Electromagnetic expansion valve manufacturing tool

Abstract

The application discloses a kind of electromagnetic expansion valve preparation frock, including bottom plate, detection mechanism is arranged on the bottom plate, the upper surface of bottom plate is respectively provided with one stand in four corners, the top of stand is equipped with mounting plate, the upper surface of mounting plate is fixedly provided with fixed frame, the top of fixed frame is provided with annular annular frame, the inner side surface of annular frame is connected with circular fixed plate by connecting rod, the upper surface of fixed plate is provided with driving motor I, the output shaft of driving motor I is worn out the lower surface of fixed plate and is fixedly connected with rotating rod.This application is convenient to adjust the position during the fixing and welding process of expansion valve and easy to automate operation, greatly reduces the preparation difficulty, the welding of inlet and outlet pipe is also more convenient, at the same time, the expansion valve after installation is detected by detection mechanism, it is not necessary to send the prepared electromagnetic expansion valve to detection workshop for detection again, simplify the preparation process, further improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic expansion valve technology, specifically to a tooling for manufacturing electromagnetic expansion valves. Background Technology

[0002] The electromagnetic expansion valve, as a core component of the refrigeration system, plays a crucial role. It precisely regulates the refrigerant flow rate according to the system's needs and actual conditions. Through this mechanism, the electromagnetic expansion valve ensures that the amount of refrigerant entering the evaporator is just right, thus achieving a perfect match between the evaporator and the cooling load. When the refrigeration system needs to increase its power, i.e., increase its cooling capacity, the electromagnetic expansion valve responds quickly, increasing its opening to increase the refrigerant flow. Conversely, when the system needs to reduce its cooling capacity, it decreases its opening, reducing refrigerant flow to achieve energy saving and efficient operation.

[0003] The electromagnetic expansion valve has two connecting pipes inside. One pipe is responsible for air intake, and the other for air exhaust. The connection between these two pipes and the valve body is crucial and is usually fixed by welding or bonding to ensure its sealing and stability.

[0004] However, during the fabrication of electromagnetic expansion valves, fixing the valve body due to its unique shape is often a challenge. This not only increases the difficulty of fabrication but also affects the installation and connection efficiency of the connecting pipes. Therefore, current electromagnetic expansion valve fabrication processes still have certain shortcomings. Furthermore, to ensure the quality of the electromagnetic expansion valve, a breathable and sealing test must be performed after fabrication. However, existing fabrication fixtures often only have positioning functions and lack the ability to easily test the fabricated electromagnetic expansion valve. Therefore, we propose a fabrication fixture for electromagnetic expansion valves. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a tooling for the preparation of an electromagnetic expansion valve. This tooling facilitates the position adjustment during the fixing and welding process of the expansion valve and is easy to automate, greatly reducing the difficulty of preparation. Welding of the inlet and outlet pipes is also more convenient. At the same time, the air tightness of the installed expansion valve can be tested by a testing mechanism, eliminating the need to send the prepared electromagnetic expansion valve to a testing workshop for testing. This simplifies the preparation process, further improves work efficiency, and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic expansion valve manufacturing fixture, comprising a base plate, a detection mechanism on the base plate, a column at each of the four corners of the upper surface of the base plate, a mounting plate at the top of the column, a fixing frame fixedly mounted on the upper surface of the mounting plate, an annular frame at the top of the fixing frame, a circular fixing plate connected to the inner surface of the annular frame by a connecting rod, a drive motor I on the upper surface of the fixing plate, the output shaft of drive motor I passing through the lower surface of the fixing plate and fixedly connected to a rotating rod, a rotating block at the end of the rotating rod, an annular groove on the inner surface of the annular frame, the rotating block slidingly disposed in the annular groove, an electric push rod on the lower surface of the rotating block, a lifting seat on the lower surface of the movable end of the electric push rod, a drive motor II mounted on the side surface of the lifting seat away from drive motor I, the output shaft of drive motor II passing through the side surface of the lifting seat and connected to the rotating seat, and a clamping component for clamping and fixing the expansion valve body on the rotating seat.

