JP2013022591A - Punching apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching apparatus having a high degree of freedom on a setting position of a punch and capable of being miniaturized.SOLUTION: In the punching apparatus in which punching is applied to a workpiece 600 made from a sheet metal by moving the punch by means of a cam unit 1, a piercing punch 2A is used as a punch. The piercing punch 2A is directly attached and fixed on a cam slider 12A of the cam unit 1 without using a retainer. The piercing punch 2A can have a large clearance against a die 610 to permit an eccentricity of the piercing punch against the die 610. Thus, accurate positioning of a punch position may be unnecessary. Furthermore, a contact resistance force at the time of pulling-out the piercing punch 2A from the die 610 can be lessened so that the piercing punch 2A can be directly attached and fixed on the cam slider 12A without using the retainer.

Description

  The present invention relates to a punching device, and more particularly, to a structure of a punching device that punches a workpiece such as a thin metal plate by moving a piercing punch using a cam unit.

  2. Description of the Related Art Conventionally, a punching device that punches a workpiece such as a thin metal plate by moving the punch using a cam unit is known. 20A and 20B are a front view (partial sectional view) and a right side view of a conventional punch processing apparatus using a cam unit.

  As shown in the figure, the conventional punching apparatus includes a cam unit 8, a punch 9, and a retainer 10.

  The cam unit 8 includes a base 81, a cam slider 82, and a cam driver 83.

  The base 81 includes a base main body 810 and a guide bar 811 attached to the base main body 810 and restricting the moving direction of the cam slider 82.

  The base body 810 is fixed to an upper mold (not shown) and reciprocates in the Y direction together with the upper mold. A sliding surface 812 with the cam slider 82 is formed on the base body 810 along the guide bar 811, and a spring seat 813 is formed around one mounting position of the guide bar 811.

  The cam slider 82 includes a slider main body 820 that is held by the base 81 so as to be movable along the sliding surface 812 of the base main body 810, a spring 821 that urges the slider main body 820 back in the home position A, and the base main body 810. And a slide plate 822 attached to the slider main body 820 so as to be in contact with the sliding surface 812.

  A through hole 823 through which the guide bar 811 passes is formed in the slider main body 820, whereby the slider main body 820 is guided by the guide bar 811 and moves. The through hole 823 is a stepped hole in which the diameter of the region (large diameter region) 824 on the spring seat 813 side of the base body 810 is larger than the diameter of the region 825 on the opposite side of the region 824. The slider body 820 has a mounting surface 826 for the retainer 10, and the mounting surface 826 has a screw hole 827 for bolting the retainer 10 with the hexagon socket bolt 104, and although not shown, A knock hole used for positioning the retainer 10 with the knock pin 105 is formed. Further, the slider main body 820 is formed with a bottom surface side sliding surface 828 that comes into sliding contact with a sliding surface 830 of a cam driver 83 described later.

  The spring 821 is accommodated in the large-diameter region 824 of the through hole 823 so that the guide bar 811 penetrates the inside of the spring 821, and one end abuts against the spring seat 813 of the base body 810 to bring the slider body 820 to the home position A. Energize in the direction of pushing back.

  The slide plate 822 slides in contact with the sliding surface 812 of the base body 810, thereby making the slider body 820 move smoothly.

  The cam driver 83 is fixed to a lower mold (not shown) and restricts the movement of the cam slider 82 in the X direction. The cam driver 83 is formed with a sliding surface 830 that comes into sliding contact with the bottom surface side sliding surface 828 of the slider body 820.

  The punch 9 has a columnar shaft 91, a blade portion 92 formed at the tip end portion of the shaft 91, and a flange 93 formed at the rear end portion of the shaft 91.

  The retainer 10 includes a bolt insertion hole 101 for inserting a hexagon socket head bolt 104 formed at a position facing the screw hole 827 of the slider body 820, a punch insertion hole 102 formed at a holding position of the punch 9, and a slider. A knock hole 103 for inserting a knock pin 105 formed at a position facing a knock hole (not shown) of the main body 820 is formed.

  The punch insertion hole 102 is stepped according to the outer shape of the shaft 91 and the flange 93 of the punch 9 so that the punch 9 inserted into the punch insertion hole 102 does not come out from the side facing the mounting surface 826 of the slider body 820. It is a hole. Then, after inserting the punch 9 into the punch insertion hole 102 from the side facing the mounting surface 826 of the slider main body 820, the retainer 10 is brought into contact with the mounting surface 826, and the knock hole 103 of the retainer 10 and the knock of the slider main body 820 are knocked. Positioning is performed by inserting a knock pin 105 into a hole (not shown). Then, the hexagon socket head bolt 104 is inserted into the bolt insertion hole 101 and bolted into the screw hole 827 of the slider body 820, whereby the punch 9 is fixed to the slider body 820.

  In the configuration as described above, the base 81 is moved in the −Y direction from the state where the slider body 820 is located at the home position A (the state where the base 81 is located in the + Y direction from the position shown in FIG. 20A). Then, the slider body 820 moves on the cam driver 83 in the + X direction. Thereby, the punch 9 moves in the + X direction. As shown in FIG. 20A, when the base 81 is moved in the + Y direction from the state in which the slider main body 820 is away from the home position A, the slider main body 820 is pushed back to the home position A by the spring 821, and the slider The main body 820 moves on the cam driver 83 in the −X direction. Thereby, the punch 9 moves in the −X direction. As described above, by reciprocating the base 81 in the Y direction, the punch 9 can be reciprocated in the X direction. By using this, a sheet metal or the like disposed perpendicular to the moving direction of the punch 9 is used. Can be punched.

  Patent Document 1 discloses a punching apparatus having the above-described configuration in which a punch 9 is used as a punch 9 instead of a normal punch. Here, a general break-through punch is formed by integrally forming a conical protrusion having a diameter smaller than the diameter of the blade portion on the tip surface of the blade portion, and forming a radius on the periphery of the tip surface of the blade portion. Punch.

  In punching using a normal punch 9, the cutting edge of the blade portion 92 of the punch 9 and the cutting edge of a die disposed at a position facing the punch 9 through a workpiece such as a thin metal plate are used as starting points. Cracks are generated from both the front and back surfaces, and the workpiece is punched by connecting these cracks. For this reason, it is necessary to make the clearance between the punch 9 and the die very small (about 0.03 mm to 0.05 mm) in order to properly connect the cracks on the front and back of the workpiece.

  On the other hand, in the breakthrough punch, the work piece is not cracked from the punch side and cracked only on the die side by making the peripheral edge of the tip surface of the blade part round. After a crack is generated in the workpiece from the die side, the workpiece is punched by the breakthrough punch pulling the workpiece to the die side until the crack reaches the punch side of the workpiece.

  Thus, the punching of the breakthrough punch depends only on the cutting edge of the die, and there is no need to adjust the connection of cracks on the front and back of the workpiece unlike the normal punch 9. For this reason, a relatively large clearance (about 0.4 mm to 1.5 mm) can be provided between the punch and the die, and eccentricity of the punch (up to about 0.2 mm) can be allowed.

JP 2005-262263 A

  The conventional punching device including the punching device described in Patent Document 1 needs to be mounted via the retainer 10 when the punch is mounted on the mounting surface 826 of the slider main body 820. It is necessary to secure a region (a screw hole 827, a region for a knock hole). For this reason, the freedom degree of the installation position of the punch 9 on the mounting surface 826 of the slider main body 820 is small. Further, since it is necessary to secure at least an area for mounting the retainer 10 in the slider main body 820, it is difficult to reduce the size of the slider 82, and the punching device becomes large.

  Moreover, since it was difficult to arrange the plurality of retainers 10 on the limited mounting surface 826 of the slider body 820, it was also difficult to install a plurality of punches. Even if a plurality of retainers 10 can be installed, it is necessary to secure an area on the retainer 10 for mounting the retainer 10 itself, and the degree of freedom is reduced even when a plurality of punches are mounted. For this reason, even when a plurality of punches are mounted, the degree of freedom has to be reduced.

  Further, a work such as a thin plate metal cannot be brought closer to the slider body 820 by the thickness of the retainer 10, and the punch 9 becomes longer and the punch processing apparatus becomes larger.

  Such a problem also occurs when a breakthrough punch is used as the punch 9 and fixed to the mounting surface 826 of the slider body 820 via the retainer 10.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a structure of a punch processing apparatus that combines a punch and a cam unit and has a high degree of freedom in the installation position of the punch and can be downsized. There is to do.

  In order to solve the above problems, the present invention uses a piercing punch as a punch in a punching apparatus that punches a workpiece such as a thin metal plate by moving the punch using a cam unit. The breaking punch is directly attached and fixed to the cam slider of the cam unit without using a retainer.

For example, the present invention is a punching device for punching a workpiece such as a sheet metal,
With at least one breakthrough punch,
A cam unit for moving the breakthrough punch,
The breakthrough punch is
A columnar punch body having one end surface and the other end surface; and a one-sided end surface of the punch body, the bottom surface being a circle having a diameter smaller than the diameter of the peripheral edge of the one end surface; A cone-shaped protrusion formed to protrude from the bottom to the workpiece,
The cam unit is
A cam slider that holds at least the piercing punch;
The cam slider is
A punch mounting surface;
A punch insertion hole formed on the punch mounting surface,
The breakthrough punch is
The other end face side of the punch body is inserted into the punch insertion hole and fixed to the cam slider.

