axis direction. In other words, the pair of sliding bases 2 are arranged inside the frame 30 as viewed from the Z-axis direction, facing each other in the Y-axis direction.

[0014] The support device 10 includes a pair of centers 11 facing each other in the X-axis direction, a pair of core stocks 12 that separately fix the pair of centers 11, and a pair of support reciprocating devices 13 that separately reciprocate the pair of core stocks 12 back and forth in the X-axis direction. The support reciprocating device 13 is well known, and may be, for example, one that converts rotational motion into linear reciprocating motion or a fluid pressure cylinder. The fluid pressure cylinder is a hydraulic cylinder or a pneumatic cylinder. The front support reciprocating device 13 converts rotational motion into linear reciprocating motion, and is fixed to the outside (front side) in the X-axis direction of the front surface of the frame 30. The front tailstock 12 is fixed on top of the front support reciprocating device 13. The front center 11 is fixed to the front tailstock 12 in a state where it extends rearward. The rear support reciprocating device 13 is the same as the front support reciprocating device 13, and is fixed to the outside (rear side) in the X-axis direction relative to the rear surface of the frame 30. The rear tailstock 12 and rear center 11 are configured in the same way as the front tailstock 12 and front center 11. When the support device 10 supports a workpiece, the workpiece is sandwiched between a pair of centers 11 and supported so as to be rotatable about the X-axis direction.

[0015] In this embodiment, the die 1 is a flat die 1. The pair of dies 1 face each other in the Y-axis direction. The facing surfaces of the pair of dies 1 are processing surfaces for transferring the shape of the die 1 to the workpiece.

[0016] The slide 2 is a plate material whose thickness direction is the Y-axis direction. The slide 2 is elongated in the Z-axis direction, which is the reciprocating direction. A pair of slides 2 face each other in the Y-axis direction. A die 1 is fixed to the surface of each slide 2 facing the Y-axis direction via a spacer 4. In other words, the spacer 4 is sandwiched between the die 1 and the slide 2. The distance between the pair of dies 1 in the Y-axis direction is adjusted by the spacer 4. Although one spacer 4 is fixed between the die 1 and the slide 2 in the figure, in reality, two spacers 4 are fixed in contact with each other in the Y-axis direction. The two spacers 4 are plate materials that contact each other at an inclined surface. The overall thickness of the two spacers 4 in the Y-axis direction can be adjusted by moving the two spacers 4 relative to each other in the Z-axis direction. In addition, a positioning member 5 for positioning the spacer 4 and the die 1 in the X-axis direction is fixed to the surface of the slide 2 facing the Y-axis direction (see Figure 3).

[0017] The holder 3 fixes the die 1 to the sliding table 2 via a spacer 4. In Fig. 4, the holder 3 is arranged above and below the die 1. The holder 3 is fixed to the sliding table 2 in such a way that it sandwiches the die 1 from above and below.

[0018] The reciprocating machining devices 20 are well known and will be described in detail later. The synchronizing device synchronizes the operation of the pair of reciprocating machining devices 20, moving one slide 2 and the other slide 2 in opposite directions along the Z axis (downward and upward directions) at the same speed to perform rolling on the workpiece.

[0019] In the basic configuration described above, the direction in which the processing surface of the die 1 faces when viewed from the Z-axis direction is a fixed direction, the Y-axis direction. As shown in FIG. 5(A), the position in which the die 1 faces the Y-axis direction is referred to as the basic position of the die 1. In other words, in the rolling machine of the first embodiment, the position in which the processing surface of the die 1 faces the Y-axis direction is the basic position of the die 1. As shown in FIG. 5(B), the position in which the die 1 faces a direction inclined with respect to the Y-axis direction when viewed from the Z-axis direction is referred to as the inclined position of the die 1. In order to enable the rolling machine of the first embodiment to change the die 1 between the basic position and the inclined position, the rolling machine of the first embodiment includes the support device 10, a pair of dies 1, a pair of slides 2, a pair of holders 3, a pair of reciprocating processing devices 20, and a synchronization device as the same components as the basic configuration, and the frame 30 as the different components from the basic configuration, which is composed of two frames. More specifically, the frame 30 is composed of a pair of inner frames 40 facing each other in the Y-axis direction, and an outer frame 50 that supports the pair of inner frames 40 from the outside when viewed from the Z-axis direction. In addition, the rolling machine of the first embodiment further includes a pair of rotation and tilt devices 60 that allow the pair of inner frames 40 to rotate separately, and a first stop device 70 and a second stop device 80 that stop the pair of inner frames 40 so that they cannot rotate separately.

