CN210648102U - Stamping die and stamping equipment - Google Patents
Stamping die and stamping equipment Download PDFInfo
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- CN210648102U CN210648102U CN201921617239.8U CN201921617239U CN210648102U CN 210648102 U CN210648102 U CN 210648102U CN 201921617239 U CN201921617239 U CN 201921617239U CN 210648102 U CN210648102 U CN 210648102U
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Abstract
The utility model discloses a stamping die and stamping equipment, which comprises a lower die holder and an upper die holder, wherein the lower die holder is provided with a male die, and the upper die holder is provided with a female die; the lower die base is provided with a lower die base groove, a lower die base blank holder is arranged in the lower die base groove in a sliding manner, and a push rod for pushing the lower die base blank holder to move towards the upper die base side is further connected to the lower die base; the die comprises a die and is characterized in that a circle of upper die base groove is formed in the periphery of the die and positioned on the upper die base, an upper die base pressure plate capable of being matched and separated with a die holder blank holder is arranged in the upper die base groove in a sliding mode, and a driving mechanism used for driving the upper die base pressure plate to move up and down is arranged on the upper die base. The utility model discloses a stamping die and stamping equipment can effectively avoid the flitch unnecessary to warp, has promoted the quality of product.
Description
Technical Field
The utility model relates to an auto parts makes mould technical field, especially relates to a stamping die and stamping equipment.
Background
The profile characteristics of the inner plate of the front cover of the automobile are complex due to various requirements. The forming process of the inner plate of the front cover has direct influence on the forming result.
In the prior art, a stamping die is generally adopted to manufacture the inner plate of the front cover.
The upper die in the existing stamping die is an integral female die, and the lower die is a blank holder and a male die. When the die works, the plate is placed on the blank holder, and the female die acts on the blank holder; pressing the plate by the blank holder and the female die; the blank holder, the female die and the plate integrally move downwards and contact with the male die to finish forming.
Because before the female die is matched with the male die, the female die acts on the sheet, the sheet can be unnecessarily deformed, and the product quality is preferably improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can promote product quality's stamping die and stamping equipment.
The technical scheme of the utility model provides a stamping die, which comprises a lower die holder and an upper die holder, wherein a male die is arranged on one side of the lower die holder facing the upper die holder, and a female die matched with the male die is arranged on the upper die holder;
the lower die base is provided with a lower die base groove, a lower die base blank holder is arranged in the lower die base groove in a sliding manner, and a push rod for pushing the lower die base blank holder to move towards the upper die base side is further connected to the lower die base;
the die comprises a die and is characterized in that a circle of upper die base groove is formed in the periphery of the die and positioned on the upper die base, an upper die base pressure plate capable of being matched and separated with a die holder blank holder is arranged in the upper die base groove in a sliding mode, and a driving mechanism used for driving the upper die base pressure plate to move up and down is arranged on the upper die base.
Further, the stamping die has an open state, a first closed state and a second closed state;
when the stamping die is in the open state, the upper die holder pressure plate is separated from the lower die holder blank holder, and the female die is separated from the male die; the bottom surface of the upper die holder pressure plate is positioned below the female die, and the top surface of the lower die holder blank holder is positioned above the male die;
when the stamping die is in the first closed state, the upper die holder pressure plate is matched with the lower die holder blank holder, and the female die is separated from the male die;
when the stamping die is in the second closed state, the upper die holder pressure plate is kept matched with the lower die holder blank holder, and the female die is matched with the male die.
Furthermore, a plurality of push rods are arranged on the lower die base.
Further, the driving mechanism is a cylinder or an oil cylinder.
Further, the cylinder is a nitrogen cylinder.
Further, a plurality of driving mechanisms are arranged on the upper die base.
Further, a lower die holder linear guide rail is arranged between the groove wall of the lower die holder groove and the lower die holder blank holder;
the lower die holder linear guide rail is fixedly arranged on the groove wall of the lower die holder groove, and extends towards the upper die holder;
the lower die holder blank holder can be slidably arranged on the lower die holder linear guide rail.
Further, an upper die base linear guide rail is arranged between the groove wall of the upper die base groove and the upper die base pressure plate;
the upper die base linear guide rail is fixedly arranged on the groove wall of the upper die base groove and extends towards the lower die base;
the upper die holder material pressing plate is slidably arranged on the upper die holder linear guide rail.