Here, the punch body is
A shaft,
And a blade portion formed integrally with the shaft so that the one end surface is a tip surface and having a radius formed on the periphery of the tip surface.

The cam unit is
Base and
The cam slider attached to the base so as to be movable in a direction different from the moving direction of the base;
A cam driver that contacts the cam slider and moves the cam slider in a predetermined direction with respect to the movement of the base may be provided.

The cam slider is
It further has a screw hole for a bolt formed on the punch mounting surface,
The breakthrough punch is
Having a groove formed in the punch body;
The removal prevention plate engaged with the groove may be fixed to the cam slider by being bolted to the bolt screw hole.

The punch insertion hole is formed with a female screw part,
The breakthrough punch is
Having a male thread portion formed at the rear end of the punch body;
The male screw portion may be fixed to the cam slider by screwing with the female screw portion of the punch insertion hole.

The cam slider is
It further has a removal prevention pin insertion hole connected to the side surface of the punch insertion hole from the surface of the cam slider,
The breakthrough punch is
Having a recess formed in the punch body,
It may be inserted into the punch insertion hole, and a removal prevention pin may be inserted into the removal prevention pin insertion hole and fixed to the cam slider by fitting into the recess of the punch body.

The cam slider is
A slip prevention ball insertion hole that is connected from the surface of the cam slider to the side surface of the punch insertion hole, and has an inner diameter larger than the opening formed in the side surface of the punch insertion hole,
Inserted in the escape prevention ball insertion hole, and a withdrawal prevention ball having a diameter larger than that of the opening;
An elastic body inserted into the escape prevention ball insertion hole so as to urge the escape prevention ball in a direction of pressing against the opening from the escape prevention ball insertion hole side;
The breakthrough punch is
Having a recess formed in the punch body,
The removal prevention ball that partially protrudes from the opening toward the punch insertion hole may be fixed to the cam slider by fitting into the recess.

The cam slider is
A piece prevention hole insertion hole that is formed so as to partially cross the punch insertion hole, and that connects the opposing surfaces of the cam slider,
A removal prevention piece inserted into the removal prevention piece insertion hole;
A pair of elastic bodies that urges the removal prevention piece to be pushed from both ends of the removal prevention piece insertion hole so that the removal prevention piece stays at the intersection of the removal prevention piece insertion hole and the punch insertion hole; Further comprising
The breakthrough punch is
Having a groove formed in the punch body;
The removal prevention piece inserted into the punch insertion hole in a state where the removal prevention piece is moved to a position away from the intersection between the removal prevention piece insertion hole and the punch insertion hole, and pushed back to the intersection. It may be engaged with the groove of the punch body and fixed to the cam slider.

The cam slider is
A slip-off prevention piece insertion hole with a bottom surface formed from the surface of the cam slider so as to partially cross the punch insertion hole,
A puller hole connected from the surface opposite to the surface of the cam slider to the bottom surface of the removal prevention piece insertion hole, and an inner diameter smaller than an inner diameter of the removal prevention piece insertion hole;
A removal prevention piece inserted into the insertion hole for the removal prevention piece;
An elastic body inserted into the removal prevention piece insertion hole so as to urge the removal prevention piece in a direction of pressing against the bottom surface of the removal prevention piece insertion hole;
The breakthrough punch is
Having a groove formed in the punch body;
By inserting a pin into the puller hole, the removal prevention piece is inserted into the punch insertion hole in a state of being pushed away from the bottom surface of the removal prevention piece insertion hole, and the pin is inserted from the puller hole. The removal prevention piece pushed back to the bottom surface by being pulled out may be engaged with the groove formed in the punch body and fixed to the cam slider.

  In the present invention, a breakthrough punch is used as the punch, and the breakthrough punch is directly attached and fixed to the cam slider of the cam unit without using a retainer. For this reason, the structure of the punch processing apparatus which combined the breakthrough punch and the cam unit which has a high degree of freedom of the installation position of the punch and can be miniaturized can be provided.

  The breakthrough punch can take a large clearance with the die, and can allow eccentricity with respect to the die. This eliminates the need for precise positioning of the punch position, and the contact resistance when pulling the breakthrough punch out of the die is small, so the breakthrough punch can be directly attached to the cam slider of the cam unit without using a retainer. It can be fixed. Furthermore, it becomes possible to reduce the size of the spring having a function of pushing the cam slider back to the home position, and parts such as forced cam return can be eliminated.

1A and 1B are a front view (partial sectional view) and a right side view of a punching apparatus according to a first embodiment of the present invention. 2 (A) and 2 (B) are a front view and a right side view of the piercing punch 2A of the punch processing apparatus shown in FIG. 1, and FIG. 2 (C) is a cross-sectional view taken along line AA in FIG. 2 (A). FIG. 3A is a front view of the break-off prevention plate 3 of the breakthrough punch 2A of the punching apparatus shown in FIG. 1, and FIG. 3B is a view of B of the break-off prevention plate 3 shown in FIG. It is -B sectional drawing. 4 (A) and 4 (B) are diagrams for explaining the operating principle of the punching apparatus according to the first embodiment of the present invention. 5A and 5B are a front view (partial sectional view) and a right side view of the punching apparatus according to the second embodiment of the present invention. 6 (A) and 6 (B) are a front view and a right side view of the piercing punch 2B of the punch processing apparatus shown in FIG. 5, and FIG. 6 (C) is a cross-sectional view taken along the line CC in FIG. 6 (A). FIG. FIGS. 7A and 7B are a front view and a right side view of a modified example 2B ′ of the breakthrough punch 2B shown in FIG. 6, and FIG. 7C is a DD of FIG. 7A. It is sectional drawing. 8A and 8B are a front view (partial cross-sectional view) and a right side view of the punching apparatus according to the third embodiment of the present invention. 9A and 9B are a front view and a right side view of the piercing punch 2C of the punch processing apparatus shown in FIG. 8, and FIG. 9C is a cross-sectional view taken along line EE of FIG. 9A. FIG. 10A and 10B are a front view and a right side view of the drop prevention pin 4 of the punching apparatus shown in FIG. FIGS. 11A and 11B are a front view (partial cross-sectional view) and a right side view of a punching apparatus according to a fourth embodiment of the present invention. FIG. 12 is an enlarged view of part B of the punching apparatus shown in FIG. FIGS. 13A and 13B are a front view and a right side view of the piercing punch 2D of the punch processing apparatus shown in FIG. 11, and FIG. 13C is a cross-sectional view taken along line FF in FIG. FIG. FIGS. 14A and 14B are a front view (partial cross-sectional view) and a right side view of the punching apparatus according to the fifth embodiment of the present invention. 15 is a GG cross-sectional view of the punching apparatus shown in FIG. 16 (A) and 16 (B) are a front view and a right side view of the piercing punch 2E of the punch processing apparatus shown in FIG. 14, and FIG. 16 (C) is a cross-sectional view taken along line HH in FIG. 16 (A). FIG. FIGS. 17A and 17B are a front view (partial cross-sectional view) and a right side view of a punching apparatus according to a sixth embodiment of the present invention. 18 is a cross-sectional view taken along the line II of the punching apparatus shown in FIG. 19 (A) and 19 (B) are a front view and a right side view of the piercing punch 2F of the punching apparatus shown in FIG. 17, and FIG. 19 (C) is a cross-sectional view taken along line JJ in FIG. 19 (A). FIG. 20A and 20B are a front view (partial sectional view) and a right side view of a conventional punch processing apparatus using a cam unit.

  Embodiments of the present invention will be described below with reference to the drawings.

<First embodiment>
1A and 1B are a front view (partial sectional view) and a right side view of a punching apparatus according to a first embodiment of the present invention.

  As shown in the drawing, the punching apparatus according to the present embodiment fixes a breakthrough punch 2A, a cam unit 1 that reciprocates the breakage punch 2A in the X direction, and a breakthrough punch 2A that is fixed to the cam unit 1. And a slip-off prevention plate 3 and the like. In the present embodiment, the case where two breakthrough punches 2A are provided is shown, but the number of breakthrough punches 2A can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12 </ b> A, and a cam driver 13.

  The base 11 includes a base main body 110 and a guide bar 111 that guides the cam slider 12A. The base body 110 is fixed to an upper mold (not shown) and reciprocates in the Y direction together with the upper mold. Both ends 1111 and 1112 of the guide bar 111 are fixed to the base body 110 while being inclined with respect to the moving direction (Y direction) of the base body 110. The base body 110 is formed with a sliding surface 112 along the guide bar 111 on which a slide plate 122 attached to a cam slider 12A described later slides. A spring seat 113 is formed around the attachment position of one end 1111 of the guide bar 111.

  The cam slider 12A is attached to the base 11 so as to be movable in a direction different from the moving direction (Y direction) of the base 11. Specifically, the cam slider 12A includes a slider main body 120A that is held by the base 11 so as to be movable along the sliding surface 112 of the base main body 110, and a spring that biases the slider main body 120A in a direction to push the slider main body 120A back to the home position A. 121, and a slide plate 122 attached to the upper surface 1200 of the slider main body 120A so as to come into contact with the sliding surface 112 of the base main body 110.

