A pneumatic supercharging system and supercharging method for wheel hub supercharging casting

Abstract

The present invention relates to the field of pressure casting technology, and discloses a gas pressure boosting system for wheel hub boost casting, including a first gas compression mechanism and a second gas compression mechanism, wherein the first gas compression mechanism includes a first cylinder body, and a turntable is provided in the first cylinder body, the turntable is provided with a plurality of blades, and one end of the blade is elastically connected to the turntable through a first rebound spring, and a first drive motor for driving the turntable to rotate is provided on one side of the first cylinder body. The present invention is provided with a second fixed plate with a plurality of gas compression cylinders, and correspondingly, a first fixed plate with extrusion heads of different sizes used in conjunction with the second fixed plate is also provided, and different compression rates of gas can be obtained by using extrusion heads of different sizes in conjunction with gas compression cylinders, thereby being able to meet different air pressure requirements of different equipment, and being more convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of pressure casting, and in particular to a pneumatic supercharging system and a supercharging method for wheel hub supercharging casting. Background Art

[0002] The forming processes of aluminum alloy wheels include gravity casting and pressure casting. Gravity casting is a process in which liquid metal is poured into a metal mold under the action of its own gravity and solidified under gravity. Its advantages are that the equipment and process are relatively simple and the mold cost is low. However, gravity casting has a large thermal conductivity and poor filling capacity, and the product is prone to defects such as pinholes, pores, oxidation slag inclusions, thermal cracks, and looseness. Pressure casting is to apply external pressure to the casting during filling and solidification to reduce the gas inside the aluminum alloy liquid, fill the mold or compensate for shrinkage under higher pressure, and improve the density of the aluminum alloy organization, thereby reducing the defects of the casting and improving the air tightness of the casting. Commonly used technical means: first vacuum the casting equipment, then send the metal liquid into the casting equipment, and then flush the high-pressure inert gas into the casting equipment to achieve the purpose of applying external pressure to the casting.

[0003] The gas boosting system for aluminum alloy wheel casting has the following characteristics: 1. Compared with other gas-using equipment, pressure casting only requires high-pressure gas during filling and solidification. In the entire casting process, the proportion of time period requiring high-pressure gas is relatively small; 2. Workpieces of different specifications require different air pressures due to different molding cavities. Therefore, when in use, in order to meet the needs of different air pressures, each casting equipment must be equipped with an air compressor for air supply; 3. Since the workpiece is more sensitive to temperature changes during the casting process, there are also more stringent requirements for high-pressure gas. The existing gas boosting equipment cannot meet multiple air pressure requirements at the same time, and cannot adjust the temperature of the gas when compressing the gas, and cannot meet the needs of wheel casting. Summary of the invention

[0004] The present invention provides an air pressure boosting system and a boosting method for wheel hub pressure casting, which have the beneficial effects of being able to meet a variety of air pressure requirements and being able to adjust the gas temperature when compressing the gas, and solves the problem mentioned in the above background technology that the existing gas boosting equipment cannot meet a variety of air pressure requirements at the same time, cannot adjust the gas temperature when compressing the gas, and cannot meet the needs of wheel hub casting.

[0005] The present invention provides the following technical solution: a gas pressure boosting system for wheel hub boost casting, comprising a first gas compression mechanism and a second gas compression mechanism, characterized in that: the first gas compression mechanism comprises a first cylinder, and a turntable is provided in the first cylinder, a plurality of blades are provided on the turntable, and one end of the blade is elastically connected to the turntable through a first rebound spring, and a first driving motor for driving the turntable to rotate is provided on one side of the first cylinder;

[0006] The second gas compression mechanism includes a second cylinder body, and a second piston is arranged in the second cylinder body, a first fixed plate is arranged on one side of the second piston, and the second piston is elastically connected to the first fixed plate through a second rebound spring, a plurality of extrusion heads of different sizes are arranged on the first fixed plate, and the extrusion heads are slidably connected to the second piston, an air inlet is arranged in the middle of the second cylinder body, and the air inlet is connected to the first cylinder body through a pipeline, and a hydraulic cylinder for pushing the first fixed plate to move is arranged on one side of the second cylinder body.

