CN219522821U - Pit punching device - Google Patents
Pit punching device Download PDFInfo
- Publication number
- CN219522821U CN219522821U CN202320318538.1U CN202320318538U CN219522821U CN 219522821 U CN219522821 U CN 219522821U CN 202320318538 U CN202320318538 U CN 202320318538U CN 219522821 U CN219522821 U CN 219522821U
- Authority
- CN
- China
- Prior art keywords
- pressing
- forming
- die
- plastic film
- groove
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The utility model provides a pit punching device, which comprises a pre-pressing die and a forming die; the pre-pressing die comprises a pre-pressing male die and a pre-pressing female die which are arranged up and down, a first forming groove for forming the plastic film part in a punching mode is formed in the pre-pressing female die, and the pre-pressing male die can punch the plastic film part to form a pre-pressing groove; the forming die comprises a forming male die and a forming female die which are arranged up and down, a second forming groove for secondary stamping forming of the plastic film part is formed in the forming female die, the forming male die can secondarily stamp the plastic film part, the pre-pressing groove is stamped and enlarged to form a containing groove with a preset size, and the cross section outline size of the pre-pressing male die is larger than that of the forming male die. According to the pit punching device, the plastic film part is different in two punching positions in a secondary punching mode, is deformed step by step, is small in deformation and stress, and can be improved in safety, so that the safety and the service life of a battery are improved.
Description
Technical Field
The utility model relates to the technical field of battery manufacturing, in particular to a pit punching device.
Background
Currently, in the processing process of lithium ion soft package batteries, the aluminum plastic film needs to be punched to be processed into a proper size, and then the battery cells are put into the holes. The aluminum plastic film generally comprises a nylon layer, an aluminum layer and a PP layer, the aluminum layer is often excessively stretched in the pit punching process by the existing pit punching die structure, the problem that the aluminum layer is too thin or even breaks is caused, the design requirements of the safety, the service life and the like of the soft-packaged battery are difficult to meet, and the development and the design of the soft-packaged battery are influenced.
Disclosure of Invention
In view of the above, the present utility model is directed to a pit punching device for improving the safety of plastic film parts during punching.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
a pit punching device comprising:
the pre-pressing die comprises a pre-pressing male die and a pre-pressing female die which are arranged up and down, wherein a first forming groove for the stamping forming of the plastic film component is formed in the pre-pressing female die, and the pre-pressing male die can stamp the plastic film component to form a pre-pressing groove;
the forming die comprises a forming male die and a forming female die which are arranged up and down, wherein a second forming groove for secondary stamping forming of the plastic film component is formed in the forming female die, the forming male die can stamp the plastic film component for the second time, the pre-pressing groove is stamped and enlarged to form a containing groove with a preset size, and the cross section outline size of the pre-pressing male die is larger than that of the forming male die.
Further, the forming die comprises a pressing assembly for pressing the plastic film component, and the pressing assembly can be lifted and lowered along with the forming male die.
Further, the compacting component comprises positioning plates which are respectively arranged on two opposite sides of the forming female die, a pressing plate which is arranged on each positioning plate and used for compacting the plastic film component, and a driving part which is used for driving each positioning plate to move along with the forming male die, and the pre-pressing groove is arranged between the two positioning plates.
Further, a limiting end extending to one side of the forming female die is arranged on the pressing plate and used for being in butt fit with the forming female die to limit the displacement of the pressing plate.
Further, the horizontal distance between the limiting end and the first forming groove is not smaller than 0.
Further, the pre-pressing male die comprises a pre-pressing protruding block, the bottom of the pre-pressing protruding block is conical, an inclined portion which is formed by stamping the pre-pressing protruding block is formed between the bottom of the pre-pressing groove and the side wall of the pre-pressing groove, and the inclined portion is used for positioning and placing the plastic film component in the second forming groove.
