JP6328512B2 - Punching blade for punching holes, blade mold for punching holes, and punching method - Google Patents

Description

  The present invention relates to a punching blade for punching holes capable of smoothly discharging a punched piece generated by punching a raw material sheet, a blade die for punching holes incorporating the punching blade for punching holes, and the punched hole The present invention relates to a punching method using a cutting blade.

  In punching a raw material sheet with a punching die for punching holes, it is necessary to smoothly discharge the punched waste generated in the scrap passage of the punching blade for punching holes along the scrap discharge passage communicating with the scrap passage. If there is a discharge failure of the punched waste, such as when the punched waste is separated from the cutting edge side of the waste passage and flows back to the product sheet side in the anti-scrap discharge direction, the work efficiency of the punching hole is reduced. This causes inconveniences such as lowering and mixing of punched waste into the punched product sheet.

  For the above-mentioned problem, when punching holes in a raw material sheet using a punching hole die as a lower die, the punching blade for punching holes is heated to soften the punching residue in the residue passage. Then, a method of smoothly dropping the punched waste in the waste passage in the direction of the waste discharge path (Patent Document 1), and using the punching hole cutting tool as an upper die or a lower die, When applying, a vacuum device is arranged on the side of the waste discharge passage, and the waste passage of the punching blade for punching holes is sucked in the waste discharge passage direction, so that the waste waste in the waste passage is pneumatically conveyed along the waste discharge passage. The method (Patent Document 2 and Patent Document 3), and further, when performing a punching process on the raw material sheet using the punching tool for the punching hole as a lower mold, the punching process for the punching hole is performed on the raw material sheet. When applied A method is proposed in which the punched waste is sometimes divided and cut into two or more parts by a waste splitting auxiliary blade, whereby the scraped waste in the waste passage is smoothly dropped in the direction of the waste discharge path in a split state (Patent Document 4), etc. As reported.

  When the punched hole cutting die is used as a lower die, the punched waste generated in the scrap passage of the punched punching blade is urged in the direction of the scrap discharge path by gravity. It is considered that the means such as heat softening of the residue, vacuum suction, and divided dropping are combined with the action of the gravity to promote the discharge of the residue. However, even in the above case, when the punched debris in the debris passage lacks elasticity such as a thin and thin film, and the area is relatively large, the debris is retained in the debris passage. It is difficult to sequentially drop the waste from the waste passage to the waste discharge passage, and the product is separated from the waste waste passage direction, that is, from the cutting edge side of the waste passage by wind pressure or press vibration during punching. It becomes easy to move to the seat side.

  On the other hand, when the above-mentioned punching hole processing die is used as an upper die, the punched debris generated in the debris passage of the punching punch for punching holes is biased in the anti-scrap discharge direction by gravity, contrary to the above. Therefore, even if the extracted waste is biased by vacuum suction or the like in the direction of the waste discharge path, it is separated from the cutting edge side of the waste path in the anti-removal discharge direction and falls to the product sheet side. In particular, the above-mentioned problem is further expanded when the punched dregs lack elasticity such as a thin and thin film, and the area is relatively large. It becomes extremely difficult.

Japanese Patent Laid-Open No. 05-15495 JP 2006-150579 A JP 2010-52091 A JP 2011-56610 A

  The problem to be solved by the present invention is that, in view of the problems of the above-mentioned prior art, when using a punched hole cutting tool as a lower mold when punching a raw material sheet using a punched hole cutting tool Of course, when it is used as an upper die, the punched waste generated in the scrap passage of the punching blade for punching holes is thin and lacks elasticity like a thin film, and the area is relatively small. Even when it is large, the swarf can be discharged along the swarf passage while securely holding the swarf in the swarf passage and preventing reverse flow in the direction of the anti-swarf discharge path due to wind pressure, press vibration, or the like during punching. A punching blade for punching holes that can be moved in the direction of the road and discharged from the waste discharging path by a biasing means such as gravity or vacuum suction, and for punching holes incorporating the punching holes for punching holes Blade type and And to provide a drain hole machining method using a punching drilling blade type.

  The punching blade for punching hole processing according to the present invention is used by being incorporated in a punching die for punching hole processing as described in claim 1, and is provided in a loop shape having a punching blade tip at an edge and having a dregs passage inside. In the punching blade for punching holes, the cutting edge that is oriented in the same direction as the punching blade edge and cut into the peripheral edge of the punching hole is formed on the inner surface of the punching blade tip of the punching hole processing A dregs engagement blade provided at the edge is projected.

