Air tightness detection equipment for aluminum alloy hub processing

Abstract

The utility model relates to air tightness detection equipment for aluminum alloy hub processing, which comprises a transverse plate, the upper surface of the transverse plate is fixedly connected with a fixing mechanism, the upper surface of the transverse plate is fixedly connected with a placing plate, and the upper surface of the transverse plate is fixedly connected with a second mounting frame. According to the air tightness detection equipment for aluminum alloy hub processing, the transverse plate, the fixing mechanism, the placement plate, a second mounting frame, a second electric push rod, a third mounting frame, a first circular plate, a connecting column, an elastic rubber cylinder, a first circular hole, a second circular hole, an air distribution assembly, an air inflation pump, a control assembly and other structures are arranged, so that a to-be-detected hub does not need to be soaked in water in the detection process; therefore, after the wheel hub is detected, water cannot be adsorbed on the surface of the wheel hub, so that the subsequent drying treatment procedure is omitted, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy wheel hub testing technology, specifically relating to an airtightness testing device for aluminum alloy wheel hub processing. Background Technology

[0002] Aluminum alloy wheels are widely used in automobiles, motorcycles, and other vehicles due to their advantages such as light weight, high strength, and good heat dissipation. During the manufacturing process of aluminum alloy wheels, airtightness testing is a crucial step, directly affecting the wheel's safety and reliability.

[0003] Existing methods for testing the airtightness of aluminum alloy wheels typically involve inflating the wheel hub with air and then immersing it in water, observing for air bubbles to determine if there is a leak. For example, Chinese Patent Publication No. CN218822993U discloses an airtightness testing device for aluminum alloy wheel hub processing. While this method is simple and easy to implement, the wheel hub absorbs a large amount of water after immersion, requiring subsequent drying, which increases production steps and costs. Summary of the Invention

[0004] The purpose of this invention is to provide an airtightness testing device for aluminum alloy wheel hub processing, so as to solve the problem that the existing testing methods mentioned in the background art require immersing the wheel hub in water, which causes the wheel hub surface to absorb water and makes it difficult to accurately determine the leakage location.

[0005] An airtightness testing device for aluminum alloy wheel hub processing includes a horizontal plate. A fixing mechanism is fixedly connected to the upper surface of the horizontal plate. A placement plate is fixedly connected to the upper surface of the horizontal plate. A second mounting bracket is fixedly connected to the upper surface of the horizontal plate. A second electric push rod is fixedly connected to the top of the inner wall of the second mounting bracket. A third mounting bracket is fixedly connected to the bottom of the second electric push rod. A first circular plate is fixedly connected to the bottom of the third mounting bracket. A connecting column is fixedly connected to the bottom of the first circular plate. A second circular plate is fixedly connected to the bottom of the connecting column. Elastic rubber cylinders are adhered to the bottom of the first circular plate and the upper surface of the second circular plate. A first circular hole is opened inside the first circular plate. A second circular hole is opened inside both the first and second circular plates. An air distribution component is fixedly connected to the inner wall of the first and second circular holes. An air pump is fixedly connected to the upper surface of the first circular plate. The air outlet of the air pump is fixedly connected to the right end of the air distribution component. A control component is fixedly connected to the right side of the second mounting bracket.

[0006] The present invention is further configured such that there are two fixing mechanisms, and the two fixing mechanisms are respectively located on the left and right sides of the placement plate.

[0007] The present invention is further configured such that the fixing mechanism includes a first mounting frame, a first electric push rod, an arc-shaped clamping plate and a first rubber pad, the bottom of the first mounting frame is fixedly connected to the upper surface of the horizontal plate, the bottom of the first electric push rod is fixedly connected to the upper surface of the first mounting frame, one side of the arc-shaped clamping plate is fixedly connected to the end of the first electric push rod, and the other side of the arc-shaped clamping plate is bonded to the side of the first rubber pad.

