JP2020501909A - Stripping equipment for press dies - Google Patents

Abstract

The present invention relates to a stripping apparatus for a press die, and more particularly, to a punching operation using a punch in a press die, wherein the punch and the panel are moved when the punch is moved backward after the punching. The invention has been made to improve the productivity and efficiency of the work by improving the structure of the stripping device which prevents the panel from sticking up by separating. According to the configuration of the present invention, a punch holder (10) including a punch (16) is mounted in front of a press die or cam slider (3), and an elastic member (50) and an elastic member (50) are provided on the front surface of the punch holder (10). A housing (30) having a pressing member (70) therein is mounted and fixed, and is configured to be compressed while accumulating elastic restoring force as the pressing member (70) comes into contact with an object to be punched. An apparatus (100), wherein the stripping apparatus (100) has a pressing member moving portion (31) and an elastic member receiving portion (35) formed continuously from one side to the other side on a cylindrical inner peripheral surface. A support portion (39) having a fixing hole (39a) protrudes from the outer peripheral surface on the other side, and is fixed to the front surface of the punch holder (10) by fastening bolts. 30) and a hole through which the punch (16) passes is formed in the center by being inserted into the elastic member accommodating portion (35) from the other side of the housing (30) and engaging with the step of the pressing member moving portion (31). And a hole through which the punch (16) passes is formed in the center, and is inserted into the elastic member accommodating portion (35), and the movable plate (40) is moved along the elastic member accommodating portion (35). The elastic member (50) which is compressed by being moved by moving the punch (16) is formed at the center, and the inner periphery of the elastic member receiving portion (35) opened from the other side of the housing (30). After being pushed into the surface, a fixing plate (60) bound with the housing (30) by pushing the other end of the housing (30), and a pressing member moving part (31) from one side of the housing (30). ) Slidable And a guide part (71) that is inserted into the movable plate (40) and is in contact with the movable plate (40) is provided on the other side, and a protrusion (72) having a smaller diameter than the guide part (71) is continuously formed so as to protrude to one side. Member (70) formed in the center and formed with a longitudinal pin through hole (73) in the center of which the punch (16) moves, and one end of the inner peripheral surface of the pressing member moving portion (31) And a fixing ring (80) that is detachably coupled to the ring insertion groove (32) formed in the fixing member (80) to prevent the guide portion (71) of the pressing member (70) from moving in one direction. Comprising. [Selection] Figure 3

Description

  The present invention relates to a stripping apparatus for a press die, and more particularly, in a punching operation using a punch in a press die, at the time of retreat movement of the punch after punching, by separating the punch and the panel, a panel is formed. The present invention has been made to improve the productivity and efficiency of work by improving the structure of a stripping device that prevents it from sticking up.

  Generally, the cam unit for a mold is mounted on a press mold so that the work direction of the vertical reciprocating motion can be changed to perform an angular movement. As shown in FIG. A cam slider 3 slidable in the front-rear direction is mounted, a spring hole 6 into which a return spring 5 can be inserted is formed in the cam slider 3, and a cam driver 7 is attached to a lower portion.

  As shown in FIG. 2, the operation process of the cam unit constructed as described above is such that the slide groove 8 on the bottom surface of the cam slider 3 moves along the slide plate 9 on the upper surface of the cam driver 7 as the whole cam base 1 descends. When the guide is moved, the return spring 5 is elastically compressed, the cam slider 3 moves forward, and the punch 16 punches a panel fixedly mounted on the jig 14.

  However, since the conventional cam unit described above is configured to return the punch which has completed the punching operation to the panel product in the opposite direction only by the elastic return force of the return spring, the high tensile strength which has recently increased the tensile strength is used. In the case of a panel such as a steel plate and a panel having a large thickness, frictional resistance between the punch and the panel becomes large, and a problem often occurs in a return movement, so that high-speed punching cannot be performed or a cam slider or a punch is broken. There was a problem.

