CN210847928U - Integrated stamping device - Google Patents
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- CN210847928U CN210847928U CN201921146744.9U CN201921146744U CN210847928U CN 210847928 U CN210847928 U CN 210847928U CN 201921146744 U CN201921146744 U CN 201921146744U CN 210847928 U CN210847928 U CN 210847928U
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Abstract
The utility model provides an integration stamping device, the device includes: the side wall of the heating furnace is provided with a first opening and closing door; the blanking die is positioned in the heating furnace; the stamping die is arranged in the heating furnace; the first blank transfer device is arranged in the heating furnace and used for transferring blanks between the blanking die and the stamping die; the liquid nitrogen quenching device is internally provided with a lifting mechanism, and the top of the lifting mechanism is connected with the stamping die so as to drive the stamping die to enter the liquid nitrogen quenching device from the heating furnace. In the utility model, the blanking die and the stamping die are integrated in the heating furnace, so that the heating-blanking-stamping process is integrated in the heating furnace, thereby effectively saving the transportation time, labor and field of the blank; the liquid nitrogen quenching device and the heating furnace are integrated, so that the stamped blank is timely cooled, and extra transportation time is not needed.
Description
Technical Field
The utility model relates to a punching press technical field particularly, relates to an integration stamping device.
Background
With the energy conservation and emission reduction becoming one of the main development directions of the current country and even the world, automobile enterprises begin to use high-strength steel plates and even ultra-high-strength steel plates to reduce the weight of automobile bodies at many times at present, wherein the ultra-high-strength steel plate hot stamping technology is an effective way for realizing the light weight of automobiles and achieving the purposes of energy conservation and emission reduction. The hot stamping forming technology is a new technology specially used for forming high-strength steel plate stamping parts. Firstly, the raw material is blanked in a blanking die, then the blanked blank is heated to above 950 ℃ in a heating furnace, then the blank is transferred into the die for stamping, and then pressure maintaining quenching is carried out in the die for a period of time, the structure of the stamping part prepared by the method is martensite, and the strength is as high as 1500 MPa. However, in actual production, the following problems are found in the current hot stamping technology:
(1) the hot stamping process is complex, the number of steps is large, and the automation rate is low;
(2) the current hot stamping process comprises the following steps: blanking, heating in a heating furnace, stamping in a die and quenching in the die, wherein the process is long and wastes time; such as: the blanks falling from the blanking die can be transported to the heating furnace far away, and additional transportation time, manpower and storage space are needed.
(3) The stamping part is cooled in the die through the cooling water channel, and the processing cost of the cooling water channel in the die is expensive, so that the production cost is high;
(4) because the stamping part is not in direct contact with cooling water, the cooling speed is slow, and the time required for pressure maintaining and quenching in the die is long.
Disclosure of Invention
In view of this, the utility model provides an integration stamping device aims at solving the longer problem of present stamping process required time.
The utility model provides an integration stamping device, the device includes: a heating furnace is added, and a first opening and closing door is arranged on the side wall of the heating furnace; the blanking die is positioned in the heating furnace; the stamping die is arranged in the heating furnace; the first blank transfer device is arranged in the heating furnace and used for transferring blanks between the blanking die and the stamping die; the liquid nitrogen quenching device is internally provided with a lifting mechanism, and the top of the lifting mechanism is connected with the stamping die so as to drive the stamping die to enter the liquid nitrogen quenching device from the heating furnace.
Further, in the integrated punching device, the surface of the blanking die is coated with a first heat insulation layer.
Further, among the above-mentioned integrated stamping device, the blanking mould includes: the first male die is connected with the bottom wall of the heating furnace; the first guide pillar and guide sleeve is arranged on the side surface of the first male die and is connected with the bottom wall of the heating furnace; the first die holder is connected with the first guide pillar guide sleeve in a sliding manner; the first die is connected with the first die holder, and the position of the first die corresponds to that of the first male die.
Further, in the integrated punching device, the surface of the punching die is coated with the second heat insulation layer.
