CN112427552B - Drawing forming die and drawing forming process - Google Patents
Drawing forming die and drawing forming processInfo
- Publication number
- CN112427552B CN112427552B CN202011296813.1A CN202011296813A CN112427552B CN 112427552 B CN112427552 B CN 112427552B CN 202011296813 A CN202011296813 A CN 202011296813A CN 112427552 B CN112427552 B CN 112427552B
- Authority
- CN
- China
- Prior art keywords
- die
- punch
- groove
- forming
- deep drawing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Classifications
-
- 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
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
本发明公开一种拉深成形模具和拉深成形工艺，用于拉深成形具有隆起的大端和小端的长条形零件，拉深成形模具包括凸模和凹模，凸模、凹模包括与待加工零件匹配的凸模成型部、凹模成型部，凸模成型部、凹模成型部对应于小端的部分沿长度方向继续延伸形成凸模工艺造型部、凹模工艺造型部，且凹模工艺造型部的中部内陷形成至少一个外端开口的凹模中部凹槽，凸模工艺造型部设有与凹模中部凹槽对应的外端开口的凸模中部凹槽或凸模中部通槽。具有开放型工艺造型部结构的凹模、凸模可以增加在宽度方向的截面长度，控制板料在宽度方向的流入量、方向，并吸收多余的板料，从而减少甚至消除待加工零件在小端出现局部起皱的现象，避免模具损伤，提高生产效率。
This invention discloses a deep drawing die and a deep drawing process for deep drawing elongated parts with raised large and small ends. The deep drawing die includes a punch and a die. The punch and die include punch forming parts and die forming parts that match the part to be processed. The portions of the punch forming parts and die forming parts corresponding to the small end continue to extend along the length direction to form punch process shaping parts and die process shaping parts. The middle part of the die process shaping part is recessed to form at least one die middle groove with an outer end opening. The punch process shaping part has a punch middle groove or punch middle through groove with an outer end opening corresponding to the die middle groove. The die and punch with open process shaping part structure can increase the cross-sectional length in the width direction, control the flow amount and direction of sheet metal in the width direction, and absorb excess sheet metal, thereby reducing or even eliminating the phenomenon of local wrinkling at the small end of the part to be processed, avoiding die damage, and improving production efficiency.
Description
Technical Field
The invention relates to the technical field of deep drawing forming, in particular to a deep drawing forming die and a deep drawing forming process.
Background
As shown in fig. 1, fig. 1 is a schematic diagram of a die for deep drawing a central channel of an automobile.
The female die 01 comprises a forming part 011 and a material pressing part 012, wherein the forming part 011 is raised relative to the material pressing part 012 and is used for forming a raised part of a central channel of an automobile to be processed. One end of the bulge part of the automobile central channel is a small end, the other end of the bulge part is a large end, and the forming part 011 is correspondingly provided with a small end 011a and a large end 011b. At a position corresponding to the small end 011a in fig. 1, the molding portion 011 extends and smoothly transits to form a curved surface and then extends downward to connect to the press portion 012 at the end portion, so as to form a molding portion 013 having a semi-closed cavity, so as to complete the molding of the small end stamping process profile. The press 012 of the female die 01 is provided with partial pits 012a and draw beads to increase the flow resistance of the sheet material. The male die structure can be understood with reference.
However, the above mold still has a local wrinkling phenomenon at the forming portion 011 during actual production.
Disclosure of Invention
The invention provides a drawing forming die which is used for drawing and forming a strip-shaped part with a large end and a small end which are raised, wherein the drawing forming die comprises a male die and a female die, the male die and the female die comprise a male die forming part and a female die forming part which are matched with the part to be processed, the male die forming part and the female die forming part are continuously extended along the length direction to form a male die process forming part and a female die process forming part, the middle part of the female die process forming part is inwards sunken to form at least one female die middle groove with an outer end opening, and the male die process forming part is provided with a male die middle groove or a male die middle through groove with an outer end opening, which corresponds to the female die middle groove.
