CN111283076A - Forming die of shell on automobile battery box - Google Patents
Forming die of shell on automobile battery box Download PDFInfo
- Publication number
- CN111283076A CN111283076A CN201811501752.0A CN201811501752A CN111283076A CN 111283076 A CN111283076 A CN 111283076A CN 201811501752 A CN201811501752 A CN 201811501752A CN 111283076 A CN111283076 A CN 111283076A
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- die
- shaping
- die assembly
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- cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a forming die of an upper shell of an automobile battery box, wherein a first drawing die component for drawing a section I with the maximum height part on the upper shell of the automobile battery box for the first time, a second drawing die component for integrally forming the upper shell of the automobile battery box for the second time and a shaping die component for carrying out arc transition shaping on corners of a formed product are sequentially arranged between the upper die component and the lower die component, wherein a first upper die of the first drawing die component, a second upper die of the second drawing die component and an upper shaping die of the shaping die component are connected to the upper die component, and a first lower die of the first drawing die component, a second lower die of the second drawing die component and a lower shaping die of the shaping die component are connected to the lower die component. Therefore, the production efficiency is greatly improved, the production cost is saved, the welding defect is avoided, and the risk of airtight leakage is also avoided.
Description
Technical Field
The invention relates to the technical field of dies, in particular to an integrated forming die for an upper shell of an automobile battery box.
Background
At present, as people's environmental awareness is getting stronger, more and more people select the electric automobile of new forms of energy as the instrument of riding instead of walk, and the battery case is as the important part among the electric automobile, and it is the load-bearing body of group battery, and it must have sufficient intensity to fix the group battery, and must possess effects such as dustproof, pleasing to the eye moreover. Generally, a battery cartridge includes an upper case and a lower case fixedly coupled to each other.
The upper casing of the battery box of the vehicle as shown in the attached fig. 1 and 2 can be divided into a three-section structure, namely a section I1-1, a section II 1-2 and a section III 1-3, wherein the highest position of the product of the section I1-1 can reach 304.7 mm, the height difference of the first step at the joint of the section II 1-2 and the section I1-1 can reach 150 mm, the height difference of the second step of the product at the leftmost end part of the section I1-1 is 76 mm, the height difference of the third step at the joint of the section II 1-2 and the section III 1-3 is 39 mm, the height of the shallowest position of the section III 1-3 is only 111.7 mm, the joint of the section III 1-3 and the section II 1-2 is provided with a right-angle corner 1-4 in the horizontal direction, and the material thickness of the whole product is only 0.8 mm. As can be seen from the above description, the structure of the case on the battery case is very complicated, and is a thin-walled irregularly shaped case member.
In the prior art, the above-mentioned processing technology of the thin-wall irregular shell part is generally to divide the thin-wall irregular shell part into two or more sections from the length direction, and after each section is formed by stretching, the sections are welded and combined into a whole. Therefore, it has the disadvantages: on one hand, each segmented part needs to be provided with a stretching die, so that the number of the dies is large, and the manufacturing cost is high; on the other hand, each segment part has a stretching allowance during stretching, so that the used materials are excessively wasted, the utilization rate of the materials is too low, and the production cost is further increased; on the other hand, welding defects are easily generated during welding, for example, welding seams are not neat or the air tightness is insufficient, so that the air tightness of the battery box is reduced, and gas or liquid enters the battery box through the air holes to further influence the normal operation of the battery.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the forming die of the upper shell of the automobile battery box, which is integrally formed, can save materials, reduce the manufacturing cost and eliminate pores on the surface of a product, thereby improving the quality of the product.
In order to solve the technical problem, the forming die for the upper shell of the automobile battery box comprises an upper die assembly and a lower die assembly, wherein a first drawing die assembly, a second drawing die assembly and a shaping die assembly are sequentially arranged between the upper die assembly and the lower die assembly, a first upper die of the first drawing die assembly, a second upper die of the second drawing die assembly and a shaping upper die of the shaping die assembly are connected onto the upper die assembly, and a first lower die of the first drawing die assembly, a second lower die of the second drawing die assembly and a shaping lower die of the shaping die assembly are connected onto the lower die assembly; the first stretching die assembly is used for stretching a first section with the maximum height part on the upper shell of the automobile battery box for the first time, the second stretching die assembly is used for stretching the upper shell of the automobile battery box for the second time in the integral forming process, and the shaping die assembly is used for shaping the corners of a formed product in an arc transition mode.