  A through hole 123 through which the guide bar 111 passes is formed in the slider main body 120 </ b> A, so that the slider main body 120 </ b> A moves along the guide bar 111. The through hole 123 is an area on the opposite side to the one area 124 in the diameter of one area (large diameter area in which the spring 121 is accommodated) 124 which is an area on the spring seat 113 side of the base body 110. The stepped hole is larger than the diameter of the region 125 on the other side.

  Further, the slider main body 120A is formed in a direction perpendicular to the moving direction of the cam slider 12A restricted by the cam driver 13 (in the present embodiment, perpendicular to the X direction), and the punch mounting surface 126 is formed. In this punch mounting surface 126, punch insertion holes 127 into which the breakthrough punch 2A is inserted are formed at least as many as the number of the breakthrough punches 2A. A screw hole 129 for tightening is formed. Furthermore, a bottom surface side sliding surface 128 is formed on the bottom surface 1201 of the slider body 120A so that a sliding surface 130 of the cam driver 13 described later slides in the X direction.

  The spring 121 is accommodated in the large-diameter region 124 of the through hole 123 through which the guide bar 111 passes, one end 1211 abuts against the spring seat 113 of the base body 110, and the other end 1212 contacts the bottom surface 1231 of the through hole 123. In contact therewith, the slider body 120A is urged in a direction to push it back to the home position A.

  The slide plate 122 slides in contact with the sliding surface 112 of the base body 110, thereby smoothing the movement of the slider body 120A. For the slide plate 122, for example, a sliding member such as Oiles # 2000 manufactured by Oiles Kogyo Co., Ltd. is used. This Oiles # 2000 has a two-layer structure consisting of a metal member as a back metal and a sliding layer formed on the surface thereof. This sliding layer contains 4 to 10% of tin by weight ratio. , 10 to 40% of nickel, 0.5 to 4% of phosphorus, 3 to 10% of graphite, and a green compact layer containing copper as the balance, as a back metal such as iron, iron alloy, copper and copper alloy It is formed by sintering what was formed on the metal member.

  In this embodiment, the slide plate 122 is attached to the upper surface 1200 side of the slider main body 120A, but the slide plate 122 may be attached to the base main body 110 side. That is, instead of forming the sliding surface 112 on the base body 110, the slide plate 122 is attached, and on the upper surface 1200 side of the slider body 120A, a sliding surface that slides with the slide plate 122 attached to the base body 110 is formed. You may do it. Alternatively, the slide plate 122 may be attached to both the upper surface 1200 side and the base body 110 side of the slider main body 120A, and may be slid between the sliding layers of the sliding member.

  The cam driver 13 is fixed to a lower mold (not shown). The cam driver 13 is formed with a sliding surface 130 on which the bottom side sliding surface 128 of the slider body 120A slides in the X direction. The cam driver 13 guides the movement of the cam slider 12A in the X direction by the sliding surface 130 coming into contact with the bottom surface side sliding surface 128 of the slider main body 120A. The cam slider 12A is moved in the X direction. In the present embodiment, a sliding member may be attached to one or both of the sliding surface 128 of the slider main body 120A and the sliding surface 130 of the cam driver 13 to slide them.

  2A, 2 </ b> B, and 2 </ b> C are a front view, a right side view, and a cross-sectional view taken along line AA of the breakthrough punch 2 </ b> A of the punch processing apparatus shown in FIG. 1.

  The breaking punch 2A is inserted into the punch insertion hole 127 of the punch mounting surface 126 of the slider main body 120A so as to be parallel to the moving direction of the cam slider 12A restricted by the cam driver 13 (X direction in the present embodiment). The slider body 120A is fixed. As shown in the figure, this breakthrough punch 2A has a cylindrical shaft 21A having one end surface 28 and the other end surface 27, and a blade portion formed integrally and connected to the other end surface 27 of the shaft 21A. 22.

  On the side surface of the shaft 21 </ b> A, a notch groove 231 that engages with the removal prevention plate 3 is formed in a direction perpendicular to the axial direction 200. This notch groove 231 is exposed from the punch insertion hole 127 of the slider body 120A when the one end face 28 of the shaft 21A is inserted into the punch insertion hole 127 of the slider body 120A (preferably, the notch groove 231). The wall surface 232 on the one end face 28 side is formed on the punch mounting surface 126).

  The blade portion 22 includes a blade portion main body 220 and a protruding portion 25. One end surface 229 of the blade body 220 is connected to the other end surface 27 of the shaft 21 </ b> A, and a conical protrusion 25 is formed on the other end surface 24. Further, a radius 26 is formed on the peripheral edge of the other end surface 24 of the blade body 220. The diameter r2 of the bottom-side end surface 251 of the conical protrusion 25 is smaller than the diameter r1 of the other end surface 24 of the blade body 220.

  3A is a front view of the break-off prevention plate 3 of the breakthrough punch 2A of the punching apparatus shown in FIG. 1, and FIG. 3B is a view of B of the break-off prevention plate 3 shown in FIG. It is -B sectional drawing.

  As shown in the figure, the slip-off prevention plate 3 is an L-shaped plate-like member having a thickness t that engages with a notch groove 231 formed in the shaft 21A of the breaking punch 2A. A through hole 30 for inserting a hexagon socket head bolt 31 is formed in 32. As shown in FIG. 1B, the breakthrough punch 2A is inserted into the punch insertion hole 127 of the punch mounting surface 126 of the slider body 12 in a state in which the removal prevention plate 3 is engaged with the notch groove 231 of the shaft 21A. Inserted. Alternatively, in the state where one end face 28 of the shaft 21A of the break punch 21A is inserted into the two punch insertion holes 127 of the punch mounting surface 126 of the slider body 120A, the shaft 21A of the two break punches 21A is cut. The L-shaped leg portions 33 of the drop prevention plate 3 are inserted into the notch grooves 231 respectively. Then, the hexagon socket head cap screw 31 inserted into the through hole 30 of the drop prevention plate 3 is bolted to the screw hole 129 formed in the punch mounting surface 126 of the slider main body 120A, so that the breakthrough punch 2A becomes the slider main body. Fixed to 120A.

  In the present embodiment, the drop prevention plate 3 is L-shaped, but engages with the notch groove 231 of the shaft 21A of all the breakthrough punches 2A mounted on the punch mounting surface 126 of the slider body 120A. On the other hand, any shape may be used as long as the hexagon socket head bolt 31 inserted into the through hole 30 can be bolted to the screw hole 129 formed in the punch mounting surface 126 of the slider body 120A. . When the two breakthrough punches 2A are arranged so that the notch grooves 231 of the shaft 21A face each other, the shape of the drop prevention plate 3 is, for example, inserted between the two breakthrough punches 2A, A belt-like shape inserted into the notch groove 231 of each shaft 21A may be used.

  4 (A) and 4 (B) are diagrams for explaining the operating principle of the punching apparatus according to the first embodiment of the present invention.

  As shown in FIG. 4A, when the base 11 is moved in the −Y direction by lowering the upper die from the state where the slider main body 120A is positioned at the home position A, the cam slider 12A moves on the cam driver 13 in the + X direction. Move to. Thereby, as shown in FIG. 4B, the breakthrough punch 2A moves in the + X direction.

  Further, as shown in FIG. 4B, when the base 11 is moved in the + Y direction from the state where the slider main body 120A is separated from the home position A, the slider main body 120A is pushed back to the home position A by the spring 121, and the cam slider 12A. Moves on the cam driver 13 in the -X direction. Thereby, the breakthrough punch 2A moves in the −X direction.

  Therefore, by reciprocating the base 11 in the Y direction, the breaking punch 2A can be reciprocated in the X direction. By using the reciprocating movement of the breaking punch 2A in the X direction, the breaking punch 2A Punching can be performed on a workpiece 600 such as a thin metal plate arranged perpendicular to the moving direction.

  4A and 4B, reference numeral 610 denotes a die. The die 610 is disposed at a position facing the breakthrough punch 2A through the workpiece 600, and is fixed to the lower die 630, for example. The Reference numeral 620 denotes a pad for preventing the workpiece 600 from being rolled when the breaking punch 2A is pulled out from the die 610.

  The first embodiment of the present invention has been described above.

  In the present embodiment, a breakthrough punch 2A is used as a punch, and this breakage punch 2A is directly attached and fixed to the cam slider 12A of the cam unit 1 without using a retainer. For this reason, unlike the conventional punching apparatus as shown in FIG. 20, it is not necessary to secure an area for mounting the retainer on the punch mounting surface 126 of the slider body 120A. Therefore, since the area where the punching punch 2A on the punch mounting surface 126 can be freely fixed increases, the degree of freedom of the setting position of the punching punch 2A (the position of the mounting position of the punching punch 2A on the punch mounting surface 126 of the slider body 120A) The degree of freedom) is high and the area of the punch mounting surface 126 can be reduced, so that the cam slider 12 and thus the cam unit 1 itself can be reduced in size, and the punch processing apparatus can be reduced in size accordingly. it can. Also, as shown in FIG. 1, it is possible to arrange a plurality of breakthrough punches 2A close to each other, and therefore it is possible to simultaneously punch a plurality of holes arranged close to each other.

  Further, since the retainer is not provided, it is not necessary to consider the thickness of the retainer. Therefore, the workpiece 600 can be brought closer to the slider main body 120A by the thickness of the retainer, and accordingly, the breakthrough punch 2A. Thus, the punching device can be downsized.