Furthermore, a lower die holder positioning column extending towards the upper die holder is arranged on the lower die holder, and a lower die holder guide hole is formed in the lower die holder positioning column;
and the upper die base is provided with an upper die base guide column which can be inserted into and pulled out of the guide hole of the lower die base.
The technical scheme of the utility model also provides a stamping device, which comprises a lower press, an upper press, a hydraulic driving device and any one of the stamping dies;
an upper die base in the stamping die is fixedly arranged on the upper press, and a lower die base in the stamping die is fixedly arranged on the lower press;
and a push rod in the stamping die penetrates through the lower press and is connected with the hydraulic driving device.
By adopting the technical scheme, the method has the following beneficial effects:
the utility model provides a stamping die and stamping equipment press the flitch through setting up the upper die base on the upper die base, when processing the flitch, press the flitch to move down through actuating mechanism drive upper die base earlier and clip the edge of flitch with the cooperation of die holder blank holder, then wholly move down upper die base, die, upper die base and press flitch and die holder blank holder again, carry out stamping forming to the flitch until die and terrace die cooperation to can effectively avoid flitch unnecessary to warp, promote the quality of product.
Drawings
Fig. 1 is a perspective view of a stamping die according to an embodiment of the present invention;
FIG. 2 is a perspective view of the upper die holder;
FIG. 3 is a perspective view of the lower die base;
FIG. 4 is a cross-sectional view of a stamping die;
FIG. 5 is a cross-sectional view of the upper die holder;
FIG. 6 is a cross-sectional view of the lower die holder;
fig. 7 is a half sectional view of a punching apparatus according to an embodiment of the present invention in an opened state;
fig. 8 is a half sectional view of the punching apparatus shown in fig. 7 in a closed state.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1-6, an embodiment of the present invention provides a stamping die, which includes a lower die holder 1 and an upper die holder 2, wherein a male die 11 is disposed on the lower die holder 1 and on one side of the upper die holder 2, and a female die 21 for cooperating with the male die 11 is disposed on the upper die holder 2.
Wherein, a circle of lower die holder grooves 10 are arranged on the lower die holder 1 around the convex die 11, a lower die holder blank holder 12 is arranged in the lower die holder grooves 10 in a sliding manner, and a push rod 13 for pushing the lower die holder blank holder 12 to move towards the upper die holder 2 is further connected to the lower die holder 1.
A circle of upper die holder grooves 20 are formed in the upper die holder 2 around the female die 21, an upper die holder pressure plate 22 capable of being matched and separated with the lower die holder pressure ring 12 is arranged in the upper die holder grooves 20 in a sliding mode, and a driving mechanism 23 used for driving the upper die holder pressure plate 22 to move up and down is arranged on the upper die holder 2.
The utility model provides a stamping die mainly used stamping forming car's protecgulum inner panel.
The stamping die comprises a lower die holder 1 and an upper die holder 2, wherein the lower die holder 1 is generally fixedly arranged on a lower press, and the upper die holder 2 is generally fixed on an upper press.
A female die 21 is arranged in the middle of the upper die holder 2, and the female die 21 is installed in the upper die holder 21 through a female die pin 25. The female mold 21, also called impression, is the working part of the outer surface of the molded article.
A male die 11 is arranged in the middle of the lower die holder 1, and the male die 11 is installed in the lower die holder 1 through a male die pin 15. The punch 11, which is also called a punch pin, a punch, a male die, etc., is a working part for forming the inner surface of the product.
The bottom surface of the upper die holder 2 is provided with a circle of upper die holder groove 20 which surrounds the periphery of the female die 21. An upper die holder pressure plate 22 is arranged in the upper die holder groove 20, and the upper die holder pressure plate 22 is in clearance fit with the upper die holder groove 20 and can slide up and down in the upper die holder groove 20 to extend out of the upper die holder groove 20 or retract to reset.
The upper die holder 2 is further provided with a driving mechanism 23, and the output end of the driving mechanism 23 is connected with the upper die holder pressure plate 22. The driving mechanism 23 is used for driving the upper die holder pressing plate 22 to slide up and down in the upper die holder groove 20. The driving mechanism 23 may be a cylinder, a motor linkage assembly, or the like.
