JP2011251361A - Punching device of sheet member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To punch a sheet member by a punching blade without using a butting plate and a carrier sheet.SOLUTION: This punching device is constituted of an upper die 2 and a lower die 3, and the upper die includes a punch plate 23 composed of an iron and steel material arranged toward the lower die by integrating a punching blade 23a formed in a shape of punching a contour line of a product in the sheet member, and the lower die includes a die plate 31 oppositely arranged to the punch plate and composed of an iron and steel material of forming a punching blade groove 31a along the contour formed of a shape of punching the contour line of the product in the sheet member of the punching blade. The punching blade groove is formed with a groove width of not causing a punching failure when the sheet member deflects by a pressing force of the punching blade when punching the sheet member by fitting the punching blade inside in press-working by the upper die and the lower die.

Description

  The present invention relates to a sheet member punching device used to punch a sheet member such as thin paper or plastic sheet along a predetermined contour line of a product.

  2. Description of the Related Art Conventionally, a sheet member punching device used to punch a sheet member such as a thin paper or a plastic sheet along a predetermined contour line is known (for example, see Patent Document 1). In order to prevent the cutting edge of the punching blade from being worn or damaged when the sheet member is punched by a press machine, this punching device is used after the punching blade punches the sheet member, It is comprised so that the contact plate which consists of a synthetic resin which can protect can be contacted. That is, a sheet plate is punched with a punching blade by placing a backing plate on a plate disposed opposite to a plate provided with a punching blade and pressing the two plates.

  In such a sheet member punching device, when the punching blade punches the sheet member at the time of pressing, the punching blade can be bitten into a backing plate made of a synthetic resin.

Japanese Patent Laid-Open No. 2002-233959

  However, in the sheet member punching apparatus described in the background art, each time the sheet member is punched with the punching blade, the cutting edge of the punching blade is gradually worn out because it bites into the backing plate made of synthetic resin. Since the sharpness deteriorated, the cauldron had to be replaced after some use.

  Further, when such a backing plate is provided in the lower die of an upper die and a lower die, a punch for punching holes in the sheet member and a cutting blade for half cut for half-cutting the sheet member may be incorporated. was difficult. This is because the base plate is a synthetic resin, so in the case of a punch, the sharpness of the punch hole provided in the base plate will be reduced. In the case of a cutting blade for half cut, the thickness of the base plate changes depending on the temperature and humidity. This is because the depth of the half cut will change. When the depth of the half cut changes, in the case of a multi-sheet member in which the product film material is laminated and bonded onto the base film material coated with the release agent via the adhesive material, only the product film material is accurately cut out I can't do that.

  Although a carrier sheet may be used instead of the backing plate, in the case of a carrier sheet, one carrier sheet is attached to one sheet member and the sheet member is punched with a punching blade. In addition to the time and effort, the material costs increased.

  The present invention has been made to solve such a conventional problem, and provides a sheet member punching device that can punch a sheet member with a punching blade without using a backing plate or a carrier sheet. For the purpose.

  Moreover, even if a punch and a cutting blade for half-cutting are incorporated in the present invention, punching of a sheet member that can prevent the punch hole from being deteriorated and can accurately half-cut the sheet member with the cutting blade for half-cutting. An object is to provide an apparatus.

  The sheet member punching apparatus according to the first aspect of the present invention that achieves the above-described object includes an upper mold that is detachably fixed to a slide of a press machine, and a lower mold that is detachably fixed to a bolster of the press machine. This is a sheet member punching device in which an upper die is moved up and down by a slide in order to perform press punching with a punching blade formed in a shape for punching a contour line of a product on a sheet member. It has a punch plate made of a steel material with a blade integrated toward the lower die, and the lower die is arranged to face the punch plate and has a shape for punching the outline of the product on the sheet member of the punching blade It is equipped with a die plate made of a steel material in which a cutting blade groove along the contour is formed, and the cutting blade groove fits into the cutting blade when pressing with the upper die and the lower die. Nde when punching the sheet member, the sheet member is being formed by the groove width such as not to punching failure deflected by the pressing force of the punching blade.