[0007] As a preferred embodiment of the present invention, a U-shaped connecting frame is provided on the middle side surface of the fixing frame, and a U-shaped support frame is fixedly provided on the side surface of the connecting frame facing the drive motor I. The inner diameter of the support frame is smaller than the outer diameter of the expansion valve body and larger than the outer diameter of the lower interface of the expansion valve.

[0008] As a preferred embodiment of the present invention, the clamping component includes two arc-shaped clamping rings with concave surfaces facing each other. Two sliding grooves are symmetrically opened on the side surface of the rotating seat. The two clamping rings are slidably disposed in one of the sliding grooves. A drive motor III is installed on the outer surface of the rotating seat. The output shaft of the drive motor III passes through the sliding groove and is connected to the drive screw through a coupling. The drive screw is threadedly connected to the screw hole opened on the clamping ring. The two sections of the drive screw in the two sliding grooves have opposite thread directions, and the screw holes opened on the two clamping rings also have opposite thread directions.

[0009] As a preferred embodiment of the present invention, the inner surface of the clamping ring is provided with an anti-slip pad.

[0010] As a preferred embodiment of the present invention, the upper surface of the mounting plate is provided with welding gun holder I and welding gun holder II respectively.

[0011] As a preferred embodiment of the present invention, the detection mechanism includes an air pump mounted on the upper surface of the base plate, an air inlet pipe connected to the air outlet of the air pump, a solenoid valve mounted on the air inlet pipe, the air inlet pipe extending out of the upper surface of the mounting plate, and the air inlet pipe being coaxially arranged with the output shaft of the drive motor I; an air outlet pipe is provided on the upper surface of the mounting plate, the air outlet pipe extending out of the lower surface of the mounting plate and connected to the air bladder, and a barometer is provided on the air bladder.

[0012] As a preferred embodiment of the present invention, both the upper surface of the air inlet pipe and the upper surface of the air outlet pipe are provided with annular grooves.

[0013] As a preferred embodiment of the present invention, a plurality of sealing rings are uniformly arranged on the inner surface of the slot.

[0014] As a preferred embodiment of the present invention, the bottom outer side of the air outlet pipe is connected to a threaded cylinder by a thread, and an annular groove is provided on the lower outer surface of the air outlet pipe, and an elastic ring matching the groove is provided at the top of the airbag.

[0015] As a preferred embodiment of the present invention, a T-shaped fixing block is fixedly provided in the middle of the inner surface of the air outlet pipe, two semi-circular elastic plates are symmetrically arranged on both sides of the bottom end of the fixing block, and a spring is provided at each of the top two ends of the fixing block, and the two springs are respectively connected to the upper surface of the two elastic plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the expansion valve body is clamped and fixed by the clamping component, and the corresponding expansion valve outlet pipe is manually spot-welded to the outlet connection of the expansion valve. Then, the rotating seat is driven by the drive motor II to rotate the expansion valve, and the expansion valve and its outlet pipe are welded together with the external welding torch. Afterwards, the expansion valve inlet pipe is spot-welded to the inlet connection of the expansion valve. The rotating rod and rotating block are driven by the drive motor I to rotate, thereby driving the rotating seat to rotate around the axis of the drive motor I, and the welding of the expansion valve and its inlet pipe is completed with the external welding torch. During the process, the electric push rod is used to adjust the height of the lifting seat and the rotating seat, so that the expansion valve will not interfere with or obstruct other components during the rotation welding process, ensuring the stability and smoothness of the welding process, thereby improving work efficiency. This tooling makes it convenient to fix the expansion valve and adjust its position during the welding process, and is easy to automate, which greatly reduces the difficulty of preparation and makes the welding of the inlet and outlet pipes more convenient. The air tightness of the installed expansion valve can be tested by the testing agency, eliminating the need to send the prepared electromagnetic expansion valve to the testing workshop for testing, simplifying the preparation process and further improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a side view of the structure of the present invention;

[0019] Figure 3 This is a front view structural diagram of the present invention;

[0020] Figure 4 This is a partial bottom view of the structure of the present invention;

[0021] Figure 5 This is a partial side view of the structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the air outlet tube and airbag of the present invention;

[0023] Figure 7 This is a top view of the rotating base of the present invention.