Further, in the above-mentioned integrated press device, the press die includes: the bottom wall of the heating furnace is provided with a second opening and closing door, the position of the second opening and closing door corresponds to that of the second male die, and the top of the lifting mechanism penetrates through the second opening and closing door and is connected with the bottom of the second male die; the second guide pillar guide sleeve is arranged on the side surface of the second male die and is connected with the bottom wall of the heating furnace; the second die holder is connected with the second guide pillar guide sleeve in a sliding manner; and the second female die is connected with the second die holder, and the position of the second female die corresponds to that of the second male die.
Further, in the above integrated press device, the liquid nitrogen quenching device includes: the heating furnace comprises a heating furnace, a liquid nitrogen pool, a second opening and closing door, a third opening and closing door and a heating furnace, wherein one part of the top wall of the liquid nitrogen pool is one part of the bottom wall of the heating furnace; and the lifting mechanism is connected with the bottom wall of the liquid nitrogen pool in a sliding manner, and is used for driving the stamping die to descend into the liquid nitrogen pool through the second opening and closing door and ascend out of the liquid nitrogen pool through the third opening and closing door.
Further, in the above integrated punching apparatus, the liquid nitrogen quenching apparatus further includes: and the circulating device is communicated with the liquid nitrogen pool so as to cool and circulate the liquid nitrogen in the liquid nitrogen pool.
Further, in the above-mentioned integrated punching device, the circulating device includes: a conversion device, a pump and a liquid nitrogen tank; the liquid nitrogen tank is provided with a first outlet and an inlet, the first outlet is sequentially communicated with the conversion device and the inlet of the pump through a conveying pipeline, and the second outlet of the pump is respectively communicated with the inlet of the liquid nitrogen tank and the liquid nitrogen tank; the liquid nitrogen tank is arranged in the thermostatic chamber.
Further, in the integrated punching device, a second blank transfer device and a third blank transfer device are respectively arranged on two sides of the heating furnace.
Further, in the above-mentioned integrated press device, the lifting mechanism includes: the shell is arranged in the liquid nitrogen quenching device; the pneumatic cylinder, the pneumatic cylinder sets up in the casing, and the flexible portion of pneumatic cylinder is worn out the casing and is connected with stamping die's bottom.
The utility model discloses in, blanking mould, stamping die and first blank transfer device all set up in the heating furnace, and blanking mould and stamping die are integrated in the heating furnace promptly to make heating-blanking-punching press technology go on in the heating furnace together integratively, saved the transportation time, manpower and the place of blank effectively. The liquid nitrogen quenching device is arranged below the heating furnace, so that the liquid nitrogen quenching device and the heating furnace are integrated into a whole, the blank can be transferred into the liquid nitrogen quenching device from the heating furnace through the lifting mechanism arranged in the liquid nitrogen quenching device and connected with the stamping die, the timely cooling of the blank after stamping is guaranteed, the liquid nitrogen quenching device is convenient and fast, extra transportation time is not needed, and manpower and material resources are saved. Meanwhile, the liquid nitrogen has small quenching deformation and cracking, and the cooling speed is five times greater than that of water, so that the martensite can be completely transformed, and the residual austenite amount is extremely small.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of an operation state of an integrated punching device according to an embodiment of the present invention;
fig. 2 is a schematic view of another use state of the integrated punching device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a preferred structure of the integrated punching device provided in the present embodiment is shown. As shown, the apparatus comprises: the device comprises a heating furnace 1, a blanking die 2, a stamping die 3, a first blank transfer device 4 and a liquid nitrogen quenching device 6. The heating furnace 1 is a hood-type heating furnace, an overhead crane 15 is connected above the heating furnace 1, and a first opening and closing door 11 is arranged on the side wall of the heating furnace 1. The blanking die 2, the stamping die 3 and the first blank transfer device 4 are arranged in the heating furnace 1, the blanking die 2 is used for blanking the blank 5, and the blanking die 2 is arranged close to the first opening and closing door 11 so that the blank 5 can be placed in the blanking die 2 through the first opening and closing door 11. The first blank transfer device 4 is arranged between the blanking die 2 and the stamping die 3 and used for transferring the blank 5 which is blanked in the blanking die 2 into the stamping die 3, and the stamping die 3 performs a stamping process on the blank 5 which is blanked. In particular, the first material transfer device 4 is a first robot. The liquid nitrogen quenching device 6 is positioned below the heating furnace 1, the lifting mechanism 7 is arranged in the liquid nitrogen quenching device, and the top of the lifting mechanism 7 is connected with the stamping die 3, so that the stamping die 3 in the heating furnace 1 can be brought into the liquid nitrogen quenching device 6, and the blank 5 to be stamped is brought into the liquid nitrogen quenching device 6 from the heating furnace 1 so as to quench the stamped blank 5.
