CN110434234B - Automobile side wall outer plate forming and processing die and method - Google Patents
Automobile side wall outer plate forming and processing die and method Download PDFInfo
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- CN110434234B CN110434234B CN201910743505.XA CN201910743505A CN110434234B CN 110434234 B CN110434234 B CN 110434234B CN 201910743505 A CN201910743505 A CN 201910743505A CN 110434234 B CN110434234 B CN 110434234B
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- 238000012545 processing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims abstract description 113
- 238000004080 punching Methods 0.000 claims abstract description 22
- 238000000465 moulding Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 238000003825 pressing Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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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
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a molding and processing die and a molding and processing method for an automobile side wall outer plate, wherein the processing die comprises an upper die base, a lower die insert and a shaping insert; the lower die insert is fixedly arranged on the lower die base, and a punching female die is arranged on the lower die insert; the upper die base is arranged above the lower die base in a manner of being capable of being opened or closed relative to the lower die base; the shaping insert is arranged on the lower end surface of the upper die base and is arranged opposite to the lower die insert; the shaping insert is used for shaping the rear protection part of the side wall outer plate between the shaping insert and the lower die insert; the punching die is arranged on the upper die base and is used for punching a rear protection part of the side wall outer plate between the shaping insert and the lower die insert; by adopting the scheme, the shaping and punching of the side wall outer plate can be realized on the same process, the processing steps of the side wall outer plate are reduced, and the processing cost of the side wall outer plate is reduced; the scheme provided by the invention has the advantages of ingenious structural design, simplicity in manufacturing and low cost, and reduces the development cost of the die.
Description
Technical Field
The invention belongs to the technical field of automobile punch forming, and particularly relates to an automobile side wall outer plate forming and processing die and method.
Background
As shown in fig. 1, when an existing automobile body side-wall outer panel 100 is drawn and formed, in order to meet the forming quality requirement of a prismatic sliding line of the appearance of the side-wall outer panel 100, the stamping direction of a drawing process needs to rotate by an angle α ° relative to the automobile body direction p, a rear protection part of the side-wall outer panel 100 cannot be drawn in place according to the shape of a product in the drawing process, the shape needs to be changed firstly, and then the side-wall outer panel is shaped into the shape of the product through a shaping; the rear protection part of the side wall outer plate is also provided with a rear security mounting hole 200, according to the traditional process and the die structure, after finishing shaping, a process of punching the rear security mounting hole is required to be arranged, and according to the traditional process, five processes are required for side wall; the existing processing mould can not carry out shaping and hole pressing at one time.
Based on the technical problems existing in the processing and forming of the automobile body side outer panel, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide a die and a method for forming and processing an automobile side wall outer plate aiming at the defects in the prior art and aims to solve the problems of complex drawing and shaping operation and high cost of the existing automobile body side wall outer plate.
The invention provides a forming and processing die for an automobile side wall outer plate, which comprises an upper die base, a lower die insert and a shaping insert, wherein the upper die base is provided with a die cavity; the lower die insert is fixedly arranged on the lower die base, and a punching female die is arranged on the lower die insert; the upper die base is arranged above the lower die base in a manner of being capable of being opened or closed relative to the lower die base; the shaping insert is arranged on the lower end surface of the upper die base and is arranged opposite to the lower die insert; the shaping insert is used for shaping the rear protection part of the side wall outer plate between the shaping insert and the lower die insert; the punching die is arranged on the upper die base and is used for punching a rear protection part of the side wall outer plate between the shaping insert and the lower die insert.
Further, the shaping insert comprises a movable shaping insert; the movable shaping insert is movably arranged on the lower end surface of the upper die holder along the vertical direction; the punch is fixed on the upper die base through the punch fixing base and can penetrate through the movable shaping insert, so that the movable shaping insert shapes the rear protection part of the side wall outer plate and then punches the hole.
