A solenoid valve seat welding device and process thereof

Abstract

The present invention belongs to the technical field of automobile equipment welding, and discloses a solenoid valve seat welding device and a process thereof, including a tightening mechanism and a fixing mechanism, a positioning shaft is fixedly connected to a rotating disk, a positioning column is slidably connected to the upper part of the positioning shaft, and a first reset spring is fixedly connected between the positioning column and the inner wall of the positioning shaft; a moving cylinder is provided on a frame, a rotating cylinder is provided inside the moving cylinder, a positioning cylinder is slidably connected to the rotating cylinder, a push rod is fixedly connected to the positioning cylinder, a positioning block is slidably connected to the outer arc surface of the positioning column, a sliding groove for the push rod to slide is provided on the positioning column, and the push rod can push the positioning block to move in a direction away from the central axis of the positioning column after entering the sliding groove, a push rod is fixedly connected to the moving cylinder, and a push block is slidably connected to the positioning cylinder, and when the push rod slides, the push block can be pushed to move in a direction away from the central axis of the positioning cylinder and press against the valve housing. The present invention has the effect of improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of automobile equipment welding, and in particular to a solenoid valve seat welding device and a process thereof. Background Art

[0002] Electromagnetic shock absorber is a new type of intelligent independent suspension system that uses electromagnetic reaction. It uses multiple sensors to detect road conditions and various driving conditions, transmits them to the electronic controller ECU, and controls the electromagnetic shock absorber to react instantly, suppress vibration, and maintain vehicle body stability, especially when the vehicle speed is very high and suddenly encounters obstacles.

[0003] Compared with traditional shock absorbers, electromagnetic shock absorbers mainly have two additional parts: cylinder body and solenoid valve. During the production process, the cylinder body and valve housing need to be welded. At present, the welding of the two is mainly done by manually loading the cylinder body and placing the cylinder body on the cylinder body positioning shaft. At the same time, the material is taken from the small material box of the valve housing and placed on the valve seat positioning tooling. The valve seat positioning tooling is manually pushed to fit the valve housing to the outer wall of the cylinder body. The equipment adopts vertical displacement and external shaft motor drive to realize automatic flipping of the workpiece with the center of the valve housing hole as the axis and start welding through the welding robot. After welding is completed, the material is manually unloaded.

[0004] Referring to the Chinese patent application document with publication number CN118905489A, a welding device for automobile shock absorber production is disclosed. By setting a mounting sleeve, the contact length between the mounting sleeve and the automobile shock absorber sleeve can be extended, and the swing problem of the automobile shock absorber sleeve during the welding process can be reduced. By setting an adjusting mechanism, the insertion length of the automobile shock absorber sleeve on the mounting sleeve can be adjusted, and it can adapt to the welding operation of automobile shock absorber sleeves of different length specifications.

[0005] With regard to the above-mentioned related technologies, most of the cylinder positioning tools are currently used to position the cylinder. After the cylinder is positioned, it is necessary to manually rotate the cylinder so that the welding hole on the cylinder is coaxial with the valve housing, and then the cylinder is welded to the solenoid valve seat by a welding robot, thereby increasing the workload of the workers and resulting in low production efficiency. Moreover, when processing cylinders of different specifications, the cylinder positioning shaft needs to be replaced, which also affects production efficiency. Summary of the invention

[0006] In view of this, the present invention provides a solenoid valve seat welding device and a process thereof, aiming to solve the problem of low efficiency in the welding process of the cylinder body and the valve housing in the prior art.

[0007] To solve the above technical problems, in the first aspect, the present invention provides a solenoid valve seat welding device and, comprising a frame, a welding robot, a rotating disk rotatably connected to the frame, a tightening mechanism for pressing the valve housing against the cylinder body, and a fixing mechanism for fixing the position of the cylinder body, wherein the rotating disk is fixedly connected with a positioning shaft, a positioning column is laterally slidably connected with the upper part of the positioning shaft, and a first reset spring is fixedly connected between the positioning column and the inner wall of the positioning shaft; a moving cylinder is provided on the frame, and the tightening mechanism is used to drive the moving cylinder to move, and a rotating cylinder is provided in the moving cylinder, and the end of the rotating cylinder close to the positioning shaft is slidably connected with the positioning cylinder, and the end of the positioning cylinder close to the positioning shaft is fixedly connected with a push rod, and a positioning block is slidably connected on the outer arc surface of the positioning column, and a sliding groove for sliding the push rod is provided on the positioning column, and after the push rod enters the inner part of the sliding groove, the positioning block can be pushed to move in a direction away from the central axis of the positioning column, and the push rod is fixedly connected with the end of the moving cylinder close to the positioning shaft, and a push block is slidably connected with the outer arc surface of the positioning cylinder, and when the push rod slides, the push block can be pushed to move in a direction away from the central axis of the positioning cylinder and press against the valve housing.

