High-frequency plasma arc welding machine based on pipe fitting machining

Abstract

The invention discloses a high-frequency plasma arc welding machine based on pipe fitting machining, relates to the technical field of ion arc welding, and aims at solving the technical problems that in the existing pipe fitting edge rolling forming process, pipe fittings are prone to being low in forming precision, ports cannot be aligned, welding gaps are not uniform, and the follow-up welding quality is difficult to guarantee. Two supporting seats are fixedly connected to the top end of the base, round pieces are fixedly connected to the top ends of the supporting seats, top rail frames are fixedly connected to the top ends of the round pieces, sliding groove rails are formed in the top rail frames, and sliding rail seats are slidably connected to the interiors of the sliding groove rails. The high-frequency plasma arc welding machine based on pipe fitting machining has the technical effects that the multiple sets of arc-shaped attaching plates are driven to surround the outer side of a pipe fitting in the circumferential direction, the contour of the pipe fitting after edge rolling can be restrained, the pipe fitting is kept in a standard circle all the time, it is ensured that ports are aligned and gaps are uniform in the subsequent welding process, and a foundation is laid for high-quality welding.

Description

Technical Field

[0001] This invention relates to the field of plasma arc welding technology, and in particular to a high-frequency plasma arc welding machine based on pipe fitting processing. Background Technology

[0002] High-frequency plasma arc welding machines belong to the category of metal cutting and welding equipment manufacturing, such as plasma arc welding machines. They are high-efficiency and precision welding equipment for pipe processing. The core technology is to form a high-energy-density plasma arc through high-frequency arc ignition and arc compression, so as to achieve stable fusion of longitudinal and circumferential seams. They are suitable for processing in multiple scenarios, from ultra-thin-walled pipes to medium-thick-walled pipes.

[0003] In the existing pipe rolling process, the local clamping structure is unable to fully constrain the outer wall of the pipe. Due to the low forming accuracy of the pipe and the irregular shape of the cylinder, the two ends of the pipe are difficult to align precisely, the width of the butt joint gap is inconsistent, and the position deviation of the weld is large. This results in poor weld formation, insufficient welding strength, and poor overall roundness consistency during the welding process. Summary of the Invention

[0004] This invention discloses a high-frequency plasma arc welding machine based on pipe processing, which aims to solve the technical problems of irregular contours such as insufficient roundness, elliptical deformation, local collapse, and edge distortion in the existing pipe rolling process, resulting in low pipe forming accuracy, misalignment of ends, uneven welding gaps, and difficulty in ensuring subsequent welding quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-frequency plasma arc welding machine for pipe fitting processing includes a base. Two support seats are fixedly connected to the top of the base. A circular component is fixedly connected to the top of each support seat. A top track frame is fixedly connected to the top of each circular component. A sliding track is provided on the top track frame. A sliding track seat is slidably connected inside the sliding track. A welding head is provided below the sliding track seat. Pipe bending auxiliary components are fixedly connected to the opposite sides of the two circular components. The pipe bending auxiliary components include multiple arc-shaped bonding plates. Arc-shaped components are fixedly connected to the opposite ends of the arc-shaped bonding plates. A support frame is provided on the outer side of each arc-shaped component.

[0006] In a preferred embodiment, a servo motor is provided on the side of the circular part away from the welding head. The power output of the servo motor is connected to a rotating gear through a coupling. A gear slide plate is provided on the outer side of the rotating gear, and the gear slide plate and the rotating gear mesh with each other through tooth grooves.

[0007] In a preferred embodiment, an extension plate is fixedly connected to the side of the gear slide plate closest to the servo motor. Multiple telescopic rods are fixedly connected to the inner side of the extension plate, and multiple telescopic springs are fixedly connected to the inner side of the extension plate. The telescopic springs are all located outside the telescopic rods, and the ends of the telescopic rods and telescopic springs away from the extension plate are all fixedly connected to movable parts.

[0008] In a preferred embodiment, a movable rod is fixedly connected to the inner side of each of the movable parts, and multiple arc-shaped grooves are provided on the gear slide part. The movable rods are movably connected to the inside of the arc-shaped grooves. The side of the movable part away from the telescopic rod is fixedly connected to the side of the support frame away from the arc-shaped part. A fixed rod is fixedly connected to the inside of the support frame, and the outer side of the fixed rod is movably connected to the inner side of the arc-shaped part.

[0009] In a preferred embodiment, the top of the base is provided with an auxiliary support assembly, which includes a support rod. The top of the support rod is fixedly connected to a connecting frame, the top of the connecting frame is fixedly connected to a fixing frame, and the top of the fixing frame is fixedly connected to a central placement plate.

[0010] In a preferred embodiment, a motor frame is fixedly connected to the top of the connecting frame. The motor frame is located inside the fixed frame, and a bidirectional motor is fixedly connected inside the motor frame. The power output shafts at both ends of the bidirectional motor are connected to threaded rods via couplings, and the ends of the threaded rods away from the bidirectional motors are movably connected to the inner side of the connecting frame.

[0011] In a preferred embodiment, a sliding seat is movably connected to the outer side of each of the two threaded rods, two sliding groove plates are fixedly connected to the top of the connecting frame, the bottom of each sliding seat is slidably connected to the top of the sliding groove plate, a pressing spring is fixedly connected to the top of each sliding seat, and an extended arc-shaped pad is fixedly connected to the top of each pressing spring.

[0012] In a preferred embodiment, a lower frame is fixedly connected to the opposite sides of the two support seats. Two drive motors are fixedly connected to the outer side of each lower frame. The power output shaft of each drive motor is connected to a rotating rod via a coupling, and the end of the rotating rod away from the drive motor is movably connected to the side of the lower frame away from the support seat.

