Warm extrusion forming process for scroll plate

Abstract

The invention belongs to the field of metal forming, and discloses a scroll plate warm extrusion forming process which comprises the following steps: 1, preparing a horizontal multi-connecting-rod toggle-rod type press with the nominal force stroke being greater than or equal to 60mm, and manufacturing a mold; a heating pipe hole is formed in the bottom die, a groove is formed in the front face of the bottom die, and a wire is arranged on a heating pipe in the heating pipe hole and arranged in the groove. 2, manufacturing a round aluminum alloy blank; 3, pickling to remove greasy dirt; (4) preheating; 5, smearing a water-based graphite solution and airing; 6, reheating; heating until the surface temperature of the blank is 400-445 DEG C, and keeping the temperature in the furnace for 2 hours; 7, heating the mold; 8, spraying oil-based graphite; and 9, warm extrusion forming. The surface of the scroll plate blank does not need to be subjected to sand blasting or shot blasting cleaning, the grain structure of the formed scroll plate is more compact, the risks of cracking, air holes or sand holes are reduced or avoided, the mechanical performance of the scroll plate is enhanced, the material utilization rate is increased, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of metal forming, and specifically relates to a warm extrusion forming process for a scroll disk. Background Art

[0002] As the core part of a scroll compressor, the aluminum alloy scroll disk is widely used in the air-conditioning compressor of new energy vehicles. The scroll disk has a unique design and is composed of two involute scroll bodies with the same shape but angular positions offset by 180°. At present, the existing scroll disks of domestic enterprises are all processed by pressure casting. However, the pressure-cast scroll disks have congenital defects, such as loose metal structure, easy generation of pores, shrinkage cavities or surface cracks, etc., which affect the structural strength, sealing performance and durability of the scroll disk. Therefore, a new technical solution is needed to solve the above problems.

[0003] The warm extrusion forming method for a scroll disk disclosed in the related reference CN1499765A features heating an aluminum alloy blank to 450 - 500 °C, lubricating it and then placing it into the die cavity for one-time extrusion forming, and then performing tempering treatment for sizing. This saves raw materials and has a short working hour, but the disadvantage is that the die wears greatly and the die service life is short. The forging and extrusion combined manufacturing process for the aluminum alloy dynamic scroll disk of new energy vehicles disclosed in CN114700454A includes the following steps: blanking work, the ratio of the blanking weight of the aluminum alloy bar to the weight of the finished part of the aluminum alloy dynamic scroll disk is two times or more; heating work; open-die hot forging, the forging temperature range is 450 °C - 530 °C; surface cleaning; blank segmentation; forming of concave pits by extrusion; cold extrusion or warm extrusion forming; post-forging treatment and machining. This reduces the forming difficulty and the material loss compared with ordinary open-die hot forging, but the disadvantage is that it still requires sandblasting or shot peening, and the operation steps are relatively troublesome. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a warm extrusion forming process for a scroll disk that does not require sandblasting or shot peening cleaning of the surface of the scroll disk blank, the formed scroll disk has a denser grain structure, reduces or avoids the risk of cracking, pores or sand holes, reduces the surface roughness of the scroll disk, improves corrosion resistance, enhances the mechanical properties of the scroll disk, extends the die service life, and greatly reduces the production cost.

[0005] To solve the above technical problems, the present invention provides a warm extrusion forming process for a scroll disk, which is characterized by including the following steps: Step 1: Prepare a horizontal multi-link toggle press with a nominal force stroke of the horizontal multi-link toggle press ≥ 60 mm, and manufacture a die; The mold includes a bottom mold and a punching rod; five to seven sector-shaped ejector pins and five to seven round ejector pins are arranged through the bottom mold. The sector-shaped ejector pins are located in the middle of the bottom mold, and the round ejector pins are located on the periphery of the sector-shaped ejector pins; the punching rod is installed in the punching die base through the punching rod handle. Heating tube holes are provided on the bottom mold, and grooves are provided on the front surface of the bottom mold. Heating tubes are installed in the heating tube holes, wires are configured on the heating tubes, the wires are arranged in the grooves, and the grooves are arranged outside the heating tubes. Step 2: Manufacture an aluminum alloy circular blank; saw the aluminum alloy circular blank according to the shape, size, weight and performance parameter requirements of the aluminum alloy scroll disk. The weight of the aluminum alloy circular blank is 0.3-0.5% greater than the actual weight of the scroll disk. Step 3: Pickle to remove oil; pickle the aluminum alloy circular blank to remove oil, and after cleaning, put it into a tunnel oven to dry. Step 4: Preheat; put the dried blank into a box furnace for preheating. Step 5: Apply a water-based graphite solution and let it dry. Step 6: Reheat; put the dried aluminum alloy circular blank into the box furnace again and heat it until the surface temperature of the blank reaches 400°C - 445°C. Step 7: Heat the mold. Step 8: Spray oil-based graphite; after the mold is heated, evenly spray the oil-based graphite onto the surface of the mold cavity. Stir the oil-based graphite for 4 - 6 minutes before spraying. Step 9: Warm extrusion forming; use a horizontal multi-link toggle press and the mold to warm extrude the aluminum alloy circular blank into shape.