  A punching blade for punching holes according to another aspect of the present invention is used by being incorporated in a punching die for punching holes as described in claim 2, and includes a punching blade tip at an end edge and a waste passage on the inside. In a punching blade for punching a hole having a loop shape, the inner surface of the punching edge of the punching hole for the punching hole is oriented in the same direction as the punching blade tip and cut into the peripheral edge of the punching waste during punching Provided with a cutting edge at the edge and oriented in the same direction as the punching cutting edge, connected to the cutting cutting edge beyond its height, and provided with a piercing point at the end that is pierced at the peripheral edge of the punching hole when punching holes Further, the present invention is characterized in that a dregs engaging blade protrudes.

  Further, as described in claim 3, the punching die for punching holes according to the present invention communicates with the punching blade for punching holes according to claim 1 and the waste passage of the punching blade for punching holes. And at least a waste discharge path for leading the waste residue generated in the waste passage to discharge, and a waste biasing means for biasing the waste residue generated in the waste passage toward the waste discharge passage. A feature of the present invention is that the waste generated in the waste passage is discharged into the waste discharge passage by punching.

  According to another aspect of the present invention, there is provided a punching blade for punching holes according to another aspect of the present invention, wherein the punching blade for punching holes according to claim 2 and the waste passage of the punching blade for punching holes are provided. A waste discharge passage that communicates with the waste passage and guides the waste residue generated in the waste passage to discharge, and a waste biasing means that biases the waste residue generated in the waste passage toward the waste discharge passage. A feature of the present invention is that the waste residue generated in the waste passage is discharged to the waste discharge passage by punching the raw material sheet.

  The punching method according to the present invention is a punching method using the punching die for punching according to claim 3, and the raw material by the punching blade for punching as described in claim 5. In continuous punching of a sheet, punched scraps that are sequentially generated in the scrap passage of the punching punch for punching are cut by the cutting edge of the scrap engaging blade at each peripheral edge thereof, It is characterized in that the inside of the passage is fed forward in the direction of the waste discharge path and is detached from the waste engaging blade.

  According to the punched hole processing method, the punched scraps that are sequentially generated in the scrap passage are cut by the cutting edge of the scrap engaging blade at each peripheral edge along with the punched hole processing. In the notched state, the punched debris is not only elastically contacted with the inner wall of the debris passage, but also in the debris passage due to the engagement at the peripheral edge with the debris engaging blade by the incision of the cutting blade tip. It is held in a state in which it does not easily flow backward in the discharge path direction.

  Further, the punched scrap is cut by the cutting edge of the scrap engaging blade as described above, and is forwardly fed in the scrap discharge path direction in the scrap passage, and is detached from the scrap engaging blade and It passes through the residue engaging blade, but after passing the residue engaging blade, the residue engaging blade acts as a non-return protrusion protruding into the residue passage. Due to the action of the waste engaging blade as the projection for use, the backflow of the punched waste in the anti-scrap discharge direction is prevented in combination with the elastic contact with the inner wall of the waste passage.

  Further, another aspect of the punching method according to the present invention is a punching method using the punching die for punching according to claim 4, wherein the punching is performed as described in claim 6. In the continuous punching of the raw material sheet by the punching blade for punching, the punched scraps that are sequentially generated in the scrap passage of the punching punch for punching holes are first pierced by the piercing tip of the scraping engagement blade at their respective peripheral portions. While being stabbed and subsequently being cut by the cutting edge of the dregs engagement blade, the dregs passage is forwardly fed in the dregs discharge path direction and detached from the dregs engagement blade.

  According to the punched hole processing method, the punched scraps that are sequentially generated in the scrap passage are pierced by the piercing tip of the scraper engaging blade at each peripheral edge along with the punched hole processing, and then by the cutting edge. In the state of being cut and pierced by the piercing tip and the cutting state by the cutting blade edge, the punched residue is not only elastically contacted with the inner wall of the residue passage, but also the piercing tip and the cutting blade tip. Due to the engagement at the peripheral edge with the waste engaging blade by cutting, the waste passage is held in a state in which it does not easily flow backward in the anti-removal discharge passage direction. Note that the cutting by the cutting edge with respect to the peripheral edge portion of the punched debris may be performed not only at the time of punching that causes piercing by the piercing tip but also at the time of subsequent punching such as next time.