[0008] By adopting the above technical scheme, the cylinder body will squeeze the positioning column and retract into the positioning shaft during the process of being sleeved on the positioning shaft. As the cylinder body moves, the positioning column will extend into the welding hole of the cylinder body under the action of the first return spring, thereby performing preliminary positioning of the cylinder body, and then the valve housing will move in the direction close to the cylinder body. Through the setting of the push rod and the positioning block, the positioning block can be pressed against the cylinder body, thereby accurately positioning the cylinder body. At the same time, during the contact between the valve housing and the cylinder body, if the welding holes of the valve housing and the cylinder body are not aligned, the valve housing will be rotated under the action of the arc surface of the valve housing and the arc surface of the cylinder body, thereby aligning the welding holes of the valve housing and the cylinder body. Then the positioning column pushes the positioning cylinder to move. During the movement of the positioning cylinder, the push block extends out of the positioning cylinder and presses against the valve housing and positions it through the cooperation of the push rod and the push block. The cylinder body can be quickly positioned through preliminary positioning, which is beneficial to improving the production efficiency of the product. Then, during the alignment of the valve housing and the cylinder body, it can be accurately positioned again, and the valve housing is positioned at the same time, thereby improving the production efficiency of the product.

[0009] Optionally, the positioning block includes a moving block and a pressing block, a second return spring is fixedly connected between the moving block and the positioning column, and a supporting spring is fixedly connected between the moving block and the pressing block.

[0010] By adopting the above technical solution, the setting of the second reset spring can enable the moving block to drive the clamping block to reset after welding is completed, and the setting of the supporting spring can apply a thrust to the clamping block to facilitate the clamping block to position against the cylinder body.

[0011] Optionally, a limiting block for limiting the movement of the positioning column is vertically slidably connected in the positioning shaft.

[0012] By adopting the above technical solution, the setting of the limiting block can limit the positioning column during the welding process to reduce the probability that its movement affects the welding.

[0013] Optionally, the tightening mechanism includes a second rotation source mounted on the frame, a driving shaft of the second rotation source is fixedly connected to a driving screw, a moving frame is threadedly connected to the driving screw, and the moving cylinder is rotatably connected to the moving frame.

[0014] By adopting the above technical solution, the two clamping blocks are close to each other to clamp the upper part of the cylinder body, and the inner wall of the lower part of the cylinder body can be tightened by the tightening block to fix the position of the cylinder body, which is conducive to welding.

[0015] Optionally, the fixing mechanism includes a first rotation source mounted on a rotating disk, a driving shaft of the first rotation source fixedly connected to a bidirectional lead screw, both sides of the bidirectional lead screw are threadedly connected to clamping blocks for clamping the upper part of the cylinder body, and the lower part of the positioning shaft is laterally slidably connected to a tightening block.

[0016] By adopting the above technical solution, the movable frame is driven to move by the lead screw slider mechanism so that the valve housing can be moved toward the cylinder body, so as to facilitate the matching of the cylinder body and the valve housing.

[0017] Optionally, the rotating cylinder and the ejector rod are both hollow for introducing nitrogen, and a removal mechanism is provided on the frame for cleaning the oxide scale produced after welding.

[0018] By adopting the above technical solution, the introduction of nitrogen can reduce the oxide scale generated during the welding process, and then the internal oxide scale can be cleaned through the removal mechanism to improve product quality.

[0019] Optionally, the removal mechanism includes a first scraper arranged on the push block, a third rotation source is installed on the movable frame, the third rotation source can drive the rotating cylinder to rotate through gear transmission, the outer wall of the positioning shaft is rotatably connected to a rotating ring, a second scraper for removing oxide scale inside the cylinder body is fixedly connected to the side wall of the rotating ring, an impeller is fixedly connected to the bottom of the rotating ring, and the impeller is rotated by passing air flow into the impeller.

[0020] By adopting the above technical solution, the rotation of the rotating cylinder can drive the positioning cylinder and the first scraper to rotate, so that the oxide scale close to the valve shell can be removed. By rotating the second scraper, the oxide scale on the inner wall of the cylinder body can be removed during the process of pulling out the welded workpiece, which is beneficial to improving product quality.