[0006] By adopting the above technical solution, a horizontal multi-link toggle press is used to warm extrude an aluminum alloy circular blank into a scroll disk that meets the requirements at one time, replacing the previous pressure casting method. The warm extrusion forming speed of the scroll disk can generally be 28 - 36 pieces per minute. With this extrusion process, there is no need to sandblast or shot blast the surface of the scroll disk blank. The grain structure of the formed scroll disk is denser, reducing or avoiding the risk of cracking, porosity or sand holes, reducing the surface roughness of the scroll disk, improving corrosion resistance, having good plastic deformation, enhancing the tensile strength, compressive strength, bending strength and yield strength of the scroll disk, and enhancing the mechanical properties of the scroll disk; at the same time, it can ensure the size of the scroll disk, ensuring consistency and assembly accuracy. The warm extrusion forming of the scroll disk completed with this process has high material utilization rate, low energy consumption, prolongs the service life of the mold, and greatly reduces the production cost.

[0007] Preferably, in step one, the bottom die is clamped by clamping block I. The clamping block I is installed on the machine body through a tension bolt. The bottom die is arranged on the die holder cushion block, and the die holder cushion block is arranged inside the machine body. A knockout cushion block is arranged in the die holder cushion block. A sector ejector pin and a round ejector pin are installed on the knockout cushion block, and the sector ejector pin and the round ejector pin penetrate through the bottom die. The bottom die cooperates with the punch rod. The punch rod is installed in the clamping block II through the punch rod shank. The clamping block II is installed in the die holder through the die holder nut. A locknut is arranged at the tail of the die holder nut. Both the die holder nut and the locknut are screwed and installed at the external thread of the die holder. A punch rod cushion block, a plurality of adjusting cushion blocks, and a die holder cushion block are sequentially installed in the die holder. The punch rod cushion block abuts against the tail of the punch rod shank.

[0008] By adopting the above technical solution, a bottom die provided with 5 - 7 sector ejector pins and 5 - 7 round ejector pins is used. The bottom die is clamped by clamping block I. The bottom die cooperates with the punch rod, and the punch rod is installed in the die holder through the punch rod shank. A punch rod cushion block, a plurality of adjusting cushion blocks, and a die holder cushion block are sequentially installed in the die holder. The punch rod cushion block abuts against the tail of the punch rod shank. The stable die structure and reliable punch rod installation method help to reduce faults and downtime during the extrusion process and improve production efficiency.

[0009] Preferably, in step three, during pickling, the ratio of the acidic cleaning agent to water is 1:8. Then the solution is heated to 60 - 65 °C, and the aluminum alloy round blank is soaked in the heated solution for 15 minutes and then taken out and rinsed clean.

[0010] By adopting the above technical solution, compared with higher - concentration cleaning agents or more intense cleaning conditions, the pickling process at this ratio and temperature is milder, which helps to protect the surface quality of the aluminum alloy blank, avoid scratches and corrosion defects, reduce the risk of the aluminum alloy absorbing hydrogen during pickling, reduce the occurrence probability of hydrogen embrittlement, and improve the mechanical properties of the blank.

[0011] Preferably, in step four, pre - heat until the surface temperature of the blank reaches 250 °C - 260 °C.

[0012] By adopting the above technical solution, pre - heating the aluminum alloy round blank to 250 °C - 260 °C can significantly improve the plasticity of the material, improve the metal fluidity, reduce the deformation resistance and energy consumption, reduce die wear, optimize the tissue properties, and improve production efficiency and product quality.

[0013] Preferably, in step five, apply a water - based graphite solution to the aluminum alloy round blank. The ratio of the graphite particles to water in the water - based graphite solution is 1:3. After applying evenly, let it air - dry naturally for 4 - 6 minutes.