[0024] Figure 8 This is a schematic diagram of another embodiment of the present invention.

[0025] In the diagram: 1. Base plate, 2. Column, 3. Mounting plate, 4. Fixing frame, 5. Connecting frame, 6. Support frame, 7. Ring frame, 8. Fixing plate, 9. Drive motor I, 10. Rotating rod, 11. Rotating block, 12. Annular groove, 13. Electric push rod, 14. Lifting seat, 15. Rotating seat, 16. Drive motor II, 17. Drive motor III, 18. Slide groove, 19. Drive screw, 20. Clamping ring, 21. Anti-slip pad, 22. Welding gun holder I, 23. Welding gun holder II, 24. Air pump, 25. Air inlet pipe, 26. Air outlet pipe, 27. Slot, 28. Sealing ring, 29. Threaded cylinder, 30. Groove, 31. Airbag, 32. Barometer, 33. Elastic ring, 34. Fixing block, 35. Elastic plate, 36. Spring, 37. Frustum block. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-8This invention provides a technical solution: a tooling for manufacturing an electromagnetic expansion valve, comprising a base plate 1, with a column 2 respectively disposed at each of the four corners of the upper surface of the base plate 1, and a mounting plate 3 installed at the top of the column 2. An assembly for testing the airtightness of the expansion valve is installed between the mounting plate 3 and the base plate 1. A gate-shaped fixing frame 4 is fixedly disposed on the upper surface of the mounting plate 3, and an annular frame 7 is disposed at the top of the fixing frame 4. A circular fixing plate 8 is connected to the inner surface of the annular frame 7 via a connecting rod. A drive motor 19 is disposed on the upper surface of the fixing plate 8, and the output shaft of the drive motor 19 extends through the lower surface of the fixing plate 8 and is fixed to a rotating rod 10. A rotating block 11 is provided at the end of the rotating rod 10, and an electric push rod 13 is provided on the lower surface of the rotating block 11. A lifting seat 14 is provided on the lower surface of the movable end of the electric push rod 13. A drive motor 16 is installed on the side surface of the lifting seat 14 away from the drive motor I 9. The output shaft of the drive motor II 16 passes through the side surface of the lifting seat 14 and is connected to the rotating seat 15. The rotating seat 15 is provided with a clamping component for clamping and fixing the body of the expansion valve. During the preparation of the electromagnetic expansion valve, the body of the electromagnetic expansion valve is stably clamped and fixed by the clamping component to ensure that it will not be displaced during the entire preparation process. Next, the staff will manually and accurately place the air outlet pipe at the air outlet connection on the side of the electromagnetic expansion valve and perform preliminary spot welding. Subsequently, the drive motor II 16 starts to work, driving the rotating seat 15, the clamping component and the electromagnetic expansion valve to rotate. At this time, the external welding gun works synchronously to perform fine welding on the connection between the air outlet of the expansion valve and the air outlet pipe to ensure that the connection is both firm and sealed.

[0028] After the exhaust pipe is welded, the workers manually align the air inlet of the expansion valve with the air inlet pipe and initially fix it by spot welding. At this time, the drive motor I9 drives the rotating block 11 to rotate via the rotating rod 10, and drives the lifting seat 14 and the rotating seat 15 to rotate around the shaft of the drive motor I16 via the electric push rod 13. At the same time, the external welding torch works again to weld the connection between the air inlet and the air inlet pipe.