  Therefore, in order to solve the above problem, the return spring for returning the cam slider is used with an increased elasticity. However, it is difficult to attach and fix the high elasticity spring, and the high elasticity spring is used during operation of the cam unit. There was a problem that safety accidents occurred due to separation by force.

  Also, in the state where the elasticity of the return spring is high, the cam slider must move forward at the moment of collision when it first contacts the cam driver, but due to the elasticity of the return spring, it cannot move forward smoothly. As a result, the vertical force between the contact surfaces is increased even when the cam driver moves forward, and the wear of the contact surfaces is accelerated to shorten the life of the cam device.

  The present invention is to solve the problems of the related art as described above, and the present invention enables a punch and a panel to be more easily separated after a punching operation, and a punch holder and a punch holder on a front surface of the cam slider. It is an object of the present invention to be able to replace a pressing member for pressing a panel even when a punch is mounted and fixed.

  Another object of the present invention is to adjust the laminated structure and the number of the disk springs according to the type of panel, while ensuring the safety of the laminated structure by applying a disk spring, so that the return movement of the cam slider is smooth. It is an object of the present invention to improve the efficiency of the punching operation.

  Still another object of the present invention is to directly mount the punch member on an existing punch holder, to easily install and disassemble the pressing member housed therein, and to improve the convenience of the assembling process and use. It is another object of the present invention to quickly replace a pressing member worn during a punching operation to enhance the efficiency of product production.

In order to solve such a technical problem, the present invention provides:
A punch holder (10) including a punch (16) is mounted in front of a press mold die or cam slider (3), and an elastic member (50) and a pressing member (70) are provided on the front surface of the punch holder (10). A stripping device (100), wherein a housing (30) provided inside is mounted and fixed, and is compressed while accumulating elastic restoring force as the pressing member (70) comes into contact with an object to be punched. hand,
The stripping device (100) comprises:
A pressing member moving section (31) and an elastic member accommodating section (35) are continuously formed from one side to the other side on a cylindrical inner peripheral surface, and a fixing hole (39a) is provided on an outer peripheral surface on the other side. A housing (30) having a support portion (39) protruding therefrom and fixed to a front surface of the punch holder (10) by fastening bolts;
A movable plate which is inserted from the other side of the housing (30) into the elastic member accommodating portion (35) and engages the step portion of the pressing member moving portion (31), and has a hole formed in the center thereof through which the punch (16) passes. 40)
A hole through which the punch (16) passes is formed at the center, is inserted into the elastic member receiving portion (35), and is compressed by the movable plate (40) moving along the elastic member receiving portion (35). An elastic member (50);
A hole through which the punch (16) passes is formed in the center, and after being pushed into the inner peripheral surface of the elastic member receiving portion (35) opened from the other side of the housing (30), the other side of the housing (30) is formed. A fixing plate (60) that is bound to the housing (30) by pushing in the tip,
A guide portion (71) is slidably inserted into the pressing member moving portion (31) from one side of the housing (30), and is provided on the other side with the guide portion (71) in contact with the movable plate (40). A pressing member (72) having a smaller diameter is formed continuously so as to protrude to one side, and a longitudinal pin through hole (73) in which a punch (16) moves is formed in the center. 70)
The guide portion (71) of the pressing member (70) is detachably coupled to a ring insertion groove (32) formed at one end of the inner peripheral surface of the pressing member moving portion (31). A locking ring (80) for preventing movement in one direction.

  Further, a fixing plate insertion groove (36) is formed in the other end of the elastic member receiving portion (35) in a stepped shape, and the fixing plate (60) is pressed into the fixing groove and is attached thereto, and the outer periphery of the fixing plate (60) is mounted. The surface is formed so as to have an inclined surface (61) whose diameter on the other side is smaller than one side inserted into the elastic member accommodating portion (35), and the housing (30) is pushed by pushing the other end of the housing (30). And the fixed plate (60) are united together, or a fixed plate insertion groove (37) having a concave cross section is formed on the inner peripheral surface of the other end of the elastic member receiving portion (35). ), A fixing plate insertion ridge (62) having a convex cross section corresponding to the fixing plate insertion groove (37) is formed on the outer peripheral surface of the fixing plate (60). They are bound together by being pushed inward from the sides in an interference fit manner.