[0014] By adopting the above technical solution, applying a water-based graphite solution with a ratio of graphite particles to water of 1:3 evenly on the aluminum alloy circular blank and allowing it to air dry naturally for 4 - 6 minutes can significantly improve the lubrication performance, enhance the metal fluidity, prevent adhesion, protect the mold, reduce costs, and has the advantages of simple process, environmental friendliness, and suitability for high temperatures.

[0015] Preferably, in step six, the aluminum alloy circular blank is heated in a box furnace and kept warm for 2 hours before being taken out.

[0016] By adopting the above technical solution, keeping warm for 2 hours can make the temperature inside and on the surface of the blank reach uniform consistency. The uniform temperature distribution helps the blank flow evenly during the extrusion process, reduces defects such as insufficient filling and cracks, and improves the dimensional accuracy and surface quality of the finished product.

[0017] Preferably, in step seven, the bottom die 2 is heated to 280°C - 300°C, and at the same time, the punch 5 is heated to 280°C - 300°C with a blowtorch.

[0018] By adopting the above technical solution, aluminum alloy has good plasticity in the temperature range of 280°C - 300°C. Synchronously heating the bottom die and the punch to the same temperature can make the metal flow more evenly during the extrusion process, reduce defects such as insufficient filling, cracks, and folds caused by local temperature differences, and further improve the dimensional accuracy and surface quality of the finished product.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention uses a horizontal multi-link toggle press to directly warm-extrude an aluminum alloy circular blank into a vortex disk that meets the requirements, replacing the previous pressure casting method. The warm-extrusion forming speed of the vortex disk can generally reach 28 - 36 pieces per minute. With this process, there is no need to sandblast or shot blast the surface of the vortex disk blank. The grain structure of the formed vortex disk is denser, reducing or avoiding the risk of cracking, porosity, or sand holes, reducing the surface roughness of the vortex disk, improving corrosion resistance, having good plastic deformation, enhancing the tensile strength, compressive strength, bending strength, and yield strength of the vortex disk, and improving the mechanical properties of the vortex disk; at the same time, it can ensure the size of the vortex disk, ensuring consistency and assembly accuracy. The warm-extrusion forming of the vortex disk completed with this process has high material utilization rate, low energy consumption, prolongs the service life of the mold, and greatly reduces the production cost.

[0020] 2. The present invention is equipped with heating pipes in the bottom die, enabling the bottom die 2 to reach the required temperature faster, shortening the preheating time, improving production efficiency, and the wires of the heating pipes are led out through grooves to prevent the wire from affecting the feeding mechanism.

[0021] 3. The bottom die of the present invention is provided with 5 - 7 sector-shaped ejector pins and 5 - 7 circular ejector pins. The bottom die is clamped by clamping block Ⅰ. The bottom die cooperates with the punching rod, and the punching rod is installed in the die holder through the rod part of the punching rod. In the die holder, a punching rod spacer, multiple adjusting spacers, and a die holder spacer are sequentially installed. The punching rod spacer abuts against the tail of the rod part of the punching rod. The stable die structure and reliable punching rod installation method help reduce faults and downtime during the extrusion process and improve production efficiency. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the die of the present invention; Figure 2 It is a partially enlarged view of the present invention; Figure 3 It is a three-dimensional view of the bottom die of the present invention; Figure 4 It is a bottom view of the bottom die of the present invention.

[0023] Drawing numbers: 1. Die holder spacer, 2. Bottom die, 3. Clamping block Ⅰ, 4. Tension bolt, 5. Punching rod, 6. Rod part of the punching rod, 7. Die holder nut, 8. Clamping block Ⅱ, 9. Die holder, 10. Punching rod spacer, 11. Adjusting spacer, 12. Die holder spacer, 13. Locknut, 14. Stripping pad, 15. Sector-shaped ejector pin, 16. Circular ejector pin, 17. Heating pipe hole, 18. Groove. Detailed Embodiment

[0024] The scroll disk warm extrusion forming process is characterized by including the following steps: Step 1: Prepare a horizontal multi-link toggle press with a large nominal force stroke JB88 - 1000T, and the nominal force stroke ≥ 60mm, and manufacture the die. Using a horizontal multi-link toggle press with a large nominal force stroke JB88 - 1000T and the nominal force stroke ≥ 60mm can realize a gentle extrusion forming process. When the die advances during the nominal force stroke, the speed becomes slower and slower, and the extrusion force becomes larger and larger. There is a pressure holding time at the end, which is beneficial to the warm extrusion forming of the product and increases the service life of the die. Therefore, the temperature requirement for the blank is relatively low, and the temperature range is relatively larger. The blank can complete the warm extrusion forming at a temperature of 400℃ - 445℃; using this horizontal multi-link toggle press with a large nominal force stroke to extrude the product is more plump and the finished product rate is higher.

