A welding fixture for a vacuum pump impeller

Abstract

The present application belongs to the technical field of vacuum pump impeller processing, and discloses a vacuum pump impeller welding fixture, including: an operating table, an equidistant adjustment mechanism, a wheel clamping mechanism, a blade clamping and transposition mechanism, a blade height adjustment mechanism, a linkage mechanism, a welding mechanism and a pressure testing mechanism, wherein the equidistant adjustment mechanism is arranged on the top of the operating table, the wheel clamping mechanism is arranged on the equidistant adjustment mechanism, the blade clamping and transposition mechanism is arranged above the operating table, the blade height adjustment mechanism is arranged above the operating table, and the linkage mechanism is arranged above the operating table. The present application can ensure that the relative positions of various parts of the impeller are accurate and consistent during the welding process through the equidistant adjustment mechanism, thereby ensuring the balance and symmetry of the impeller, which is crucial for reducing the vibration and noise generated during operation and improving the efficiency and stability of the vacuum pump, and can simplify the production preparation process, making the adjustment work faster and easier, improving the overall production efficiency and reducing costs.

Description

Technical Field

[0001] This application relates to the technical field of vacuum pump impeller processing, and in particular to a vacuum pump impeller welding fixture. Background Art

[0002] The vacuum pump impeller is the core component of the vacuum pump. Its main function is to help generate a vacuum. By rotating, it converts the mechanical energy of the motor into the kinetic energy of the gas and then into pressure energy to push the gas to flow and discharge, thereby improving efficiency. The efficiency of the vacuum pump can be controlled by adjusting the size and speed of the impeller to control the gas flow rate and pressure, and achieve stable operation under different working conditions. The durability and reliability of the impeller also determine the long-term operation of the vacuum pump in harsh environments, affecting maintenance requirements and costs, and are one of the key factors affecting the performance of the vacuum pump. The vacuum pump impeller welding fixture can ensure the accurate position of the impeller by using a specially designed fixture, thereby ensuring the welding quality;

[0003] When the existing vacuum pump impeller welding fixture is in use, it cannot be adjusted equidistantly. On the one hand, the inability to adjust equidistantly will result in inaccurate welding positions of the impeller, which will affect the balance and symmetry of the impeller. The imbalance of the impeller will generate excessive vibration and noise during operation, reducing the working efficiency and lifespan of the vacuum pump. On the other hand, the slight differences in the positions of the blades during welding may lead to uneven stress distribution at the weld, and fatigue damage to the blades or welds is likely to occur under long-term operation, increasing the risk of equipment failure. If rapid and accurate adjustment cannot be carried out, it will increase the time for production preparation and adjustment, thereby affecting production efficiency and increasing production costs. Summary of the Invention

[0004] One of the purposes of this application is to provide a vacuum pump impeller welding fixture.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A welding fixture for a vacuum pump impeller, comprising an operating table, an equidistant adjustment mechanism, a wheel disc clamping mechanism, a blade clamping and transposition mechanism, a blade height adjustment mechanism, a linkage mechanism, a welding mechanism, and a pressure testing mechanism. The equidistant adjustment mechanism is arranged on the top of the operating table. The wheel disc clamping mechanism is arranged on the equidistant adjustment mechanism. The blade clamping and transposition mechanism is arranged above the operating table. The blade height adjustment mechanism is arranged above the operating table. The linkage mechanism is arranged above the operating table. The welding mechanism is arranged outside the operating table. The pressure testing mechanism is arranged on one side of the top of the operating table. The equidistant adjustment mechanism is used for the blades of the impeller to be evenly distributed in the fixture. The wheel disc clamping mechanism is used to firmly clamp the wheel disc part of the impeller. The blade clamping and transposition mechanism clamps the blades and then transposes them, facilitating uniform contact and treatment of the blades during the welding process. The blade height adjustment mechanism enables the height of the blades to be adjusted according to requirements. The linkage mechanism coordinates the actions of different components in the fixture and operates synchronously throughout the welding process. The welding mechanism is responsible for the actual welding operation. The pressure testing mechanism conducts a pressure test on the impeller after welding.

