CN112475041B - Firmly-positioned die for stamping and forming automobile metal plate and stamping process thereof - Google Patents
Firmly-positioned die for stamping and forming automobile metal plate and stamping process thereof Download PDFInfo
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- CN112475041B CN112475041B CN202011264323.3A CN202011264323A CN112475041B CN 112475041 B CN112475041 B CN 112475041B CN 202011264323 A CN202011264323 A CN 202011264323A CN 112475041 B CN112475041 B CN 112475041B
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- positioning
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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
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to the technical field, in particular to a firmly-positioned die for stamping and forming an automobile sheet metal and a stamping process thereof. The firmly-positioned die for stamping and forming the automobile sheet metal comprises a support frame, a die, a positioning device and a stamping device, wherein the die, the positioning device and the stamping device are installed through the support frame, the die is driven by the stamping device to stamp and form the sheet metal part, and the sheet metal part is positioned through the positioning device, so that the sheet metal part is prevented from deviating in the stamping process, the stamping effect is ensured, and the defective rate is reduced.
Description
Technical Field
The invention relates to the technical field of stamping dies, in particular to a die for stamping and forming automobile metal plates and a stamping process thereof.
Background
Important parts of the stamping die comprise a male die, a female die and a positioning plate, when the thin metal plate is stamped, the thin metal plate is firstly placed on the positioning plate, the metal plate is stamped by the male die, and the thin metal plate is shaped by the female die.
As disclosed in patent application No. CN201710665130.0, a sheet metal stamping forming die includes: the die comprises a male die, a female die, a stretching sliding block, edge pressing sliding blocks, positioning plates and a hydraulic discharging device, wherein the male die and the female die are arranged in a vertically corresponding mode, the stretching sliding blocks are arranged above the male die and fixedly connected with the male die, the edge pressing sliding blocks are symmetrically arranged on the left side and the right side of the male die, the positioning plates are arranged on the plane of the upper end of the female die, and the hydraulic discharging device is arranged below the female die and extends into a female die forming cavity. Through the mode, the stamping die is simple in structure, the edge pressing slide block is adopted to ensure that the metal plate is stamped and formed under a pressing state, the impact force is reduced, the metal plate is prevented from being broken in the stamping process, and the qualified rate of finished products can be effectively improved.
The stamping forming mould of above-mentioned patent adopts the blank pressing slider to guarantee that the panel beating is stamping forming under the state that compresses tightly, effectively improves the finished product qualification rate. However, the positioning plate of the stamping forming die only plays a role in placing sheet metal parts, the sheet metal parts cannot be well positioned, if the sheet metal parts deviate in the stamping process, the stamping effect can be influenced, and defective products are easy to occur.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a die for stamping and forming automobile sheet metal and a stamping process thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a car panel beating mould for stamping forming that location is firm, includes the support frame and installs mould, positioner, stamping device on the support frame, the mould includes last mould and the lower mould of looks adaptation, the lower mould sets up on the support frame, it is located the lower mould directly over to go up the mould, stamping device is connected with the mounting panel and can drives the mounting panel activity from top to bottom, it installs on the mounting panel to go up the mould, be provided with the standing groove that is used for placing the sheet metal component on the lower mould, positioner includes first locating component, second locating component, first locating component includes two horizontal sliders that set up respectively on lower mould both sides, horizontal slider is through a horizontal spring coupling on the support frame, horizontal spring applys towards the inboard elasticity of standing groove to the slider and enables the outstanding standing groove of horizontal slider part in order to block the sheet metal component, second locating component includes two vertical slide bars that set up respectively on lower mould both sides, vertical slide bar passes through a vertical spring coupling on the mounting panel, the setting that vertical slide bar can move about the activity is on the mounting panel, vertical spring applys elasticity so that vertical slide bar to make vertical slide bar on supporting on the piece to vertical slide bar.
Furthermore, the stamping die further comprises a discharging device, wherein the discharging device is positioned at the bottom of the lower die and used for ejecting the stamped sheet metal part.
Furthermore, the first positioning assembly further comprises two guide rods, guide holes penetrating through the left end and the right end of the transverse sliding block are formed in the transverse sliding block, one end of each guide rod is connected to the support frame, and the other end of each guide rod penetrates through the corresponding guide hole.
Furthermore, the transverse spring is sleeved on the guide rod.