  Further, as described above, the punched debris is pierced by the piercing tip of the debris engagement blade, and while being cut by the cutting blade tip, the debris is sequentially fed in the debris discharge path direction, and the debris engagement The slag engagement blade is separated from the blade and passes through the debris engagement blade. After the debris engagement blade has passed, the debris engagement blade acts as a non-return protrusion protruding into the debris passage. Due to the action of the residue engaging blade as the non-return protrusion, the withdrawal residue is coupled with the elastic contact with the inner wall of the residue passage to prevent backflow of the removal residue in the anti-removal discharge direction. become.

  There is no special restriction | limiting in the form of the said blade type for punching holes, For example, a Thomson blade type, an etching blade type, an engraving blade type etc. are selected as needed. Further, as the waste energizing means, known means such as gravity, vacuum suction, a transfer mechanism using an actuator, or a combination thereof is appropriately employed.

  There is no particular limitation on the shape of the cutting edge or the stab-engaging blade provided with the piercing point and the cutting edge as long as it can prevent the backflow of the punched residue, and the shape, structure, size, cutting edge of the cutting edge The type and form, the type and form of the piercing tip, etc. can be freely selected as necessary. In the residue engaging blade provided with both the piercing point and the cutting edge, for example, the piercing point may be formed continuously at the tip of the cutting edge. Note that the type and form of the punching blade tip in the punching blade for punching holes in which the debris engagement blade is projected is not particularly limited as long as it does not hinder the backflow prevention action of the punched debris, such as a single blade, The angle of inclination of the cutting edge may be different from the product sheet side and the punching residue side, or may be either a double-edged blade, a multi-staged blade, or the like that is the same on both sides, or a modification thereof.

  The dregs engaging blade may project integrally with the inner surface of the punching blade tip of the punching blade for punching holes, or may project as a separate member. Regarding the projecting angle of the cutting blade engaging blade with respect to the inner surface of the punching blade tip of the punching hole processing, that is, the cutting angle of the cutting blade tip with respect to the peripheral edge portion of the punching hole in the punching hole processing, the backflow prevention of the punching residue is performed. There is no special limitation as long as the effect can be obtained, and for example, a right angle (90 degrees) may be adopted.

  Further, the waste engaging blade is provided at one place of the punching blade for punching hole processing according to the loop shape and loop size of the punching blade for punching hole processing and the material of the raw material sheet, etc. It is provided in an arrangement that can hold the punched debris in a well-balanced manner, for example, facing in front or facing in an oblique direction.

  In the invention according to claim 1, when performing the punching process on the raw material sheet by performing the punching process using the punching die for punching process in which the punching blade for punching process according to the present invention is incorporated, Of course, when using the punching tool for the punching hole as the lower die, as well as when using it as the upper die, the film that has a thin and thin waist in the scrap passage of the punching blade for punching holes Even when the area is relatively large, such as the above, the punched debris is securely held in the debris passage by the action of the debris engaging blade provided with the cutting edge at the edge and the punched hole. While preventing back flow in the direction of the anti-debris discharge path due to wind pressure or press vibration during processing, the debris discharge path is moved along the debris path in the direction of the debris discharge path, and the debris urging means such as gravity or vacuum suction Discharged from It is possible to make.

  In the invention according to claim 2, when performing the punching process on the raw material sheet by performing the punching process using the punching die for punching process in which the punching blade for punching process according to the present invention is incorporated, Of course, when using the punching tool for the punching hole as the lower die, as well as when using it as the upper die, the film that has a thin and thin waist in the scrap passage of the punching blade for punching holes As described above, even when the area is relatively large, the above-mentioned waste passage is pierced by the action of the waste-engaging blade having a pierced tip at the end and a cutting edge at the end. It is securely held inside and prevents backflow in the anti-removal discharge direction due to wind pressure, press vibration, etc. when punching holes, and moves along the debris passage in the direction of the debris discharge path so that gravity, vacuum suction, etc. Cass energizing It is possible to discharge from the slag discharge passage by stage.

  In the invention according to claim 3, when the punching process is performed on the raw material sheet by performing the punching process using the punching die for punching process according to the invention, as described above, When using the blade mold as the lower mold, as well as when using it as the upper mold, the punched residue generated in the punching passage for punching holes is thin and elastic like a thin film. Even when the area is relatively large and the area is relatively large, the punched residue is securely held in the residue passage by the action of the scraping blade provided with the cutting edge at the edge, and the wind pressure at the time of punching is processed. And moving in the direction of the scum discharge path along the slag passage while preventing backflow in the direction of the anti-scum evacuation path due to press vibration, etc., and discharging it from the scum discharge path by a squeezing means such as gravity or vacuum suction Is possible .

