CN111069434B - Stamping die and working method thereof - Google Patents
Stamping die and working method thereof Download PDFInfo
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- CN111069434B CN111069434B CN201911250963.6A CN201911250963A CN111069434B CN 111069434 B CN111069434 B CN 111069434B CN 201911250963 A CN201911250963 A CN 201911250963A CN 111069434 B CN111069434 B CN 111069434B
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a stamping die and a working method thereof, and the stamping die comprises a first die holder and a second die holder, wherein a stamping module and a driving module are arranged on the first die holder, a guide block is arranged on the second die holder, a bending module matched with the driving module for working is arranged on the guide block, two bending modules are arranged and respectively comprise a first bending module and a second bending module, the first bending module is arranged along the first guide direction of the guide block, the second bending module is arranged along the second guide direction of the guide block, forming modules matched with the stamping module for working are arranged on the two bending modules, a processing groove corresponding to the stamping module is arranged on the forming modules, and a guide connecting piece is arranged between the guide block and the forming modules. The stamping die can realize the accurate stretch bending forming of the section bar and improve the production efficiency of section bar products.
Description
Technical Field
The invention belongs to the technical field of stamping processing, and particularly relates to a stamping die and a working method thereof.
Background
Stamping is a press working method in which a die attached to a press is used to apply pressure to a material at room temperature to cause separation or deformation of the material, thereby obtaining a desired part. The stamping die is a special process equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping.
In recent years, the requirement of the automobile industry for light weight is continuously increased, and aluminum profiles not only meet the requirement of light weight, but also have higher rigidity, and are beginning to be widely applied to bearing structural members of automobiles. The profile parts need to be bent to a certain extent to obtain the required product shape. The conventional stretch bending method for profile parts by using a stamping die comprises three steps: firstly stretching, then bending and then performing additional stretching; when the resilience of the profile product is corrected, the profile needs to be frequently processed through CNC and various machines, so that the accuracy and the production efficiency of the profile product are reduced.
Disclosure of Invention
The invention aims to provide a stamping die and a working method thereof, and the stamping die can realize accurate stretch bending forming of a section and improve the production efficiency of a section product.
The technical scheme is as follows:
the stamping die comprises a first die holder and a second die holder, wherein a stamping module and a driving module are arranged on the first die holder, a guide block is arranged on the second die holder, a bending module matched with the driving module is arranged on the guide block, two bending modules are arranged and respectively comprise a first bending module and a second bending module, the first bending module is arranged along the first guide direction of the guide block, the second bending module is arranged along the second guide direction of the guide block, two bending modules are provided with a forming module matched with the stamping module, a processing groove corresponding to the stamping module is arranged on the forming module, a guide connecting piece is arranged between the guide block and the forming module, the driving module comprises a second fixing block and a driving block, one end of the second fixing block is fixed on the first die holder, the other end of the bending die is connected with a driving block, two inclined guide surfaces which are correspondingly arranged are arranged on the driving block, corresponding side edges of the two inclined guide surfaces are connected with each other to form a V-shaped longitudinal section, and inclined surfaces corresponding to the inclined guide surfaces are arranged on the first bending module and the second bending die.
Through the arrangement, the section to be processed is placed on the forming model, and the first die holder drives the stamping module and the driving module to synchronously move when moving towards the second die holder; the stamping module is firstly abutted against the section bar and bends the section bar to a processing groove of the forming module so as to preliminarily form the section bar; the first die holder continues to move, under the guiding action of the guide block and the guide connecting piece, the driving module drives the first bending module to move towards the first guide direction of the guide block, and meanwhile, the second bending module moves towards the second guide direction of the guide block, so that the first bending module and the second bending module are matched to bend the section bar, the resilience of the section bar is corrected, the accurate stretch bending forming effect of the section bar is achieved, the reject ratio of products is reduced, and the working efficiency and the production efficiency of section bar products are improved; in addition, the inclined guide surface of the driving block is correspondingly matched with the inclined surface of the bending module, so that the friction force generated when the driving block abuts against the bending module is reduced, the driving block is favorable for driving the bending module to move, and the bending module is further favorable for bending the section.