Furthermore, the second positioning assembly further comprises two positioning plates, the positioning plates are fixed on the supporting frame, sliding holes for the vertical sliding rods to penetrate through are formed in the positioning plates, and the vertical sliding rods can move up and down along the sliding holes.
Furthermore, the bottom of the vertical sliding rod is provided with a flexible cushion block.
Furthermore, the bottom of the vertical sliding rod is of an inclined plane structure, the end part of the transverse sliding block is of an inclined plane structure matched with the bottom of the vertical sliding rod, and the vertical sliding rod can be in contact with the transverse sliding block when moving downwards and can extrude the transverse sliding block to move outwards through the inclined plane structure matched with the transverse sliding block.
Furthermore, the positioning device further comprises a third positioning assembly, the third positioning assembly comprises a plurality of positioning rods and a plurality of positioning cylinders, the positioning rods are arranged on the mounting plate, the positioning cylinders are arranged on the support frame and located under the positioning rods, and positioning holes matched with the positioning rods are formed in the positioning cylinders.
Furthermore, the bottom of the positioning rod is of an arc-surface-shaped structure.
The invention also provides a stamping process of the automobile sheet metal stamping forming die with stable positioning, which comprises the following steps:
placing the sheet metal part in a placing groove above the lower die;
respectively clamping two transverse sliding blocks of a first positioning assembly above two sides of a sheet metal part to position the sheet metal part;
starting the stamping device, and driving the mounting plate and the upper die to move downwards by the stamping device;
when the mounting plate moves downwards, the two vertical sliding rods of the second positioning assembly respectively abut against the two sides of the sheet metal part for secondary positioning;
and the upper die is driven by the stamping device to stamp and form the sheet metal part.
The invention has the beneficial effects that: the invention is described above, and compared with the prior art, the firmly-positioned die for stamping and forming the sheet metal part of the automobile comprises a support frame, a die, a positioning device and a stamping device, wherein the die, the positioning device and the stamping device are installed through the support frame, the die is driven by the stamping device to stamp and form the sheet metal part, the sheet metal part is positioned through the positioning device, the sheet metal part is prevented from deviating in the stamping process, the stamping effect is ensured, and the defective rate is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a firmly-positioned die for stamping and forming automobile sheet metal in the preferred embodiment of the invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
reference numerals: 1. a support frame; 2. a mold; 3. a positioning device; 4. a stamping device; 5. a discharge device; 21. an upper die; 22. a lower die; 23. a placement groove; 31. a first positioning assembly; 32. a second positioning assembly; 33. a third guide assembly; 41. mounting a plate; 311. a transverse slide block; 312. a lateral spring; 313. a guide bar; 321. a vertical slide bar; 322. a vertical spring; 323. positioning a plate; 324. a flexible cushion block; 331. positioning a rod; 332. a positioning cylinder.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-2, in a preferred embodiment of the present invention, a mold for stamping and forming a sheet metal plate of an automobile, which is stably positioned, includes a supporting frame 1, and a mold 2, a positioning device 3, and a stamping device 4 which are mounted on the supporting frame 1, the mold 2 includes an upper mold 21 and a lower mold 22 which are adapted to each other, the lower mold 22 is disposed on the supporting frame 1, the upper mold 21 is located right above the lower mold 22, the stamping device 4 is connected to a mounting plate 41 and can drive the mounting plate 41 to move up and down, the upper mold 21 is mounted on the mounting plate 41, a placing groove 23 for placing the sheet metal part is disposed on the lower mold 22, the positioning device 3 includes a first positioning assembly 31 and a second positioning assembly 32, the first positioning assembly 31 includes two transverse sliders 311 which are disposed on two sides of the lower mold 22, the transverse sliders 311 are connected to the supporting frame 1 through a transverse spring 312, the transverse spring 312 applies an elastic force toward the inner side of the placing groove 23 to the transverse slider 311, so that a portion of the transverse slider 311 protrudes out of the placing groove 23 to clamp the sheet metal plate, the sheet metal part of the placing groove 23 to clamp the sheet metal part, the second positioning assembly 32 includes two vertical sliders 321 which are disposed on the vertical springs 321 which are disposed on the vertical sliding rods 322, and are disposed on the vertical spring 321 which are disposed on the mounting plate 41, and can apply an elastic force applied to the vertical spring 321 which is disposed on the vertical mounting plate 321.