[0008] The present invention is further configured such that the included angle between the first electric push rod and the cross plate is 15°.

[0009] The present invention is further configured such that the gas distribution assembly includes a five-way pipe, a first solenoid valve, a second solenoid valve, a slide column, a pressure sensor, a fourth mounting bracket, a connecting block, and a third solenoid valve. The inner walls of the first and second circular holes are both fixedly connected to the surface of the five-way pipe. The top ends of the first and second solenoid valves are both fixedly connected to the bottom end of the five-way pipe. The inner wall of the five-way pipe is in contact with the surface of the slide column. The upper surface of the slide column is fixedly connected to the bottom of the pressure sensor. The upper surface of the pressure sensor is fixedly connected to the inner wall of the fourth mounting bracket. The left and right sides of the five-way pipe are both fixedly connected to the sides of the connecting block. The bottom of the fourth mounting bracket is fixedly connected to the upper surface of the connecting block. The right end of the five-way pipe is fixedly connected to the outlet end of the air pump. The left end of the five-way pipe is fixedly connected to the right end of the third solenoid valve.

[0010] The present invention is further configured such that the control component includes a vertical plate, a housing, a controller, a touch screen display, and an alarm; the left side of the vertical plate is fixedly connected to the right side of the second mounting bracket; the front side of the vertical plate is fixedly connected to the back side of the housing; the inner wall of the housing is fixedly connected to the front side of the controller; the back side of the touch screen display is fixedly connected to the front side of the housing; and the bottom of the alarm is fixedly connected to the upper surface of the housing.

[0011] The present invention is further configured such that the placement plate is located in the middle of the horizontal plate, and the axes of the placement plate, the first circular plate and the second circular plate are all coincident.

[0012] The present invention is further configured such that a second rubber pad is adhered to the upper surface of the placement plate, and the axis of the second rubber pad coincides with the axis of the placement plate.

[0013] The present invention is further configured such that a support leg is fixedly connected to the bottom of the horizontal plate, a reinforcing block is fixedly connected to the surface of the support leg, and the upper surface of the reinforcing block is fixedly connected to the bottom of the horizontal plate.

[0014] The technical effects achieved by this invention are as follows:

[0015] The present invention discloses an airtightness testing device for aluminum alloy wheel hub processing. This device comprises a horizontal plate, a fixing mechanism, a placement plate, a second mounting bracket, a second electric push rod, a third mounting bracket, a first circular plate, a connecting column, an elastic rubber cylinder, a first circular hole, a second circular hole, an air distribution component, an air pump, and a control component. This device enables layer-by-layer airtightness testing of the wheel hub under test. During the testing process, the wheel hub does not need to be immersed in water; therefore, the surface of the wheel hub will not absorb water after testing, eliminating the need for subsequent drying processes, improving production efficiency, and reducing production costs.

[0016] The air tightness testing device for aluminum alloy wheel hub processing of the present invention uses an inclined first electric push rod in the fixing mechanism to make two arc-shaped clamping plates clamp the outer peripheral wall of the wheel hub. At the same time, the downward component force generated by the inclined angle makes the bottom of the wheel hub and the second rubber pad form a secondary compression seal. At this time, the air filled into the wheel hub will not leak out from the bottom of the wheel hub, thereby making the test more accurate. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of the present invention.

[0018] Figure 2 This is a top view of the fixing mechanism in this invention.

[0019] Figure 3 This is a top view of the placement plate in this invention.

[0020] Figure 4 This is a top view of the first circular plate in this invention.

[0021] Figure 5 yes Figure 4 Sectional view at point AA.

[0022] Figure 6 This is a top view of the second circular plate in this invention.

[0023] Figure 7 This is a three-dimensional schematic diagram of the elastic rubber cylinder in this invention.

[0024] Figure 8 yes Figure 7 Sectional view at point BB.

[0025] Figure 9 This is a schematic diagram of the gas distribution component in this invention.

