JP2008307593A - Trimming press die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die structure by which the generation of strain and deformation in a portion equivalent to a notched part can be prevented when the notched parts are not simultaneously worked although it is presupposed that whether the notched part is simultaneously worked or not is selectively changeable when trimming. <P>SOLUTION: When the notched part Q is not worked simultaneously with trimming of a scrap region S from a product part region P, the descent of an upper die 2 is stopped after upper and lower cutting blades 6, 7 are engaged with each other and before an auxiliary trimming die 4 is brought into contact with a workpiece W. Then, when working the notched part Q simultaneously with the trimming, the descent of the upper die 2 is continued until the upper and lower cutting blades 6, 7 for trimming are engaged with each other and upper and lower cutting blades 8, 9 for notched parts are engaged with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention crosses a part of the trim line when a trimming press die, in particular, a scrap area attached to the outer periphery of a product area in a panel-shaped work is cut and removed by a trim line to perform so-called trimming. The present invention relates to a trimming press die capable of selectively switching whether or not to simultaneously process a notch part in a part of a product part region with a notch cut line.

  As this type of trimming press mold, for example, the one described in Patent Document 1 is known.

  In the one described in Patent Document 1, an upper die blade and a lower die blade for cutting the product region from the trim line, and an upper auxiliary blade and a lower auxiliary member for machining the notch portion with a notch cut line as necessary. As a trimming press mold with a blade, the upper auxiliary blade is arranged in parallel with the upper mold blade so as to move up and down together with the upper mold blade, the lower auxiliary blade is provided integrally with the lower mold blade, and the lower mold The blade is provided with a step which can lower the upper auxiliary blade to an appropriate position lower than the lower auxiliary blade.

Thereby, one press die can be used properly depending on whether the notch is simultaneously processed simultaneously with trimming or not.
Japanese Patent Laid-Open No. 4-190932

  In the technique described in Patent Document 1, a step is positively provided in the lower die blade so that the upper auxiliary blade can be lowered to a position lower than the lower auxiliary blade. As is clear from the figure, even when the notch portion is not processed, the portion corresponding to the notch portion is at least restrained by the upper die blade and pushed into the cavity side where the lower auxiliary blade is formed on the opening edge. Therefore, distortion, deformation, breakage, or the like occurs in a portion corresponding to the notch, which is not preferable.

  The present invention has been made paying attention to such a problem, and in particular, it is presumed that it is possible to selectively switch whether or not the notches are simultaneously processed at the time of trimming, as in the prior art. The present invention provides a trimming press type structure that can prevent the occurrence of distortion, deformation, breakage or the like in a portion corresponding to the notch when the two are not simultaneously processed.

  The present invention provides a product part having a cut-out cut line that intersects with a part of the trim line when trimming by cutting / removing the scrap area attached to the outer periphery of the product part area of the panel-like workpiece with a trim line. It is premised on a trimming press die that can selectively switch whether or not a notch portion is simultaneously processed in a part of the region.

  In addition, the upper die corresponds to a trimming die having an upper trimming cutting edge corresponding to the trim line, and a notch cutting line that is positioned above the trimming cutting edge and should be the contour of the notch. An auxiliary trimming die having an upper notch cutting edge, and the lower die has a lower trimming blade corresponding to the trim line, and the lower trimming cutting edge has no step in the vertical direction. And a lower notch cutting blade corresponding to a notch cut line that should be the contour of the notch continuously.

  Then, in a portion corresponding to the intersection of the trim line and the notch cut line, a minute relief portion is set between the upper trimming cutting blade and the upper notch cutting blade in a plan view, and both are discontinuous. It is characterized by being.

  Therefore, in the present invention, when the notch portion is not simultaneously processed at the same time as the trimming, the upper and lower trimming cutting blades are connected to each other before the upper notch cutting blade meshes with the lower notch cutting blade. Trimming is performed by a shearing action based on the meshing. On the other hand, in the case of simultaneously processing the notch at the same time as the trimming, the upper and lower notch cutting blades are trimmed by the shearing action based on the engagement between the upper and lower trimming cutting edges. The notch is processed by a shearing action based on the meshing between them.

