CN114505400A - Die for reducing burrs of double-layer split thin material lamination and blanking process - Google Patents
Die for reducing burrs of double-layer split thin material lamination and blanking process Download PDFInfo
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- CN114505400A CN114505400A CN202210172193.3A CN202210172193A CN114505400A CN 114505400 A CN114505400 A CN 114505400A CN 202210172193 A CN202210172193 A CN 202210172193A CN 114505400 A CN114505400 A CN 114505400A
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- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000003475 lamination Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 13
- 238000004080 punching Methods 0.000 claims abstract description 37
- 239000002699 waste material Substances 0.000 claims description 15
- 230000009191 jumping Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 description 8
- 238000010008 shearing Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 208000034189 Sclerosis Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention discloses a die for reducing double-layer slit thin material lamination burrs, which comprises an upper die, a lower die, a male die and a female die, wherein the upper die is provided with a first die cavity and a second die cavity; the lower die can be close to or far away from the upper die, and a stamping space is formed between the lower die and the upper die; the male die is arranged in the upper die and comprises a first stamping block and a second stamping block, the first stamping block is provided with an inner stamping surface, an arc surface and an inclined surface are arranged between the first stamping block and the second stamping block, one side of the arc surface is connected with the inner stamping surface, one side of the inclined surface is connected with the other side of the arc surface, the second stamping block is provided with an outer stamping surface, the outer stamping surface is connected with the other side of the inclined surface, and the angle formed by the intersection of the outer stamping surface and the inclined surface is more than or equal to 10 degrees and less than or equal to 20 degrees; the female die is arranged on the lower die and is opposite to the male die, and a groove for inserting the first punching block and the second punching block is formed in the female die. The invention also discloses a blanking process. The invention can reduce burrs in the blanking process, thereby facilitating the riveting, assembly and use of products.
Description
Technical Field
The invention relates to the technical field of dies, in particular to a die for reducing double-layer slit thin material lamination burrs and a blanking process.
Background
In a hardware stamping die, blanking is a process of elastic deformation, plastic deformation and fracture separation, the fracture separation section is generally called as a rough surface and burrs, and the rough surface is a part with rough surface and taper and is generated by continuous expansion and fracture of microcracks at a blade under the action of tensile stress; the burr is formed when the strip material has microcracks on the side surface near the cutting edge, and when the male die continues to descend, the generated burr is elongated and remains on the blanking part, so that the thin and long burr is generated.
In the double-layer blanking strip material, the material on the upper layer is under the pressure action of the male die, the material on the lower layer is gradually hardened by the downward extrusion of the material on the upper layer and the upward extrusion of the female die, the lamination forming part is in a state of emptying on the burr surface, when the male die descends, the waste material is bent in the space, and after the shearing is finished, thin and long burrs are generated at the position.
The production of high accurate relay five metals punching press spare part burr is inevitable, in order to solve blanking burr problem, increase deburring structure in the mould can be considered usually, the contained angle of fracture region is little in double-deck blanking strip material for traditional deburring structure, blanking in-process produces great bending moment easily, the waste material is connected weakly and is lengthened, the burr height of production is more than or equal to 0.06mm usually, the burr is long and many, thereby influence the riveting and the assembly use of product.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a die for reducing burrs of a double-layer slit sheet material lamination, which can reduce burrs during a blanking process, thereby facilitating riveting and assembling of a product.
A second object of the present invention is to provide a blanking process, which can reduce burrs during the blanking process, thereby facilitating the riveting and assembling of the product.
In order to achieve the above object, an embodiment of the present invention provides a mold for reducing burrs of a double-layer slit thin material lamination, including an upper mold, a lower mold, a male mold and a female mold;
the lower die can be close to or far away from the upper die, and a stamping space is formed between the lower die and the upper die;
the male die is arranged in the upper die and comprises a first stamping block and a second stamping block, the first stamping block is provided with an inner stamping surface, an arc surface and an inclined surface are arranged between the first stamping block and the second stamping block, one side of the arc surface is connected with the inner stamping surface, one side of the inclined surface is connected with the other side of the arc surface, the second stamping block is provided with an outer stamping surface, the outer stamping surface is connected with the other side of the inclined surface, and the angle formed by the intersection of the outer stamping surface and the inclined surface is more than or equal to 10 degrees and less than or equal to 20 degrees;
the female die is arranged on the lower die and is opposite to the male die, and a groove for inserting the first punching block and the second punching block is formed in the female die.
