JP5007110B2 - Mold - Google Patents

Description

The present invention relates to a punch and die and a die mold for half die cutting a connecting portion connecting the workpiece and the products as a material, and more particularly, the products with respect to the material The present invention relates to a die having a punch die and a die die that can accurately perform half-cutting without damaging a product even when a slight change (variation) occurs in the connection state.

  Conventionally, when a product is punched by a punch press such as a turret punch press, for example, as shown in FIG. 4, a plate-shaped workpiece as a material is provided by a work clamp 103 provided in a carriage 101 in the punch press (not shown). W is gripped, and the carriage 101 is moved in the X and Y axis directions with respect to the machining position in the punch press, and the workpiece W is positioned with respect to the machining position.

  Then, a continuous punching hole 105 is processed by performing a punching process around the product WB by a punching die (not shown) provided for the punch press. When the additional hole 105 is processed, in order to separate the product WB from the workpiece W in a subsequent process, a part of the connecting portion 107 connecting the workpiece W and the product WB is left.

  Incidentally, micro-joint processing is performed as processing for leaving a connection portion that connects the workpiece W and the product WB. Since the micro joint processing is configured to connect the workpiece W and the product WB through a fine connecting portion, the product may sometimes be detached from the workpiece during the processing of the workpiece W. In the portion, after the product is separated from the workpiece, a trace of a fine connection portion remains, and this trace of the connection portion is difficult to remove even in the deburring process.

  Therefore, the width of the connecting portion 107 is formed to be as large as several millimeters so that the burr can be removed by deburring. As described above, when the width of the connecting portion 107 is large, it is difficult to separate the product WB from the workpiece W. Therefore, the connecting portion 107 is half-punched so that the separating operation can be easily performed. Has been done. That is, as shown in FIG. 5, the connecting portion 107 is punched to about t / 2 of the plate thickness t of the product WB (half blanking; sometimes referred to as half shear joint machining). It has been broken.

In addition, there exists patent document 1 as a prior example regarding a half shear joint process, and there exists patent document 2 as a prior example of the metal mold | die considered to be related to this invention.
JP 2004-98128 A JP 2000-288647 A

  As described above, in the configuration in which the workpiece W as a material and the product WB are connected by the plurality of connecting portions 107, distortion at the time of punching the workpiece W and rubbing when the workpiece W is moved in the X and Y axis directions. The connection portion 107 may be distorted due to vibration or the like, and the positional relationship of the product WB with respect to the workpiece W may be shifted. Accordingly, when half-cutting the connecting portion 107, a part of the product may be damaged.

  Therefore, a punch guide pin (13) provided on both sides of a punch tip (indicated by reference numeral 7 in Patent Document 2) in the additional die is used using the additional die described in Patent Document 2. It is also conceivable that after the workpiece is guided by engaging with the additional hole 105 shown in FIG. 4, the punching of the connecting portion 107 is supplemented with the punch tip (same as 7).

  However, since the punching die and the guide pin are separate and movable relative to each other, the structure of the punching die is complicated and a slight positional deviation occurs between the guide pin and the punch tip. Therefore, there is a problem in performing the half-punching of the connecting portion 107 with higher accuracy, and it is difficult to apply it as it is.

The present invention has been made in view of the above-described problems, and is a die for half-cutting a connection portion connecting a material and a product, and is provided with a punch body that can be moved up and down in a punch guide. A gate-shaped half-punched portion at the lower end of the gate-shaped portion, a guide protrusion provided on both sides of the portal-shaped recess, and a guide contact surface that can contact the product. A punch die for half punching provided with a blade portion for half punching the connecting portion on the same side as the guide contact surface, and provided in the die body so as to be vertically movable and urged upward. For the half-punching process, the ejector is provided with a protrusion that can be engaged with the recess provided in the punch mold, and the ejector is provided with a punching piece passage portion through which the punching piece can pass on both sides of the protrusion. Having a die mold, It is an butterfly.

  According to the present invention, when the connecting portion connecting the material and the product is engaged with the concave portion in the half-punched portion of the portal shape provided at the lower end portion of the punch body, the guide protrusions are formed on both sides of the concave portion. In the state in which the guide contact surface provided in the guide projecting portion comes into contact with the product, the connecting portion is half-punched by the blade portion provided in the concave portion. That is, since the guide contact surface provided in the guide protrusion and the blade are formed on the same plane, the connecting portion can be half-punched without damaging the product.