  In this case, on the lower mold, there is a step in the vertical direction between the lower trimming cutting edge corresponding to the trim line and the lower cutting edge corresponding to the notch cutting line that should be the contour of the notch. Since they are located on the same plane without being cut, if the cutout portions are not simultaneously processed during trimming as in the prior art, the portions corresponding to the cutout portions are not distorted, deformed or broken.

  According to the present invention, when the notch portions are not simultaneously processed at the time of trimming, the portion corresponding to the notch portion is not distorted, deformed, or broken, so that the quality of the product area is improved.

  FIG. 1 and the following drawings show a more specific embodiment of the present invention. In particular, FIG. 1 shows an example of a panel-shaped workpiece to be processed, and FIG. 2 and subsequent drawings show the panel-shaped workpiece as a processing target. The respective trimming press mold structures are shown.

  A panel-like work (hereinafter simply referred to as “work”) W shown in FIG. 1 is a part such as a wheel house outer that becomes a part of a car body of an automobile, for example, and is a product part in a trimming process following drawing or stretch forming. The scrap area (non-product area) S attached around the area P is cut and removed from the trim line TL so-called trimming. When the trimming is performed, a part of the product part region P is processed at the same time as when the notch part Q is simultaneously processed with a notch cut line CL intersecting with a part of the trim line TL according to, for example, a difference in vehicle type or specification. In the trimming press die according to the present embodiment, the trimming of the workpiece W having the cutout portion Q and the trimming of the workpiece W having no cutout portion Q can be used in common. ing.

  Note that switching between machining of the workpiece W with the notch Q and machining of the workpiece W without the notch Q is performed by switching the height of the lower limit position of the upper die 2 with respect to the lower die (punch) 1 as described later. In addition, a region (a hatched portion) that becomes a scrap when the notch portion Q is formed with the notch cut line CL is indicated by a symbol M in FIG.

  2A shows a state where the upper die 2 is in the ascending limit position when the notch Q is not processed by the trimming press die, and FIG. 2B shows a state where the upper die 2 is in the descending limit position. Show. 2A and 2B are cross-sectional views taken along line aa in FIG.

  In these drawings, the trimming press die is composed of a punch 1 as a fixed lower fixed type die and an upper die 2 that moves up and down with respect to the punch 1, and the upper die 2 includes a trimming die 3 arranged adjacent to each other. It consists of an auxiliary trimming die 4. As shown in FIG. 3, the punch 1 is formed with a substantially rectangular punch hole 5 that receives the auxiliary trimming die 4 when the upper die 2 is lowered. Here, the punch 1 is attached to a lower holder not shown, and the trimming die 3 and the auxiliary trimming die 4 are attached to a common upper holder not shown.

  The trimming die 3 has an upper trimming cutting edge 6 corresponding to the trim line TL at the lower end thereof, while the punch 1 has a lower trimming cutting edge 7 corresponding to the trim line TL. Therefore, as shown in FIG. 4 in addition to FIG. 2B, when the upper die 2 is lowered with respect to the punch 1 on which the workpiece W is placed, the upper and lower trimming cutting blades 6 and 7 mesh with each other, and the meshing occurs. The scrap region S is cut and removed from the product portion region P of FIG. 1 with a shearing action based on the above, and so-called trimming is performed.

  The auxiliary trimming die 4 that forms the upper die 2 together with the trimming die 3 is formed with a substantially U-shaped upper notch cutting edge 8 corresponding to the notch cut line CL of FIG. The punch 1 as a mold is formed with a lower notch cutting edge 9 in a substantially U-shape corresponding to the notch cut line CL at the upper opening edge of the punch hole 5. The upper notch cutting edge 8 is set at a position higher by a predetermined amount than the upper trimming cutting edge 6 on the trimming die 3 side adjacent thereto. In other words, the lower end portions of the trimming die 3 and the auxiliary trimming die 4 have a predetermined step b, and the size of the step b does not change at all depending on whether or not the notch Q is processed.

