Valve body welding forming device

Abstract

The invention relates to the technical field of welding machining, in particular to a valve body welding forming device which comprises a rack, an electromagnetic coil and a core wire, the rack mainly plays a supporting role, and a pushing structure is arranged on the rack and used for pushing the electromagnetic coil to move up and down. The electromagnetic coil is used for heating the butt joint position of the two to-be-welded parts, the two to-be-welded parts are in vertical butt joint and placed on the rack, the core wire is located between the two to-be-welded parts, and the cross section of the core wire is square; the welding core with the filling groove is used for filling the gap between the two butt-joint parts to be welded, it is guaranteed that the welded parts can be fully fused after being heated, and therefore the strength and sealing performance of the welded parts are improved, the welding core can provide filler on the inner side and the outer side of the butt-joint position of the parts to be welded, and the welding core is not prone to falling off. The problem that only the outer surface can be welded in a traditional welding mode is solved, and welding comprehensiveness is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, in particular to a valve body welding forming device. Background Art

[0002] With the continuous improvement of industrial automation level, valves, as an important component of fluid control systems, play an indispensable role in many industries such as chemical, petroleum, natural gas, and electric power. The quality of valves directly affects the safety and reliability of the system, and the valve body, as one of the core components of the valve, the quality of its manufacturing process is directly related to the overall performance of the valve.

[0003] In the traditional valve manufacturing process, welding is an important step in its processing technology, especially in the processing of large ball valves. Two independent valve body components can be processed into a complete valve body through welding. The commonly used welding method is to butt the two components, and then the workers use welding rods to weld the weld. In this process, the workers need to move around the weld trajectory to complete the comprehensive welding work. This welding method can only weld the outer surface of the weld, and cannot effectively weld the middle or inner side of the weld, resulting in poor welding strength and poor sealing. At the same time, this welding method is slow and has low work efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a valve body welding forming device, the specific technical solution adopted by the present invention is: According to a first aspect of the present invention, a valve body welding forming device is provided, comprising a frame, an electromagnetic coil and a welding core, wherein the frame mainly plays a supporting role, a pushing structure is arranged on the frame, the pushing structure is used to push the electromagnetic coil to move up and down, and the electromagnetic coil is used to heat the butt joint position of two parts to be welded, the two parts to be welded are vertically butt jointed and placed on the frame, the welding core is located between the two parts to be welded, the cross-sectional shape of the welding core is square, and a filling groove is opened on each side of the square, and the filling groove is filled with flux; When the electromagnetic coil heats the component to be welded, the welding core and the flux, the flux ignites the welding core and the position to be welded on the component to be welded.

[0005] Furthermore, the frame is provided with a clamping structure for fixing two parts to be welded; The clamping structure includes a core barrel fixed on the frame, the part to be welded is sleeved on the outside of the core barrel, three rotating barrels are rotatably arranged on the inner wall of the core barrel, the three rotating barrels are coaxially arranged vertically, and a notch is opened on the outer wall of the core barrel corresponding to each rotating barrel, wherein the upper and lower rotating barrels are each provided with a first clamping group, the first clamping group is used to fix the part to be welded, and the middle rotating barrel is provided with a second clamping group, the second clamping group is used to fix the welding core; The first clamping group includes multiple extrusion plates and two gears rotatably arranged on one surface of each extrusion plate, the two gears are meshed with each other, and the other surface of the extrusion plate is used to extrude the parts to be welded. A first push-pull arm is fixed on each gear, one first push-pull arm is rotatably mounted on the outer wall of the core barrel, and the other first push-pull arm passes through the slot and is rotatably mounted on the rotating barrel.

[0006] Furthermore, a right-angle pressing plate is slidably inserted into each extrusion plate in the first clamping group on the upper side, and the right-angle pressing plate is used to press down the top of the upper part to be welded among the two parts to be welded.

[0007] Further, the second clamping group includes a plurality of fixed sleeves fixed on the outer wall of the core barrel, the fixed sleeves are along the radial direction of the core barrel, a movable sleeve is slidably arranged in the fixed sleeves, a pressing column is slidably arranged in the movable sleeves, and the movable sleeves are connected to the pressing column by a first spring, the end of the movable sleeve extends out of the fixed sleeves, the end of the pressing column extends out of the movable sleeves, and the end of the pressing column is used to extrude and fix the welding core; A second push-pull arm is rotatably provided on the movable sleeve, and the second push-pull arm passes through the notch corresponding to the middle rotating drum and is rotatably connected to the middle rotating drum; When the second push-pull arm is parallel to the movable sleeve, the movable sleeve moves outward on the fixed sleeve to a maximum distance.

