JP5183869B2 - Punch mold and mold used for chamfering method - Google Patents

Description

The present invention is, for example, when performing processing of a plate-shaped workpiece in a punch press such as such as a turret punch press, the punch used for chamfering how to perform chamfering the end face of the product relates to a mold, a more detailed The present invention relates to a punch die and a die that can perform chamfering accurately even when the plate thickness of the workpiece is relatively large and the lateral component force is large during chamfering.

Conventionally, for example, a chamfering process is sometimes performed on an end surface of a plate-like workpiece using a punch press such as a turret punch press (see Patent Document 1).
Japanese Utility Model Publication No. 1-153814

  The configuration of the mold described in Patent Document 1 is the configuration as shown in FIG. That is, the punch die 1 as an upper die shown in FIG. 11 is configured such that a cylindrical punch guide 7 is movable up and down via a lifter spring 5 to a punch holder 3 corresponding to an upper turret in a turret punch press, for example. It is supported. A punch body 9 is fitted in the punch guide 7 so as to be movable up and down. Between a punch head 11 screwed to the upper end portion of the punch body 9 and a retainer collar 13 attached to the upper portion of the punch body 9. Is equipped with a powerful stripper spring 15. A tapered surface 17 for chamfering the edge of the plate-like workpiece W is formed at the lower end of the punch body 9.

  A die 19 as a lower die facing the punch die 1 as an upper die is mounted on a die holder 21 corresponding to a lower turret in a turret punch press, for example. This die 19 is configured as a blind die having a flat upper surface.

  In the above configuration, when the edge of the workpiece W is positioned on the die 19 and the punch head 11 is struck and lowered by the striker 23 provided to the punch press so as to be movable up and down, the lifter spring 5 is first compressed, and the punch guide 7 descends, and the work W is pressed and fixed to the die 19 by the lower surface of the punch guide 7. Thereafter, when the striker 23 is further lowered, the punch body 9 is lowered against the urging force of the stripper spring 15. Then, by pressing the tapered surface 17 provided at the lower end portion of the punch body against the edge of the workpiece W, the edge of the workpiece W is deformed by the tapered surface 17.

  The operation as described above is repeated, and the edge of the workpiece W is chamfered by continuously deforming the tapered surface 17 on the edge of the workpiece W.

  In the configuration shown in FIG. 12, a taper surface 17 is formed on the lower end surface of the punch guide 7, and the punch guide 7 is urged under pressure by the urging force of the stripper spring 15. Chamfering is performed. In this configuration, since the chamfering process is performed using the urging force of the stripper spring 15, it is difficult to obtain a large pressing force when pressurizing the edge of the work W. When the work W becomes thicker, There is a problem that accurate chamfering cannot be performed only by crushing the work edge.

  Further, in the conventional configuration, a lateral force acts on the punch body or the punch guide due to a component force when chamfering is performed on the workpiece edge portion, and there is a tendency to relatively escape from the workpiece. Therefore, when the workpiece becomes thick, there is a problem that accurate chamfering cannot be performed and a galling phenomenon sometimes occurs.

The present invention has been made in view of the conventional problems as described above, and is therefore a punch die for chamfering a plate-like workpiece, and is a cylindrical punch supported by a punch press so as to be movable up and down. A chamfering blade portion is provided at the lower end portion of the punch body provided in the guide so as to be movable up and down , and the chamfering blade portion has a tip formed at an acute angle in order to drive the chamfering blade portion onto the upper surface of the workpiece, and In order to cancel the lateral force acting on the workpiece against each other, both sides have inclined surfaces and the cross-sectional shape is substantially triangular, and the punch body has a predetermined length in the radial direction. it is provided with, at a position close to the chamfered edge portion, and is characterized in that it comprises a plate-like lateral movement restricting member that protrudes downward than the chamfer edge portion.

  Further, in the punch die, the inclined surfaces on both ends in the longitudinal direction of the chamfered blade portion and on the opposite side of the lateral movement restricting member are formed so that both ends are slightly higher. Is.

A die for chamfering a plate-shaped workpiece, comprising a punch die and a die die, the punch die being a cylindrical punch supported by a punch press so as to be movable up and down. A chamfering blade portion is provided at the lower end portion of the punch body provided in the guide so as to be movable up and down , and the chamfering blade portion has a tip formed at an acute angle in order to drive the chamfering blade portion onto the upper surface of the workpiece, and In order to cancel the lateral force acting on the workpiece against each other, both sides have inclined surfaces and the cross-sectional shape is substantially triangular, and the punch body has a predetermined length in the radial direction. The die mold includes an ejector plate that is movable up and down with respect to the die body and biased upward, and a chamfering blade portion that is substantially symmetrical to the chamfering blade portion with respect to the ejector plate. phase And it is characterized in that it comprises the manner the die body so as to be protruded upward.