[0029] During the welding process, the staff controls the electric push rod 13 to precisely adjust the height of the lifting seat 14 and the rotating seat 15 according to the welding position, ensuring that the expansion valve will not interfere with or collide with other parts of the tooling during the rotation welding process, thereby ensuring the stability and smoothness of the welding process and greatly improving work efficiency.

[0030] Preferably, the inner surface of the ring frame 7 is provided with an annular groove 12, and the rotating block 11 is slidably disposed in the annular groove 12. The annular groove 12 can provide support for the rotating block 11, making the rotating rod 10 more stable when driving the rotating block 11, electric push rod 13, lifting seat 14, rotating seat 15, clamping component and expansion valve to rotate.

[0031] An optional technical solution is that a U-shaped connecting frame 5 is provided on the middle side surface of the fixing frame 4, and a U-shaped support frame 6 is fixedly provided on the side surface of the connecting frame 5 facing the drive motor I9. The inner diameter of the support frame 6 is smaller than the outer diameter of the expansion valve body and larger than the outer diameter of the lower interface of the expansion valve. It is used to place the expansion valve body so that the clamping component can clamp and fix it. The support frame 6 is coaxially arranged with the output shaft of the drive motor I9, which can save positioning time.

[0032] The positions of the connecting frame 5 and the support frame 6 are designed to avoid affecting the rotation of the expansion valve and the pipe body during the welding process. When welding the air inlet pipe, i.e. when the expansion valve rotates with the drive motor I9, the expansion valve is lifted to a higher position in advance by the electric push rod 13 to avoid motion interference between the installed air outlet pipe and the support frame 6.

[0033] In a preferred embodiment, the clamping component includes two arc-shaped clamping rings 20 with concave surfaces facing each other. Two symmetrical sliding grooves 18 are formed on the side surface of the rotating seat 15. The two clamping rings 20 are slidably disposed within one of the sliding grooves 18. A drive motor III 17 is mounted on the outer surface of the rotating seat 15. The output shaft of the drive motor III 17 passes through the sliding groove 18 and is connected to a drive screw 19 via a coupling. The drive screw 19 is threadedly connected to the screw holes formed on the clamping rings 20. The two sections of the drive screw 19 have opposite thread directions within the two sliding grooves 18, and the thread directions of the screw holes formed on the two clamping rings 20 are also opposite. The drive motor III 17, by rotating the drive screw 19, can drive the two clamping rings 20 to move relative to or away from each other, thereby clamping or releasing the expansion valve body. This method is simple to operate, easy to fix, and easy to maintain.

[0034] The curvature of the clamping ring 20 matches the diameter of the expansion valve, and when the clamping ring 20 clamps the expansion valve, its end is at a certain distance from its outlet port to avoid affecting the welding of the expansion valve outlet pipe.

[0035] Optionally, the inner surface of the clamping ring 20 is provided with an anti-slip pad 21. The anti-slip pad 21 is made of a high-temperature resistant material such as fluororubber to ensure that the electromagnetic expansion valve body can also play a good anti-slip role when heated during the welding process, further ensuring the stability of the electromagnetic expansion valve manufacturing process.

[0036] In a preferred embodiment, the upper surface of the mounting plate 3 is provided with welding torch holder I 22 and welding torch holder II 23, which are set 90 degrees apart with the axis of the output shaft of the drive motor I 9 as the center line. Welding torch holder I 22 is lower and is used to install the welding torch for welding the bottom air inlet pipe of the electromagnetic expansion valve; welding torch holder II 23 is higher and is used to install the welding torch for welding the side air outlet pipe of the electromagnetic expansion valve.

[0037] In the preferred technical solution, a testing mechanism is provided on the base plate 1 to test the sealing performance of the expansion valve after its preparation. This eliminates the need to send the prepared electromagnetic expansion valve to the testing workshop for testing, simplifying the preparation process and further improving work efficiency.