[0008] Furthermore, a core column is coaxially arranged in the core barrel, and the core column is rotatably mounted on the frame. A plurality of second springs are fixed on the inner wall of each rotating barrel, and the second springs are fixedly connected to the core column.

[0009] Furthermore, a first threaded rod is inserted into the top of the core column, the first threaded rod is threadedly connected to the core column, a plurality of connecting plates are arranged on the outer wall of the first threaded rod, a telescopic rod is rotatably arranged on each connecting plate, and the movable end of the telescopic rod is fixed on the right-angle pressure plate.

[0010] Furthermore, a round cover is buckled on the bottom of the frame, the bottom of the core column is inserted into the round cover, and two partitions are arranged on the outer wall of the core column inside the round cover. The two partitions divide the internal space of the round cover, one of the partitions is fixed on the inner wall of the round cover, and two oil pipes are arranged on both sides of the partition, and the other partition is fixedly connected to the core column.

[0011] Furthermore, the pushing structure includes a moving seat vertically slidably mounted on the frame and a motor fixed on the frame, a second threaded rod is provided at the output end of the motor, the second threaded rod passes through the moving seat and is threadedly connected to each other, and the electromagnetic coil is fixed on the moving seat.

[0012] The beneficial effects of the present invention are: By using a welding core with a filling groove to fill the gap between the two butted parts to be welded, it is ensured that the welding part can be fully fused after heating, thereby improving the strength and sealing of the welding part, and the design of the welding core enables it to provide fillers on both the inner and outer sides of the butt joint of the parts to be welded, which solves the problem that only the outer surface can be welded in the traditional welding method and ensures the comprehensiveness of the welding; compared with traditional manual welding, the device allows the welding core to be melted and welded as a whole at the same time, greatly reducing the time required to complete the entire welding process and improving work efficiency; as a disposable consumable, the welding core can be processed in a prefabricated manner, which is convenient and fast, and reduces the difficulty of pre-production preparation work; in summary, this new type of valve body welding forming device significantly improves the efficiency, reliability and economy of welding by introducing an automated heating and filling system, which has positive significance for improving the overall technical level of the valve manufacturing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure viewed from above; Figure 3 is a schematic diagram of the structure of the components to be welded in an embodiment of the present invention; Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of the middle welding core; Figure 5 yes Figure 3 Schematic diagram of the core tube structure; Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the core tube; Figure 7 yes Figure 5 Schematic diagram of the structure of the middle extruded plate; Figure 8 yes Figure 5 A schematic diagram of the structure of the middle movable sleeve; Fig. 9 yes Figure 2 Schematic diagram of the structure of the middle dome.

[0015] Reference numerals: 1. Frame; 2. Electromagnetic coil; 3. Parts to be welded; 4. Welding core; 5. Welding flux; 6. Core barrel; 7. Rotating barrel; 8. Extrusion plate; 9. First push-pull arm; 10. Gear; 11. Right-angle pressure plate; 12. Fixed sleeve; 13. Movable sleeve; 14. Extrusion column; 15. First spring; 16. Second push-pull arm; 17. Core column; 18. Second spring; 19. First threaded rod; 20. Connecting plate; 21. Telescopic rod; 22. Round cover; 23. Partition; 24. Oil pipe; 25. Moving seat; 26. Motor; 27. Second threaded rod. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, 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 integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0019] like Figures 1 to 9As shown, a valve body welding forming device of the present invention comprises a frame 1, an electromagnetic coil 2 and a welding core 4, wherein the frame 1 mainly plays a supporting role, and a pushing structure is arranged on the frame 1, wherein the pushing structure is used to push the electromagnetic coil 2 to move up and down, and the electromagnetic coil 2 is used to heat the butt joint position of two parts to be welded 3, the two parts to be welded 3 are vertically butt jointed and placed on the frame 1, and the welding core 4 is located between the two parts to be welded 3, and the cross-sectional shape of the welding core 4 is a square, and a filling groove is opened on each side of the square, and the filling groove is filled with flux 5; When the electromagnetic coil 2 heats the component to be welded 3 , the welding core 4 and the welding flux 5 , the welding flux 5 ignites the welding core 4 and the position to be welded on the component to be welded 3 .