[0007] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, a second fixed plate is provided in the second cylinder body, and a plurality of gas compression cylinders are provided on the second fixed plate, and the positions and quantities of the gas compression cylinders correspond one-to-one to the extrusion head.

[0008] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, one end of the gas compression cylinder is detachably connected to the second fixed plate through a threaded groove, and an adjustment block is provided on the inner side of the gas compression cylinder, the adjustment block is slidably connected to the gas compression cylinder, and a connecting rod is provided on the adjustment block, and a sleeve that fits with the connecting rod is provided at one end of the gas compression cylinder away from the second fixed plate, and an adjustment bolt for limiting the connecting rod is provided on the sleeve.

[0009] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, wherein: the gas compression cylinder is provided with an exhaust pipe, the adjusting block is provided with a vent hole, and a plug is provided at the vent hole, the plug is elastically connected to the adjusting block through a first return spring, and the extrusion head is provided with a protrusion opposite to the position of the plug.

[0010] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, wherein: a thermal liquid storage seat is provided in the middle of the second fixed plate, and a third piston is provided in the thermal liquid storage seat, the third piston is elastically connected to the thermal liquid storage seat through a second return spring, the second piston is provided with a head whose position corresponds to the third piston, a liquid inlet is provided on one side of the thermal liquid storage seat, and a plurality of first flow channels are arranged around the thermal liquid storage seat.

[0011] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, the second fixed plate is a hollow structure, and an annular confluence groove is provided in the second fixed plate, a plurality of second flow channels are provided in the middle of the second fixed plate, one end of the second flow channel is connected to the annular confluence groove, and the other end of the second flow channel is connected to the first flow channel, a first return pipe is provided on the second cylinder body, and one end of the first return pipe is connected to the annular confluence groove.

[0012] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, a coolant storage chamber is provided in the middle of the first fixed plate, and a third piston is provided in the coolant storage chamber, a piston rod is provided on the side of the first fixed plate close to the second piston, and one end of the piston rod is fixedly connected to the third piston.

[0013] As an optional solution of the air pressure boosting system for wheel hub supercharged casting described in the present invention, the extrusion head is cylindrical, and a U-shaped flow channel is provided in the extrusion head, a second return pipe is provided at one end of the U-shaped flow channel, and the other end of the U-shaped flow channel is connected to the coolant storage chamber.

[0014] As an optional solution of the pneumatic supercharging system for wheel hub supercharging casting described in the present invention, wherein: the first cylinder body is provided with a first air inlet nozzle and a first air outlet nozzle, and the first air inlet nozzle and the first air outlet nozzle are both provided with a one-way valve.

[0015] The present invention also discloses a method for supercharging a pneumatic supercharging system for supercharging a wheel hub, comprising the following steps:

[0016] S1, connecting the inert gas storage tank to the first gas inlet nozzle of the first gas compression mechanism through a pipeline, and preliminarily compressing the inert gas through the first gas compression mechanism;

[0017] S2, the inert gas after preliminary compression enters the second gas compression mechanism, and the second gas compression mechanism can compress the preliminary compressed gas in different chambers, thereby obtaining compressed gas of different pressures in a compression process;

[0018] S3, passing the heat transfer oil into the first fixed plate and the second fixed plate, and adjusting the temperature of the gas in the second cylinder through the first fixed plate and the second fixed plate.