In one embodiment, the stamping module is arranged longitudinally, the stamping module comprises a first fixed block and a forming insert, one end of the first fixed block is fixed on the first die holder, the other end of the first fixed block is connected with the forming insert, the outer surface of the forming insert is curved and arranged in an arc shape, and the maximum transverse width of the forming insert is greater than the transverse width of the first fixed block. According to the shape requirement of a profile product, the outer surface of the forming insert is bent into an arc shape, and the forming insert is matched with the forming module to bend the profile, so that the primary forming of the profile is easy to realize.
In one embodiment, there are two forming modules, which are a first forming module and a second forming module respectively, the inner surfaces of the first forming module and the second forming module are both curved, the inner surfaces of the first forming module and the second forming module form the machining groove, and the inner surfaces of the first forming module and the second forming module correspond to the outer surface of the forming insert. The inner surfaces of the two forming modules are arranged corresponding to the outer surfaces of the forming inserts, so that the forming inserts are matched with the forming modules to bend the section, and the section is preliminarily bent and formed.
In one embodiment, a first recess is formed on the first bending module, the first forming module is located on the first recess, the first recess corresponds to an outer surface of the first forming module, a second recess is formed on the second bending module, the second forming module is located on the second recess, and the second recess corresponds to an outer surface of the second forming module. The forming module is arranged in the recess of the bending module, so that the forming module is not easy to move when the bending module works, and normal punching work is facilitated.
In one embodiment, the driving module is flush with the stamping module, the second fixed block of the driving module is provided with a protruding part, the protruding part is positioned at one end of the second fixed block connected with the driving block, and the outer surface of the protruding part is arranged corresponding to the forming insert. The driving module and the stamping module are arranged in a flush mode, the outer surface of the protruding portion of the driving module corresponds to the forming insert, when the bending module finishes bending correction of the section bar, the protruding portion limits continuous movement of the bending module, and accordingly the yield of the section bar product is improved.
In one embodiment, a reset piece is arranged between the guide block and the bending module, one end of the reset piece is connected with the guide block, and the other end of the reset piece is connected with the bending module. When the section bar is machined, the reset piece restores the bending module to the original position so as to facilitate the next work.
In one embodiment, a guide rod is arranged between the first die holder and the second die holder and is connected with the first die holder through the guide rod, a first cushion block is arranged on the first die holder, a second cushion block is arranged on the second die holder, one end of the guide rod is connected with the first cushion block, and the other end of the guide rod is connected with the second cushion block. The first die holder is connected with the second die holder through the guide rod, so that the first die holder moves towards the second die holder along the guide rod, the movement path of the first die holder is ensured, and the normal operation of stamping work is facilitated; the arrangement of the cushion block increases the interval between the first die holder and the second die holder, so that a sufficient displacement space is reserved between the first die holder and the second die holder.
In one embodiment, the first die holder and the second die holder are arranged opposite to each other, the first die holder and the second die holder are both rectangular plate-shaped, four first cushion blocks and four second cushion blocks are arranged, the four first cushion blocks are respectively located at four right angles of the first die holder, the four second cushion blocks are respectively located at four right angles of the second die holder, and the four guide rods are provided. Through the arrangement, the stability of connection between the first die holder and the second die holder is improved, and the stamping die is favorable for normal operation of stamping.
The working method of the stamping die comprises the following steps:
the stamping die is started after receiving a working instruction;
the first die holder receives the first instruction and then moves towards the second die holder, and the stamping module and the driving module synchronously move along with the first die holder;
when the forming insert of the stamping module is pressed down to be in contact with the section bar placed on the forming module, the forming insert presses the section bar to continue moving and is matched with the forming module to bend the section bar;
the first die holder continues to move towards the second die holder, the driving module is simultaneously abutted against the inclined surfaces of the first bending module and the second bending module, and the first bending module and the second bending module are pushed to respectively slide along the two sides of the guide block;
under the guiding action of the guide block and the guide connecting piece, the first bending module moves along the first guide direction of the guide block, the second bending module moves along the second guide direction of the guide block, and the first bending module and the second bending module are matched with the forming module to bend the section;
after the section is machined, the first die holder receives the second instruction and then moves towards the direction far away from the second die holder, and the stamping module and the driving module synchronously move along with the first die holder.