The stably-positioned die for stamping and forming the automobile sheet metal comprises a support frame 1, a die 2, a positioning device 3 and a stamping device 4, wherein the die 2, the positioning device 3 and the stamping device 4 are installed on the support frame 1, the die 2 is driven by the stamping device 4 to stamp and form the sheet metal part, the sheet metal part is positioned by the positioning device 3, the sheet metal part is prevented from deviating in the stamping process, the stamping effect is ensured, and the defective rate is reduced, the positioning device 3 comprises a first positioning assembly 31 and a second positioning assembly 32, the first positioning assembly 31 exerts elastic force on a transverse sliding block 311 through a transverse spring 312, and the transverse sliding block 311 partially protrudes out of a placing groove 23 to clamp the sheet metal part, so that the movement of the sheet metal part in the vertical direction is limited, the sheet metal part can be installed in place in the placing groove 23, in the stamping process, the second positioning assembly 32 exerts the elastic force on a vertical sliding rod 321 through a vertical spring 322 to enable the vertical sliding rod 321 to abut against the sheet metal part, the vertical sliding rod 321 is prevented from generating vertical movement due to the overlarge impact force, a certain buffering effect is achieved, the fracture is avoided, and the qualified rate of the sheet metal part is effectively improved.
The invention also provides a stamping process of the firmly-positioned die for stamping and forming the automobile metal plate, which comprises the following steps:
placing the sheet metal part in a placing groove 23 above the lower die 22;
the two transverse sliding blocks 311 of the first positioning component 31 are respectively clamped above two sides of the sheet metal part to position the sheet metal part;
the stamping device 4 is started, and the mounting plate 41 and the upper die 21 are driven by the stamping device 4 to move downwards;
when the mounting plate 41 moves downwards, the two vertical sliding rods 321 of the second positioning assembly 32 respectively abut against two sides of the sheet metal part for secondary positioning;
the upper die 21 is driven by the press device 4 to press-form a sheet metal member.
The stamping process is based on the die for stamping and forming the automobile sheet metal, stamping and forming of the sheet metal part can be well completed, the sheet metal part is doubly positioned by the first positioning component 31 and the second positioning component 32 during stamping, the sheet metal part is prevented from being deviated during stamping, and the qualified rate of finished products is effectively improved.
As a preferred embodiment of the present invention, it may also have the following additional technical features:
in this embodiment, the stamping die further comprises a discharging device 5, wherein the discharging device 5 is located at the bottom of the lower die 22 and is used for ejecting the stamped sheet metal part. The discharging device 5 is disposed at the bottom of the lower die 22, and the punched sheet metal part is ejected by the discharging device 5, and the discharging device 5 may be a cylinder, but is not limited thereto.
In this embodiment, the first positioning assembly 31 further includes two guide rods 313, guide holes penetrating through the left and right ends of the transverse slider 311 are formed in the transverse slider 311, one end of each guide rod 313 is connected to the support frame 1, the other end of each guide rod 313 is arranged in each guide hole in a penetrating manner, and the transverse spring 312 is sleeved on the guide rod 313. The first positioning assembly 31 guides the transverse sliding block 311 through the guide rod 313, and the transverse sliding block 311 is provided with a guide hole matched with the guide rod 313 to ensure that the transverse sliding block 311 can move transversely along the guide rod 313.
In this embodiment, the second positioning assembly 32 further includes two positioning plates 323, the positioning plates 323 are fixed on the supporting frame 1, a sliding hole for the vertical sliding rod 321 to pass through is formed in the positioning plates 323, and the vertical sliding rod 321 can move up and down along the sliding hole. The second positioning assembly 32 includes two positioning plates 323, and a slide hole is formed in the positioning plate 323, through which the vertical slide bar 321 passes, so as to position the vertical slide bar 321 through the positioning plate 323, and ensure that the vertical slide bar 321 can only move in the vertical direction, so as to ensure that the upper die 21 moves in the vertical direction, thereby improving the punching effect.
In this embodiment, a flexible cushion block 324 is disposed at the bottom of the vertical sliding rod 321. Because the bottom of the vertical sliding rod 321 is to abut against the sheet metal part, the flexible cushion block 324 is arranged at the bottom of the vertical sliding rod 321 and is arranged between the vertical sliding rod 321 and the sheet metal part in a cushioning manner, so that the surface of the sheet metal part is prevented from being scraped by the vertical sliding rod 321.