According to the die for reducing the lamination burrs of the double-layer slit thin material, during punching, the double-layer blanking strip is placed in the punching space, then the upper die and the lower die are close to each other, the first punching block and the second punching block punch the double-layer blanking strip, and the strength of waste materials can be increased because the angle formed by the intersection of the outer punching surface and the inclined surface is greater than or equal to 10 degrees and less than or equal to 20 degrees, so that when the double-layer blanking strip is extruded by the male die, the double-layer blanking strip is hardened, the shearing cracks are thorough, the elongation distance is small, a small bending moment is generated, the deformation area of the waste materials is reduced, and the burrs are effectively reduced.
In addition, the die for reducing the burrs of the double-layer slit thin-material lamination, which is provided by the embodiment of the invention, can also have the following additional technical characteristics:
further, the angle formed by the intersection of the outer stamping surface and the inclined surface is equal to 15 degrees.
Furthermore, the end part of the first stamping block is provided with a stamping end face, and a cambered surface is formed between the stamping end face and the inner stamping face.
Furthermore, a profiling lug for reducing the tensile stress is arranged on the female die, and the profiling lug corresponds to the inner stamping surface.
Further, the profiling lug is provided with an arc-shaped abutting surface for abutting against the overlapping part of the side edges of the double-layer blanking strip.
Furthermore, when the lower die is close to the upper die and the die is closed, the distance between the arc surface and the inclined surface and the side wall of the groove is less than 0.009mm and more than 0.005 mm.
Furthermore, the male die further comprises a third stamping block, the third stamping block is positioned on one side of the first stamping block, and a jumping-preventing groove for preventing the waste from jumping out of the die surface is formed in the outer side wall of the third stamping block.
In order to achieve the above object, a second aspect of the embodiments of the present invention provides a blanking process, including the following steps:
firstly, placing a double-layer blanking strip material in a stamping space of a die;
secondly, abutting the side edge overlapping part of the double-layer blanking strip against an arc abutting surface of the female die;
step three, enabling the lower die to be close to the upper die, and enabling the first punching block and the second punching block to punch the double-layer blanking strip;
and step four, keeping the lower die away from the upper die, and taking out the punched double-layer blanking strip.
According to the blanking process provided by the embodiment of the invention, during stamping, the double-layer blanking strip is placed in the stamping space, then the upper die and the lower die are close to each other, the first stamping block and the second stamping block stamp the double-layer blanking strip, the waste material strength can be increased because the angle formed by the intersection of the outer stamping surface and the inclined surface can be more than or equal to 10 degrees and less than or equal to 20 degrees, so that when the double-layer blanking strip is extruded by the male die, the double-layer blanking strip is hardened, shearing cracks are thoroughly generated, the elongation distance is small, a small bending moment is generated, the waste material deformation area is reduced, burrs are effectively reduced, and meanwhile, after the overlapping part of the side edge of the double-layer blanking strip is abutted against the arc abutting surface of the female die, the profiling lug reduces the tensile stress, and further reduces the generation of the burrs.
Drawings
FIG. 1 is a schematic structural view of a die for reducing burrs in a double slit sheet lamination according to an embodiment of the present invention;
FIG. 2 is an exploded view of a male and female mold according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a male mold according to an embodiment of the present invention;
FIG. 4 is a schematic view of the connection of a male mold to a female mold according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4;
FIG. 6 is a schematic view of another angular connection of a male mold to a female mold according to an embodiment of the present invention;
fig. 7 is a partially enlarged view of fig. 6.
Description of the reference symbols
An upper die 1;
a lower die 2;
the stamping die comprises a male die 3, a first stamping block 31, an inner stamping surface 311, a stamping end surface 312, a transition surface 313, a second stamping block 32, an outer stamping surface 321, an arc surface 33, an inclined surface 34, a third stamping block 35 and an anti-jumping groove 36;
the female die 4, the groove 41 and the anti-jumping bump 42;
a profiling bump 5, an arc-shaped abutting surface 51;
a double-layer punched strip 10 and an overlapping portion 101.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 7, a mold for reducing burrs of a double-layer slit thin-material lamination according to an embodiment of the present invention includes an upper mold 1, a lower mold 2, a male mold 3, and a female mold 4.