  The pressing member moving portion (31) of the housing (30) is provided with a rotation preventing surface (33), and guides the pressing member (70) that slides along the inner surface of the pressing member moving portion (31). The portion (71) is formed with a rotation preventing surface (71a) corresponding to the rotation preventing surface (33), so that the pressing member (70) slides without rotation.

  According to the present invention, a cam slider for punching a high-tensile panel having a recently increased tensile strength and a panel having a large thickness by further providing a stripping device in the mold cam unit, and Since the punch can be smoothly returned and the panel can be prevented from being attached to the punch in advance, it is possible to prevent the product from malfunctioning or malfunctioning.

  Also, the pressing member can be assembled and used with an existing punch holder, and the pressing member can be easily disassembled and replaced while being mounted on the punch holder, thereby improving the convenience of installation work and improving the efficiency of product production. be able to.

  By applying a disc spring to the elastic member in a laminated structure, it is possible to achieve a higher tensile force than the conventional coil spring method, and secure the safety of the laminated structure of the disc spring by the pressing assembly structure of the fixed plate. However, since the lamination structure and the number of the disk springs can be adjusted depending on the type of the panel, there is an effect that the efficiency of the punching operation of the mold can be improved.

It is a state diagram before operation of the conventional cam unit for dies. It is a state diagram after operation of the conventional cam unit for dies. 1 is an exploded perspective view of a stripping device according to the present invention. 1 is a cross-sectional view of a mold cam unit to which a stripping device according to the present invention is applied. FIG. 4 is a sectional view showing an operation state of the stripping device according to the present invention. FIG. 2 is a sectional view showing an embodiment of the stripping device according to the present invention. FIG. 4 is a sectional view showing another embodiment of the stripping device according to the present invention.

  The stripping apparatus for a press die according to the present invention, in a punching operation using a punch in a press die, when the punch is retracted after the punching, the panel is lifted by separating the punch and the panel. The present invention has been made to improve the productivity and efficiency of the work by improving the structure of the stripping device for preventing such a problem.

  Hereinafter, the features of the stripping apparatus according to the present invention will be understood by examples which describe the configuration of the stripping apparatus in detail with reference to the accompanying drawings.

  First, a stripping device 100 described in the present invention is mounted on a punch holder 10 including a punch 16 in front of a cam slider 3 for a press die, and includes an elastic member 50 and a pressing member 70 inside a housing 30. As the pressing member 70 comes into contact with the panel P and is pushed backward during the punching operation, the elastic member 50 is compressed while accumulating the elastic restoring force. When the punching operation is completed and the cam slider 3 retreats, By pressing the pressing member 70 forward by the elastic restoring force of the elastic member 50, the panel P in contact with the pressing member 70 is prevented from being attached to the punch 16 and raised.

  For this purpose, the stripping apparatus 100 according to the present invention firstly inserts the movable plate 40, the elastic member 50 and the fixed plate 60 into the cylindrical housing 30 in order, and then moves the housing at the position where the fixed plate 60 is inserted. 30 are pushed in and bound together.

  This will be described in detail with reference to FIGS. 3 to 5. In the housing 30, the pressing member moving part 31 and the elastic member housing part 35 are arranged on the inner peripheral surface of the cylinder from the upper part on one side to the lower part on the other side. A support portion 39 having a fixing hole 39a protrudes from the outer peripheral surface on the other side, and is fastened to the front surface of the cam slider 3 via a fixing bolt to be joined thereto.

  Here, since the pressing member moving portion 31 of the housing 30 is connected with a smaller size than the elastic member receiving portion 35, the connecting portion has a stepped surface. The movable plate 40 to be inserted is hung on the stepped surface and is prevented from moving.