[0020] In detail, after the two parts to be welded 3 are butt-welded, a complete valve body can be formed. The frame 1 is used to provide support for the pushing structure, the electromagnetic coil 2 and the parts to be welded 3. The pushing structure can push the electromagnetic coil 2 up and down, so that the electromagnetic coil 2 moves up to the working position or down to the idle position. When the two parts to be welded 3 are butt-welded, the welding core 4 needs to be placed between the two parts to be welded 3, so that the two parts to be welded 3 and the welding core 4 are arranged vertically. The circumferential outer wall, the circumferential inner wall and the upper and lower end surfaces of the welding core 4 are provided with filling grooves. The shape of the filling grooves is consistent with the shape of the welding core 4. The filling grooves are filled with flux 5. When alternating current is passed through the electromagnetic coil 2, eddy currents are generated inside the conductor when the alternating current passes through the electromagnetic coil 2. The eddy currents generate heat, thereby heating the conductor. Therefore, after the electromagnetic coil 2 is energized, the butt joint position of the two parts to be welded 3 and the welding core 4 can be heated, and the high temperature can ignite the flux 5, whereby the flux 5 releases a higher temperature to melt the welding core 4 and the position to be welded on the part 3 to be welded, so that the melting welding working mode of the butt joint position of the two parts 3 to be welded can be realized, and since this method utilizes the heating work of the electromagnetic coil 2, it can preheat the position to be welded on the part 3 to be welded, and since the welding core 4 is located between the two parts 3 to be welded, the position to be welded on the part 3 to be welded can be fully and effectively heated, thereby improving the comprehensiveness and strength of welding, and since this method is that the circular flux 5 on the welding core 4 can be ignited and release heat at the same time, the circular butt joint positions on the two parts 3 to be welded can be heated and welded at the same time, that is, different welding positions on the parts 3 to be welded can be welded at the same time, thereby improving the welding efficiency, and the method of filling the flux 5 on the four sides of the welding core 4 can ensure uniform temperature.

[0021] It should be pointed out that when filling the filling groove on the welding core 4 with flux 5, the welding core 4 can be directly placed on the liquid flux 5, so that the flux 5 naturally flows into the filling groove, and then dried and grinded off the excess flux 5 on the welding core 4. Since the welding core 4 is a disposable consumable, it can be prefabricated in advance for easy use.

[0022] By using a welding core 4 with a filling groove to fill the gap between the two butted parts to be welded 3, it is ensured that the welding part can be fully fused after heating, thereby improving the strength and sealing of the welding part, and the design of the welding core 4 allows it to provide fillers on both the inner and outer sides of the butt joint of the parts to be welded 3, which solves the problem that only the outer surface can be welded in the traditional welding method, ensuring the comprehensiveness of the welding; compared with traditional manual welding, the device allows the welding core 4 to melt and weld as a whole, greatly reducing the time required to complete the entire welding process and improving work efficiency; as a disposable consumable, the welding core 4 can be processed in a prefabricated manner, which is convenient and quick, and reduces the difficulty of pre-production preparation work; in summary, this new valve body welding forming device significantly improves the efficiency, reliability and economy of welding by introducing an automated heating and filling system, and has positive significance for improving the overall technical level of the valve manufacturing industry.

[0023] Furthermore, the frame 1 is provided with a clamping structure for fixing the two components 3 to be welded; The clamping structure includes a core barrel 6 fixed on the frame 1, the component to be welded 3 is sleeved on the outer side of the core barrel 6, three rotating barrels 7 are rotatably arranged on the inner wall of the core barrel 6, and the three rotating barrels 7 are coaxially arranged vertically. A notch is opened on the outer wall of the core barrel 6 corresponding to each rotating barrel 7, wherein the upper and lower rotating barrels 7 are each provided with a first clamping group, and the first clamping group is used to fix the component to be welded 3, and the middle rotating barrel 7 is provided with a second clamping group, and the second clamping group is used to fix the welding core 4; The first clamping group includes a plurality of extrusion plates 8 and two gears 10 rotatably arranged on one surface of each extrusion plate 8, the two gears 10 are meshed with each other, and the other surface of the extrusion plate 8 is used to extrude the component 3 to be welded, and a first push-pull arm 9 is fixed on each gear 10, one first push-pull arm 9 is rotatably mounted on the outer wall of the core cylinder 6, and the other first push-pull arm 9 passes through the slot and is rotatably mounted on the rotating cylinder 7.

