JP5741953B2 - Punching device - Google Patents

Description

  The present invention relates to a punching apparatus.

  2. Description of the Related Art There is known a press working apparatus in which a workpiece is placed on a lower mold fixed to a base and a slider is lowered so as to press the upper mold against the workpiece to perform bending or shearing. The press working apparatus disclosed in Patent Document 1 includes a plurality of working portions arranged in the feeding direction of a strip as a workpiece. The strip is sent intermittently. The processing section operates once every time the strip is fed. Each processing unit operates with a time interval so that the timing of pressing the upper die against the band plate is different from each other.

JP 2007-229738 A

In the press working apparatus disclosed in Patent Document 1, when a plurality of through holes arranged in the circumferential direction are formed in one working part, it is necessary to have a working ability to simultaneously punch out each through hole. Therefore, there has been a problem that the apparatus becomes large. In addition, since the total amount of the drawing load of each through hole acts on the processed portion at the same time, there is a problem that the durability of the apparatus is low.
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a punching apparatus that can be reduced in size and can improve durability.

According to a first aspect of the present invention, there is provided a punching apparatus including a rotation driving unit, a rotating body, a punching die, a plurality of punching punches, a plurality of driven cams, and a plurality of driving cams. The rotation driving unit rotatably supports the rotating body and rotationally drives the rotating body.
The punching die has a plurality of die holes that are separated from the rotating body in the direction of the rotational axis of the rotating body and are arranged in the rotating direction of the rotating body.

  The punching punch is located between the punching die and the rotating body, and can approach and separate from the punching die. When the punching punch moves to the punching die side, one end of the punching die side is inserted into the die hole. The punches are arranged so as to be aligned in the rotation direction.

  The driven cam is located between the punch and the rotating body, and can reciprocate in a direction approaching and separating from the punch die. When the driven cam moves to the punching die side, it pushes the punching punch toward the punching die side. The driven cams are arranged so as to be aligned in the rotation direction.

  Each drive cam is located between the driven cam and the rotating body, and is provided at equal intervals in the rotation direction. The drive cam can move integrally with the rotating body, and when the rotating body rotates, the plurality of driven cams are sequentially pressed toward the punching punch, and are aligned with the workpiece between the punching punch and the punching die in the rotational direction. A plurality of through holes are opened sequentially.

  Therefore, when a plurality of through holes arranged in the circumferential direction are formed in the workpiece, each punch is pressed against the workpiece with a time difference. Therefore, the punching device does not need a processing capability for punching all through holes simultaneously. Therefore, the processing capability can be reduced, and the apparatus can be reduced in size.

  In addition, the punching load of each through hole acts on the punching device in order, not the punching load of all the through holes simultaneously. Therefore, the maximum punching load acting on the punching device can be reduced, and the durability of the device can be improved.

  Further, since the drive cams are provided at equal intervals in the rotation direction, the application points of the load acting on the rotating body from the drive cam are positioned at equal intervals in the rotation direction. Therefore, the load applied to the rotating body can be balanced, and the tilting of the rotating body can be suppressed, and the durability of the pressurizing mechanism including the driving cam and the driven cam is improved. Further, since the uneven load on the punch that slides up and down is reduced, the durability of the punch can be improved.

  In this specification, “one-time operation of the punching device” refers to an operation each time a workpiece is sent. The punching device of the present invention operates once each time a workpiece is fed, and a plurality of holes are formed by the one operation.