[0020] As shown in Fig. 4, the machining reciprocating device 20 includes a ball screw 21 and a motor 22 (servo motor) that drives the ball screw 21. More specifically, the ball screw 21 is built into the inner frame 40. The ball screw 21 is composed of a screw shaft 23 that is arranged parallel to the Z-axis direction, a nut 24 that is fitted onto the screw shaft 23, and balls (not shown) that are housed between the screw shaft 23 and the nut 24. The motor 22 is fixed to the upper side of the inner frame 40 in the drawing, and rotates the screw shaft 23 clockwise and counterclockwise.

[0021] The upper end of the screw shaft 23 is connected to the rotary shaft of the motor 22. The upper and lower ends of the screw shaft 23 are rotatably supported by the inner frame 40.

[0022] As described above, the nut 24 is fitted onto the screw shaft 23 via a ball, and is also fixed to the sliding base 2. The nut 24 is fixed to the middle portion of the sliding base 2 in the Z-axis direction. Furthermore, an inner frame 40 is disposed adjacent to the outer surface of the pair of sliding bases 2 in the Y-axis direction. The inner frame 40 prevents the sliding base 2 from rotating together with the nut 24 when the screw shaft 23 rotates, and also guides the sliding base 2 to be slidable in the Z-axis direction.

[0023] The inner frame 40 is composed of multiple parts. With respect to the reciprocating machining device 20, the inner frame 40 is composed of a pair of bearings 41 that separately rotatably support the upper and lower ends of the ball screw 21, and an inner frame main body 42 that houses the nut 24 sandwiched between the pair of bearings 41 so that it can reciprocate in the Z-axis direction. A space 42h is formed in the inner frame main body 42, allowing the nut 24 to reciprocate in the Z-axis direction. The outer side of the space 42h in the Y-axis direction is closed by the inner frame main body 42, and the inner side in the Y-axis direction is open to the outside of the inner frame main body 42. The upper and lower bearings 41 are fixed to the inner frame main body 42 in a state where they cover the space 42h from above and below.

[0024] The outer frame 50 rotatably guides the pair of inner frames 40 as viewed in the Z-axis direction. The outer frame 50 includes a pair of columns 51 arranged facing the pair of inner frames 40 on the outside in the Y-axis direction, a bed 52 that supports the pair of columns 51 upright and is installed on the floor, and a front member 53 and a rear member 54 that are fixed to the pair of columns 51 and span the front and rear sides thereof, respectively. In this embodiment, the front members 53 are arranged vertically with a gap between them as shown in FIG. 1 , and a front support reciprocating device 13 is fixed to the lower front member 53. A through hole 54h that penetrates in the front-to-rear direction is formed in the rear member 54. The rear tailstock 12 is arranged to pass through this through hole 54h, and the rear support reciprocating device 13 is fixed to the rear member 54.

[0025] The pair of columns 51 rotatably guide the pair of inner frames 40 from the outside in the Y-axis direction and from above and below. Specifically, the columns 51 include an outer guide 56 that rotatably guides the inner frame main body 42 from the outside in the Y-axis direction, and an upper guide 57 and a lower guide 58 that rotatably guide the inner frame main body 42 from above and below.