[0019] The present invention has the following beneficial effects:

[0020] 1. A pneumatic supercharging system and supercharging method for wheel hub supercharging casting, by setting a second gas compression mechanism, which includes a second cylinder body. When the gas enters the second cylinder body, the hydraulic cylinder works to push the second piston and the first fixed plate toward the second fixed plate. In this process, the gas can be further compressed by the moving second piston. A plurality of gas compression cylinders are arranged on the second fixed plate. When the second piston fits the second fixed plate, the gas between the second piston and the second fixed plate will be pressed into the gas compression cylinder. At this time, the hydraulic cylinder continues to push the first fixed plate, and the first fixed plate continues to move against the resistance of the second rebound spring. At this time, under the push of the first fixed plate, the extrusion head slides relative to the second piston and is inserted into the gas compression cylinder. In this device, the extrusion head has different lengths. The longer the extrusion head is, the greater the amplitude of insertion into the gas compression cylinder is. The gas in the gas compression cylinder here will be more compressed, and vice versa.

[0021] The present invention is provided with a second fixed plate with a plurality of gas compression cylinders, and correspondingly, a first fixed plate with extrusion heads of different sizes used in conjunction with the first fixed plate is also provided. The second piston is elastically connected to the first fixed plate, and the second piston is simultaneously pushed to move during the process of pushing the first fixed plate to move. The air can be further compressed by the second piston. By using extrusion heads of different sizes in conjunction with the gas compression cylinders, gases with different compression rates can be obtained, thereby being able to meet the different air pressure requirements of different equipment, and being more convenient to use.

[0022] 2. A pneumatic supercharging system and a supercharging method for wheel hub supercharging casting, by providing a second fixed plate with a thermal liquid storage seat, a plurality of second flow channels are provided on the second fixed plate, and correspondingly, a first flow channel connected to the second flow channel is provided on the thermal liquid storage seat, and the heated thermal oil enters the thermal liquid storage seat through the liquid inlet, and then enters the annular confluence groove through the first flow channel and the second flow channel, and finally flows out through the first reflux pipe. In order to improve the heat exchange effect, the present invention provides a third piston at the thermal liquid storage seat, and when the second piston is fitted with the second fixed plate, the top head contacts the third piston, and the third piston is retracted into the thermal liquid storage seat under the push of the top head, thereby prompting the thermal oil in the thermal liquid storage seat to flow rapidly in the first flow channel and the second flow channel, and the heat exchange effect is better.

[0023] 3. A pneumatic boosting system and a boosting method for wheel hub boost casting, by providing an extrusion head with a U-shaped flow channel, correspondingly, a coolant storage chamber is provided in the middle of the first fixed plate, and when in use, the coolant storage chamber is externally connected to a cooling pipe, and after the coolant enters the coolant storage chamber, it enters the U-shaped flow channel and then flows away through the second return pipe, a piston rod is provided on the side of the first fixed plate close to the second piston, and one end of the piston rod is fixedly connected to the third piston in the coolant storage chamber, and when the second piston is fitted with the second fixed plate, the first fixed plate continues to move, and during this process, the piston rod conflicts with the second piston, and the third piston moves in the coolant storage chamber, and the liquid in the coolant storage chamber can be prompted to quickly flow into the U-shaped flow channel through the third piston, so that the heat exchange effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the first gas compression mechanism of the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the second cylinder body of the present invention.

[0027] Figure 4 It is a cross-sectional view of the second cylinder body of the present invention.

[0028] Figure 5 It is a schematic diagram of the internal structure of the gas compression cylinder of the present invention.

[0029] Figure 6 It is a schematic diagram of the structure of the second piston and the first fixed plate of the present invention.

[0030] Figure 7 It is a schematic diagram of the internal structure of the second fixing plate of the present invention.

[0031] Figure 8 For the present invention Figure 4 A schematic diagram of the enlarged structure in the middle.