Further, the pressing assembly comprises a pressure-bearing part which is arranged on the forming female die in a vertical sliding manner, and a pressing part which is arranged on the pressure-bearing part and is used for pressing the plastic film component, and an elastic piece is arranged between the pressure-bearing part and the forming female die; the edges of two opposite sides of the forming male die are provided with outward extending propping parts, and the pressing parts can push the pressure bearing parts to slide downwards during stamping of the forming male die.
Further, the pressure bearing part comprises pressure bearing plates which are arranged on two opposite sides of the second forming groove, and the two pressure bearing plates are arranged on the forming female die in a vertical sliding manner; the compressing part comprises two compressing plates, and the two compressing plates are arranged in one-to-one correspondence with the two bearing plates.
Further, the cross section size of the pressing plate is smaller than that of the bearing plate, and the pressing part is provided with a through hole for the pressing plate to pass through.
Further, the pre-pressing female die is provided with pre-pressing plates which are oppositely arranged at two sides of the first forming groove, and the pre-pressing plates are used for fixing the plastic film component on the pre-pressing female die.
Compared with the prior art, the utility model has the following advantages:
according to the pit punching device, the pre-pressing groove with larger area and shallower depth can be formed on the plastic film component through the pre-pressing die, then the pre-pressing groove is enlarged through secondary punching of the forming die to form the accommodating groove with the preset size, the plastic film component is small in depth during pre-pressing pit punching, so that deformation amount generated in the punching process of the plastic film component is small, generated stress is small, meanwhile, the cross section outline dimension of the pre-pressing male die is larger than that of the forming male die, the bottom area of the pre-pressing groove is mainly punched during secondary punching, namely the deformed area is respectively located around the groove bottom and the opening of the pre-pressing groove, the secondary punching positions are different, the plastic film component is deformed step by step, deformation amount and stress during secondary punching can be effectively reduced, the plastic film component is prevented from being damaged due to stretching and thinning at the same position, safety of the plastic film component can be improved, and the safety and service life of a battery can be prolonged.
In addition, the setting of compressing tightly the subassembly follow-up in shaping terrace die can be when shaping terrace die punching press pre-compaction groove for mould the peripheral part in pre-compaction groove of membrane part and can sink along with the pre-compaction groove to a certain extent, reduce the deformation volume and the stress of moulding the membrane part, avoid the deformation volume too big and impaired. Through setting up clamp plate and locating plate, can fix a position the position of pre-compaction groove when the secondary punching press to avoid moulding the membrane part skew, and set up the limit end, can avoid the secondary punching press in-process to press the subassembly to move down the volume too big, and make pre-compaction groove and mould the membrane part by compressing tightly the part between the region and excessively stretched, cause moulding the membrane part and impaired because of the reverse stretching. The horizontal distance between the limiting end and the first molding groove is not smaller than 0, so that the pressing plate can be prevented from interfering the stamping action of the molding male die.
In addition, through setting up the tilting part, can make the pre-compaction groove have a toper bottom after the pre-compaction, this toper bottom can carry out auxiliary positioning to moulding the membrane part to need not to attach positioner again when secondary punching press, save process and operating time. The elastic piece is arranged, so that the pressure bearing part can be reset conveniently after stamping is finished. Simultaneously, bearing plate, pressure strip and elastic component are two, can promote the effect of compressing tightly to moulding the membrane part, avoid the punching press in-process to mould the membrane part and take place horizontal migration and influence shaping effect, wherein, the cross section size of pressure strip is less than the cross section size of bearing plate, and the setting of through-hole can promote to support the thrust stability of pressure part to the bearing plate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of a pre-pressing mold according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the structure shown in FIG. 1 in a stamped state;
FIG. 3 is a schematic structural view of a molding die according to an embodiment of the utility model;
FIG. 4 is a schematic view of the structure shown in FIG. 3 in a stamped state;
FIG. 5 is a schematic view of a pre-pressing mold according to another embodiment of the present utility model;
FIG. 6 is a schematic view of the structure shown in FIG. 5 in a stamped state;
FIG. 7 is a schematic view of a molding die according to another embodiment of the utility model;
FIG. 8 is a schematic view of the structure shown in FIG. 7 in a stamped state;
reference numerals illustrate:
1. pre-pressing the male die; 2. a pre-pressing plate; 3. a plastic film component; 4. pre-pressing the female die; 5. forming a male die; 6. a pressing plate; 7. a positioning plate; 8. forming a female die; 9. a compacting plate; 10. a pressure bearing plate; 11. an elastic member;
401. a first molding groove; 801. and a second molding groove.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment relates to a pit punching device, which can enable a plastic film component 3 to deform step by step in a secondary punching mode to form a final required accommodating groove, has small deformation quantity and stress, can effectively avoid the breakage of an aluminum layer of the plastic film component 3 due to stretching thinning at the same position, and can improve the safety of the plastic film component 3.