In addition, a punch die for chamfering a plate-like workpiece, on a lower end portion of a punch body provided in a cylindrical punch guide supported by a punch press so as to be movable up and down. characterized in that it comprises in parallel a predetermined length of the distal end portion is formed at an acute angle with the inclined surface on both sides of the chamfered edge portion of a pair that Teisu substantially triangular cross-sectional shape in the radial direction of the punch body It is what.

  According to the present invention, when chamfering is performed on the end face of the workpiece, the component force acting on the punch is canceled out, so that the chamfering can be easily performed even when the plate thickness of the workpiece is large. Is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Since the overall configuration of the mold is the same as the conventional configuration described above, the same reference numerals are given to components having the same functions. Thus, duplicate explanations are omitted.

  Referring to FIG. 1, the overall configuration of the punch die in this embodiment is the same as that of the conventional punch die described above, and the punch body 9 can be moved up and down in a cylindrical punch guide 7. This is a configuration prepared for. At the lower end portion of the punch body 9, a chamfered blade portion 27 having a tip portion formed at an acute angle and inclined surfaces 25A, 25B on both sides and having a substantially triangular cross-section is provided in the radial direction of the punch body 9 (in FIG. 1). A predetermined length is formed in a direction perpendicular to the paper surface. A plate-like lateral movement restricting member 29 protruding downward from the chamfering blade part 27 is provided at a position close to the chamfering blade part 27. The lateral movement regulating member 29 is provided long in parallel with the chamfered blade portion 27.

  In the inclined surface 25B on the opposite side (product side) of the chamfered blade portion 27 to the lateral movement regulating member 29, both end portions in the longitudinal direction (portions indicated by hatching in FIG. 2B) are gradually higher at both end portions. As shown, it is formed slightly higher. In addition, although the said inclined surfaces 25A and 25B are illustrated by the plane, you may form in an arc-shaped curved surface, for example, without restricting to a plane. That is, a curved surface corresponding to the shape of the chamfered portion may be used.

  The upper surface of the die 31 corresponding to the punch die is formed into a flat surface, and the die 31 is formed with an engagement hole 33 through which the lateral movement restricting member 29 can be engaged and disengaged.

  FIG. 3 shows a thick plate product 37 in which chamfered portions 35 are processed on both side surfaces. In order to shear and separate the product 37 from the plate-like workpiece W using the punch die and the die 31, as shown in FIG. 4, a portion 37A (hereinafter referred to as a product portion) of the workpiece W is a product. In parallel with the contour portion, space portions (hereinafter referred to as long grooves or long holes) 39A, 39B, 39C such as long grooves or long holes are formed. In the example shown in FIG. 4, since the case where the product portion 37A is separated from one end of the workpiece W is illustrated, the case where the long grooves 39A, 39B and the long holes 39C are formed in the three directions of the product portion 37A. Illustrated. The long grooves 39A and 39B and the long holes 39C are processed by a general nibbling process or a passing process as a punch press process.

  In the above configuration, since the portions corresponding to the chamfered portion 35 of the product 37 are the long grooves 39A and 39B, the long grooves 39A and 39B are necessary for processing the chamfered portion 35, but the long hole 39C is not necessarily required. Is. Further, when the product portion 37A is formed at the corner of the workpiece W, there is a space in advance on one side of the product portion 37A, so that the long groove 39A or the long groove 39B can be omitted.

  As described above, the long grooves 39A and 39B are formed in advance in parallel with the contour portion of the product portion 37A to be the chamfered portion 35 of the product 37, and then the chamfered portion 35 is processed using the punch die and the die 31. 1 positions the workpiece W on the die 31 as shown in FIG. The lateral movement restricting member 29 provided in the punch body 9 is engaged with the engagement hole 33 of the die 31 through the long hole 39A of the workpiece W, and the tip portion of the chamfering blade portion 27 is moved to the product portion 37A. Type in the contours of That is, it processes so that the chamfering blade part 27 may be inserted on the line L1 (refer FIG. 4) which processes the chamfering part 35. FIG.