[0021] Optionally, a ball is rotatably connected to a side of the movable cylinder close to the valve housing.

[0022] By adopting the above technical solution, the provision of the ball bearings can reduce the friction force when the valve housing rotates, which is beneficial to the rotation of the valve housing.

[0023] Optionally, a third return spring is fixedly connected between the positioning cylinder and the rotating cylinder.

[0024] By adopting the above technical solution, the provision of the third reset spring can reset the positioning cylinder after welding is completed, so as to facilitate the tight positioning of the next valve housing.

[0025] In a second aspect, the present invention provides a solenoid valve seat welding process, which is applied to a solenoid valve welding device in the first aspect, and the process is:

[0026] S1, sleeve the cylinder body onto the outside of the positioning shaft, perform preliminary positioning of the cylinder body through the positioning column, place the valve housing onto the outside of the positioning cylinder and move the valve housing toward the cylinder body;

[0027] S2, the push rod pushes the positioning block to move and reposition the cylinder body. The valve housing contacts the cylinder body during the movement. As the valve housing continues to move, the valve housing rotates and aligns with the welding hole of the cylinder body. At the same time, the push rod and the push block tighten the valve housing to position it;

[0028] S3, fix the position of the cylinder body by means of a clamping block and a tightening block, then rotate the rotating disk, and weld the connection between the cylinder body and the valve housing by means of a welding robot when the rotating disk rotates;

[0029] S4, removing the oxide scale produced after welding by the first scraper and the second scraper.

[0030] By adopting the above technical solution, the cylinder body can be initially and quickly positioned, and then the cylinder body can be accurately positioned again during the process of matching the cylinder body and the valve housing, and the valve housing can be positioned at the same time, which is conducive to improving production efficiency.

[0031] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0032] 1. By quickly positioning the cylinder body initially, and then accurately positioning the cylinder body again in the process of matching the cylinder body with the valve housing, the valve housing can also be tightly positioned, which is conducive to improving production efficiency;

[0033] 2. The first scraper and the second scraper cooperate with the positioning of the cylinder body and the valve housing, so that the oxide scale produced after welding can be cleaned, which is beneficial to improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the assembly of the positioning shaft and the positioning column according to an embodiment of the present invention;

[0036] Figure 3 A cross-sectional view of a positioning shaft according to an embodiment of the present invention;

[0037] Figure 4 For the embodiment of the present invention Figure 3 A partial enlarged view of the middle area A;

[0038] Figure 5 It is a schematic structural diagram of the push rod and push block assembly according to an embodiment of the present invention.

[0039] Explanation of the accompanying drawings: 1. frame; 11. rotating disk; 2. tightening mechanism; 21. second rotation source; 22. driving screw; 23. moving frame; 3. fixing mechanism; 31. first rotation source; 32. bidirectional screw; 33. clamping block; 34. tightening block; 4. positioning shaft; 41. positioning column; 42. first return spring; 43. moving cylinder; 431. ball; 44. rotating cylinder; 45. positioning cylinder; 451. third return spring; 46. push rod; 47. positioning block; 471. moving block; 472. tightening block; 473. second return spring; 474. supporting spring; 48. slide groove; 5. push rod; 51. push block; 6. limiting block; 7. removal mechanism; 71. first scraper; 72. third rotation source; 73. rotating ring; 74. second scraper; 75. impeller. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 5 , a clear and complete description of the technical solutions of the embodiments of the present invention is given. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0041] In a first aspect, the present invention provides a solenoid valve seat welding device.

[0042] Reference Figure 1A solenoid valve welding device includes a frame 1, a welding robot, a rotating disk 11 rotatably connected to the frame 1, a first positioning mechanism for positioning a cylinder body, a second positioning mechanism for positioning a valve housing, a fixing mechanism 3 for fixing the position of the cylinder body, and a tightening mechanism 2 for pressing the valve housing against the cylinder body. The frame 1 is placed on a horizontal plane, the welding robot is used to weld the connection between the cylinder body and the valve housing, which is well known to those skilled in the art and will not be described in detail here. The rotating disk 11 can rotate under the drive of a welding positioner, and the welding positioner is a device used to drag the workpiece to be welded so that the weld to be welded moves to an ideal position for welding, which is well known to those skilled in the art and will not be described in detail here.