[0032] In the figure: 1, first cylinder body; 101, first air inlet nozzle; 102, first air outlet nozzle; 2, turntable; 3, blade; 4, first rebound spring; 5, first drive motor; 6, second cylinder body; 7, second piston; 701, top head; 8, first fixing plate; 801, coolant storage chamber; 802, third piston; 803, piston rod; 9, second rebound spring; 10, extrusion head; 1001, protrusion; 1002, U-shaped flow channel; 11, hydraulic cylinder; 1 2. Second fixed plate; 13. Gas compression cylinder; 14. Adjusting block; 15. Connecting rod; 16. Sleeve; 17. Adjusting bolt; 18. Exhaust pipe; 19. Air vent; 20. Plug; 21. First return spring; 22. Thermal liquid storage seat; 2201. Liquid inlet; 2202. First flow channel; 23. Annular confluence groove; 24. Second flow channel; 25. First return pipe; 26. Second return pipe; 27. Third piston; 28. Second return spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] See also Figures 1 to 8 The present invention discloses a gas pressure boosting system for wheel hub supercharging casting, comprising a first gas compression mechanism and a second gas compression mechanism, wherein the first gas compression mechanism comprises a first cylinder body 1, and a turntable 2 is arranged in the first cylinder body 1, and a plurality of blades 3 are arranged on the turntable 2, and one end of the blade 3 is elastically connected to the turntable 2 through a first rebound spring 4, and a first driving motor 5 for driving the turntable 2 to rotate is arranged on one side of the first cylinder body 1;

[0036] The second gas compression mechanism includes a second cylinder body 6, and a second piston 7 is arranged in the second cylinder body 6, a first fixed plate 8 is arranged on one side of the second piston 7, and the second piston 7 and the first fixed plate 8 are elastically connected by a second rebound spring 9, a plurality of extrusion heads 10 of different sizes are arranged on the first fixed plate 8, and the extrusion head 10 is slidably connected to the second piston 7, an air inlet is arranged in the middle of the second cylinder body 6, and the air inlet is connected to the first cylinder body 1 through a pipeline, and a hydraulic cylinder 11 for pushing the first fixed plate 8 to move is arranged on one side of the second cylinder body 6.

[0037] The first gas compression mechanism includes a first cylinder body 1, in which a turntable 2 is eccentrically arranged, and a retractable blade 3 is arranged on the turntable 2. During the rotation of the turntable 2, one end of the blade is always in close contact with the inner wall of the first cylinder body 1. Since the turntable 2 is eccentrically arranged in the first cylinder body 1, the space between the blades 3 will periodically increase or decrease with the rotation of the turntable 2. When the space between the blades 3 is the largest, the gas enters the first cylinder body 1 through the first air inlet nozzle 101. When the space between the blades 3 is the smallest, the air in the first cylinder body 1 is discharged through the first air outlet nozzle 102. In this way, the preliminary compression of the air can be completed with the rotation of the turntable 2.

[0038] When the gas enters the second cylinder body 6, the hydraulic cylinder 11 works to push the second piston 7 and the first fixed plate 8 toward the second fixed plate 12. In this process, the gas can be further compressed by the moving second piston 7. A plurality of gas compression cylinders 13 are provided on the second fixed plate 12. When the second piston 7 fits the second fixed plate 12, the gas between the second piston 7 and the second fixed plate 12 will be pressed into the gas compression cylinder 13. At this time, the hydraulic cylinder 11 continues to push the first fixed plate 8, and the first fixed plate 8 continues to move against the resistance of the second rebound spring 9. At this time, under the push of the first fixed plate 8, the extrusion head 10 slides relative to the second piston 7 and is inserted into the gas compression cylinder 13. In the present device, the extrusion head 10 has different lengths. The longer the extrusion head 10 is, the greater the amplitude of insertion into the gas compression cylinder 13 is. The gas in the gas compression cylinder 13 here will be more compressed, and vice versa.

[0039] The present invention is provided with a second fixed plate 12 with a plurality of gas compression cylinders 13, and correspondingly, a first fixed plate 8 with extrusion heads 10 of different sizes used in conjunction therewith is also provided. A second piston 7 is elastically connected to the first fixed plate 8. In the process of pushing the first fixed plate 8 to move, the second piston 7 is also pushed to move. The air can be further compressed by the second piston 7. By using extrusion heads 10 of different sizes in conjunction with the gas compression cylinders 13, gases with different compression rates can be obtained, thereby being able to meet the different air pressure requirements of different equipment and being more convenient to use.