[0026] Figure 10 This is a front view of the control component in this invention.

[0027] Figure 11 yes Figure 10 Sectional view at point CC.

[0028] The components represented by each number in the attached diagram are listed below: 1. Horizontal plate; 2. Fixing mechanism; 201. First mounting bracket; 202. First electric push rod; 203. Arc-shaped clamping plate; 204. First rubber pad; 3. Placement plate; 4. Second mounting bracket; 5. Second electric push rod; 6. Third mounting bracket; 7. First circular plate; 8. Connecting column; 9. Second circular plate; 10. Elastic rubber cylinder; 11. First circular hole; 12. Second circular hole; 13. Gas distribution assembly; 1301. 1302. Five-way pipe; 1303. First solenoid valve; 1304. Second solenoid valve; 1305. Sliding column; 1306. Pressure sensor; 1307. Fourth mounting bracket; 1308. Connecting block; 1309. Third solenoid valve; 14. Air pump; 15. Control assembly; 1501. Vertical plate; 1502. Box body; 1503. Controller; 1504. Touch screen display; 1505. Alarm; 16. Second rubber pad; 17. Support leg; 18. Reinforcing block. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] like Figures 1 to 11 As shown, an airtightness testing device for aluminum alloy wheel hub processing includes a horizontal plate 1. A fixing mechanism 2 is fixedly connected to the upper surface of the horizontal plate 1. A placement plate 3 is fixedly connected to the upper surface of the horizontal plate 1. A second mounting bracket 4 is fixedly connected to the upper surface of the horizontal plate 1. A second electric push rod 5 is fixedly connected to the top of the inner wall of the second mounting bracket 4. A third mounting bracket 6 is fixedly connected to the bottom end of the second electric push rod 5. A first circular plate 7 is fixedly connected to the bottom of the third mounting bracket 6. A connecting column 8 is fixedly connected to the bottom of the first circular plate 7. A second circular plate 9 is fixedly connected to the bottom of the connecting column 8. Springs are adhered to the bottom of the first circular plate 7 and the upper surface of the second circular plate 9. The rubber cylinder 10 has a first circular hole 11 inside the first circular plate 7, and a second circular hole 12 inside both the first circular plate 7 and the second circular plate 9. The inner walls of the first circular hole 11 and the second circular hole 12 are fixedly connected to the air distribution component 13. An air pump 14 is fixedly connected to the upper surface of the first circular plate 7. The air outlet of the air pump 14 is fixedly connected to the right end of the air distribution component 13. A control component 15 is fixedly connected to the right side of the second mounting bracket 4. A support leg 17 is fixedly connected to the bottom of the horizontal plate 1. A reinforcing block 18 is fixedly connected to the surface of the support leg 17. The upper surface of the reinforcing block 18 is fixedly connected to the bottom of the horizontal plate 1.

[0032] The placement plate 3 is located in the middle of the horizontal plate 1, and the axes of the placement plate 3, the first circular plate 7, and the second circular plate 9 are all coincident. The upper surface of the placement plate 3 is bonded with a first rubber pad 204, and the axis of the first rubber pad 204 coincides with the axis of the placement plate 3.

[0033] There are two fixing mechanisms 2, and the two fixing mechanisms 2 are located on the left and right sides of the placement plate 3 respectively. The fixing mechanism 2 includes a first mounting bracket 201, a first electric push rod 202, an arc-shaped clamping plate 203 and a first rubber pad 204. The bottom of the first mounting bracket 201 is fixedly connected to the upper surface of the horizontal plate 1. The bottom of the first electric push rod 202 is fixedly connected to the upper surface of the first mounting bracket 201. One side of the arc-shaped clamping plate 203 is fixedly connected to the end of the first electric push rod 202. The other side of the arc-shaped clamping plate 203 is bonded to the side of the first rubber pad 204. The angle between the first electric push rod 202 and the horizontal plate 1 is 15°.