Optionally, the male mold process molding part forms a male mold middle groove or a male mold middle through groove, and the male mold process molding part forms male mold side protrusions extending from two sides of the male mold molding part at the same time on two sides of the male mold middle groove or the male mold middle through groove, and the notch direction of each male mold side protrusion is the same as the notch direction of the male mold molding part;
The female die process modeling part forms a female die middle groove, the female die process modeling part simultaneously forms female die side bulges extending from two sides of the female die forming part at two sides of the female die middle groove, and the directions of the notch bulges at the female die side parts are the same as the directions of the notch bulges at the female die forming part and are opposite to the directions of the notch bulges at the female die middle groove.
Optionally, the depth of the through groove in the middle of the male die or the groove in the middle of the male die and the height of the protrusion at the side part of the male die are the same as the height of the small end of the male die forming part, and the depth of the groove in the middle of the female die and the height of the protrusion at the side part of the female die are the same as the height of the small end of the female die forming part.
Optionally, the deep drawing forming die comprises an upper die assembly and a lower die assembly, the upper die assembly comprises the female die, the female die comprises a female die pressing part which is of an integral structure with the female die forming part, the lower die assembly comprises the male die and a lower die pressing part, and the ends of the female die pressing part and the lower die pressing part are flush with the male die forming part and the ends of the female die forming part.
Optionally, the die pressing part and the lower die pressing part are respectively provided with a lower die stretching rib and a die stretching rib which extend along the length direction at one end corresponding to the small end.
Optionally, the lower die pressing part and the female die pressing part are respectively provided with a lower die strip groove and a female die strip groove, the lower die strip groove and the female die strip groove run through the corresponding lower die pressing part and the female die pressing part along the length direction, the positions of the two sides corresponding to the male die forming part are respectively provided with the lower die strip groove, and the two sides corresponding to the female die forming part are respectively provided with the female die strip groove.
Optionally, the lower die strip groove corresponds to a boundary between the lower die pressing part and the male die forming part, and the female die strip groove corresponds to a boundary between the female die pressing part and the female die forming part.
Optionally, the lower die pressing part, the male die process modeling part and the male die forming part are arranged in a body.
Optionally, the male die process modeling part is provided with a male die middle through groove corresponding to the female die middle groove, and the lower die material pressing part comprises a lower die material pressing plate corresponding to the top of the male die middle through groove.
Optionally, the elongated member is an automotive central tunnel.
The invention also provides a drawing forming process, which is based on the drawing forming die of the eighth item, and comprises the following steps:
placing a plate between the female die and the lower die pressing part;
the female die and the lower die pressing part move relatively to press the plate;
the female die and the male die move relatively, and the primary product of the strip-shaped part is formed by deep drawing;
cutting off an excess portion of the primary product;
Forming the elongated member.
In the deep drawing forming die and the deep drawing forming process in the scheme, as the concave part process modeling part and the convex part process modeling part extend forwards from the corresponding forming parts and the middle part is sunken, the flow speed of the middle part plate can be controlled, and particularly importantly, redundant plate materials when small ends are formed can be absorbed, the whole concave part process modeling part and the convex part process modeling part are of open designs with open outer ends, and the flow directions of the plate materials are mainly along the width direction, so that the plate materials are not easy to be stacked together to form wrinkles. Therefore, the female die and the male die with the open type process modeling part structure can increase the section length of the process modeling part in the width direction, control the inflow amount and the inflow direction of the plate in the width direction, absorb redundant plate materials, reduce or even eliminate the phenomenon that the part to be processed is locally wrinkled at the small end in the deep drawing process, avoid the damage of the die, improve the production efficiency and reduce the production cost, so that the normal mass production of the part to be processed is realized.
In addition, as the process modeling part formed by extension is used as a pressing material at the same time, the pressing material effect is better, so that the required pressing material surface of the small end can be reduced in the length direction of the part, the size of the plate required by punching is obviously reduced, the material utilization rate is improved, the production cost can be reduced, and the economic benefit and the market competitiveness are improved.