  Therefore, unlike FIG. 2B and FIG. 4, as shown in FIG. 6 in addition to FIG. 5B, trimming based on the engagement of the upper trimming cutting edge 6 and the lower trimming cutting edge 7 is performed. At this time, if the auxiliary trimming die 4 is lowered until the upper notch cutting edge 8 and the lower notch cutting edge 9 are engaged with each other, the notch cutting is performed following trimming of the scrap region S from the trim line TL. The scrap area M is cut and removed along the line CL, and the notch Q is processed. 5A and 5B are cross-sectional views along the line aa in FIG. 3 as in FIG.

  Here, as shown in FIG. 6 in addition to FIG. 3, the portion close to the lower trimming cutting edge 7 in the upper surface opening edge of the punch hole 5 is flush with the lower cutting edge 9. The flat part 10 of minute width dimension e (e is about 2 mm, for example) located in is formed. The flat portion 10 is continuous with the inner surface of the punch hole 5 with an inclined surface 10a having an inclination angle θ. Further, in order to avoid interference between the flat portion 10 and the auxiliary trimming die 4, an escape portion 11 of E (E is about 3 to 4 mm, for example) is formed between the trimming die 3 and the auxiliary trimming die 4. Yes. Thus, even if the lower notch cutting edge 9 is located on the same plane without generating a step in the vertical direction between the lower trimming cutting edge 7 and the lower trimming cutting edge 7, Since the flat portion 10 is close to the lower portion 7, the lower notch cutting edge 9 is discontinuous with respect to the lower trimming cutting edge 7, and the lower trimming cutting edge 7 is The ridge line portion formed by the flat portion 10 of the punch 1 and the blade side surface 1a is formed.

  Here, the lower limit position of the upper mold 2 is switched each time using, for example, the function of a stroke adjusting mechanism or a slide adjusting mechanism attached to the press machine.

  Therefore, according to the trimming press die of the present embodiment configured as described above, when processing the workpiece W not having the notch portion Q, when the upper die 2 is lowered as shown in FIG. Although the lower trimming cutting edge 7 and the upper trimming cutting edge 6 are engaged with each other by a predetermined amount to cause a shearing action, the auxiliary trimming die 4, that is, the upper notch cutting edge 8 does not contact the workpiece W. The lower limit position of the upper mold 2 is set in advance. For this reason, even if the upper mold 2 is lowered, the product part region P is cut and separated from the scrap S by the trim line TL shown in FIG. The cutout Q is not processed because it does not contact W.

  In this case, since the flat portion 10 and the lower notch cutting edge 9 are on the same plane, an unreasonable force is not applied to the region to be the notch Q in the product portion region P, and the notch Unnecessary distortion, deformation or breakage of a part of the product part region P corresponding to Q does not occur.

  On the other hand, when processing the workpiece W having the notch Q, when the upper die 2 is lowered as shown in FIG. 6, the lower trimming cutting edge 7 and the upper trimming cutting edge 6 are only a predetermined amount. The upper and lower cutting edges 8 and 8 of the auxiliary trimming die 4 and the lower cutting edge 9 of the auxiliary trimming die 4 are engaged with each other so that the shearing action is achieved. The lower limit position of the upper mold 2 is set in advance. Therefore, when the upper die 2 is lowered, the product area P is cut and separated from the scrap S by the trim line TL shown in FIG. The notch cutting edge 9 and the upper notch cutting edge 8 are engaged with each other, and the scrap region M is cut and separated by the notch cut line CL by the shearing action based on the engagement, so that the notch Q is formed. .

  In this case, since there is a flat portion 10 on the upper surface of the punch 1, the meshing portions of the lower and upper notch cutting blades 9, 8 corresponding to the notch cut line CL are lower and upper corresponding to the trim line TL. The trimming cutting blades 7 and 6 are discontinuous with respect to the meshing portion, and uncut portions are generated in the portion corresponding to the flat portion 10.