[0024] In detail, the two parts to be welded 3 and the welding core 4 can be clamped and fixed by the clamping structure, thereby improving the welding stability and preventing the parts to be welded 3 from tilting and shifting when the welding core 4 and the welding position on the parts to be welded 3 melt. The core barrel 6 is vertically fixed on the frame 1, and the multiple extrusion plates 8 in the first clamping group are distributed in a ring shape. The first clamping group and the second clamping group on the core barrel 6 are both operated by rotating the rotating drum 7 in the core barrel 6, that is, when the rotating drum 7 rotates, it can push a first push-pull arm 9 on the extrusion plate 8 to move, and the two first push-pull arms 9 on the extrusion plate 8 are away from the two ends of the extrusion plate 8 and approach or Move away from the extrusion plate 8, at this time, the angle between the two first push-pull arms 9 gradually decreases or increases, and the two first push-pull arms 9 are used to push the extrusion plate 8 close to or away from the inner wall of the component 3 to be welded, thereby achieving the clamping and fixing work of the component 3 to be welded, and because the two first push-pull arms 9 are connected to the extrusion plate 8 through two gears 10, when the first push-pull arms 9 rotate relative to the extrusion plate 8, the gear 10 rotates on the extrusion plate 8, and the two first push-pull arms 9 move synchronously relative to each other, thereby making the clamping surface on the extrusion plate 8 always face the inner wall of the component 3 to be welded, that is, this structure can simultaneously limit the direction of the extrusion plate 8.

[0025] It should be pointed out that when the multiple extrusion plates 8 on the rotating drum 7 move synchronously, they can perform axis fixing processing on the component to be welded 3, thereby completing the positioning work of the component to be welded 3, and for the convenience of clamping, the extrusion plate 8 mainly extrude the cylindrical inner wall position at the end of the component to be welded 3.

[0026] When the welding core 4 melts, the second clamping group will be separated from the welding core 4 to avoid damage to the second clamping group caused by high temperature, and the components in the clamping structure can be used with a non-magnetic structure to avoid heating by the alternating magnetic field.

[0027] Furthermore, a right-angle pressing plate 11 is slidably inserted into each extrusion plate 8 in the first clamping group on the upper side, and the right-angle pressing plate 11 is used to press down the top of the upper part 3 to be welded among the two parts 3 to be welded.

[0028] In detail, the multiple extrusion plates 8 in the first clamping group are mainly used to support the component 3 to be welded in all directions. During welding, in order to make the two components 3 to be welded and the welding core 4 contact more closely, the upper component 3 to be welded needs to be moved downward by a specified distance. In this way, the excess part between the two components 3 to be welded can be squeezed outward or inward, thereby increasing the welding area, improving the connection strength, avoiding the occurrence of hollowness, bubbles, etc., and facilitating subsequent grinding processing.

[0029] Further, the second clamping group includes a plurality of fixed sleeves 12 fixed on the outer wall of the core barrel 6, the fixed sleeves 12 are along the radial direction of the core barrel 6, a movable sleeve 13 is slidably arranged in the fixed sleeve 12, a pressing column 14 is slidably arranged in the movable sleeve 13, and the movable sleeve 13 is connected to the pressing column 14 through a first spring 15, the end of the movable sleeve 13 extends out of the fixed sleeve 12, the end of the pressing column 14 extends out of the movable sleeve 13, and the end of the pressing column 14 is used to extrude and fix the welding core 4; The movable sleeve 13 is rotatably provided with a second push-pull arm 16, which passes through the corresponding notch of the middle rotating drum 7 and is rotatably connected to the middle rotating drum 7; When the second push-pull arm 16 is parallel to the movable sleeve 13 , the movable sleeve 13 moves outward on the fixed sleeve 12 to a maximum distance.

[0030] In detail, the rotating drum 7 corresponding to the second clamping group is the middle rotating drum 7 among the three rotating drums 7. When the rotating drum 7 rotates, it can push the movable sleeve 13 to slide on the fixed sleeve 12 through the second push-pull arm 16, thereby using the first spring 15 to push the extrusion column 14 to move, and the extrusion column 14 extrudes the welding core 4, and multiple extrusion columns 14 perform external support and fixed axis processing on the welding core 4.