Drawings
FIG. 1 is a schematic diagram of a die for deep drawing a central channel of an automobile;
FIG. 2 is a schematic view of a central passage of an automobile drawn by a drawing die according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a female die in an embodiment of the invention;
FIG. 4 is a schematic outline view of the end of the die of FIG. 3;
FIG. 5 is a schematic view of the die tip of FIG. 3;
FIG. 6 is a schematic view of a male mold forming section and a male mold process forming section according to an embodiment of the present invention;
FIG. 7 is a schematic view of the end of the male mold section, male tooling section of FIG. 6;
FIG. 8 is a schematic view of a lower molding part according to an embodiment of the present invention.
The reference numerals in fig. 1-8 are illustrated as follows:
01-female die, 011-forming part, 011 a-small end, 011 b-large end, 012-pressing part, 012 a-pit and 013-forming part;
1. A male die;
11-male die forming part, 111-small end, 112-large end;
12-lower die pressing part, 121-lower die stretching ribs, 122-lower die strip grooves and 123-lower die pressing plates;
13-punch craft modeling part, 131-punch middle through groove, 131 a-peripheral wall, 132-punch side bulge;
2-female die;
21-a female die forming part, 212-a large end and 211-a small end;
the die comprises a die pressing part 22, a die drawing bead 221, a die strip groove 222;
23-a female die process modeling part, 231-a female die middle groove, 231 a-a bottom wall, 231 b-a peripheral wall and 232-a female die side bulge;
3-automobile center tunnel, 31-tunnel edge, 32-bump, 322-large end, 321-small end.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The drawing forming die of the solution is used for drawing and forming a long strip-shaped part with a large end and a small end, and in this embodiment, the long strip-shaped part is an automobile central passage 3, please refer to fig. 2, fig. 2 is a schematic structural diagram of the automobile central passage 3 drawn and formed by the drawing forming die in the embodiment of the invention.
The middle part of the automobile central passage 3 bulges to form a bulge part 32, the bulge part 32 forms a main body part of the automobile central passage 3, two sides of the bulge part 32 are passage edges 31, the left end of the bulge part 32 of the automobile central passage 3 has a certain gradient and is contracted towards the middle part in fig. 2, so that a small end is formed, and the other end is a large end. The research shows that the inflow amount of the plate material at the small end is less, but the initial plate material in the small end and large end die cavities of the deep drawing forming die is as much as the initial plate material, so that the initial plate material at the small end is more in practice, the excessive plate material cannot be consumed at the position of the modeling part 013 in the background technology, and the plate material is seriously accumulated locally, so that the part to be processed is seriously wrinkled to damage the die, and the mass production is difficult to realize.
With continued reference to fig. 3-5, fig. 3 is a schematic structural view of the female die 2 according to an embodiment of the present invention, fig. 4 is a schematic outline view of an end portion of the female die 2 in fig. 3, fig. 5 is a schematic outline view of an end portion of the female die 2 in fig. 3, fig. 6 is a schematic structural view of the male die forming portion 11 and the male die process forming portion 13 according to an embodiment of the present invention, and fig. 7 is a schematic outline view of an end portion of the male die forming portion 11 and the male die process forming portion 13 in fig. 6.
The drawing forming die comprises a male die 1 and a female die 2, wherein the male die 1 and the female die 2 comprise a male die forming part 11 and a female die forming part 21 matched with a part to be processed, and as shown in fig. 3 and 6, the female die forming part 21, the male die forming part 11 and a bulge part 32 of an automobile central channel 3 are matched, so that the drawing forming die has a small end 211 and a small end 111 matched with the small end 321 of the bulge part 32. It should be noted that, in the present embodiment, the small end 111 of the male mold forming portion 11 and the small end 211 of the female mold forming portion 21 continue to extend along the length direction to form the male mold process forming portion 23 and the female mold process forming portion 13, and the male mold process forming portion 23 and the female mold process forming portion 13 need to be cut after the drawing step.
