CN112658115A - Forming method of upper cover of battery box - Google Patents
Forming method of upper cover of battery box Download PDFInfo
- Publication number
- CN112658115A CN112658115A CN202011409188.7A CN202011409188A CN112658115A CN 112658115 A CN112658115 A CN 112658115A CN 202011409188 A CN202011409188 A CN 202011409188A CN 112658115 A CN112658115 A CN 112658115A
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- Prior art keywords
- forming
- relief valve
- mounting surface
- upper cover
- mounting hole
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- Sealing Battery Cases Or Jackets (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a forming method of an upper cover of a battery box, which is characterized by comprising the following steps of: 1) drawing a first formed part on a plate for the first time, wherein the first formed part is provided with a convex hull for installing a pressure release valve; 2) drawing a second molded part for the first time, wherein the second molded part is provided with a sealant mounting surface with a mounting hole; 3) trimming the second piece, and roughly punching a mounting hole of the pressure relief valve on the mounting surface of the pressure relief valve; 4) the second flanging is matched, and the pressure relief valve mounting hole is finely punched; 5) punching other holes, shaping and finally forming the upper cover of the battery box. The battery box upper cover processing method is used for solving the problems that wrinkling, cracking and rebound are easy to occur in the battery box upper cover processing process in the prior art, and the size matching is unqualified.
Description
Technical Field
The invention relates to the field of battery box manufacturing, in particular to a battery box upper cover forming method.
Background
In the spare part of aluminium battery box assembly, the upper cover of battery case is one of them key part, and at present, the upper cover generally adopts aluminum alloy material, in order to satisfy the gas tightness of battery package, and is extremely high to the sealed face size requirement of the sealed matching of casing stamping workpiece and relief valve. In view of the problems of easy wrinkle and cracking, large resilience, difficult control and the like in the forming process of the aluminum plate material, how to obtain a high-quality product by a good process means is a challenge and a problem faced at present.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a method for forming a battery case top, which is used to solve the problems of the prior art that the battery case top is prone to wrinkle, crack, have large spring-back and have unqualified size matching during the process of processing.
In order to achieve the above and other related objects, the present invention provides a battery case upper cover molding method, comprising the steps of: 1) drawing a first formed part on a plate for the first time, wherein the first formed part is provided with a convex hull for installing a pressure release valve; 2) drawing a second molded part for the first time, wherein the second molded part is provided with a sealant mounting surface with a mounting hole; 3) trimming the second piece, and roughly punching a mounting hole of the pressure relief valve on the mounting surface of the pressure relief valve; 4) the second flanging is matched, and the pressure relief valve mounting hole is finely punched; 5) punching other holes, shaping and finally forming the upper cover of the battery box.
Preferably, in the step 1), the lower die used for the first drawing has two blank holders, including a first blank holder and a second blank holder, and a space between the first blank holder and the second blank holder is an area for forming the convex hull on the sheet material.
Preferably, the first and second blankholders are a unitary piece.
Preferably, in the step 2), a protrusion is arranged on a die for drawing and forming the second piece, corresponding to a corner region of the second piece.
Preferably, a corner draw bead is arranged on a die for drawing and molding the second piece.
Preferably, the sealant mounting surface on the second piece is shaped between the step 2) and the step 3).
Preferably, in the step 3), the pressure relief valve mounting hole is punched and formed by a wedge punch.
Preferably, in the step 4), a punch perpendicular to the punching surface is used for fine punching the relief valve mounting hole.
Preferably, the sealant installation surface and the pressure relief valve installation surface are shaped between the step 3) and the step 4).
As described above, the battery case upper cover forming method of the present invention has the following beneficial effects: the battery box cover is formed by the two-time drawing process method, so that the problem that the aluminum plate has large resilience after being formed is solved, the forming quality and the dimensional accuracy of parts are not influenced, and the requirements of the battery box such as air tightness are met.
Drawings
FIG. 1 is a schematic view showing a forming state of a sheet drawn for the first time in this embodiment.
Fig. 2 is a schematic view showing a forming state of the sheet material after the secondary drawing in this embodiment.
Fig. 3 is a schematic view showing a forming state of the trimmed board in this embodiment.
Fig. 4 is a schematic structural view of the upper cover of the battery box in this embodiment.
Description of the element reference numerals
1 convex hull
2 first pressing area
3 draw bead
4 second pressing area
5 projection
6 corner draw bead
7 sealant mounting surface
8 high-precision hole
9 relief valve installation face
10 scrap cutter
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
A method for forming an upper cover of a battery box, the specific structure of the upper cover of the battery box to be produced in the embodiment is shown in figure 4, the upper cover of the battery box is provided with a convex hull 1 and a sealant mounting surface 7, the convex hull 1 comprises a pressure release valve mounting surface 9, the pressure release valve mounting surface is provided with pressure release valve mounting holes, the sealant mounting surface 7 is provided with high-precision holes 8, and the method comprises the following steps:
1) drawing a first formed part on a plate (the plate in the embodiment is made of aluminum) for the first time, wherein the first formed part is provided with a convex hull 1 of a pressure release valve installation surface;
2) drawing a second molded part for the first time, wherein the second molded part is provided with a sealant mounting surface 7 with a mounting hole;
3) trimming the second piece, and roughly punching a mounting hole of the pressure relief valve on the mounting surface of the pressure relief valve;
4) the second flanging is matched, and the pressure relief valve mounting hole is finely punched;
5) punching other holes, shaping and finally forming the upper cover of the battery box.