In the overall structure, as shown in fig. 1 to 8, the pit punching device of the present embodiment includes a pre-pressing mold and a forming mold. The prepressing die comprises a prepressing male die 1 and a prepressing female die 4 which are arranged up and down, a first forming groove 401 for forming the plastic film part 3 in a punching mode is formed in the prepressing female die 4, and the prepressing male die 1 can punch the plastic film part 3 to form a prepressing groove.
The forming die comprises a forming male die 5 and a forming female die 8 which are arranged up and down, a second forming groove 801 for carrying out secondary stamping forming on the plastic film part 3 is formed in the forming female die 8, the forming male die 5 can carry out secondary stamping on the plastic film part 3, a pre-pressing groove is stamped and enlarged to form a containing groove with a preset size, and the cross section outline size of the pre-pressing male die 1 is larger than that of the forming male die 5.
It should be mentioned that the plastic film component 3 in this embodiment generally refers to an aluminum plastic film for producing a lithium ion soft package battery, and each structure of the pre-pressing mold and the forming mold in this embodiment, which are not mentioned, can refer to the related structural parts of the pit punching mold device commonly used in the prior art, and will not be described herein.
As will be understood, in this embodiment, the accommodating groove is formed by progressive stamping deformation, and the primary stamping area during secondary stamping is smaller than the pre-pressing area, that is, the positions of the plastic film component 3 where secondary deformation occurs are not completely the same, so that the deformation amount and stress during secondary stamping can be effectively reduced, and the situation that the aluminum layer of the plastic film component 3 is damaged due to stretch-thinning at the same position is avoided, thereby improving the safety of the plastic film component 3.
Meanwhile, in practical application, the number of times of pre-pressing and stamping can be one time or multiple times in consideration of the safety of the plastic film component 3, and when the pre-pressing and stamping is multiple times, a progressive stamping mode can be adopted to reduce deformation and stress of each stamping, namely the area of the next stage stamping is smaller than that of the area of the previous stage stamping, so that the damage to the aluminum layer of the plastic film component 3 caused by repeated stamping at the same position is avoided.
Based on the above overall description, in this embodiment, as a preferred embodiment, the molding mold includes a pressing component for pressing the plastic film component 3, where the pressing component can be lifted by the molding punch 5, so that when the molding punch 5 punches the pre-pressing groove, the peripheral portion of the plastic film component 3 located in the pre-pressing groove can sink along with the pre-pressing groove to a certain extent, so as to reduce the deformation and stress of the plastic film component 3, and avoid damage caused by overlarge deformation.
In addition, in this embodiment, as a preferred exemplary structure, as shown in fig. 3 and 4, the pressing assembly includes positioning plates 7 disposed on opposite sides of the molding female die 8, pressing plates 6 disposed on the respective positioning plates 7 for pressing the plastic film member 3, and a driving part for driving the respective positioning plates 7 to move following the molding male die 5, and the pre-pressing groove is located between the two positioning plates 7.
It can be understood that the positioning of the plastic film component 3 is mainly realized by sandwiching the pre-pressing groove of the plastic film component 3 between two positioning plates 7. Meanwhile, since the cross-sectional profile of the pre-pressing punch 1 is larger than that of the forming punch 5, the cross-sectional profile of the forming die 8 is also smaller than that of the pre-pressing groove, and as shown in fig. 3 and 4, a similar step structure is formed between the positioning plate 7 and the forming die 8, just can be used for positioning and placing the pre-pressing groove, thereby ensuring the positioning and placing of the plastic film part 3 before secondary punching, and ensuring the positioning of the plastic film part 3 during secondary punching through the pressing plate 6.