By adopting the working method, the stamping die holder can realize the accurate forming of the section, shorten the production period of the section forming, provide an efficient production mode for the section processing, effectively reduce the resilience of the section product and improve the qualification rate of the product.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles and effects of the invention.
Unless otherwise specified or defined, the same reference numerals in different figures refer to the same or similar features, and different reference numerals may be used for the same or similar features.
Fig. 1 is a schematic view of the overall structure of a stamping die according to an embodiment of the present invention.
Fig. 2 is a schematic longitudinal sectional view of a press die according to an embodiment of the present invention.
Fig. 3 is an exploded view of the stamping die according to the embodiment of the present invention.
Description of reference numerals:
10. a first die holder; 11. a first cushion block; 20. a second die holder; 21. a second cushion block; 30. a stamping module; 31. a first fixed block; 32. forming an insert; 40. a drive module; 41. a second fixed block; 411. a projection; 42. a drive block; 43. a wear plate; 50. a guide block; 51. a guide connection member; 60. a first bending module; 601. a first recess; 61. a second bending module; 611. a second recess; 62. an inclined surface; 70. a first forming module; 71. a second forming module; 72. processing a tank; 80. a reset member; 90. a guide rod.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, the stamping die includes a first die holder 10 and a second die holder 20 which are oppositely disposed from top to bottom, the first die holder 10 and the second die holder 20 are both rectangular plate-shaped, the first die holder 10 is provided with a stamping module 30 and a driving module 40, the second die holder 20 is provided with a guide block 50, the guide block 50 is provided with two bending modules which are respectively a first bending module 60 and a second bending module 61 and are matched with the driving module 40 to work, the first bending module 60 is disposed along a first guiding direction of the guide block 50, the second bending module 61 is disposed along a second guiding direction of the guide block 50, in this embodiment, the guide surface of the guide block 50 is an arc-shaped surface, the center line of the arc-shaped surface is used as a boundary, and the left side and the right side of the center line are respectively the first guiding direction and the second guiding direction, the abutting surfaces of the two bending modules and the guide block 50 are arranged corresponding to the guide surface of the guide block 50, forming modules matched with the stamping module 30 to work are arranged on the two bending modules, the length of each forming module is smaller than that of each bending module, a processing groove 72 corresponding to the stamping module 30 is arranged on each forming module, and a guide connecting piece 51 is arranged between the guide block 50 and each forming module.
Through the arrangement, the section to be processed is placed on the forming model, and the first die holder 10 drives the stamping module 30 and the driving module 40 to synchronously move when moving towards the second die holder 20; the punching module 30 is firstly abutted against the section bar and bends the section bar to the processing groove 72 of the forming module, so that the section bar is preliminarily formed; the first die holder 10 continues to move, under the guiding action of the guide block 50 and the guide connecting piece 51, the driving module 40 drives the first bending module 60 to move towards the first guide direction of the guide block 50, and meanwhile, the second bending module 61 moves towards the second guide direction of the guide block 50, so that the first bending module 60 and the second bending module 61 are matched to bend the section bar, the resilience of the section bar is corrected, the accurate stretch bending forming effect of the section bar is achieved, the reject ratio of the product is reduced, and the working efficiency and the production efficiency of the section bar product are improved.