The lower die 2 can be close to or far away from the upper die 1, and a stamping space is formed between the lower die 2 and the upper die 1; the male die 3 is arranged in the upper die 1, the male die 3 comprises a first stamping block 31 and a second stamping block 32, the first stamping block 31 is provided with an inner stamping surface 311, an arc surface 33 and an inclined surface 34 are arranged between the first stamping block 31 and the second stamping block 32, one side of the arc surface 33 is connected with the inner stamping surface 311, one side of the inclined surface 34 is connected with the other side of the arc surface 33, the second stamping block 32 is provided with an outer stamping surface 321, the outer stamping surface 321 is connected with the other side of the inclined surface 34, and the angle formed by the intersection of the outer stamping surface 321 and the inclined surface 34 is more than or equal to 10 degrees and less than or equal to 20 degrees; the female die 4 is arranged on the lower die 2, the female die 4 is arranged opposite to the male die 3, and a groove 41 for inserting the first punching block 31 and the second punching block 32 is formed in the female die 4.
When punching press, arrange double-deck blanking strip 10 in the punching press space, then go up mould 1 and lower mould 2 and be close to each other, first punching press piece 31 and second punching press piece 32 carry out the punching press with double-deck blanking strip 10, because the angle more than or equal to 10 degrees of outer stamping surface 321 and 34 crossing formation in inclined plane, less than or equal to 20 degrees, can increase waste material intensity, when making 3 extrusion double-deck blanking strip 10 of terrace die, double-deck blanking strip 10 takes place the sclerosis, it takes place thoroughly to cut the crack, it is little to lengthen the distance, produce less bending moment, reduce the waste material deformation region, thereby effectively reduce the burr.
Optionally, the angle formed by the intersection of the outer punching surface 321 and the inclined surface 34 is equal to 15 degrees, and the length of the outer punching surface 321 is 0.1mm, so that the scrap strength can be increased, when the male die 3 extrudes the double-layer blanking strip 10, the double-layer blanking strip 10 is completely hardened and sheared, strong burrs can be generated, the vertical height is less than or equal to 0.02mm, and the double-layer blanking strip does not fall off.
In order to facilitate processing of the double-layer blanking bar 10, the double-layer blanking bar 10 after blanking is not easy to cut, in this example, the end portion of the first stamping block 31 is provided with a stamping end face 312, a transition face 313 is formed between the stamping end face 312 and the inner stamping face 311, and by means of the transition face 313, stress cracking of the die can be prevented, and stress concentration cracking of the double-layer blanking bar 10 is prevented.
In order to further prevent the double-layer blanking strip 10 from generating more burrs, in some examples, a profiling lug 5 for reducing the tensile stress is arranged on the female die 4, the profiling lug 5 corresponds to the inner punching surface 311, wherein the profiling lug 5 is provided with an arc abutting surface 51 against which the side overlapping portion 101 of the double-layer blanking strip 10 abuts, that is, after the double-layer blanking strip 10 is placed in the die, the arc abutting surface 51 against which the side overlapping portion 101 of the double-layer blanking strip 10 abuts is arranged, so that during blanking, the profiling lug 5 of the female die 4 gives a reverse pressure, the generation of the tensile stress is effectively reduced, and the reduction of the tensile stress and the waste bending moment of the double-layer blanking strip 10 during blanking is two major keys for reducing the generation of the burrs.
In this example, when the lower mold 2 is closed close to the upper mold 1, the distance between the arc surface 33 and the inclined surface 34 and the sidewall of the concave groove 41 is less than 0.009mm and greater than 0.005 mm. The distances between the arc surface 33 and the inclined surface 34 and the side wall of the recess 41 are blanking gaps, as shown in fig. 7, in this example, the blanking gap distance is preferably 0.005mm, and the angle a formed by the intersection of the outer stamping surface 321 and the inclined surface 34 is equal to 15 degrees, so that the blanking gaps can be properly reduced during blanking, and the blanking gaps are small to reduce burrs. The traditional blanking gap is usually 0.018mm, and the included angle of the fracture area of the traditional deburring structure in the double-layer blanking strip 10 is small, usually less than 30 degrees, so that a larger blanking gap is needed, the longer the elongation distance of the waste material is, the larger bending moment is easily generated in the blanking gap between the male die 3 and the female die 4 by the double-layer blanking strip 10, the weak connection of the waste material is elongated, and the height of the generated burr is usually more than or equal to 0.06 mm. In this example, by providing the arc surface 33, the inclined surface 34, the outer punching surface 321, and the inner punching surface 311, and the angle formed by the intersection of the outer punching surface 321 and the inclined surface 34 is equal to 15 degrees, a small punching gap can be applied, and a small bending moment is generated, so that the scrap connection is strong, and the scrap is not easily elongated, thereby greatly reducing the generation of burrs, and facilitating the riveting and assembling of products.