[0034] The gas distribution assembly 13 includes a five-way pipe 1301, a first solenoid valve 1302, a second solenoid valve 1303, a slide bar 1304, a pressure sensor 1305, a fourth mounting bracket 1306, a connecting block 1307, and a third solenoid valve 1308. The inner walls of the first circular hole 11 and the second circular hole 12 are both fixedly connected to the surface of the five-way pipe 1301. The top ends of the first solenoid valve 1302 and the second solenoid valve 1303 are both fixedly connected to the bottom end of the five-way pipe 1301. The inner wall of the five-way pipe 1301 is connected to the slide bar 1304. The surfaces are fitted together, the upper surface of the sliding column 1304 is fixedly connected to the bottom of the pressure sensor 1305, the upper surface of the pressure sensor 1305 is fixedly connected to the inner wall of the fourth mounting bracket 1306, the left and right sides of the five-way pipe 1301 are fixedly connected to the sides of the connecting block 1307, the bottom of the fourth mounting bracket 1306 is fixedly connected to the upper surface of the connecting block 1307, the right end of the five-way pipe 1301 is fixedly connected to the air outlet of the air pump 14, and the left end of the five-way pipe 1301 is fixedly connected to the right end of the third solenoid valve 1308.

[0035] The control assembly 15 includes a vertical plate 1501, a housing 1502, a controller 1503, a touch screen 1504, and an alarm 1505. The left side of the vertical plate 1501 is fixedly connected to the right side of the second mounting bracket 4. The front side of the vertical plate 1501 is fixedly connected to the back side of the housing 1502. The inner wall of the housing 1502 is fixedly connected to the front side of the controller 1503. The back side of the touch screen 1504 is fixedly connected to the front side of the housing 1502. The bottom of the alarm 1505 is fixedly connected to the upper surface of the housing 1502.

[0036] It should be noted that the first electric push rod 202 can control the arc-shaped clamping plate 203 to move left or right. At the same time, through the inclined first electric push rod 202 in the fixing mechanism 2, the two arc-shaped clamping plates 203 clamp the outer peripheral wall of the wheel hub, and the downward component force generated by the inclined angle causes the bottom of the wheel hub to form a secondary compression seal between the bottom of the wheel hub and the second rubber pad 16. At this time, the air filled into the wheel hub will not leak out from the bottom of the wheel hub, thus making the detection more accurate.

[0037] The third mounting bracket 6 can be moved up or down by the second electric push rod 5. The first solenoid valve 1302 is located between the first circular plate 7 and the second circular plate 9, and the second solenoid valve 1303 is located below the second circular plate 9. When the air pump 14 and the first solenoid valve 1302 are open, and the second solenoid valve 1303 and the third solenoid valve 1308 are closed, the air pump 14 can inflate the space between the first circular plate 7 and the second circular plate 9. At this time, the elastic rubber cylinder 10 will deform and fit tightly against the inner wall of the hub. At the same time, the pressure sensor 1305, through the sliding column 1304, will cause the pressure to be adjusted. Force sensor 1305 can monitor the air pressure between the first circular plate 7 and the second circular plate 9. When the air pump 14 and the second solenoid valve 1303 are open, and the first solenoid valve 1302 and the third solenoid valve 1308 are closed, the air pump 14 can inflate the wheel hub. At the same time, through the sliding column 1304 and the pressure sensor 1305, the pressure sensor 1305 can monitor the air pressure inside the wheel hub. When the first solenoid valve 1302, the second solenoid valve 1303 and the third solenoid valve 1308 are all open, the air pressure between the first circular plate 7 and the second circular plate 9 and the air pressure inside the wheel hub are equal to the external air pressure.

[0038] The elastic rubber sleeve 10 is made of hydrogenated nitrile butadiene rubber (HNBR), with a compression set of ≤15% (70℃×22h×25% compression) and a tensile set of ≤20%, and is suitable for wheel hub inner diameter tolerance of ±0.5mm.