[0025] Such as Figure 1 、 2As shown in the figure, the mold includes a bottom die 2 and a punching rod 5. Five to seven sector ejector pins 15 and five to seven round ejector pins 16 are penetrated through the bottom die 2. The sector ejector pins 15 are located in the middle of the bottom die 2, and the round ejector pins 16 are located outside the sector ejector pins 15. The optimal solution is to use six sector ejector pins 15 and six round ejector pins 16. The punching rod 5 is installed in the punching die base 9 through the punching rod handle 6. The bottom die 2 and the punching rod 5 used in this process are made of hot work die steel 1.2367, a red-hardening material. Hot work die steel 1.2367 has excellent thermal fatigue resistance, excellent high-temperature strength and toughness, good thermal conductivity, and high hardenability. It still maintains high hardness and anti-deformation ability at a working temperature of 500 - 600 °C, and can withstand impact loads at the same time. When the bottom die 2 and the punching rod 5 come into contact with the billet at a relatively high temperature, the deformation amount is extremely small, and the mold is durable and has strong stability.

[0026] Step 2: Manufacture an aluminum alloy circular billet. According to the shape, size, weight, and performance parameter requirements of the aluminum alloy scroll disk, design the billet size. The raw material used is 4A01 aluminum alloy, and the weight of the aluminum alloy circular billet is 0.3 - 0.5% greater than the actual weight of the scroll disk. Select an aluminum rod according to the designed diameter size of the aluminum billet and saw it into the aluminum billet by blanking.

[0027] Step 3: Pickle to remove oil stains. Pickle the aluminum alloy circular billet to remove oil stains, and put it into a tunnel oven to dry after cleaning.

[0028] Step 4: Preheat. Put the dried billet into a box furnace for preheating.

[0029] Step 5: Apply a water-based graphite solution and let it dry.

[0030] Step 6: Reheat. Put the dried aluminum alloy circular billet into the box furnace again, heat it until the surface temperature of the billet reaches 400 °C - 445 °C, and take out the billet after holding it in the furnace for 2 hours. After the aluminum alloy circular billet is heated in the box furnace and held for 2 hours and then taken out, holding for 2 hours can make the temperature inside and on the surface of the billet reach uniform consistency. The uniform temperature distribution helps the billet to flow uniformly during the extrusion process, reduces defects such as insufficient filling and cracks, and improves the dimensional accuracy and surface quality of the finished product. Putting the dried aluminum alloy circular billet into the box furnace again and heating it to a surface temperature of 400 °C - 445 °C and holding for 2 hours can reduce the friction during the extrusion forming of the aluminum billet and reduce the required extrusion force.

[0031] Step 7: Heat the mold.

[0032] Step 8: Spraying oil-based graphite; after the mold is heated, use a special spraying device to evenly spray the oil-based graphite onto the surface of the mold cavity. Stir the oil-based graphite for 4 - 6 minutes before spraying, preferably 5 minutes. Smearing the oil-based graphite is beneficial for the vortex disk product to be removed from the mold cavity after warm extrusion forming. At the same time, it can also extend the service life of the mold and improve the yield rate of the vortex disk.

[0033] Step 9: Warm extrusion forming; use a horizontal multi-link toggle press with a large nominal force stroke JB88 - 1000T and a mold to warm extrude the aluminum alloy circular blank.

[0034] This process uses a horizontal multi-link toggle press with a large nominal force stroke JB88 - 1000T to warm extrude the aluminum alloy circular blank into a vortex disk that meets the requirements in one go. It has relatively low requirements for the blank temperature and a relatively large temperature range. The mold is durable, enabling the extruded product to be full and having a high yield rate. This process replaces the previous pressure casting method or other extrusion processes. The warm extrusion forming speed of the vortex disk can generally be 28 - 36 pieces per minute. With this extrusion process, there is no need to sandblast or shot blast the surface of the vortex disk blank. The grain structure of the formed vortex disk is denser, reducing or avoiding the risk of cracking, porosity, or sand holes, lowering the surface roughness of the vortex disk, improving corrosion resistance, having good plastic deformation, enhancing the tensile strength, compressive strength, flexural strength, and yield strength of the vortex disk, and improving the mechanical properties of the vortex disk. At the same time, it can ensure the size of the vortex disk, ensuring consistency and assembly accuracy. The warm extrusion forming of the vortex disk completed with this process has a high material utilization rate, low energy consumption, extends the service life of the mold, and greatly reduces the production cost.