[0040] Embodiment 2

[0041] This embodiment is an explanation based on the embodiment 1. For details, please refer to Figures 1 to 8 A second fixing plate 12 is provided in the second cylinder body 6 , and a plurality of gas compression cylinders 13 are provided on the second fixing plate 12 , and the positions and the number of the gas compression cylinders 13 correspond one to one with the extrusion head 10 .

[0042] One end of the gas compression cylinder 13 is detachably connected to the second fixed plate 12 through a threaded groove, and an adjusting block 14 is provided on the inner side of the gas compression cylinder 13. The adjusting block 14 is slidably connected to the gas compression cylinder 13, and a connecting rod 15 is provided on the adjusting block 14. One end of the gas compression cylinder 13 away from the second fixed plate 12 is provided with a sleeve 16 that fits with the connecting rod 15, and the sleeve 16 is provided with an adjusting bolt 17 for limiting the connecting rod 15.

[0043] The gas compression cylinder 13 is provided with an exhaust pipe 18, the adjusting block 14 is provided with a vent hole 19, and a plug 20 is provided at the vent hole 19. The plug 20 is elastically connected to the adjusting block 14 through a first return spring 21, and the extrusion head 10 is provided with a protrusion 1001 opposite to the plug 20.

[0044] A thermal liquid storage seat 22 is provided in the middle of the second fixed plate 12, and a third piston 27 is provided in the thermal liquid storage seat 22. The third piston 27 is elastically connected to the thermal liquid storage seat 22 through a second return spring 28. A pin 701 is provided on the second piston 7, and a position corresponding to the third piston 27. A liquid inlet 2201 is provided on one side of the thermal liquid storage seat 22, and a plurality of first flow channels 2202 are arranged around the thermal liquid storage seat 22.

[0045] The second fixed plate 12 is a hollow structure, and an annular confluence groove 23 is provided in the second fixed plate 12. A plurality of second flow channels 24 are provided in the middle of the second fixed plate 12. One end of the second flow channel 24 is connected to the annular confluence groove 23, and the other end of the second flow channel 24 is connected to the first flow channel 2202. A first return pipe 25 is provided on the second cylinder body 6, and one end of the first return pipe 25 is connected to the annular confluence groove 23.

[0046] An adjustable block 14 is provided on the inner side of the gas compression cylinder 13. By adjusting the position of the adjusting block 14, the volume of the gas compression cylinder 13 can be adjusted. Specifically, the adjusting bolt 17 is screwed with the sleeve 16. The connecting rod 15 and the adjusting block 14 can be adjusted by loosening the adjusting bolt 17. After the adjustment is completed, the adjusting bolt 17 can be tightened.

[0047] In order to be able to adjust the temperature of the gas, a thermal liquid storage seat 22 is arranged in the middle of the second fixed plate 12, and a plurality of second flow channels 24 are arranged on the second fixed plate 12. Correspondingly, a first flow channel 2202 connected to the second flow channel 24 is provided in the thermal liquid storage seat 22. The heated thermal oil enters the thermal liquid storage seat 22 through the liquid inlet 2201, then enters the annular confluence groove 23 through the first flow channel 2202 and the second flow channel 24, and finally flows out through the first reflux pipe 25. In order to improve the heat exchange effect, the present invention provides a third piston 27 at the thermal liquid storage seat 22. When the second piston 7 is fitted with the second fixed plate 12, the top head 701 contacts the third piston 27. Under the push of the top head 701, the third piston 27 retracts into the thermal liquid storage seat 22, thereby prompting the thermal oil in the thermal liquid storage seat 22 to flow quickly in the first flow channel 2202 and the second flow channel 24, thereby achieving a better heat exchange effect.

[0048] Embodiment 3

[0049] This embodiment is an explanation made on the basis of Embodiment 1. A coolant storage chamber 801 is provided in the middle of the first fixed plate 8, and a third piston 802 is provided in the coolant storage chamber 801. A piston rod 803 is provided on the side of the first fixed plate 8 close to the second piston 7, and one end of the piston rod 803 is fixedly connected to the third piston 802.