It is a figure which shows the punching apparatus and unwinding apparatus by 1st Embodiment of this invention. It is a top view of the metal strip immediately after the 1st process part-3rd process part of the punching apparatus of FIG. It is a top view of the metal strip immediately after the 3rd process part-the 4th process part of the punching apparatus of FIG. It is a figure which shows the punching apparatus of FIG. 1, Comprising: The upper mold | type has shown the state raised. It is a figure which shows the punching apparatus of FIG. 1, Comprising: The state which the upper mold | type is falling is shown. It is a perspective view which shows the upper type rotary body of a punching apparatus of FIG. 1, a punch, a driven cam, and a drive cam. FIG. 7 is a perspective view showing a punch, a driven cam, and a driving cam of FIG. 6. It is a figure which shows the action | operation of the punching punch of FIG. 6, a driven cam, and a driving cam, Comprising: The state which a driving cam begins to press a driven cam is shown. It is a figure which shows the action | operation of the punching punch of FIG. 6, a driven cam, and a driving cam, Comprising: The state immediately after finishing a driving cam pressing a driven cam is shown. It is a figure which shows the action | operation of the punching punch of FIG. 6, a driven cam, and a driving cam, Comprising: The state which the control part of the driving cam has controlled that a driven cam pulls out from a through-hole. It is a figure which shows the action | operation of the punching punch of FIG. 6, a driven cam, and a driving cam, Comprising: The state by which the restriction | limiting of the driven cam by a driving cam was cancelled | released is shown. It is a top view which shows the metal strip immediately before the 2nd process part of the punching apparatus of FIG. 1 starts a punching process with a drive cam. It is a top view which shows the metal strip in the middle of the 2nd process part of the punching apparatus of FIG. It is a top view which shows the metal strip immediately after the 2nd process part of the punching apparatus of FIG. 1 performed punching with a drive cam. It is a perspective view which shows the to-be-driven cam, parallel running cam, and drive cam of the punching apparatus by 2nd Embodiment of this invention. It is a perspective view which shows the state which the parallel running cam and the drive cam rotated in the rotation direction from the state of FIG. It is a perspective view which shows the state which the parallel running cam and the drive cam rotated in the rotation direction from the state of FIG. It is a perspective view which shows the state which the parallel running cam and the drive cam rotated in the rotation direction from the state of FIG. It is a perspective view which shows the state which the parallel running cam and the drive cam rotated in the rotation direction from the state of FIG. FIG. 20 is a perspective view illustrating a state in which the parallel cam and the drive cam are rotated in the rotation direction from the state of FIG. 19. It is a figure which shows the idle running area of the drive cam of the punching apparatus by 3rd Embodiment of this invention. It is a perspective view which shows the punching apparatus by 4th Embodiment of this invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted.
(First embodiment)
A punching apparatus according to a first embodiment of the present invention is shown in FIG. The punching device 20 is a device that punches the metal strip 10. The metal strip 10 as the “work material” is unwound by the unwinding device 19 from the coiled state and supplied to the punching device 20.

  The first processing unit 21 of the punching device 20 in FIG. 1 opens a plurality of through holes 12 in the metal strip 10 as shown in FIG. Further, as shown in FIG. 2, the second processing portion 22 of the punching device 20 of FIG. 1 opens a large number of through holes 13 arranged in the circumferential direction inside each through hole 12 in the metal strip 10. Moreover, the 3rd process part 23 of the punching apparatus 20 of FIG. 1 makes the through-hole 14 connected to the inner diameter end of each through-hole 13 in the metal strip 10 as shown in FIG. Moreover, the 4th process part 24 of the punching apparatus 20 of FIG. 1 makes the through-hole 15 in the metal strip 10 as shown in FIG. When the through hole 15 is opened, the central portion of the metal strip 10 including the through holes 12 to 14 is punched out. The punched member is used as a laminated plate constituting the stator core of the motor.

  First, the configuration of the punching device 20 will be described with reference to FIGS. 1, 4 and 5. The punching device 20 includes a base 28, a frame 29, a mold 30, a feeding device 61, a drive motor 62, a drive shaft 63, a preliminary operation mechanism 64, and a rotation transmission mechanism 72. The drive motor 62, the drive shaft 63, and the rotation transmission mechanism 72 constitute a “rotation drive unit” recited in the claims.