The top surface of the lower die holder 1 is provided with a circle of lower die holder groove 10 which surrounds the periphery of the convex die 11. A lower die holder blank holder 12 is arranged in the lower die holder groove 10, and the lower die holder blank holder 12 is in clearance fit with the lower die holder groove 10 and can slide up and down in the lower die holder groove 10 to extend out of the lower die holder groove 10 or retract to reset.
A push rod 13 is arranged on the lower die holder 1, one end of the push rod 13 is connected with the lower die holder blank holder 12, and the push rod is also connected with an external hydraulic driving device and used for pushing the lower die holder blank holder 12 to move upwards and extend out of the upper part of the lower die holder groove 10.
The lower shoe blankholder 12 is a blankholder for molding or clamping the edge of the flitch. The upper die holder blade 22 is a platen for molding or pressing the edges of the flitch.
Before the material plate is machined, when the stamping die is in an open state, the lower die holder blank holder 12 is pushed by the push rod 13 to move upwards, and the top surface of the lower die holder blank holder 12 is positioned above the top surface of the male die 11. The upper die holder pressure plate 22 is pushed by the driving mechanism 23 to move downwards, and the bottom surface of the upper die holder pressure plate 22 is positioned below the female die 21.
After the flitch is put into the stamping die, the upper press drives the upper die holder 2 to move downwards. The upper die holder 2 drives the female die 21, the driving mechanism 23 and the upper die holder pressure plate 22 to integrally move downwards until the upper die holder pressure plate 22 and the lower die holder pressure ring 12 are matched to clamp the material plate. At this moment, the female die 21 and the male die 11 are not matched, the female die 21 and the male die 11 are still in a separated state, the female die 21 cannot be in contact with a material plate, and pressure influence on the material plate cannot be caused.
After the upper die holder pressure plate 22 and the lower die holder blank holder 12 are matched to clamp the flitch, the upper die holder 2 is continuously moved downwards, and at the moment, the height of the upper die holder pressure plate 22 is kept unchanged until the retraction stroke of the driving mechanism 23 is finished.
After the stroke of the driving mechanism 23 is finished, the upper die holder 2 is continuously moved downwards, the lower die holder blank holder 12 is pushed to move downwards through the upper die holder blank holder 22, and after the lower die holder blank holder 12 moves downwards for a preset distance, the female die 21 and the male die 11 are matched with a stamping plate to form the required part.
When the die 21 and the punch 11 are matched to punch the flitch, the upper die holder pressure plate 22 and the lower die holder blank holder 12 clamp the edge of the flitch, so that unnecessary deformation of the flitch can be effectively avoided, and the product quality is improved.
Preferably, as shown in connection with fig. 4-8, the stamping die has an open state, a first closed state and a second closed state.
When the stamping die is in an open state, the upper die holder pressure plate 22 is separated from the lower die holder pressure ring 12, and the female die 21 is separated from the male die 11. At this time, the bottom surface of the upper die holder blank 22 is located below the female die 21, and the top surface of the lower die holder blank holder 12 is located above the male die 11.
When the stamping die is in the first closed state, the upper die holder pressure plate 22 is matched with the lower die holder pressure ring 12, and the female die 21 is separated from the male die 11.
When the stamping die is in the second closed state, the upper die holder pressure plate 22 is kept matched with the lower die holder pressure ring 12, and the female die 21 is matched with the male die 11.
That is, each stamping process of the stamping die includes three processes or three states, which are respectively: an open state, a first closed state, and a second closed state.
When the stamping die is in an open state, no sheet material is added or stamping is not performed. The upper die holder pressure plate 22 is separated from the lower die holder blank holder 12, and the female die 21 is separated from the male die 11. At this time, the bottom surface of the upper die holder blank 22 is located below the female die 21, and the top surface of the lower die holder blank holder 12 is located above the male die 11. At this point, the sheet material may be placed in the stamping die, with the sheet material covering the lower shoe blankholder 12. Specifically, the lower holder blank 12 is pushed upward by the push rod 13, and the top surface of the lower holder blank 12 is located above the top surface of the punch 11. The upper die holder pressure plate 22 is pushed by the driving mechanism 23 to move downwards, and the bottom surface of the upper die holder pressure plate 22 is positioned below the female die 21.