[0026] As shown in Figure 5, the inner surface of the outer guide 56 in the Y-axis direction has a guide surface 56a at the middle portion in the X-axis direction that is recessed in a semicircular shape when viewed from the Z-axis direction. The guide surface 56a guides the inner frame main body 42 from the outside in the Y-axis direction. In other words, the guide surface 56a rotatably guides the inner frame main body 42. The guide surface 56a receives the load in the Y-axis direction that is generated when machining the workpiece W. The axis 40c around which the inner frame main body 42 rotates is the center of the semicircle of the guide surface 56a when viewed from the Z-axis direction. The axis 40c is parallel to the Z-axis direction.

[0027] 4, the upper guide 57 includes an upper guide base portion 57a ​​disposed directly above the outer guide 56, an upper extension portion 57b extending radially inward from the upper guide base portion 57a ​​with respect to the semicircular guide surface 56a of the outer guide 56, centered on the axis 40c, and an upper guide main body portion 57c extending downward from the upper extension portion 57b. The upper guide main body portion 57c has an arc shape centered on the axis 40c. The lower guide 58 is configured symmetrically to the upper guide 57 and includes a lower guide base portion 58a, a lower extension portion 58b, and a lower guide main body portion 58c.

[0028] The inner frame main body 42 comprises an inner frame core part 43 that is disposed radially inward of the upper guide 57 and the lower guide 58 and is sandwiched between a pair of bearing parts 41, and an inner frame outer core part 44 that protrudes radially outward from the inner frame core part 43 and is guided by a guide surface 56a of the outer guide 56. Guide grooves 44a that are rotatably guided by an upper guide main body part 57c and a lower guide main body part 58c are formed on both the upper and lower surfaces of the inner frame outer core part 44.

[0029] The inner frame main body 42 has a sliding surface 45 along which the sliding base 2 slides, and a recessed portion 46 recessed in the middle of the sliding surface 45 in the X-axis direction, on the inner surface in the Y-axis direction of the inner frame core portion 43. The recessed portion 46 forms the space portion 42h described above. The inner frame main body 42 also has a guided surface 47 on the outer surface in the Y-axis direction of the inner frame outer core portion 44, which is guided by the inner surface in the Y-axis direction (guide surface 56a) of the outer frame 50. When viewed in the Z-axis direction, the guided surface 47 is arc-shaped, and the sliding surface 45 is linear.

[0030] As shown in Figure 5, the rotating and tilting device 60 rotates the inner frame 40 within a certain angular range from the outside of the outer frame 50 when viewed from the Z-axis direction. The rotating and tilting device 60 converts linear reciprocating motion into rotational motion of the inner frame 40. Specifically, the rotating and tilting device 60 includes an arm 61 that extends from the outside of the outer frame 50 toward the inner frame 40 when viewed from the Z-axis direction and rotates the inner frame 40, and a swinging mechanism 62 that swings the arm 61 around the inner frame 40.

[0031] A through hole 50h for passing the arm 61 from the outside to the inside of the outer frame 50 is formed in the outer frame 50. The through hole 50h passes through the outer guide 56 in the Y-axis direction.

[0032] The swing mechanism 62 includes a servo motor 63 as a motor, a driving shaft 64 rotated by the servo motor 63 , and a conversion mechanism 65 that converts the rotational motion of the driving shaft 64 into swinging motion of the arm 61 .

[0033] A case 63a is fixed to the servo motor 63. The case 63a is fixed to the outer frame 50 via a bracket 63b. The rotating shaft of the servo motor 63 protrudes into the inside of the case 63a and is connected to one end of a driving shaft 64 inside the case 63a. The driving shaft 64 extends in a straight line in the X-axis direction. One end of the driving shaft 64 is rotatably supported inside the case 63a via a bearing portion 63c.

[0034] The conversion mechanism 65 includes a male screw 64a formed on the other end (tip) of the driving shaft 64, a nut portion 66 that fits onto the male screw 64a, and a support box 67 that supports the nut portion 66 and is fixed to the tip of the arm 61.

[0035] The support box 67 is penetrated in the X-axis direction. The support box 67 is rectangular when viewed in the X-axis direction and is composed of an upper plate 67a and a lower plate 67b that face each other vertically, and a pair of side plates 67c that face each other laterally. One of the side plates 67c is fixed to the arm 61.