  The mold 30 includes a lower mold 31, an upper mold 40 and an urging means 60. The lower mold 31 is fixed to the upper surface of the base 28. The lower mold 31 has punch dies 36 to 39. The punching dies 36 to 39 have die holes 32 to 35 at positions corresponding to the through holes 12 to 15 in FIG. 2.

  The upper die 40 is located above the lower die 31 and is provided so as to be able to approach and separate from the lower die 31. The upper die 40 has punches 42 to 45 at positions corresponding to the through holes 12 to 15 in FIG. The punching punches 42 to 45 are pressed downward and pressed against the metal strip 10, thereby opening the through holes 12 to 15 in the metal strip 10. The upper mold 40 will be described in detail later.

  The urging means 60 is provided between the upper mold 40 and the lower mold 31 and constantly urges the upper mold 40 upward. The upper die 40 is lifted up by the urging force of the urging means 60 except when the preliminary operation mechanism 64 described later in detail presses the upper die 40 downward. The metal strip 10 is inserted between the upper mold 40 and the lower mold 31.

The feeding device 61 feeds the metal strip 10 supplied from the unwinding device 19 to the mold 30 side.
The drive shaft 63 extends in the vertical direction and is rotatably supported by the base 28.
The drive motor 62 is connected to the drive shaft 63 and can drive the drive shaft 63 to rotate.

  The preliminary operation mechanism 64 performs a preliminary operation before the metal strip 10 is punched. The preliminary operation is an operation of lowering the upper mold 40 from the position shown in FIG. 3 and sandwiching the metal strip 10 between the upper mold 40 and the lower mold 31 as shown in FIG. Specifically, the preliminary operation mechanism 64 includes a first lowering cam 65, a second lowering cam 67, a pair of pulleys 69 and 70, and a timing belt 71.

  The first lowering cam 65 has a vertical axis and is rotatably supported by the top plate of the frame 29. As shown in FIG. 1, the first lowering cam 65 has a protrusion 66 extending in the width direction of the punching device 20 when the upper mold 40 is not lowered.

The second lowering cam 67 is positioned below the first lowering cam 65 and is fixed to the upper mold 40. The second descending cam 67 has a groove 68 into which the projection 66 of the first descending cam 65 can be fitted.
When the projection 66 of the first lowering cam 65 is fitted in the groove 68 of the second lowering cam 67, the upper mold 40 is allowed to move upward. Further, the protrusion 66 of the first lowering cam 65 causes the second lowering cam 67 to move downward when the first lowering cam 65 rotates so that the protrusion 66 intersects the groove 68 of the second lowering cam 67. The upper die 40 is lowered by pressing.

  The pulley 69 is formed integrally with the drive shaft 63. The pulley 70 is formed integrally with the first lowering cam 65. The timing belt 71 is wound around the pulley 69 and the pulley 70 and transmits the rotation of the drive shaft 63 to the first lowering cam 65. The rotation of the drive shaft 63 is transmitted to the first lowering cam 65 only when a clutch (not shown) is engaged.

  The rotation transmission mechanism 72 includes a pair of pulleys 73 and 74 and a timing belt 75. The pulley 73 is formed integrally with the drive shaft 63. The pulley 74 is integrally formed with the rotating body 50 constituting the mold 30. The timing belt 75 is wound around the pulley 73 and the pulley 74, and transmits the rotation of the drive shaft 63 to the rotating body 50 of the mold 30. The rotation of the drive shaft 63 is transmitted to the rotating body 50 only when a clutch (not shown) is engaged.

Next, the upper mold 40 will be described in detail with reference to FIGS. Here, the 2nd process part 22 is demonstrated on behalf of the 1st process part 21-the 4th process part 24. FIG.
The second machining section 22 of the upper mold 40 includes a rotating body 50, a plurality of punching punches 43, a plurality of urging means 53, a plurality of driven cams 54, and two driving cams 56.