The stamping module 30 is longitudinally arranged, the stamping module 30 includes a first fixed block 31 and a forming insert 32, one end of the first fixed block 31 is fixed on the first die holder 10, the other end of the first fixed block is connected with the forming insert 32, the outer surface of the forming insert 32 is curved in an arc shape, and the transverse maximum width of the forming insert 32 is greater than the transverse width of the first fixed block 31. According to the shape requirement of the section bar product, the outer surface of the forming insert 32 is bent into an arc shape, and the forming insert 32 is matched with the forming module to bend the section bar, so that the primary bending forming of the section bar is easy to realize.
The number of the forming modules is two, and the two forming modules are respectively a first forming module 70 and a second forming module 71, the inner surfaces of the first forming module 70 and the second forming module 71 are both arranged in a bent manner, the inner surfaces of the first forming module 70 and the second forming module 71 form the machining groove 72, and the inner surfaces of the first forming module 70 and the second forming module 71 correspond to the outer surface of the forming insert 32. The profile is preliminarily formed by bending by arranging the inner surfaces of the two forming modules corresponding to the outer surfaces of the forming inserts 32, and the forming inserts 32 are matched with the forming modules to press the profile into the processing groove 72.
The first bending module 60 is provided with a first recess 601, the first forming module 70 is located on the first recess 601, the first recess 601 corresponds to the outer surface of the first forming module 70, the second bending module 61 is provided with a second recess 611, the second forming module 71 is located on the second recess 611, and the second recess 611 corresponds to the outer surface of the second forming module 71. The forming module is arranged in the recess of the bending module, so that the forming module is not easy to move when the bending module works, and normal punching work is facilitated.
In this embodiment, wear plates 43 are fixed on both the inclined guide surfaces of the driving module 40, the wear plates 43 are arranged along the guide direction of the inclined guide surfaces, and the wear plates 43 are beneficial to improving the wear resistance of the driving module 40, reducing the wear between the driving module 40 and the bending module, and protecting the driving module 40 and the bending module.
In this embodiment, two driving modules 40 are provided, which are respectively located at two sides of the stamping module 30, the driving module 40 and the stamping module 30 are both arranged along the width direction of the first die holder 10 in a flush manner, the stamping module 30 corresponds to a forming module, the two driving modules 40 correspond to a bending module, the second fixing block 41 of the driving module 40 has a protruding portion 411, the protruding portion 411 is located at one end of the second fixing block 41 connected with the driving block 42, the outer surface of the protruding portion 411 corresponds to the forming insert 32, and when the bending module finishes bending and correcting the profile, the protruding portion 411 limits the continuous movement of the bending module, which is beneficial to improving the qualification rate of the profile product.
The utility model discloses a bending die, including guide block 50, drive block 42, drive block 80, reset piece 50 and bending die piece, be equipped with reset piece 80 between the die piece, in this embodiment, reset piece 80 is the bullet knock pin, reset piece 80's one end and guide block 50 are connected, and the other end is connected with bending die piece, and when the die piece motion was bent in the drive of drive block 42 drive, bending die piece extrusion reset piece 80, accomplished processing when the section bar, drive block 40 kept away from bending die piece, and the module of bending is pushed back to original position to the spring action of reset piece 80 to going on of next work.
Be equipped with guide bar 90 between first die holder 10 and the second die holder 20, and pass through guide bar 90 connects, be fixed with first cushion 11 on the first die holder 10, be fixed with second cushion 21 on the second die holder 20, guide bar 90's one end is connected with first cushion 11, and the other end is connected with second cushion 21, first cushion 11 is equipped with four, four with second cushion 21 first cushion 11 is located four right angle departments of first die holder 10 respectively, four second cushion 21 is located four right angle departments of second die holder 20 respectively, guide bar 90 is equipped with four. The first die holder 10 is connected with the second die holder 20 through the guide rod 90, so that the first die holder 10 moves towards the second die holder 20 along the guide rod 90, the movement path of the first die holder 10 is ensured, and the normal operation of stamping work is facilitated; the arrangement of the cushion block increases the interval between the first die holder 10 and the second die holder 20, so that a sufficient displacement space is formed between the first die holder 10 and the second die holder 20; the guide rods 90 are arranged at four corners of the die holder, so that the connection stability between the first die holder 10 and the second die holder 20 is improved, and the normal operation of stamping is facilitated.