  According to the punching device for a sheet member according to the first aspect as described above, a punching blade formed in a shape for punching a contour line of a product on a sheet member is integrally formed on a punch plate made of a steel material, A die blade made of a steel material is formed with a punching blade groove along the contour of the shape of punching blade product, and the punching blade groove is punched at the time of pressing with the upper die and the lower die. When punching out the sheet member with the blade fitted, the sheet member is formed with a groove width so that it does not become defective due to bending by the pressing force of the punching blade, so even without using a backing plate or carrier sheet, The sheet member can be reliably punched with a punching blade. Therefore, it is possible to prevent the man-hours of the worker from increasing and the material cost to increase, and when a punch or a half-cut cutting blade is provided, the punch hole sharpness is reduced or the half-cut It is possible to prevent the depth from changing.

  In a sheet member punching device according to a second aspect of the present invention, the lower die includes a plurality of elastic bodies that impart elastic force to the upper punch plate, and the plurality of elasticity The body is arranged so as to support the punch plate in a well-balanced manner and to maintain parallelism between the punch plate and the die plate when contacting the die-matching surface of the punch plate.

  According to the sheet member punching apparatus according to the second aspect as described above, the punch plate is supported by a plurality of elastic bodies in a balanced manner from the lower mold side so as to maintain the parallelism between the punch plate and the die plate. Therefore, when punching a sheet member by fitting a punching blade during press processing with an upper die and a lower die, the sheet member is formed with a groove width that does not bend due to the pressing force of the punching blade and cause defective punching. The punching blade can be accurately guided into the groove for the punching blade.

  According to a third aspect of the present invention, in the sheet member punching device according to the first aspect or the second aspect, a pressing member for pressing the sheet member during pressing is fixed to the punch plate. .

  According to the sheet member punching device as the third aspect, it is possible to prevent the sheet member from being displaced during press working.

  According to a fourth aspect of the present invention, in the sheet member punching device according to any one of the first to third aspects, the elastic body is a compression coil spring. According to the punching device for a sheet member according to the fourth aspect as described above, it is easy to apply a resilient force so as to support the punch plate in a well-balanced manner and maintain the parallelism between the punch plate and the die plate. Become.

  According to the sheet member punching apparatus of the present invention, the sheet member can be punched with a punching blade without using a backing plate or a carrier sheet.

  In addition, according to the sheet member punching device of the present invention, it is possible to prevent the sharpness of the punch hole from being lowered, and the sheet member can be accurately half-cut with the cutting blade for half-cutting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall cross-sectional view showing a preferred embodiment of a sheet member punching apparatus according to the present invention, where (A) is a view in which an upper mold and a lower mold are opened, and (B) is a view in a state where the upper mold is moving. (C) is a figure of the state where the upper mold reached the bottom dead center. (A) is a top view of the upper mold | type in the punching apparatus of FIG. 1, (B) is a top view of the lower mold | type in the punching apparatus of FIG. 1A is an enlarged view of a portion surrounded by a one-dot chain line circle in FIG. 1B, and FIG. 1B is an enlarged view of a portion surrounded by a one-dot chain line circle in FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for carrying out a sheet member punching apparatus according to the present invention will be described below with reference to the drawings. The sheet member punching apparatus of the present invention is, for example, mounted on a press machine and presses the sheet member. FIGS. 1 (A), (B), (C), FIGS. 2 (A), (B) As shown, a press mold 1 is composed of an upper mold 2 attached to a slide of a press machine and a lower mold 3 attached to a bolster of the press machine. The pressing mold 1 is for punching a product outline and a punch hole of a predetermined shape in a multiple sheet member and half-cutting a product film material of the multiple sheet member.

  The upper die 2 is a punch holder 21 that is detachably fixed to a slide of a press machine, and is punched in a shape that is fixed to the punch holder 21 via a spacer 22 and punches a contour line of a product on a multiple sheet member. A blade 23a is integrated with a punch plate 23 provided toward the lower mold. The spacer 22 is fixed to the punch holder 21 in a stacked state with respect to the punch holder 21 by a screw fixing member 24 such as a hexagon socket head bolt, and the punch plate 23 is fixed to the spacer 22 by a screw fixing member 25 such as a hexagon socket head bolt. Are fixed to the punch holder 21 in a stacked state. In FIG. 2A, four screwing members 24 and eight screwing members 25 are used to fix the spacer 22 and the punch plate 23 to the punch holder 21, but the number can be changed as appropriate. It is.