In this embodiment, in order to avoid overstretching the plastic film component 3, as a preferred embodiment, the pressing plate 6 is provided with a limiting end extending to one side of the molding die 8, and the limiting end is used to be in abutting engagement with the molding die 8 to limit the displacement of the pressing plate 6, so as to avoid excessive downward displacement of the pressing assembly in the secondary stamping process, and thus the portion between the pre-pressing groove and the pressed region of the plastic film component 3 is overstretched, which causes damage to the plastic film component 3 due to reverse stretching.
In a preferred arrangement, in a specific structure, the horizontal distance between the limiting end and the first molding groove is not less than 0, so as to avoid interference of the pressing plate 6 with the stamping action of the molding male die 5.
The pit punching device for the plastic film component 3 in the preferred example is specifically shown in fig. 1 to 4, firstly, the plastic film component 3 is pressed by a pressing plate 6 in a pre-pressing die, then the plastic film component 3 is pressed into a pre-pressing female die 4 by downward movement of a pre-pressing male die 1 to form a pre-pressing groove with larger area and shallower depth, and then the pre-pressing groove is placed in a forming die, and the plastic film component 3 is controlled by a positioning plate 7 and the pressing plate 6;
then the molding punch 5 moves downwards until contacting the plastic film part 3, the pressing plate 6 and the positioning plate 7 also move downwards at the same speed as the molding punch 5, when the positioning plate 7 and the female die are positioned at the same horizontal plane, the pressing plate 6 and the positioning plate 7 stop moving, the molding punch 5 continues to move downwards until reaching the required depth, at the moment, the bottom area of the plastic film part 3 becomes smaller, and the depth becomes larger, so that the required depth is reached. Because the pit punching depth of the plastic film part 3 is not large every time, and the deformation of the plastic film part 3 is small, the damage of the aluminum layer at the same position due to overlarge thinning and stretching can be effectively avoided, and the safety of the battery is further ensured.
In addition, as another preferable exemplary structure, as shown in fig. 5 and 6, the pre-pressing punch 1 of the present embodiment includes a pre-pressing protrusion, and the bottom of the pre-pressing protrusion is tapered, and an inclined portion formed by punching the pre-pressing protrusion is formed between the bottom of the pre-pressing groove and the sidewall, and is used for positioning the plastic film component 3 in the second forming groove 801.
Therefore, the pre-pressing groove can be provided with a conical bottom after pre-pressing, the conical bottom can assist in positioning the plastic film component 3, and a positioning device is not required to be additionally arranged during secondary punching, so that the working procedures and the operation time are saved.
In particular, in the present exemplary structure, as a preferred embodiment, as shown in fig. 7 and 8, the pressing assembly includes a pressing portion provided on the molding die 8 to slide up and down, and a pressing portion provided on the pressing portion for pressing the plastic film member 3, and an elastic member 11 is provided between the pressing portion and the molding die 8. The edges of the two opposite sides of the forming male die 5 are provided with pressing parts which extend outwards, and the pressing parts can be pressed by the pressing parts to slide downwards when the forming male die 5 is stamped.
Here, the setting of elastic component 11 can be convenient for press the back of back pressure-bearing portion after the punching press, and when implementing, elastic component 11 adopts ordinary spring product alright.
In this embodiment, considering the molding effect of the plastic film member 3 during the punching process, as a preferable arrangement, the pressure-receiving portion includes pressure-receiving plates 10 provided on opposite sides of the second molding groove 801, and both of the pressure-receiving plates 10 are provided on the molding die 8 so as to slide up and down. Meanwhile, the pressing part comprises two pressing plates 9, and the two pressing plates 9 and the two bearing plates 10 are arranged in one-to-one correspondence. Therefore, the pressing effect on the plastic film component 3 can be improved, and the plastic film component 3 is prevented from horizontal deviation in the stamping process to influence the forming effect.