[0006] Preferably, the equidistant adjustment mechanism includes a first L-shaped plate, a second L-shaped plate, a first motor, a rotating disc, a limit pin, a connecting rod, an adjustment disc, and a transmission groove. The first L-shaped plate is fixedly connected to one side of the top of the operating table. The second L-shaped plate is fixedly connected to the outside of the first L-shaped plate. The first motor is fixedly connected to the outside of the second L-shaped plate. The output shaft of the first motor penetrates through the second L-shaped plate and the first L-shaped plate. The rotating disc is fixedly connected to the output shaft of the first motor. The limit pin is fixedly connected to one side of the rotating disc. The connecting rod is rotatably connected to one side of the first L-shaped plate. The adjustment disc is fixedly connected to the outside of the connecting rod. The transmission grooves are equidistantly opened on the outside of the adjustment disc. The limit pins are all slidably connected to the corresponding transmission grooves.

[0007] Preferably, the wheel disc clamping mechanism includes a fixed disc, a support ring, a gear ring, three racks, three clamping plates, three transmission gears, and a second motor. The fixed disc is fixedly connected to the end of the connecting rod away from the first L-shaped plate. The support ring is fixedly connected to one side of the fixed disc. The gear ring is rotatably connected to one side of the support ring. The three racks are slidably connected inside the support ring. The three clamping plates are fixedly connected to the corresponding ends of the corresponding racks. The three transmission gears are all arranged inside the support ring. The transmission gears are meshed with the corresponding racks and the gear ring. The second motor is fixedly connected to the outside of the fixed disc. The output shaft of the second motor penetrates through the fixed disc and is fixedly connected to the outside of one of the transmission gears.

[0008] Preferably, the blade clamping and transposition mechanism includes a flower shaft rod, a third L-shaped plate, two clamping cylinders, and a second pulley. The flower shaft rod is rotatably connected inside the first L-shaped plate. The third L-shaped plate is fixedly connected to the bottom of the flower shaft rod. The two clamping cylinders are respectively fixedly connected to both ends of one side of the third L-shaped plate. The second pulley is rotatably connected to the top of the first L-shaped plate. The flower shaft rod is slidably connected to the second pulley.

[0009] Preferably, the blade height adjustment mechanism includes a telescopic cylinder and a first fixing plate. The telescopic cylinder is fixedly connected to the top of the first L-shaped plate. The first fixing plate is fixedly connected to the top of the flower shaft rod. One end of the bottom of the first fixing plate is fixedly connected to the output end of the telescopic cylinder.

[0010] Preferably, the linkage mechanism includes a first bevel gear, two second fixing plates, a rotating rod, a second bevel gear, a first pulley, and a transmission belt. The first bevel gear is fixedly connected to the output shaft of the first motor. The two second fixing plates are both fixedly connected to the outside of the first L-shaped plate. The rotating rod is rotatably connected between the two second fixing plates. The top and bottom of the rotating rod penetrate through the corresponding second fixing plates. The second bevel gear is fixedly connected to the bottom of the rotating rod. The second bevel gear is meshed with the first bevel gear. The first pulley is fixedly connected to the top of the rotating rod. The transmission belt is drivingly connected between the first pulley and the second pulley.

[0011] Preferably, the welding mechanism includes a third fixing plate, a robotic arm, and a laser welding head. The third fixing plate is fixedly connected to the outside of the operating table. The robotic arm is arranged on the top of the third fixing plate. The laser welding head is fixedly connected to the output end of the robotic arm.

[0012] Preferably, the pressure testing mechanism includes a support plate, two adjusting tubes, two bidirectional threaded rods, four sliding blocks, two adjusting knobs, four alignment blocks, and two pressure gauges. The support plate is fixedly connected to one end of the top of the operating table. The two adjusting tubes are both fixedly connected to one side of the support plate. The two bidirectional threaded rods are respectively rotatably connected inside the corresponding adjusting tubes. The four sliding blocks are respectively threadedly connected to the outside of the corresponding bidirectional threaded rods. One ends of the bidirectional threaded rods extend to the outside of the adjusting tubes and are fixedly connected to the corresponding adjusting knobs. The four alignment blocks are respectively fixedly connected to the closer sides of the corresponding two sliding blocks. The two pressure gauges are respectively fixedly connected to the outside of the corresponding sliding blocks. The corresponding two alignment blocks and pressure gauges are used in cooperation.

