JP2014083556A - Blanking metal-mold and scrap splitting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blanking metal-mold which can suppress catching of a scrap between cutting means.SOLUTION: A blanking metal-mold comprises: first cutting means and second cutting means which are so positioned as to face each other; a scrap cutter which is positioned in a direction crossing the first cutting means and the second cutting means and which splits a scrap remained between the first cutting means and the second cutting means; and deformation means which moves the end portion of the scrap on at least one side of the first cutting means and the second cutting means inwards by performing plastic deformation of the scrap.

Description

  The present invention relates to a blanking die having a scrap cutter and a scrap dividing method.

  Conventionally, in the manufacture of industrial products such as automobile panels, for example, so-called blanking (blanking) is performed in which a plurality of product shape portions are manufactured by punching out the contour shape of a product from a sheet-like workpiece drawn from a roll. Yes. Further, during this blanking, the remaining scrap portion is divided by a scrap cutter.

  For example, in Patent Document 1, while leaving the product-shaped part in the center part of the panel-shaped workpiece, the frame-shaped non-product part region around it is trimmed by the shearing action between the upper and lower trimming cutting edges. A trimming press working apparatus that cuts the non-product part region into a plurality of scrap strips by a shearing action between a cutting blade on the upper mold side and a scrap cutter disposed on the lower mold side. A trimming press working apparatus is described in which a portion close to the trimming cutting blade on the lower die side is cut out to form a relief portion. This escape portion prevents the scrap cut line from being cut twice.

JP 2002-66649 A

  However, contrary to Patent Document 1, when the central part of the panel-shaped workpiece is a non-product part region, when the non-product part region is cut with a scrap cutter, scrap fines are formed between the trimming cutting edges facing each other. The piece may be caught (fitted closely) and may not fall into the scrap discharge opening provided in the lower mold. When the scrap is caught, the trimming press apparatus must be stopped once and the scrap must be dropped manually, which causes a problem that the production efficiency is lowered.

  This invention is made in view of these problems, and makes it a subject to provide the blanking metal mold | die and the scrap division | segmentation method which can suppress that a scrap is caught between cutting means.

  The present invention is arranged such that the first cutting means and the second cutting means arranged at positions facing each other, and the first cutting means and the second cutting means are arranged in a direction intersecting the first cutting means and the second cutting means. A scrap cutter that divides the scrap remaining between the two cutting means, and plastically deforming the scrap, thereby moving an end of the scrap on at least one side of the first cutting means and the second cutting means to the inside. And a blanking die characterized by comprising a deformation means.

  According to such a structure, the deformation | transformation means plastically deforms a scrap, and the edge part of the scrap of the at least one side of a 1st cutting means and a 2nd cutting means moves inside. Thereby, since the width dimension of the scrap between the 1st cutting means and the 2nd cutting means becomes smaller than the space | interval of a 1st cutting means and a 2nd cutting means, a scrap becomes a 1st cutting means and a 2nd cutting means. It is restrained that it snugly fits between and caught. Therefore, the scrap easily falls between the first cutting means and the second cutting means, and the scrap can be easily discharged.

  Further, the deformation means is configured to sandwich and scrape the scrap between one of the concave portion and the convex portion provided on the lower mold side and the other of the concave portion and the convex portion provided on the upper mold side. Is preferred.

  According to such a configuration, the scrap is curved because the scrap is sandwiched between one of the concave portion and the convex portion provided on the lower mold side and the other of the concave portion and the convex portion provided on the upper mold side. The end of the scrap moves greatly inwardly.

  Further, it is preferable that the deformation means is configured to plastically deform the scrap in conjunction with an operation of dividing the scrap.

  According to such a configuration, since the deformation means plastically deforms the scrap in conjunction with the operation of dividing the scrap, the operation of the scrap cutter dividing the scrap and the operation of the deformation means plastically deforming the scrap are performed. It is executed at almost the same timing. Therefore, it is possible to suppress the catching of scrap without increasing the number of steps.

  Further, the scrap dividing method according to the present invention is a scrap dividing method for dividing scrap remaining between a first cutting means and a second cutting means arranged at positions facing each other with a scrap cutter, the scrap cutter A scrap deforming step of moving the end of the scrap on at least one side of the first cutting means and the second cutting means inwardly by plastically deforming the scrap in conjunction with the operation of dividing the scrap in It is characterized by providing.