  The rotating body 50 includes a shaft portion 51 that extends in the vertical direction and is rotatably supported, and a disk portion 52 that is formed integrally with a lower end portion of the shaft portion 51. The punching die 37 is spaced apart from the rotating body 50 in the rotational axis direction of the rotating body 50. The plurality of die holes 33 of the punching die 37 are formed so as to be arranged at equal intervals in the rotation direction of the rotating body 50.

  The punching punch 43 is located between the punching die 37 and the rotating body 50 and can reciprocate in a direction approaching and separating from the punching die 37. The punching punch 43 can be inserted into the die hole 33 at one end on the punching die 37 side. The punches 43 are arranged so as to be aligned in the rotation direction of the rotating body 50.

  The biasing means 53 constantly biases the punching punch 43 upward. The punching punch 43 is lifted up by the urging force of the urging means 53 except when the driving cam 56 described later in detail presses the punching punch 43 downward.

  The driven cam 54 is located between the punching punch 43 and the rotating body 50 and above the punching punch 43. The driven cam 54 reciprocates in the direction approaching and separating from the lower die 31 and can press the punching punch 43 toward the lower die 31. The upper surface of the driven cam 54 is an inclined surface 55 that is positioned closer to the rotating body 50 toward the front in the rotational direction. The driven cams 54 are arranged in the rotation direction of the rotating body 50.

The drive cam 56 is located between the driven cam 54 and the rotating body 50 and above the driven cam 54. The drive cams 56 are provided at equal intervals in the rotational direction. The drive cam 56 can move integrally with the rotating body 50.
The drive cam 56 is arranged so that the front punching punch 43 in the rotational direction is inserted into the die hole 33 before the punching punch 43 rearward in the rotational direction out of the two punching punches 43 adjacent to each other. The driven cam 54 is pressed.

  Specifically, the drive cam 56 has a pressing portion 57 and a restricting portion 59. As shown in FIG. 8, the pressing portion 57 is moved so as to move from the initial position where the punching punch 43 is located closest to the rotating body 50 to the insertion position where it is inserted into the die hole 33 as shown in FIG. The drive cam 54 is pressed. The lower surface of the pressing portion 57 is an inclined surface 58 that is positioned closer to the rotating body 50 toward the front in the rotation direction. The inclined surface 58 can push the driven cam 54 toward the die 37 while sliding on the inclined surface 55 of the driven cam 54.

The restricting portion 59 extends from the pressing portion 57 to the rear side in the rotational direction, and as shown in FIG. 10, the front punching punch 43 in the rotational direction among the two punching punches 43 adjacent to each other moves to the insertion position. Until the pressing portion 57 presses the driven cam 54, the rearward punching punch 43 in the rotational direction is restricted from coming out of the through hole 13.
The drive cam 56 is provided across two driven cams 54 adjacent to each other.

  When the rotating body 50 rotates, the driving cam 56 moves integrally with the rotating body 50 and sequentially presses the plurality of driven cams 54 toward the punching punch 43 side. The punching punch 43 is sequentially pressed against the metal strip 10 by the driven cam 54 and sequentially opens a large number of through holes 13 arranged in the rotation direction.

Next, the operation of the punching device 20 will be described with reference to FIGS. 3, 4, and 8 to 14.
When the projection 66 of the first descending cam 65 is engaged with the groove 68 of the second descending cam 67 as shown in FIG. 3, the first descending cam 65 rotates 90 degrees as shown in FIG. The second lowering cam 67 is pressed downward by the projection 66 of the first lowering cam 65. As a result, the upper mold 40 is lowered.

  Subsequently, when the rotation of the drive motor 62 is transmitted to the rotating body 50 via the drive shaft 63 and the rotation transmission mechanism 72, the drive cam 56 moves in the rotation direction as shown in FIGS. When the drive cam 56 moves in the rotational direction, each driven cam 54 is sequentially pressed toward the die 37 side.

