Aluminum frame hot extrusion die for new energy automobile battery tray

Abstract

The aluminum frame hot extrusion die for the new energy automobile battery tray comprises a die body, an extrusion opening is formed in the surface of one side of the die body, an extrusion opening is formed in the other side of the die body, the extrusion opening communicates with the extrusion opening, and a die core used for forming the aluminum frame for the battery tray is arranged in the extrusion opening; each mold core comprises a support and a mold core block, the extrusion opening is of an L-shaped structure and is composed of a transverse groove section and a vertical groove section, the mold core blocks are fixedly arranged on the inner side of the center of the support, the number of the mold core blocks is three, the three mold core blocks are transversely distributed at intervals, and a transverse plate extrusion seam and a vertical plate extrusion seam are arranged. The bottom plate profile structure with the multiple cavities can be formed through the mold, the weight of a product can be reduced, the structural strength of the product can be improved, innovation is embodied, and the production technology and the product quality can be improved.

Description

Technical Field

[0001] This application relates to the technical field of hot extrusion dies, and particularly to a hot extrusion die for an aluminum frame used in a battery tray of a new energy vehicle. Background Art

[0002] The aluminum frame for an automotive battery tray is a structural component used in the battery system of a new energy vehicle. It is usually made of aluminum alloy materials and aims to provide support, fixation, and protection for the battery. The aluminum frame is widely used in the design of battery trays due to its lightweight, good thermal conductivity, and high specific strength. The design and application of the aluminum frame for an automotive battery tray need to comprehensively consider factors such as the performance requirements of the battery, the overall design of the vehicle, and cost-effectiveness. With the rapid development of the new energy vehicle industry, the application of the aluminum frame in battery trays is also constantly innovating and developing.

[0003] The density of aluminum alloy is relatively low, and using an aluminum frame helps to reduce the total weight of the battery system, thereby improving the energy efficiency and driving range of the vehicle. Currently, the bottom plate width of an L-shaped battery tray aluminum frame produced is too wide, resulting in uneven flow velocity of the aluminum flow here and insufficient feeding. As a result, the aluminum flow fuses poorly after converging in the cavity, and there are cavities in the extruded profile, with a high scrap rate. Moreover, the product weight is relatively large and it is prone to warping and deformation. Summary of the Utility Model

[0004] This application provides a hot extrusion die for an aluminum frame used in a battery tray of a new energy vehicle. As shown in the appendix Figure 8 The formed L-shaped aluminum frame bottom plate has a three-chamber structure, improving the product forming quality and structural strength and reducing the product weight.

[0005] The hot extrusion die for an aluminum frame used in a battery tray of a new energy vehicle provided by this application adopts the following technical solutions:

[0006] Aluminum frame hot extrusion die for new energy vehicle battery tray, including a die body. One side surface of the die body is provided with an extrusion inlet, and the other side is provided with an extrusion outlet. The extrusion inlet and the extrusion outlet are interconnected. Inside the extrusion inlet, there is a die core for forming the aluminum frame of the battery tray. The die core includes a bracket and core blocks. The bracket is connected to the inner wall of the extrusion inlet, dividing the extrusion inlet into seven flow holes with interconnected inner ends, which are respectively denoted as the upper left hole, the lower left hole, the middle upper hole, the middle lower hole, the first upper right hole, the second upper right hole, and the lower right hole. The extrusion outlet is an L-shaped structure, composed of a horizontal groove section and a vertical groove section. The upper left hole, the middle upper hole, the first upper right hole, and the second upper right hole are located on the upper side of the horizontal groove section. The lower left hole, the middle lower hole, and the lower right hole are located on the lower side of the horizontal groove section. The upper left hole, the lower left hole, the middle upper hole, and the middle lower hole are located on the left side of the vertical groove section. The first upper right hole is directly in front of the upper end of the vertical groove section. The second upper right hole and the lower right hole are located on the right side of the vertical groove section. The core blocks are fixedly arranged inside the center of the bracket. There are three core blocks, which are horizontally spaced and distributed in the horizontal groove section. There is a horizontal plate extrusion gap between the core blocks and the horizontal groove section, and there is a vertical plate extrusion gap between adjacent core blocks. Flow guiding grooves are provided on the inner walls of the middle upper hole and the middle lower hole, and the flow guiding grooves are connected to the vertical plate extrusion gap.