When the stamping die is in the first closed state, the upper die base 2 is driven to move downwards, and drives the female die 21, the driving mechanism 23 and the upper die base pressure plate 22 to integrally move downwards until the upper die base pressure plate 22 and the lower die base pressure ring 12 are matched to clamp the flitch. At this moment, the female die 21 and the male die 11 are not matched, the female die 21 and the male die 11 are still in a separated state, the female die 21 cannot be in contact with a material plate, and pressure influence on the material plate cannot be caused. After the upper die holder pressure plate 22 and the lower die holder blank holder 12 are matched to clamp the flitch, the upper die holder 2 is continuously moved downwards, and at the moment, the height of the upper die holder pressure plate 22 is kept unchanged until the retraction stroke of the driving mechanism 23 is finished.
After the stroke of the driving mechanism 23 is finished, the upper die holder 2 is continuously moved downwards, the lower die holder blank holder 12 is pushed to move downwards through the upper die holder blank holder 22, after the lower die holder blank holder 12 moves downwards for a preset distance, the female die 21 and the male die 11 are matched with a stamping plate, and at the moment, the stamping die is in a second closed state. In this state, the upper die holder pressure plate 22 and the lower die holder pressure ring 12 keep matching to clamp the edge of the plate, and the female die 21 and the male die 11 match to punch the plate to form the required parts.
Preferably, as shown in fig. 4-6 and 7-8, a plurality of push rods 13 are disposed on the lower die holder, and the push rods 13 are uniformly distributed around the lower die holder blank holder 12, so as to facilitate integrally pushing the lower die holder blank holder 12 to move upward.
Preferably, the driving mechanism 23 is a cylinder or an oil cylinder, which is convenient for material selection and installation.
Preferably, the air cylinder is a nitrogen cylinder, the nitrogen cylinder can be a gas spring or a buffer, an external control mechanism (an air charging mechanism or a liquid charging mechanism) is not needed, and the installation and the operation are convenient.
Preferably, a plurality of driving mechanisms 23 are arranged on the upper die holder 2, and the plurality of driving mechanisms 23 are uniformly distributed around the upper die holder pressure plate 22, so as to be beneficial to integrally pushing the upper die holder pressure plate 22 to move downwards.
Preferably, as shown in fig. 6, a lower die holder linear guide 15 is disposed between the groove wall of the lower die holder groove 10 and the lower die holder blank holder 12.
The lower die holder linear guide 15 is fixedly installed on the groove wall of the lower die holder groove 10, and the lower die holder linear guide 15 extends towards the upper die holder 2.
The lower die holder blank holder 12 is slidably disposed on a lower die holder linear guide 15.
The lower die holder linear guide 15 can be a convex rail or a sliding groove, the straight line of the lower die holder linear guide 15 extends upwards, the lower die holder blank holder 12 is installed on the lower die holder linear guide 15, and the lower die holder blank holder can slide on the lower die holder linear guide 15, so that the guide is provided for the movement of the lower die holder blank holder 12, and the deviation direction is avoided.
Preferably, as shown in fig. 6, an upper die holder linear guide 25 is disposed between the groove wall of the upper die holder groove 20 and the upper die holder pressure plate 22.
The upper die holder linear guide 25 is fixedly arranged on the groove wall of the upper die holder groove 20, and the upper die holder linear guide 25 extends towards the lower die holder 1.
The upper die holder material pressing plate 22 is slidably disposed on the upper die holder linear guide 25.
The upper die holder linear guide 25 can be a convex rail or a sliding groove, the straight line of the upper die holder linear guide 25 extends upwards, and the upper die holder pressure plate 22 is installed on the upper die holder linear guide 25 and can slide on the upper die holder linear guide 25, so that the movement of the upper die holder pressure plate 22 is guided, and the deviation direction is avoided.
Preferably, as shown in fig. 2-3, the lower die holder 1 is provided with lower die holder positioning pillars 14 extending toward the upper die holder 2, and the lower die holder positioning pillars 14 are provided with lower die holder guiding holes 141.
The upper die base 2 is provided with upper die base guide posts 24 which can be inserted into and pulled out of the lower die base guide holes 141.