[0043] Reference Figure 2 , Figure 3 and Figure 4 The first positioning mechanism is arranged on the rotating disk 11, and the first positioning mechanism includes a positioning shaft 4, a positioning column 41, a first return spring 42, a positioning block 47, a push rod 46 and a slide groove 48. The positioning shaft 4 is fixedly connected to the rotating disk 11, and the positioning column 41 is slidably connected to the upper part of the positioning shaft 4 in a transverse direction. A limiting block 6 for limiting the movement of the positioning column 41 is vertically slidably connected in the positioning shaft 4 to prevent the movement of the positioning column 41 during welding. One end of the positioning column 41 extending out of the positioning shaft 4 is set as a hemispherical surface, so that when the cylinder body is sleeved on the positioning shaft 4, the positioning shaft 4 can squeeze the positioning column 41 to retract into the positioning shaft 4. The first return spring 42 is fixedly connected between the positioning column 41 and the positioning shaft 4, and the positioning block 47 is slidably connected to the positioning column 41. On the side wall of the positioning column 41, the positioning block 47 includes a moving block 471 and a clamping block 472. The clamping block 472 can extend out of the positioning column 41. A second return spring 473 is fixedly connected between the moving block 471 and the positioning column 41 to reset the moving block 471 and the clamping block 472 when the push rod 46 disengages from the slide groove 48. A support spring 474 is fixedly connected between the moving block 471 and the clamping block 472 to apply a thrust to the clamping block 472 for clamping. The slide groove 48 is opened at the central axis position of the positioning column 41. The push rod 46 enters the slide groove 48 to push the moving block 471 and the clamping block 472 to move in a direction away from the central axis of the positioning column 41, so that the clamping block 472 presses against the cylinder body for positioning.

[0044] Reference Figure 2 and Figure 5 The second positioning mechanism includes a moving cylinder 43, a rotating cylinder 44, a positioning cylinder 45, a push rod 5 and a push block 51. The moving cylinder 43 can be in the pressing mechanism 2 (refer to Figure 1), the moving cylinder 43 is rotatably connected with a ball 431 for assisting the rotation of the valve housing, the rotating cylinder 44 is rotatably connected to the inside of the moving cylinder 43, the positioning cylinder 45 is slidably connected to the side of the rotating cylinder 44 close to the positioning shaft 4, a third reset spring 451 is fixedly connected between the positioning cylinder 45 and the rotating cylinder 44, the valve housing is sleeved on the positioning cylinder 45, the push rod 46 is fixedly connected to the side of the positioning cylinder 45 close to the positioning shaft 4, and when the rotating cylinder 44 rotates, the positioning cylinder 45 can be driven to rotate through the keyway structure, and the push rod 5 is fixedly connected to the side of the moving cylinder 43 close to the positioning cylinder 45, the push rod 5 is provided with a push inclined surface, the push block 51 is vertically slidably connected to the outer wall of the positioning cylinder 45, and a spring is provided between the push block 51 and the positioning cylinder 45 to facilitate the reset of the push block 51, and the push rod 5 is provided with a push receiving inclined surface adapted to the push inclined surface. When the push block 51 moves in the direction close to the moving cylinder 43, under the action of the push inclined surface and the push receiving inclined surface, the push block 51 can be moved in the direction away from the positioning cylinder 45, so that the push block 51 is pressed against the valve housing for positioning.

[0045] Reference Figure 1 The clamping mechanism 2 includes a second rotation source 21, a driving screw 22 and a moving frame 23. The second rotation source 21 is fixedly mounted on the frame 1. In this embodiment, the second rotation source 21 is a motor. In other embodiments, the second rotation source 21 can be a device such as a hydraulic motor or a rotary cylinder whose drive shaft can rotate. The driving screw 22 is fixedly connected to the drive shaft of the second rotation source 21, and the moving frame 23 is threadedly connected to the driving screw 22, and the moving cylinder 43 is rotatably connected to the moving frame 23. Starting the second rotation source 21 drives the driving screw 22 to rotate, and the rotation of the driving screw 22 can drive the moving frame 23 to move, so that the valve housing is close to the cylinder body.