  When the rotating body 50 rotates, the drive cam 56 rotates in the rotational direction from the start position shown in FIG. 12 and sequentially presses each punch to the metal strip 10. When each punch is pressed against the metal strip 10 sequentially, a large number of through holes 13 arranged in the rotation direction in the metal strip 10 are sequentially opened as shown in FIGS.

  As described above, the upper die 40 of the punching device 20 according to the first embodiment has the rotating body 50, the plurality of punches 43, the plurality of driven cams 54, and the two drive cams 56. When the driven cam 54 moves to the punching die 37 side, it pushes the punching punch 43 toward the punching die 37 side.

  When the rotating body 50 rotates, the driving cam 56 moves integrally with the rotating body 50, and sequentially presses the plurality of driven cams 54 toward the punching punch 43, so that the metal strip between the punching punch 43 and the punching die 37 is moved. A large number of through-holes 13 arranged in the rotation direction in the plate 10 are sequentially opened.

  Therefore, when many through-holes 13 arranged in the circumferential direction are formed in the metal strip 10, each punch 43 is pressed against the metal strip 10 with a time difference. For this reason, the punching device 20 does not need the processing capability of punching all the through holes 13 simultaneously. Therefore, the processing capability can be reduced and the apparatus can be miniaturized.

  In addition, the punching load of each through-hole 13 acts on the punching device 20 in order, not the punching loads of all the through-holes 13 simultaneously. Therefore, the maximum punching load acting on the punching device 20 can be reduced, and the durability of the mold 30 and the drive unit can be improved.

  In the first embodiment, since the drive cams 56 are provided at equal intervals in the rotation direction, the application points of the load acting on the rotating body 50 from the drive cam 56 are positioned at equal intervals in the rotation direction. Therefore, the load applied to the rotating body 50 is balanced, and the tilting of the rotating body 50 can be suppressed, and the durability of the pressurizing mechanism including the driving cam 56 and the driven cam 54 is improved. Moreover, since the uneven load to the punching punch 43 that slides up and down is reduced, the durability of the punching punch 43 can be improved.

Further, in the first embodiment, the drive cam 56 is configured such that the front punching punch 43 in the rotational direction is the die hole before the rearward punching punch 43 in the rotational direction out of the two punching punches 43 adjacent to each other. The driven cam 54 is pressed so as to be inserted into the cam 33.
Therefore, when the metal strip 10 is punched with the punching punch 43, deformation of the rear through hole 13 in the rotational direction can be suppressed, and hole accuracy can be ensured.

(Second Embodiment)
The upper mold | type of the punching apparatus by 2nd Embodiment of this invention is demonstrated based on FIGS. 15-20. The upper mold 80 includes a plurality of driven cams 81, two parallel cams 85, and two drive cams 86. The punching punch and the rotating body have the same configuration as in the first embodiment.

The driven cam 81 includes a first cam portion 82 positioned in the radially inward direction and a second cam portion 83 positioned in the radially outward direction. The first cam portion 82 has the same configuration as the driven cam 54 of the first embodiment.
The second cam portion 83 has an inclined surface 84 that protrudes upward from the first cam portion 82 and has a smaller inclination angle than the inclined surface 58 of the first cam portion 82. The driven cams 81 are arranged so as to be aligned in the rotation direction.

  The parallel running cam 85 is located between the second cam portion 83 of the driven cam 81 and the rotating body, and is located forward of the driving cam 56 in the rotational direction. The two parallel cams 85 are provided at equal intervals in the rotation direction. The parallel cam 85 moves integrally with the rotating body when the rotating body rotates.

  When the position immediately before the punching punch comes into contact with the metal strip is defined as a predetermined position, the parallel cam 85 presses the second cam portion 83 of the driven cam 81 so that the punching punch moves from the initial position to the predetermined position. To do. The parallel cam 85 maintains the position of the driven cam 81 at the predetermined position until the driving cam 86 is engaged with the driven cam 81.