  The punch holder 21 is formed with a through hole 21a through which the guide pin 26 is inserted. The guide pin 26 is press-fitted into the through hole 21a of the punch holder 21 so as not to drop off.

  The planar shape of the punching blade 23a provided on the punch plate 23 is, for example, a quadrangular shape with four corners having an R shape. Further, for example, four circular first punches 23b and a second punch 23c having a shape in which a part of one square is cut out are provided inside the punching blade 23a of the punch plate 23. ing. Since the first punch 23b has a hook, as shown in FIGS. 3A and 3B, the punch plate 23 has a hook fitting hole 23d into which the hook 23b ′ is fitted, and the through hole 23e and the shaft center. Are concentrically cut away on the spacer 22 side. Further, the punch plate 23 is provided with a half-cutting blade 23f for half-cutting the multiple sheet member before the punching blade 23a punches the multiple sheet member toward the lower die 3. As shown in FIG. 2A, the half-cutting blade 23f has, for example, a quadrangular shape with four corners formed in an R shape, and includes a punching blade 23a, a first punch 23b, and a second punch 23c. It is arranged between.

  As shown in FIGS. 1 (A), (B), (C), and FIG. 2 (B), the lower die 3 is disposed opposite to the punch plate 23 and punches the contour line of the product on the multiple sheet member of the punching blade 23a. There are provided a die plate 31 in which a punching blade groove 31a is formed along a contour having a shape, and a die holder 32 fixed to the die plate 31 and detachably fixed to a bolster of a press machine. The die plate 31 is fixed to the die holder 32 in a stacked state with respect to the die holder 32 by a screwing member 33 such as a hexagon socket head bolt. In FIG. 2B, four screwing members 33 are used and the die plate 31 is fixed to the die holder 32, but the number can be changed as appropriate.

  The punching blade groove 31a provided in the die plate 31 is a pressing force of the punching blade 23a when the punching blade 23a is fitted into the punching blade 23a when the upper die 2 and the lower die 3 are pressed. Therefore, it is formed with a groove width that does not bend and cause defective punching. The groove width varies depending on the material and thickness of the sheet member and the cutting edge angle of the punching blade.

  In addition, the lower die 3 includes a plurality of elastic bodies 34 that impart elastic force to the punch plate 23 of the upper die 2, and the plurality of elastic bodies 34 are in contact with the die-matching surface of the punch plate 23. The punch plate 23 is supported in a well-balanced manner so that the parallelism between the punch plate 23 and the die plate 31 is maintained. As shown in FIGS. 2 (A) and 2 (B), four elastic bodies 34 are arranged to support the punch plate 23 in a balanced manner. However, the present invention is not limited to this, and the punch plate 23 is supported in a balanced manner. Any number can be used.

  The die plate 31 includes a through hole 31e for fitting and fixing a sliding bearing bush 35 for slidably guiding the guide pin 26 of the upper mold 2 and a first punch hole into which the first punch 23b is inserted. 31b, a second punch hole 31c into which the second punch 23c is inserted, and a through hole 31d (see FIGS. 3A and 3B) for accommodating the elastic body 34 are formed.

  The die holder 32 includes a through hole 32a for gently inserting the guide pin 26, a through hole 32b for dropping a punch when the multiple sheet member is punched with the first punch 23b, and a multiple sheet member. A through hole 32c for dropping a punch when punching with the second punch 23c and a counterbore 32d (see FIGS. 3A and 3B) for accommodating the elastic body 34 are formed. Has been. Note that the punch that has dropped into the through hole 32b and the through hole 32c of the die holder 32 can be removed by various removing means such as suction.