Furthermore, a nitrogen cylinder is arranged at the bottom of the upper die holder, and one end of the nitrogen cylinder is fixedly arranged at the bottom of the upper die holder; the other end of the nitrogen cylinder is connected with the movable shaping insert so as to drive the movable shaping insert to move up and down; or the other end of the nitrogen cylinder is abutted against the movable shaping insert so as to push the movable shaping insert to move downwards.
Furthermore, two sides of the movable shaping insert are connected with the upper die base in a sliding mode through a movable shaping insert guide plate.
Furthermore, a limit bolt is arranged between the movable shaping insert and the upper die base; one end of a limiting bolt is fixedly arranged at the bottom of the upper die base, and the other end of the limiting bolt is arranged in a through hole of the movable reshaping insert in a telescopic mode along the vertical direction so as to limit the movable reshaping insert.
Furthermore, the shaping insert also comprises a fixed shaping insert; the fixed shaping insert is fixedly arranged on the lower end face of the upper die base along the vertical direction and is positioned on the side edge of the movable shaping insert.
Further, the material pressing core is also included; the material pressing core is slidably arranged on the upper die base through a material pressing core guide plate and is positioned on the side edge of the shaping insert; the material pressing core is used for pressing the side wall outer plate between the shaping insert and the lower die insert.
Further, the material pressing core is arranged on the upper die base in a sliding mode along the vertical direction; when the material pressing core slides to the lowest position along the vertical direction, the bottom surface of the material pressing core is lower than the bottom surface of the shaping insert along the horizontal line.
Further, the movable shaping insert is used for shaping the over-drawing position of the rear protection front part of the side wall outer plate; the fixed shaping insert is used for shaping the rear protection part of the side wall outer plate.
Correspondingly, the invention also provides a method for molding and processing the automobile side wall outer plate, which is applied to the mold for molding and processing the automobile side wall outer plate; the method comprises the following steps:
s1: placing the side wall outer plate on a lower die insert of the lower die base, and starting the die to enable the upper die base to move downwards;
s2: the upper die base moves downwards, so that the material pressing core firstly contacts the side wall outer plate and presses the side wall outer plate;
s3: then the movable reshaping insert contacts with the rear front protection part over-drawing position of the side wall outer plate firstly, and when the upper die base continues to move downwards, the movable reshaping insert starts to reshape the rear protection part over-drawing position of the side wall outer plate under the action of the nitrogen cylinder;
s4: when the die continues to move downwards, the movable shaping insert keeps static relative to the lower die insert, the punch fixed on the upper die base continues to move downwards and punches the rear protection front part of the side wall outer plate;
s5: and then, the fixed shaping insert fixed on the upper die base continuously moves downwards and shapes the rear part of the side wall outer plate.
By adopting the technical scheme, the shaping and punching of the side wall outer plate can be realized on the same process, the processing steps of the side wall outer plate are reduced, and the processing cost of the side wall outer plate is reduced; the scheme provided by the invention has the advantages of ingenious structural design, simplicity in manufacturing and low cost, and the cost of die development is greatly reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a drawing and forming schematic view of a side wall outer plate of a conventional automobile body;
FIG. 2 is a schematic view of the cut along direction A of FIG. 1;
FIG. 3 is a schematic view of the starting state of the forming and processing mold for the outer side panel of the automobile;
FIG. 4 is a schematic view of a shaping starting state of a rear fender front portion of the molding and processing die for the automobile side wall outer panel;
FIG. 5 is a schematic view of a rear fender front portion shaping end state of the automobile side wall outer panel molding processing mold of the invention;
FIG. 6 is a schematic view of a closed state of a forming and processing mold for an automobile side wall outer panel.