[0050] The extrusion head 10 is cylindrical, and a U-shaped flow channel 1002 is provided inside the extrusion head 10 . A second return pipe 26 is provided at one end of the U-shaped flow channel 1002 , and the other end of the U-shaped flow channel 1002 is connected to the coolant storage chamber 801 .

[0051] The first cylinder body 1 is provided with a first air inlet nozzle 101 and a first air outlet nozzle 102 , and both the first air inlet nozzle 101 and the first air outlet nozzle 102 are provided with a one-way valve.

[0052] In order to further improve the heat exchange effect of the gas, the present invention is provided with a U-shaped flow channel 1002 at the extrusion head 10, and correspondingly, a coolant storage chamber 801 is provided in the middle of the first fixed plate 8. When in use, the coolant storage chamber 801 is externally connected to a cooling pipe. After the coolant enters the coolant storage chamber 801, it enters the U-shaped flow channel 1002 and then flows away through the second return pipe 26. A piston rod 803 is provided on the side of the first fixed plate 8 close to the second piston 7, and one end of the piston rod 803 is fixedly connected to the third piston 802 in the coolant storage chamber 801. When the second piston 7 is fitted with the second fixed plate 12, the first fixed plate 8 continues to move. During this process, the piston rod 803 conflicts with the second piston 7, and the third piston 802 moves in the coolant storage chamber 801. The third piston 802 can cause the liquid in the coolant storage chamber 801 to quickly flow into the U-shaped flow channel 1002, and the heat exchange effect is better.

[0053] A vent hole 19 is provided on the adjusting block 14, and correspondingly, a protrusion 1001 is provided on the extrusion head 10 opposite to the plug 20. After the extrusion head 10 is inserted into the gas compression cylinder 13, it can stay for a short period of time. After sufficient heat exchange, the extrusion head 10 continues to move until the protrusion 1001 conflicts with the plug 20. As the plug 20 moves, the compressed gas can enter the exhaust pipe 18 through the vent hole 19 and then be discharged through the exhaust pipe 18.

[0054] A method for supercharging a pneumatic supercharging system for supercharging a wheel hub comprises the following steps:

[0055] S1, connecting the inert gas storage tank to the first gas inlet nozzle 101 of the first gas compression mechanism through a pipeline, and preliminarily compressing the inert gas through the first gas compression mechanism;

[0056] S2, the inert gas after preliminary compression enters the second gas compression mechanism, and the second gas compression mechanism can compress the preliminary compressed gas in different chambers, thereby obtaining compressed gas of different pressures in a compression process;

[0057] S3, passing the heat transfer oil into the first fixing plate 8 and the second fixing plate 12, and adjusting the temperature of the gas in the second cylinder 6 through the first fixing plate 8 and the second fixing plate 12.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gas pressure boosting system for wheel hub pressure casting, comprising a first gas compression mechanism and a second gas compression mechanism, characterized in that: The first gas compression mechanism comprises a first cylinder (1), wherein a rotating disk (2) is arranged in the first cylinder (1), a plurality of blades (3) are arranged on the rotating disk (2), and one end of the blade (3) is elastically connected to the rotating disk (2) via a first rebound spring (4), and a first driving motor (5) for driving the rotating disk (2) to rotate is arranged on one side of the first cylinder (1); The second gas compression mechanism comprises a second cylinder body (6), and a second piston (7) is arranged in the second cylinder body (6), a first fixed plate (8) is arranged on one side of the second piston (7), and the second piston (7) and the first fixed plate (8) are elastically connected via a second rebound spring (9), a plurality of extrusion heads (10) of different sizes are arranged on the first fixed plate (8), and the extrusion heads (10) are slidably connected to the second piston (7), an air inlet is arranged in the middle of the second cylinder body (6), and the air inlet is connected to the first cylinder body (1) via a pipeline, and a hydraulic cylinder (11) for pushing the first fixed plate (8) to move is arranged on one side of the second cylinder body (6); A second fixing plate (12) is provided inside the second cylinder body (6), and a plurality of gas compression cylinders (13) are provided on the second fixing plate (12), and the positions and numbers of the gas compression cylinders (13) correspond one-to-one to the extrusion head (10); One end of the gas compression cylinder (13) is detachably connected to the second fixing plate (12) via a threaded groove, and an adjusting block (14) is provided on the inner side of the gas compression cylinder (13), the adjusting block (14) is slidably connected to the gas compression cylinder (13), and a connecting rod (15) is provided on the adjusting block (14), and a sleeve (16) matching with the connecting rod (15) is provided on the end of the gas compression cylinder (13) away from the second fixing plate (12), and an adjusting bolt (17) for limiting the connecting rod (15) is provided on the sleeve (16); The gas compression cylinder (13) is provided with an exhaust pipe (18), the adjustment block (14) is provided with a vent hole (19), and a plug (20) is provided at the vent hole (19), the plug (20) is elastically connected to the adjustment block (14) via a first return spring (21), and the extrusion head (10) is provided with a protrusion (1001) opposite to the plug (20).