  The elastic body 34 is preferably a compression coil spring that can be easily incorporated into the through hole 31d of the die plate 31 and the counterbore 32d of the die holder 32. In this case, the elastic body 34 is inserted into the through hole 31d of the die plate 31 and the counterbore hole 32d of the die holder 32. The accommodated compression coil spring 34 is incorporated in the lower mold 3 by stripper bolts 36a and washers 36b. Specifically, as shown in FIGS. 3A and 3B, the shaft portion of the stripper bolt 36a is inserted into a bolt insertion hole 32e provided in the die holder 32 from below in the figure, and the head of the stripper bolt 36a is inserted. The portion is locked to the step portion of the bolt insertion hole 32e. A compression coil spring 34 is fitted into the shaft portion of the stripper bolt 36a protruding from the bolt insertion hole 32e of the die holder 32, and the female screw portion of the washer 36b is screwed into the male screw portion at the end of the shaft portion. The coil spring 34 is mounted between the die holder 32 and the washer 36b.

  In this way, the four compression coil springs 34 provided in the lower die 3 are arranged so that when the upper die 2 descends from the top dead center at the time of press working by sliding and comes into contact with the die mating surface of the punch plate 23, The stripper bolt 36a is provided with a step difference in the bolt insertion hole 32e of the die holder 32 so that the plate 23 can be supported in a balanced manner and an elastic force can be applied so as to maintain the parallelism between the punch plate 23 and the die plate 31. Movement is restricted by the department.

  Further, such four compression coil springs 34 are arranged such that when the upper die 2 is lowered from the top dead center at the time of press working by sliding, the first punch 23b is inserted into the first punch hole 31b and the second punch 23c. Before entering the second punch hole 31c, the first punch 23b and the second punch 23c of the punch plate 23 are brought into contact with the punch plate 23 via the washer 36b. And a resilient force can be applied so as not to cause a displacement in the insertion direction between the second punch hole 31c and the second punch hole 31c.

  As described above, the four elastic bodies 34 are arranged so as to support the punch plate 23 in a well-balanced manner from the lower mold side so as to keep the parallelism between the punch plate 23 and the die plate 31. A punching blade groove formed with a groove width that does not cause a punching defect when the punching blade 23a is fitted and punched by the lower die 3 to punch the sheet member by the pressing force of the punching blade 23a. The punching blade 23a can be accurately guided into 31a. Therefore, the punching blade 23a can be prevented from hitting the wall surface of the punching blade groove 31a and damaging the cutting edge, and the sheet member can be reliably punched even when the contour line of the product is complicated.

  The pressing operation of the sheet member punching device 1 configured as described above will be described with reference to FIGS. 1 (A), (B), (C), and FIGS. 3 (A), (B). A multiple sheet member is set at a predetermined position on the die plate 31 of the lower mold 3.

  When pressing is started with a press mold 1 (see FIGS. 1C and 3B) in which the upper mold 2 and the lower mold 3 mounted on the press machine are closed, the upper mold 2 slides. Rise by. As the upper die 2 moves away from the lower die 3, as shown in FIGS. 1B and 3A, first, four washers 36b (see FIG. It protrudes from the die-matching surface of the die plate 31 by the generated force. The protrusion amount C protruding from the die mating surfaces of the die plates 31 of the four washers 36b is preferably set to 2 to 3 mm in order to shorten the stroke length of the press mold. Further, the dimensional error of the protruding amount of each washer 36b is a value that can be repelled so that the four compression coil springs 34 of the lower mold 3 support the die mating surface of the punch plate 23 in a balanced manner, for example, ± 0.2 mm. Is good.

  When the upper die 2 moves to the top dead center (see FIG. 1A), the slide starts to descend, so that the punch plate 23 of the upper die 2 is moved as shown in FIGS. 1B and 3A. The mold matching surface comes into contact with the washer 36 b of the lower mold 3. Further, when the upper die 2 is lowered and the washer 36 b moves in the direction of the die-matching surface of the die plate 31 against the elastic force of the compression coil spring 34, the first die provided on the punch plate 25 of the upper die 2. The cutting edges of the punch 23b and the second punch 23c bite and punch into the multi-sheet member, and the half-cut cutting blade 23f half-cuts the multi-sheet member. Here, the half-cutting of the multiple sheet member means that the half-cut cutting blade 23f bites into only the surface base material and the adhesive of the multiple sheet member to form a half-cut line on the multiple sheet member.