As shown in fig. 3 to 5, the middle part of the female mold process molding part 23 is recessed to form a female mold middle groove 231, the notch of the female mold middle groove 231 is upward, and since the whole middle part of the female mold process molding part 23 formed by extension is recessed downward, a bottom wall 231a and a U-shaped peripheral wall 231b with an open outer end are formed after the recess, i.e. the outer end of the female mold middle groove 231 is open, and the outer end is the end of the female mold process molding part 23 away from the female mold molding part 21 along the length direction.
Referring again to fig. 6, the punch process molding portion 13 is provided with a punch middle through groove 131 corresponding to the die middle groove 231, which is substantially the same as the die middle groove 231, except that the punch middle through groove 131 has no bottom wall, is of a through groove structure, the punch middle through groove 131 is also open at an outer end, the outer end is also an end of the punch process molding portion 13 away from the punch molding portion 11, and the peripheral wall 131a of the punch middle through groove 131 is also U-shaped. The female mold process molding part 23 and the male mold process molding part 13 are open-type molding structures with open outer ends.
In addition, since the female molding portion 23 and the male molding portion 13 are formed by extending corresponding molding portions, and the molding portions have a certain height corresponding to the raised portion 32 of the central channel 3 of the automobile, the two sides of the female middle groove 231 formed by the recessing will form female side protrusions 232 having the same height as the molding portions, the female side protrusions 232 are equivalent to forming protrusions on the two sides of the female middle groove 231, and the protrusions are extension sections formed by extending the two sides of the female molding portion 21, so the female side protrusions 232 are of a groove structure, and the notch direction is the same as the notch direction of the female molding portion 21, specifically, in fig. 3, the notch direction of the female side protrusions 232 is opposite to the notch direction of the female middle groove 231, at this time, the depth of the female side protrusions 232 and the depth of the female middle groove 231 are the same as the height of the small end 211 of the female molding portion 21, which is not required to be completely equal, and it is possible to have a slight height or slightly smaller based on process deviation.
Accordingly, the two sides of the middle through slot 131 of the male die will simultaneously form the male die side protrusions 132, and the male die side protrusions 132 are extension sections formed by extending two sides of the male die forming portion 11, so the male die side protrusions 132 are of a notch structure, and the notch direction is the same as the notch direction of the whole male die forming portion 13, specifically in fig. 6, i.e. the notch of the male die side protrusions 132 faces downwards, and the depth of the male die side protrusions 132 and the middle through slot 131 of the male die is the same as the height of the small end 111 of the male die forming portion 11.
With continued reference to fig. 8, fig. 8 is a schematic view of the lower molding material portion 12 of the lower mold assembly according to the embodiment of the present invention, and fig. 8 is a schematic view of the surface of the lower molding material portion 12.
In this embodiment, the drawing forming die actually includes an upper die assembly and a lower die assembly, the lower die assembly includes a punch 1 and a lower molding portion 12 which are separately provided, the punch 1 includes a punch molding portion 11 and a punch process molding portion 13 which are integrally provided in fig. 6, the molding portion 12 is a member for molding shown in fig. 8, the lower die assembly includes a base, the molding portion 12 and the punch 1 are both provided on the base (not shown in the drawings), the upper die assembly also includes a base, and the above-described die 2 is also provided on the base.
Referring again to fig. 3, the female die 2 also includes a female die pressing portion 22, but the female die pressing portion 22, the female die forming portion 21 and the female die process forming portion 23 are integrally provided, when the female die forming portion 21 extends in the length direction to form the female die process forming portion 23, the female die pressing portion 22 extends forward at the same time, as shown in fig. 3, the length of the female die pressing portion 22 extends all the way to be flush with the female die process forming portion 23, and for the split male die 1, the lower die pressing portions 12 located on both sides of the male die forming portion 11 also extend to be flush with the male die process forming portion 13.