  In the invention according to claim 4, when the punching process is performed on the raw material sheet by performing the punching process using the punching die for punching process according to the invention, as described above, When using the blade mold as the lower mold, as well as when using it as the upper mold, the punched residue generated in the punching passage for punching holes is thin and elastic like a thin film. Even when the area is relatively large and the area is relatively large, the punched stab is securely inserted into the slag passage by the action of the stab engaging blade provided with a piercing tip at the end and a cutting edge at the end. While holding and preventing backflow in the direction of the anti-dust discharge path due to wind pressure or press vibration during punching holes, it is moved in the direction of the debris discharge path along the above-mentioned debris path, and the energization of the debris such as gravity and vacuum suction Waste discharge by means It is possible to discharge the.

  In the invention according to claim 5, when the punching process is performed on the raw material sheet by performing the punching process using the punching process method according to the invention, as described above, When using it as a lower mold, as well as when using it as an upper mold, the punched waste generated in the scrap passage of the punching blade for punching holes is thin and elastic like a thin film. Even when there is a chip or a relatively large area, the punched residue is securely held in the residue passage by the action of the residue engaging blade provided with a cutting edge at the edge, and the wind pressure and press during punching are processed. It is possible to move in the direction of the scum discharge path along the slag passage while preventing backflow in the direction of the anti-scum evacuation path due to vibration or the like, and to discharge from the scum discharge path by a squeezing means such as gravity or vacuum suction. Is

  In the invention according to claim 6, when performing the punching process on the raw material sheet by performing the punching process using the punching process method according to the invention, as described above, When using it as a lower mold, as well as when using it as an upper mold, the punched waste generated in the scrap passage of the punching blade for punching holes is thin and elastic like a thin film. Even when the chip is chipped or has a relatively large area, the punched debris is securely held in the debris passage by the action of the debris engaging blade having a piercing pointed end and a cutting edge at the end. At the same time, while preventing backflow in the direction of the anti-debris discharge path due to wind pressure, press vibration, etc. during punching holes, it is moved along the debris passage in the direction of the debris discharge path, and by a debris urging means such as gravity or vacuum suction Waste discharge path It is possible to et discharged.

FIG. 1 exemplifies a punching blade for punching holes according to the present invention and a blade die for punching holes in which the punching hole is incorporated. FIG. 1 (A) is a longitudinal sectional view, FIG. 1 (B) is a bottom view, Fig. (C) is an enlarged view of one of the left side engaging blades in Fig. (A). FIG. 2 shows the process of punching using the punching tool for punching shown in FIG. 1. FIGS. 2 (A), (B) and (C) are respectively before and after punching. It is an explanatory sectional view of each state after time and after punching. FIG. 3 shows another embodiment of the residue-engaging blade obtained by deforming the residue-engaging blade in the hole-drilling blade mold shown in FIG. 1, and FIG. 3 (A) has a cutting edge separated from the punching edge. FIG. 5B is an enlarged view of the one-side dregs engaging blade formed by piercing the concave cutting edge and connecting the tip. FIG. 4 shows a process of punching using a punching hole die having a punching hole for punching with a dregs engaging blade shown in FIG. 3 (B). B) and (C) are explanatory sectional views of respective states before punching, at the time of punching, and after punching. FIG. 5 is the same form as the punching blade for punching holes and the cutting tool for punching holes shown in FIG. 1 and uses a conventional punching tool for punching holes that does not have a dregs engaging blade. (A), (B), and (C) are explanatory sectional views of each state before punching, at the time of punching, and after punching, respectively.

  Below, this invention is demonstrated based on an Example, Finally, the comparative example which is not provided with the dregs engagement blade is illustrated.

[Configuration of the edge die for punching holes according to Example 1]
As shown in FIGS. 1 (A) to 1 (C), a punching hole die 11 according to Example 1 is connected to a press device (not shown) as an upper die so as to be movable up and down, and is installed below. The raw material sheet 31 conveyed intermittently on the table 21 is moved up and down for punching.