[0031] In actual use, as the middle rotating drum 7 rotates, the angle between the second push-pull arm 16 and the movable sleeve 13 gradually decreases. At this time, the squeezing column 14 approaches the welding core 4 and squeezes the welding core 4. The squeezing column 14 cannot move. The second push-pull arm 16 continues to move and pushes the movable sleeve 13 and the squeezing column 14 to slide relative to each other. The first spring 15 is elastically deformed. When the second push-pull arm 16 is parallel to the movable sleeve 13 and continues to move, the second push-pull arm 16 pulls the movable sleeve 13 and the squeezing column 14 to gradually reset, that is, the squeezing column 14 gradually moves away from The welding core 4 is melted and welded at this time, and the rotation of the middle rotating drum 7 is used to realize the positioning, clamping and disengagement of the welding core 4. The setting of the movable sleeve 13, the squeezing column 14 and the first spring 15 can ensure that the welding core 4 can be effectively squeezed while providing a buffer space, so that the squeezing column 14 can clamp the welding core 4 for a specified time, and allow the second push-pull arm 16 to move again after passing a position parallel to the movable sleeve 13, thereby improving the effectiveness and practicality of the structure and avoiding the occurrence of instantaneous contact.

[0032] Furthermore, a core column 17 is coaxially arranged in the core barrel 6 , and the core column 17 is rotatably mounted on the frame 1 . A plurality of second springs 18 are fixed on the inner wall of each rotating barrel 7 , and the second springs 18 are fixedly connected to the core column 17 .

[0033] In detail, the core column 17 can pull the three rotating drums 7 to rotate through the second spring 18, thereby providing power for the first clamping group and the second clamping group, and the setting of the second spring 18 can distinguish and limit the end positions of the rotation of the three rotating drums 7, that is, when one group of the first clamping groups completes the clamping, if the other group of the first clamping groups has not completed the clamping, the second clamping group can continue to move until the clamping is completed, and the first clamping group that has completed the clamping can achieve the buffering work between the corresponding rotating drum 7 and the core column 17 through the second spring 18, and the second clamping group also applies to this effect.

[0034] Furthermore, a first threaded rod 19 is inserted into the top of the core column 17, and the first threaded rod 19 is threadedly connected to the core column 17. A plurality of connecting plates 20 are arranged on the outer wall of the first threaded rod 19, and a telescopic rod 21 is rotatably arranged on each connecting plate 20, and the movable end of the telescopic rod 21 is fixed on the right-angle pressure plate 11.

[0035] In detail, for the upper part to be welded 3, clamping and pressing work needs to be performed. When the extrusion plate 8 in the upper first clamping group has not yet contacted the upper part to be welded 3, the extrusion plate 8 is in a moving state. At this time, the core column 17 and the first threaded rod 19 thereon move synchronously. When the extrusion plate 8 contacts the part to be welded 3 and is in a stationary state, the extrusion plate 8 stops moving, and the first threaded rod 19 is restricted by the telescopic rod 21 and the connecting plate 20 and stops moving. At this time, the core column 17 and the first threaded rod 19 rotate relative to each other. Since the core column 17 is threadedly connected to the first threaded rod 19, the first threaded rod 19 will move downward on the core column 17. The first threaded rod 19 pushes the right-angle pressure plate 11 downward through the connecting plate 20 and the telescopic rod 21 and contacts the top of the upper part to be welded 3. The right-angle pressure plate 11 squeezes the upper part to be welded 3 downward, and the upper part to be welded 3 and the corresponding extrusion plate 8 slide relative to each other. The telescopic rod 21 is mainly used to connect the right-angle pressure plate 11 and the connecting plate 20.

[0036] Furthermore, a round cover 22 is buckled on the bottom of the frame 1, and the bottom of the core column 17 is inserted into the round cover 22. Two partitions 23 are arranged on the outer wall of the core column 17 inside the round cover 22. The two partitions 23 divide the internal space of the round cover 22. One of the partitions 23 is fixed on the inner wall of the round cover 22, and two oil pipes 24 are arranged on both sides of the partition 23. The other partition 23 is fixedly connected to the core column 17.

[0037] In detail, two partitions 23 divide the internal space of the circular cover 22 into two spaces, and two oil pipes 24 are respectively connected to the two spaces. When one oil pipe 24 supplies hydraulic oil into the corresponding space, the hydraulic oil pushes the partition 23 connected to the core column 17 to move, so that the core column 17 rotates forward, and the other space is reduced, and the hydraulic oil therein flows out through another oil pipe 24. When it is necessary to rotate the core column 17 in the opposite direction, the oil supply and discharge relationship of the two oil pipes 24 can be exchanged.

[0038] Furthermore, the pushing structure includes a moving seat 25 vertically slidably mounted on the frame 1 and a motor 26 fixed on the frame 1, a second threaded rod 27 is provided at the output end of the motor 26, the second threaded rod 27 passes through the moving seat 25 and is threadedly connected to each other, and the electromagnetic coil 2 is fixed on the moving seat 25.