  When the tip of the chamfered blade portion 27 is driven into the workpiece W as described above, the chamfered portion 35 is processed by the inclined surface 25B on the product portion 37A side of the chamfered blade portion 27 as shown in FIG. At this time, the portion on the long groove 39A side from the line L1 is pressed and moved to the long groove (space portion) 39A side by the inclined surface 25A of the chamfered blade portion 27 to form a relief portion 41 (see FIG. 5). .

  As described above, when the chamfering blade portion 27 is driven into the workpiece W, when the tip end portion of the chamfering blade portion 27 comes into contact with the upper surface (surface) of the workpiece W and is gradually driven, each inclination of the chamfering blade portion 27 is increased. A component force in the left-right direction in FIG. 1 acts on the surfaces 25A and 25B. Since the left and right component forces acting on the inclined surfaces 25A and 25B are in opposite directions, they cancel each other. However, since the relief portion 41 is adjacent to the long groove 39A, the relief portion 41 easily moves to the long groove 39A side (left side in FIG. 1). Therefore, the chamfered blade portion 27 tends to move to the left in FIG. 1 due to the reaction force of the lateral component acting on the inclined surface 25B.

  However, since the lateral movement restricting member 29 is engaged with the engagement hole 33 of the die 31, the chamfering blade portion 27 does not move in the left-right direction (lateral direction), and is accurately detected by the inclined surface 25B. Chamfering is performed. The chamfering process can be performed over the entire length of the portion corresponding to the long groove 39A of the product portion 37A by sequentially moving the above-described processing along the line L1. At this time, since the both end sides of the inclined surface 25B are formed so as to be slightly higher, the portions that are plastically deformed by the both end portions of the inclined surface 25B can be suppressed to be small, and the processed portion when chamfering is sequentially performed is reduced. The appearance of the connection part can be improved.

  Thereafter, the direction of the workpiece W or the punch die and the die 31 is reversed, or the same processing is performed on the line L2 portion along the long groove 39B using a punch die and die having a symmetrical configuration. Is. Then, when the relief portion 41 generated by chamfering along the lines L1 and L2 is cut and removed by a general punching die, a state as shown in FIG. 6 is obtained. Thereafter, the product 37 shown in FIG. 3 is obtained by cutting the connection portion between the workpiece W and the product portion 37A.

  As understood from the above description, when the chamfered blade portion 27 is driven into the contour portion of the product portion 37A to process the chamfered portion 35, the chamfered blade portion 27 is interposed between the chamfered blade portion 27 and the opposite side of the chamfered portion 35. Since the relief portion 41 is formed to offset the horizontal component force acting on the chamfered blade portion 27, the thickness of the workpiece W is large and the component force is large. However, the chamfering can be easily and accurately performed.

  FIG. 7 shows a second embodiment of a mold for chamfering a plate-like workpiece. This die includes a punch die and a die die, and the punch die is provided with a chamfering blade portion 27 on the upper surface at the lower end portion of the punch body 9 provided in the punch guide 7 so as to be movable up and down. This is a configuration provided.

  The die mold includes an ejector plate 45 that is movable up and down with respect to the die body 43 and biased upward. That is, a stripper bolt 47 is suspended from the lower portion of the die body 43, and a stripper spring 47 is interposed between a spring seat 49 supported on the head of the stripper bolt 47 and a movable ring 51 that can move up and down. An elastic member 53 such as A lower end portion of a pin 55 penetrating the die main body 43 so as to be movable up and down and connecting an upper end portion to the ejector plate 45 is in contact with the upper surface of the movable ring 51. Therefore, the ejector plate 45 is urged upward by the elastic member 53.

  The die body 43 is provided with a lower chamfered blade portion 57 that can protrude upward relative to the ejector plate 45. The chamfered blade portion 57 is configured symmetrically with the upper chamfered blade portion 27 provided in the punch body 9.

  With the above configuration, the mold according to the second embodiment can achieve the same effects as those of the above-described embodiment, and can simultaneously perform chamfering on the upper and lower surfaces of the workpiece.

  FIG. 8 shows a mold according to the third embodiment. In the mold according to this embodiment, a pair of chamfering blade portions 59A and 59B having the same configuration as the chamfering blade portion 27 are provided in parallel at the lower end portion of the punch body 9 provided in the punch guide 7 so as to be movable up and down. It is a configuration.

  In order to perform chamfering on the workpiece W using the above mold, as shown in FIG. 9A, a long groove or long hole 61 having a narrower width than the distance between the pair of chamfering blade portions 59A and 59B is usually used. It is formed by overtaking mold. Next, when the chamfered blade portions 59A and 59B are positioned so as to be positioned on both sides of the long hole 61 and driven into the workpiece W, the chamfered portions are formed on both sides of the long hole 61 as shown in FIG. 63 is processed and the relief portion 65 is moved inward. Thereafter, when the relief portion 65 is punched and removed by a general punching die, a product having a long hole 61 in which chamfered portions 63 are processed on both sides is obtained as shown in FIG. 9 (C). It is.