[0007] For further improvement, the number of the flow guiding grooves is set to four, and each vertical plate extrusion gap corresponds to two upper and lower flow guiding grooves.

[0008] For further improvement, a rectangular notch is provided on the outer side of the vertical groove section. A first trapezoidal notch is provided on the lower end face of the vertical groove section. A rectangular protrusion is provided on the outer end face of the horizontal groove section. A second trapezoidal notch is provided on the upper side of the outer end of the horizontal groove section.

[0009] For further improvement, a sunken plane is provided at the bottom of the extrusion inlet. The inner end of the extrusion outlet communicates with the sunken plane. A flow blocking step with a raised circle around the inner edge of the extrusion outlet is provided on the sunken plane. First upper flow guiding notches, second upper flow guiding notches, and lower flow guiding notches are provided on the flow blocking step. The first upper flow guiding notch and the second upper flow guiding notch are located on the upper side of the horizontal groove section, and the first upper flow guiding notch is connected to the second trapezoidal notch. The second upper flow guiding notch is located inside the middle upper hole. The lower flow guiding notch is located on the lower side of the horizontal groove section, and the lower flow guiding notch is located inside the middle lower hole.

[0010] For further improvement, a flow dividing groove is provided on the outer side of the center of the bracket, and the outer end of the middle upper hole is communicated with the outer end of the middle lower hole.

[0011] For further improvement, the width ratio of the horizontal plate extrusion gap to the vertical plate extrusion gap is 1, and the width ratio of the horizontal groove section to the vertical groove section is 2.5 - 2.

[0012] In summary, the present application includes at least one of the following beneficial technical effects:

[0013] 1. Optimize the aluminum flow distribution to improve the feeding efficiency: By designing seven flow holes inside the extrusion inlet, the aluminum flow is reasonably distributed to different flow paths, which helps the uniform flow of the aluminum flow inside the mold. The design of the flow holes enables the aluminum flow to fill each part of the mold more effectively, avoiding the problem of insufficient feeding caused by the overly wide bottom plate width.

[0014] 2. Improve the aluminum flow fusion to reduce the scrap rate: The setting of the mold core and the introduction of the diversion groove help the confluence and fusion of the aluminum flow in the cavity, reduce the cavity phenomenon of the extruded profile, and improve the product quality. By improving the design of the mold cavity structure, the waste products caused by uneven aluminum flow and poor fusion are reduced, thus reducing the scrap rate of the product.

[0015] 3. Innovative design of the bottom plate structure: The three core blocks of the mold core are horizontally spaced, and the settings of the horizontal plate extrusion seam and the vertical plate extrusion seam enable the mold to form a bottom plate profile structure with multiple chambers, which helps to reduce the product weight and improve the product structure strength, reflecting innovation and contributing to the improvement of production technology and product quality. Description of the Drawings

[0016] Figure 1 is the front view of the mold body.

[0017] Figure 2 is the front three-dimensional view of the mold body.

[0018] Figure 3 is Figure 2 the enlarged schematic view of the local structure in

[0019] Figure 4 is the rear view of the mold body.

[0020] Figure 5 is the rear three-dimensional view of the mold body.

[0021] Figure 6 is the sectional view of the extrusion inlet.

[0022] Figure 7 is the sectional view of the extrusion outlet.

[0023] Figure 8 is the schematic diagram of the cross-sectional shape of the aluminum frame profile.