In some examples, the male mold 3 further includes a third punch 35, the third punch 35 is located on one side of the first punch 31, an anti-skip groove 36 for preventing the scrap from jumping out of the mold surface is formed on an outer side wall of the third punch 35, an anti-skip bump 42 is formed at a corresponding position on the female mold 4, the anti-skip bump 42 and the anti-skip groove 36 are matched with each other, when the scrap is punched into the female mold 4, and when the male mold 3 ascends, the scrap is clamped by the anti-skip bump 42, so that the scrap is effectively prevented from jumping out of the mold surface.
In order to prevent the anti-jump bump 42 from scratching the male mold 3, in this example, the anti-jump bump 42 is preferably excessive through an arc, for example, the anti-jump groove 36 is an N-shaped structure, the anti-jump bump 42 is set to have a corresponding shape, and the arc is set at the boundary of the anti-jump bump 42 to be excessive, so that the anti-jump bump 42 is prevented from scratching the male mold 3 during demolding.
The invention also provides a blanking process, which comprises the following steps:
firstly, placing a double-layer blanking strip 10 in a stamping space of a die;
secondly, abutting the side edge overlapping part 101 of the double-layer blanking strip 10 against the arc abutting surface 51 of the female die 4;
step three, the lower die 2 is close to the upper die 1, so that the first punching block 31 and the second punching block 32 punch the double-layer blanking strip 10;
and step four, the lower die 2 is far away from the upper die 1, and the punched double-layer blanking strip 10 is taken out.
During punching, arrange double-deck blanking strip 10 in the punching press space, then go up mould 1 and lower mould 2 and be close to each other, first punching press piece 31 and second punching press piece 32 punch double-deck blanking strip 10, because the angle that outer stamping surface 321 and inclined plane 34 alternately formed can more than or equal to 10 degrees, less than or equal to 20 degrees, can increase waste material intensity, when making terrace die 3 extrude double-deck blanking strip 10, double-deck blanking strip 10 takes place the sclerosis, the shearing crack takes place thoroughly, it is little to lengthen the distance, produce less bending moment, reduce the waste material deformation region, thereby effectively reduce the burr, simultaneously, after propping the arc that leans on double-deck blanking strip 10 side overlap portion 101 against die 4 and leaning on face 51, profile modeling lug 5 reduces tensile stress, thereby further reduce the production of burr.
The invention is suitable for the double-layer blanking strip 10, can reduce the generation of burrs from multiple aspects when the double-layer blanking strip 10 is stamped, and is convenient for riveting and assembling products.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (8)
1. The utility model provides a reduce mould of thin material lamination burr is cut to bilayer which characterized in that: comprises an upper die, a lower die, a male die and a female die;
the lower die can be close to or far away from the upper die, and a stamping space is formed between the lower die and the upper die;
the male die is arranged in the upper die and comprises a first stamping block and a second stamping block, the first stamping block is provided with an inner stamping surface, an arc surface and an inclined surface are arranged between the first stamping block and the second stamping block, one side of the arc surface is connected with the inner stamping surface, one side of the inclined surface is connected with the other side of the arc surface, the second stamping block is provided with an outer stamping surface, the outer stamping surface is connected with the other side of the inclined surface, and the angle formed by the intersection of the outer stamping surface and the inclined surface is more than or equal to 10 degrees and less than or equal to 20 degrees;
the female die is arranged on the lower die and is opposite to the male die, and a groove for inserting the first punching block and the second punching block is formed in the female die.
2. The die for reducing burrs of a double-layer slit sheet lamination of claim 1, wherein: the angle formed by the intersection of the outer stamping surface and the inclined surface is equal to 15 degrees.
3. The die for reducing burrs of a double-layer slit sheet material lamination of claim 1, wherein: the end part of the first stamping block is provided with a stamping end face, and an arc face is formed between the stamping end face and the inner stamping face.
4. The die for reducing burrs of a double-layer slit sheet material lamination of claim 1, wherein: the female die is provided with a profiling lug for reducing tensile stress, and the profiling lug corresponds to the inner punching surface.
5. The die for reducing burrs of a double slit sheet material lamination of claim 4, wherein: the profiling lug is provided with an arc-shaped abutting surface for abutting against the overlapping part of the side edges of the double-layer blanking strip.