In the figure: 1. a lower die holder; 2. a lower die insert; 3. punching a female die; 4. an upper die holder; 5. pressing the material core; 6. a material pressing core guide plate; 7. a movable shaping insert; 8. a punch; 9. a nitrogen cylinder; 10. a limit bolt; 11. a movable shaping insert guide plate; 12. fixing the reshaping insert block; 100. a side outer plate; 200. and a rear security hole is formed.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 6, the invention provides a forming and processing die for an automobile side wall outer plate, which comprises an upper die holder 4, a lower die holder 1, a lower die insert 2 and a shaping insert; the lower die insert 2 is fixedly arranged on the lower die base 1, and the lower die insert 2 is provided with a punching female die 3; the upper die holder 4 is arranged above the lower die holder 1 in a manner of being capable of being opened or closed relative to the lower die holder 1, so that a side wall outer plate on the lower die insert 2 is processed; specifically, the shaping insert is arranged on the lower end surface of the upper die base 4 and is arranged opposite to the lower die insert 2 so as to shape the side wall outer plate, namely the shaping insert can be used for shaping the rear protection part of the side wall outer plate between the shaping insert and the lower die insert 2; further, the punching die comprises a punch 8, wherein the punch 8 is arranged on the upper die base 4 opposite to the punching female die 3 and is used for punching the rear protection part of the side wall outer plate between the shaping insert and the lower die insert 2; by adopting the scheme, the shaping and punching of the side wall outer plate can be realized in the same process, and the cost of the forming and processing of the side wall outer plate is reduced.
Preferably, in combination with the above solution, as shown in fig. 1 to 6, in the present embodiment, the shaping insert includes a movable shaping insert 7; the movable shaping insert 7 is movably arranged on the lower end surface of the upper die holder 4 along the vertical direction; the punch 8 is fixed on the upper die base 4 through a punch fixing seat and can penetrate through the movable shaping insert 7, so that the rear protection part of the side wall outer plate is shaped and then punched, namely the movable shaping insert 7 firstly shapes the rear protection part of the side wall outer plate, and then the punch 8 can penetrate through the movable shaping insert 7 to punch the rear protection part of the side wall outer plate on the lower die insert 2; by adopting the scheme, the shaping insert is made into a movable structure, shaping and punching are realized in the same process, and the forming and processing cost of the side wall outer plate is reduced.
Preferably, with the above solution, as shown in fig. 1 to 6, in this embodiment, a nitrogen cylinder 9 is disposed at the bottom of the upper die base 4, and one end of the nitrogen cylinder 9 is fixedly disposed at the bottom of the upper die base 4; the other end of the nitrogen cylinder 9 is connected with the movable shaping insert 7, so that the movable shaping insert 7 is driven to move up and down along the vertical direction, and the rear protection part of the side wall outer plate is shaped; furthermore, two sides of the movable shaping insert 7 are slidably connected with the upper die base 4 through a movable shaping insert guide plate 11, so that the movable shaping insert 7 can be slidably arranged on the upper die base 4; meanwhile, the other end of the nitrogen cylinder 9 is abutted against the movable shaping insert 7 to push the movable shaping insert to move downwards stably, so that the rear protection part of the side wall outer plate is shaped.
Preferably, in combination with the above scheme, as shown in fig. 1 to 6, in this embodiment, a limit bolt 10 is further disposed between the movable shaping insert 7 and the upper die base 4; the fixed bottom that sets up in upper die base 4 of limit bolt 10 one end, the scalable setting in the through-hole of activity plastic insert 7 of limit bolt 10 other end along vertical direction to carry on spacingly to activity plastic insert 7, be equipped with the through-hole along vertical direction on activity plastic insert 7 promptly, the fixed bottom that sets up in upper die base 4 of limit bolt 10 one end, the limit bolt 10 other end is located the through-hole through the sliding head, the sliding head can be followed the through-hole and slided from top to bottom, it is spacing to carry out sliding distance about the activity plastic insert 7.
Preferably, in combination with the above solution, as shown in fig. 1 to 6, in the present embodiment, the shaping insert further includes a fixed shaping insert 12; the fixed shaping insert 12 is fixedly arranged on the lower end face of the upper die base 4 along the vertical direction and is positioned on the side edge of the movable shaping insert 7, and the fixed shaping insert 12 is used for shaping and processing the side wall outer plate shaped by the movable shaping insert 7.