[0013] Preferably, limit blocks are fixedly connected to the outside of the racks. The limit blocks are both slidably connected to the support ring. Limit rods are fixedly connected to both sides of the bidirectional threaded rods inside the adjusting tubes. The sliding blocks are both slidably connected to the corresponding limit rods.

[0014] Preferably, a control panel is fixedly connected to the outer side of the operating table. The first motor, the second motor, the clamping cylinder, the telescopic cylinder, the robotic arm, and the laser welding head are all electrically connected to the control panel. Four support legs are fixedly connected to the bottom of the operating table.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] (1) The equidistant adjustment mechanism can ensure that the relative positions of all parts of the impeller are exactly the same during the welding process, thus guaranteeing the balance and symmetry of the impeller. This is crucial for reducing vibrations and noise generated during operation, improving the efficiency and stability of the vacuum pump, simplifying the production preparation process, making the adjustment work faster and easier, improving the overall production efficiency, and reducing costs.

[0017] (2) The wheel disc clamping mechanism can firmly fix the impeller, ensuring that the impeller remains stable during the welding process, preventing inaccurate welding caused by the movement or swing of the impeller, improving the welding quality, ensuring the smooth operation of the impeller, and reducing the key factors of vibration and noise.

[0018] (3) The blade clamping and transposition mechanism can ensure that each blade is in the best position during the welding process, achieving a more uniform and accurate welding quality, reducing the imbalance or structural weaknesses caused by position deviation of the blades, which is particularly important when dealing with impellers of various designs.

[0019] (4) Due to the design of the vacuum pump impeller may vary depending on the model or functional requirements, the height of the blades also varies accordingly. With the height adjustment mechanism, it is possible to adapt to these blades of different heights, ensure the versatility and applicability of the fixture, and ensure that the welding point is located at the best position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a first - perspective three - dimensional view of the present invention.

[0021] Figure 2 It is a second - perspective three - dimensional view of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the equidistant adjustment mechanism of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the wheel disc clamping mechanism of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the blade clamping and transposition mechanism of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the linkage mechanism of the present invention.

[0026] Figure 7 This is a schematic structural diagram of the welding mechanism of the present invention.

[0027] Figure 8 This is a schematic structural diagram of the pressure testing mechanism of the present invention.

[0028] Figure 9 This is a schematic sectional view of the pressure testing mechanism of the present invention.

[0029] Figure 10 This is an exploded structural diagram of the wheel disc clamping mechanism of the present invention.

[0030] In the figure: 1. Operating table; 2. First L-shaped plate; 3. Second L-shaped plate; 4. First motor; 5. Rotating disc; 6. Limit pin; 7. Connecting rod; 8. Adjusting disc; 9. Transmission groove; 10. Fixed disc; 11. Support ring; 12. Gear ring; 13. Rack; 14. Clamping plate; 15. Transmission gear; 16. Second motor; 17. Flower shaft rod; 18. Third L-shaped plate; 19. Clamping cylinder; 20. Telescopic cylinder; 21. First fixing plate; 22. First bevel gear; 23. Second fixing plate; 24. Rotating rod; 25. Second bevel gear; 26. First pulley; 27. Second pulley; 28. Transmission belt; 29. Third fixing plate; 30. Manipulator; 31. Laser welding head; 32. Support plate; 33. Adjusting tube; 34. Bidirectional threaded rod; 35. Sliding block; 36. Adjusting knob; 37. Alignment block; 38. Pressure gauge; 39. Limit block; 40. Limit rod; 41. Control panel; 42. Support leg. Detailed implementation manners