In a specific arrangement, in a preferred embodiment, the cross-sectional dimension of the pressing plate 9 is smaller than that of the bearing plate 10, and the pressing portion is provided with a through hole for the pressing plate 9 to pass through, so as to improve the pushing stability of the pressing portion to the bearing plate 10.
In this exemplary structure, the plastic film component 3 can be fixed by the force applied by the pressure bearing plate 10, the pressing plate 9 and the elastic element 11 during final molding, then the molding male die 5 moves downwards to perform secondary stamping on the plastic film component 3, and finally the molding male die 5, the pressure bearing plate 10 and the elastic element 11 apply force to form a blank holder for the plastic film component 3, so that the bottom area can be gradually reduced by controlling the shape and the size of the die, the stamping depth is increased, and the design requirement is met.
In addition, in this embodiment, as a preferred embodiment, as shown in fig. 1 and 5, the pre-pressing die 4 is provided with pre-pressing plates 2 disposed opposite to both sides of the first molding groove 401, and the pre-pressing plates 2 are used to fix the plastic film component 3 on the pre-pressing die 4 to improve pre-pressing stability.
The pit punching device of the embodiment can firstly form a pre-pressing groove with larger area and shallower depth on the plastic film component 3 through a pre-pressing die, then enlarge the pre-pressing groove through secondary punching of a forming die to form a containing groove with a preset size, and the plastic film component 3 has smaller deformation amount and smaller stress in the punching process due to the small depth of the plastic film component 3 during pre-pressing pit punching;
meanwhile, based on the fact that the cross section outline dimension of the pre-pressing male die 1 is larger than that of the forming male die 5, the bottom area of the pre-pressing groove is mainly stamped during secondary stamping, namely the area where deformation occurs is located around the groove bottom of the pre-pressing groove and the opening of the pre-pressing groove respectively, so that the secondary stamping positions are different, the plastic film part 3 deforms step by step, deformation and stress during secondary stamping can be effectively reduced, the plastic film part 3 is prevented from being damaged due to stretching and thinning at the same position, the safety of the plastic film part 3 can be improved, and the safety and service life of a battery are prolonged.
And moreover, a progressive stamping mode is adopted, compared with a mode of directly stamping at the same position in the prior art, the limitation of pit stamping depth can be relieved, a product with larger depth is manufactured, and the development and design of the soft-package battery are facilitated.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A pit punching device, characterized by comprising:
the pre-pressing die comprises a pre-pressing male die and a pre-pressing female die which are arranged up and down, wherein a first forming groove for the stamping forming of the plastic film component is formed in the pre-pressing female die, and the pre-pressing male die can stamp the plastic film component to form a pre-pressing groove;
the forming die comprises a forming male die and a forming female die which are arranged up and down, wherein a second forming groove for secondary stamping forming of the plastic film component is formed in the forming female die, the forming male die can stamp the plastic film component for the second time, the pre-pressing groove is stamped and enlarged to form a containing groove with a preset size, and the cross section outline size of the pre-pressing male die is larger than that of the forming male die.
2. The pit punching device according to claim 1, characterized in that:
the forming die comprises a pressing component for pressing the plastic film component, and the pressing component can be lifted along with the forming male die.
3. The pit punching device according to claim 2, characterized in that:
the pressing assembly comprises positioning plates which are respectively arranged on two opposite sides of the forming female die, pressing plates which are arranged on the positioning plates and used for pressing the plastic film component, and driving parts which are used for driving the positioning plates to move along with the forming male die, and the pre-pressing groove is arranged between the two positioning plates.
4. A pit punching device according to claim 3, characterized in that:
the pressing plate is provided with a limiting end extending to one side of the forming female die, and the limiting end is used for being in butt fit with the forming female die to limit the displacement of the pressing plate.
5. The pit punching device according to claim 4, characterized in that:
the horizontal distance between the limiting end and the first forming groove is not smaller than 0.