  In the present embodiment, a screw hole 129 is provided in the punch mounting surface 126 of the slider main body 120A, and a notch groove 231 is provided in the shaft 21A of the breakthrough punch 2A. Then, one end face 28 of the breaking punch 2A is inserted into the punch insertion hole 127 of the slider main body 120A in a state where the slip-off preventing plate 3 is engaged with the notch groove 231 of the breaking punch 2A. Alternatively, with one end face 28 of the piercing punch 21A inserted into the punch insertion hole 127 of the punch mounting surface 126 of the slider main body 120A, the removal preventing plate 3 is inserted into the notch groove 231 of the piercing punch 21A. It is. Then, the hexagon socket head cap bolt 31 inserted into the through hole 30 of the removal prevention plate 3 is bolted to the screw hole 129 of the punch mounting surface 126. Thereby, the breakthrough punch 2A is fixed to the slider main body 120A.

  For this reason, the shape of the removal prevention plate 3 is designed in accordance with the mounting positions of the plurality of breakthrough punches 2A on the slider body 120A, so that the plurality of breakthrough punches 2A arranged at desired positions on the punch mounting surface 126. Can be fixed at the same time with a single slip-off prevention plate 3, and the workability in mounting a plurality of breakthrough punches 2A to the slider body 120A can be improved.

  As described above, in the breakthrough punch 2A, the rounds 26 are formed on the peripheral edge of the tip surface 24 of the blade portion 22, so that no crack is generated in the workpiece 600 from the breakthrough punch 2A side, and the die 610 is formed. Cracks occur only on the side. After the crack is generated from the die 610 side, the workpiece 600 is punched by the break punch 2A pulling the workpiece 600 until the crack reaches the break punch 2A side of the workpiece 600. Thus, the punching of the breakthrough punch 2A depends only on the cutting edge 611 of the die 610, and there is no need to adjust the connection of cracks on the front and back of the workpiece 600 as in the case of a normal punch. For this reason, it becomes possible to provide a large clearance (about 0.4 mm to 1.5 mm) between the blade portion main body 220 of the breakthrough punch 2A and the die 610 as compared with the case of using a conventional punch. The eccentricity of the punch 2A (up to about 0.2 mm) is also acceptable.

  Therefore, by using the breakthrough punch 2A, it is not necessary to precisely position the punch and the die. Further, since the contact drag when pulling out the breakthrough punch 2A from the die 610 is reduced, the breakthrough punch 2A can be directly attached and fixed to the cam slider 12A without using a retainer. Further, the spring 121 for pushing the slider main body 120A back to the home position A can be used with a small diameter, and parts such as forced cam return can be dispensed with.

  In the present embodiment, a plurality of breakthrough punches 2A are combined and fixed to the slider main body 120A by one piece of the prevention plate 3, but the present invention is not limited to this. It is also possible to prepare a drop prevention plate 3 for each breakthrough punch 2A and fix the plurality of breakthrough punches 2A individually to the slider body 120A. For example, for each breakthrough punch 2A, the slip-off prevention plate 3 is screwed to the punch mounting surface 126 of the slider main body 120A in advance, and the punch-off of the slider main body 120A is rotated. You may make it insert the prevention plate 3 in the notch groove 231 of the shaft 21A of the breaking punch 21A inserted in the punch insertion hole 127 of the mounting surface 126.

<Second embodiment>
5A and 5B are a front view (partial sectional view) and a right side view of the punching apparatus according to the second embodiment of the present invention. In the present embodiment, the same components as those in the punching apparatus according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in the figure, the punching apparatus according to the present embodiment includes a breakthrough punch 2B and a cam unit 1 that reciprocates the breakage punch 2B in the X direction. In the present embodiment, the case where two breakthrough punches 2B are provided is shown, but the number of breakthrough punches 2B can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12 </ b> B, and a cam driver 13.

  The cam slider 12B is attached to the base 11 so as to be movable in a direction different from the moving direction of the base 11 (Y direction). Specifically, the cam slider 12B includes a slider main body 120B that is held by the base 11 so as to be movable along the sliding surface 112 of the base main body 110, and a spring that biases the slider main body 120B in a direction to push it back to the home position A. 121, and a slide plate 122 attached to the upper surface 1200 of the slider main body 120B so as to come into contact with the sliding surface 112 of the base main body 110.

  A through hole 123 through which the guide bar 111 passes is formed in the slider main body 120 </ b> B, whereby the slider main body 120 </ b> B moves along the guide bar 111. The through hole 123 is an area on the opposite side to the one area 124 in the diameter of one area (large diameter area in which the spring 121 is accommodated) 124 which is an area on the spring seat 113 side of the base body 110. The stepped hole is larger than the diameter of the region 125 on the other side. The slider main body 120B has a punch mounting surface 126 formed so as to cross the moving direction (X direction) of the cam slider 12B (preferably perpendicular to the X direction). In 126, punch insertion screw holes 141 into which screw portions 232 of the breakthrough punch 2B, which will be described later, are screwed are formed at least for the number of breakthrough punches 2B. Furthermore, a bottom surface side sliding surface 128 on which the sliding surface 130 of the cam driver 13 slides is formed on the bottom surface 1201 of the slider body 120B.

  6A, 6 </ b> B, and 6 </ b> C are a front view, a right side view, and a CC cross-sectional view of the piercing punch 2 </ b> B of the punch processing apparatus shown in FIG. 5.

  As shown in the figure, the breaking punch 2B includes a cylindrical shaft 21B having one end surface 28 and the other end surface 27, and a blade portion 22 formed integrally and connected to the other end surface 27 of the shaft 21B. And. On one end face 28 of the shaft 21B, a male screw portion 232 that is screwed into the punch insertion screw hole 141 of the punch mounting surface 126 is formed. Also, a pair of gripping tools (for example, a spanner) used for screwing the piercing punch 2B into the punch insertion screw hole 141 in a direction perpendicular to the axial direction 200 is provided on the side surface of the shaft 21B. The notch groove 233 is formed. The pair of cutout grooves 233 is formed so that one of the cutout grooves 233 extends from the punch insertion screw hole 141 of the slider main body 120B when the breaking punch 2B is screwed into the punch insertion screw hole 141 of the slider main body 120B. The wall surface 2331 on the end face 28 side is formed at a position where it is exposed at least.

  By making the pair of notch grooves 233 gripped by a tightening / loosing work tool and screwing the male screw portion 232 into the punch insertion screw hole 141 of the slider main body 120B, the breaking punch 2B moves in the moving direction (X Is inserted into the punch insertion screw hole 141 of the slider main body 120B and is fixed to the slider main body 120B.

  The operating principle of the punching apparatus according to the present embodiment is the same as the operating principle of the punching apparatus according to the first embodiment shown in FIGS. 4 (A) and 4 (B).

  The second embodiment of the present invention has been described above.

  In this embodiment, a breakthrough punch 2B is used as a punch, and this breakage punch 2B is directly attached and fixed to the punch mounting surface 126 of the cam slider 12B of the cam unit 1 without using a retainer. For this reason, as in the first embodiment of the present invention, the degree of freedom of the installation position of the breakthrough punch 2B is high, and the size of the punch 12 can be reduced by downsizing the slider 12. Further, as shown in FIG. 5, a plurality of holes can be punched simultaneously by arranging a plurality of breakthrough punches 2B close to each other. Furthermore, since it is not necessary to consider the thickness of the retainer, the punching device can be downsized.

  In the present embodiment, a punch insertion screw hole 141 is provided on the punch mounting surface 126 of the slider main body 120B, and a male screw portion 232 is provided on one end surface 28 of the shaft 21B of the breakthrough punch 2B. The breakthrough punch 2B is fixed to the slider main body 120B by screwing the male screw portion 232 of 2B into the screw hole 141 for punch insertion. For this reason, since it is not necessary to separately prepare parts for fixing the breakthrough punch 2B to the slider body 120B, the number of parts of the punching apparatus can be reduced.

  In the present embodiment, a pair of notch grooves 233 are formed on the side surface of the shaft 21B of the breakthrough punch 2B to allow the tightening / loosening work tool to hold the breakthrough punch 2B. It is not limited to this. FIGS. 7A, 7B, and 7C are a front view, a right side view, and a DD cross-sectional view of Modification 2B ′ of the breakthrough punch 2B shown in FIG.

  As shown in the figure, when the diameter of the shaft 21B ′ is thin, and it is difficult to form a pair of notch grooves 233 on the side surface of the shaft 21B ′ while maintaining sufficient strength, for example, FIG. Like the breaking punch 2B ′ shown in (A) and (B), the shaft 21B ′ is provided with a cylindrical portion 234 having a diameter larger than that of the shaft 21B ′, and a pair of notches 235 are formed on the side surfaces of the cylindrical portion 234. You may make it form. In this case, a knock hole into which the cylindrical portion 234 is fitted may be formed in the punch insertion screw hole 141 of the slider main body 120B, and the cylindrical portion 234 may be used for positioning.