  As can be understood from the above description, this embodiment can achieve the same effects as those of the above-described embodiment, and the chamfered portions 63 are simultaneously processed in the contour portion of the long hole 61, that is, on both sides of the long hole 61. Is.

  FIG. 10 shows a mold according to the fourth embodiment. In the same configuration as the mold shown in FIG. 7, a pair of punch blades are respectively provided at the lower end portion of the punch body 9 and the upper end portion of the die body 43. It is the structure provided with the parts 59A and 59B. According to this structure, the chamfered portions 63 can be processed on both sides of the upper and lower surfaces of the long hole 61.

  As will be understood from the above description, the chamfered portion is processed at the same time as the relief portion is formed in the contour portion of the product portion 37A of the workpiece W, so that the horizontal direction when the chamfered portion is processed is changed. The chamfering process can be performed while suppressing the movement of the punch by the component force, and the chamfered part can be easily and accurately machined even when the workpiece has a plate thickness.

It is explanatory drawing of the principal part of the metal mold | die which concerns on the 1st Embodiment of this invention. It is detailed explanatory drawing of the chamfering blade part in the said metal mold | die. It is explanatory drawing which shows an example of the product provided with the chamfering part. It is process explanatory drawing which processes a product. It is process explanatory drawing which processes a product. It is process explanatory drawing which processes a product. It is explanatory drawing of the metal mold | die which concerns on 2nd Embodiment. It is explanatory drawing of the metal mold | die which concerns on 3rd Embodiment. It is explanatory drawing of the chamfering process by the metal mold | die of 3rd Embodiment. It is explanatory drawing of the metal mold | die which concerns on 4th Embodiment. It is explanatory drawing which shows the structure of the conventional metal mold | die. It is explanatory drawing which shows the structure of the conventional metal mold | die.

Explanation of symbols

7 Punch guide 9 Punch body 25A, 25B Inclined surface 27, 57, 59A, 59B Chamfering blade part 29 Lateral movement restricting member 31 Die 33 Engagement hole 35, 63 Chamfered part 37 Product 37A Product part 39A, 39B, 39C Space part ( Long groove)
41, 65 Escape portion 61 Long hole (long groove)

Claims (4)

A punch die for chamfering a plate-shaped workpiece, and a chamfering blade portion at a lower end portion of a punch body which is vertically movable in a cylindrical punch guide supported vertically by a punch press. The chamfering blade portion is formed with an acute angle at the tip portion so as to drive the chamfering blade portion onto the upper surface of the workpiece, and the lateral component forces acting when the workpiece is driven against each other cancel each other out. The chamfering blade is provided with an inclined surface on both sides, and the cross-sectional shape is substantially triangular, and is provided in a predetermined length in the radial direction of the punch body. A punch die having a plate-like lateral movement restricting member protruding downward from the portion.   2. The punch die according to claim 1, wherein the inclined surfaces on both ends in the longitudinal direction of the chamfered blade portion and on the opposite side of the lateral movement restricting member are formed so that both ends are slightly higher. Features a punch mold. A die for chamfering a plate-like workpiece, comprising a punch die and a die die, and the punch die is provided in a cylindrical punch guide supported by a punch press so as to be movable up and down. The punch body is provided with a chamfering blade at the lower end of the punch body, and the chamfering blade is formed at an acute angle to drive the chamfering blade into the upper surface of the workpiece. The structure is provided with inclined surfaces on both sides and having a substantially triangular cross-section so that the lateral component forces acting at the time of driving cancel each other out, and is provided in a predetermined length in the radial direction of the punch body. The die mold includes an ejector plate that is movable up and down with respect to the die body and is urged upward, and a chamfering blade portion that is substantially symmetrical with the chamfering blade portion is relative to the ejector plate. In Mold, characterized in that it comprises the die body so as to be projected in a direction.   A punch die for chamfering a plate-shaped workpiece, and a tip end portion at a lower end portion of a punch body provided in a cylindrical punch guide supported by a punch press so as to be movable up and down. A punch metal comprising a pair of chamfering blade portions that are formed at an acute angle and have inclined surfaces on both sides and have a substantially triangular cross-sectional shape in parallel with a predetermined length in the radial direction of the punch body. Type.

Images