[0031] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0032] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0034] One preferred embodiment of the present application is as Figure 1 and Figure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for a vacuum pump impeller, the equidistant adjustment mechanism includes a first L-shaped plate 2, a second L-shaped plate 3, a first motor 4, a rotating disk 5, a limit pin 6, a connecting rod 7, an adjustment disk 8, and a transmission groove 9. The first L-shaped plate 2 is fixedly connected to one side of the top of the operating table 1, the second L-shaped plate 3 is fixedly connected to the outside of the first L-shaped plate 2, the first motor 4 is fixedly connected to the outside of the second L-shaped plate 3, the output shaft of the first motor 4 penetrates through the second L-shaped plate 3 and the first L-shaped plate 2, the rotating disk 5 is fixedly connected to the output shaft of the first motor 4, the limit pin 6 is fixedly connected to one side of the rotating disk 5, the connecting rod 7 is rotatably connected to one side of the first L-shaped plate 2, the adjustment disk 8 is fixedly connected to the outside of the connecting rod 7, the transmission groove 9 is equidistantly opened on the outside of the adjustment disk 8, and the limit pins 6 are all slidably connected to the corresponding transmission grooves 9. The above device can ensure that the relative positions of all parts of the impeller are precisely consistent during the welding process through the equidistant adjustment mechanism, thereby ensuring the balance and symmetry of the impeller. This is crucial for reducing vibration and noise generated during operation, improving the efficiency and stability of the vacuum pump, simplifying the production preparation process, making the adjustment work faster and easier, improving the overall production efficiency, and reducing costs.

[0035] As Figure 1 and Figure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for a vacuum pump impeller, the wheel disk clamping mechanism includes a fixed disk 10, a support ring 11, a gear ring 12, three rack bars 13, three clamping plates 14, three transmission gears 15, and a second motor 16. The fixed disk 10 is fixedly connected to the end of the connecting rod 7 away from the first L-shaped plate 2, the support ring 11 is fixedly connected to one side of the fixed disk 10, the gear ring 12 is rotatably connected to one side of the support ring 11, the three rack bars 13 are slidably connected inside the support ring 11, the three clamping plates 14 are fixedly connected to the corresponding ends of the corresponding rack bars 13, the three transmission gears 15 are all arranged inside the support ring 11, the transmission gears 15 are all meshed with the corresponding rack bars 13 and the gear ring 12, and the second motor 16 is fixedly connected to the outside of the fixed disk 10, and the output shaft of the second motor 16 penetrates through the fixed disk 10 and is fixedly connected to the outside of one of the transmission gears 15. The above device can firmly fix the impeller through the wheel disk clamping mechanism, ensure that the impeller remains stable during the welding process, prevent inaccurate welding caused by the movement or swing of the impeller, improve the welding quality, ensure the smooth operation of the impeller, and reduce the key factors of vibration and noise.

[0036] As Figure 1 andFigure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for the vacuum pump impeller. The blade clamping and transposition mechanism includes a flower shaft rod 17, a third L-shaped plate 18, two clamping cylinders 19, and a second pulley 27. The flower shaft rod 17 is rotatably connected inside the first L-shaped plate 2. The third L-shaped plate 18 is fixedly connected to the bottom of the flower shaft rod 17. The two clamping cylinders 19 are respectively fixedly connected to both ends on one side of the third L-shaped plate 18. The second pulley 27 is rotatably connected to the top of the first L-shaped plate 2. The flower shaft rod 17 is slidably connected to the second pulley 27. The above device can ensure that each blade is in the best position during the welding process through the blade clamping and transposition mechanism, achieving a more uniform and precise welding quality, reducing the imbalance or structural weaknesses caused by the position deviation of the blades, which is particularly important when dealing with impellers of various designs.

[0037] As Figure 1 and Figure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for the vacuum pump impeller. The blade height adjustment mechanism includes a telescopic cylinder 20 and a first fixing plate 21. The telescopic cylinder 20 is fixedly connected to the top of the first L-shaped plate 2. The first fixing plate 21 is fixedly connected to the top of the flower shaft rod 17. One end of the bottom of the first fixing plate 21 is fixedly connected to the output end of the telescopic cylinder 20. The design of the vacuum pump impeller may vary due to model or functional requirements, and the height of the blades also varies accordingly. With the height adjustment mechanism, it is possible to adapt to these blades of different heights, ensuring the versatility and applicability of the fixture, and ensuring that the welding point is in the best position.