The working method of the stamping die comprises the following steps:
the stamping die is started after receiving a working instruction;
the first die holder 10 receives a first instruction, and moves towards the second die holder 20 under the guiding action of the guide rod 90, and the stamping module 30 and the driving module 40 move synchronously with the first die holder 10;
when the forming insert 32 of the punching module 30 is pressed down to be in contact with the profile placed on the forming module, the forming insert 32 presses the profile to continue moving and is matched with the forming module to press the profile into the processing groove 72, so that the profile is preliminarily bent and formed;
the first die holder 10 continues to move towards the second die holder 20, the driving module 40 abuts against the inclined surfaces 62 of the first bending module 60 and the second bending module 61 at the same time, and pushes the first bending module 60 and the second bending module 61 to slide along two sides of the guide surface of the guide block 50 respectively;
under the guiding action of the guide block 50 and the guide connecting piece 51, the first bending module 60 moves along the first guide direction of the guide block 50, the second bending module 61 moves along the second guide direction of the guide block 50, the first bending module 60 and the second bending module 61 are matched with the forming module to bend the section, and the resilience of the modified section is corrected;
during the movement of the first bending module 60 and the second bending module 61, the resetting piece 80 is compressed, so that the resetting piece 80 has a tendency of pushing the first bending module 60 and the second bending module 61 back to the original positions;
after the section is processed, the first die holder 10 receives a second instruction and then moves in a direction away from the second die holder 20, the stamping module 30 and the driving module 40 synchronously move along with the first die holder 10, and the bending module and the forming module are released;
in the process of releasing the two bending modules, the restoring member 80 pushes the two bending modules back to the original position under the action of elastic force to complete one working stroke.
By adopting the working method, the stamping die holder can realize the accurate forming of the section, shorten the production period of the section forming, provide an efficient production mode for the section processing, effectively reduce the resilience of the section product and improve the qualification rate of the product.
The above embodiments are provided to illustrate, reproduce and deduce the technical solutions of the present invention, and to fully describe the technical solutions, the objects and the effects of the present invention, so as to make the public more thoroughly and comprehensively understand the disclosure of the present invention, and not to limit the protection scope of the present invention.
The above examples are not intended to be exhaustive of the invention and there may be many other embodiments not listed. Any alterations and modifications without departing from the spirit of the invention are within the scope of the invention.
Claims (9)
1. The stamping die is characterized by comprising a first die holder and a second die holder, wherein a stamping module and a driving module are arranged on the first die holder, a guide block is arranged on the second die holder, a bending module matched with the driving module is arranged on the guide block, two bending modules are arranged and respectively comprise a first bending module and a second bending module, the first bending module is arranged along the first guide direction of the guide block, the second bending module is arranged along the second guide direction of the guide block, two bending modules are provided with a forming module matched with the stamping module, the forming module is provided with a processing groove corresponding to the stamping module, a guide connecting piece is arranged between the guide block and the forming module, the driving module comprises a second fixed block and a driving block, one end of the second fixed block is fixed on the first die holder, the other end of the bending die is connected with a driving block, two inclined guide surfaces which are correspondingly arranged are arranged on the driving block, corresponding side edges of the two inclined guide surfaces are connected with each other to form a V-shaped longitudinal section, and inclined surfaces corresponding to the inclined guide surfaces are arranged on the first bending module and the second bending die.
2. The stamping die of claim 1, wherein the stamping module is longitudinally arranged, the stamping module comprises a first fixed block and a forming insert, one end of the first fixed block is fixed on the first die holder, the other end of the first fixed block is connected with the forming insert, the outer surface of the forming insert is curved and arranged in an arc shape, and the maximum transverse width of the forming insert is greater than the transverse width of the first fixed block.