  According to this method, the scrap is plastically deformed by the deformation means in conjunction with the operation of dividing the scrap remaining between the first cutting means and the second cutting means by the scrap cutter, so that the end portion of the scrap is brought inward. Since it is moved, scrap does not get caught between the first cutting means and the second cutting means. Therefore, the scrap easily falls between the first cutting means and the second cutting means, and the scrap can be easily discharged.

  According to the present invention, it is possible to provide a blanking mold and a scrap dividing method capable of suppressing scrap from being caught between cutting means.

It is a perspective view of the blanking metal mold | die which concerns on this embodiment. It is a principal part expansion perspective view in the II section of FIG. It is a principal part expansion perspective view which shows the state which looked up at the upper mold | type from the bottom. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 1. It is a VV arrow sectional view of Drawing 4. It is operation | movement explanatory drawing of a blanking metal mold | die, (a) is a top view of a lower mold | type, (b) is sectional drawing of a long side direction, (c) is sectional drawing of a short side direction. It is operation | movement explanatory drawing of a blanking metal mold | die, (a) is a top view of a lower mold | type, (b) is sectional drawing of a long side direction, (c) is sectional drawing of a short side direction. It is operation | movement explanatory drawing of a blanking metal mold | die, (a) is a top view of a lower mold | type, (b) is sectional drawing of a long side direction, (c) is sectional drawing of a short side direction. It is operation | movement explanatory drawing of a blanking metal mold | die, (a) is a top view of a lower mold | type, (b) is sectional drawing of a long side direction, (c) is sectional drawing of a short side direction. It is operation | movement explanatory drawing of a blanking metal mold | die, (a) is a top view of a lower mold | type, (b) is sectional drawing of a long side direction, (c) is sectional drawing of a short side direction.

  An embodiment of the present invention will be described in detail with reference to FIGS. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. In the description, directions will be described based on the front, rear, left, right, top and bottom shown in FIG. The front-rear direction coincides with the long side direction of the rectangular opening 22 described later, and the left-right direction coincides with the short side direction.

FIG. 1 is a perspective view of a blanking mold according to the present embodiment. In FIG. 1, for convenience of explanation, a work W and an upper mold 3 which will be described later are drawn with virtual lines (two-dot chain lines).
As shown in FIG. 1, the blanking mold 1 according to the present embodiment is an apparatus that punches a rectangular frame-shaped product P in plan view from a plate-like workpiece W and divides the scrap S remaining in the center portion. is there. The blanking mold 1 has a lower mold 2 that is a fixed mold and an upper mold 3 that is a movable mold. The shape of the product P is not limited to a square frame shape. For example, when two products are punched by a single blanking process, scrap may remain between the two products. .

  The lower mold 2 includes a placement portion 21 on which the workpiece W is placed, a rectangular opening portion 22 provided in the center of the placement portion 21, and a trimming lower blade 23 formed on the periphery of the opening portion 22. , And two lower mold scrap cutters 24 provided inside the opening 22.

  The placement portion 21 is a top surface of the lower mold 2 and is a planar portion on which the workpiece W is placed. The placement unit 21 holds an area to be the product P of the workpiece W between the pad unit 31 (see FIG. 3) of the upper mold 3 to be described later.

  The opening 22 is a space in which a punch 33 (see FIG. 3) of the upper die 3 described later is inserted. The opening 22 is formed in the same shape as the contour shape of the inner periphery of the product P (in other words, the contour shape of the outer periphery of the scrap S). The opening 22 functions as a discharge path for discharging the scrap S punched out from the workpiece W. As shown in FIG. 2, the inner peripheral surface of the opening 22 is formed as a vertical surface from the upper surface (mounting portion 21) of the lower mold 2 to the upper surface 24 a of the lower mold scrap cutter 24 which will be described later. The side is overhanging so that the scrap S can easily fall. Below the opening 22, a scrap S discharging unit (not shown) is provided.

  The trimming lower blade 23 is a part for cutting the workpiece W by a shearing action with the trimming upper blade 34 provided on the punch 33 of the upper die 3 described later. As shown in FIG. 2, the trimming lower blade 23 is constituted by a ridge line (edge) between the upper surface of the lower mold 2 and the inner peripheral surface of the opening 22. In the present embodiment, the trimming lower blade 23 is formed in a rectangular shape in a plan view, and has a pair of long side portions 23a and a pair of short side portions 23b arranged at positions facing each other.