[0024] Description of reference numerals: 10, mold body; 20, extrusion inlet; 21, upper left hole; 22, lower left hole; 23, middle upper hole; 24, middle lower hole; 25, first upper right hole; 26, second upper right hole; 27, lower right hole; 28, counterbore plane; 30, extrusion outlet; 31, horizontal groove section; 32, vertical groove section; 33, horizontal plate extrusion slit; 34, vertical plate extrusion slit; 35, multi-layer step structure; 36, rectangular notch; 37, first trapezoidal notch; 38, rectangular protrusion; 39, second trapezoidal notch; 40, mold core; 41, bracket; 42, core block; 43, diversion groove; 44, flow-blocking step; 45, first upper diversion notch; 46, second upper diversion notch; 47, lower diversion notch; 48, shunt groove. Detailed implementation manners

[0025] The following further describes the present application in conjunction with the attached Figure 1-8 drawings.

[0026] The embodiment of the present application discloses a hot extrusion die for an aluminum frame of a new energy vehicle battery tray.

[0027] Referring to Figure 1-5 , a hot extrusion die for an aluminum frame of a new energy vehicle battery tray includes a mold body 10. One side surface of the mold body 10 is provided with an extrusion inlet 20, and the other side is provided with an extrusion outlet 30. The extrusion inlet 20 and the extrusion outlet 30 are in communication with each other. The inside of the extrusion inlet 20 is provided with a mold core 40 for forming the aluminum frame of the battery tray; the mold core 40 includes a bracket 41 and a core block 42. The bracket 41 is connected to the inner wall of the extrusion inlet 20, dividing the extrusion inlet 20 into seven flow holes with interconnected inner ends, which are respectively denoted as the upper left hole 21, the lower left hole 22, the middle upper hole 23, the middle lower hole 24, the first upper right hole 25, the second upper right hole 26, and the lower right hole 27. The extrusion outlet 30 is an L-shaped structure, composed of a horizontal groove section 31 and a vertical groove section 32. The upper left hole 21, the middle upper hole 23, the first upper right hole 25, and the second upper right hole 26 are located above the horizontal groove section 31. The lower left hole 22, the middle lower hole 24, and the lower right hole 27 are located below the horizontal groove section 31. The upper left hole 21, the lower left hole 22, the middle upper hole 23, and the middle lower hole 24 are located on the left side of the vertical groove section 32. The first upper right hole 25 is located directly in front of the upper end of the vertical groove section 32. The second upper right hole 26 and the lower right hole 27 are located on the right side of the vertical groove section 32. As shown in the attached Figure 3 drawings, the core block 42 is fixedly arranged inside the center of the bracket 41. There are three core blocks 42, which are horizontally and spaced apart in the horizontal groove section 31. A horizontal plate extrusion slit 33 is provided between the core block 42 and the horizontal groove section 31, and a vertical plate extrusion slit 34 is provided between adjacent core blocks 42. Diversion grooves 43 are provided on the inner walls of the middle upper hole 23 and the middle lower hole 24, and the diversion grooves 43 are in communication with the vertical plate extrusion slit 34.

[0028] The working principle of the hot extrusion die is based on the plastic deformation of metals. During hot extrusion, the metal blank is heated to a certain temperature range to make it have sufficient plasticity, and then the extrusion forming is achieved through the following steps:

[0029] 1. Heating, loading the blank, and applying pressure: First, the metal blank is heated above its recrystallization temperature, which is high enough to make the metal soft enough to undergo plastic deformation under pressure. The heated metal blank is placed in the extrusion cylinder, which is a component of the hot extrusion die and is used to accommodate and apply pressure to the blank. An external force is applied to the blank through a press or an extruder to push it out of the extrusion cylinder. The pressure can come from a hydraulic press or a mechanical press.

[0030] 2. Metal flow: Under the action of pressure, the metal blank begins to flow in the extrusion cylinder towards the opening of the die, and plastic deformation of the metal occurs during this process. The die body 10 is the basic structure of the extrusion process. On one side, there is an extrusion inlet 20, and on the other side, there is an extrusion outlet 30. The two are interconnected to form a channel for the aluminum material to flow.