  That is, the movable plate 40 has the same outer shape as the elastic member accommodating portion 35, a hole through which the punch 16 passes is formed in the center, and the movable plate 40 is inserted into the elastic member accommodating portion 35 from the other side of the housing 30 to move the pressing member. It is supported on a step surface connected to the portion 31.

  The elastic member 50 has the same outer shape as the elastic member receiving portion 35, applies a dish-shaped disk spring having a hole formed in the center thereof through which the punch 16 passes, and has a laminated structure in which the disk springs face each other. Preferably.

  Here, also in the process of laminating and inserting the disc-shaped disc springs, the disc spring at the tip which contacts the movable plate 40 supports the edge of the movable plate 40 as shown in FIG. The movable plate 40 that slides along the housing 35 is stably supported.

  The fixing plate 60 is formed to have an outer diameter larger than the inner diameter of the elastic member receiving portion 35, has a hole through which the punch 16 passes in the center, and is tightly fitted on the inner peripheral surface of the elastic member receiving portion 35. And the other end of the housing 30 is pushed in so as to be united with the housing.

  Here, holes (no reference numeral) formed in the centers of the movable plate 40, the elastic member 50, and the fixed plate 60 are holes that simply allow the movement of the punch 16 to pass without interfering with the movement thereof. Is omitted.

  To explain an embodiment in which the fixing plate 60 is pushed into the housing 30 and bound together, first, the fixing plate insertion groove 36 is formed in the other end of the elastic member accommodating portion 35 into a step shape, and fixed. The plate 60 is pushed in and mounted. Here, the outer peripheral surface of the fixing plate 60 is formed so as to have an inclined surface 61 whose diameter on the other side is smaller than that on one side inserted into the elastic member accommodating portion 35.

  That is, referring to FIG. 4, the fixed plate 60 having the inclined surface 61 formed to be small from one side to the other side, which is inserted into the elastic member accommodating portion 35, is pushed into the fixed plate insertion groove 36. By pushing one end of the housing 30 into which the inclined surface 61 is pushed in, the inclined surface 61 is applied to the inner peripheral surface of the fixing plate insertion groove 36 to be united.

  Further, another embodiment in which the fixing plate 60 is pushed into the housing 30 and bound together will be described. As shown in FIG. 6, the inner peripheral surface of the other end of the elastic member accommodating portion 35 has a concave cross section. A fixing plate insertion groove 37 is formed, and a fixing plate insertion protrusion 62 having a convex cross section corresponding to the fixing plate insertion groove 37 is formed on the outer peripheral surface of the fixing plate 60, and the fixing plate 60 is accommodated by an elastic member. The present invention also includes a structure in which the members are pressed into the inside of the portion 35 by an interference fit method and bound together.

  The elastic member receiving portion 35 is processed so that the distal end of the fixed plate insertion groove 37 is widened outward, and then the fixed plate 60 is inserted into the fixed plate insertion groove 37. It is preferable that the protrusions 62 are positioned, and one side of the housing 30 is pushed in to form a concave and convex connection, thereby uniting the housing 30 integrally.

  Here, the fixing plate insertion groove 37 and the fixing plate insertion protrusion 62 can be formed in various shapes such as a “U” cross section or a “V” cross section. When the movable plate 40 and the elastic member 50 are housed in the elastic member accommodating portion 35 of the housing 30, the fixed plate 60 is pushed into the housing 30, and then the end portion is pushed in to integrally form the movable plate 40. It is important that the 40 and the elastic member 50 are not separated.

  As described above, in a state where the movable plate 40 and the elastic member 50 are inserted into the elastic member storage portion 35 of the housing 30 and supported by the fixed plate 60, the pressing member moving portion 31 communicating with the elastic member storage portion 35 is formed. After the pressing member 70 is inserted so as to be slidable along, the fixing member 80 is attached to the distal end of the pressing member moving portion 31 to prevent the pressing member 70 from being separated.