[0035] In Step 1, the bottom die 2 is clamped by the clamping block I 3. The clamping block I 3 is installed on the machine body through the tension bolt 4. The bottom die 2 is set on the die holder spacer 1, and the die holder spacer 1 is set inside the machine body. A knockout pad 14 is arranged in the die holder spacer 1. A sector ejector pin 15 and a round ejector pin 16 are installed on the knockout pad 14. The sector ejector pin 15 and the round ejector pin 16 penetrate through the bottom die 2. The bottom die 2 cooperates with the punch rod 5. The punch rod 5 is installed in the clamping block II 8 through the punch rod shank 6. The clamping block II 8 is installed in the die holder 9 through the die holder nut 7. A locknut 13 is arranged at the tail of the die holder nut 7. Both the die holder nut 7 and the locknut 13 are screwed and installed on the external thread of the die holder 9. In the die holder 9, a punch rod spacer 10, multiple adjusting spacers 11, and a die holder spacer 12 are installed in sequence. The punch rod spacer 10 abuts against the tail of the punch rod shank 6. Using a bottom die with 5 - 7 sector ejector pins 15 and 5 - 7 round ejector pins 16, the optimal solution is to use 6 sector ejector pins 15 and 6 round ejector pins 16. The bottom die 2 is clamped by the clamping block I 3. The bottom die cooperates with the punch rod 5. The punch rod 5 is installed in the die holder 9 through the punch rod shank 6. In the die holder 9, a punch rod spacer 10, multiple adjusting spacers 11, and a die holder spacer 12 are installed in sequence. The punch rod spacer 10 abuts against the tail of the punch rod shank 6. The stable die structure and reliable punch rod installation method help reduce faults and downtime during the extrusion process and improve production efficiency.

[0036] In Step 1, as Figure 2 , 3 shown, a heating tube hole 17 is arranged on the bottom die 2. A groove 18 is arranged on the front surface of the bottom die 2. A heating tube is arranged in the heating tube hole 17. A wire is connected to the heating tube, and the wire is placed in the groove 18. The groove 18 is arranged outside the heating tube. Configuring a heating tube in the bottom die 2 enables the bottom die 2 to reach the required temperature faster, shortens the preheating time, and improves production efficiency. The wire of the heating tube is led out through the groove 18 to prevent the wire from affecting the feeding mechanism.

[0037] In Step 3, during pickling, the ratio of the acidic cleaning agent to water is 1:8. Then the solution is heated to 60 - 65 °C. The aluminum alloy round blank is soaked in the heated solution for 15 minutes and then taken out and rinsed clean. Compared with higher - concentration cleaning agents or more severe cleaning conditions, the pickling process at this ratio and temperature is milder, which helps protect the surface quality of the aluminum alloy blank, avoid scratches and corrosion defects, and reduce the risk of the aluminum alloy absorbing hydrogen during pickling, reducing the occurrence probability of hydrogen embrittlement and improving the mechanical properties of the blank.

[0038] In Step 4, preheat until the surface temperature of the blank reaches 250°C - 260°C. Preheating the aluminum alloy circular blank to 250°C - 260°C can significantly improve the plasticity of the material, improve the fluidity of the metal, reduce the deformation resistance and energy consumption, reduce die wear, optimize the tissue performance, and improve the production efficiency and product quality.

[0039] In Step 5, apply a water-based graphite solution to the aluminum alloy circular blank. The ratio of graphite particles to water is 1:3. After applying evenly, let it stand for 4 - 6 minutes to dry naturally. Applying a water-based graphite solution with a ratio of graphite particles to water of 1:3 evenly to the aluminum alloy circular blank and drying it naturally for 4 - 6 minutes can significantly improve the lubrication performance, improve the fluidity of the metal, prevent adhesion, protect the die, reduce costs, and has the advantages of simple process, environmental friendliness, and high-temperature adaptability.