  The punching die 11 for punching holes is provided with a punching blade 12 for punching a hole in a rectangular loop (only the opposite long sides are shown), and a punching blade tip is provided at the lower edge of the punching blade 12 for punching holes. 12a is formed, and a waste passage 13 is formed inside. The punching blade tip 12a is composed of double-edged blades having an inclination angle on the punching residue 31b side larger than an inclination angle on the product sheet 31a side in order to promote separation of the punching residue 31b from the product sheet 31a. Further, the waste passage 13 holds a waste residue 31b punched from the raw material sheet 31 and extends somewhat upward from the waste retention portion 13a, and extends from the waste retention portion 13a and from the waste retention portion 13a. It is comprised from the waste storage part 13b which temporarily stores the extracted waste 31b extruded sequentially. Further, the punching hole cutting edge 11 is provided with a waste discharge path 14 that communicates with the waste passage 13 at the waste storage portion 13b and guides the discharge waste 31b from the waste storage portion 13b to the discharge. A vacuum suction device 15 is connected to the waste discharge passage 14 as a waste urging means for vacuum-sucking and discharging the extracted waste 31b in the waste passage 13 to the waste discharge passage 14.

  On the inner surface of the punching blade tip 12a of the punching blade 12 for punching holes, the scraper engaging blade 51 faces the inside of the loop so as to be opposed to each other at a substantially intermediate position on the long side and short side of the rectangular loop. (In FIGS. 1A and 1B, only the opposing long side portions are shown). The scrap engaging blade 51 is provided with a double-edged linear cutting edge 51a at the lower end that faces the same direction as the punching edge 12a and is connected to or substantially connected to the punching edge 12a at the end, and the cutting edge 51a When the punching hole is processed, the peripheral edge of the punching piece 31b is cut in a substantially right angle direction.

  In the punching process, the vertical movement of the punching hole cutting tool 11 relative to the raw material sheet 31 on the base 21 may be relative, and if necessary, the punching hole cutting tool 11 and The base 21 may be moved up and down. The punching hole cutting edge 11 has a punching edge 12a of the punching hole 12 for punching holes and a cutting edge 51a of the cutting engagement blade 51 as a lower mold, instead of being used as the upper mold as described above. May be used so as to be oriented upwards. Further, the arrangement of the residue engaging blade 51 is not limited to the above embodiment, and is arranged according to the loop shape and loop size of the punching blade 12 for punching holes, the material of the raw material sheet 31, and the like. The number, arrangement location, arrangement form, and the like may be selected as appropriate. Further, the form of the cutting edge 51a of the residue engaging blade 51, the cutting angle of the cutting edge 51a with respect to the peripheral edge portion of the extraction residue 31b at the time of punching, and the like are not limited to the above embodiment. . Further, the cutting edge 51a of the residue engaging blade 51 is not limited to a linear shape, and may be a curved shape curved in the horizontal direction or the vertical direction, for example.

[Drilling hole processing method using a punching hole die according to Example 1]
As shown in FIG. 2 (A), the punching die 11 for punching holes has the punching edge 12a of the punching hole 12 for punching holes and the cutting edge 51a of the cutting engagement blade 51 directed downward, and the next punching hole is formed. An unprocessed raw material sheet 31 is conveyed and placed on a base 21 provided below and held upward for processing.

  In addition, a plurality of punched chips 31b generated by a plurality of punching holes so far are retained in the residue holding part 13a and the residue storage part 13b of the residue passage 13 in the punching blade 12 for punching holes. (Only the staying state in the residue holding part 13a is shown). Some of the stayed wastes 31b are elastically contacted with the inner wall of the waste passage 13 and the peripheral edge thereof is cut by the cutting edge 51a of the waste engaging blade 51. As a result, it is held in the residue passage 13 while being engaged with the residue engagement blade 51, and is prevented from flowing back in the direction opposite to the residue discharge passage.

  Further, the other punched debris 31b is detached from the debris engagement blade 51 and stays in the debris holding portion 13a and debris storage portion 13b after passing through the debris engagement blade 51 as the non-return protrusion. By the action of the waste engaging blade 51, the backflow in the anti-scrap discharge direction is prevented in combination with the elastic contact with the inner wall of the waste passage 13.

  Next, as shown in FIG. 2B, the punching blade tip 11a of the punching blade 12 for punching holes is lowered and the raw material sheet 31 placed on the base 21 is moved down. As a result, the raw material sheet 31 is punched and separated into a product sheet 31a on the outside of the punching blade edge 12a and a punching residue 31b on the inside of the punching blade edge 12a.