[0038] Specifically, the detection mechanism includes an air pump 24 mounted on the upper surface of the base plate 1. An air inlet pipe 25 is connected to the air outlet of the air pump 24. A solenoid valve is mounted on the air inlet pipe 25. The air inlet pipe 25 extends out of the upper surface of the mounting plate 3 and is coaxially arranged with the output shaft of the drive motor I9. An air outlet pipe 26 is provided on the upper surface of the mounting plate 3. The air outlet pipe 26 extends out of the lower surface of the mounting plate 3 and connects to the air bladder 31. A pressure gauge 32 is mounted on the air bladder 31. After the welding of the air inlet and outlet pipes of the electromagnetic expansion valve is completed, the electromagnetic expansion valve is lowered by the drive of the electric push rod 13, and the air inlet pipe of the electromagnetic expansion valve is connected to the air inlet pipe 25 of the air pump 24. Connect the air outlet pipe of the electromagnetic expansion valve to the air outlet pipe 26. Then, the air pump 24 supplies air to the electromagnetic expansion valve. The air enters the electromagnetic expansion valve through the air outlet pipe 26 and then enters the air bladder 31 to inflate it. After inflating for a period of time, close the solenoid valve on the air pump 24 and the air inlet pipe 25, and observe the reading of the barometer 32. If the reading of the barometer 32 is stable within a certain period of time, it indicates that the electromagnetic expansion valve and its pipeline connection are well sealed and can be removed and sent to the packaging workshop. If the reading of the barometer 32 gradually decreases, it indicates that the electromagnetic expansion valve and its pipeline connection are poorly sealed and needs to be sent to the repair workshop for inspection and rework.

[0039] The barometer 32 can be an electronic barometer, which is connected to an external control system. It continuously transmits the detected pressure value to the processor in the control system. The processor analyzes the pressure value and compares it with the preset value. The detection results are displayed on the control system's screen and other interactive devices for staff to view and process accordingly. At the same time, when it is determined that the sealing is poor and repairs and rework are required, buzzers, indicator lights and other means can be used to remind staff to carry out manual quality inspection and processing.

[0040] The drive motor I 9, drive motor II 16, drive motor III 17, electric push rod 13, air pump 24, barometer 32, etc. used in this application are all electrically connected to the corresponding control switches or controllers in the external control system. Moreover, the drive motor I 9, drive motor II 16, drive motor III 17, electric push rod 13, air pump 24, barometer 32, etc. used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, and circuit connections are all well-known technologies and will not be described in detail here.

[0041] In a preferred embodiment, the upper surface of the air inlet pipe 25 and the upper surface of the air outlet pipe 26 are provided with annular grooves 27, which are used to clamp the ends of the air inlet pipe and the air outlet pipe of the electromagnetic expansion valve, respectively, thereby improving their connection sealing performance and avoiding inaccurate test results due to poor connection sealing performance.

[0042] In a further preferred embodiment, a plurality of sealing rings 28 are uniformly arranged on the inner surface of the slot 27. After the air inlet pipe and air outlet pipe of the electromagnetic expansion valve are inserted into the corresponding slots 27, the sealing rings 28 are squeezed. The squeezing of the sealing rings 28 further improves the connection sealing performance, thereby further improving the accuracy of the test results.

[0043] In a preferred embodiment, the outer side of the bottom end of the air outlet pipe 26 is connected to a threaded cylinder 29 via a thread, and an annular groove 30 is formed on the lower outer surface of the air outlet pipe 26. The top end of the airbag 31 is provided with an elastic ring 33 that matches the groove 30. The neck of the airbag 31 is made of a high-strength elastic material. When installing the airbag 31, the elastic ring 33 and the airbag 31 are first passed through the threaded cylinder 29. Then, the neck of the airbag 31 is fitted onto the outer side of the bottom end of the air outlet pipe 26, and the elastic ring 33 is locked into the groove 30. After that, the threaded cylinder 29 is threaded to the outer side of the bottom end of the air outlet pipe 26, thereby ensuring the sealing of the connection between the airbag 31 and the air outlet pipe 26 and ensuring the accuracy of the test results.