When the upper die holder 2 is driven to move downwards by a preset distance, the upper die holder guide posts 24 are inserted into the lower die holder guide holes 141, thereby completing the positioning and guiding functions. When the upper die holder 2 is driven to move up by a preset distance, the upper die holder guide posts 24 are pulled out from the lower die holder guide holes 141, and the stamping die is in an open state.
As shown in fig. 7-8, an embodiment of the present invention provides a stamping apparatus, which includes a lower press 3, an upper press 4, a hydraulic driving device 5, and a stamping die according to any of the foregoing embodiments.
An upper die base 2 in the stamping die is fixedly arranged on an upper press 4, and a lower die base 1 in the stamping die is fixedly arranged on a lower press 3.
A push rod 13 in the stamping die penetrates through the lower press 3 and is connected with the hydraulic driving device 5.
The stamping equipment mainly comprises a lower press 3, an upper press 4, a hydraulic driving device 5 and a stamping die.
For the structure, structure and working principle of the stamping die, please refer to the description part of the stamping die, which is not repeated herein.
The hydraulic driving device 5 can be a hydraulic oil cylinder, a piston rod of the hydraulic oil cylinder is connected with a push plate 51, and the lower end of the push rod 13 is arranged on the push plate 51.
The upper press machine 4 is used for driving the upper die holder 2 to move up and down, and the lower press machine 3 can be fixed and used for installing and supporting the lower die holder 1.
The lower press 3 has a through hole 31 for the push rod 13 to pass through.
The utility model provides a stamping equipment operating procedure as follows:
before processing the material plate, when the stamping device is in an open state, the hydraulic driving device 5 pushes the push rod 13 to move upwards through the push plate 51, the lower die holder blank holder 12 is pushed by the push rod 13 to move upwards, and the top surface of the lower die holder blank holder 12 is positioned above the top surface of the male die 11. The upper die holder pressure plate 22 is pushed by the driving mechanism 23 to move downwards, and the bottom surface of the upper die holder pressure plate 22 is positioned below the female die 21.
After the flitch is put into a stamping die, the upper press 4 drives the upper die holder 2 to move downwards. The upper die holder 2 drives the female die 21, the driving mechanism 23 and the upper die holder pressure plate 22 to integrally move downwards until the upper die holder pressure plate 22 and the lower die holder pressure ring 12 are matched to clamp the material plate. At this moment, the female die 21 and the male die 11 are not matched, the female die 21 and the male die 11 are still in a separated state, the female die 21 cannot be in contact with a material plate, and pressure influence on the material plate cannot be caused.
After the upper die holder pressure plate 22 and the lower die holder blank holder 12 are matched to clamp the material plate, the upper press 4 continues to move the upper die holder 2 downwards, and at the moment, the height of the upper die holder pressure plate 22 is kept unchanged until the retraction stroke of the driving mechanism 23 is finished.
After the stroke of the driving mechanism 23 is finished, the upper press 4 continues to move the upper die holder 2 downwards, the resistance of the push rod 13 is overcome, the upper die holder pressure plate 22 pushes the lower die holder pressure ring 12 to move downwards, and after the lower die holder pressure ring 12 moves downwards for a preset distance, the female die 21 and the male die 11 are matched with a stamping plate to form the required part.
When the die 21 and the punch 11 are matched to punch the flitch, the upper die holder pressure plate 22 and the lower die holder blank holder 12 clamp the edge of the flitch, so that unnecessary deformation of the flitch can be effectively avoided, and the product quality is improved.
After the punching is finished, the upper press 4 drives the upper die holder 2 to move upwards, and the driving mechanism 23 drives the upper die holder pressure plate 22 to reset. The hydraulic driving device 5 drives the push rod 13 to drive the lower die holder blank holder 12 to reset.