[0036] The nut portion 66 comprises a nut portion main body 66b that is circular when viewed from the Z-axis direction, a shaft portion 66c that protrudes from the top and bottom at the center of the circle of the nut portion main body 66b, and a pair of stop plates 66d that protrude radially from the upper end of the upper shaft portion 66c and the lower end of the lower shaft portion 66c.

[0037] The nut body 66b is disk-shaped, and a screw hole 66a is formed in the nut body 66b so as to penetrate in the X-axis direction through the center of the disk-shaped circle when viewed from the Z-axis direction.

[0038] The pair of stop plates 66d are separately disposed on the upper and lower sides of the support box 67. The pair of shaft portions 66c appear to be in close contact with the upper plate 67a and the lower plate 67b in the drawing, but in reality there is a gap between them as they pass through. The nut portion main body 66b also appears to be in close contact with the support box 67 in the drawing in all directions, but in reality there is a gap between them as they are housed therein. When the driving shaft 64 rotates, the nut portion 66 uses these gaps to displace together with the support box 67 in the X-axis direction in accordance with the amount of rotation of the male screw 64a, rotating the inner frame 40 by an angle corresponding to the amount of displacement.

[0039] In this embodiment, the rotating and tilting device 60 is connected to the guided surface 47 of each inner frame 40 at a middle portion in the Z-axis direction. A plurality of first stopping devices 70 are provided to stop each inner frame 40 so that it cannot rotate. As shown in FIGS. 1 to 3 , four first stopping devices 70 are provided for one inner frame 40. The four first stopping devices 70 are provided at positions spaced apart in the X-axis direction on both sides of each rotating and tilting device 60 in the Z-axis direction. In this embodiment, the first stopping devices 70 are clamping devices 70 that clamp the inner frame 40 from the radial direction of the inner frame 40. That is, the first stopping devices 70 apply a stopping force to the inner frame 40 in the radial direction. As shown in FIG. 6 , the clamping device 70 includes a fluid pressure cylinder 71 fixed to the outer frame 50 and a brake shoe 73 fixed to the tip of a piston rod 72 of the fluid pressure cylinder 71 and that stops the inner frame main body 42 so that it cannot rotate. An accommodation hole 51h for accommodating the fluid pressure cylinder 71 is formed in the column 51 of the outer frame 50. The accommodation hole 51h penetrates from the outside to the inside of the column 51 when viewed in the Z-axis direction.

[0040] A groove 48 for accommodating the tip of the piston rod 72 and the brake shoe 73 is formed along the circumferential direction of the arc on the outer peripheral surface of the inner frame main body 42. As shown in FIG. 4 , the groove 48 opens radially outward. Furthermore, the opening width in the Z-axis direction of the outer peripheral surface of the inner frame main body 42 is narrower at the inlet of the groove 48 than at the rear. The portions located above and below the inlet of the groove 48 are the portions where the inlet of the groove 48 is narrower than the rear, and are brake drums 49 against which the brake shoe 73 can be pressed. In this embodiment, a pair of brake drums 49 are disposed opposite each other above and below the inlet of the groove 48. The brake drums 49 are arc-shaped when viewed from the Z-axis direction, as shown in FIG. 6 . The tip surface of the fluid pressure cylinder 71 faces the brake drum 49 and is formed in an arc shape concentric with the brake drum 49 when viewed from the Z-axis direction. In the drawing, the tip end surface of the fluid pressure cylinder 71 and the inner peripheral surface (guide surface 56a) of the outer frame 50 are continuous in an arc shape.