  As shown in FIG. 1, the two lower mold scrap cutters 24 are provided between the pair of long side portions 23 a in parallel with the short side direction so as to be spaced apart from each other in the long side direction of the opening 22. As shown in FIGS. 2, 4, and 5, the lower die scrap cutter 24 includes an upper surface 24 a that is formed substantially horizontally, and a vertical surface 24 b that is vertically suspended from one end side (front side) of the upper surface 24 a. A scrap cutter lower blade 24d composed of an inclined surface 24c which is inclined so as to be separated from the vertical surface 24b as it goes downward from the other end side of the upper surface 24a, and a scrap cutter lower blade 24d composed of an edge line (edge) between the upper surface 24a and the vertical surface 24b, It has two convex parts 24f provided at both left and right ends (see FIG. 1).

  The scrap cutter lower blade 24d is a portion that cuts (divides) the scrap S by a shearing action with the scrap cutter upper blade 35 provided on the punch 33 of the upper die 3 to be described later. As shown in FIG. 2, the upper surface 24 a of the lower scrap cutter 24 is provided at a position lower than the placement surface 21. That is, the scrap cutter lower blade 24 d is provided at a position lower than the trimming lower blade 23.

  The convex portion 24f is a portion that plastically deforms the scrap S in cooperation with the concave portion 36 provided in the punch 33 of the upper die 3 described later. The convex portion 24f is formed so as to protrude upward from the upper surface 24a, and is formed in a semi-cylindrical shape (kamaboko shape) in which the axial direction is directed in the front-rear direction as a whole. The top of the convex portion 24 f is disposed at a position lower than the placement surface 21. The end of the convex portion 24f on the vertical surface 24b side is formed flush with the vertical surface 24b. The end of the convex portion 24f on the inclined surface 24c side protrudes on the inclined surface 24c.

  As shown in FIG. 1, the upper mold 3 is disposed above the lower mold 2 and is configured to be movable up and down with respect to the lower mold 2. As shown in FIGS. 3 to 5 (mainly FIG. 3), the upper die 3 includes a pad portion 31 that sandwiches the workpiece W between the upper portion 3 and a guide hole 32 provided in the center of the pad portion 31. A punch 33 disposed in the guide hole 32 so as to be movable up and down, a trimming upper blade 34 and a scrap cutter upper blade 35 provided on the lower surface of the punch 33, and a concave portion 36 fitted into the convex portion 24f. ing.

  The pad portion 31 is a bottom surface of the upper mold 3 and is a planar portion formed in substantially the same shape as the placement portion 21.

  The guide hole 32 is a part for guiding the raising and lowering of the punch 33. The inner surface of the guide hole 32 is in sliding contact with the outer surface 33a (see FIG. 4) of the punch 33. Although not shown, a hydraulic cylinder or the like for raising and lowering the punch 33 is disposed above the guide hole 32.

  The punch 33 is a member that punches the scrap S from the workpiece W. The contour shape of the punch 33 is formed in the same shape as the contour shape of the scrap S (the contour shape of the inner periphery of the product P), the inner periphery shape of the guide hole 32, and the inner periphery shape of the opening 22 in plan view. . As shown in FIG. 3, the bottom surface 331 of the punch 33 has a step. Specifically, the bottom surface 331 of the punch 33 has a vertical surface 332 that falls vertically from the bottom surface 331, and an inclined surface 333 that inclines so as to connect the bottom surface 331 and the lower end of the vertical surface 332. The vertical surface 332 is provided at a position corresponding to the vertical surface 24 b in a direction facing the vertical surface 24 b of the lower scrap cutter 24.

  The trimming upper blade 34 is a part that cuts a boundary line between the product P and the scrap S of the workpiece W. The trimming upper blade 34 includes a ridge line 34a between the outer surface 33a (see FIG. 4) and the bottom surface 331 of the punch 33, and a ridge line 34b between the outer surface 33a (see FIG. 4) of the punch 33 and the inclined surface 333. ing. Although illustration is omitted, the trimming upper blade 34 is provided on the entire circumference of the punch 33 so as to face the long side portion 23a and the short side portion 23b of the trimming lower blade 23 of the lower mold 2 in the vertical direction. .

  The pair of long side portions 23a of the trimming lower blade 23 and the portion of the trimming upper blade 34 facing the long side portion 23a of the trimming lower blade 23 are defined as “first cutting means and 2nd cutting means "is comprised.