In this embodiment, the blanking die 2, the stamping die 3 and the first blank transferring device 4 are all disposed in the heating furnace 1, that is, the blanking die 2 and the stamping die 3 are integrated in the heating furnace 1, so that the heating-blanking-stamping processes are integrated in the heating furnace 1, and the transportation time, labor and space of the blank 5 are effectively saved. Liquid nitrogen quenching unit 6 sets up in heating furnace 1's below to be integrated as an organic whole with liquid nitrogen quenching unit 6 and heating furnace 1, through set up in liquid nitrogen quenching unit 6 and the elevating system 7 that is connected with stamping die 3, can with blank 5 from 1 internal transfer of heating furnace to liquid nitrogen quenching unit 6 in, both guaranteed the timely cooling to blank 5 after the punching press, convenient and fast need not extra transit time again, saved manpower and materials. Meanwhile, the liquid nitrogen has small quenching deformation and cracking, and the cooling speed is five times greater than that of water, so that the martensite can be completely transformed, and the residual austenite amount is extremely small.
In the above embodiment, the outer surface of the blanking die 2 is coated with the first thermal insulation layer, the outer surface of the stamping die 3 is coated with the second thermal insulation layer, and the first thermal insulation layer and the second thermal insulation layer are used for thermal insulation between the blanking die 2 and the stamping die 3, and can improve the high temperature resistance of the blanking die 2 and the stamping die 3. Because the first heat insulation layer and the second heat insulation layer have a heat insulation effect, cooling water channels are not needed in the blanking die 2 and the stamping die 3, so that the structures of the blanking die 2 and the stamping die 3 are simplified, and the manufacturing cost of the blanking die 2 and the stamping die 3 is reduced. In specific implementation, the first heat insulation layer and the second heat insulation layer are both ceramic thermal barrier coatings.
In the above embodiment, the blanking die 2 includes: the first punch 21, the first guide pillar guide 22, the first die holder 23 and the first die 24. Wherein, first terrace die 21 is connected with the diapire of heating furnace 1, and first guide pillar guide 22 is two, and two first guide pillar guide 22 set up respectively in the both sides of first terrace die 21, and the bottom of two first guide pillar guide 22 all is connected with the diapire of heating furnace 1. The first die holder 23 is connected to the top ends of the two first guide posts 22 and located right above the first punch 21, and the first die holder 23 can slide along the first guide posts 22 and can be fixed at a suitable height. The first die 24 is connected to the bottom of the first die holder 23 and is arranged corresponding to the first punch 21, that is, the first die 24 is located right above the first punch 21, and the first die holder 23 can drive the first die 24 to move up and down, so that the first die 24 and the first punch 21 are matched to blank 5. In specific implementation, the outer surfaces of the first male die 21 and the first female die 24 are coated with a first heat insulation layer.
The press die 3 includes: a second punch 31, a second guide post guide sleeve 32, a second die holder 33 and a second die 34. The bottom wall of the heating furnace 1 is provided with a second opening and closing door 12, and the position of the second opening and closing door 12 corresponds to the position of the second punch 31, that is, the second opening and closing door 12 is positioned right below the second punch 31. The top of the lifting mechanism 7 penetrates through the second opening and closing door 12 and is connected with the bottom of the second male die 31, so that the second male die 21 positioned in the heating furnace 1 can be brought into the liquid nitrogen quenching device 6. The number of the second guide post guide sleeves 32 is two, the two second guide post guide sleeves 32 are respectively arranged on two sides of the second male die 31, the bottom ends of the two second guide post guide sleeves 32 are connected with the bottom wall of the heating furnace 1, and during specific implementation, the connecting positions of the two second guide post guide sleeves 32 and the bottom wall of the heating furnace 1 do not interfere with the position of the second opening and closing door 12. The second die holder 33 is connected to the top ends of the two second guide posts 32 and is located right above the second punch 31, and the second die holder 33 can be slidably connected to the second guide posts 32 and can be fixed at a suitable height. The second die 34 is connected to the bottom of the second die holder 33 and is arranged corresponding to the second punch 31, that is, the second die 34 is located right above the second punch 31, and the second die holder 33 can drive the second die 34 to move up and down, so that the second die 34 and the second punch 31 are matched to punch the blanked blank 5. In specific implementation, the outer surfaces of the second male die 31 and the second female die 34 are coated with a second heat insulation layer.