[0046] Reference Figure 1 and Figure 3 The fixing mechanism 3 includes a first rotation source 31, a bidirectional screw 32, a clamping block 33 and a tightening block 34. The first rotation source 31 is fixedly mounted on the rotating disk 11, the bidirectional screw 32 is fixedly connected to the driving shaft of the first rotation source 31, the clamping block 33 is threadedly connected to the two sides of the bidirectional screw 32, and the clamping block 33 has a groove adapted to the cylinder body. Starting the first rotation source 31 can drive the bidirectional screw 32 to rotate, so that the two clamping blocks 33 are close to each other to clamp the upper part of the cylinder body, and the tightening block 34 is laterally slidably connected to the lower part of the positioning shaft 4. By introducing hydraulic oil or airflow, the tightening block 34 can be moved in a direction away from the central axis of the positioning shaft 4, so that the tightening block 34 presses the lower part of the cylinder body, and the clamping block 33 and the tightening block 34 cooperate with each other to fix the position of the cylinder body for welding.

[0047] Reference Figure 2 , Figure 4 and Figure 5The rotating cylinder 44 and the push rod 46 are both hollow inside, so that nitrogen can be introduced into the cylinder body and the valve housing to reduce the generation of oxide scale. The frame 1 is provided with a removal mechanism 7 for removing the oxide scale generated after welding. The removal mechanism 7 includes a first scraper 71, a third rotating source 72, a first gear, a second gear, a rotating ring 73, a second scraper 74 and an impeller 75. The first scraper 71 is slidably connected to the push block 51 in a transverse direction, and a spring is fixedly connected between the first scraper 71 and the push block 51 to provide a movable margin for the first scraper 71 to reduce the probability of interference. The third rotating source 72 is fixedly installed on the moving frame 23, and the first gear meshes with the second gear. The second gear is meshed with the first gear, the rotating cylinder 44 is fixedly connected to the center of the second gear, the second scraper 74 can remove the oxide scale in the valve housing when it rotates, the rotating ring 73 is rotatably connected to the side wall of the positioning shaft 4 above the positioning column 41, the second scraper 74 is fixedly connected to the outer side wall of the rotating ring 73, and the impeller 75 is fixedly connected to the bottom of the rotating ring 73. The impeller 75 can be driven to rotate by passing hydraulic oil or airflow, so that the impeller 75 drives the second scraper 74 to rotate. When taking out the welded workpiece, the rotating second scraper 74 can remove the oxide scale inside the cylinder.

[0048] The implementation principle of the electromagnetic valve seat welding device of the embodiment of the present invention is as follows: first, the cylinder body is sleeved on the positioning shaft 4, and the cylinder body squeezes the positioning column 41 and retracts it into the positioning shaft 4. When the welding hole of the cylinder body moves to the position of the positioning column 41, the positioning column 41 will pop out and extend from the welding hole of the cylinder body to perform preliminary positioning of the cylinder body. As the valve shell moves, the valve shell will be aligned with the welding hole of the cylinder body, and then the moving cylinder 43 will move in the direction close to the positioning shaft 4, and the push rod 46 will enter the slide groove 48, and then the push rod 46 will push the moving block 471 and the tight The block 472 moves around to tightly position the cylinder body. At the same time, the positioning column 41 contacts the positioning cylinder 45 and moves the positioning cylinder 45 away from the positioning axis 4, so that the push rod 5 abuts against the push block 51. The push block 51 moves around under the action of the push rod 5 to tightly position the valve housing. Then, the two clamping blocks 33 are brought close to each other to clamp the upper part of the cylinder body, and air flow is introduced to make the tightening block 34 tighten the lower part of the cylinder body. Then, the rotating disk 11 is rotated and the connection between the cylinder body and the valve housing is welded by a welding robot.

[0049] After welding is completed, the third rotation source 72 is started to rotate the second scraper 74 to remove the oxide scale in the valve housing, and then the second scraper 74 is withdrawn. At the same time, air flow is introduced into the impeller 75 so that the impeller 75 drives the second scraper 74 to rotate. In the process of removing the workpiece, the second scraper 74 can remove the oxide scale in the cylinder body.

[0050] In a second aspect, the present invention provides a solenoid valve seat welding process, which is applied to a solenoid valve welding device in the first aspect, and the process is:

[0051] S1, sleeve the cylinder body onto the outside of the positioning shaft 4, perform preliminary positioning of the cylinder body through the positioning column 41, place the valve housing onto the outside of the positioning cylinder 45 and move the valve housing toward the cylinder body;

[0052] S2, the push rod 46 pushes the positioning block 47 to move and reposition the cylinder body. The valve housing contacts the cylinder body during the movement. As the valve housing continues to move, the valve housing rotates and aligns with the welding hole of the cylinder body. At the same time, the push rod 5 and the push block 51 push the valve housing to position it.