6. The die for reducing burrs of a double-layer slit sheet material lamination of claim 1, wherein: when the lower die is close to the upper die and the die is closed, the distance between the arc surface and the inclined plane and the side wall of the groove is less than 0.009mm and more than 0.005 mm.
7. The die for reducing burrs of a double-layer slit sheet material lamination of claim 1, wherein: the male die further comprises a third stamping block, the third stamping block is located on one side of the first stamping block, and an anti-jumping groove for preventing the waste from jumping out of the die surface is formed in the outer side wall of the third stamping block.
8. A blanking process is characterized in that: the method comprises the following steps:
firstly, placing a double-layer blanking strip material in a stamping space of a die;
secondly, abutting the side edge overlapping part of the double-layer blanking strip against an arc abutting surface of the female die;
step three, enabling the lower die to be close to the upper die, and enabling the first punching block and the second punching block to punch the double-layer blanking strip;
and step four, keeping the lower die away from the upper die, and taking out the punched double-layer blanking bar stock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172193.3A CN114505400B (en) | 2022-02-24 | 2022-02-24 | Die for reducing burrs of double-layer slit thin material lamination and blanking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172193.3A CN114505400B (en) | 2022-02-24 | 2022-02-24 | Die for reducing burrs of double-layer slit thin material lamination and blanking process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114505400A true CN114505400A (en) | 2022-05-17 |
| CN114505400B CN114505400B (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210172193.3A Active CN114505400B (en) | 2022-02-24 | 2022-02-24 | Die for reducing burrs of double-layer slit thin material lamination and blanking process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114505400B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003126927A (en) * | 2001-10-16 | 2003-05-08 | Mutsuo Mizushiro | Press working metal die, punch, die and press working method |
| JP2003245734A (en) * | 2002-02-21 | 2003-09-02 | Nissan Motor Co Ltd | Trimming-press device provided with scrap cutter |
| KR20120000661U (en) * | 2010-07-23 | 2012-02-01 | 주식회사 인지디스플레이 | Punch for manufacturing display device |
| JP2012110962A (en) * | 2010-11-25 | 2012-06-14 | Masato Ochiai | Die for preventing scrap rising and scrap clogging upon punching metallic material |
| CN106424296A (en) * | 2016-11-30 | 2017-02-22 | 漳州锐腾电器有限公司 | Hardware strip double-surface no-burr blanking process and no-burr blanking mold |
| US20180333760A1 (en) * | 2015-02-25 | 2018-11-22 | Nippon Steel & Sumitomo Metal Corporation | Shearing method |
| EP3409392A1 (en) * | 2017-05-30 | 2018-12-05 | Feintool International Holding AG | Method for manufacturing stamped parts |
| CN209452598U (en) * | 2018-12-04 | 2019-10-01 | 成都腾达模具有限公司 | A kind of concave-convex mold preventing scrap-bounce |
-
2022
- 2022-02-24 CN CN202210172193.3A patent/CN114505400B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003126927A (en) * | 2001-10-16 | 2003-05-08 | Mutsuo Mizushiro | Press working metal die, punch, die and press working method |
| JP2003245734A (en) * | 2002-02-21 | 2003-09-02 | Nissan Motor Co Ltd | Trimming-press device provided with scrap cutter |
| KR20120000661U (en) * | 2010-07-23 | 2012-02-01 | 주식회사 인지디스플레이 | Punch for manufacturing display device |
| JP2012110962A (en) * | 2010-11-25 | 2012-06-14 | Masato Ochiai | Die for preventing scrap rising and scrap clogging upon punching metallic material |
| US20180333760A1 (en) * | 2015-02-25 | 2018-11-22 | Nippon Steel & Sumitomo Metal Corporation | Shearing method |
| CN106424296A (en) * | 2016-11-30 | 2017-02-22 | 漳州锐腾电器有限公司 | Hardware strip double-surface no-burr blanking process and no-burr blanking mold |
| EP3409392A1 (en) * | 2017-05-30 | 2018-12-05 | Feintool International Holding AG | Method for manufacturing stamped parts |
| CN209452598U (en) * | 2018-12-04 | 2019-10-01 | 成都腾达模具有限公司 | A kind of concave-convex mold preventing scrap-bounce |
Non-Patent Citations (1)
| Title |
|---|
| 陈毓勋, 赵振铎, 翟建军, 栾新华, 谈惠君: "板料冲裁原理与合理间隙(一)", 模具工业, no. 08, 25 August 1990 (1990-08-25) * |
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| Publication number | Publication date |
|---|---|
| CN114505400B (en) | 2024-07-12 |
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