Aluminum profile hot extrusion die for new energy automobile

Abstract

The utility model discloses an aluminum profile hot extrusion die for a new energy automobile, which comprises an upper die and a lower die which are matched with each other, an annular hole is formed in one side, far away from the lower die, of the upper die, a plurality of shunting bridges are arranged in the annular hole and divide the annular hole into a plurality of shunting holes, and the shunting holes are communicated with the upper die and the lower die. An annular hole is formed in the lower die, a back hole is formed in the center of the annular hole, a work head is arranged in the center of the side, close to the lower die, of the upper die in a protruding mode, a plurality of flow dividing holes are distributed in the circumferential direction of the work head, a plurality of water holes communicated with the back hole are formed in the work head, and a plurality of drainage channels and datum lines corresponding to the edges of the water holes are arranged on the work head. One side of the lower die is matched with the upper die and is provided with a welding chamber, the other corresponding side of the lower die is provided with a rear clearance tool corresponding to the work head, and a die hole which is communicated with the welding chamber and matched with the work head is formed in the rear clearance tool. The utility model has the beneficial effect that the working efficiency and the processing precision can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of manufacturing and processing of aluminum profile hot extrusion dies, and in particular to a hot extrusion die for aluminum profiles used in new energy vehicles. Background Technology

[0002] The hot extrusion die manufacturing process for new energy vehicle profiles is a crucial step in the manufacturing process. Its definition and classification are of great significance for the exploration and practice of the entire process. Simply put, hot extrusion die manufacturing refers to a process that shapes metal materials into the desired shape and size through extrusion under high temperature conditions. In the field of new energy vehicles, this process is widely used in the production of key components such as battery casings and vehicle frames.

[0003] Die design is a key aspect of the hot extrusion process for new energy vehicle profiles, and its basic principles directly determine the performance, lifespan, and quality of the final product.

[0004] In traditional mold manufacturing, due to the complexity of mold structure, back holes and upper mold drainage are all processed by electrical discharge machining, and there are many manual processing methods. Moreover, when processing water holes, there is no intuitive calibration standard. All these reasons lead to deviations in processing dimensions, which is not conducive to improving work efficiency and processing accuracy. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of existing mold processing technology in improving work efficiency and processing accuracy, and provides a hot extrusion mold for aluminum profiles for new energy vehicles that is conducive to improving work efficiency and processing accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hot extrusion die for aluminum profiles used in new energy vehicles includes an upper die and a lower die that cooperate with each other. The upper die has an annular hole on the side away from the lower die. Several flow dividers are arranged inside the annular hole, and the two ends of the flow dividers are fixedly connected to the inner and outer sides of the annular hole, respectively. The flow dividers divide the annular hole into several flow dividers. A back hole is provided at the center of the annular hole. A fork is protruding from the center of the side of the upper die closer to the lower die. Several flow dividers are distributed around the fork. Several water holes communicating with the back hole are opened in the fork. Several drainage channels and a baseline corresponding to the edge of the water holes are provided on the fork. Ribs are protruding on the left and right side walls of the drainage channels. One side of the lower die matches the upper die and has a welding chamber. The other side of the lower die has a back cutter corresponding to the fork. The back cutter has a die hole that communicates with the welding chamber and matches the fork.

[0008] The mold includes an upper mold and a lower mold that cooperate with each other. The upper mold has an annular hole on the side furthest from the lower mold. Several flow-diverting bridges are arranged inside the annular hole, with their ends fixedly connected to the inner and outer sides of the annular hole, respectively. These bridges divide the annular hole into several flow-diverting holes. A back hole is located at the center of the annular hole. A fork protrudes from the center of the upper mold near the lower mold. Several flow-diverting holes are distributed around the fork. Several water holes communicating with the back hole are located inside the fork. The fork has several drainage channels and a reference line corresponding to the edge of the water holes. Ribs protrude from the left and right side walls of the drainage channels. One side of the lower mold matches the upper mold and has a welding chamber. The corresponding side of the lower mold has a back cutter corresponding to the fork. The back cutter has a mold hole communicating with the welding chamber and matching the fork. By setting the reference line, calibration can be performed more intuitively during the machining of water holes, ensuring dimensional accuracy and consistency, ultimately improving work efficiency and machining precision. When the mold is in use, the aluminum flows through the annular hole of the upper mold to the lower mold. During this process, the aluminum flow is first blocked by the diversion bridge, and then dispersed through several diversion holes before entering the welding chamber to ensure that the aluminum flow rate is slow.