[0039] The pressure sensor 1305 is a GE180K, the touch screen display 1504 is a Kunlun Tongtai TPC1021KT, the controller 1503 is a Honeywell PEC8044_PB1_SO, the first electric actuator 202 and the second electric actuator 5 are UD100, the air pump 14 is a GSW320 high-pressure air compressor, the first solenoid valve 1302, the second solenoid valve 1303, and the third solenoid valve 1308 are all ROSS-2771B3001 double valves, the alarm 1505 is a Schneider Electric XB2-BV5LC, and the touch screen display 1504, controller 1503, and first electric actuator 202 are also included. The second electric actuator 5, pressure sensor 1305, air pump 14, first solenoid valve 1302, second solenoid valve 1303, third solenoid valve 1308, and alarm 1505 are powered by a DC24V / AC380V power supply via a switching power supply. Pressure sensor 1305 is connected to the analog input module of controller 1503 via a 4-20mA analog signal. Touchscreen display 1504 communicates with controller 1503 via RS485. The first electric actuator 202, second electric actuator 5, air pump 14, first solenoid valve 1302, second solenoid valve 1303, third solenoid valve 1308, and alarm 1505 are connected to controller 1503 via digital signals. The digital output module, via a touch screen 1504 and a controller 1503, allows for manual or automatic control of the first electric actuator 202, the air pump 14, the first solenoid valve 1302, the second solenoid valve 1303, the third solenoid valve 1308, and the alarm 1505. Simultaneously, when the pressure sensor 1305 detects that the air pressure between the first circular plate 7 and the second circular plate 9 has reached a set value, the controller 1503 automatically closes the first solenoid valve 1302 and the air pump 14 based on the data transmitted by the pressure sensor 1305. This prevents the air pressure between the first circular plate 7 and the second circular plate 9 from changing. When the pressure sensor 1305... After the pressure sensor 1305 detects that the air pressure inside the wheel hub has reached the set value, the controller 1503 can stop the air pump 14 from inflating the wheel hub according to the data transmitted by the pressure sensor 1305. When the first circular plate 7 moves up to a certain height, if the value detected by the pressure sensor 1305 is less than the set value, it indicates that there is a gas leak in this height range. At this time, the controller 1503 can turn on the alarm 1505 according to the data transmitted by the pressure sensor 1305, and remind the inspection personnel that there is a leak in this height range of the wheel hub. If the value detected by the pressure sensor 1305 is equal to the set value, it indicates that there is no leak in this height range.

[0040] The working principle of this invention is as follows: First, the wheel hub is placed on the second rubber pad 16. Then, by operating the touch screen 1504, the first electric push rod 202 is extended, and the two arc-shaped clamping plates 203 on the left and right clamp the wheel hub. At the same time, through the inclined first electric push rod 202 in the fixing mechanism 2, the two arc-shaped clamping plates 203 clamp the outer peripheral wall of the wheel hub, and the downward component force generated by the inclined angle makes the bottom of the wheel hub and the second rubber pad 16 form a secondary compression seal. Furthermore, the first rubber pad 204 on the arc-shaped clamping plate 203 makes the wheel hub more firmly fixed.

[0041] Then, by operating the touch screen 1504, the second electric push rod 5 is extended and the second circular plate 9 is lowered to a suitable height. Then, by operating the touch screen 1504, the first solenoid valve 1302 and the air pump 14 are opened, and the second solenoid valve 1303 and the third solenoid valve 1308 are closed. At this time, the air pump 14 can inflate the space between the first circular plate 7 and the second circular plate 9, causing the elastic rubber cylinder 10 to deform. At the same time, through the sliding column 1304 and the pressure sensor 1305, the pressure sensor 1305 can monitor the air pressure between the first circular plate 7 and the second circular plate 9. When the value monitored by the pressure sensor 1305 reaches the set value, the controller 1503 automatically closes the first solenoid valve 1302 and the air pump 14 according to the data transmitted by the pressure sensor 1305. At this time, the deformed elastic rubber cylinder 10 is tightly fitted to the inner wall of the wheel hub.