[0038] As Figure 1 and Figure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for the vacuum pump impeller. The linkage mechanism includes a first bevel gear 22, two second fixing plates 23, a rotating rod 24, a second bevel gear 25, a first pulley 26, and a transmission belt 28. The first bevel gear 22 is fixedly connected to the output shaft of the first motor 4. The two second fixing plates 23 are both fixedly connected to the outside of the first L-shaped plate 2. The rotating rod 24 is rotatably connected between the two second fixing plates 23. The top and bottom of the rotating rod 24 penetrate through the corresponding second fixing plates 23. The second bevel gear 25 is fixedly connected to the bottom of the rotating rod 24. The second bevel gear 25 is meshed with the first bevel gear 22. The first pulley 26 is fixedly connected to the top of the rotating rod 24. The transmission belt 28 is drivingly connected between the first pulley 26 and the second pulley 27. The above device can ensure that all blades are adjusted simultaneously and in the same way during the welding process through the linkage mechanism, which helps to ensure the consistency of welding and the dynamic balance of the impeller, reducing the errors that may be introduced by adjusting each blade individually.

[0039] As Figure 1 and Figure 10As shown in the processing of the vacuum pump impeller, a welding fixture for the vacuum pump impeller, the welding mechanism includes a third fixing plate 29, a robotic arm 30 and a laser welding head 31. The third fixing plate 29 is fixedly connected to the outside of the operating table 1. The robotic arm 30 is arranged on the top of the third fixing plate 29. The laser welding head 31 is fixedly connected to the output end of the robotic arm 30. The above device provides extremely high welding precision for laser welding, can accurately control the welding position, depth and size. The weld quality produced by this welding method is high, the combination is tight, which helps to improve the overall performance and durability of the impeller, and the thermal damage of the impeller material is minimized, thus retaining the inherent properties and structural integrity of the material.

[0040] As Figure 1 and Figure 10 As shown in the processing of the vacuum pump impeller, a welding fixture for the vacuum pump impeller, the pressure testing mechanism includes a support plate 32, two adjusting pipes 33, two bidirectional threaded rods 34, four sliding blocks 35, two adjusting knobs 36, four alignment blocks 37 and two pressure gauges 38. The support plate 32 is fixedly connected to one end of the top of the operating table 1. The two adjusting pipes 33 are both fixedly connected to one side of the support plate 32. The two bidirectional threaded rods 34 are respectively rotatably connected to the inside of the corresponding adjusting pipes 33. The four sliding blocks 35 are respectively threadedly connected to the outside of the corresponding bidirectional threaded rods 34. One end of the bidirectional threaded rods 34 extends to the outside of the adjusting pipes 33 and is fixedly connected to the corresponding adjusting knob 36. The four alignment blocks 37 are respectively fixedly connected to the closer sides of the corresponding two sliding blocks 35. The two pressure gauges 38 are respectively fixedly connected to the outside of the corresponding sliding blocks 35. The corresponding two alignment blocks 37 and pressure gauges 38 are used in cooperation. The above device can test the sealing performance and strength of the welded joint through pressure testing, ensure that the weld can withstand the predetermined pressure during actual use, help prevent leakage or impeller damage caused by welding defects, discover problems in time and correct them during the production process. This immediate quality control can reduce the outflow of defective products and improve the overall production efficiency.