In the above embodiment, the liquid nitrogen quenching apparatus 6 includes: a liquid nitrogen bath 61. The liquid nitrogen tank 61 is filled with liquid nitrogen, and a part of the liquid nitrogen tank 61 is positioned below the heating furnace 1, so that a part of the top wall of the liquid nitrogen tank 61 is also a part of the bottom wall of the heating furnace 1, and the second opening and closing door 12 is arranged on the shared part of the bottom wall of the heating furnace 1 and the top wall of the liquid nitrogen tank 61, so that the heating furnace 1 can be communicated with the liquid nitrogen tank 61 through the second opening and closing door 12, and the purpose that the blank 5 punched in the heating furnace 1 is transferred into the liquid nitrogen tank 61 by the lifting mechanism 7 can be realized. The top wall of the part of the liquid nitrogen tank 61 not located below the heating furnace 1 is provided with a third open-close door 62, that is, the third open-close door 62 is located outside the heating furnace 1. The bottom of the lifting mechanism 7 is slidably connected with the bottom wall of the liquid nitrogen pool 6, and referring to fig. 2, after the blank 5 is punched, the second opening and closing door 12 is opened, the lifting mechanism 7 descends, and the blank 5 is brought into the liquid nitrogen pool 61. The lifting mechanism 7 is connected with the bottom wall of the liquid nitrogen pool 61 in a sliding mode through the sliding rail 16, after the blank 5 is quenched, the lifting mechanism 7 slides to the position below the third opening and closing door 62, the third opening and closing door 62 is opened, the lifting mechanism 7 ascends to bring the blank 5 out of the liquid nitrogen pool 61, finally, the lifting mechanism 7 returns to the initial position through descending, sliding and ascending, and the second opening and closing door 12 and the third opening and closing door 62 are closed.
In the above embodiment, the quenching apparatus further includes: and the circulating device 8 is communicated with the liquid nitrogen pool 61, so that the liquid nitrogen in the liquid nitrogen pool 61 is cooled and recycled. In specific implementation, the circulation device 8 includes: switching device 81, pump 82 and liquid nitrogen tank 83. The liquid nitrogen pool 61 is provided with a first outlet 63 and an inlet 64, the first outlet 63 of the liquid nitrogen pool 61 is sequentially communicated with the conversion device 81 and an inlet 84 of the pump 82 through a conveying pipeline, a second outlet 85 of the pump 82 is respectively communicated with the inlet 64 and the liquid nitrogen tank 83, and a pipeline for communicating the second outlet 85 of the pump 82 with the inlet 64 of the liquid nitrogen pool 61 is provided with the control switch 14. The mixture of liquid nitrogen and nitrogen gas flows out of the first outlet 63, the nitrogen gas is converted into liquid nitrogen after the mixture enters the conversion device 81, the liquid nitrogen is conveyed into a liquid nitrogen tank 83 through a pump 82 to be stored, and the liquid nitrogen in the liquid nitrogen tank 83 flows into the liquid nitrogen pool 61 to be recycled. The liquid nitrogen tank 83 is disposed in the thermostatic chamber 9 and can ensure a low temperature of liquid nitrogen.
In the above embodiments, the second blank transfer device 10 and the third blank transfer device 13 are respectively disposed on both sides of the heating furnace 1, the second blank transfer device 10 is disposed near the first opening/closing door 11 to transfer the blank 5 into the blanking die 2 when the first opening/closing door 11 is opened, and then the first opening/closing door 11 is closed. The third billet transfer device 13 is arranged close to the third opening and closing door 62, and after the quenched billet 5 is sent out of the liquid nitrogen pool 61 by the lifting mechanism 7, the quenched billet 5 is picked up by the third billet transfer device 13. In a specific embodiment, the second material transfer device 10 is a second robot, and the third material transfer device 13 is a third robot.