<Third embodiment>
8A and 8B are a front view (partial cross-sectional view) and a right side view of the punching apparatus according to the third embodiment of the present invention. In the present embodiment, the same components as those in the punching apparatus according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in the drawing, the punching apparatus according to the present embodiment includes a breakthrough punch 2C, a cam unit 1 that reciprocates the breakage punch 2C in the X direction, and the like. In the present embodiment, a case where one breakthrough punch 2C is provided is shown, but the number of breakthrough punches 2C can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12 </ b> C, and a cam driver 13. The cam slider 12C is attached to the base 11 so as to be movable in a direction different from the moving direction (Y direction) of the base 11. Specifically, the cam slider 12C includes a slider main body 120C that is held by the base 11 so as to be movable along the sliding surface 112 of the base main body 110, and a spring that biases the slider main body 120C in a direction to push the slider main body 120C back to the home position A. 121, and a slide plate 122 attached to the upper surface 1200 of the slider main body 120C so as to come into contact with the sliding surface 112 of the base main body 110. Furthermore, a breakage prevention pin 4 for locking the breakthrough punch 2C to the cam unit 1 is provided.

  A through-hole 123 through which the guide bar 111 passes is formed in the slider main body 120 </ b> C, so that the slider main body 120 </ b> C moves along the guide bar 111. The through hole 123 is an area on the opposite side to the one area 124 in the diameter of one area (large diameter area in which the spring 121 is accommodated) 124 which is an area on the spring seat 113 side of the base body 110. The stepped hole is larger than the diameter of the region 125 on the other side.

  In addition, the slider main body 120C is formed in a direction perpendicular to the moving direction of the cam slider 12C restricted by the cam driver 13 (in the present embodiment, perpendicular to the X direction), and the punch mounting surface 126 is formed. The punch mounting surface 126 is formed with a punch insertion hole 142 into which one end face 28 of the shaft 21C of the breakthrough punch 2C described later is inserted.

  Further, a bottom surface side sliding surface 128 on which the sliding surface 130 of the cam driver 13 slides is formed on the bottom surface 1201 of the slider main body 120C. Further, the punch insertion hole 142 is formed from the bottom surface side sliding surface 128. A drop prevention pin insertion hole 143 connected to the side surface is formed. In the removal prevention pin insertion hole 143, a first female screw portion 144 screwed with the removal prevention pin 4 and a second female screw portion screwed with the ear screw 41 for preventing the loosening prevention pin 4 from rattling. 145.

  9A and 9B are a front view and a right side view of the piercing punch 2C of the punch processing apparatus shown in FIG. 8, and FIG. 9C is a cross-sectional view taken along line EE of FIG. 9A. FIG.

  As shown in the figure, the breakthrough punch 2C includes a cylindrical shaft 21C having one end surface 28 and the other end surface 27, and a blade portion 22 formed integrally connected to the other end surface 27 of the shaft 21C. And. On the side surface of the shaft 21 </ b> C, a recess 236 that fits with the removal prevention pin 4 is formed. The recess 236 is formed at a position where one end face 28 of the shaft 21C of the breaking punch 2C is connected to the removal preventing pin insertion hole 143 when it is inserted into the punch insertion hole 142 of the slider body 120C.

  10A and 10B are a front view and a right side view of the drop prevention pin 4 of the punching apparatus shown in FIG.

  As shown in the figure, the drop prevention pin 4 is a hexagon socket head cap screw having a male threaded portion 42, and a projection that fits into the recess 236 of the shaft 21C of the breakthrough punch 2C on the front end surface 44 of the male threaded portion 42. A portion 43 is formed.

  One end face 28 of the shaft 21C of the breakthrough punch 2C is inserted into the punch insertion hole 142, and the concave portion 236 of the shaft 21C is positioned at the removal prevention pin insertion hole 143 connected to the side surface of the punch insertion hole 142, and the removal prevention pin 4 is inserted into the removal prevention pin insertion hole 143, and the male screw portion 42 of the removal prevention pin 4 is screwed with the first female screw portion 144, whereby the distal end surface 44 of the male screw portion 42 of the removal prevention pin 4 is obtained. The projecting portion 43 formed in is fitted into the recessed portion 236 of the shaft 21C. Thereby, the breakthrough punch 2C is held in the punch insertion hole 142 of the slider main body 120C and fixed to the slider main body 120C so as to be parallel to the moving direction (X direction) of the cam slider 12C. Also, the screw 41 is inserted into the removal prevention pin insertion hole 143 and screwed into the second female screw portion 145, so that the removal prevention pin 4 is prevented from being rattled. It is firmly fixed.

  The operating principle of the punching apparatus according to the present embodiment is the same as the operating principle of the punching apparatus according to the first embodiment shown in FIGS. 4 (A) and 4 (B).

  The third embodiment of the present invention has been described above.

  In the present embodiment, a breakthrough punch 2C is used as a punch, and this breakage punch 2C is directly attached and fixed to the punch mounting surface 126 of the cam slider 12C of the cam unit 1 without using a retainer. For this reason, like the first embodiment of the present invention, the degree of freedom of the installation position of the breakthrough punch 2C is high, and the size of the punch 12 can be reduced by downsizing the slider 12. Moreover, since it is not necessary to consider the thickness of a retainer, a punching apparatus can be reduced in size.

  In the present embodiment, the slide-off preventing pin insertion hole 143 connected to the side surface of the punch insertion hole 142 is formed on the bottom sliding surface 128 of the slider main body 120C, but the present invention is not limited to this. The removal prevention pin insertion hole 143 may be formed so as to be connected to the side surface of the punch insertion hole 142 from the surface other than the punch mounting surface 126 of the slider body 120C.

  In the present embodiment, a hexagon socket head cap screw having a protrusion 43 formed on the front end surface 44 of the male screw portion 42 is used as the prevention pin 4, but the present invention is not limited to this. Any shape can be used as long as it can be inserted into the removal prevention pin insertion hole 143 and fitted into the recess 236 of the breakthrough punch 2C inserted into the punch insertion hole 142 to fix the breakthrough punch 2C. It may be.

  In the present embodiment, the screw 41 is used to prevent the removal prevention pin 4 inserted in the removal prevention pin insertion hole 143 from being loose, but the present invention is not limited to this. For example, a spring pin may be used in place of the screw 41 to prevent the removal prevention pin 4 inserted into the removal prevention pin insertion hole 143 from rattling. Alternatively, the screw 41 may be omitted if there is a mechanism for preventing the looseness prevention pin 4 itself from rattling.

<Fourth embodiment>
FIGS. 11A and 11B are a front view (partial cross-sectional view) and a right side view of a punching apparatus according to a fourth embodiment of the present invention, and FIG. 12 is a punching apparatus shown in FIG. FIG. In the present embodiment, the same components as those in the punching apparatus according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in the drawing, the punching apparatus according to the present embodiment includes a breakthrough punch 2D, a cam unit 1 that reciprocates the breakage punch 2D in the X direction, and the like. In the present embodiment, the case where one breakthrough punch 2D is provided is shown, but the number of breakthrough punches 2D can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12D, and a cam driver 13. The cam slider 12D is attached to the base 11 so as to be movable in a direction different from the moving direction (Y direction) of the base 11. Specifically, the cam slider 12D includes a slider main body 120D that is held by the base 11 so as to be movable along the sliding surface 112 of the base main body 110, and a spring that biases the slider main body 120D in a direction to push the slider main body 120D back to the home position A. 121, and a slide plate 122 attached to the upper surface 1200 of the slider main body 120D so as to come into contact with the sliding surface 112 of the base main body 110. Further, a break-off prevention ball 5 for locking the break-through punch 2D to the cam unit 1, a spring 51, and a pin 52 are provided.

  A through-hole 123 through which the guide bar 111 passes is formed in the slider main body 120D, and thereby the slider main body 120D moves along the guide bar 111. The through hole 123 is an area on the opposite side to the one area 124 in the diameter of one area (large diameter area in which the spring 121 is accommodated) 124 which is an area on the spring seat 113 side of the base body 110. The stepped hole is larger than the diameter of the region 125 on the other side.

  The slider main body 120D is formed in a direction perpendicular to the moving direction of the cam slider 12D regulated by the cam driver 13 (in the present embodiment, perpendicular to the X direction), and the punch mounting surface 126 is formed. A punch insertion hole 146 into which one end face 28 of the shaft 21D of the breaking punch 2D described later is inserted is formed in the punch mounting surface 126. On the side surface of the punch insertion hole 146, a ball exposure port 149 having a smaller diameter than the removal prevention ball 5 inserted into a later-described removal prevention ball insertion hole 147 is formed. A puller hole 148 connected to the ball exposure port 149 is formed in the punch mounting surface 126.

  Further, a bottom surface side sliding surface 128 on which the sliding surface 130 of the cam driver 13 slides is formed on the bottom surface 1201 of the slider body 120D, and the ball exposure port 149 of the punch insertion hole 146 extends from the bottom surface side sliding surface 128. A hole preventing ball insertion hole 147 having a diameter larger than that of the hole preventing ball 5 is formed. The drop prevention ball 5, the spring 51, and the knock pin 52 are accommodated in the drop prevention ball insertion hole 147. Specifically, the escape prevention ball insertion hole 147 pushes the spring 51 into the spring accommodation portion 150 and the spring accommodation portion 150 that accommodates the spring 51 that urges the escape prevention ball 5 in the direction of pressing the ball exposure port 149. And a pin insertion portion 151 into which a knock pin 52 is inserted. The spring 51 accommodated in the spring accommodating portion 150 and the knock pin 52 fitted in the pin fitting portion 151 are pressed against the ball exposure port 149 and a part thereof is exposed inside the punch insertion hole 146. .

  FIGS. 13A, 13B, and 13C are a front view, a right side view, and a FF cross-sectional view of the breakthrough punch 2D of the punch processing apparatus shown in FIG.