  The drive cam 86 has a pressing portion 87 and a restricting portion 88. The pressing portion 87 presses the first cam portion 82 of the driven cam 81 so that the punch punch moved to the predetermined position by the parallel cam 85 moves from the predetermined position to the insertion position.

  The restricting portion 88 extends from the pressing portion 87 to the rear side in the rotation direction. The restricting portion 88 is a rear punch in the rotational direction until the pressing portion 87 presses the driven cam 81 so that the front punch in the rotational direction of two adjacent punches moves to the insertion position. Is controlled from coming out of the through hole of the metal strip.

  In the upper mold 80 configured as described above, when the parallel cam 85 and the drive cam 86 move in the rotation direction as shown in order from FIG. 15 to FIG. 20, the parallel cam 85 and the drive cam 86 are each driven cam 81. Are sequentially pressed to the punch side. The punching punch is sequentially pressed against the metal strip by the driven cam 81 to sequentially open a plurality of through holes arranged in the rotation direction.

  The second embodiment has the same effects as the first embodiment. Furthermore, in the second embodiment, a parallel cam 85 and a drive cam 86 are provided. The parallel cam 85 moves the punch punch from the initial position to the predetermined position, and the drive cam 86 moves the punch punch from the predetermined position to the insertion position.

  Therefore, the drive cam 86 can press the punch to the metal strip immediately after the driven cam 81 starts to be pressed. Therefore, as shown in FIG. 19, when a pulling load is applied to the drive cam 86, the contact area between the driven cam 81 and the drive cam 86 can be increased. Therefore, the surface pressure of the driving cam 86 and the driven cam 81 can be greatly reduced, and the durability of the driving cam 86 and the driven cam 81 can be improved.

(Third embodiment)
The upper mold | type of the punching apparatus by 3rd Embodiment of this invention is demonstrated based on FIG. A part of the section in which the drive cam 91 of the upper mold 90 rotates in the rotation direction is an idle running section in which the drive cam 91 does not press the driven cam 54.

The drive cam 91 indicated by a two-dot chain line in FIG. 21 is in a state immediately after the engagement with the driven cam 54 at the rear in the rotational direction among the driven cams 54 adjacent to each other. A driving cam 91 shown by a solid line in FIG. 21 is in a state immediately after the engagement with the driven cam 54 in the front in the rotational direction is started. A section moving from the two-dot chain line state to the solid line state in FIG. 21 is an idle running section.
According to the third embodiment, even if the drive cam 91 rotates by inertia when all the through holes 13 have been processed, the punching punch 43 is inserted into the through holes 13 again within the idle running section. It can be avoided.

(Fourth embodiment)
A punching apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. The punching apparatus 100 lowers the upper mold 40 and rotates the rotating body 50 by a power source for the press operation of the press machine.
According to 4th Embodiment, there exists an effect similar to 1st Embodiment.

(Other embodiments)
In another embodiment of the present invention, three or more drive cams may be provided.
In another embodiment of the present invention, one driven cam may be provided corresponding to one punch, or one driven cam may be provided corresponding to a plurality of punches.
In another embodiment of the present invention, a through hole may be formed in another workpiece instead of the metal strip.

In another embodiment of the present invention, various shapes can be considered for the shape of the through hole opened in the metal strip.
In other embodiment of this invention, the member pierced from the metal strip may be used for uses other than the stator of a motor.
In another embodiment of the present invention, the drive cam may be composed of, for example, a roller instead of a protrusion.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

10 ... Metal strip (work material)
DESCRIPTION OF SYMBOLS 13 ... Through-hole 20,100 ... Punching device 37 ... Punching die 33 ... Die hole 43 ... Punching punch 50 ... Rotating body 54, 81 ... Driven cam 56, 86... Drive cam 62... Drive motor (rotation drive unit)

Claims (7)