[0031] 3. Through the extrusion inlet 20: The bracket 41 divides the extrusion inlet 20 into seven flow holes, which are respectively located on the upper and lower sides of the horizontal groove section 31, and on the left, front, and right sides of the vertical groove section 32.

[0032] 4. Aluminum flow distribution: The design of the bracket 41 evenly distributes the aluminum flow into the seven flow holes, which correspond to different parts of the L-shaped extrusion outlet 30, ensuring a more balanced flow of the aluminum flow inside the die.

[0033] 5. Function of the diversion groove: Diversion grooves 43 are provided on the inner walls of the upper-middle hole 23 and the lower-middle hole 24, and these diversion grooves are connected to the vertical plate extrusion slit 34, further optimizing the distribution and flow path of the aluminum flow.

[0034] 6. Distribution of the core blocks: The aluminum flow of the metal blank is extruded through the extrusion outlet (cavity) of the die to form the required shape and size. The cavity design of the die determines the shape of the final product. The core blocks 42 are fixed inside the center of the bracket 41. There are three core blocks 42 horizontally spaced and distributed in the horizontal groove section 31, combined with the horizontal plate extrusion slit 33 and the vertical plate extrusion slit 34 to form a three-chamber structure of the L-shaped aluminum frame.

[0035] Through the above working process, the formed L-shaped aluminum frame bottom plate has a three-chamber structure, which not only improves the product forming quality, but also enhances the structural strength, effectively reduces the product weight, and achieves the goal of lightweight. The key to the working principle of the hot extrusion die lies in utilizing the plasticity of the metal at high temperature, and through the precisely designed die and controlled pressure, realizing the transformation of the metal blank into a product with a specific shape. This hot extrusion die solves the problems in traditional production, such as uneven aluminum flow velocity, insufficient feeding, poor aluminum flow fusion, cavities in the extruded profile, high scrap rate, large product weight, and easy warping and deformation caused by the over-wide width of the L-shaped battery tray aluminum frame bottom plate.

[0036] The above technical solution optimizes the distribution and flow of the aluminum flow through innovative die design, improves the forming quality, reduces the production cost, and meets the lightweight and high-strength requirements of the aluminum frame for new energy vehicle battery trays.

[0037] The number of the diversion grooves 43 is set to four, and each vertical plate extrusion seam 34 corresponds to the upper and lower two diversion grooves 43. This design ensures that each vertical plate extrusion seam 34 corresponds to the upper and lower two diversion grooves 43, thereby optimizing the flow and filling process of the aluminum material and improving the uniformity of the aluminum flow in the cavity.

[0038] The groove type of the diversion groove 43 is U-shaped. The U-shaped groove structure helps the aluminum material to form a continuous and uniform flow in the cavity, reduces the traces generated when the aluminum flows converge, and improves the surface quality of the product and the density of the internal structure. The bracket 41, the core block 42 and the die body 10 are integrally formed, and the die body 10 is in a cylindrical shape. This design reduces the assembly error, improves the overall precision and stability of the die. At the same time, the die body 10 being in a cylindrical shape helps to evenly distribute heat and pressure.

[0039] A multi-layer step structure 35 for demoulding is provided at the inner end of the extrusion port 30. This structural design helps the smooth progress of the demoulding process, reduces the damage to the product during demoulding, and improves the production efficiency. After being extruded, the metal product will quickly cool and solidify after leaving the die to form the final extruded part.

[0040] As shown in the appendix Figure 4 and 8As shown, a rectangular notch 36 is provided on the outer side of the vertical groove section 32, and a first trapezoidal notch 37 is provided on the lower end face of the vertical groove section 32. The rectangular notch 36 and the first trapezoidal notch 37 can improve the flow performance of the aluminum material at the corner, which helps the filling and exhaust of the aluminum material in the cavity. A rectangular protrusion 38 is provided on the outer end face of the horizontal groove section 31, and this protrusion forms a groove of the product, improving the structural strength of the product or serving as a positioning feature for product connection. A second trapezoidal notch 39 is provided on the upper side of the outer end of the horizontal groove section 31. Similar to the first trapezoidal notch 37, this design helps to regulate the flow and filling of the aluminum material. The above-mentioned designs are related to the function of the mold and the performance of the extruded aluminum frame product.