[0040] In Step 7, heat the bottom die 2 to 280°C - 300°C, and at the same time heat the punching rod 5 to 280°C - 300°C with a professional blowtorch. Aluminum alloy has good plasticity in the temperature range of 280°C - 300°C. Heating the bottom die and the punching rod to the same temperature synchronously can make the metal flow more evenly during extrusion, reduce defects such as insufficient filling, cracks, and folds caused by local temperature differences, and further improve the dimensional accuracy and surface quality of the finished product.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The warm extrusion forming process of the scroll disk is characterized in that It includes the following steps: Step 1: Prepare a horizontal multi-link toggle press with a nominal force stroke of ≥60 mm for the horizontal multi-link toggle press, and manufacture a mold; The mold includes a bottom die and a punch rod; 5-7 sector ejector pins and 5-7 round ejector pins are arranged through the bottom die. The sector ejector pins are located in the middle of the bottom die, and the round ejector pins are located outside the sector ejector pins; the punch rod is installed in the die holder through the punch rod handle. Heating tube holes are arranged on the bottom die, a groove is arranged on the front surface of the bottom die, a heating tube is installed in the heating tube hole, a wire is configured on the heating tube, the wire is arranged in the groove, and the groove is arranged outside the heating tube. Step 2: Manufacture an aluminum alloy circular blank; Saw the aluminum alloy circular blank according to the shape, size, weight and performance parameter requirements of the aluminum alloy scroll disk. The weight of the aluminum alloy circular blank is 0.3-0.5% greater than the actual weight of the scroll disk. Step 3: Pickle to remove oil; pickle the aluminum alloy circular blank to remove oil, and put it into a tunnel oven to dry after cleaning. Step 4: Preheat; put the dried blank into a box furnace for preheating. Step 5: Apply a water-based graphite solution and let it dry. Step 6: Reheat; put the dried aluminum alloy circular blank into the box furnace again and heat it until the surface temperature of the blank reaches 400℃-445℃. Step 7: Heat the mold. Step 8: Spray oil-based graphite; after the mold is heated, evenly spray the oil-based graphite onto the surface of the mold cavity. Stir the oil-based graphite for 4-6 minutes before spraying. Step 9: Warm extrusion forming; use the horizontal multi-link toggle press and the mold to warm-extrude the aluminum alloy circular blank into shape.

2. The warm extrusion forming process of the scroll disk according to claim 1, wherein, In the said Step 1, the bottom die is clamped by a clamping block I. The clamping block I is installed on the machine body through a tension bolt. The bottom die is arranged on a die holder cushion block. The die holder cushion block is arranged inside the machine body. A knockout cushion block is arranged in the die holder cushion block. The sector ejector pin and the round ejector pin are installed on the knockout cushion block. The sector ejector pin and the round ejector pin are arranged through the bottom die; the bottom die and the punch rod cooperate. The punch rod is installed in the clamping block II through the punch rod handle. The clamping block II is installed in the die holder through a die holder nut. A locknut is arranged at the tail of the die holder nut; both the die holder nut and the locknut are screwed and installed at the external thread of the die holder. A punch rod cushion block, multiple adjusting cushion blocks, and a die holder cushion block are sequentially installed in the die holder. The punch rod cushion block abuts against the tail of the punch rod handle.

3. The scroll disk warm extrusion forming process according to claim 1, characterized in that, In Step 3, when pickling, the ratio of the acid cleaning agent to water is 1:8, then heat the solution to 60-65℃, soak the aluminum alloy circular blank in the heated solution for 15 minutes and then take it out and rinse it clean.

4. The scroll disk warm extrusion forming process according to claim 1, characterized in that, In Step 4, preheat to a surface temperature of the blank reaching 250℃-260℃.

5. The scroll disk warm extrusion forming process according to claim 1, characterized in that In Step 5, apply the water-based graphite solution to the aluminum alloy circular blank. The ratio of the graphite particles to water in the water-based graphite solution is 1:

3. After applying it evenly, let it stand for 4-6 minutes to dry naturally.

6. The warm extrusion forming process of the scroll disk according to claim 1, characterized in that, In Step 6, keep the aluminum alloy circular blank in the box furnace for 2 hours after heating and then take it out.

7. The scroll disk warm extrusion forming process according to claim 1, characterized in that, In Step 7, heat the bottom die to 280℃-300℃, and at the same time heat the punch rod to 280℃-300℃ with a blowtorch.

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