[0041] As shown in FIG. 6, in this embodiment, the fluid pressure cylinder 71 is equipped with a return spring 74. The return spring 74 constantly exerts a force that pulls the brake shoe 73 toward the fluid pressure cylinder 71. The fluid pressure cylinder 71 is double-acting. As shown in FIG. 6(A), when fluid is not actively supplied to the fluid pressure cylinder 71, the restoring force of the return spring 74 acts, pressing the brake shoe 73 against the brake drum 49 of the inner frame main body 42 and pressing the inner frame 40 toward the inner circumferential surface (guide surface 56a) of the outer frame 50 and the tip surface of the fluid pressure cylinder 71. This clamps the inner frame 40 and stops it from rotating. To firmly stop the inner frame 40 from rotating, fluid is supplied to the fluid pressure cylinder 71 in the direction that the return spring 74 extends. On the other hand, when the inner frame 40 is unclamped and held rotatably as shown in FIG. 6(B), fluid is supplied to the fluid pressure cylinder 71 in the direction in which the return spring 74 contracts.

[0042] The second stopping devices 80 are separately installed on the inside of the pair of inner frames 40 in the Y-axis direction. In this embodiment, as seen from the Z-axis direction as shown in Figures 3, 5, and 6, two fluid pressure cylinders as the second stopping devices 80 are separately fixed to the rear member 54 and lined up in the Y-axis direction. The fluid pressure cylinders 80 advance a piston rod 81 so that it can collide with the inner frame 40, and retract the piston rod 81 so that it can rotatably hold the inner frame 40.

[0043] The fluid pressure cylinder 80 prevents the inner frame 40 from rotating due to the large force applied to the inner frame 40 during machining of the workpiece W, which is caused by the stopping force of the first stopping device 70 alone. Specifically, the workpiece W is machined by the pair of dies 1 at a position spaced apart in the X-axis direction from the line connecting the axes 40c of the pair of inner frames 40. As a result, a rotational force is generated in the inner frame 40 about the axis 40c during machining. Even if this rotational force is generated, if the stopping force generated by the first stopping device 70 does not cause the inner frame 40 to rotate, there is no need to drive the second stopping device 80. However, if there is a risk that the inner frame 40 will rotate during machining due to the stopping force of the first stopping device 70 alone, the second stopping device 80 is driven in advance before machining to cause the piston rod 81 of the second stopping device 80 to collide with the pair of inner frames 40, thereby applying a stopping force to the pair of inner frames 40 in the direction opposite to the rotational force generated during machining of the workpiece W. In this way, the second stopping device 80 receives the pair of inner frames 40 from the direction of rotation when the pair of inner frames 40 are about to rotate during processing of the workpiece W, thereby stopping the rotation of the pair of inner frames 40 and enabling the workpiece W to be processed stably.

[0044] In the rolling machine of the first embodiment described above, by rotating the inner frame 40 with the rotating and tilting device 60, the slider 2 and the die 1 rotate together with the inner frame 40, and the die 1 is changed from its basic position to an inclined position, making it easy to change the direction in which the machining surface of the die 1 faces. Furthermore, in the rolling machine of the first embodiment, even if the first stopping device 70 is not actively driven, the restoring force of the return spring 74 stops the inner frame 40 so that it cannot rotate.

[0045] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the invention.

[0046] For example, the rolling machine is vertical in the above embodiment, but it may be horizontal. In this case, if the first axis direction in the present invention is the X-axis direction, the second axis direction in the present invention is the Z-axis direction, and the third axis direction in the present invention is the Y-axis direction.

[0047] Furthermore, in this embodiment, a double-acting fluid pressure cylinder 71 with a return spring 74 is used as part of the first stopping device 70, but the present invention is not limited to this, and the first stopping device 70 may be a double-acting fluid pressure cylinder without a return spring 74, a single-acting cylinder with a return spring 74, or another mechanism may be used. Note that when the first stopping device 70 is a single-acting fluid pressure cylinder with a return spring 74, for example, a force for clamping the inner frame 40 is generated solely by the restoring force of the return spring 74, and in order to release this clamping force, fluid is supplied into the single-acting cylinder to compress the return spring 74.