To sum up, the utility model provides a stamping die and stamping equipment presses the flitch through setting up the upper die base on the upper die base, when processing the flitch, press the flitch to move down through actuating mechanism drive upper die base earlier and carry the edge of flitch with the cooperation of die holder blank holder, then wholly move down upper die base, die, upper die base press flitch and die holder blank holder again, carry out stamping forming to the flitch until die and terrace die cooperation to can effectively avoid flitch unnecessary to warp, promote the quality of product.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. A stamping die is characterized by comprising a lower die base and an upper die base, wherein a male die is arranged on one side, facing the upper die base, of the lower die base, and a female die matched with the male die is arranged on the upper die base;
the lower die base is provided with a lower die base groove, a lower die base blank holder is arranged in the lower die base groove in a sliding manner, and a push rod for pushing the lower die base blank holder to move towards the upper die base side is further connected to the lower die base;
the die comprises a die and is characterized in that a circle of upper die base groove is formed in the periphery of the die and positioned on the upper die base, an upper die base pressure plate capable of being matched and separated with a die holder blank holder is arranged in the upper die base groove in a sliding mode, and a driving mechanism used for driving the upper die base pressure plate to move up and down is arranged on the upper die base.
2. The stamping die of claim 1, wherein the stamping die has an open state, a first closed state, and a second closed state;
when the stamping die is in the open state, the upper die holder pressure plate is separated from the lower die holder blank holder, and the female die is separated from the male die; the bottom surface of the upper die holder pressure plate is positioned below the female die, and the top surface of the lower die holder blank holder is positioned above the male die;
when the stamping die is in the first closed state, the upper die holder pressure plate is matched with the lower die holder blank holder, and the female die is separated from the male die;
when the stamping die is in the second closed state, the upper die holder pressure plate is kept matched with the lower die holder blank holder, and the female die is matched with the male die.
3. The stamping die of claim 1, wherein a plurality of the push rods are disposed on the lower die base.
4. A stamping die according to any of claims 1-3, wherein the drive mechanism is a cylinder or an oil cylinder.
5. The stamping die of claim 4, wherein the cylinder is a nitrogen cylinder.
6. The stamping die of claim 4, wherein a plurality of the drive mechanisms are provided on the upper die base.
7. The stamping die of claim 1, wherein a lower die holder linear guide rail is arranged between the groove wall of the lower die holder groove and the lower die holder blank holder;
the lower die holder linear guide rail is fixedly arranged on the groove wall of the lower die holder groove, and extends towards the upper die holder;
the lower die holder blank holder can be slidably arranged on the lower die holder linear guide rail.
8. The stamping die of claim 1, wherein an upper die holder linear guide is disposed between a slot wall of the upper die holder groove and the upper die holder blade;
the upper die base linear guide rail is fixedly arranged on the groove wall of the upper die base groove and extends towards the lower die base;
the upper die holder material pressing plate is slidably arranged on the upper die holder linear guide rail.
9. The stamping die as claimed in claim 1, wherein a lower die holder positioning column extending towards the upper die holder is arranged on the lower die holder, and a lower die holder guide hole is arranged on the lower die holder positioning column;
and the upper die base is provided with an upper die base guide column which can be inserted into and pulled out of the guide hole of the lower die base.
10. A press apparatus comprising a lower press, an upper press, a hydraulic drive device and a press die as claimed in any one of claims 1 to 9;
an upper die base in the stamping die is fixedly arranged on the upper press, and a lower die base in the stamping die is fixedly arranged on the lower press;
and a push rod in the stamping die penetrates through the lower press and is connected with the hydraulic driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921617239.8U CN210648102U (en) | 2019-09-26 | 2019-09-26 | Stamping die and stamping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921617239.8U CN210648102U (en) | 2019-09-26 | 2019-09-26 | Stamping die and stamping equipment |
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| CN210648102U true CN210648102U (en) | 2020-06-02 |
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| CN201921617239.8U Active CN210648102U (en) | 2019-09-26 | 2019-09-26 | Stamping die and stamping equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845864A (en) * | 2020-12-21 | 2021-05-28 | 东风汽车有限公司 | Continuous shallow drawing forming die and method for inner plate of trunk |
| CN113232224A (en) * | 2021-05-20 | 2021-08-10 | 奇瑞汽车股份有限公司 | Stamping die device |
-
2019
- 2019-09-26 CN CN201921617239.8U patent/CN210648102U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845864A (en) * | 2020-12-21 | 2021-05-28 | 东风汽车有限公司 | Continuous shallow drawing forming die and method for inner plate of trunk |
| CN113232224A (en) * | 2021-05-20 | 2021-08-10 | 奇瑞汽车股份有限公司 | Stamping die device |
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