  The pressing member 70 is formed with a pin through hole 73 in the longitudinal direction in which the punch 16 moves in the center, and is slidably inserted into the pressing member moving part 31 from one side of the housing 30 to contact the movable plate 40. The contacting guide portion 71 and the projecting portion 72 having a smaller diameter than the guide portion 71 are integrally formed. The protruding portion 72 is formed to protrude outward from the pressing member moving portion 31.

  That is, in the initial state in which the guide portion 71 of the pressing member 70 is inserted into the pressing member moving portion 31 of the housing 30 and is supported by the movable plate 40, the guide portion 71 is prevented from being detached. A ring insertion groove 32 is formed on the inner peripheral surface of the pressing member moving portion 31 at the front position of the fixing member 80 so that a fixing ring 80 having an inner diameter smaller than the outer diameter of the guide portion 71 can be detachably attached to the ring insertion groove 32. By being connected, the guide portion 71 of the pressing member 70 can be prevented from being separated in one side direction by being engaged with the fixing ring 80.

  The rotation preventing surface 33 is protruded from the pressing member moving portion 31 of the housing 30. The guide portion 71 of the pressing member 70 that slides along the inner surface of the pressing member moving portion 31 has the rotation preventing surface 33. By forming the corresponding rotation preventing surface 71a, only sliding movement is possible in a state where the pressing member 70 is inserted.

  In addition, a tool insertion groove 34 communicating with the ring insertion groove 32 is further formed on an outer surface of the housing 30 having the pressing member moving portion 31, and a tool is inserted through the tool insertion groove 34 to insert a ring. By lifting the fixing ring 80 attached to the mating groove 32, the fixing ring can be easily separated.

  Although the fixing ring 80 is formed in a circular cross section in this embodiment, a general snap ring 81 can be used as shown in FIG. In this case, the ring insertion groove 32 having a rectangular cross section is formed so as to correspond to the shape of the snap ring 81.

  An embodiment of the stripping apparatus 100 according to the present invention will be described with reference to FIGS. 4 and 5. First, the support portion 39 of the housing 30 is attached to the punch holder 10 having the punch 16 by fixing bolts. Are fixed to the punch holder 10 through the fixing holes 39a.

  Here, the punch 16 penetrates through the fixed plate 60, the elastic member 50, and the movable plate 40 of the housing 30, and is located inside the pin through hole 73 of the pressing member 70, and the punch holder 10 is moved forward for punching work. When the panel P moves, the protruding portion 72 of the pressing member 70 comes into contact with the panel P first.

  If the punch holder 10 moves further forward, as the protrusion 72 of the pressing member 70 is pushed rearward by the panel P, the pressing member 70 presses the movable plate 40, and the elastic member 50 becomes elastic. The punch 16 which is compressed while accumulating the restoring force and located inside the pin through-hole 73 protrudes outside to perform a punching operation on the panel P.

  Thereafter, when the punching operation is completed, the compressed elastic member 50 pushes the pressing member 70 forward as the punch holder 10 and the housing 30 coupled to the cam slider 3 retreat and move to the initial state. become.

  That is, while the movable plate 40 is moved forward by the elastic force of the elastic member 50, the guide portion 71 of the pressing member 70 is slid and moved. Will be blocked.

  Therefore, when the cam slider 3 moves backward after the punching operation, the pressing member 70 pushes the panel P, which is attached due to friction with the punch 16, forward, so that the panel can be separated stably.

  The pressing member 70 that contacts the panel as described above forms the protrusion 72 from a metal material that is softer than the panel in order to prevent damage to the panel. If the punching operation is performed for a long period of time, the protruding portion 72 will be worn out.

  For the replacement work, first, the cam slider 3 is moved backward so that the protruding portion 72 of the pressing member 70 protrudes forward of the housing 30, and then the cam slider 3 is mounted on the ring insertion groove 32 using a separate tool. The separated fixing ring 80 is separated.