  The scrap cutter upper blade 35 is a part that cuts (divides) the scrap S by a shearing action with the scrap cutter lower blade 24d of the lower mold 2. The scrap cutter upper blade 35 is constituted by a ridge line between a vertical surface 332 and an inclined surface 333. As shown in FIG. 4, both end portions 35 a of the scrap cutter upper blade 35 are inclined so as to approach the lower mold 2 toward the outside. Thereby, the corner | angular part comprised by the edge line | wire 34b of the trimming upper blade 34 and the edge part 35a of the scrap cutter upper blade 35 among the bottom surfaces 331 of the punch 33 will be in the state protruded to the lowest side (refer FIG. 3). ).

  The concave portion 36 is a portion that plastically deforms the scrap S in cooperation with the convex portion 24 f provided in the lower mold scrap cutter 24. The recessed portion 36 is recessed at a position on the bottom surface 331 of the punch 33 that faces the protruding portion 24 f in the vertical direction. The recess 36 is formed in a semicircular shape in a cross-sectional view, and the end of the recess 36 on the vertical surface 332 side is provided so as to be in contact with the vertical surface 332.

The scrap cutter lower blade 24d of the lower mold scrap cutter 24 and the scrap cutter upper blade 35 provided on the bottom surface 331 of the punch 33 constitute a "scrap cutter" in the claims.
Further, the convex portion 24f of the lower scrap cutter 24 and the concave portion 36 provided on the bottom surface 331 of the punch 33 constitute "deforming means" in the claims.

  The blanking mold 1 according to the present embodiment is basically configured as described above. Next, a scrap dividing method using the blanking mold 1 will be described with reference to FIGS. 1 to 10 (mainly FIG. 6). Details will be described with reference to FIG. In the following description, in the plan view of the lower mold 2 shown in FIG. 6A to FIG. 10A, the cut portion of the workpiece W is indicated by a thick line (reference numerals Y1 to Y4).

  First, as shown in FIGS. 4 and 5, the workpiece W is disposed between the lower mold 2 and the upper mold 3, the upper mold 3 is lowered, and the product P of the workpiece W is placed on the placement portion 21 and the pad portion 31. Hold the part. At this time, the punch 33 is at a position spaced upward from the workpiece W.

  Next, as shown in FIGS. 6A, 6 </ b> B, and 6 </ b> C, when the punch 33 is lowered toward the lower mold 2, the ridge line 34 b of the trimming upper blade 34 and the scrap cutter in the bottom surface 331 of the punch 33. A corner portion constituted by the end portion 35a of the upper blade 35 enters the workpiece W. Thereby, the product P and the scrap S begin to be cut by the trimming lower blade 23 and the trimming upper blade 34 (more specifically, the long side portion 23a and the ridge line 34b), and the scrap S starts to be divided by the scrap cutter upper blade 35. . As a result, a substantially L-shaped cut is formed as indicated by reference numeral Y1 in FIG.

  Next, as shown in FIG. 7A, when the punch 33 is further lowered, the product P and the scrap S are formed by the ridge line 34 b of the trimming upper blade 34 provided at the end of the inclined portion 333 and the trimming lower blade 23. Is cut (see symbol Y2). At this time, since the ridge line 34a of the trimming upper blade 34 has not yet reached the workpiece W, the portion corresponding to the ridge line 34a in the boundary between the product P and the scrap S is not cut. Further, as shown in FIG. 7B, the scrap S is pushed by the scrap cutter upper blade 35 and is bent downward. At this time, as shown in FIG. 7C, only a slight range on the placement portion 21 side of the scrap S is cut by the end portion 35 a of the scrap cutter upper blade 35.

  Next, as shown in FIGS. 8A and 8C, when the punch 33 is further lowered, the ridge line 34 a constituting the trimming upper blade 34 enters the workpiece W. As a result, the product P and the scrap S are completely cut by the trimming lower blade 23 and the trimming upper blade 34 (more specifically, the long side portion 23a and the ridge line 34a) (see symbol Y3 in FIG. 8A). At this time, in this embodiment, as shown in FIGS. 8B and 8C, the scrap S pushed down by the scrap cutter upper blade 35 is sandwiched between the scrap cutter lower blade 24d and the scrap cutter upper blade 35. It becomes a state, and it is in the state immediately before cutting. Further, a portion of the scrap S that has already been cut by the scrap cutter upper blade 35 is elastically deformed and rides on the convex portion 24f.