[0009] Preferably, the diversion bridge is arranged at an angle, and the vertical distance between the end of the diversion bridge that is fixedly connected to the outer wall of the annular hole and the fork is greater than the vertical distance between the end of the diversion bridge that is fixedly connected to the inner wall of the annular hole and the fork. The design of the diversion bridge and the back hole helps to reduce the impact force of the aluminum flow on the upper mold, effectively ensuring the tensile strength of the upper mold.

[0010] Preferably, the top of the flow divider bridge is far from the lower mold, and the bottom of the flow divider bridge is close to the lower mold. The width of the flow divider bridge gradually decreases from the top away from the lower mold to its bottom. This design ensures that when multiple aluminum streams formed by several flow dividers flow together into the welding chamber, the pressure is evenly distributed, resulting in sufficient aluminum supply in the welding chamber and a uniform and stable flow into the mold orifice, thus improving product quality.

[0011] Preferably, several baselines are distributed along the direction of the drainage channel, with each baseline paired on the left and right sides of the corresponding drainage channel. This facilitates better and more intuitive calibration during the machining of water holes, resulting in more accurate machining dimensions.

[0012] Preferably, the rear cutter is provided with a primary cutter line, a secondary cutter line and a rear cutter line from the inside to the outside, the front end of the die hole is connected to the welding chamber, and the primary cutter line is located at the rear end of the die hole.

[0013] Preferably, the front of the welding chamber is close to the upper mold, the rear of the welding chamber is far from the upper mold, a working zone is provided behind the welding chamber, and the primary empty knife line is located on the working zone.

[0014] The beneficial effects of this utility model are: it allows for better and more intuitive calibration during water hole processing, resulting in more accurate dimensions; it improves work efficiency and processing precision; it ensures a smooth aluminum flow rate; it prevents the die head from deforming or wobbling; the design of the diversion bridge and back hole helps to reduce the impact of the aluminum flow on the upper die, effectively ensuring the tensile strength of the upper die; when multiple aluminum flows formed by several diversion holes flow together into the welding chamber, the pressure is evenly distributed, ensuring sufficient aluminum supply in the welding chamber and a uniform and stable flow into the die holes, thus improving product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the mold structure in this utility model;

[0016] Figure 2 This is a schematic diagram of the upper mold structure;

[0017] Figure 3 yes Figure 2 The left view;

[0018] Figure 4 This is a structural diagram of the foreman;

[0019] Figure 5 This is a schematic diagram of the lower mold structure;

[0020] Figure 6 yes Figure 5 The left view;

[0021] Figure 7 This is a schematic diagram of the structure of the empty cutter after the lower die;

[0022] Figure 8 This is a schematic diagram of the working belt structure.

[0023] In the diagram: 1. Upper mold, 2. Lower mold, 3. Annular hole, 4. Diverter bridge, 5. Diverter hole, 6. Back hole, 7. Fork, 8. Water hole, 9. Drainage channel, 10. Baseline, 11. Rib, 12. Welding chamber, 13. Rear cutter, 14. Mold hole, 15. Primary cutter line, 16. Secondary cutter line, 17. Rear cutter line, 18. Working zone. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-6In the illustrated embodiment, a hot extrusion die for aluminum profiles used in new energy vehicles includes an upper die 1 and a lower die 2 that cooperate with each other. An annular hole 3 is formed on the side of the upper die 1 away from the lower die 2. Several flow dividers 4 are arranged inside the annular hole 3, with their ends fixedly connected to the inner and outer sides of the annular hole 3, respectively. The flow dividers 4 divide the annular hole 3 into several flow dividers 5. A back hole 6 is provided at the center of the annular hole 3. A fork 7 protrudes from the center of the side of the upper die 1 closest to the lower die 2. Several flow dividers 5 are distributed around the fork 7, and several flow dividers 5 are formed inside the fork 7. A water hole 8 is connected to the back hole 6. The die head 7 is provided with several drainage channels 9 and a reference line 10 corresponding to the edge of the water hole 8. Ribs 11 protrude from the left and right side walls of the drainage channels 9. One side of the lower die 2 matches the upper die 1 and is provided with a welding chamber 12. The other side of the lower die 2 is provided with a rear cutter 13 corresponding to the die head 7. The rear cutter 13 is provided with a die hole 14 that connects to the welding chamber 12 and matches the die head 7. The manufacturing process of this mold includes the upper die 1 processing process and the lower die 2 processing process. The upper die 1 processing process includes the following steps:

[0026] Step 1: Machine the external dimensions using a CNC lathe;

[0027] Step 2: Use a five-axis CNC to mill the dimensions of the flow divider hole 5, the tool head 7, the back hole 6, and the flow channel 9 to the correct dimensions. The back hole 6 is directly milled to the correct dimensions by a five-axis machining center, avoiding the drawbacks of traditional EDM, which takes a long time and results in inconsistent dimensions. The flow channel of the upper mold 1 is milled out by a five-axis machining center, eliminating the need for EDM and improving machining speed and accuracy.

[0028] Step 3: Based on baseline 10, machine the water hole 8 using wire cutting. By setting baseline 10, the machining of water hole 8 can be calibrated more effectively and intuitively, resulting in more accurate machining dimensions.

[0029] Step 4: Process the rib 11 by wire cutting, and then use electrical discharge machining to process a small amount of the corners and edges.

[0030] Step 5: After all processes are completed and inspected as required, heat treatment is performed.

[0031] Step six: Finally, the finishing process is carried out by CNC, wire cutting and EDM. With the change in process, most of the work is completed before heat treatment, which is different from the previous method of mainly processing after heat treatment. Now there is less allowance left for finishing, the processing is faster, the dimensions are more accurate, and there is less manual processing, which reduces manpower and ultimately achieves the goal of improving work efficiency and processing accuracy.

[0032] The machining process for the lower mold 2 includes the following steps:

[0033] Step A: Machine the external dimensions using a CNC lathe;

[0034] Step B: The welding chamber 12 is milled first by a five-axis CNC milling machine, and then the back empty tool 13 is milled.

[0035] Step C, heat treatment;

[0036] Step D involves finishing using a five-axis CNC machine, wire EDM, and slow wire EDM equipment.

[0037] Step E: Perform assembly inspection on the upper mold 1 and the lower mold 2.

[0038] In the heat treatment of the upper mold 1 processing technology, the hardness requirement is HRC: 51-52, tempering is performed 5 times, and each time it is held at 480℃ for 8 hours.

[0039] In the upper mold 1 processing technology, when the rib 11 is processed by wire cutting, a deformation allowance of 0.5mm needs to be reserved.

[0040] In the heat treatment of the lower mold 2 processing technology, the hardness requirement is HRC: 48.5-49.5, tempering is performed 5 times, and each time it is held at 480℃ for 8 hours.

[0041] By using the above-mentioned processing steps of molds, the manual processing method is reduced, and more mechanical processing is used to ensure the accuracy and consistency of dimensions, ultimately achieving the goal of improving work efficiency and processing precision.

[0042] like Figure 2 and Figure 3 As shown, the diversion bridge 4 is arranged at an angle, and the vertical distance between the end of the diversion bridge 4 that is fixedly connected to the outer wall of the annular hole 3 and the fork 7 is greater than the vertical distance between the end of the diversion bridge 4 that is fixedly connected to the inner wall of the annular hole 3 and the fork 7.

[0043] like Figure 3 As shown, the top of the flow divider bridge 4 is far away from the lower mold 2, the bottom of the flow divider bridge 4 is close to the lower mold 2, and the width of the flow divider bridge 4 gradually decreases from the top away from the lower mold 2 to its bottom.

[0044] like Figure 4 As shown, several baselines 10 are distributed along the direction of the drainage channel 9, and are distributed in pairs on the left and right sides of the corresponding drainage channel 9.

[0045] like Figure 7 As shown, the rear air cutter 13 is provided with a primary air cutter line 15, a secondary air cutter line 16 and a rear air cutter line 17 from the inside to the outside. The front end of the die hole 14 is connected to the welding chamber 12, and the primary air cutter line 15 is located at the rear end of the die hole 14.