  However, as shown in FIG. 6, when the upper die 2 is lowered to near the lower limit position, the auxiliary trimming die 4 pushes the scrap area M to be the notch portion Q into the punch hole 5 side. Of these, a predetermined tension acts on the portion corresponding to the flat portion 10, and in this portion, the cut-out cut line CL is extended from the cut-out cut line CL side toward the trim line TL side. The “breaking break” occurs, and the notch portion Q is finally formed with the notch cut line CL that intersects the trim line TL.

  Note that the fracture surface due to the above-mentioned “tearing fracture” is not necessarily finished finely, but since this part is post-processed, there is no practical problem.

  As described above, according to the present embodiment, when at least the notch Q is not simultaneously processed at the time of trimming, the product part region P corresponding to the notch Q is not distorted, deformed or broken. Therefore, it can contribute to the quality improvement of the product part area P.

The schematic explanatory drawing which shows an example of the panel-shaped workpiece | work used as the process target with the trimming press type | mold which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of the trimming press type | mold which concerns on this invention, (A) is explanatory drawing at the time of the upper die raise | lifting when notching a notch part, FIG. Explanatory drawing at the time of mold lowering. The principal part expansion perspective view of the punch shown in FIG. The c section enlarged view of (B) of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of the trimming press type | mold which concerns on this invention, (A) is explanatory drawing at the time of the upper die raise | lifting when processing a notch part, (B) is the top when processing a notch part similarly. Explanatory drawing at the time of mold lowering. FIG. 6B is an enlarged view of a portion d in FIG.

Explanation of symbols

1 ... Punch (lower mold)
DESCRIPTION OF SYMBOLS 1a ... Blade side surface 2 ... Upper die 3 ... Trimming die 4 ... Auxiliary trimming die 5 ... Punch hole 6 ... Upper trimming cutting blade 7 ... Lower trimming cutting blade 8 ... Upper notch cutting blade 9 ... Lower Cutting blade for notch 10 ... Flat part M ... Scrap area P ... Product part area Q ... Notch part S ... Scrap area W ... Panel work

Claims (4)

When trimming by trimming the scrap area attached to the outer periphery of the product area of the panel-shaped workpiece with a trim line, a part of the product area with a cut line that intersects with the trim line. It is a trimming press die that can selectively switch whether or not to simultaneously process the notches,
The upper die includes a trimming die having an upper trimming cutting edge corresponding to the trim line, and an upper notch portion located above the trimming cutting blade and corresponding to a notch cutting line to be the contour of the notch portion. An auxiliary trimming die having a cutting edge for use,
The lower die has a lower trimming cutting edge corresponding to the trim line, and a lower notch corresponding to the lower trimming cutting edge and the notch cutting line that should be continuous with the lower trimming cutting edge in the vertical direction without any step. A cutting blade for the part,
Furthermore, in a portion corresponding to the intersection of the trim line and the notch cut line, a minute relief portion is set between the upper trimming cutting blade and the upper notch cutting blade in a plan view, and the two are discontinuous. Trimming press mold characterized by being as follows. In the portion corresponding to the notch portion of the lower mold, a flat portion having a minute width located on the same plane as the lower notch cutting blade is formed along the trim line,
2. The trimming press die according to claim 1, wherein a lower trimming cutting blade is formed at a ridge line portion formed by the flat portion and the side surface of the blade. If the above-mentioned notch is not processed simultaneously with trimming, the shear action based on the meshing of the upper and lower trimming cutting edges before the upper notching blade engages with the lower notching blade. While trimming is done by
When simultaneously processing the above-mentioned notch part at the same time as trimming, the upper and lower notch cutting edges are cut after the trimming is performed by the shearing action based on the meshing between the upper and lower trimming cutting edges. The trimming press die according to claim 1 or 2, wherein the notch portion is processed by a shearing action based on the meshing of the two. Switching whether or not to process the notch at the same time is done by switching the lower limit position of the upper mold,
In the case of simultaneously processing the notches, the amount of meshing between the upper and lower trimming cutting blades is set to be larger than that in the case where the notches are not simultaneously processed. Trimming press mold as described.

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