  As shown in the figure, the breakthrough punch 2D includes a cylindrical shaft 21D having one end surface 28 and the other end surface 27, and a blade portion 22 formed integrally connected to the other end surface 27 of the shaft 21D. And. On the side surface of the shaft 21 </ b> D, a recess 237 is formed that fits the escape prevention ball 5 that is partially exposed from the ball exposure port 149 of the punch insertion hole 146. The recess 237 is formed at a position where the break punch 2D is connected to the ball exposure port 149 when the break punch 2D is inserted into the punch insertion hole 146 of the slider body 120D.

  As described above, in the spring accommodating portion 150, the drop prevention ball 5 is pressed against the ball exposure port 149 by the spring 51 and the knock pin 52, and a part of the ball insertion port 149 is exposed inside the punch insertion hole 146. . When one end face 28 of the break-through punch 2D shaft 21D is inserted into the punch insertion hole 146 and the recess 237 of the shaft 21D is aligned with the ball exposure port 149, a part of the ball exposure port 149 is exposed. The prevention ball 5 is fitted into the recess 237 of the shaft 21D. Thereby, the breakthrough punch 2D is inserted into the punch insertion hole 146 of the slider main body 120D so as to be parallel to the moving direction (X direction) of the cam slider 12D, and is fixed to the slider main body 120D. The breaking punch 2D fixed to the slider body 120D inserts a pin or the like into the puller hole 148, pushes the removal prevention ball 5 back into the removal prevention ball insertion hole 147, and removes the recess 237 of the shaft 21D and the removal prevention ball 5 By releasing the lock by fitting, the punch insertion hole 146 can be pulled out.

  The operating principle of the punching apparatus according to the present embodiment is the same as the operating principle of the punching apparatus according to the first embodiment shown in FIGS. 4 (A) and 4 (B).

  The fourth embodiment of the present invention has been described above.

  In this embodiment, a breakthrough punch 2D is used as a punch, and this breakage punch 2D is directly attached and fixed to the punch mounting surface 126 of the cam slider 12D of the cam unit 1 without using a retainer. For this reason, like the first embodiment of the present invention, the degree of freedom of the installation position of the breakthrough punch 2D is high, and the slider 12 can be miniaturized, and the punch processing apparatus can be miniaturized correspondingly. Can do. Moreover, since it is not necessary to consider the thickness of a retainer, a punching apparatus can be reduced in size.

  In the present embodiment, the breakthrough punch 2D can be fixed to the slider body 120D simply by inserting the breakthrough punch 2D into the punch insertion hole 146 and aligning the recess 237 of the shaft 21D with the ball exposure port 149. Then, by inserting a pin or the like into the puller hole 148 and then pulling out the prevention ball 5 and pushing back the prevention ball insertion hole 147, the punch 2D can be pulled out from the punch insertion hole 146. For this reason, the tightening / loosening work for attaching / detaching the break-through punch 2D to / from the cam unit 1 becomes unnecessary, and the workability is improved.

  In the present embodiment, the sliding prevention ball insertion hole 147 connected to the ball exposure port 149 is formed on the bottom sliding surface 128 of the slider body 120C, but the present invention is not limited to this. The removal preventing ball insertion hole 147 may be formed so as to be connected to the ball exposure port 149 from a surface other than the punch mounting surface 126 of the slider main body 120D such as a side surface of the slider main body 120D.

<Fifth embodiment>
14A and 14B are a front view (partial cross-sectional view) and a right side view of a punching apparatus according to a fifth embodiment of the present invention, and FIG. 15 is a punching apparatus shown in FIG. It is GG sectional drawing of. In the present embodiment, the same components as those in the punching apparatus according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in the drawing, the punching apparatus according to the present embodiment includes a breakthrough punch 2E, a cam unit 1 that reciprocates the breakage punch 2E in the X direction, and the like. In the present embodiment, the case where one breakthrough punch 2E is provided is shown, but the number of breakthrough punches 2E can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12E, and a cam driver 13.

  The cam slider 12E is attached to the base 11 so as to be movable in a direction different from the moving direction (Y direction) of the base 11. Specifically, the cam slider 12E includes a slider body 120E that is held by the base 11 so as to be movable along the sliding surface 112 of the base body 110, and a spring that urges the slider body 120E in a direction to push the slider body 120E back to the home position A. 121 and a slide plate 122 attached to the upper surface 1200 of the slider main body 120E so as to come into contact with the sliding surface 112 of the base main body 110. Further, a break-off prevention piece 6A for locking the breaking punch 2E to the cam unit 1, a pair of springs 64A and 64B, and a pair of potato screws 65A and 65B are provided.

  A through-hole 123 through which the guide bar 111 passes is formed in the slider main body 120E, whereby the slider main body 120E moves along the guide bar 111. The through hole 123 has a diameter of one side region (large-diameter region in which the spring 121 is accommodated) 124 that is a region on the spring seat 113 side of the base body 110, and the other side that is a region opposite to the one side region. A stepped hole larger than the diameter of the side region 125 is formed.

  The slider main body 120E is formed in a direction perpendicular to the moving direction of the cam slider 12E restricted by the cam driver 13 (in the present embodiment, perpendicular to the X direction), and the punch mounting surface 126 is formed. The punch mounting surface 126 is formed with a punch insertion hole 152 into which the breaking punch 2E is inserted. Further, a bottom surface side sliding surface 128 on which the sliding surface 130 of the cam driver 13 slides is formed on the bottom surface 1201 of the slider body 120E.

  Further, the slider main body 120E partially crosses the punch insertion hole 152 (see the intersection D in FIG. 15), and both sides of the slider main body 120E (the opposite XY surfaces on both sides of the punch mounting surface 126) 160A. , 160B, and a drop prevention piece insertion hole 153. The removal prevention piece insertion hole 153 accommodates the removal prevention piece 6A, and further, springs 64A and 64B are accommodated on both sides of the removal prevention piece 6A. Female screw portions 154A and 154B are formed at both ends of the anti-detachment piece insertion hole 153, and a pair of springs disposed on both sides of the anti-detachment piece 6A and the anti-detachment piece 6A are formed on these female screw portions 154A and 154B. Screws 65A and 65B for screwing 64A and 64B into the inside of the prevention frame insertion hole 153 are screwed together. Here, at least one of the screws 65A and 65B is formed with a through hole 651 for inserting a pin into the removal prevention piece insertion hole 153.

  The drop prevention piece 6A includes a piece body 61 and spring guides 63A and 63B for guiding springs 64A and 64B disposed on both sides of the piece body 61. The top body 61 is formed with a protrusion 62 that engages with a notch groove 238 formed in a shaft 21E of a breakthrough punch 2E described later.

  For example, a screw 65A is screwed into one female screw portion 154A of the removal prevention piece insertion hole 153, and one spring 64A, the removal prevention piece 6A, and the other is inserted into the removal prevention piece insertion hole 153 from the other female screw portion 154B side. The springs 64B are inserted in this order, and then the female screw 154B is screwed into the other female screw part 154B. Or, conversely, the other screw 64B is screwed into the other female screw portion 154B of the removal prevention piece insertion hole 153, and the other spring 64B is inserted into the removal prevention piece insertion hole 153 from the one female screw portion 154A side. The slip-off prevention piece 6A and the one spring 64A are inserted in this order, and then the worm screw 65A is screwed into the one female screw portion 154A. As a result, in the drop prevention piece insertion hole 153, the drop prevention piece 6A remains at a position where the elastic forces of the springs 64A and 64B on both sides are balanced. Here, the springs 64 </ b> A and 64 </ b> B are adjusted so that the protrusion 62 of the slip-off prevention piece 6 </ b> A is positioned at the intersection D between the punch insertion hole 152 and the drop-off prevention piece insertion hole 153.

  FIGS. 16A, 16B, and 16C are a front view, a right side view, and an HH cross-sectional view of the breakthrough punch 2E of the punch processing apparatus shown in FIG.

  As shown in the figure, the breakthrough punch 2E includes a cylindrical shaft 21E having one end surface 28 and the other end surface 27, and a blade portion 22 formed integrally with the other end surface 27 of the shaft 21E. And. On the side surface of the shaft 21E, a notch groove 238 in the diametrical direction that engages with the removal preventing piece 6A is formed. This notch groove 238 is an intersection of the punch insertion hole 152 and the removal prevention piece insertion hole 153 when one end face 28 of the shaft 21E of the breaking punch 2E is inserted into the punch insertion hole 152 of the slider body 120E. D is formed at a position matching D.

  As described above, the springs 64 </ b> A and 64 </ b> B are arranged such that the protrusion 62 of the slip prevention piece 6 </ b> A in the slip prevention piece insertion hole 153 is located at the intersection D of the punch insertion hole 152 and the slip prevention piece insertion hole 153. It has been adjusted. Here, a pin or the like is inserted from one of the through holes 651 of the screws 65A and 65B, and the removal prevention piece 6A is moved away from the intersection D between the punch insertion hole 152 and the removal prevention piece insertion hole 153. In this state, the punch 2E is broken and inserted into the punch insertion hole 152. Then, when a pin or the like is pulled out, the removal prevention piece 6A returns to the intersection D of the punch insertion hole 152 and the removal prevention piece insertion hole 153, and the protrusion 62 of the removal prevention piece 6A breaks through the notch groove 238 of the punch 2E. Engage. Thus, the breakthrough punch 2E is inserted into the punch insertion hole 152 of the slider main body 120E so as to be parallel to the moving direction (X direction) of the cam slider 12E, and is fixed to the slider main body 120E. The break-through punch 2E fixed to the slider body 120E is inserted into one of the through holes 651 of the screws 65A and 65B, and the removal prevention piece 6A is moved to move the punch of the slider body 120E. It can be pulled out from the insertion hole 152.