[0044] The threads on the threaded cylinder 29 and the external threads on the air outlet pipe 26 are both large threads to avoid damaging the neck part of the airbag 31 during tightening.

[0045] An optional technical solution involves fixing a T-shaped fixing block 34 to the center of the inner surface of the air outlet pipe 26. Two semi-circular elastic plates 35 are symmetrically arranged on both sides of the bottom end of the fixing block 34. A spring 36 is installed at each end of the top of the fixing block 34. The two springs 36 are connected to the upper surfaces of the two elastic plates 35. During inflation, the gas pushes open the two elastic plates 35, entering the airbag 31 for inflation and sealing testing. Simultaneously, the gas flushes out debris and particles from the expansion valve into the airbag 31, cleaning the expansion valve and its fittings and preventing foreign matter from affecting its operation, thus improving product quality. After testing, the solenoid valve on the air inlet pipe 25 is opened, expelling the gas from the airbag 31. Simultaneously, the two elastic plates 35, driven by their own elasticity and the springs 36, return to their upper positions, closing the air outlet pipe 26. This prevents debris and fragments from entering the airbag 31 from returning to the solenoid expansion valve, further ensuring the quality of the solenoid expansion valve.

[0046] Alternatively, the inner surface of the air outlet pipe 26 is symmetrically provided with limiting grooves corresponding to the elastic plate 35. When the elastic plate 35 is pulled to the uppermost side by the spring 36 and reset, its edge is stuck in the limiting groove, keeping it horizontal and preventing it from being pulled to the upper side. This ensures that the two elastic plates 35 can close the pipeline in the air outlet pipe 26 when no air is supplied, preventing the debris temporarily stored in the airbag 31 from flowing back into the expansion valve.

[0047] Furthermore, several frustum blocks 37 are evenly arranged on the inner surface of the airbag 31. The smaller side of the frustum block 37 is fixedly connected to the inner surface of the airbag 31, and the larger side faces the center of the airbag 31. The frustum blocks 37 are made of elastic material. When the airbag 31 is inflated to test the airtightness, it fills with gas and expands, causing the frustum blocks 37 to open. The distance between adjacent frustum blocks 37 increases, and debris and impurities in the electromagnetic expansion valve are blown into the airbag 31 and into the adjacent frustum blocks 37. The gaps between them; after the test is completed, after the air pump and solenoid valve are turned off, the gas in the airbag 31 is released outward, the volume of the airbag 31 becomes smaller, the truncated pyramid block 37 contracts inward, the distance between adjacent truncated pyramid blocks 37 becomes smaller, and since the larger side of the truncated pyramid block 37 is set on the outside, the cleaned debris and impurities can be left in the gaps between the truncated pyramid blocks 37, further preventing the debris and impurities in the airbag 31 from flowing back into the expansion valve, thus ensuring the cleaning effect and further improving the quality of the electromagnetic expansion valve.

[0048] By simultaneously cleaning the electromagnetic expansion valve and its internal piping during the airtightness testing process, the overall manufacturing steps of the electromagnetic expansion valve can be reduced, thereby simplifying the production process, improving production efficiency, reducing production costs, and also improving the overall quality of the electromagnetic expansion valve, thus enhancing product competitiveness.