The first upper die and the first lower die of the first stretching die assembly form a first initial cavity of an upper shell section of the automobile battery box after die assembly, a convex hull cavity higher than the product size is arranged at the highest position of the right side of the initial cavity, the corresponding first upper die is higher than the final forming size of the product in the inner concave cavity of the convex hull cavity in size, the width size is larger than the final forming size of the product, the bottom of the inner concave cavity in the position is excessive in arc shape, and the opening of the inner concave cavity is excessive in arc shape.
The protruding height of the convex hull cavity is eliminated to the size after molding under the molding of the subsequent second stretching die assembly, and the material in the convex hull cavity is supplemented to the vertical step surface of the first step at the joint between the first section and the second section of the upper shell of the automobile battery box.
A second upper die and a second lower die of the second stretching die assembly are assembled to form an integral cavity of an upper shell of the automobile battery box, the upper die of the integral cavity at the vertical step surface of a first step at the joint between the first section and the second section is provided with a stretching wrinkle absorption rib protruding outwards, and the stretching wrinkle absorption rib extends along the length direction of the product and extends from the vertical step surface to the top surface of the second section; and the corresponding position of the second lower die and the second upper die is provided with a concave stretching wrinkle absorption groove matched with the stretching wrinkle absorption rib.
The two stretching wrinkle-absorbing ribs are respectively close to the two side edges of the product.
A second upper die and a second lower die of the second drawing die assembly are assembled to form an integral cavity of the upper shell of the automobile battery box, and the integral cavity is provided with a right-angle corner at the joint between the second section and the third section of the product; the second drawing die assembly at the right-angle corner is provided with a material pressing plate and a blank holder, the blank holder is connected to the second lower die, and the material pressing plate is connected to the second upper die; the pressing plate is characterized in that one surface of the pressing plate facing the blank holder is provided with a convex surface, one part of edge of the convex surface close to the whole cavity forms the shape of the bottom edge of a right-angle corner of the product cavity, and the blank holder is provided with a groove matched with the rest part of the convex surface of the pressing plate.
The groove wall of the groove on the blank holder is in arc transition, and the groove bottom is a through hole penetrating the thickness of the blank holder.
The shaping lower die of the shaping die assembly is provided with a reverse ridge strip at the bottom edge of a right-angle corner where a product section II and a section III are connected, the arc of the edge degree edge of the shaping upper die at the position, close to the section III, of the product section II is flatter than the arc of the transition edge of a final product, the section III is provided with a shaping and wrinkle absorbing rib protruding outwards and close to the right-angle corner, the shaping and wrinkle absorbing rib is arc-shaped along the edge of the right-angle corner, and a shaping and wrinkle absorbing groove is formed in the matching position of the shaping and wrinkle absorbing rib of the corresponding shaping lower die.
After the forming die is adopted, compared with the prior art, the forming die has the following advantages:
1) because the upper shell of the automobile battery box is integrally formed, the forming process is greatly reduced, and the processes of welding, air tightness detection and the like are also reduced, so that on one hand, the production efficiency is greatly improved; on the other hand, the method reduces a plurality of moulds, and greatly saves the production cost after the detection cost required by air tightness detection is carried out; on the other hand, the waste of materials is avoided to a greater extent, so that the production cost is further saved; on the other hand, the formed automobile battery box upper shell is better in integrity, welding defects are avoided, and the risk of airtight leakage is also avoided.
2) After the first stretching and forming of the first stretching die assembly, the convex hull at the highest position of the first product section is a cracking phenomenon generated after the second stretching because enough material is not available on the vertical step surface of the joint between the integrally formed first section and the second section, and in order to eliminate the cracking phenomenon at the joint step surface, the excessive convex hull after the first stretching stores the material to be drawn during the second stretching, so that the position easy to crack timely supplements the excessive material at the positions after the second stretching, and the cracking phenomenon is eliminated.
3) The upper die of the second drawing die assembly is provided with the wrinkle absorbing ribs at the joint of the first product section and the second product section, which is caused by a plurality of transverse materials after the joint is stretched, heightened and widened once, but the heightening and widening are requirements for solving the cracking phenomenon, and the two requirements are contradictory, so in order to solve the contradiction, the excessive materials are consumed, the wrinkle absorbing ribs are arranged on the upper die, and the corresponding lower die is provided with the wrinkle absorbing grooves, so that the wrinkling phenomenon is eliminated.