  As described above, the raw material sheet 31 is punched and punched by the punching blade edge 12a of the punching blade 12 for punching hole processing, and at the same time, on the peripheral portion of the punching waste 31b inside the punching blade edge 12a. In contrast, cutting with the cutting edge 51a of the residue engaging blade 51 is performed.

  Further, as the raw material sheet 31 is driven by the punching blade edge 12a, punched and cut by the cutting blade edge 51a with respect to the peripheral edge of the punched residue 31b, the cutting edge 51a of the waste engaging blade 51 cuts in the waste passage 13. The already-extracted dregs 31b engaged and held on the dregs engaging blade 51 in the inserted state are sequentially fed in the dregs passage 13 in the depth direction, and further, the dregs engaging blade 51 is detached. It will be.

Subsequently, as shown in FIG. 2 (C), the punching die 11 for punching holes is raised, and the punching blade 12 for punching holes is replaced with the existing punching scrap 31b and the latest punching scrap 31b just punched. 2B, the product sheet 31a after the punched hole is left on the base 21, and the product sheet 31a after the punched hole is subsequently lifted. It is conveyed to.
Thereafter, the punching hole cutting edge 11 returns to the state shown in FIG. 2A and prepares for the next punching hole processing.

[Configuration of Cutting Hole Cutting Die according to Example 2]
The punched hole processing blade mold 111 according to the second embodiment is different from the first embodiment in the form of the residue engaging blade 151 projecting from the inner surface of the punching blade tip 12a of the punching blade 12 for punching holes. Is basically the same as that of the first embodiment.

  That is, in the punching hole cutting edge 111 according to the second embodiment, as shown in FIG. 3A, the inner surface of the punching blade edge 12a of the punching hole cutting blade 12 has the same direction as the punching blade edge 12a. A scrap engaging blade 151 provided with a cutting edge 151a that is clearly connected to the punching blade edge 12a without being connected to the punching edge 12a while projecting.

[Drilling hole processing method using a punching hole die according to Example 2]
This is basically the same as the punched hole processing method described above using the punched hole processing die according to the first embodiment.

[Configuration of Cutting Hole Cutting Die according to Example 3]
The punched hole machining blade die 211 according to the third embodiment is different from the first embodiment in the form and action of the residue engaging blade 251 protruding from the inner surface of the punching blade tip 12a of the punching blade 12 for punching holes. Other configurations are basically the same as those in the first embodiment.

  That is, in the punched hole processing blade die 211 according to the third embodiment, as shown in FIG. 3B, the long side of the rectangular loop facing the inner surface of the punching blade tip 12a of the punching blade 12 for punching hole is used. On the side, the residue engaging blades 251 are provided so as to face each other (only the opposite long side portions are shown). The scrap engaging blade 251 is provided with a double-edged concave cutting edge 251a facing the same direction as the punching blade edge 12a and connected to the punching blade edge 12a at the end, and the same as the punching blade edge 12a. The outer end portion is provided with a piercing point 251b that faces in the direction and is connected to the cutting blade edge 251a beyond its height. The cutting blade edge 251a is cut in a substantially perpendicular direction to the peripheral edge portion of the punching residue 31b during punching, and the piercing point 251b is formed in the peripheral edge portion of the punching waste 31b by the cutting blade edge 251a during punching processing. Prior to the incision, it is stabbed in a substantially vertical direction.

  In the punching process, the vertical movement of the punching hole cutting tool 211 relative to the raw material sheet 31 on the base 21 may be relative, and if necessary, the punching hole cutting tool 211 and The base 21 may be moved up and down. Instead of using the upper die as described above, the punching hole cutting die 211 is used as a lower die, as a punching blade edge 12a of the punching blade 12 for punching holes and a cutting blade edge 251a of the cass engagement blade 251. And it may be used so that the piercing tip 251b is arranged facing upward. Further, the aspect of the residue engaging blade 251 is not limited to the above embodiment, and is arranged according to the loop shape and loop size of the punching blade 12 for punching holes, the material of the raw material sheet 31, and the like. The number, arrangement location, arrangement form, and the like may be selected as appropriate. Further, the shape of the cutting edge 251a of the residue engaging blade 251 and the cutting angle of the edge 251a to the peripheral portion of the extraction waste 31b during the punching process, and the shape of the piercing point 251b of the residue engagement blade 251 and The piercing angle of the piercing point 251b to the peripheral edge of the punched portion 31b at the time of punching is not limited to the above embodiment.