Preferably, with the above scheme, as shown in fig. 1 to 6, the mold for molding and processing the outer side panel of the automobile further comprises a pressing core 5; the material pressing core 5 is slidably arranged on the upper die holder 4 through a material pressing core guide plate 6 and is positioned on the side edge of the movable shaping insert 7; the material pressing core 5 can be used for pressing the side wall outer plate between the shaping insert and the lower die insert 2 to play a role in positioning in advance.
Preferably, in combination with the above solutions, as shown in fig. 1 to 6, in this embodiment, when the swaging core 5 is slidably disposed on the upper die base 4 in the vertical direction, and the swaging core 5 is slid to the lowest position in the vertical direction, the bottom surface of the swaging core 5 is lower than the bottom surface of the movable shaping insert 7 in the horizontal line, so that the swaging core 5 can pre-press the side wall outer panel before the movable shaping insert 7 presses the side wall outer panel for shaping.
Preferably, in combination with the above solutions, as shown in fig. 1 to 6, in the present embodiment, the movable reshaping insert 7 is used for reshaping the over-drawing position of the rear fender portion of the side wall outer plate; the fixed reshaping insert 12 is used for reshaping the rear protection part of the side wall outer plate, and the movable reshaping insert 7 is used for processing the side wall outer plate in advance of the fixed reshaping insert 12.
Correspondingly, in combination with the above scheme, as shown in fig. 1 to 6, the invention also provides a method for forming and processing the automobile side wall outer panel, which is applied to the mold for forming and processing the automobile side wall outer panel; the method comprises the following steps:
s1: placing the side wall outer plate on a lower die insert of the lower die base, and starting the die to enable the upper die base to move downwards;
s2: when the upper die holder moves downwards, the material pressing core firstly contacts the side wall outer plate and presses the side wall outer plate;
s3: when the die moves downwards to a certain position, the movable reshaping insert contacts with the over-drawing position of the rear protection part of the side wall outer plate firstly, and when the upper die base continues to move downwards, the movable reshaping insert starts to reshape the over-drawing position of the rear protection part of the side wall outer plate under the action of the nitrogen cylinder; the pressure of the nitrogen cylinder is large enough, so that the pressure required by shaping of the over-drawing position of the front part of the rear side wall outer plate can be ensured;
s4: when the die continues to move downwards, the movable shaping insert keeps static relative to the lower die insert, the punch fixed on the upper die base continues to move downwards and punches the rear protection front part of the side wall outer plate;
s5: then, a fixed shaping insert fixed on the upper die base continuously moves downwards and shapes the rear protection part of the side wall outer plate; namely, when the die reaches a closed state, the punch fixed on the upper die base completes the punching processing of the rear protection front part of the side wall outer plate, and the fixed shaping insert fixed on the upper die base completes the shaping processing of the rear protection rear part of the side wall outer plate.
By adopting the technical scheme, the movable reshaping insert is designed into the movable reshaping insert, in the moving process of the die, the movable reshaping insert shapes the front part of the rear protection part of the side wall outer plate in advance before the fixed reshaping insert, then the punch punches the front part of the rear protection part of the side wall and the fixed reshaping insert shapes the rear part of the rear protection part of the side wall outer plate, and finally the reshaping and the punching are realized in the same process, so that four processes of the side wall are realized.