[0041] Working principle: When the above-mentioned vacuum pump impeller welding fixture is in use, it is controlled by the first motor 4 to adjust the rotating disk 5 to a suitable position to ensure that the blades of the impeller can be evenly distributed in the fixture. The disk clamping mechanism firmly clamps the disk part of the impeller through the cooperation of the support ring 11, the gear ring 12, the rack 13 and the clamping plate 14 to prevent it from shifting during the welding process. This process is powered by the second motor 16 and precisely controlled through the transmission gear 15. The blade height adjustment mechanism includes a telescopic cylinder 20 and a first fixing plate 21, which allows the height of each blade to be adjusted as needed to adapt to impellers with different designs. The blade clamping and transposition mechanism realizes the precise clamping and transposition of the blades through the control of the flower shaft rod 17 and the clamping cylinder 19, providing convenience for the welding operation. Through the coordinated work of the first bevel gear 22, the rotating rod 24, the second bevel gear 25 and the transmission belt 28, it ensures the synchronous operation of different components in the fixture and improves the operation efficiency. The actual welding operation is carried out by the robotic arm 30 and the laser welding head 31. The welding position and speed are precisely controlled through the control panel 41 to ensure high-quality welding seams. After the welding is completed, the pressure test mechanism including the support plate 32, the adjustment pipe 33 and the pressure gauge 38 is used to conduct a pressure test on the impeller to check the sealing performance and structural strength of the welding seams to ensure that the impeller meets the usage requirements. The first motor 4, the second motor 16, the clamping cylinder 19, the telescopic cylinder 20, the robotic arm 30 and the laser welding head 31 are all electrically controlled through the control panel 41 of the operating table 1, realizing the automation and precision of the operation. The support legs 42 at the bottom of the operating table 1 ensure the stability and reliability of the entire welding fixture, providing a solid foundation for high-quality welding operations.