2. The pneumatic supercharging system for wheel hub supercharging casting according to claim 1, characterized in that: A thermal liquid storage seat (22) is provided in the middle of the second fixed plate (12), and a third piston (27) is provided in the thermal liquid storage seat (22); the third piston (27) is elastically connected to the thermal liquid storage seat (22) via a second return spring (28); a top head (701) is provided on the second piston (7) and the position corresponds to the third piston (27); a liquid inlet (2201) is provided on one side of the thermal liquid storage seat (22), and a plurality of first flow channels (2202) are arranged around the thermal liquid storage seat (22).

3. The pneumatic supercharging system for wheel hub supercharging casting according to claim 2, characterized in that: The second fixed plate (12) is a hollow structure, and an annular confluence groove (23) is provided in the second fixed plate (12), a plurality of second flow channels (24) are provided in the middle of the second fixed plate (12), one end of the second flow channel (24) is connected to the annular confluence groove (23), and the other end of the second flow channel (24) is connected to the first flow channel (2202), and a first return pipe (25) is provided on the second cylinder body (6), and one end of the first return pipe (25) is connected to the annular confluence groove (23).

4. The pneumatic supercharging system for wheel hub supercharging casting according to claim 3, characterized in that: A coolant storage chamber (801) is provided in the middle of the first fixed plate (8), and a third piston (802) is provided in the coolant storage chamber (801); a piston rod (803) is provided on the side of the first fixed plate (8) close to the second piston (7), and one end of the piston rod (803) is fixedly connected to the third piston (802).

5. The pneumatic supercharging system for wheel hub supercharging casting according to claim 4, characterized in that: The extrusion head (10) is cylindrical, and a U-shaped flow channel (1002) is provided inside the extrusion head (10), a second return pipe (26) is provided at one end of the U-shaped flow channel (1002), and the other end of the U-shaped flow channel (1002) is connected to the coolant storage chamber (801).

6. The pneumatic supercharging system for wheel hub supercharging casting according to claim 5, characterized in that: The first cylinder body (1) is provided with a first air inlet nozzle (101) and a first air outlet nozzle (102), and both the first air inlet nozzle (101) and the first air outlet nozzle (102) are provided with a one-way valve.

7. The method for supercharging a pneumatic supercharging system for supercharging wheel hub according to claim 6, characterized in that: The steps include: S1, connecting the inert gas storage tank to the first gas inlet nozzle (101) of the first gas compression mechanism through a pipeline, and preliminarily compressing the inert gas through the first gas compression mechanism; S2, the inert gas after preliminary compression enters the second gas compression mechanism, and the second gas compression mechanism can compress the preliminary compressed gas in different chambers, thereby obtaining compressed gas of different pressures in a compression process; S3, passing the heat transfer oil into the first fixed plate (8) and the second fixed plate (12), and adjusting the temperature of the gas in the second cylinder (6) through the first fixed plate (8) and the second fixed plate (12).

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