By adopting the technical scheme, the shaping and punching of the side wall outer plate can be realized on the same process, the processing steps of the side wall outer plate are reduced, and the processing cost of the side wall outer plate is reduced; the scheme provided by the invention has the advantages of ingenious structural design, simplicity in manufacturing and low cost, and the cost of die development is greatly reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (2)
1. A molding and processing die for an automobile side wall outer plate is characterized by comprising an upper die base, a lower die insert and a shaping insert; the lower die insert is fixedly arranged on the lower die base, and a punching female die is arranged on the lower die insert; the upper die base is arranged above the lower die base in a manner of being capable of being opened or closed relative to the lower die base; the shaping insert is arranged on the lower end surface of the upper die base and is opposite to the lower die insert; the shaping insert is used for shaping the rear protection part of the side wall outer plate between the shaping insert and the lower die insert; the punching die is arranged on the upper die base and is used for punching a rear protection part of the side wall outer plate between the shaping insert and the lower die insert; the shaping insert comprises a movable shaping insert; the movable shaping insert is movably arranged on the lower end surface of the upper die holder along the vertical direction; the punch is fixed on the upper die base through a punch fixing seat and can penetrate through the movable reshaping insert, so that the movable reshaping insert reshapes the rear protection part of the side wall outer plate and then punches the hole; a nitrogen cylinder is arranged at the bottom of the upper die holder, and one end of the nitrogen cylinder is fixedly arranged at the bottom of the upper die holder; the other end of the nitrogen cylinder is connected with the movable shaping insert so as to drive the movable shaping insert to move up and down; or the other end of the nitrogen cylinder is abutted against the movable shaping insert so as to push the movable shaping insert to move downwards; two sides of the movable shaping insert are in sliding connection with the upper die base through a movable shaping insert guide plate; a limiting bolt is further arranged between the movable shaping insert and the upper die holder; one end of the limiting bolt is fixedly arranged at the bottom of the upper die base, and the other end of the limiting bolt is arranged in the through hole of the movable reshaping insert in a telescopic manner along the vertical direction so as to limit the movable reshaping insert; the shaping insert also comprises a fixed shaping insert; the fixed shaping insert is fixedly arranged on the lower end surface of the upper die base along the vertical direction and is positioned on the side edge of the movable shaping insert; the material pressing core is also included; the material pressing core is slidably arranged on the upper die base through a material pressing core guide plate and is positioned on the side edge of the shaping insert; the material pressing core is used for pressing the side wall outer plate between the shaping insert and the lower die insert; the material pressing core is arranged on the upper die base in a sliding manner along the vertical direction; when the material pressing core slides to the lowest position along the vertical direction, the bottom surface of the material pressing core is lower than the bottom surface of the shaping insert along the horizontal line; the movable reshaping insert is used for reshaping the over-drawing position of the rear protection front part of the side wall outer plate; the fixed reshaping insert is used for reshaping the rear protection part of the side wall outer plate.
2. A method for forming and processing an automobile side wall outer plate is characterized by being applied to the automobile side wall outer plate forming and processing die of claim 1; the method comprises the following steps:
s1: placing the side wall outer plate on a lower die insert of the lower die base, and starting the die to enable the upper die base to move downwards;
s2: the upper die base moves downwards, so that the material pressing core firstly contacts the side wall outer plate and presses the side wall outer plate;
s3: then the movable reshaping insert contacts with the rear front protection part over-drawing position of the side wall outer plate firstly, and when the upper die base continues to move downwards, the movable reshaping insert starts to reshape the rear protection part over-drawing position of the side wall outer plate under the action of the nitrogen cylinder;
s4: when the die continues to move downwards, the movable shaping insert keeps static relative to the lower die insert, the punch fixed on the upper die base continues to move downwards and punches the rear protection front part of the side wall outer plate;
s5: and then, the fixed shaping insert fixed on the upper die base continuously moves downwards and shapes the rear part of the side wall outer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743505.XA CN110434234B (en) | 2019-08-13 | 2019-08-13 | Automobile side wall outer plate forming and processing die and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743505.XA CN110434234B (en) | 2019-08-13 | 2019-08-13 | Automobile side wall outer plate forming and processing die and method |
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| CN110434234A CN110434234A (en) | 2019-11-12 |
| CN110434234B true CN110434234B (en) | 2021-04-27 |
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| CN201910743505.XA Active CN110434234B (en) | 2019-08-13 | 2019-08-13 | Automobile side wall outer plate forming and processing die and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130898B (en) * | 2020-09-04 | 2023-07-21 | 长城汽车股份有限公司 | Stamping die |
| CN115351169A (en) * | 2022-08-22 | 2022-11-18 | 中国第一汽车股份有限公司 | Automobile door outer panel hand buckle drawing forming die, method and equipment |
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| Publication number | Publication date |
|---|---|
| CN110434234A (en) | 2019-11-12 |
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