The aluminum plate has low elongation relative to the steel plate, and has a smaller elastic modulus than the steel plate, so that the formability is poorer, the resilience amount after forming is large, and the forming quality and the dimensional accuracy of parts are seriously influenced.
Specifically, in this embodiment, as shown in fig. 1, a schematic view of a forming state of a sheet after the sheet is drawn for the first time, a lower die used for drawing for the first time is provided with two blank holders, which include a first blank holder and a second blank holder, the first blank holder corresponds to a first pressing area 2 on the sheet, the second blank holder corresponds to a second pressing area 4 on the sheet, and a space between the first blank holder and the second blank holder is an area where the convex hull 1 is formed on the sheet. And drawing the plate material by closing the upper die and the lower die, and processing a convex hull 1 with a pressure relief valve mounting surface, wherein the first blank holder and the second blank holder apply enough blank holding force on the plate material, so that the flow of the material can be controlled in the drawing process.
As a preferable scheme, the first blank holder and the second blank holder are of an integral structure, in the process of first blank holding, the integral structure carries out blank holding operation, after the first drawing is completed, the second blank holder becomes a part of a male die in a second drawing die, the position of the first blank holder is unchanged, and the second drawing is directly carried out. The first blank holder and the second blank holder are of an integral structure, so that the material flow is smooth, the wrinkling defect is effectively controlled, the thinning rate is relatively uniform, and a qualified drawing structure is obtained; in addition, because the first blank holder is arranged on the lower die, the shape of the process supplement can be reduced by the method, and the material utilization rate is improved.
As another preferable scheme, the dies used for two times of drawing are further provided with the draw beads 3, the flow of the material can be controlled by the arrangement of the draw beads 3, the problems of cracking and wrinkling of the material and the like are prevented, and the sectional size and the shape of the draw beads 3 are actually set according to the specific processing shape and the stress condition of the plate, so that the draw beads 3 can control the flow of the material in different directions, and the condition of cracking and wrinkling of the plate after drawing is further prevented.
As shown in fig. 2, which is a schematic view of a molding state after the secondary drawing, the upper and lower dies are closed to perform the secondary drawing, and a sealant mounting surface 7 of a mounting hole and other main structures are processed on a plate; because the first blank holder in the first drawing is utilized, enough blank holding force is applied to the sheet material, and the shape of the process supplement can be reduced by the method, so that the material utilization rate is improved.
Preferably, on a die for drawing and forming the second piece, a bulge 5 is arranged corresponding to a corner area of the second piece, and a corner part drawing rib 6 is arranged on the periphery of the second piece, wherein the bulge 5 ensures the sufficiency of sheet material extension, so that the resilience of the sheet material in the drawing process is reduced, and simultaneously the problems of wrinkling and cracking of the sheet material in the drawing process can be solved; in addition, the corner part drawing rib 6 plays a role in well controlling and adjusting the flow of the plate, and reduces the surface scratches of parts, so that a second part with high quality is obtained.
As a preferable scheme, a shaping process is added between the step 2) and the step 3), the sealant mounting surface 7 formed in the secondary drawing process is shaped, the sealant mounting surface 7 formed by secondary drawing is mainly shaped, the sealant is coated on the sealant mounting surface 7, the requirement on the flatness of the sealant mounting surface 7 is extremely high due to the extremely high air tightness requirement of the battery box, and shaping operation is required in the processing process to meet the mounting requirement. Meanwhile, since the high-precision hole 8 on the sealant mounting surface 7 has very high mounting and positioning requirements, it is necessary to improve the surface quality of the sealant mounting surface 7 through a precise shaping process.
Trimming the second piece in the step 3), and roughly punching and forming a pressure relief valve mounting hole on a pressure relief valve mounting surface; as shown in fig. 3, in the trimming process of the invention, the process supplement except the sealing of the whole piece is trimmed, in order to ensure that no scraps exist on the product flanging surface, a trimming waste material knife 10 is used for trimming all around, and the trimming is finished for one time without secondary knife connection; in addition, in the process of side punching in the step 3), a wedge punch is adopted to punch the mounting hole of the pressure relief valve.
Preferably, a shaping process is added after trimming in the step 3), the structure formed in the trimming and side punching process engineering is shaped, and the flatness of the pressure release valve mounting surface 9 and the sealant mounting surface 7 is improved.
In the step 4), flanging the second piece, and finely punching the pressure relief valve mounting hole; as shown in fig. 3, the flanging surface is ensured to be free of burrs in the flanging process, after the flanging is completed, the mounting hole of the relief valve is subjected to fine punching, and a punch perpendicular to the punching is adopted for processing.