[0041] As shown in the attached Figure 6 figure, a counterbore plane 28 is provided at the bottom of the extrusion inlet 20, and the inner end of the extrusion outlet 30 is connected to the counterbore plane 28 to ensure the continuity of the aluminum flow from the extrusion inlet 20 to the extrusion outlet 30. A flow-blocking step 44 with a circle of protrusions around the inner end edge of the extrusion outlet 30 is provided on the counterbore plane 28. This design helps to control the speed and direction of the aluminum flow, preventing the aluminum material from flowing out too fast, thereby improving the filling quality of the profile and reducing material waste.

[0042] A first upper diversion notch 45, a second upper diversion notch 46, and a lower diversion notch 47 are provided on the flow-blocking step 44. The first upper diversion notch 45 and the second upper diversion notch 46 are located on the upper side of the horizontal groove section 31, and the first upper diversion notch 45 is connected to the second trapezoidal notch 39. This design helps to evenly distribute the aluminum flow on the upper side of the horizontal groove section 31. The second upper diversion notch 46 is located inside the middle upper hole 23, further refining the distribution of the aluminum flow to ensure sufficient aluminum flow supply to the middle upper hole 23. The lower diversion notch 47 is located on the lower side of the horizontal groove section 31, and the lower diversion notch 47 is located inside the middle lower hole 24. It helps to improve the aluminum flow filling in the middle lower hole 24 and reduce the defects at the bottom of the profile. The precise design of the flow-blocking step 44 and the diversion notches helps to improve the filling efficiency of the aluminum flow, reduce the cavities and defects inside the profile. The optimized aluminum flow distribution can enhance the three-chamber structure of the L-shaped aluminum frame bottom plate, thereby improving the strength of the overall structure. This mold design can adapt to the production of battery tray aluminum frames with complex cross-sectional shapes, meeting the requirements of lightweight and high strength for new energy vehicles.

[0043] As shown in the attached Figure 7As shown, a flow splitting groove 48 is provided outside the center of the bracket 41. The flow splitting groove 48 communicates the outer end of the upper-middle hole 23 with the outer end of the lower-middle hole 24. The flow splitting groove 48 helps to evenly distribute the incoming aluminum flow to the upper-middle hole 23 and the lower-middle hole 24, thereby improving the filling quality of the profile and reducing the material non-uniformity, enabling the die to adapt to the production of the aluminum frame of the battery tray with a complex cross-sectional shape. The design of the flow splitting groove 48 is one of the important structures for improving the performance of the hot extrusion die and the quality of the extruded profile. It realizes the precise control of the production process by optimizing the distribution and flow of the aluminum flow.

[0044] The width ratio of the horizontal plate extrusion slit 33 to the vertical plate extrusion slit 34 is 1, which helps to ensure the uniform extrusion of the profile in the horizontal and vertical directions, thereby obtaining more balanced and consistent product quality. The width ratio of the horizontal groove section 31 to the vertical groove section 32 is 2.5 - 2. This design takes into account the geometric shape and mechanical property requirements of the profile, as well as the flow characteristics of the aluminum flow in the die. The setting of the above width ratio is applicable to the aluminum frame of the battery tray with a complex cross-sectional shape, ensuring the mechanical properties and appearance quality of the profile in different directions. The precise dimensional ratio helps to reduce material waste and improve the filling efficiency, thereby improving the production efficiency and reducing the production cost.