  Referring to FIG. 1, a punch die 1 for half punching according to an embodiment of the present invention is provided with a cylindrical punch guide 3 as in a normal general punch die, and this punch guide. 3, a punch body 5 is provided so as to be movable up and down. A punch head 7 is attached to an upper end portion of the punch body 5 protruding upward from the punch guide 3, and a stripper is provided between the punch head 7 and an annular retainer 9 provided on the upper portion of the punch guide 3. A strong elastic member 11 such as a spring is elastically mounted. Since the overall configuration of the punch die 1 is the same as that of a general punch die, a more detailed description of the configuration of the punch die 1 is omitted.

  At the lower end of the punch body 5, a portal-shaped half-punched portion 13 is provided that can protrude downward from the punch guide 3. More specifically, as shown in FIG. 1, the half-punched portion 13 is formed by forming a concave portion 15 that opens downward and in the front-rear direction (a direction perpendicular to the paper surface in FIG. 1) in the center portion. With the structure provided with the guide protrusions 17 protruding downward on both sides of the recess 15, it is formed so as to exhibit a gate shape as shown in FIG. 1 when viewed from the front.

  The half punching portion 13 is formed in a flat and substantially square shape so that it enters the above-described additional hole 105 and fits into a die hole 35 of a die mold 27 described later ( (See FIG. 2B). Further, one side surface of the both guide projecting portions 17 is formed on a guide contact surface 19 that can come into contact with one side end surface of the product WB when the half punching portion 13 is inserted into the additional hole 105. A blade portion 21 is formed in the same plane as the guide contact surface 19 on the guide contact surface 19 side of the upper surface of the recessed portion 15 in the half-punched portion 13, and the upper surface of the recessed portion 15 corresponds to the blade portion. It forms in the inclined surface 23 inclined so that the side away from 21 may become high (refer FIG. 2 (A)). Further, the peripheral edge of the distal end portion (lower end portion) of the guide protrusion 17 can be easily inserted (fitted) into the additional hole 105 and the die hole 35 as shown in FIGS. As shown in B), an appropriate chamfer 25 is formed.

  The die-cutting die die 27 for cooperating with the punch die 1 includes a die base 29, and a die body 31 is detachably screwed to the die base 29. The die body 31 is formed in a cylindrical shape having an opening on the lower side, and the die hole 35 into which the half punching portion 13 of the punch body 5 can be fitted is formed in the upper wall portion 33 of the die body 31. It is formed.

  An ejector 37 is mounted inside the die body 31 so as to be movable up and down. The ejector 37 is always urged upward by a plurality of elastic members 39 such as springs. An engaging portion 38 engaged with the die hole 35 protrudes upward on the upper surface of the ejector 37, and the connecting portion 107 can be supported from below on the upper surface of the engaging portion 38. An upper protruding portion 41 that can be engaged with the concave portion 15 of the half punched portion 13 is provided.

  The upper surface of the upper projecting portion 41 is generally flush with the upper surface of the die body 31 in a normal state. Further, on both sides of the upper projecting portion 41, punched piece passage portions 43 (see FIG. 3) such as holes and grooves through which a punched piece (punched waste) punched from the work W can pass are formed. A through hole 45 is formed in the die base 29 corresponding to the punched piece passage portion 43.

   As described above, the punching hole provided in the punch press is used to process the punching hole 105 around the product WB so as to separate the product WB from the workpiece W, and the workpiece W and the product WB are connected by the connecting portion 107. In order to perform the half blanking of the connecting portion 107 in the state, it is performed as follows.

  That is, the punch mold 1 and the die mold 27 are positioned at a processing position in the punch press. Then, the workpiece W is moved in the X and Y directions, and the connecting portion 107 is positioned on the upward projecting portion 41 in the die mold 27. Thereafter, the punch die 1 is lowered by a ram (striker) that can move up and down in the punch press, and the half punching portion 13 of the punch body 5 provided in the punch die 1 is formed in the die die 27 in the die hole 35. When the ram is lowered in the middle, that is, at the position where the connecting portion 107 has been half sheared and stopped, the connecting portion 107 is half-punched.

  By the way, as described above, when the half-cutting of the connecting portion 107 is performed, the lower end portion of the guide protrusion 17 of the half-punched portion 13 in the punch body 5 protrudes downward in advance from the lower surface of the punch guide 3. In this case, the lower end portion of the guide protrusion 17 enters the additional hole 105 before the punch guide 3 comes into contact with the workpiece W.