The drawing forming die in this embodiment, when carrying out the drawing process, comprises the following steps:
Placing a plate between the female die 2 positioned above and the lower die pressing part 12 positioned below;
The female die 2 and the lower die pressing part 12 move relatively to press the plate material, for example, the female die 2 can move downwards to be close to the lower die pressing part 12 until the plate material is pressed;
Then, the female die 2 and the male die 1 move relatively, for example, the male die forming part 11 positioned below moves upwards, and as the relative movement of the female die and the male die proceeds, the sheet is drawn to form a primary product of the central passage 3 of the automobile;
Finally, the excess portion of the primary product is cut off, and other work such as edge shaping and the like can be performed, and finally the automobile central passage 3 is formed. It can be understood that the male die 1 and the female die 2 are in a relative motion relationship, and any one of them can do motion, and the male die 1 is not limited to be located below, and the female die 2 can be located below, so that the scheme is not particularly limited.
As can be understood from fig. 3 and 5, the shape change during drawing of the sheet material in the drawing process can be understood, when the sheet material is small, the concave portion process modeling portion 23 and the convex portion process modeling portion 13 extend forwards from the corresponding modeling portions, and the middle portion is sunken, so that the concave portion side protrusions 232 and the convex portion side protrusions 132 formed on two sides can control the sheet material on the side to flow towards the middle, for the sheet material on the middle before drawing, the concave portion middle groove 231 and the convex portion middle through groove 131 can control the flow speed of the sheet material on the middle, and more importantly, can absorb the redundant sheet material when the small end is formed, and the whole concave portion process modeling portion 23 and the convex portion process modeling portion 21 are of an open design with open outer ends, and the flow directions of the sheet materials are mainly along the width direction, so that the sheet material is not easy to be stacked together to form wrinkles. Therefore, the female die 2 and the male die 1 with the open type process modeling part structure can increase the section length of the process modeling part in the width direction, control the inflow amount and inflow direction of the plate in the width direction, absorb redundant plate materials, reduce or even eliminate the phenomenon that the part to be processed is locally wrinkled at the small end in the deep drawing process, avoid the damage of the die, improve the production efficiency and reduce the production cost, so as to realize the normal mass production of the part to be processed.
Moreover, because the process modeling part formed by extension is used as a pressing material at the same time, the pressing material effect is better, so that the required pressing material surface of the small end can be reduced in the length direction of the part, the size of the plate required by punching is obviously reduced, the material utilization rate is improved, the production cost can be reduced, and the economic benefit and the market competitiveness are improved. For the central passage of the automobile, the length dimension of the plate is obviously reduced, and the material utilization rate can be improved by about 4 percent.
In the above embodiment, the female mold process molding part 23 and the male mold process molding part 13 are recessed in the middle to form a middle groove and a middle through groove, and it is understood that more side protrusions can be provided, and accordingly, flow resistance can be increased and redundant plates can be absorbed. However, the arrangement of the concave die middle groove 231 and the convex die middle through groove 131 can improve the local wrinkling phenomenon, does not influence the smoothness of the plate flow, and can further ensure the quality of the deep-drawn part to be processed.
Referring to fig. 3 and 5 again, the lower molding material portion 12 and the female mold material portion are respectively provided with a lower molding strip groove 122 and a female mold strip groove 222, the lower molding strip groove 122 and the female mold strip groove 222 penetrate through the corresponding lower molding material portion 12 and female mold material portion 22 along the length direction, the two sides corresponding to the male mold forming portion 11 are respectively provided with a lower molding strip groove 122, and the two sides corresponding to the female mold forming portion 21 are respectively provided with a female mold strip groove 222. The lower die strip grooves 122 and the female die strip grooves 222 can increase the flow resistance of the sheet material in the drawing forming process, control the flow speed of the sheet material, slow down the speed of the sheet material flowing into the die cavity, and reduce and avoid wrinkling of the central passage of the automobile.