In the step 5), punching other holes, shaping, punching high-precision holes 8 with high relative precision requirements on the periphery of the product, and punching in the same process to ensure the relative position precision of each high-precision hole 8; and (3) adding a shaping process after the step 5), shaping the structure formed in the hole punching process engineering, improving the flatness of the surface where the punched hole is located, and finally forming the upper cover of the battery box, as shown in fig. 4.
In conclusion, the forming method of the battery box upper cover disclosed by the invention has the advantages that the characteristics on the battery box cover are formed by a process method of drawing twice, so that the phenomenon that the rebound quantity of an aluminum plate is large after forming is avoided, the forming quality and the dimensional accuracy of parts are prevented from being influenced, and the requirements of the air tightness of the battery box and the like are met.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A forming method of an upper cover of a battery box is characterized by comprising the following steps:
1) drawing a first formed part on a plate for the first time, wherein the first formed part is provided with a convex hull (1) of a pressure release valve mounting surface (9);
2) drawing a second molded part for the first time, wherein the second molded part is provided with a sealant mounting surface (7) with a mounting hole;
3) trimming the second piece, and roughly punching a relief valve mounting hole on a relief valve mounting surface (9);
4) the second flanging is matched, and the pressure relief valve mounting hole is finely punched;
5) punching other holes, shaping and finally forming the upper cover of the battery box.
2. A method of forming a battery case lid according to claim 1, wherein: in the step 1), the lower die used for drawing for the first time is provided with two blank holders, the two blank holders comprise a first blank holder and a second blank holder, and the space between the first blank holder and the second blank holder is an area for forming the convex hull (1) on the plate.
3. A method of forming a battery case lid according to claim 2, wherein: the first blank holder and the second blank holder are an integral piece.
4. A method of forming a battery case lid according to claim 1, wherein: in the step 2), bulges (5) are arranged on the die for drawing and molding the second piece corresponding to the corner area of the second piece.
5. A battery case lid molding method according to claim 4, wherein: and corner part drawing beads (6) are arranged on a die for drawing and molding the second piece.
6. A method of forming a battery case lid according to claim 1, wherein: and shaping the sealant mounting surface (7) on the second part between the step 2) and the step 3).
7. A method of forming a battery case lid according to claim 1, wherein: and 3) stamping the pressure relief valve mounting hole by using a wedge punch.
8. A method of forming a battery case lid according to claim 1, wherein: and in the step 4), a punch perpendicular to the punching surface is adopted to precisely punch the pressure relief valve mounting hole.
9. A method of forming a battery case lid according to claim 1, wherein: and shaping the sealant mounting surface (7) and the pressure relief valve mounting surface between the step 3) and the step 4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409188.7A CN112658115A (en) | 2020-12-03 | 2020-12-03 | Forming method of upper cover of battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409188.7A CN112658115A (en) | 2020-12-03 | 2020-12-03 | Forming method of upper cover of battery box |
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| Publication Number | Publication Date |
|---|---|
| CN112658115A true CN112658115A (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409188.7A Pending CN112658115A (en) | 2020-12-03 | 2020-12-03 | Forming method of upper cover of battery box |
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| CN (1) | CN112658115A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414292A (en) * | 2021-08-24 | 2021-09-21 | 宁波明讯实业有限公司 | Stamping detection method for upper cover of new energy automobile battery pack |
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| CN106391857A (en) * | 2016-07-05 | 2017-02-15 | 上海众大汽车配件有限公司 | Die for part of automobile rear outside door panel reinforcing plate |
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| CN210208311U (en) * | 2019-05-30 | 2020-03-31 | 重庆骏翔机电技术有限责任公司 | Side wall planking extension board drawing die and automated production system |
| CN210333988U (en) * | 2019-05-30 | 2020-04-17 | 北京达峰成形科技有限公司 | Aluminum alloy battery case forming die and upper die thereof |
| CN111085628A (en) * | 2019-12-31 | 2020-05-01 | 天津市津兆机电开发有限公司 | Manufacturing method of upper cover product of hybrid electric vehicle integrated control system box |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391857A (en) * | 2016-07-05 | 2017-02-15 | 上海众大汽车配件有限公司 | Die for part of automobile rear outside door panel reinforcing plate |
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| CN210333988U (en) * | 2019-05-30 | 2020-04-17 | 北京达峰成形科技有限公司 | Aluminum alloy battery case forming die and upper die thereof |
| CN110756663A (en) * | 2019-11-01 | 2020-02-07 | 浙江舜仕汽车技术有限公司 | Forming process of front end plate of automobile battery box |
| CN111085628A (en) * | 2019-12-31 | 2020-05-01 | 天津市津兆机电开发有限公司 | Manufacturing method of upper cover product of hybrid electric vehicle integrated control system box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414292A (en) * | 2021-08-24 | 2021-09-21 | 宁波明讯实业有限公司 | Stamping detection method for upper cover of new energy automobile battery pack |
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Application publication date: 20210416 |