[0039] In detail, the motor 26 can push the moving seat 25 to move up and down through the second threaded rod 27, thereby driving the electromagnetic coil 2 to move in the vertical direction.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A valve body welding forming device, characterized in that: It includes a frame, an electromagnetic coil and a welding core, wherein the frame mainly plays a supporting role, a pushing structure is arranged on the frame, the pushing structure is used to push the electromagnetic coil to move up and down, and the electromagnetic coil is used to heat the butt joint position of two parts to be welded, the two parts to be welded are vertically butt jointed and placed on the frame, the welding core is located between the two parts to be welded, the cross-section shape of the welding core is square, and a filling groove is opened on each side of the square, and the filling groove is filled with flux; When the electromagnetic coil heats the component to be welded, the welding core and the flux, the flux ignites the welding core and the position to be welded on the component to be welded.

2. A valve body welding forming device according to claim 1, characterized in that: The frame is provided with a clamping structure for fixing two parts to be welded; The clamping structure includes a core barrel fixed on the frame, the part to be welded is sleeved on the outside of the core barrel, three rotating barrels are rotatably arranged on the inner wall of the core barrel, the three rotating barrels are coaxially arranged vertically, and a notch is opened on the outer wall of the core barrel corresponding to each rotating barrel, wherein the upper and lower rotating barrels are each provided with a first clamping group, the first clamping group is used to fix the part to be welded, and the middle rotating barrel is provided with a second clamping group, the second clamping group is used to fix the welding core; The first clamping group includes multiple extrusion plates and two gears rotatably arranged on one surface of each extrusion plate, the two gears are meshed with each other, and the other surface of the extrusion plate is used to extrude the parts to be welded. A first push-pull arm is fixed on each gear, one first push-pull arm is rotatably mounted on the outer wall of the core barrel, and the other first push-pull arm passes through the slot and is rotatably mounted on the rotating barrel.

3. A valve body welding forming device according to claim 2, characterized in that: A right-angle pressing plate is slidably inserted into each extrusion plate in the first clamping group on the upper side, and the right-angle pressing plate is used to press down the top of the upper part to be welded among the two parts to be welded.

4. A valve body welding forming device according to claim 3, characterized in that: The second clamping group includes a plurality of fixed sleeves fixed on the outer wall of the core barrel, the fixed sleeves are arranged along the radial direction of the core barrel, a movable sleeve is slidably arranged in the fixed sleeves, a pressing column is slidably arranged in the movable sleeves, and the movable sleeves are connected to the pressing column by a first spring, the end of the movable sleeves extends out of the fixed sleeves, the end of the pressing column extends out of the movable sleeves, and the end of the pressing column is used to extrude and fix the welding core; A second push-pull arm is rotatably provided on the movable sleeve, and the second push-pull arm passes through the notch corresponding to the middle rotating drum and is rotatably connected to the middle rotating drum; When the second push-pull arm is parallel to the movable sleeve, the movable sleeve moves outward on the fixed sleeve to a maximum distance.

5. A valve body welding forming device according to claim 4, characterized in that: A core column is coaxially arranged in the core cylinder, and the core column is rotatably mounted on the frame. A plurality of second springs are fixed on the inner wall of each rotating cylinder, and the second springs are fixedly connected to the core column.

6. A valve body welding forming device according to claim 5, characterized in that: A first threaded rod is inserted into the top of the core column, the first threaded rod is threadedly connected to the core column, a plurality of connecting plates are arranged on the outer wall of the first threaded rod, a telescopic rod is rotatably arranged on each connecting plate, and the movable end of the telescopic rod is fixed on the right-angle pressure plate.

7. A valve body welding forming device according to claim 6, characterized in that: A round cover is buckled on the bottom of the frame, the bottom of the core column is inserted into the round cover, and two partitions are arranged on the outer wall of the core column inside the round cover. The two partitions divide the internal space of the round cover, one of the partitions is fixed on the inner wall of the round cover, and two oil pipes are arranged on both sides of the partition, and the other partition is fixedly connected to the core column.

8. A valve body welding forming device according to claim 7, characterized in that: The pushing structure comprises a moving seat vertically slidably mounted on the frame and a motor fixed on the frame, a second threaded rod is arranged at the output end of the motor, the second threaded rod passes through the moving seat and is threadedly connected to each other, and the electromagnetic coil is fixed on the moving seat.

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