  As a result, the guide portion 71 of the pressing member 70 slides forward along the pressing member moving portion 31 and is separated from the housing 30, and the guide portion 71 of the new pressing member 70 is inserted along the pressing member moving portion 31. After that, the replacement work is simply completed by attaching the fixing ring 80 to the ring insertion groove 32.

As described above, the above-described embodiment describes the best embodiment of the present invention. However, the present invention is not limited to only the above-described embodiment, and various examples may be provided without departing from the technical idea of the present invention. Variations will be apparent to those skilled in the art.

Claims (4)

A punch holder (10) including a punch (16) is mounted in front of a press mold die or cam slider (3), and an elastic member (50) and a pressing member (70) are provided on the front surface of the punch holder (10). A stripping device (100), wherein a housing (30) provided inside is mounted and fixed, and is compressed while accumulating elastic restoring force as the pressing member (70) comes into contact with an object to be punched. hand,
The stripping device (100) comprises:
A pressing member moving section (31) and an elastic member accommodating section (35) are continuously formed from one side to the other side on a cylindrical inner peripheral surface, and a fixing hole (39a) is provided on an outer peripheral surface on the other side. A housing (30) having a support portion (39) protruding therefrom and fixed to a front surface of the punch holder (10) by fastening bolts;
A movable plate which is inserted from the other side of the housing (30) into the elastic member accommodating portion (35) and engages the step portion of the pressing member moving portion (31), and has a hole formed in the center thereof through which the punch (16) passes. 40)
A hole through which the punch (16) passes is formed at the center, is inserted into the elastic member receiving portion (35), and is compressed by the movable plate (40) moving along the elastic member receiving portion (35). An elastic member (50);
A hole through which the punch (16) passes is formed in the center, and after being pushed into the inner peripheral surface of the elastic member receiving portion (35) opened from the other side of the housing (30), the other side of the housing (30) is formed. A fixing plate (60) that is bound to the housing (30) by pushing in the tip,
A guide portion (71) is slidably inserted into the pressing member moving portion (31) from one side of the housing (30), and is provided on the other side with the guide portion (71) in contact with the movable plate (40). A pressing member (72) having a smaller diameter is formed continuously so as to protrude to one side, and a longitudinal pin through hole (73) in which a punch (16) moves is formed in the center. 70)
The guide portion (71) of the pressing member (70) is detachably coupled to a ring insertion groove (32) formed at one end of the inner peripheral surface of the pressing member moving portion (31). A fixing ring (80) for preventing movement in one side direction, the stripping device for a press die.   At the other end of the elastic member receiving portion (35), a fixing plate insertion groove (36) is formed in a step-like shape, and the fixing plate (60) is pushed into the fixing groove, and the outer peripheral surface of the fixing plate (60) is It is formed so as to have an inclined surface (61) whose diameter on the other side is smaller than one side inserted into the elastic member accommodating portion (35), and is fixed to the housing (30) by pushing the other end of the housing (30). The stripping device according to claim 1, characterized in that the plates (60) are united together.   A fixing plate insertion groove (37) having a concave cross section is formed on the inner peripheral surface of the other end of the elastic member receiving portion (35), and the fixing plate insertion groove (37) is formed on the outer peripheral surface of the fixing plate (60). A fixing plate insertion ridge (62) having a convex cross section corresponding to the above is formed, and the fixing plate (60) is pushed inward from the other side of the elastic member receiving portion (35) by an interference fit method to each other by being pressed into each other. The stripping device for a press die according to claim 1, wherein the device is bound and fixed. A rotation preventing surface (33) protrudes from the pressing member moving portion (31) of the housing (30), and a guide portion () of the pressing member (70) that slides along the inner surface of the pressing member moving portion (31). The rotation preventing surface (71a) corresponding to the rotation prevention surface (33) is formed on the rotation prevention surface (71) so that the pressing member (70) slides without rotation. The stripping apparatus for a press die according to claim 1.