3. The stamping die of claim 2, wherein there are two forming modules, namely a first forming module and a second forming module, the inner surfaces of the first forming module and the second forming module are both curved, the inner surfaces of the first forming module and the second forming module form the processing groove, and the inner surfaces of the first forming module and the second forming module correspond to the outer surface of the forming insert.
4. The stamping die of claim 3, wherein the first bending die is provided with a first recess, the first forming die is located on the first recess, the first recess corresponds to an outer surface of the first forming die, the second bending die is provided with a second recess, the second forming die is located on the second recess, and the second recess corresponds to an outer surface of the second forming die.
5. The stamping die of claim 2, wherein the drive block is flush with the stamping block, the second fixed block of the drive block having a protrusion at an end thereof connected to the drive block, the protrusion having an outer surface corresponding to the forming insert.
6. The stamping die of any one of claims 1 to 5, wherein a reset piece is arranged between the guide block and the bending module, one end of the reset piece is connected with the guide block, and the other end of the reset piece is connected with the bending module.
7. The stamping die of any one of claims 1 to 5, wherein a guide bar is provided between the first die holder and the second die holder and connected thereto via the guide bar, the first die holder being provided with a first pad, the second die holder being provided with a second pad, the guide bar having one end connected to the first pad and the other end connected to the second pad.
8. The stamping die of claim 7, wherein the first die holder is disposed opposite the second die holder, the first die holder and the second die holder each have a rectangular plate shape, four first cushion blocks are disposed on four corners of the first die holder, four second cushion blocks are disposed on four corners of the second die holder, and four guide rods are disposed.
9. The working method of the stamping die is characterized by comprising the following steps:
the stamping die is started after receiving a working instruction;
the first die holder receives the first instruction and then moves towards the second die holder, and the stamping module and the driving module synchronously move along with the first die holder;
when the forming insert of the stamping module is pressed down to be in contact with the section bar placed on the forming module, the forming insert presses the section bar to continue moving and is matched with the forming module to bend the section bar;
the first die holder continues to move towards the second die holder, the driving module is simultaneously abutted against the inclined surfaces of the first bending module and the second bending module, and the first bending module and the second bending module are pushed to respectively slide along the two sides of the guide block;
under the guiding action of the guide block and the guide connecting piece, the first bending module moves along the first guide direction of the guide block, the second bending module moves along the second guide direction of the guide block, and the first bending module and the second bending module are matched with the forming module to bend the section;
after the section is machined, the first die holder receives the second instruction and then moves towards the direction far away from the second die holder, and the stamping module and the driving module synchronously move along with the first die holder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911250963.6A CN111069434B (en) | 2019-12-09 | 2019-12-09 | Stamping die and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250963.6A CN111069434B (en) | 2019-12-09 | 2019-12-09 | Stamping die and working method thereof |
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| CN111069434A CN111069434A (en) | 2020-04-28 |
| CN111069434B true CN111069434B (en) | 2021-08-03 |
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| CN112170584B (en) * | 2020-12-02 | 2021-06-04 | 朱长亮 | Bending and wrinkling device for forming corrugations in metal plate |
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| CN202367058U (en) * | 2011-12-09 | 2012-08-08 | 抚顺煤矿电机制造有限责任公司 | Main structure shape bending die for miniature motor junction box |
| CN103801623A (en) * | 2014-03-05 | 2014-05-21 | 唐山轨道客车有限责任公司 | Bending and stamping die |
| CN205599717U (en) * | 2016-04-22 | 2016-09-28 | 浙江舜仕汽车技术有限公司 | Pipe forming die that bends |
| CN108145018A (en) * | 2018-02-07 | 2018-06-12 | 苏州日普模具有限公司 | A kind of stamping die |
| JP6487612B1 (en) * | 2018-03-19 | 2019-03-20 | 有限会社ティワイアソシエイツ | Bending machine |
| CN208466949U (en) * | 2018-06-27 | 2019-02-05 | 安徽江淮汽车集团股份有限公司 | A kind of blanking punched mold |
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| CN111069434A (en) | 2020-04-28 |
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