[0053] S3, fix the position of the cylinder body by the clamping block 33 and the tightening block 34, then rotate the rotating disk 11, and weld the connection between the cylinder body and the valve housing by the welding robot when the rotating disk 11 rotates;

[0054] S4, using the first scraper 71 and the second scraper 74 to remove the oxide scale produced after welding.

[0055] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A solenoid valve seat welding device, comprising a frame, a welding robot, a rotating disk rotatably connected to the frame, a tightening mechanism for pressing the valve housing against the cylinder body, and a fixing mechanism for fixing the position of the cylinder body, characterized in that: The rotating disk is fixedly connected with a positioning shaft, the upper part of the positioning shaft is laterally slidably connected with a positioning column, and a first return spring is fixedly connected between the positioning column and the inner wall of the positioning shaft; The frame is provided with a moving cylinder, and the tightening mechanism is used to drive the moving cylinder to move. A rotating cylinder is provided in the moving cylinder, and one end of the rotating cylinder close to the positioning shaft is slidably connected to the positioning cylinder, and one end of the positioning cylinder close to the positioning shaft is fixedly connected to a push rod, and a positioning block is slidably connected to the outer arc surface of the positioning column, and a sliding groove for the push rod to slide is provided on the positioning column, and the push rod can push the positioning block to move in a direction away from the central axis of the positioning column after entering the sliding groove; The positioning block includes a moving block and a pressing block, a second return spring is fixedly connected between the moving block and the positioning column, and a supporting spring is fixedly connected between the moving block and the pressing block; The end of the moving cylinder close to the positioning shaft is fixedly connected with a push rod, and the outer arc surface of the positioning cylinder is slidably connected with a push block, and when the push rod slides, it can push the push block to move away from the central axis of the positioning cylinder and press against the valve housing; The tightening mechanism includes a second rotating source mounted on the frame, a driving shaft of the second rotating source is fixedly connected to a driving screw, a moving frame is threadedly connected to the driving screw, and a moving cylinder is rotatably connected to the moving frame; The rotating cylinder and the push rod are both hollow and used for introducing nitrogen. A removal mechanism is provided on the frame, and the removal mechanism is used to clean the oxide scale generated after welding; the removal mechanism includes a first scraper arranged on the push block, and a third rotation source is installed on the movable frame. The third rotation source can drive the rotating cylinder to rotate through gear transmission. The outer wall of the positioning shaft is rotatably connected with a rotating ring, and a second scraper for removing the oxide scale inside the cylinder body is fixedly connected to the side wall of the rotating ring. An impeller is fixedly connected to the bottom of the rotating ring, and the impeller is rotated by introducing air flow into the impeller.

2. The electromagnetic valve seat welding device according to claim 1, characterized in that: A limiting block for limiting the movement of the positioning column is vertically slidably connected in the positioning shaft.

3. The electromagnetic valve seat welding device according to claim 1, characterized in that: The fixing mechanism includes a first rotating source installed on a rotating disk, a driving shaft of the first rotating source is fixedly connected with a bidirectional lead screw, both sides of the bidirectional lead screw are threadedly connected with clamping blocks for clamping the upper part of the cylinder body, and the lower part of the positioning shaft is laterally slidably connected with a tightening block.

4. The electromagnetic valve seat welding device according to claim 1, characterized in that: A ball is rotatably connected to one side of the moving cylinder close to the valve housing.

5. The electromagnetic valve seat welding device according to claim 1, characterized in that: A third return spring is fixedly connected between the positioning cylinder and the rotating cylinder.

6. A solenoid valve seat welding process, characterized in that: The electromagnetic valve seat welding device used in claim 3 has the following process: S1, sleeve the cylinder body onto the outside of the positioning shaft, perform preliminary positioning of the cylinder body through the positioning column, place the valve housing onto the outside of the positioning cylinder and move the valve housing toward the cylinder body; S2, the push rod pushes the positioning block to move and reposition the cylinder body. The valve housing contacts the cylinder body during the movement. As the valve housing continues to move, the valve housing rotates and aligns with the welding hole of the cylinder body. At the same time, the push rod and the push block tighten the valve housing to position it; S3, fix the position of the cylinder body by means of a clamping block and a tightening block, then rotate the rotating disk, and weld the connection between the cylinder body and the valve housing by means of a welding robot when the rotating disk rotates; S4, removing the oxide scale produced after welding by the first scraper and the second scraper.

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