The lifting mechanism 7 includes: a housing 71 and a hydraulic cylinder 72. The shell 71 is arranged in the liquid nitrogen pool 61 of the liquid nitrogen quenching device 6, and the bottom of the shell 71 is slidably connected with the bottom wall of the liquid nitrogen pool 61 through the rail 16. The hydraulic cylinder 72 is provided in the housing 71, and the expansion portion 73 of the hydraulic cylinder 72 is inserted through the housing 71 and the second opening/closing door 12, and is connected to the bottom of the second punch 31 of the press die 3.
The steps of the stamping process of the blank 5 by adopting the integrated stamping device provided by the embodiment are as follows:
(1) obtaining a blank 5;
(2) opening the first opening and closing door 11, placing the blank 5 in the blanking die 2 by the second blank transfer device 10, closing the first opening and closing door 11, starting the heating furnace 1, and heating the blank 5; heating the blank 5 to 950 ℃ and preserving heat for a certain time to homogenize the structure of the blank 5;
(3) after the blank 5 is heated, the heated blank 5 is blanked in the blanking die 2;
(4) after blanking is finished, the heating furnace 1 is closed, meanwhile, the first blank transfer device 4 puts the blanked blank 5 into the stamping die 3, and the stamping die 3 quickly finishes the stamping forming process of the blank 5;
(5) after the stamping is finished, the second female die 34 of the stamping die 3 moves upwards, the second opening and closing door 12 is opened, the lifting mechanism 7 drives the second female die 34 to enter the liquid nitrogen tank 61, the control switch 14 is opened, and the stamped blank 5 is cooled and quenched within 10s continuously;
(6) after quenching is finished, the control switch 14 is closed, the third opening and closing door 62 is opened, the lifting mechanism 7 drives the second female die 34 to slide rightwards to the position below the third opening and closing door 62, then the second female die 34 is driven to move upwards to the outside of the liquid nitrogen pool 61, finally, the third blank transfer device 13 grabs the quenched blank 5 to place the part storage area, and the quenched blank 5 is conveyed to a warehouse by a conveying vehicle.
If the blank 5 is blanked and heated first and then the blank is heated, the sizes and the positions of some positioning holes on the blanked blank 5 are inaccurate due to the effects of expansion with heat and contraction with cold, so that the blank 5 is heated first to be completely austenitized and then blanked, and the precision of a product obtained by the blank 5 can be improved.
In summary, in the embodiment, the blanking die 2, the stamping die 3 and the first blank transferring device 4 are all disposed in the heating furnace 1, that is, the blanking die 2 and the stamping die 3 are integrated in the heating furnace 1, so that the heating-blanking-stamping processes are integrated in the heating furnace 1, and the transportation time, labor and space of the blank 5 are effectively saved. Liquid nitrogen quenching unit 6 sets up in heating furnace 1's below to be integrated as an organic whole with liquid nitrogen quenching unit 6 and heating furnace 1, through set up in liquid nitrogen quenching unit 6 and the elevating system 7 that is connected with stamping die 3, can with blank 5 from 1 internal transfer of heating furnace to liquid nitrogen quenching unit 6 in, both guaranteed the timely cooling to blank 5 after the punching press, convenient and fast need not extra transit time again, saved manpower and materials. Meanwhile, the liquid nitrogen has small quenching deformation and cracking, and the cooling speed is five times greater than that of water, so that the martensite can be completely transformed, and the residual austenite amount is extremely small.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An integrated stamping device, comprising:
the side wall of the heating furnace is provided with a first opening and closing door;
the blanking die is positioned in the heating furnace;
the stamping die is arranged in the heating furnace;
the first blank transfer device is arranged in the heating furnace and used for transferring blanks between the blanking die and the stamping die;
and the liquid nitrogen quenching device is internally provided with a lifting mechanism, and the top of the lifting mechanism is connected with the stamping die so as to drive the stamping die to enter the liquid nitrogen quenching device from the heating furnace.
2. The integrated stamping device of claim 1,
the surface of the blanking die is coated with a first heat insulation layer.