  Further, when the upper die 2 is lowered, as shown in FIGS. 1C and 3B, the cutting edge of the punching blade 23a bites into the multiple sheet member, and the contour line of the product can be punched out. At this time, the punching blade groove 31a of the lower die 3 into which the punching blade 23a of the upper die 2 is fitted is formed with a groove width that prevents the multiple sheet member from being bent due to the pressing force of the punching blade 23a and causing defective punching. Therefore, the multiple sheet member can be surely punched out with the contour line of the product.

  Moreover, it is good to fix the press member (not shown) for pressing down a sheet | seat member at the time of press work to the punch plate 23. FIG. The pressing member is preferably a pad made of urethane, rubber or the like, and is disposed in the vicinity of the punching blade 23a, the first punch 23b, the second punch 23c, and the half-cutting cutting blade 23f, so that the sheet member can be used during press working. It can prevent shifting.

  According to the sheet member punching device 1 of the present invention configured and operated as described above, the punching blade 23a formed in a shape for punching the contour line of the product on the sheet member is integrated with the punch plate 23. A punching blade groove 31a is formed on the die plate 31 along a contour formed by punching the contour of the product of the punching blade 23a, and the punching blade groove 31a is formed by the upper die 2 and the lower die 3 respectively. When the punching blade 23a is fitted and pressed into the sheet member at the time of pressing, the sheet member is formed with a groove width so that the punching blade 23a is bent by the pressing force of the punching blade 23a and does not cause a punching failure. Even without using the sheet member, the sheet member can be reliably punched with the punching blade 23a.

  Therefore, it is possible to prevent the number of workers from increasing and the material cost from increasing, and the punch plate 23 and the punching blade groove 31a formed by integrating the punching blade 23a are formed. A steel material can be used for the die plate 31, and further, it is possible to prevent the sharpness of the punch hole from being lowered and the half-cut depth from being changed.

  Thus, since the steel plate can be used for the punch plate 23 formed by integrating the punching blade 23a and the die plate 31 formed with the punching blade groove 31a, the punch plate 23 of the upper die 2 can be used. The provided punching blade 23a, the second punch 23c, the cutting blade for half cut 23f, and the cutting blade groove 31a of the lower die 3 are cut by an end mill or the like to form a plate made of a steel material of the mold. Cutting using a cutting blade forming method such as a sculpture mold is suitable in terms of increasing the processing accuracy, but depending on the processing accuracy, grinding, die-cutting electric discharge processing, wire cut electric discharge processing and laser processing may be used. In the case of wire cut electric discharge machining and laser machining, the punching blade groove 31a can be formed by fitting the inserts together.

  In the sheet member punching device 1 described above, the multiple sheet member is pressed. However, the present invention is not limited to this, and it can also be used for a single-layer sheet member such as a gasket or packing.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

DESCRIPTION OF SYMBOLS 1 ... Sheet member punching device 2 ... Upper die 23 ... Punch plate 23a ... Punching blade 3 ... Lower die 31 ... Die plate 31a ... Punching blade groove 34 ... Elastic body

Claims (4)

A punching blade that is formed of an upper die that is detachably fixed to a slide of a press machine, and a lower die that is detachably fixed to a bolster of the press machine, and is formed in a shape for punching a contour line of a product on a sheet member. A punching device for a sheet member in which the upper mold is moved up and down by the slide for press punching,
The upper mold includes a punch plate made of a steel material in which the punching blade is integrated and provided toward the lower mold,
The lower die is a die made of a steel material, which is disposed opposite to the punch plate, and has a punching blade groove along a contour formed by punching the contour line of the product in the sheet member of the punching blade. With plates,
When the punching blade fits into the punching blade groove when the upper die and the lower die are pressed to punch the sheet member, the sheet member is bent by the pressing force of the punching blade and does not cause a defective punching. A sheet member punching device having a groove width as described above.   The lower mold includes a plurality of elastic bodies that impart elastic force to the punch plate of the upper mold, and the plurality of elastic bodies, when contacting the die-matching surface of the punch plate, 2. The punching device for a sheet member according to claim 1, wherein the punch plate and the die plate are arranged in a balanced manner so that the parallelism between the punch plate and the die plate is maintained.   The punching device for a sheet member according to claim 1 or 2, wherein a pressing member for pressing the sheet member during pressing is fixed to the punch plate.   The sheet member punching device according to any one of claims 1 to 3, wherein the elastic body is a compression coil spring.

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