A rotational drive unit (62) capable of outputting rotational force;
A rotating body (50) that is rotatably supported by the rotation driving unit and rotates by a rotational force output from the rotation driving unit;
A punching die (37) having a plurality of die holes (33) spaced apart from the rotating body in the rotational axis direction of the rotating body and arranged in the rotational direction of the rotating body;
It is located between the punching die and the rotating body, and can approach and separate from the punching die, and when moved to the punching die side, one end of the punching die side is inserted into the die hole, and in the rotation direction A plurality of punches (43) lined up;
The punch is located between the punch and the rotary body, and can be reciprocated in a direction approaching and separating from the punch die. When the punch is moved to the punch die side, the punch punch is pressed toward the punch die and rotated. A plurality of driven cams (54, 81) arranged in a direction;
Positioned between the driven cam and the rotating body, provided at equal intervals in the rotation direction, movable together with the rotating body, and when the rotating body rotates, a plurality of the driven cams are sequentially A plurality of drive cams (56, 86) that press against the punching punch side and sequentially open a plurality of through-holes (13) arranged in the rotational direction in the workpiece (10) between the punching punch and the punching die;
A punching device (20, 100) comprising:   The drive cam is arranged so that a punching punch forward in the rotational direction is inserted into the die hole before a punching punch behind in the rotational direction out of the two punching punches adjacent to each other. The punching device according to claim 1, wherein the driving cam is pressed. The initial position is the position closest to the rotating body of the punching punch,
The position immediately before the punching punch comes into contact with the workpiece is a predetermined position,
When the position where the punch is inserted into the die hole is an insertion position,
It is located between the driven cam (81) and the rotating body and is located in front of the driving cam (86) in the rotational direction, provided at equal intervals in the rotational direction, and integrated with the rotating body. A parallel cam (85) that is movable, and that presses the driven cam so that the punching punch moves from the initial position to the predetermined position when the rotating body rotates;
The drive cam is
A pressing portion (87) for pressing the driven cam so that the punching punch moved to the predetermined position by the parallel cam moves from the predetermined position to the insertion position;
Until the pressing portion presses the driven cam so that the punching punch forward in the rotating direction among the two punching punches adjacent to each other extends from the pressing portion to the rear side in the rotational direction moves to the insertion position. A restricting portion (88) for restricting the punching punch behind in the rotational direction from coming out of the through hole;
The punching apparatus according to claim 2, comprising: The initial position is the position closest to the rotating body of the punching punch,
When the position where the punch is inserted into the die hole is an insertion position,
The drive cam (56)
A pressing portion (57) for pressing the driven cam (54) so that the punching punch moves from the initial position to the insertion position;
Until the pressing portion presses the driven cam so that the punching punch forward in the rotating direction among the two punching punches adjacent to each other extends from the pressing portion to the rear side in the rotational direction moves to the insertion position. A restricting portion (59) for restricting the punching punch behind in the rotational direction from coming out of the through hole;
The punching device (20) according to claim 2, characterized in that The initial position is the position closest to the rotating body of the punching punch,
The position immediately before the punching punch comes into contact with the workpiece is a predetermined position,
When the position where the punch is inserted into the die hole is an insertion position,
Located between the driven cam and the rotating body and forward of the driving cam in the rotational direction, provided at equal intervals in the rotational direction, and movable integrally with the rotating body, A parallel cam that presses the driven cam so that the punching punch moves from the initial position to the predetermined position when the rotating body rotates;
2. The driving cam presses the driven cam so that the punching punch moved to the predetermined position by the parallel cam moves from the predetermined position to the insertion position. Punching machine.   2. The punching process according to claim 1, wherein a part of the section in which the drive cam (91) rotates in a rotation direction is an idle running section in which the drive cam does not press the driven cam. apparatus.   The punching device (100) according to any one of claims 1 to 6, wherein the rotation driving unit is a power source for a press operation of a press machine.

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