4) The biggest problem of the product is that the drawing depth of the right-angle corner at the joint of the second section and the third section can reach 111.7 mm, and the right-angle corner is very serious in material shortage during forming, so that the mould is provided with the blank holder and the pressure plate, the blank holder is provided with a groove at the position corresponding to the material shortage of the corner, and before drawing, when the pressure plate presses materials, a part of materials are predicted to have a cracking area, so that the materials can be supplemented to a cracking position during drawing, and the cracking phenomenon of the bottom edge of the corner is eliminated.
5) The shaping die is provided with the reverse ridge strip at the bottom edge of the right-angle corner, because a part of material is stored at the step corner at the joint of the second section and the third section when drawing is started, the problem of excessive material is aggravated, and material stacking is formed, so that the reverse ridge strip is arranged on the lower die of the shaping die, the material is prevented from extending outwards firstly, and the excessive material is pulled upwards through the shaping die, so that the edge of the second section, which is close to the third section, excessively meets the requirement of a final product; in addition, the arrangement of the arc-shaped wrinkle absorption ribs on the third section further absorbs redundant materials, so that the surface of the product can meet the quality requirement.
Drawings
Fig. 1 is a schematic view of the structure of the components of the upper case of the battery pack for an automobile according to the present invention.
Fig. 2 is a schematic view of the structure of the components of the upper case of the battery pack for an automobile according to the present invention.
Fig. 3 is a schematic structural view of a first drawing die assembly in a forming die for an upper case of a battery pack for an automobile according to the present invention.
Fig. 4 is a schematic cross-sectional view of a first drawing die assembly according to the present invention.
Fig. 5 is a schematic structural view of a second drawing die assembly in a forming die for an upper case of a battery pack for an automobile according to the present invention.
Fig. 6 is a schematic view of the structure of the lower die assembly of the second drawing die assembly of the present invention.
Fig. 7 is a schematic view of the upper die assembly of the second drawing die assembly of the present invention.
Fig. 8 is a schematic cross-sectional view of a second drawing die assembly according to the present invention.
Fig. 9 is a schematic view of the configuration of the nip plate of the second drawing die assembly of the present invention.
FIG. 10 is a schematic view of the construction of a binder ring of the second drawing die assembly of the present invention.
Fig. 11 is a schematic structural view of a shaping mold assembly in a molding mold for an upper case of a battery pack for an automobile according to the present invention.
Fig. 12 is a schematic view of a square corner configuration of a reforming mold assembly according to the present invention.
Wherein: 1. an automobile battery box upper shell; 1-1, segment one; 1-2, section two; 1-3, section three, 1-4, right angle corner; 2. a first drawing die assembly; 2-1, a first upper die; 2-2, a first lower die; 2-3, plates; 2-4, convex bag cavity; 3. a second drawing die assembly; 3-1, a second upper die; 3-2, a second lower die; 3-3, stretching a wrinkle absorbing groove; 3-4, pressing a material plate; 3-5, blank holder; 3-6, stretching the wrinkle absorbing strips; 3-7, convex surface; 3-8, a groove; 3-9, through holes; 4. a shaping mold assembly; 4-1, shaping an upper die; 4-2, shaping the lower die; 4-3, reverse ridge strips.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As can be seen from the structural schematic diagrams of the forming mold for the upper shell of the automobile battery box shown in fig. 1 to 12, the forming mold comprises an upper mold component and a lower mold component, wherein a first drawing mold component 2, a second drawing mold component 3 and a shaping mold component 4 are sequentially arranged between the upper mold component and the lower mold component, wherein a first upper mold 2-1 of the first drawing mold component 2, a second upper mold 3-1 of the second drawing mold component 3 and a shaping upper mold 4-1 of the shaping mold component 4 are all connected to the upper mold component, and a first lower mold 2-2 of the first drawing mold component 2, a second lower mold 3-2 of the second drawing mold component 3 and a shaping lower mold 4-2 of the shaping mold component 4 are all connected to the lower mold component; the first drawing die assembly 2 is used for drawing a section I1-1 with the maximum height part on the upper shell 1 of the automobile battery box for the first time, the second drawing die assembly 3 is used for drawing the upper shell 1 of the automobile battery box for the second time in the integral forming process, and the shaping die assembly 4 is used for carrying out arc transition shaping on corners of a formed product.
The first upper die 2-1 and the first lower die 2-2 of the first stretching die component 2 are matched to form a primary cavity of a first section 1-1 of a shell on a battery box of an automobile after being matched, the highest position on the right side of the primary cavity is provided with a convex hull cavity 2-4 higher than the size of a product, the height size of the corresponding first upper die in an inner cavity of the convex hull cavity 2-4 is larger than the final forming size of the product, the width size of the corresponding first upper die is larger than the final forming size of the product, the bottom of the inner cavity is in arc transition, and the opening of the inner cavity is in arc transition.
The protruding height of the convex hull cavity 2-4 is eliminated to the size after molding under the molding of the subsequent second drawing die assembly 3, and the material in the convex hull cavity 2-4 is supplemented to the vertical step surface of the first step at the joint between the first section 1-1 and the second section 1-2 of the upper shell 1 of the automobile battery box.
A second upper die 3-1 and a second lower die 3-2 of the second drawing die assembly 3 are matched to form an integral cavity of the upper shell 1 of the automobile battery box, the upper die of the integral cavity at the vertical step surface of the first step at the joint between the first section 1-1 and the second section 1-2 of the product is provided with a drawing wrinkle absorption rib 3-6 protruding outwards, and the drawing wrinkle absorption rib 3-6 extends along the length direction of the product and extends from the vertical step surface to the top surface of the second section 1-2; the corresponding position of the second lower die 3-2 and the second upper die 3-1 is provided with a concave stretching wrinkle absorption groove 3-3 matched with the stretching wrinkle absorption rib 3-6.
The two stretching wrinkle-absorbing ribs 3-6 are respectively close to the two side edges of the product.
A second upper die 3-1 and a second lower die 3-2 of the second drawing die assembly 3 are assembled to form an integral cavity of the upper shell 1 of the automobile battery box, and the integral cavity is provided with a right-angle corner 1-4 at the joint between the second section 1-2 and the third section of the product; the second drawing die component 3 at the right-angle corner 1-4 is provided with a material pressing plate 3-4 and a blank holder 3-5, the blank holder 3-5 is connected to the second lower die 3-2, and the material pressing plate 3-4 is connected to the second upper die 3-1; and one surface of the pressure plate 3-4 facing the blank holder 3-5 is provided with a convex surface 3-7, a part of edge of the convex surface 3-7 close to the whole cavity forms the shape of the bottom edge of a right-angled corner 1-4 of the product cavity, and the blank holder 3-5 is provided with a groove 3-8 matched with the rest part of the convex surface 3-7 of the pressure plate 3-4.
The groove wall of the groove 3-8 on the blank holder 3-5 is in arc transition, and the groove bottom is provided with a through hole 3-9 penetrating the thickness of the blank holder 3-5.
The bottom edge of a right-angle corner 1-4 where a product section II 1-2 and a section III 1-3 are connected is provided with a reverse ridge strip 4-3 by a lower shaping die 4-2 of the shaping die component 4, the arc of the edge of the shaping upper die 4-1 at the position, close to the section III 1-3, of the product section II 1-2 is flatter than the arc of the transition edge of a final product, an outward convex shaping wrinkle absorbing rib is arranged at the position, close to the right-angle corner 1-4, of the section III 1-3, the shaping wrinkle absorbing rib is arc-shaped along the edge of the right-angle corner 1-4, and a shaping wrinkle absorbing groove is arranged at the matching position of the shaping wrinkle absorbing rib by the corresponding lower shaping die 4-2.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the scope of the present invention is limited thereby, and it should be understood by those skilled in the art that various other modifications and equivalent arrangements can be made by applying the technical solutions and concepts of the present invention within the scope of the present invention as defined in the appended claims.
Claims (8)
1. The utility model provides a forming die of casing on car battery case, includes mould assembly and lower mould assembly, its characterized in that: a first drawing die assembly, a second drawing die assembly and a shaping die assembly are sequentially arranged between the upper die assembly and the lower die assembly, wherein a first upper die of the first drawing die assembly, a second upper die of the second drawing die assembly and an upper shaping die of the shaping die assembly are connected to the upper die assembly, and a first lower die of the first drawing die assembly, a second lower die of the second drawing die assembly and a lower shaping die of the shaping die assembly are connected to the lower die assembly; the first stretching die assembly is used for stretching a first section with the maximum height part on the upper shell of the automobile battery box for the first time, the second stretching die assembly is used for stretching the upper shell of the automobile battery box for the second time in the integral forming process, and the shaping die assembly is used for shaping the corners of a formed product in an arc transition mode.
2. The mold for molding an upper case of a battery pack for an automobile according to claim 1, wherein: the first upper die and the first lower die of the first stretching die assembly form a first initial cavity of an upper shell section of the automobile battery box after die assembly, a convex hull cavity higher than the product size is arranged at the highest position of the right side of the initial cavity, the corresponding first upper die is higher than the final forming size of the product in the inner concave cavity of the convex hull cavity in size, the width size is larger than the final forming size of the product, the bottom of the inner concave cavity in the position is excessive in arc shape, and the opening of the inner concave cavity is excessive in arc shape.
3. The mold for molding the upper case of the battery pack of the vehicle as set forth in claim 2, wherein: the protruding height of the convex hull cavity is eliminated to the size after molding under the molding of the subsequent second stretching die assembly, and the material in the convex hull cavity is supplemented to the vertical step surface of the first step at the joint between the first section and the second section of the upper shell of the automobile battery box.
4. The mold for molding an upper case of a battery pack for an automobile according to claim 1, wherein: a second upper die and a second lower die of the second stretching die assembly are assembled to form an integral cavity of an upper shell of the automobile battery box, the upper die of the integral cavity at the vertical step surface of a first step at the joint between the first section and the second section is provided with a stretching wrinkle absorption rib protruding outwards, and the stretching wrinkle absorption rib extends along the length direction of the product and extends from the vertical step surface to the top surface of the second section; and the corresponding position of the second lower die and the second upper die is provided with a concave stretching wrinkle absorption groove matched with the stretching wrinkle absorption rib.
5. The mold for molding an upper case for a battery pack of an automobile according to claim 4, wherein: the two stretching wrinkle-absorbing ribs are respectively close to the two side edges of the product.
6. The mold for molding an upper case of a battery pack for an automobile according to claim 1, wherein: a second upper die and a second lower die of the second drawing die assembly are assembled to form an integral cavity of the upper shell of the automobile battery box, and the integral cavity is provided with a right-angle corner at the joint between the second section and the third section of the product; the second drawing die assembly at the right-angle corner is provided with a material pressing plate and a blank holder, the blank holder is connected to the second lower die, and the material pressing plate is connected to the second upper die; the pressing plate is characterized in that one surface of the pressing plate facing the blank holder is provided with a convex surface, one part of edge of the convex surface close to the whole cavity forms the shape of the bottom edge of a right-angle corner of the product cavity, and the blank holder is provided with a groove matched with the rest part of the convex surface of the pressing plate.
7. The mold for molding an upper case for a battery pack of an automobile according to claim 6, wherein: the groove wall of the groove on the blank holder is in arc transition, and the groove bottom is a through hole penetrating the thickness of the blank holder.
8. The mold for molding an upper case of a battery pack for an automobile according to claim 1, wherein: the shaping lower die of the shaping die assembly is provided with a reverse ridge strip at the bottom edge of a right-angle corner where a product section II and a section III are connected, the arc of the edge degree edge of the shaping upper die at the position, close to the section III, of the product section II is flatter than the arc of the transition edge of a final product, the section III is provided with a shaping and wrinkle absorbing rib protruding outwards and close to the right-angle corner, the shaping and wrinkle absorbing rib is arc-shaped along the edge of the right-angle corner, and a shaping and wrinkle absorbing groove is formed in the matching position of the shaping and wrinkle absorbing rib of the corresponding shaping lower die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811501752.0A CN111283076A (en) | 2018-12-10 | 2018-12-10 | Forming die of shell on automobile battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811501752.0A CN111283076A (en) | 2018-12-10 | 2018-12-10 | Forming die of shell on automobile battery box |
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| Publication Number | Publication Date |
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| CN111283076A true CN111283076A (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811501752.0A Pending CN111283076A (en) | 2018-12-10 | 2018-12-10 | Forming die of shell on automobile battery box |
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| CN (1) | CN111283076A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658115A (en) * | 2020-12-03 | 2021-04-16 | 上海赛科利汽车模具技术应用有限公司 | Forming method of upper cover of battery box |
| CN113414293A (en) * | 2021-08-24 | 2021-09-21 | 宁波明讯实业有限公司 | Stamping system of new energy automobile battery package upper cover |
| 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 |
-
2018
- 2018-12-10 CN CN201811501752.0A patent/CN111283076A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658115A (en) * | 2020-12-03 | 2021-04-16 | 上海赛科利汽车模具技术应用有限公司 | Forming method of upper cover of battery box |
| CN113414293A (en) * | 2021-08-24 | 2021-09-21 | 宁波明讯实业有限公司 | Stamping system of new energy automobile battery package upper cover |
| 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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