  In the case where the lower end portion of the guide protrusion 17 is substantially the same height as the lower surface of the punch guide 3 or is recessed from the lower surface of the punch guide 3, when the elastic member 11 is slightly compressed, that is, The punch guide 3 is configured so that the lower end portion of the guide protrusion 17 enters the additional hole 105 while the pressing force with which the punch guide 3 presses the workpiece W against the die body 31 is small. The lower end portion of the guide protrusion 17 enters the additional hole 105 before it is firmly pressed against 31.

  As described above, when the guide protrusion 17 of the half punching portion 13 enters the additional extraction hole 105, the chamfered portion 25 is formed at the lower end of the guide protrusion 17. Can be easily guided. When the guide protrusion 17 enters the additional hole 105, the width dimension of the additional hole 105 is substantially equal to the thickness dimension of the half-punched part 13, so that the guide contact surface 19 of the guide protrusion 17 is a product. The contact portion 107 that contacts the one side surface of the WB and connects the workpiece W as the material and the product WB relatively enters the recess 15 in the half punching portion 13. Therefore, the connecting portion 107 is regulated by the recess 15, and the position of one side surface of the product WB is regulated by contacting the guide contact surface 19 of the guide protrusion 17.

  That is, the position where the connecting portion 107 is half-cut by the blade portion 21 provided in the concave portion 15 coincides with one side surface of the product WB. Therefore, even when the positional relationship between the workpiece W as the material and the product WB is slightly misaligned due to the distortion of the connecting portion 107 or the like, the connecting portion is in a state where the distortion is corrected. Thus, the half blanking process 107 is performed, and the half blanking process can be performed without damaging the product WB.

  As described above, when the lower end portion of the guide protrusion 17 in the half-punched portion 13 is inserted into the additional hole 105 of the workpiece W and is in a state of being fitted into the die hole 35, the workpiece W and the product WB The connecting portion 107 is supported from the lower side by the upper projecting portion 41 of the ejector 37 in the die die 27 and enters the concave portion 15 of the half punching portion 13 so that the distortion and the like are corrected. Thereafter, when the punch die 1 is further lowered by the ram, the elastic member 11 is compressed, and the pressing force of the work W by the punch guide 3 is strengthened, and the acting portion is applied to the inclined surface 23 provided in the recess 15. The half-punched portion 13 tends to be pressed toward the product WB by the force, and the half-punch processing of the connecting portion 107 is performed at a position corresponding to one side edge of the product WB. That is, half-cutting of the connecting portion 107 is performed without damaging the product WB.

  By the way, as described above, when the punching process of the connecting part 107 between the workpiece W and the product WB is performed by mistake, the punching piece is generated by punching the connecting part 107 by mistake. Then, the punch passes through the punched piece passage portion 43 formed on the die base 29 and passes through the through hole 45 formed in the die base 29 and is discharged to the outside of the die die 27. Therefore, the punched piece does not get stuck in the die mold 27 and the ejector 37 does not move, and even if the connecting portion 107 is punched by mistake, the half punching process is performed. Is something that can continue.

It is sectional explanatory drawing which shows the state which is performing the half die cutting with the punch metal mold | die and die metal mold | die which concern on embodiment of this invention. It is explanatory drawing which shows the structure of the half punching process part of the front end side of the punch body in a punch metal mold | die. It is plane explanatory drawing of the ejector in a die metal mold | die. It is explanatory drawing which shows the connection state of a workpiece | work and a product. It is explanatory drawing at the time of carrying out the half punching process to the connection part of a workpiece | work and a product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Punch die 3 Punch guide 5 Punch body 13 Half punching part 15 Recessed part 17 Guide protrusion part 19 Guide contact surface 21 Blade part 23 Inclined surface 25 Chamfered part 27 Die die 31 Die body 35 Die hole 37 Ejector 39 Elastic member 41 Upper projection 43 Punching piece passage 45 Through hole

Claims (1)

A die for half-cutting a connection part connecting a material and a product, comprising a half-cut part having a gate shape at the lower end of a punch body provided in a punch guide so as to be movable up and down, Guide protrusions provided on both sides of the gate-shaped recess are provided with guide contact surfaces that can contact the product, and the connection portion is half-cut on the same side as the guide contact surface in the portal-shaped recess. a half blanking punch dies that have a blade portion for, the ejector having biases within the die body to be vertically movable and upwardly, engageable in the recess provided in the punch die A die having a projecting portion, and a die for die-cutting processing having a punched piece passage portion through which the punched piece can pass freely on the ejector on both sides of the projecting portion.

Images