In this embodiment, the bottom of the vertical sliding rod 321 is an inclined surface structure, the end of the horizontal sliding block 311 is an inclined surface structure matched with the bottom of the vertical sliding rod 321, and when the vertical sliding rod 321 moves downwards, the vertical sliding rod 321 can contact with the horizontal sliding block 311 and extrude the horizontal sliding block 311 to move outwards through the matched inclined surface structure. Set up to corresponding inclined plane structure between vertical slide bar 321 and the horizontal slider 311, earlier with horizontal slider 311 contact when vertical slide bar 321 moves down, extrude horizontal slider 311 outside activity, contact with the sheet metal component again to play the effect of buffering, prevent that vertical slide bar 321 from producing too big impact force to the sheet metal component.
In this embodiment, the positioning device 3 further includes a third positioning assembly 33, the third positioning assembly 33 includes a plurality of positioning rods 331 and a plurality of positioning cylinders 332, the positioning rods 331 are disposed on the mounting plate 41, the positioning cylinders 332 are disposed on the support frame 1 and located right below the positioning rods 331, and positioning holes matched with the positioning rods 331 are disposed in the positioning cylinders 332. The positioning device 3 restricts the movement of the mounting plate 41 by the third positioning unit 33, and by providing the positioning rod 331 on the mounting plate 41 and the positioning cylinder 332 fitted to the positioning rod 331 on the support frame 1, when the mounting plate 41 moves downward, the positioning rod 331 is inserted into the positioning cylinder 332, and the mounting plate 41 and the upper die 21 are ensured to move in the vertical direction.
In this embodiment, the bottom of the positioning rod 331 is an arc-shaped structure. The bottom of the positioning rod 331 is configured as an arc-shaped structure, so that the positioning rod 331 can be inserted into the positioning cylinder 332 conveniently.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. The utility model provides a car panel beating mould for stamping forming that location is firm which characterized in that: including support frame (1) and install mould (2), positioner (3), stamping device (4) on support frame (1), mould (2) are including last mould (21) and lower mould (22) of looks adaptation, lower mould (22) set up on support frame (1), it is located lower mould (22) directly over to go up mould (21), stamping device (4) are connected with mounting panel (41) and can drive mounting panel (41) and move from top to bottom, go up mould (21) and install on mounting panel (41), be provided with standing groove (23) that are used for placing the sheet metal component on lower mould (22), positioner (3) are including first locating component (31), second locating component (32), first locating component (31) include two horizontal slider (311) that set up respectively in lower mould (22) both sides, horizontal slider (311) are connected on support frame (1) through a horizontal spring (312), horizontal slider (311) is exerted to horizontal slider (311) and is enabled horizontal slider (311) inboard elasticity to make horizontal slider (311) protruding the standing groove (23) with two vertical locating component (321) that the sheet metal component (22) set up respectively, the vertical sliding rod (321) is connected to the mounting plate (41) through a vertical spring (322), the vertical sliding rod (321) is movably arranged on the mounting plate (41) up and down, and the vertical spring (322) applies elasticity to the vertical sliding rod (321) to enable the vertical sliding rod (321) to abut against the sheet metal part;
the bottom of the vertical sliding rod (321) is of an inclined plane structure, the end part of the transverse sliding block (311) is of an inclined plane structure matched with the bottom of the vertical sliding rod (321), and the vertical sliding rod (321) can be in contact with the transverse sliding block (311) when moving downwards and can extrude the transverse sliding block (311) to move outwards through the matched inclined plane structure.
2. The firm mould for stamping forming of car panel beating of location of claim 1, characterized in that: still include discharge apparatus (5), discharge apparatus (5) are located the bottom of lower mould (22) for ejecting stamping forming's sheet metal component.
3. The firm mould for stamping forming of car panel beating of location of claim 1, characterized in that: the first positioning assembly (31) further comprises two guide rods (313), guide holes penetrating through the left end and the right end of the transverse sliding block (311) are formed in the transverse sliding block (311), one end of each guide rod (313) is connected to the support frame (1), and the other end of each guide rod penetrates through the corresponding guide hole.
4. The firm mould for stamping forming of car panel beating of location of claim 3, characterized in that: the transverse spring (312) is sleeved on the guide rod (313).
5. The firm mould for stamping forming of car panel beating of location of claim 1, characterized in that: the second positioning assembly (32) further comprises two positioning plates (323), the positioning plates (323) are fixed on the support frame (1), sliding holes for the vertical sliding rods (321) to penetrate through are formed in the positioning plates (323), and the vertical sliding rods (321) can move up and down along the sliding holes.