  The operating principle of the punching apparatus according to the present embodiment is the same as the operating principle of the punching apparatus according to the first embodiment shown in FIGS. 4 (A) and 4 (B).

  The fifth embodiment of the present invention has been described above.

  In the present embodiment, a breakthrough punch 2E is used as a punch, and this breakage punch 2E is directly attached and fixed to the punch mounting surface 126 of the cam slider 12E of the cam unit 1 without using a retainer. For this reason, as in the first embodiment of the present invention, the degree of freedom of the installation position of the breakthrough punch 2E is high, and the size of the punch processing apparatus can be reduced by downsizing the slider 12. Moreover, since it is not necessary to consider the thickness of a retainer, a punching apparatus can be reduced in size.

  Further, in this embodiment, a pin or the like is inserted from one of the through holes 651 of the screws 65A and 65B, and the removal preventing piece 6A is moved, and in this state, it breaks into the punch insertion hole 152 of the slider main body 120E. The breakthrough punch 2E can be fixed to the slider body 120E simply by inserting the punch 2E and pulling out the pin or the like. Further, by inserting a pin or the like from one of the through holes 651 of the screws 65A and 65B and moving the removal preventing piece 6A, the breakage punch 2E can be pulled out from the punch insertion hole 152 of the slider body 120E. it can. For this reason, the tightening / loosening work for attaching / detaching the break-through punch 2E to / from the cam unit 1 becomes unnecessary, and the workability is improved.

<Sixth embodiment>
17A and 17B are a front view (partial cross-sectional view) and a right side view of a punch processing apparatus according to a sixth embodiment of the present invention, and FIG. 18 is a punch processing apparatus shown in FIG. It is II sectional drawing. In the present embodiment, the same components as those in the punch processing apparatus according to the first embodiment shown in FIGS.

  As shown in the drawing, the punching apparatus according to the present embodiment fixes the breakthrough punch 2F, the cam unit 1 that reciprocates the breakthrough punch 2F in the X direction, and the breakthrough punch 2F to the cam unit 1. And a dropout prevention piece 6B. In the present embodiment, the case where one breakthrough punch 2F is provided is shown, but the number of breakthrough punches 2F can be changed as appropriate.

  The cam unit 1 includes a base 11, a cam slider 12 </ b> F, and a cam driver 13. The cam slider 12F is attached to the base 11 so as to be movable in a direction different from the moving direction (Y direction) of the base 11. Specifically, the cam slider 12F includes a slider main body 120F that is held by the base 11 so as to be movable along the sliding surface 112 of the base main body 110, and a spring that biases the slider main body 120F in a direction to push it back to the home position A. 121, and a slide plate 122 attached to the upper surface 1200 of the slider main body 120F so as to come into contact with the sliding surface 112 of the base main body 110. Further, a break-off prevention piece 6B for fixing the break-through punch 2F to the cam unit 1, a spring 64C and a fire screw 65C are provided.

  A through hole 123 through which the guide bar 111 passes is formed in the slider main body 120 </ b> F, whereby the slider main body 120 </ b> F moves along the guide bar 111. The through hole 123 is an area on the opposite side to the one area 124 in the diameter of one area (large diameter area in which the spring 121 is accommodated) 124 which is an area on the spring seat 113 side of the base body 110. The stepped hole is larger than the diameter of the region 125 on the other side.

  The slider main body 120F is formed in a direction perpendicular to the moving direction of the cam slider 12F restricted by the cam driver 13 (in the present embodiment, perpendicular to the X direction), and the punch mounting surface 126 is formed. The punch mounting surface 126 is formed with a punch insertion hole 155 into which the breaking punch 2F is inserted. Further, a bottom side sliding surface 128 on which the sliding surface 130 of the cam driver 13 slides is formed on the bottom surface 1201 of the slider body 120F.

  Further, the slider main body 120F is formed with a removal prevention piece insertion hole 156 having a bottom surface 158 from the side surface 160A of the slider main body 120F so as to partially cross the punch insertion hole 155 (see the intersection E in FIG. 18). ). A female screw portion 157 is formed at the end portion on the side surface 160A side of the removal prevention piece insertion hole 156 so as to be screwed with a screw 65C for pushing the removal prevention piece 6B and the spring 64C into the removal prevention piece insertion hole 156. Yes.

  Further, in the slider main body 120F, a pin is inserted into the slip-off prevention piece insertion hole 156 from the other side face 160B facing the one side face 160A of the slider main body 120F toward the bottom surface 158 of the drop-out prevention piece insertion hole 156. A puller hole 159 having an inner diameter smaller than that of the drop prevention piece insertion hole 156 is formed.

  FIGS. 19A, 19B, and 19C are a front view, a right side view, and a JJ sectional view of the breakthrough punch 2F of the punching apparatus shown in FIG.

  As shown in the figure, the breaking punch 2F includes a cylindrical shaft 21F having one end surface 28 and the other end surface 27, and a blade portion 22 formed integrally and connected to the other end surface 27 of the shaft 21F. And. On the side surface of the shaft body 21F, a notch groove 239 that engages with the removal preventing piece 6B is formed in a direction perpendicular to the axis. This notch groove 239 intersects the punch insertion hole 155 and the removal prevention piece insertion hole 156 when one end face 28 of the shaft 21F of the breaking punch 2F is inserted into the punch insertion hole 155 of the slider body 120F. It is formed at a position that matches part E.

  The drop prevention piece 6B includes a piece body 66 and a spring guide 68 that guides the spring 64C. The top body 66 is formed with a protrusion 67 that engages with a notch groove 239 formed in the shaft 21F of the break punch 2F.

  The removal prevention piece 6B and the spring 64C are inserted into the removal prevention piece insertion hole 156 in this order, and the male screw 65C is screwed into the female screw portion 157. As a result, the spring 64C is pushed into the drop prevention piece insertion hole 156, and the drop prevention piece 6B is pushed against the bottom surface 158 of the drop prevention piece insertion hole 156.

  Here, a pin or the like is inserted into the puller hole 159, and the removal prevention piece 6B is separated from the intersection E (the bottom face 158 of the removal prevention piece insertion hole 156) between the punch insertion hole 155 and the removal prevention piece insertion hole 156. In this state, the punch 2F is inserted into the punch insertion hole 155. Then, when a pin or the like is pulled out, the removal prevention piece 6B returns to the intersection E between the punch insertion hole 155 and the removal prevention piece insertion hole 156, and the projection 67 of the removal prevention piece 6B breaks through to form the notch groove 239 of the punch 2F. Engage. As a result, the breaking punch 2F is inserted into the punch insertion hole 155 of the slider main body 120F and fixed to the slider main body 120F so as to be parallel to the moving direction (X direction) of the cam slider 12F. The breaking punch 2F fixed to the slider body 120F can be pulled out from the punch insertion hole 155 by inserting a pin or the like into the puller hole 159 and moving the removal preventing piece 6B.

  The operating principle of the punching apparatus according to the present embodiment is the same as the operating principle of the punching apparatus according to the first embodiment shown in FIGS. 4 (A) and 4 (B).

  The sixth embodiment of the present invention has been described above.

  In this embodiment, a breakthrough punch 2F is used as a punch, and this breakage punch 2F is directly attached and fixed to the punch mounting surface 126 of the cam slider 12F of the cam unit 1 without using a retainer. For this reason, as in the first embodiment of the present invention, the installation position of the breakthrough punch 2F is high, and the size of the slider 12 can be reduced, so that the punching device can be downsized. Moreover, since it is not necessary to consider the thickness of a retainer, a punching apparatus can be reduced in size.

  Further, in the present embodiment, by inserting a pin or the like into the puller hole 159, moving the drop prevention piece 6B, in this state, inserting the punch 2F into the punch insertion hole 155 and pulling out the pin or the like, The breakthrough punch 2F can be fixed to the slider body 120F. Further, by inserting a pin or the like into the puller hole 159 and moving the removal prevention piece 6B, the breakage punch 2F can be pulled out from the punch insertion hole 155. For this reason, the tightening / loosening work for attaching / detaching the break-through punch 2F to / from the cam unit 1 becomes unnecessary, and the workability is improved.

  In the first to sixth embodiments, the cam sliders 12 </ b> A to 12 </ b> F are moved in different directions with respect to the moving direction of the base 11 using the guide bar 111 attached to the base body 110 as the cam unit 1. The case where it is attached to the base 11 so as to be movable has been described as an example. However, the present invention is not limited to this. For example, a slide keeper that slidably holds the cam sliders 12A to 12F is attached to the base main body 110, and the cam sliders 12A to 12F are different from the moving direction (Y direction) of the base 11 using the slide keeper. It may be attached to the base 11 so as to be movable. Moreover, in said 1st-6th embodiment, you may use the elastic body which has a function equivalent to a spring instead of the springs 51 and 64A-64C, 121. Further, the structure of the cam unit 1 is not limited to the so-called suspension cam structure shown in the first to sixth embodiments, and the cam unit of other structures such as a lower cam, a reverse cam, etc. The present invention is equally applicable.