[0048] In the above embodiment, the rolling machine is provided with dedicated stopping devices 70, 80 separate from the rotating and tilting device 60, but the present invention is not limited to this, and the rotating and tilting device 60 may also serve as the stopping device. In other words, the rotating and tilting device 60 rotates the inner frame 40 when changing the die 1 to the basic position or the tilted position. If the rotating and tilting device 60 is configured to firmly hold the inner frame 40, the rotational force of the inner frame 40 generated when the workpiece W is machined can be suppressed by the rotating and tilting device 60.

[0049] Furthermore, in the above embodiment, when the first stop device 70 clamps the inner frame 40, the outer peripheral surface (guided surface 47) of the inner frame 40 abuts against the guide surface 56a of the outer frame 50 and the tip surface of the fluid pressure cylinder 71. However, the present invention is not limited to this. For example, when the inner frame 40 is clamped, the inner frame 40 may abut only against the tip surface of the fluid pressure cylinder 71, leaving a small gap between the guided surface 47 of the inner frame 40 and the guide surface 56a of the outer frame 50, or conversely, the guided surface 47 of the inner frame 40 may abut only against the guide surface 56a of the outer frame 50, leaving a small gap between the tip surface of the fluid pressure cylinder 71 and the inner frame 40. [Explanation of symbols]

[0050] 1 die 2 Slide 3 Holder 4 spacers 5 Positioning material double work 10 Support device 11 Center 12 Tailstock 13 Support reciprocating device 20 Reciprocating device for processing 21 Ball screw 22 Motor 23 Screw shaft 24 Nut 30 frames 40 Inner Frame 40c axis 41 Bearing section 42 Inner frame body 42h space part 43 Inner frame core 44 Inner frame outer core 44a Guide groove 45 sliding surface 46 Recess 47 Guided surface 48 Groove 49 Brake drum 50 outer frame 50h through hole 51 Column 51h Storage hole 52 beds 53 Pre-material 54 Back material 54h through hole 56 Outer guide 56a Guide surface 57 Upper guide 57a Upper guide base 57b Upper overhang 57c Upper guide body 58 Lower guide 58a Lower guide base 58b Lower overhang 58c Lower guide body 60 Rotating and tilting device 61 Arm 62 Swing mechanism 63 Servo motor 63a Case 63b Bracket 63c bearing part 64 Driving Axis 64a male thread 65 Conversion mechanism 66 Nut part 66a screw hole 66b Nut body 66c shaft part 66d stop plate 67 Support Box 67a Upper board 67b Lower plate 67c side plate 70 First stopping device (clamping device) 71 Fluid pressure cylinder 72 Piston rod 73 Brake shoe 74 Return spring 80 Second stopping device (fluid pressure cylinder) 81 Piston rod

Claims

1. a support device that supports the workpiece rotatably about a first axis direction among a first axis direction, a second axis direction, and a third axis direction that are perpendicular to each other; a pair of dies that sandwich the work supported by the support device in the second axial direction; a pair of slides to which the pair of dies are separately fixed and which face each other in the second axial direction; a pair of reciprocating processing devices that perform linear reciprocating motion of the pair of sliders together with the pair of dies in a third axis direction to process the workpiece; a pair of inner frames that guide the pair of sliders separately in a slidable manner in the third axis direction and face each other in the second axis direction; an outer frame that is disposed outside a pair of inner frames that face each other when viewed from a third axis direction and that rotatably guides the pair of inner frames; A rolling machine characterized by having a pair of rotating and tilting devices that can rotate a pair of inner frames separately, so that the die can be changed between the basic position and the inclined position, where the basic position of the die is the position in which the machining surface of the die faces the second axis direction when viewed from the third axis direction, and the inclined position of the die is the position in which the machining surface faces a direction inclined with respect to the second axis direction.

2. 2. The rolling machine according to claim 1, further comprising a stopping device for stopping the pair of inner frames so that they cannot rotate separately.

3. A rolling machine as described in claim 2, characterized in that the stopping device includes a first stopping device that applies a stopping force to the inner frame in its radial direction, and a second stopping device that applies a stopping force to the pair of inner frames in the opposite direction to the rotational force generated in the pair of inner frames when the workpiece is processed.

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