6. The firm mould for stamping forming of car panel beating of location of claim 1, characterized in that: and a flexible cushion block (324) is arranged at the bottom of the vertical sliding rod (321).
7. The firm mould for stamping forming of car panel beating of location of claim 1, characterized in that: the positioning device (3) further comprises a third positioning assembly (33), the third positioning assembly (33) comprises a plurality of positioning rods (331) and a plurality of positioning cylinders (332), the positioning rods (331) are arranged on the mounting plate (41), the positioning cylinders (332) are arranged on the support frame (1) and located under the positioning rods (331), and positioning holes matched with the positioning rods (331) are formed in the positioning cylinders (332).
8. The firm mould for stamping forming of car panel beating of location of claim 7, characterized in that: the bottom of the positioning rod (331) is of an arc-surface-shaped structure.
9. The stamping process of the stably-positioned die for stamping and forming the automobile sheet metal according to any one of claims 1-8, wherein the stamping process comprises the following steps:
placing the sheet metal part in a placing groove (23) above a lower die (22);
the two transverse sliding blocks (311) of the first positioning component (31) are respectively clamped above two sides of the sheet metal part to position the sheet metal part;
starting the stamping device (4), wherein the stamping device (4) drives the mounting plate (41) and the upper die (21) to move downwards;
when the mounting plate (41) moves downwards, two vertical sliding rods (321) of the second positioning assembly (32) respectively abut against two sides of the sheet metal part for secondary positioning;
the upper die (21) is driven by the stamping device (4) to stamp the sheet metal part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264323.3A CN112475041B (en) | 2020-11-12 | 2020-11-12 | Firmly-positioned die for stamping and forming automobile metal plate and stamping process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264323.3A CN112475041B (en) | 2020-11-12 | 2020-11-12 | Firmly-positioned die for stamping and forming automobile metal plate and stamping process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112475041A CN112475041A (en) | 2021-03-12 |
| CN112475041B true CN112475041B (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011264323.3A Active CN112475041B (en) | 2020-11-12 | 2020-11-12 | Firmly-positioned die for stamping and forming automobile metal plate and stamping process thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113231556A (en) * | 2021-05-10 | 2021-08-10 | 东风柳州汽车有限公司 | Positioning device and stamping die |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1131575A1 (en) * | 1983-12-16 | 1984-12-30 | Предприятие П/Я А-3757 | Sheet metal stamping die |
| CN105903808A (en) * | 2016-06-16 | 2016-08-31 | 嘉兴亨泰金属制品有限公司 | Clamping and trepanning die for hardware |
| WO2016197336A1 (en) * | 2015-06-09 | 2016-12-15 | 冯旋宇 | Disposable barb bending forming mould |
| CN108607926A (en) * | 2018-05-30 | 2018-10-02 | 马新佳 | A kind of handware processing clamping device |
| CN110976599A (en) * | 2019-12-26 | 2020-04-10 | 吉林工程技术师范学院 | Automatic stamping forming equipment for end part of cylindrical pipe fitting |
| CN211101132U (en) * | 2019-11-26 | 2020-07-28 | 丹东瑞应汽车冲压件有限公司 | Die for air inlet cone large opening pressing bag |
-
2020
- 2020-11-12 CN CN202011264323.3A patent/CN112475041B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1131575A1 (en) * | 1983-12-16 | 1984-12-30 | Предприятие П/Я А-3757 | Sheet metal stamping die |
| WO2016197336A1 (en) * | 2015-06-09 | 2016-12-15 | 冯旋宇 | Disposable barb bending forming mould |
| CN105903808A (en) * | 2016-06-16 | 2016-08-31 | 嘉兴亨泰金属制品有限公司 | Clamping and trepanning die for hardware |
| CN108607926A (en) * | 2018-05-30 | 2018-10-02 | 马新佳 | A kind of handware processing clamping device |
| CN211101132U (en) * | 2019-11-26 | 2020-07-28 | 丹东瑞应汽车冲压件有限公司 | Die for air inlet cone large opening pressing bag |
| CN110976599A (en) * | 2019-12-26 | 2020-04-10 | 吉林工程技术师范学院 | Automatic stamping forming equipment for end part of cylindrical pipe fitting |
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| CN112475041A (en) | 2021-03-12 |
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