In addition, the die pressing portion 22 and the lower die pressing portion 12 are further provided with a lower die drawing rib 121 and a die drawing rib 221 extending along the length direction at the end corresponding to the small end, and the lower die drawing rib 121 and the die drawing rib 221 are respectively arranged at the outer sides of the corresponding lower die strip groove 122 and the die strip groove 222, so that the speed of the plate flowing into the die cavity is slowed down.
In the above embodiment, the punch process molding portion 13 is provided with the punch middle through groove 131 corresponding to the die middle groove 231, and at this time, the lower die pressing portion 12 may further include the lower die pressing plate 123, where the lower die pressing plate 123 corresponds to the top of the punch middle through groove 131, so as to better press the sheet material more reliably before drawing. It will be appreciated that the middle portion of the punch technical modeling portion 13 may also be a punch middle groove corresponding to the die middle groove 231, and is not limited to the through groove structure.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296813.1A CN112427552B (en) | 2020-11-18 | 2020-11-18 | Drawing forming die and drawing forming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296813.1A CN112427552B (en) | 2020-11-18 | 2020-11-18 | Drawing forming die and drawing forming process |
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| CN112427552A CN112427552A (en) | 2021-03-02 |
| CN112427552B true CN112427552B (en) | 2025-12-09 |
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| CN202011296813.1A Active CN112427552B (en) | 2020-11-18 | 2020-11-18 | Drawing forming die and drawing forming process |
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| CN214601417U (en) * | 2020-11-18 | 2021-11-05 | 广西汽车集团有限公司 | Deep drawing forming die |
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| JP2506400B2 (en) * | 1988-02-01 | 1996-06-12 | 日産自動車株式会社 | Drawing method |
| CN203018554U (en) * | 2012-11-21 | 2013-06-26 | 北汽福田汽车股份有限公司 | Drawing mould |
| KR101854511B1 (en) * | 2013-05-13 | 2018-05-03 | 신닛테츠스미킨 카부시키카이샤 | Blank, molded plate, method of manufacturing press-molded product and press-molded product |
| CN205463913U (en) * | 2016-01-21 | 2016-08-17 | 苏州市岩金汇电子科技有限公司 | Die and have stamping die of this die |
| ES2776885T3 (en) * | 2016-03-28 | 2020-08-03 | Nippon Steel Corp | Method of manufacturing a press-shaped article |
| CN206083629U (en) * | 2016-09-30 | 2017-04-12 | 安徽江淮汽车集团股份有限公司 | Automobile front pedal draws die surface |
| CN106944549B (en) * | 2017-04-25 | 2018-07-10 | 安徽江淮汽车集团股份有限公司 | A kind of beam piece drawing die |
| CN207308726U (en) * | 2017-09-11 | 2018-05-04 | 安徽江淮汽车集团股份有限公司 | Reinforcing plate drawing die |
| CN207431058U (en) * | 2017-10-25 | 2018-06-01 | 安徽江淮汽车集团股份有限公司 | For the cupping tool of beam piece |
| CN207547359U (en) * | 2017-12-13 | 2018-06-29 | 重庆杰信联众机械有限公司 | A kind of drawing die for preventing the corrugation of automobile exterior panel part and drawing crack |
| CN210208302U (en) * | 2019-05-09 | 2020-03-31 | 重庆骏翔机电技术有限责任公司 | Front wheel casing body drawing die |
| CN210450569U (en) * | 2019-05-09 | 2020-05-05 | 重庆骏翔机电技术有限责任公司 | Front wheel casing front plate drawing module |
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2020
- 2020-11-18 CN CN202011296813.1A patent/CN112427552B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976607A (en) * | 2019-11-29 | 2020-04-10 | 安徽江淮汽车集团股份有限公司 | Drawing process die surface of automobile rear longitudinal beam stamping part and drawing die thereof |
| CN214601417U (en) * | 2020-11-18 | 2021-11-05 | 广西汽车集团有限公司 | Deep drawing forming die |
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| CN112427552A (en) | 2021-03-02 |
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