  Next, as shown in FIGS. 9A, 9B, and 9C, when the punch 33 is further lowered, the scrap S is moved in the long side direction by the shearing action of the scrap cutter upper blade 35 and the scrap cutter lower blade 24d. Divided into three (see symbol Y4 in FIG. 9A). Simultaneously with the division of the scrap S, the vicinity of both ends of the scrap S on the side of the long side 23 a is recessed in the protruding portion 24 f formed on the upper surface 24 a of the lower scrap cutter 24 and the bottom surface 331 of the punch 33. And the recessed portion 36. As a result, the scrap S is plastically deformed along the shapes of the convex portion 24f and the concave portion 36, and the end S1 (see FIG. 9C) of the scrap S on the long side portion 23a side is inside the scrap S (more details). If it says, it will move to the direction away from the internal peripheral surface of the opening part 22).

  Finally, as shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, when the punch 33 is raised, the edge of the scrap S sandwiched between the upper surface 24 a of the lower die scrap cutter 24 and the bottom surface 331 of the punch 33. Is released, and the divided scrap S falls below the lower mold 2 through the opening 22. At this time, since the end S1 of the scrap S on the long side 23a side is separated from the inner peripheral surface of the opening 22 due to plastic deformation of the scrap S, the scrap S is long side 23a of the trimming lower blade 23. It does not get caught between them. Further, since the product P remains between the placement portion 21 and the pad portion 31, the product P can be obtained by raising the pad portion 31 and opening the mold.

  According to the blanking mold 1 according to the present embodiment, the scrap S is plastically deformed by the convex portions 24f and the concave portions 36 constituting the deformation means, so that the end S1 on the long side portion 23a side of the scrap S is The trimming lower blade 23 constituting part of the first cutting means and the second cutting means can be separated from the long side portion 23a. Thereby, since the width dimension of the scrap S between the long side parts 23a becomes smaller than the space | interval of the long side parts 23a, it is suppressed that the scrap S fits between the long side parts 23a closely, and is caught. Is done. Therefore, the scrap S easily falls into the opening 22, and the scrap S can be easily discharged.

  Further, the convex portion 24f and the concave portion 36 constituting the deformation means sandwich the end portion of the scrap S and perform plastic deformation in conjunction with the operation of lowering the punch 33 and cutting the scrap S, thereby increasing the number of processes. Without being caught in the scrap S.

  As mentioned above, although embodiment of this invention was described in detail with reference to drawings, this invention is not limited to this, In the range which does not deviate from the main point of invention, it can change suitably.

  For example, in this embodiment, two sets of convex portions 24f and concave portions 36 are provided at both ends of the scrap cutter, but the present invention is not limited to this, and one set of convex portions 24f on one side of the scrap cutter. A recess 36 may be provided.

  In the present embodiment, the convex portion 24f is formed integrally with the lower die scrap cutter 24. However, the present invention is not limited to this, and the convex portion 24f is formed separately from the lower die scrap cutter 24. May be. The recess 36 may also be provided separately from the punch 33 as long as it moves up and down in synchronization with the punch 33.

DESCRIPTION OF SYMBOLS 1 Blanking metal mold | die 2 Lower mold | type 21 Mounting part 22 Opening part 23 Trimming lower blade (1st cutting means and 2nd cutting means)
24 Lower Scrap Cutter 24d Scrap Cutter Lower Blade (Scrap Cutter)
24f Convex part (deformation means)
3 Upper die 31 Pad part 32 Guide hole 33 Punch 34 Trimming upper blade (first cutting means and second cutting means)
35 Scrap cutter upper blade (scrap cutter)
36 Concavity (deformation means)

Claims (4)

A first cutting means and a second cutting means arranged at positions facing each other;
A scrap cutter that is disposed in a direction intersecting with the first cutting means and the second cutting means, and divides the scrap remaining between the first cutting means and the second cutting means;
Deformation means for moving the scrap on the inner side at least one of the first cutting means and the second cutting means by plastically deforming the scrap;
A blanking mold characterized by comprising:   The deformation means is characterized in that the scrap is sandwiched and plastically deformed by one of the concave portion and the convex portion provided on the lower mold side and the other of the concave portion and the convex portion provided on the upper mold side. The blanking die according to claim 1.   The blanking die according to claim 1 or 2, wherein the deformation means plastically deforms the scrap in conjunction with an operation of dividing the scrap. A scrap dividing method for dividing a scrap remaining between a first cutting means and a second cutting means arranged at positions facing each other with a scrap cutter,
Scrap that moves the end of the scrap on at least one side of the first cutting means and the second cutting means inwardly by plastically deforming the scrap in conjunction with the operation of dividing the scrap with the scrap cutter A scrap dividing method comprising a deformation step.

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