3. The integrated stamping device of claim 1, wherein the blanking die comprises:
the first male die is connected with the bottom wall of the heating furnace;
the first guide post and guide sleeve is arranged on the side surface of the first male die and is connected with the bottom wall of the heating furnace;
the first die holder is connected with the first guide pillar and guide sleeve in a sliding manner;
the first die is connected with the first die holder, and the position of the first die corresponds to that of the first male die.
4. The integrated stamping device of claim 1,
the surface of the stamping die is coated with a second heat insulation layer.
5. The integrated stamping device of claim 1, wherein the stamping die comprises:
the bottom wall of the heating furnace is provided with a second opening and closing door, the position of the second opening and closing door corresponds to that of the second male die, and the top of the lifting mechanism penetrates through the second opening and closing door and is connected with the bottom of the second male die;
the second guide pillar guide sleeve is arranged on the side surface of the second male die and is connected with the bottom wall of the heating furnace;
the second die holder is connected with the second guide pillar guide sleeve in a sliding manner;
and the second female die is connected with the second die holder, and the position of the second female die corresponds to that of the second male die.
6. The integrated stamping device of claim 5, wherein the liquid nitrogen quenching device comprises:
a liquid nitrogen pool, wherein one part of the top wall of the liquid nitrogen pool is one part of the bottom wall of the heating furnace, the second opening and closing door is arranged at the shared part of the top wall of the liquid nitrogen pool and the bottom wall of the heating furnace, a third opening and closing door is arranged on the top wall of the liquid nitrogen pool, and the third opening and closing door is arranged outside the heating furnace;
the lifting mechanism is connected with the bottom wall of the liquid nitrogen pool in a sliding mode and used for driving the stamping die to descend into the liquid nitrogen pool through the second opening and closing door and ascend to the outside of the liquid nitrogen pool through the third opening and closing door.
7. The integrated stamping device of claim 6, wherein the liquid nitrogen quenching device further comprises:
and the circulating device is communicated with the liquid nitrogen pool so as to cool and circulate the liquid nitrogen in the liquid nitrogen pool.
8. The integrated stamping apparatus of claim 7, wherein the circulation apparatus comprises: a conversion device, a pump and a liquid nitrogen tank; wherein the content of the first and second substances,
the liquid nitrogen tank is provided with a first outlet and an inlet, the first outlet is sequentially communicated with the conversion device and the inlet of the pump through a conveying pipeline, and the second outlet of the pump is respectively communicated with the inlet of the liquid nitrogen tank and the liquid nitrogen tank;
the liquid nitrogen tank is arranged in the thermostatic chamber.
9. The integrated stamping device of any one of claims 1-8,
and a second blank transfer device and a third blank transfer device are respectively arranged on two sides of the heating furnace.
10. The integrated stamping device of any one of claims 1-8, wherein the lifting mechanism comprises:
the shell is arranged in the liquid nitrogen quenching device;
the hydraulic cylinder is arranged in the shell, and the telescopic part of the hydraulic cylinder penetrates out of the shell and is connected with the bottom of the stamping die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921146744.9U CN210847928U (en) | 2019-07-19 | 2019-07-19 | Integrated stamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921146744.9U CN210847928U (en) | 2019-07-19 | 2019-07-19 | Integrated stamping device |
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| CN210847928U true CN210847928U (en) | 2020-06-26 |
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| CN201921146744.9U Active CN210847928U (en) | 2019-07-19 | 2019-07-19 | Integrated stamping device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415408A (en) * | 2022-09-05 | 2022-12-02 | 江苏东方瑞吉能源装备有限公司 | Connecting pipe cover plate pressing die, production method thereof and liner pipe cover plate forming method |
-
2019
- 2019-07-19 CN CN201921146744.9U patent/CN210847928U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415408A (en) * | 2022-09-05 | 2022-12-02 | 江苏东方瑞吉能源装备有限公司 | Connecting pipe cover plate pressing die, production method thereof and liner pipe cover plate forming method |
| CN115415408B (en) * | 2022-09-05 | 2023-09-26 | 江苏东方瑞吉能源装备有限公司 | Pipe connecting cover plate pressing die, production method thereof and liner pipe cover plate forming method |
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