[0049] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for manufacturing an electromagnetic expansion valve, comprising a base plate (1), wherein a detection mechanism is provided on the base plate (1), and a column (2) is provided at each of the four corners of the upper surface of the base plate (1). A mounting plate (3) is installed at the top of the column (2), and a fixing frame (4) is fixedly provided on the upper surface of the mounting plate (3). A ring frame (7) is provided at the top of the fixing frame (4). A circular fixing plate (8) is connected to the inner surface of the ring frame (7) by a connecting rod. A drive motor I (9) is provided on the upper surface of the fixing plate (8). The output shaft of the drive motor I (9) passes through the lower surface of the fixing plate (8) and is fixedly connected to a rotating rod (10). The end of the ring frame (7) is provided with a rotating block (11), and the inner surface of the ring frame (7) is provided with an annular groove (12). The rotating block (11) is slidably disposed in the annular groove (12), and the lower surface of the rotating block (11) is provided with an electric push rod (13). The lower surface of the movable end of the electric push rod (13) is provided with a lifting seat (14). The side surface of the lifting seat (14) away from the drive motor I (9) is equipped with a drive motor II (16). The output shaft of the drive motor II (16) passes through the side surface of the lifting seat (14) and is connected to the rotating seat (15). The rotating seat (15) is provided with a clamping component for clamping and fixing the body of the expansion valve. The feature is that: The middle side surface of the fixed frame (4) is provided with a U-shaped connecting frame (5), and a U-shaped support frame (6) is fixedly provided on the side surface of the connecting frame (5) facing the drive motor I (9). The inner diameter of the support frame (6) is smaller than the outer diameter of the expansion valve body and larger than the outer diameter of the lower interface of the expansion valve. The clamping component includes two arc-shaped clamping rings (20) with concave surfaces facing each other. The side surface of the rotating seat (15) has two symmetrically opened slide grooves (18). The two clamping rings (20) are slidably arranged in one of the slide grooves (18). The outer surface of the rotating seat (15) is equipped with a drive motor III (17). The output shaft of the drive motor III (17) passes into the slide groove (18) and is connected to the drive screw (19) through a coupling. The drive screw (19) is threadedly connected to the screw hole opened on the clamping ring (20). The two sections of the drive screw (19) in the two slide grooves (18) have opposite thread directions, and the screw holes opened on the two clamping rings (20) also have opposite thread directions. The detection mechanism includes an air pump (24) installed on the upper surface of the base plate (1). The air outlet of the air pump (24) is connected to an air inlet pipe (25). An electromagnetic valve is installed on the air inlet pipe (25). The air inlet pipe (25) extends out of the upper surface of the mounting plate (3) and is coaxially arranged with the output shaft of the drive motor I (9). An air outlet pipe (26) is provided on the upper surface of the mounting plate (3). The air outlet pipe (26) extends out of the lower surface of the mounting plate (3) and is connected to an air bag (31). A barometer (32) is provided on the air bag (31). A T-shaped fixing block (34) is fixedly installed in the middle of the inner surface of the air outlet pipe (26). Two semi-circular elastic plates (35) are symmetrically arranged on both sides of the bottom end of the fixing block (34). A spring (36) is installed at each of the top ends of the fixing block (34). The two springs (36) are respectively connected to the upper surface of the two elastic plates (35).

2. The tooling for manufacturing an electromagnetic expansion valve according to claim 1, characterized in that: The inner surface of the clamp (20) is provided with an anti-slip pad (21).

3. The tooling for manufacturing an electromagnetic expansion valve according to claim 1, characterized in that: The upper surface of the mounting plate (3) is provided with welding gun holder I (22) and welding gun holder II (23).

4. The tooling for manufacturing an electromagnetic expansion valve according to claim 1, characterized in that: Both the upper surface of the air inlet pipe (25) and the upper surface of the air outlet pipe (26) are provided with annular grooves (27).

5. The electromagnetic expansion valve manufacturing fixture according to claim 4, characterized in that: The inner surface of the slot (27) is uniformly provided with a number of sealing rings (28).

6. The tooling for manufacturing an electromagnetic expansion valve according to claim 1, characterized in that: The bottom outer side of the air outlet pipe (26) is connected to a threaded cylinder (29) by a thread, and an annular groove (30) is opened on the lower outer surface of the air outlet pipe (26). The top of the airbag (31) is provided with an elastic ring (33) that matches the groove (30).

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