[0042] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A vacuum pump impeller welding fixture, characterized in that: include: An operating table (1), an equidistant adjustment mechanism, a wheel clamping mechanism, a blade clamping and shifting mechanism, a blade height adjustment mechanism, a linkage mechanism, a welding mechanism, and a pressure testing mechanism; The isometric adjustment mechanism is arranged on the top of the operating platform (1), the wheel disc clamping mechanism is arranged on the isometric adjustment mechanism, the blade clamping and shifting mechanism is arranged above the operating platform (1), the blade height adjustment mechanism is arranged above the operating platform (1), the linkage mechanism is arranged above the operating platform (1), the welding mechanism is arranged on the outside of the operating platform (1), and the pressure testing mechanism is arranged on one side of the top of the operating platform (1); The equidistant adjustment mechanism is used to distribute the blades of the impeller at an equidistant in the fixture; the wheel disc clamping mechanism is used to firmly clamp the wheel disc portion of the impeller; the blade clamping and shifting mechanism shifts the blades after clamping them, so as to facilitate uniform contact and processing of the blades during welding; the blade height adjustment mechanism enables the height of the blades to be adjusted according to demand; the linkage mechanism coordinates the actions of different components in the fixture and operates synchronously during the entire welding process; the welding mechanism is responsible for the actual welding operation; and the pressure testing mechanism performs a pressure test on the impeller after welding; the equidistant adjustment mechanism comprises a first L-shaped plate (2), a second L-shaped plate (3), a first motor (4), a rotating disk (5), a limit pin (6), a connecting rod (7), an adjustment disk (8) and a transmission groove (9), the first L-shaped plate (2) is fixedly connected to one side of the top of the operating table (1), the second L-shaped plate (3) is fixedly connected to the outer side of the first L-shaped plate (2), the first motor (4) is fixedly connected to the outer side of the second L-shaped plate (3), the output shaft of the first motor (4) passes through the second L-shaped plate (3) and the first L-shaped plate (2), the rotating disk (5) is fixedly connected to the output shaft of the first motor (4), the limit pin (6) is fixedly connected to one side of the rotating disk (5), the connecting rod (7) is rotatably connected to one side of the first L-shaped plate (2), the adjusting disk (8) is fixedly connected to the outside of the connecting rod (7), the transmission grooves (9) are equidistantly arranged on the outer side of the adjusting disk (8), and the limit pins (6) are all slidably connected to the corresponding transmission grooves (9); The wheel disc clamping mechanism comprises a fixed disc (10), a support ring (11), a gear ring (12), three racks (13), three clamping plates (14), three transmission gears (15) and a second motor (16); the fixed disc (10) is fixedly connected to an end of the connecting rod (7) away from the first L-shaped plate (2); the support ring (11) is fixedly connected to one side of the fixed disc (10); the gear ring (12) is rotatably connected to one side of the support ring (11); and the three racks (13) are slidably connected to the first L-shaped plate (2). Inside the support ring (11), the three clamping plates (14) are fixedly connected to the corresponding ends of the corresponding racks (13), the three transmission gears (15) are all arranged inside the support ring (11), the transmission gears (15) are all meshed with the corresponding racks (13) and the gear ring (12), the second motor (16) is fixedly connected to the outside of the fixed disk (10), and the output shaft of the second motor (16) passes through the fixed disk (10) and is fixedly connected to the outside of one of the transmission gears (15); The blade clamping and shifting mechanism comprises a flower shaft rod (17), a third L-shaped plate (18), two clamping cylinders (19) and a second pulley (27); the flower shaft rod (17) is rotatably connected to the inside of the first L-shaped plate (2); the third L-shaped plate (18) is fixedly connected to the bottom of the flower shaft rod (17); the two clamping cylinders (19) are respectively fixedly connected to two ends of one side of the third L-shaped plate (18); the second pulley (27) is rotatably connected to the top of the first L-shaped plate (2); and the flower shaft rod (17) is slidably connected to the second pulley (27); The blade height adjustment mechanism comprises a telescopic cylinder (20) and a first fixing plate (21), wherein the telescopic cylinder (20) is fixedly connected to the top of the first L-shaped plate (2), the first fixing plate (21) is fixedly connected to the top of the flower shaft rod (17), and one end of the bottom of the first fixing plate (21) is fixedly connected to the output end of the telescopic cylinder (20); The linkage mechanism comprises a first bevel gear (22), two second fixed plates (23), a rotating rod (24), a second bevel gear (25), a first pulley (26) and a transmission belt (28), wherein the first bevel gear (22) is fixedly connected to the output shaft of the first motor (4), the two second fixed plates (23) are fixedly connected to the outer side of the first L-shaped plate (2), the rotating rod (24) is rotationally connected between the two second fixed plates (23), the top and the bottom of the rotating rod (24) both pass through the corresponding second fixed plates (23), the second bevel gear (25) is fixedly connected to the bottom of the rotating rod (24), the second bevel gear (25) is meshedly connected to the first bevel gear (22), the first pulley (26) is fixedly connected to the top of the rotating rod (24), and the transmission belt (28) is transmission-connected between the first pulley (26) and the second pulley (27); The welding mechanism comprises a third fixing plate (29), a mechanical arm (30) and a laser welding head (31), wherein the third fixing plate (29) is fixedly connected to the outside of the operating table (1), the mechanical arm (30) is arranged on the top of the third fixing plate (29), and the laser welding head (31) is fixedly connected to the output end of the mechanical arm (30); The pressure testing mechanism comprises a support plate (32), two adjusting tubes (33), two bidirectional threaded rods (34), four sliding blocks (35), two adjusting knobs (36), four alignment blocks (37) and two pressure gauges (38), wherein the support plate (32) is fixedly connected to one end of the top of the operating table (1), the two adjusting tubes (33) are fixedly connected to one side of the support plate (32), the two bidirectional threaded rods (34) are respectively rotatably connected to the inside of the corresponding adjusting tubes (33), the four sliding blocks (35) are respectively threadedly connected to the outside of the corresponding bidirectional threaded rods (34), one end of the bidirectional threaded rods (34) extends to the outside of the adjusting tubes (33) and is fixedly connected to the corresponding adjusting knobs (36), the four alignment blocks (37) are respectively fixedly connected to the side close to the corresponding two sliding blocks (35), the two pressure gauges (38) are respectively fixedly connected to the outside of the corresponding sliding blocks (35), and the corresponding two alignment blocks (37) and the pressure gauges (38) are used in coordination with each other; The outer sides of the racks (13) are fixedly connected to limit blocks (39), and the limit blocks (39) are slidably connected to the support ring (11). The interior of the adjustment tube (33) and both sides of the bidirectional threaded rod (34) are fixedly connected to limit rods (40), and the sliding blocks (35) are slidably connected to the corresponding limit rods (40).

2. A vacuum pump impeller welding fixture as claimed in claim 1, characterized in that: A control panel (41) is fixedly connected to the outside of the operating table (1); the first motor (4), the second motor (16), the clamping cylinder (19), the telescopic cylinder (20), the mechanical arm (30) and the laser welding head (31) are all electrically connected to the control panel (41); and four supporting legs (42) are fixedly connected to the bottom of the operating table (1).

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