[0045] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hot extrusion die for an aluminum frame for a battery tray of a new energy vehicle, comprising a die body (10), wherein a surface of one side of the die body (10) is provided with an extrusion port (20), and a surface of the other side of the die body (10) is provided with an extrusion port (30), wherein the extrusion port (20) and the extrusion port (30) are communicated with each other, and a die core (40) for forming an aluminum frame for a battery tray is provided inside the extrusion port (20); characterized in that: The mold core (40) comprises a bracket (41) and a core block (42). The bracket (41) is connected to the inner wall of the extrusion port (20) to divide the extrusion port (20) into seven flow holes whose inner ends are interconnected, which are respectively recorded as the upper left hole (21), the lower left hole (22), the middle upper hole (23), the middle lower hole (24), the first upper right hole (25), the second upper right hole (26) and the lower right hole (27). The extrusion port (30) is an L-shaped structure, which is composed of a transverse groove section (31) and a vertical groove section (32). The upper left hole (21), the middle upper hole (23), the first upper right hole (25) and the second upper right hole (26) are located on the upper side of the transverse groove section (31), and the lower left hole (22), the middle lower hole (24) and the lower right hole (27) are located on the lower side of the transverse groove section (31). The hole (21), the lower left hole (22), the upper middle hole (23) and the lower middle hole (24) are located on the left side of the vertical slot section (32); the first upper right hole (25) is located directly in front of the upper end of the vertical slot section (32); the second upper right hole (26) and the lower right hole (27) are located on the right side of the vertical slot section (32); the core block (42) is fixedly arranged on the inner side of the center of the bracket (41); there are three core blocks (42) which are distributed in the transverse slot section (31) at intervals in the transverse direction; a transverse plate extrusion seam (33) is provided between the core block (42) and the transverse slot section (31); a vertical plate extrusion seam (34) is provided between adjacent core blocks (42); guide grooves (43) are provided on the inner walls of the upper middle hole (23) and the lower middle hole (24); the guide grooves (43) are communicated with the vertical plate extrusion seam (34).

2. The aluminum frame hot extrusion die for the new energy vehicle battery tray according to claim 1 is characterized in that: The number of the guide grooves (43) is set to four, and each vertical plate extrusion seam (34) corresponds to two upper and lower guide grooves (43).

3. The aluminum frame hot extrusion die for the new energy vehicle battery tray according to claim 1 is characterized in that: A rectangular notch (36) is provided on the outer side of the vertical groove section (32), a first trapezoidal notch (37) is provided on the lower end face of the vertical groove section (32), a rectangular protrusion (38) is provided on the outer end face of the transverse groove section (31), and a second trapezoidal notch (39) is provided on the upper side of the outer end of the transverse groove section (31).

4. The aluminum frame hot extrusion die for the new energy vehicle battery tray according to claim 3 is characterized in that: A sinking platform plane (28) is provided at the bottom of the extrusion port (20), the inner end of the extrusion port (30) is connected to the sinking platform plane (28), a circle of blocking steps (44) protruding around the inner edge of the extrusion port (30) is provided on the sinking platform plane (28), and a first upper flow guiding notch (45), a second upper flow guiding notch (46) and a lower flow guiding notch (47) are provided on the blocking step (44), the first upper flow guiding notch (45) and the second upper flow guiding notch (46) are located on the upper side of the transverse groove section (31), and the first upper flow guiding notch (45) is connected to the second trapezoidal notch (39), the second upper flow guiding notch (46) is located inside the middle upper hole (23), the lower flow guiding notch (47) is located on the lower side of the transverse groove section (31), and the lower flow guiding notch (47) is located inside the middle lower hole (24).

5. The aluminum frame hot extrusion die for the new energy vehicle battery tray according to claim 4 is characterized in that: A flow dividing groove (48) is provided on the central outer side of the bracket (41), and the flow dividing groove (48) communicates the outer end of the middle upper hole (23) with the outer end of the middle lower hole (24).

6. The aluminum frame hot extrusion die for the new energy vehicle battery tray according to claim 1 is characterized in that: The width ratio of the horizontal plate extrusion slit (33) to the vertical plate extrusion slit (34) is 1, and the width ratio of the horizontal groove section (31) to the vertical groove section (32) is 2.5-2.

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