[0042] Then, by operating the touch screen 1504, the second solenoid valve 1303 and the air pump 14 are opened, and the first solenoid valve 1302 and the third solenoid valve 1308 are closed. At this time, since the elastic rubber cylinder 10 is tightly attached to the inner wall of the wheel hub, the air pump 14 can inflate the wheel hub. At the same time, through the slide column 1304 and the pressure sensor 1305, the pressure sensor 1305 can monitor the air pressure in the wheel hub. When the value monitored by the pressure sensor 1305 reaches the set value, the controller 1503 automatically shuts off the air pump 14 according to the data transmitted by the pressure sensor 1305.

[0043] Then, the controller 1503 automatically controls the second electric push rod 5 to contract. During the contraction of the second electric push rod 5, the pressure sensor 1305 continuously monitors the air pressure inside the wheel hub. When the first circular plate 7 moves up to a certain height, if the value monitored by the pressure sensor 1305 at this time is less than the set specified value, it indicates that there is air leakage in this height range. At this time, the controller 1503 can open the alarm 1505 according to the data transmitted by the pressure sensor 1305, and remind the detection personnel through the opened alarm 1505 that there is a leakage point in this height range of the wheel hub. At the same time, the second electric push rod 5 stops contracting. If the value monitored by the pressure sensor 1305 at this time is equal to the set specified value, it indicates that there is no leakage point in this height range. At the same time, the second electric push rod 5 continues to contract until the length of the second electric push rod 5 contracts to the set length.

[0044] After the wheel hub is detected, by operating the touch display screen 1504, the first solenoid valve 1302, the second solenoid valve 1303 and the third solenoid valve 1308 are all opened. At this time, the air pressure between the first circular plate 7 and the second circular plate 9 and the air pressure inside the wheel hub are both equal to the external air pressure. At the same time, the controller 1503 controls the second electric push rod 5 to contract, so that the second circular plate 9 moves up to the initial position, and the controller 1503 controls the first electric push rod 202 to contract, so that the two arc-shaped clamping plates 203 return to the initial position. At this time, the wheel hub can be taken away from the placement plate 3.

[0045] Experimental data:

[0046] 1. Detection efficiency comparison:

[0047] Leakage location accuracy verification:

[0048] Test conditions: A leakage hole with a diameter of φ0.2mm is prefabricated on the inner wall of the wheel hub (random position), and the inflation pressure is 2.0MPa.

[0049] Test results: The positioning error of the device of the present invention is ≤±3mm, while the water immersion method cannot locate, and the positioning error of the helium mass spectrometry method is ±15mm. <00ffff119>Durability test:

[0051] Test method: Continuously detect 10,000 times (pressure cycle 1.5 - 2.5MPa).

[0052] Results: The hardness change of the elastic rubber cylinder 10 is ≤5 Shore A, and the sealing performance does not decrease, meeting the GB / T1690 - 2010 standard.

[0053] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An airtightness testing device for aluminum alloy wheel hub processing, characterized in that: Includes a horizontal plate (1), a fixing mechanism (2) fixedly connected to the upper surface of the horizontal plate (1), a placement plate (3) fixedly connected to the upper surface of the horizontal plate (1), a second mounting bracket (4) fixedly connected to the upper surface of the horizontal plate (1), a second electric push rod (5) fixedly connected to the top of the inner wall of the second mounting bracket (4), a third mounting bracket (6) fixedly connected to the bottom end of the second electric push rod (5), a first circular plate (7) fixedly connected to the bottom of the third mounting bracket (6), a connecting column (8) fixedly connected to the bottom of the first circular plate (7), and a second circular plate (9) fixedly connected to the bottom of the connecting column (8). Elastic rubber cylinders (10) are bonded to the bottom of the circular plate (7) and the upper surface of the second circular plate (9). A first circular hole (11) is opened inside the first circular plate (7). A second circular hole (12) is opened inside the first circular plate (7) and the second circular plate (9). A gas distribution component (13) is fixedly connected to the inner wall of the first circular hole (11) and the inner wall of the second circular hole (12). An air pump (14) is fixedly connected to the upper surface of the first circular plate (7). The air outlet of the air pump (14) is fixedly connected to the right end of the gas distribution component (13). A control component (15) is fixedly connected to the right side of the second mounting bracket (4).

2. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The number of fixing mechanisms (2) is two, and the two fixing mechanisms (2) are located on the left and right sides of the placement plate (3) respectively.

3. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The fixing mechanism (2) includes a first mounting bracket (201), a first electric push rod (202), an arc-shaped clamp (203), and a first rubber pad (204). The bottom of the first mounting bracket (201) is fixedly connected to the upper surface of the horizontal plate (1), the bottom of the first electric push rod (202) is fixedly connected to the upper surface of the first mounting bracket (201), one side of the arc-shaped clamp (203) is fixedly connected to the end of the first electric push rod (202), and the other side of the arc-shaped clamp (203) is bonded to the side of the first rubber pad (204).

4. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 3, characterized in that: The angle between the first electric push rod (202) and the horizontal plate (1) is 15°.

5. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The gas distribution assembly (13) includes a five-way pipe (1301), a first solenoid valve (1302), a second solenoid valve (1303), a slide bar (1304), a pressure sensor (1305), a fourth mounting bracket (1306), a connecting block (1307), and a third solenoid valve (1308). The inner walls of the first circular hole (11) and the second circular hole (12) are fixedly connected to the surface of the five-way pipe (1301). The top ends of the first solenoid valve (1302) and the second solenoid valve (1303) are fixedly connected to the bottom end of the five-way pipe (1301). The inner wall of the five-way pipe (1301) is connected to the slide bar (1308). 04) Surface fitting, the upper surface of the sliding column (1304) is fixedly connected to the bottom of the pressure sensor (1305), the upper surface of the pressure sensor (1305) is fixedly connected to the inner wall of the fourth mounting bracket (1306), the left and right sides of the five-way pipe (1301) are fixedly connected to the side of the connecting block (1307), the bottom of the fourth mounting bracket (1306) is fixedly connected to the upper surface of the connecting block (1307), the right end of the five-way pipe (1301) is fixedly connected to the air outlet of the air pump (14), and the left end of the five-way pipe (1301) is fixedly connected to the right end of the third solenoid valve (1308).

6. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The control component (15) includes a vertical plate (1501), a housing (1502), a controller (1503), a touch screen (1504), and an alarm (1505). The left side of the vertical plate (1501) is fixedly connected to the right side of the second mounting bracket (4). The front of the vertical plate (1501) is fixedly connected to the back of the housing (1502). The inner wall of the housing (1502) is fixedly connected to the front of the controller (1503). The back of the touch screen (1504) is fixedly connected to the front of the housing (1502). The bottom of the alarm (1505) is fixedly connected to the upper surface of the housing (1502).

7. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The placement plate (3) is located in the middle of the horizontal plate (1), and the axes of the placement plate (3), the first circular plate (7), and the second circular plate (9) all coincide.

8. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The upper surface of the placement plate (3) is bonded with a second rubber pad (16), and the axis of the second rubber pad (16) coincides with the axis of the placement plate (3).

9. The airtightness testing equipment for aluminum alloy wheel hub processing according to claim 1, characterized in that: The bottom of the horizontal plate (1) is fixedly connected to a support leg (17), and the surface of the support leg (17) is fixedly connected to a reinforcing block (18). The upper surface of the reinforcing block (18) is fixedly connected to the bottom of the horizontal plate (1).

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