  In the first to sixth embodiments, the cam unit 1 has been described as having a so-called suspension cam structure. However, the present invention is applicable to cam units having other structures such as a bottom cam and a reverse cam. The same applies.

  1: cam unit, 2A-2F: break punch, 3: drop prevention plate, 4: drop prevention pin, 5: drop prevention ball, 6A, 6B: drop prevention piece, 11: base, 12A-12F: cam slider, 13 : Cam driver, 21A to 21F: Shaft, 22: Blade portion, 24: Tip surface, 25: Projection, 26: Earl, 27: One end surface of shafts 21A to 21F, 28: The other end surface of shaft 21A, 30 : Through-hole, 31: Hexagon socket head cap screw, 32: Corner part, 33: Leg part, 41: Potato screw, 42: Male screw part, 43: Projection part, 44: Tip surface of male screw part 42, 51: Spring , 52: knock pin, 61: top body, 62: protrusion, 63A, 63B: spring guide, 64A to 64C: spring, 65A to 65C: potato screw, 66: top body, 67: protrusion, 68: screw Ring guide, 110: base body, 111: guide bar, 112: sliding surface, 113: spring seat, 120A to 120F: slider body, 121: spring, 122: slide plate, 123: through hole, 126: punch mounting surface 127: Punch insertion hole, 128: Bottom side sliding surface, 129: Screw hole, 130: Sliding surface, 141: Screw hole for punch insertion, 142: Punch insertion hole, 143: Removal prevention pin insertion hole, 144: First female screw portion, 145: second male screw portion, 146: punch insertion hole, 147: drop prevention ball insertion hole, 148: puller hole, 149: ball exposure port, 150: spring accommodating portion, 151: pin Insertion part, 152: punch insertion hole, 153: removal prevention piece insertion hole, 154A, 154B: female screw part, 155: punch insertion hole, 156: removal prevention piece insertion hole, 57: Female thread portion, 158: Bottom surface of the removal prevention piece insertion hole 156, 159: Puller hole, 160A, 160B: Side surface of the slider main body 120E, 220: Blade body, 231: Notch groove, 232: Male screw portion, 233: notch groove, 234: cylindrical portion, 235: notch, 236: recessed portion, 237: recessed portion, 238: notched groove 239: notched groove, 600: work, 610: die, 630: lower die, 651: Potato screw 65A, 65B through hole, 1111, 1112: end of guide bar 111, 1211, 1212: end of spring 121, 1231: bottom of through hole 123

Claims (15)

A punching device for punching a workpiece such as a sheet metal,
With at least one breakthrough punch,
A cam unit for moving the breakthrough punch,
The breakthrough punch is
A columnar punch body having one end surface and the other end surface; and a one-sided end surface of the punch body, the bottom surface being a circle having a diameter smaller than the diameter of the peripheral edge of the one end surface; A cone-shaped protrusion formed to protrude from the bottom to the workpiece,
The cam unit is
A cam slider that holds at least the piercing punch;
The cam slider is
A punch mounting surface;
A punch insertion hole formed on the punch mounting surface,
The breakthrough punch is
The other end face side of the punch body is inserted into the punch insertion hole and fixed to the cam slider. It is a punch processing apparatus of Claim 1, Comprising:
The punch body is
A shaft,
A punching device, comprising: a blade portion formed integrally with the shaft so that the one end surface is a tip surface, and a rounded portion is formed on a peripheral edge of the tip surface. The punching device according to claim 1 or 2,
The cam unit is
Base and
The cam slider attached to the base so as to be movable in a direction different from the moving direction of the base;
And a cam driver that moves the cam slider in a predetermined direction in contact with the cam slider with respect to the movement of the base. A punching device according to any one of claims 1 to 3,
The cam slider is
It further has a screw hole for a bolt formed on the punch mounting surface,
The breakthrough punch is
Having a groove formed in the punch body;
A punching device, wherein a slip prevention plate engaged with the groove is fixed to the cam slider by being bolted to the bolt screw hole. It is a punch processing apparatus of Claim 4, Comprising:
The cam slider is
A plurality of the punch insertion holes are formed on the punch mounting surface,
The drop prevention plate is
A punching device, wherein the punching device is engaged with all the grooves of the punch body of the breakthrough punch respectively inserted into the plurality of punch insertion holes. A punching device according to any one of claims 1 to 3,
A female screw part is formed in the punch insertion hole,
The breakthrough punch is
Having a male thread portion formed on the other end face side of the punch body;
The punch processing apparatus, wherein the male screw portion is fixed to the cam slider by screwing with the female screw portion of the punch insertion hole. It is a punch processing apparatus of Claim 6, Comprising:
The breakthrough punch is
A punching device, further comprising a pair of notch grooves formed in the punch body and gripped by a tightening / loosening tool. A punching device according to any one of claims 1 to 3,
The cam slider is
It further has a removal prevention pin insertion hole connected to the side surface of the punch insertion hole from the surface of the cam slider,
The breakthrough punch is
Having a recess formed in the punch body,
A punching device, wherein the punching device is inserted into the punch insertion hole, and a removal prevention pin is inserted into the removal prevention pin insertion hole and is fixed to the cam slider by fitting into the recess of the punch body. . It is a punch processing apparatus of Claim 8, Comprising:
A female screw part is formed in the removal prevention pin insertion hole,
The drop prevention pin is
It is a bolt having a protrusion formed on the front end and fitting into the recess of the punch main body, and a male screw part screwed into the female screw part of the removal prevention pin insertion hole. Punching machine. A punching device according to any one of claims 1 to 3,
The cam slider is
A slip prevention ball insertion hole that is connected from the surface of the cam slider to the side surface of the punch insertion hole, and has an inner diameter larger than the opening formed in the side surface of the punch insertion hole,
Inserted in the escape prevention ball insertion hole, and a withdrawal prevention ball having a diameter larger than that of the opening;
An elastic body inserted into the escape prevention ball insertion hole so as to urge the escape prevention ball in a direction of pressing against the opening from the escape prevention ball insertion hole side;
The breakthrough punch is
Having a recess formed in the punch body,
The punching device according to claim 1, wherein the escape prevention ball partially protruding from the opening toward the punch insertion hole is fixed to the cam slider by fitting into the recess. It is a punch processing apparatus of Claim 10, Comprising:
The cam slider is
The punch processing apparatus further comprising a puller hole for inserting a pin for pushing the parting prevention ball partially protruding from the opening into the parting hole insertion hole on the punch insertion hole side. A punching device according to any one of claims 1 to 3,
The cam slider is
A piece prevention hole insertion hole that is formed so as to partially cross the punch insertion hole, and that connects the opposing surfaces of the cam slider,
A removal prevention piece inserted into the removal prevention piece insertion hole;
A pair of elastic bodies that urges the removal prevention piece to be pushed from both ends of the removal prevention piece insertion hole so that the removal prevention piece stays at the intersection of the removal prevention piece insertion hole and the punch insertion hole; Further comprising
The breakthrough punch is
Having a groove formed in the punch body;
The removal prevention piece inserted into the punch insertion hole in a state where the removal prevention piece is moved to a position away from the intersection between the removal prevention piece insertion hole and the punch insertion hole, and pushed back to the intersection. A punching device that engages with the groove of the punch body and is fixed to the cam slider. It is a punch processing apparatus of Claim 12, Comprising:
Female screw parts are formed at both ends of the removal prevention piece insertion hole,
By screwing with female screw portions formed at both ends of the removal prevention piece insertion hole, the removal prevention piece and the pair of elastic bodies arranged on both sides of the removal prevention piece are inserted into the removal prevention piece insertion hole. Having a pair of screws to push into,
At least one of the pair of screws is formed with a through hole for inserting a pin for moving the slip-off preventing piece. A punching device according to any one of claims 1 to 3,
The cam slider is
A slip-off prevention piece insertion hole with a bottom surface formed from the surface of the cam slider so as to partially cross the punch insertion hole,
A puller hole connected from the surface opposite to the surface of the cam slider to the bottom surface of the removal prevention piece insertion hole, and an inner diameter smaller than an inner diameter of the removal prevention piece insertion hole;
A removal prevention piece inserted into the insertion hole for the removal prevention piece;
An elastic body inserted into the removal prevention piece insertion hole so as to urge the removal prevention piece in a direction of pressing against the bottom surface of the removal prevention piece insertion hole;
The breakthrough punch is
Having a groove formed in the punch body;
By inserting a pin into the puller hole, the removal prevention piece is inserted into the punch insertion hole in a state of being pushed away from the bottom surface of the removal prevention piece insertion hole, and the pin is inserted from the puller hole. The punching device according to claim 1, wherein the slip-off preventing piece pushed back to the bottom surface by being pulled out engages with the groove formed in the punch body and is fixed to the cam slider. The punching device according to claim 14, wherein
A female screw part is formed at the end of the entrance side of the removal prevention piece insertion hole,
By screwing with a female screw portion formed at an end portion on the inlet side of the removal prevention piece insertion hole, the removal prevention piece is biased in a direction to press against the bottom surface of the removal prevention piece insertion hole. A punching device, comprising: a screw for pushing the elastic body into the bottom surface side of the removal prevention piece insertion hole.

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