[Drilling hole processing method using the punching hole for die according to Example 3]
As shown in FIG. 4A, the punching die 211 for punching holes has the punching blade edge 12a of the punching blade 12 for punching holes and the cutting edge 251a and the piercing point 251b of the sag engaging blade 251 facing downward. Thus, an unprocessed raw material sheet 31 is conveyed and placed on a base 21 provided below and held upward for the next punching process.

  In addition, a plurality of punched chips 31b generated by a plurality of punching holes so far are retained in the residue holding part 13a and the residue storage part 13b of the residue passage 13 in the punching blade 12 for punching holes. (Only the staying state in the residue holding part 13a is shown). Among the staying punched pieces 31b, some of the punched wastes 31b are elastically brought into contact with the inner wall of the residue passage 13 and the peripheral edge thereof is pierced by the piercing point 251b of the scab engaging blade 251. In addition, it is cut by the cutting blade edge 251a and held in the waste passage 13 while being engaged with the waste engagement blade 251, thereby preventing the reverse flow in the anti-scrap discharge direction.

  Further, the other punched debris 31b is detached from the debris engagement blade 251 and stays in the debris holding portion 13a and debris storage portion 13b after passing through the debris engagement blade 251, and serves as the non-return protrusion. Due to the action of the waste engaging blade 251, the backflow in the anti-scrap discharge direction is prevented in combination with the elastic contact with the inner wall of the waste passage 13.

  Next, as shown in FIG. 4 (B), the punching blade tip 211 of the punching hole punching blade 12 is lowered on the raw material sheet 31 placed on the base 21 while the punching blade die 211 is lowered. As a result, the raw material sheet 31 is punched and separated into a product sheet 31a on the outside of the punching blade edge 12a and a punching residue 31b on the inside of the punching blade edge 12a.

  As described above, the raw material sheet 31 is punched and punched by the punching blade edge 12a of the punching blade 12 for punching hole processing, and at the same time, on the peripheral portion of the punching waste 31b inside the punching blade edge 12a. On the other hand, the stab engagement blade 251 is pierced by the piercing point 251b and cut by the cutting edge 251a.

  Further, as described above, in the residue passage 13, it is stabbed by the piercing tip 251b of the residue engagement blade 251 and engaged on the residue engagement blade 251 while being cut by the cutting blade tip 251a. The already-extracted dregs 31b that has been held is fed forward in the dregs passage 13 in the depth direction, and further, the dregs engaging blade 251 is detached.

Subsequently, as shown in FIG. 4 (C), the punching die 211 for punching holes is raised, and the punching blade 12 for punching holes is replaced with the existing punching scrap 31b and the latest punching scrap 31b just punched. 4B, the product sheet 31a after the punched hole is left on the base 21, and the product sheet 31a after the punched hole is subsequently lifted. It is conveyed to.
Thereafter, the punched hole cutting edge 211 returns to the state shown in FIG. 4A and prepares for the next punched hole processing.

[Comparative example]
The punched hole cutting tool 311 according to the prior art illustrated in FIG. 5 is different from the punched hole cutting tool molds 11, 111, and 211 according to the first to third embodiments as described above. 3, which is the same form as the punched hole processing blade molds 11, 111, and 211 according to No. 3, and does not include the residue engaging blades 51, 151, and 251.

  That is, as shown in FIG. 5 (A), the punching blade die 311 according to the prior art has the punching blade tip 12a of the punching blade 12 for punching holes directed downward for the next punching hole processing. An unprocessed raw material sheet 31 is conveyed and placed on a base 21 held above and provided below.

  Further, in the waste holding portion 13a and the waste storage portion 13b of the waste passage 13 in the punching blade 12 for punching holes, a plurality of punched wastes 31b generated by a plurality of previous punching holes are retained. The extracted residue 31b in the residue holding part 13a is held in a curved state by the elastic contact with the inner wall of the residue holding part 13a due to their elasticity.

  Next, as shown in FIG. 5B, the punching blade tip 311 is lowered and the punching blade tip 12 a of the punching blade 12 for punching holes is placed on the raw material sheet 31 placed on the base 21. As a result, the raw material sheet 31 is punched and separated into a product sheet 31a on the outside of the punching blade edge 12a and a punching residue 31b on the inside of the punching blade edge 12a.

  As described above, the punched blade tip 12a of the punching blade 12 for punching holes is punched and punched into the raw material sheet 31, and the existing punched residue 31b held by the scrap holding portion 13a is accordingly accompanied. Is sequentially fed in the depth direction in the residue passage 13.