6. The pit punching device according to claim 2, characterized in that:
the pre-pressing male die comprises a pre-pressing protruding block, the bottom of the pre-pressing protruding block is conical, an inclined portion which is formed by stamping the pre-pressing protruding block is formed between the bottom of the pre-pressing groove and the side wall of the pre-pressing groove, and the inclined portion is used for positioning and placing the plastic film component in the second forming groove.
7. The pit punching device according to claim 6, characterized in that:
the compression assembly comprises a pressure-bearing part which is arranged on the forming female die in a vertical sliding manner, a compression part which is arranged on the pressure-bearing part and is used for compressing the plastic film component, and an elastic piece is arranged between the pressure-bearing part and the forming female die;
the edges of two opposite sides of the forming male die are provided with outward extending propping parts, and the pressing parts can push the pressure bearing parts to slide downwards during stamping of the forming male die.
8. The pit punching device according to claim 7, characterized in that:
the pressure bearing part comprises pressure bearing plates which are arranged on two opposite sides of the second forming groove, and the two pressure bearing plates are arranged on the forming female die in a vertical sliding manner;
the compressing part comprises two compressing plates, and the two compressing plates are arranged in one-to-one correspondence with the two bearing plates.
9. The pit punching device according to claim 8, characterized in that:
the cross section size of the pressing plate is smaller than that of the bearing plate, and the pressing part is provided with a through hole for the pressing plate to pass through.
10. Pit flushing device according to any one of claims 1 to 9, characterized in that:
the pre-pressing female die is provided with pre-pressing plates which are oppositely arranged at two sides of the first forming groove, and the pre-pressing plates are used for fixing the plastic film component on the pre-pressing female die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320318538.1U CN219522821U (en) | 2023-02-22 | 2023-02-22 | Pit punching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320318538.1U CN219522821U (en) | 2023-02-22 | 2023-02-22 | Pit punching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219522821U true CN219522821U (en) | 2023-08-15 |
Family
ID=87651043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320318538.1U Active CN219522821U (en) | 2023-02-22 | 2023-02-22 | Pit punching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219522821U (en) |
-
2023
- 2023-02-22 CN CN202320318538.1U patent/CN219522821U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109967604B (en) | Stamping compound die for forming automobile sheet metal part and forming method | |
| CN105945149A (en) | Stamping die for U-shaped plates | |
| CN219522821U (en) | Pit punching device | |
| CN113799376A (en) | Pit punching die structure, aluminum plastic film pit punching method and battery | |
| CN213256643U (en) | Stamping die who buckles punches a hole step by step | |
| CN109454167B (en) | Single-step forming die for integral wave-shaped sheet of clutch | |
| CN115411467A (en) | Manufacturing method of riveted pole and battery top cover assembly | |
| CN212857395U (en) | Support production frock for car | |
| JP5093131B2 (en) | Manufacturing method of rivet terminal | |
| CN113198914A (en) | Stamping method for part with negative angle and flanging negative angle integrated forming die | |
| CN217831515U (en) | Synchronous piercing and bending die structure | |
| CN212190897U (en) | Forming, trimming and punching compound die | |
| CN112338024B (en) | Flanging process and pre-flanging device | |
| CN114733972B (en) | Processing method and processing die for supporting plate of high-fitting handrail frame body of automobile | |
| CN215614414U (en) | Substep stamping die of automobile framework pipe | |
| CN217021412U (en) | Pit punching die structure and battery | |
| CN220144541U (en) | Grille hydraulic forming die | |
| CN211464547U (en) | Side column, forming die and railway vehicle with side column | |
| CN217990625U (en) | Continuous stamping die of breach packing ring | |
| CN210907672U (en) | Top cover cutting, flanging and shaping composite die | |
| CN219541476U (en) | Continuous stamping die of gasket | |
| CN214977189U (en) | Automatic ejection of compact type U spring forming die | |
| CN216828249U (en) | Appearance and hole chamfer mould simultaneously | |
| CN212634027U (en) | Display screen backplate forming die | |
| CN212242236U (en) | Aluminum-plastic film pit punching device of long ternary lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |