New energy automobile battery cover forming method and mold

Abstract

The invention discloses a new energy automobile battery cover forming method and a die, the die comprises an upper die, a blank holder and a lower die, the blank holder is arranged between the upper die and the lower die, a blank holder insert is fixed on the blank holder, an upper die insert is arranged on the upper die, the blank holder insert and the upper die insert are arranged oppositely, and the blank holder insert and the upper die insert are arranged oppositely. A gap is reserved between the edge of the blank holder insert and the edge of the blank holder, a gap is reserved between the edge of the upper die insert and the edge of the upper die, and at least one pressure base plate is arranged on the back face of the upper die. The mold has the beneficial effects that the actual stress area of the pressing face of the upper mold and the lower mold is reduced or the pressure base plate is arranged to increase the local pressure so as to increase the pressure, close arrangement and intermolecular combination of the internal structure of a material are facilitated, the strength, hardness and other mechanical properties of a product are improved, the precision and quality of the product are improved, and the production cost is reduced. The die structure is simplified, cost is reduced, abrasion is reduced, the service life of the die is prolonged, and the requirement for forming pressure is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy automobile parts manufacturing, and in particular to a new energy automobile battery cover forming die and a forming method thereof. Background Art

[0002] With the vigorous development of the new energy vehicle industry, the battery cover is a key component to ensure the safety and normal operation of the battery, and its molding quality is of vital importance. However, in the existing battery cover molding mold technology, there is often insufficient pressure or unreasonable pressure distribution caused by insufficient pressure source, which makes it easy to have quality problems such as uneven battery cover wall thickness, insufficient local structural strength, and surface defects during the molding process. It may also lead to adverse consequences such as increased mold wear and low production efficiency. Traditional mold technology lacks precision and flexibility in pressure control, and it is difficult to meet the strict requirements of new energy vehicles for high quality and high performance of battery covers. Therefore, there is an urgent need for a technical solution that can effectively optimize the pressure of the battery cover molding mold. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a high-performance new energy battery cover molding method and mold.

[0004] The technical solution is as follows: A method for forming a new energy battery cover, the main points of which are: comprising the following steps:

[0005] S1: Analyze the structure of the car battery cover and determine the position where the pressure needs to be increased during mold forming;

[0006] S2: The profile outside the product area and the profile irrelevant to the mold forming process on the pressing surface of the upper mold and the lower mold are reduced, so that the force-bearing area of ​​the pressing surface of the upper mold and the lower mold is reduced, thereby increasing the molding pressure of the automobile battery cover;

[0007] S3: When the automobile battery cover is molded, a pressure pad is set on the back of the upper mold where it is easy to rebound and deform, and the thickness of the pressure pad is adjusted by the number of pads, so as to increase the local pressure and improve the rebound of the automobile battery cover;

[0008] S4: Put the blank of the automobile battery cover into the forming mold, and close the upper mold and the lower mold through a press to obtain an automobile battery cover product that meets the requirements.

[0009] The mold used in the method for forming the battery cover of a new energy vehicle as described above, the key points are: it includes an upper mold, a pressure ring and a lower mold, the pressure ring is arranged between the upper mold and the lower mold, a pressure ring insert is fixed on the pressure ring, an upper mold insert is arranged on the upper mold, the pressure ring insert and the upper mold insert are arranged opposite to each other, a gap is left between the pressure ring insert and the edge of the pressure ring, and a gap is left between the upper mold insert and the edge of the upper mold. By adopting the above structure, the molding surface outside the product area is excluded on the pressing surface of the upper mold and the lower mold, and irrelevant molding surfaces are avoided, which can reduce the actual force-bearing area of ​​the pressing surface. By reducing the force-bearing area to increase the pressure, the mechanical properties of the product can be enhanced, the product precision and quality can be improved, and the service life of the mold can be extended.

[0010] As a preference: pressure pads are provided at the four vertex edges of the back side of the upper mold. With the above structure, the provision of pressure pads can enhance local pressure, optimize defective areas, and thus improve product performance.

[0011] As a preference: a pad gasket is provided between the pressure pad and the upper die. With the above structure, the thickness of the pressure pad can be adjusted by the pad gasket, the pressure in the top corner area can be increased, and the product shape can be optimized.

[0012] As a preferred embodiment, the upper mold insert is arranged around the outer edge of the upper mold, and a gap is left between the upper mold insert and the outer edge of the upper mold. With the above structure, a wedge-shaped adjustment key can be installed in the gap, which is conducive to the disassembly and assembly of the upper mold insert and the gap adjustment to a certain extent, thereby preventing the mold from being damaged by double-piece damage.

[0013] As a preferred embodiment, the blank holder ring insert is fixed on the side of the blank holder ring close to the upper die, the blank holder ring insert is arranged along the edge of the blank holder ring, and a gap is left between the blank holder ring insert and the outer edge of the blank holder ring. With the above structure, a stop key can be installed in the gap outside the blank holder ring insert, which is convenient for disassembly and assembly.

[0014] As a preference: positioning pins are provided at both wide sides of the blank holder insert, one end of the positioning pin passes through the blank holder insert and the blank holder in turn, a connecting seat is provided at the protruding end of the positioning pin, the connecting seat is fixedly connected to the lower die, and a protective cap is sleeved on the other end of the positioning pin. With the above structure, the end of the positioning pin close to the protective cap is in a half-moon shape for subsequent parts use.

[0015] Preferably, a material return pin is provided at the top corner of the upper die, and the material return pin is inserted into the upper die and the upper die insert in sequence. With the above structure, the material return pin can be provided to facilitate the removal of parts after the product is formed, and avoid the parts from being closely attached to the upper die and the upper die insert.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: on the pressing surfaces of the upper and lower molds, the mold surfaces outside the product area are excluded or avoided, and the mold surfaces irrelevant to the current process are avoided, so as to reduce the force area of ​​the pressing surface; a pressure pad is arranged on the back of the upper mold to increase the local pressure; the pressure is increased by combining the technology of reducing the force area or increasing the local pressure, so that the mechanical properties of the product are better, the precision and quality of the product are improved, the mold structure is simplified, the cost is reduced, the service life of the mold is extended, and the demand for molding pressure is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 Side view of

[0019] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of M in the middle;

[0021] Figure 5 Exploded view of the upper die 1 and the pressure pad 6;

[0022] Figure 6 Schematic diagram of the upper die 1 and the upper die insert 5;

[0023] Figure 7 An enlarged schematic diagram of the upper die insert 5

[0024] Figure 8 Schematic diagram of the lower mold 2;

[0025] Fig. 9 It is a schematic diagram of the blank holder insert 5 and the blank holder 3;

[0026] Fig.10 is the avoidance area diagram of the blank holder insert 5;

[0027] Fig.11 It is a schematic diagram of the connection between the lower die 2 and the pressure ring insert 4. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with embodiments and drawings.

[0029] like Figures 1 to 11 As shown, a new energy vehicle battery forming method comprises the following steps:

[0030] S1: Analyze the structure of the car battery cover and determine the position where the pressure needs to be increased during mold forming;

[0031] S2: The profile outside the product area and the profile irrelevant to the mold forming process on the pressing surface of the upper mold 1 and the lower mold 2 are reduced, so that the force-bearing area of ​​the pressing surface of the upper mold 1 and the lower mold 2 is reduced, thereby increasing the molding pressure of the automobile battery cover;

[0032] S3: When the automobile battery cover is molded, a pressure pad 6 is arranged on the back of the upper mold 1 at the part that is easy to rebound and deform, and the thickness of the pressure pad 6 is adjusted by the number of pad gaskets 10, so that the local pressure is increased and the rebound of the automobile battery cover is improved;

[0033] S4: Put the blank of the automobile battery cover into the forming mold, and close the upper mold 1 and the lower mold 2 through a press to obtain an automobile battery cover product that meets the requirements.

[0034] A mold for a new energy vehicle battery cover molding method as described above comprises an upper mold 1, a pressure ring 3 and a lower mold 2, wherein the pressure ring 3 is arranged between the upper mold 1 and the lower mold 2, a pressure ring insert 4 is fixed on the pressure ring 3, an upper mold insert 5 is arranged on the upper mold 1, the pressure ring insert 4 and the upper mold insert 5 are arranged opposite to each other, a gap is left at the edge of the pressure ring insert 4 and the pressure ring 3, the pressure ring 3 can prevent the product from flowing unevenly and causing necking during the deformation process, thereby ensuring the integrity and dimensional accuracy of the workpiece, and excluding or avoiding the molding surface outside the product area on the pressing surface of the upper mold 1 and the lower mold 2, as well as the molding surface that is irrelevant to this process. The molding surface is avoided to reduce the force area of ​​the pressing surface. Pressure pads 6 are arranged at the four top corner edges of the back side of the upper mold 1, which can increase the local pressure, thereby increasing the pressure. To a certain extent, the demand for complex mold structure and the processing time cost are reduced, and the demand for molding pressure can be reduced. Although the local pressure increases, the overall molding pressure required may not increase significantly due to the reduction in the force area. In some cases, it may even reduce the requirements for the overall pressure output of the equipment. Increasing the pressure is conducive to the close arrangement of the internal structure of the material and the bonding between molecules, so that the strength, hardness and other mechanical properties of the product are improved.

[0035] like Figure 1 , Figure 3 and Figure 5As shown, there are four pressure pads 6, which are respectively arranged at the four vertices of the upper end surface of the upper mold 1. Pad gaskets 10 are arranged between the pressure pads 6 and the upper mold 1. The number of pad gaskets 10 can be adjusted according to the situation to adjust the thickness of the pressure pads 6 to achieve local pressure enhancement. Strong local pressure can make the material fit the shape of the mold cavity more closely, reduce the shrinkage and deformation of the material during the molding process, improve the product rebound factor, and uniform and appropriately increased local pressure can make the material flow more smoothly in the mold cavity, reducing surface defects caused by uneven material flow, such as slippage, wrinkling, waves, etc. This is very important for manufacturing products with high-precision dimensional requirements.

[0036] like Figure 7 As shown in the figure, X, Y, and Z are respectively the strong pressure area of ​​grinding and bonding, the weak area of ​​drawing ribs and grinding and bonding coloring, and a pressure pad 6 and a pad gasket 10 are arranged on the back of the upper mold 1 to increase the local pressure. The local strong pressure effect of the mold part surface can eliminate the local wrinkling phenomenon in the part forming process, which is more conducive to product forming.

[0037] The reasonable increase of local pressure can make the force exerted by the mold on the material more accurate and effective during the working process, reducing the damage to the mold caused by uneven wear and impact of the material on the mold. At the same time, due to the better fluidity of the material during the molding process, the accumulation of material in the mold cavity is reduced, the wear on the mold is reduced, and the service life of the mold is extended.

[0038] like Figures 6 to 10 As shown, the upper mold insert 5 is arranged along the edge of the pressing surface of the upper mold 1, and a gap is left between the upper mold insert 5 and the outer edge of the upper mold 1. The pressure ring insert 4 is arranged along the edge of the pressing surface of the pressure ring 3 and the upper mold 1, and a gap is left between the pressure ring insert 4 and the outer edge of the pressure ring 3. The upper mold insert 5 and the pressure ring insert 4 can overlap correspondingly, wherein N is the avoidance area, so that the force area of ​​the pressing surface of the upper mold 1 and the lower mold 2 is reduced. When the applied force remains unchanged, the force area is reduced and the pressure is increased.

[0039] like Figure 2 , Figure 3 and Fig.11 As shown, locating pins 4a are provided at the two wide sides of the blank holder insert 4, one end of the locating pin 4a passes through the blank holder insert 4 and the blank holder 3 in sequence, a connecting seat 7 is provided at the protruding end of the locating pin 4a, the connecting seat 7 is fixedly connected to the lower mold 2, and a protective cap 9 is sleeved on the other end of the locating pin 4a, the locating pin 4a near one end of the protective cap 9 is in a crescent shape, which is a crescent positioning, and is used to form a crescent shape on the material, which is convenient for subsequent parts positioning.

[0040] like Figure 3 and Figure 4 As shown, a material ejection pin 8 is provided at the top corner of the upper die 1, and the material ejection pin 8 is inserted into the upper die 1 and the upper die insert 5 in sequence to prevent the part from being tightly attached to the upper die 1 after molding, which is conducive to convenient production and part removal.

[0041] In addition, the mold of the present invention is made of high-strength materials to ensure that the mold will not be deformed or damaged when the pressure is increased. At the same time, the surfaces of the upper mold insert 5 and the pressure ring insert 4 of the mold are specially treated to improve the wear resistance and corrosion resistance of the mold, which can effectively extend the service life of the mold.

[0042] Test example

[0043] The area and pressure of the products made by the above-mentioned molding die and the products made by ordinary molds were compared under the same pressure conditions. The comparison results are shown in the following table:

[0044] Comparison results table

[0045] Mould pressure Force area pressure The mold of the present invention 100kn <![CDATA[34720.9687mm 2 ]]> 2.726Mpa Ordinary mold 100kn <![CDATA[109548.9148mm 2 ]]> 0.918Mpa

[0046] The comparison results show that under the same pressure conditions, the force area of ​​the mold provided by the present invention is significantly reduced and the pressure is significantly increased. Increasing the pressure is conducive to the close arrangement of the internal structure of the material and the bonding between molecules, so that the mechanical properties of the product such as strength and hardness are improved. Therefore, the product made by using the mold provided by the present invention has better mechanical properties, better precision and quality. After production is completed, the mold needs to be cleaned and maintained in time to ensure the performance and service life of the mold.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A new energy vehicle battery cover forming method, characterized in that: The following steps are involved: S1: Analyze the structure of the car battery cover and determine the position where the pressure needs to be increased during mold forming; S2: The molding surface outside the product area and the molding surface irrelevant to the mold forming process on the pressing surface of the upper mold (1) and the lower mold (2) are reduced, so that the force-bearing area of ​​the pressing surface of the upper mold (1) and the lower mold (2) is reduced, thereby increasing the molding pressure of the automobile battery cover; S3: When the automobile battery cover is molded, a pressure pad (6) is arranged on the back of the upper mold (1) at a location that is prone to rebound and deformation, and the thickness of the pressure pad (6) is adjusted by the number of pad gaskets (10), thereby increasing the local pressure and improving the rebound of the automobile battery cover; S4: placing the blank of the automobile battery cover into a forming mold, and closing the upper mold (1) and the lower mold (2) by a press to obtain an automobile battery cover product that meets the requirements.

2. A mold for a new energy vehicle battery cover molding method as claimed in claim 1, characterized in that: The invention comprises an upper die (1), a pressure ring (3) and a lower die (2); the pressure ring (3) is arranged between the upper die (1) and the lower die (2); a pressure ring insert (4) is fixed on the pressure ring (3); an upper die insert (5) is arranged on the upper die (1); the pressure ring insert (4) and the upper die insert (5) are arranged opposite to each other; a gap is left between the pressure ring insert (4) and the edge of the pressure ring (3); a gap is left between the upper die insert (5) and the edge of the upper die (1).

3. A new energy vehicle battery cover forming mold according to claim 1, characterized in that: Pressure pads (6) are arranged at the four top corner edges of the back side of the upper mold (1).

4. A new energy vehicle battery cover forming mold according to claim 3, characterized in that: A pad gasket (10) is provided between the pressure pad (6) and the upper mold (1).

5. A new energy vehicle battery cover forming mold according to claim 2, characterized in that: The upper mold insert (5) is arranged around the outer edge of the upper mold (1), and a gap is left between the upper mold insert (5) and the outer edge of the upper mold (1).

6. A new energy vehicle battery cover forming mold according to claim 5, characterized in that: The blank holder ring insert (4) is fixed on a side of the blank holder ring (3) close to the upper mold (1), and the blank holder ring insert (4) is arranged along the edge of the blank holder ring (3), and a gap is left between the blank holder ring insert (4) and the outer edge of the blank holder ring (3).

7. A new energy vehicle battery cover forming mold according to claim 2 or 6, characterized in that: Positioning pins (4a) are provided at both wide sides of the pressure ring insert (4), one end of the positioning pin (4a) passes through the pressure ring insert (4) and the pressure ring (3) in sequence, a connecting seat (7) is provided at the protruding end of the positioning pin (4a), the connecting seat (7) is fixedly connected to the lower mold (2), and a protective cap (9) is sleeved on the other end of the positioning pin (4a).

8. A new energy vehicle battery cover forming mold according to claim 5, characterized in that: A material ejection pin (8) is provided at the top corner of the upper die (1), and the material ejection pin (8) penetrates the upper die (1) and the upper die insert (5) in sequence.

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