Subsequently, as shown in FIG. 5C, the punching die 311 for punching holes is raised, and the punching blade 12 for punching holes is used as an existing punching piece 31b and the latest punching piece 31b just punched. 5B, the product sheet 31a after the punched hole is left on the base 21, and the product sheet 31a after the punched hole is subsequently lifted. It is conveyed to.
After that, the punching hole cutting tool 311 returns to the state shown in FIG.

  However, in the above prior art, the punched residue 31b in the state shown in FIGS. 5A and 5C is in the process of punching holes even when the vacuum suction device 15 serving as a residue biasing means is in operation. Due to the wind pressure, press vibration, etc., it is in a state where it is easily separated and dropped from the debris passage 13 in the direction opposite to the debris discharge passage, and the punched debris 31b is particularly elastic such as a thin thin film. The occurrence of the phenomenon is almost inevitable when the chip is missing or the area is relatively large.

  It should be noted that the present invention is not limited to the above-described embodiments, and many other broad embodiments other than those described above are possible by various modifications, combinations, and the like within the spirit and scope of the present invention. Needless to say, this is possible.

11 Blade type for punching holes (Example 1)
DESCRIPTION OF SYMBOLS 12 Punching blade for punching holes 12a Punching blade tip 13 Waste passage 13a Waste holding portion 13b Waste storage portion 14 Waste discharge passage 15 Vacuum suction device 21 Base 31 Raw material sheet 31a Product sheet 31b Removal waste 51 Waste engagement blade 51a Cutting edge 111 Blade type for punching holes (Example 2)
151 Waste engaging blade 151a Cutting edge 211 Cutting edge for punching holes (Example 3)
251 Waste engaging blade 251a Cutting edge 251b Piercing tip 311 Cutting edge for punching holes (conventional technology)

Claims (6)

  A loop-shaped punching blade having a punching blade edge at the end and having a punching passage on the inside thereof, which is incorporated in a punching die for punching holes. Punching hole machining characterized in that a side surface is provided with a cutting edge engaging blade having a cutting edge that is oriented in the same direction as the punching cutting edge and is cut into the peripheral edge of the cutting piece during punching. For punching blades.   A loop-shaped punching blade having a punching blade edge at the end and having a punching passage on the inside thereof, which is incorporated in a punching die for punching holes. The side surface is provided with a cutting edge that is oriented in the same direction as the punching blade edge and is cut into the peripheral edge of the punching piece during punching, and is oriented in the same direction as the punching blade edge, and has a height at the cutting edge. A punching blade for punching holes, characterized in that a cutting edge engaging blade having a piercing pointed end that is inserted into the peripheral edge of the punching punch during punching is projected.   2. A punching blade for punching holes according to claim 1, a waste discharge passage communicating with the waste passage of the punching blade for punching holes and guiding the waste residue generated in the waste passage to discharge, and the waste passage At least a waste urging means for urging the waste generated in the waste discharge direction, so that the waste generated in the waste passage is discharged to the waste discharge passage by punching the raw material sheet. A blade type for punching holes.   3. A punching blade for punching holes according to claim 2, a waste discharging passage communicating with the waste passage of the punching blade for punching holes, and leading the waste waste generated in the waste passage to discharge, and the waste passage At least a waste urging means for urging the waste generated in the waste discharge direction, so that the waste generated in the waste passage is discharged to the waste discharge passage by punching the raw material sheet. A blade type for punching holes.   A punching method using the punching die for punching holes according to claim 3, wherein in the continuous punching of the raw material sheet by the punching blade for punching holes, the waste passage of the punching blade for punching holes Scraps that are sequentially generated in the slag are cut by the cutting edge of the slag engaging blade at each peripheral edge thereof, and are sequentially fed in the direction of the scum discharge path and detached from the slag engaging blade. A punched hole machining method characterized by being made.   5. A punching method using the punching die for punching holes according to claim 4, wherein in the continuous punching of the raw material sheet by the punching blade for punching holes, the waste passage of the punching blade for punching holes In each of the peripheral edges of the scraps that are sequentially generated in the scraper, the scraps are first pierced by the piercing tip of the scraper engaging blade, and then cut by the cutting blade tip of the scraper engaging blade. A punched hole machining method characterized by being forwardly fed in the direction of the discharge path and being detached from the residue engaging blade.

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