[0046] like Figure 8As shown, the front of the welding chamber 12 is close to the upper mold 1, and the rear of the welding chamber 12 is far from the upper mold 1. A working zone 18 is provided behind the welding chamber 12, and the primary free tool line 15 is located on the working zone 18. In the machining process of the lower mold 2, the back free tool 13 is milled according to the back free tool line 17, the secondary free tool line 16, and the primary free tool line 15 respectively. The primary free tool line 15 is drawn by three-dimensional modeling according to the height and low points of the working zone 18, and then machined by five-axis CNC, avoiding the need for re-machining of electrical discharge machining, reducing the number of processes, and improving accuracy.

[0047] When the mold is in use, aluminum flows into the lower mold 2 through the annular hole 3 of the upper mold 1. During this process, the aluminum flow is first blocked by the diversion bridge 4, and then dispersed through several diversion holes 5 before entering the welding chamber 12 to ensure a smooth flow rate. The design of the diversion bridge 4 and the back hole 6 helps to reduce the impact of the aluminum flow on the upper mold 1, effectively ensuring the tensile strength of the upper mold 1. The width of the diversion bridge 4 gradually decreases from the top away from the lower mold 2 to its bottom, so that when the multiple aluminum flows formed by the several diversion holes 5 flow together into the welding chamber 12, the pressure is evenly distributed, ensuring sufficient aluminum supply in the welding chamber 12 and enabling it to flow evenly and stably into the mold hole 14, thus improving product quality.

Claims

1. A hot extrusion die for aluminum profiles used in new energy vehicles, characterized in that, The mold includes an upper mold (1) and a lower mold (2) that cooperate with each other. An annular hole (3) is provided on the side of the upper mold (1) away from the lower mold (2). Several flow dividers (4) are arranged inside the annular hole (3). The two ends of each flow divider (4) are fixedly connected to the inner and outer sides of the annular hole (3), respectively. The flow dividers (4) divide the annular hole (3) into several flow dividers (5). A back hole (6) is provided at the center of the annular hole (3). A fork (7) is protruding from the center of the side of the upper mold (1) closest to the lower mold (2). Several flow dividers (5) are distributed around the fork (7). The forge (7) has several water holes (8) connected to the back hole (6). The forge (7) has several drainage channels (9) and a baseline (10) corresponding to the edge of the water hole (8). Ribs (11) protrude from the left and right side walls of the drainage channels (9). One side of the lower mold (2) matches the upper mold (1) and has a welding chamber (12). The other side of the lower mold (2) has a back cutter (13) corresponding to the forge (7). The back cutter (13) has a mold hole (14) connected to the welding chamber (12) and matching the forge (7).

2. The hot extrusion die for aluminum profiles used in new energy vehicles according to claim 1, characterized in that, The diversion bridge (4) is arranged at an angle. The vertical distance between the end of the diversion bridge (4) that is fixedly connected to the outer wall of the annular hole (3) and the foreman (7) is greater than the vertical distance between the end of the diversion bridge (4) that is fixedly connected to the inner wall of the annular hole (3) and the foreman (7).

3. The hot extrusion die for aluminum profiles used in new energy vehicles according to claim 1, characterized in that, The top of the diversion bridge (4) is away from the lower mold (2), the bottom of the diversion bridge (4) is close to the lower mold (2), and the width of the diversion bridge (4) gradually decreases from the top away from the lower mold (2) to its bottom.

4. The hot extrusion die for aluminum profiles used in new energy vehicles according to claim 1, characterized in that, Several baselines (10) are distributed along the direction of the drainage channel (9), and are distributed in pairs on the left and right sides of the corresponding drainage channel (9).

5. A hot extrusion die for aluminum profiles used in new energy vehicles according to claim 1, 2, 3, or 4, characterized in that, The rear air cutter (13) is provided with a first-level air cutter line (15), a second-level air cutter line (16) and a rear air cutter line (17) from the inside to the outside. The front end of the mold hole (14) is connected to the welding chamber (12), and the first-level air cutter line (15) is located at the rear end of the mold hole (14).

6. The hot extrusion die for aluminum profiles used in new energy vehicles according to claim 5, characterized in that, The front of the welding chamber (12) is close to the upper mold (1), and the rear of the welding chamber (12) is far from the upper mold (1). A working zone (18) is provided behind the welding chamber (12), and the first-level empty knife line (15) is located on the working zone (18).

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