[0013] In a preferred embodiment, an arc-shaped clamping member is fixedly connected to the outer side of each of the plurality of rotating rods, an annular pad is fixedly connected to the inner side of each of the circular frames, and an extension member is fixedly connected to the side of the annular pad away from the arc-shaped clamping member.

[0014] In a preferred embodiment, the bottom end of the sliding track seat is fixedly connected to a telescopic device, and the bottom end of the telescopic device is fixedly connected to the top end of the welding head.

[0015] As can be seen from the above, the high-frequency plasma arc welding machine based on pipe processing provided by the present invention has the ability to drive multiple sets of arc-shaped bonding plates to circumferentially surround the outside of the pipe, forming a uniform and continuous annular clamping and shaping structure. This structure can constrain the contour of the pipe after it is rolled, ensuring that the pipe always maintains a standard circle, avoiding deformation problems such as ellipticity, local collapse, and edge distortion. This significantly improves the forming accuracy of the pipe, ensures that the ends are aligned and the gaps are uniform during subsequent welding, and lays the foundation for high-quality welding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0017] Figure 2 This is a schematic diagram of the top structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0018] Figure 3 This is a schematic diagram of the support structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0019] Figure 4 This is a schematic diagram of the circular component structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the pipe bending auxiliary component structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0021] Figure 6 This is a schematic diagram of a pipe bending auxiliary component of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0022] Figure 7 This is a schematic diagram of the auxiliary support component structure of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0023] Figure 8 This is a schematic diagram of the auxiliary support component of a high-frequency plasma arc welding machine based on pipe fitting processing proposed in this invention.

[0024] In the diagram: 1. Base; 2. Support; 3. Circular component; 4. Extension component; 5. Top track frame; 6. Sliding track seat; 7. Telescopic device; 8. Welded head; 9. Lower frame; 10. Rotating rod; 11. Drive motor; 12. Pipe bending auxiliary component; 1201. Servo motor; 1202. Rotary gear; 1203. Gear slide rail component; 1204. Extension plate; 1205. Telescopic rod; 1206. Telescopic spring; 1207. Movable component; 1208. Moving rod; 12 09. Support frame; 1210. Fixing rod; 1211. Arc-shaped component; 1212. Arc-shaped bonding plate; 13. Arc-shaped clamping component; 14. Annular pad; 15. Auxiliary support assembly; 1501. Support rod; 1502. Connecting frame; 1503. Fixing frame; 1504. Center placement plate; 1505. Slide plate; 1506. Motor frame; 1507. Bidirectional motor; 1508. Threaded rod; 1509. Pressing spring; 1510. Sliding seat; 1511. Extended arc-shaped pad. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] The high-frequency plasma arc welding machine for pipe processing disclosed in this invention is mainly applied to scenarios where, during the existing pipe rolling process, pipes are prone to irregular contours such as insufficient roundness, elliptical deformation, local collapse, and edge distortion, resulting in low pipe forming accuracy, misalignment of ends, uneven welding gaps, and difficulty in ensuring subsequent welding quality.

[0027] Reference Figures 1-8 A high-frequency plasma arc welding machine based on pipe fitting processing includes a base 1. Two support seats 2 are fixedly connected to the top of the base 1. A circular part 3 is fixedly connected to the top of each support seat 2. A top track frame 5 is fixedly connected to the top of the circular part 3. A sliding track is provided on the top track frame 5. A sliding track seat 6 is slidably connected inside the sliding track. A welding head 8 is provided below the sliding track seat 6. A pipe bending auxiliary component 12 is fixedly connected to the opposite side of the two circular parts 3. The pipe bending auxiliary component 12 includes multiple arc-shaped bonding plates 1212. An arc-shaped part 1211 is fixedly connected to the opposite end of each arc-shaped bonding plate 1212. A support frame 1209 is provided on the outer side of each arc-shaped part 1211.

[0028] Reference Figures 1-6In a preferred embodiment, a servo motor 1201 is provided on the side of the circular part 3 away from the welding head 8. The power output of the servo motor 1201 is connected to a rotating gear 1202 through a coupling. A gear slide plate 1505 is provided on the outer side of the rotating gear 1202. The gear slide plate 1505 and the rotating gear 1202 are meshed through tooth grooves.

[0029] In this invention, an extension plate 1204 is fixedly connected to the side of the gear slide plate 1505 near the servo motor 1201. Multiple telescopic rods 1205 are fixedly connected to the inner side of the extension plate 1204. Multiple telescopic springs 1206 are fixedly connected to the inner side of the extension plate 1204. The telescopic springs 1206 are all located outside the telescopic rods 1205. The ends of the telescopic rods 1205 and the telescopic springs 1206 away from the extension plate 1204 are all fixedly connected to movable parts 1207.

[0030] In this invention, multiple movable parts 1207 are fixedly connected to the inner side of each movable rod 1208. Multiple arc-shaped grooves are provided on the gear slide 1203. The movable rods 1208 are movably connected to the inside of the arc-shaped grooves. The side of the movable part 1207 away from the telescopic rod 1205 is fixedly connected to the side of the support frame 1209 away from the arc-shaped part 1211. The inside of the support frame 1209 is fixedly connected to a fixing rod 1210, and the outer side of the fixing rod 1210 is movably connected to the inner side of the arc-shaped part 1211.

[0031] Specifically, after the pipe fitting plate is initially rolled and clamped by the arc-shaped clamping member 13, the servo motor 1201 on the outer side of the circular member 3 is first started. The power output shaft of the servo motor 1201 drives the rotating gear 1202 to rotate through the coupling. The outer side of the rotating gear 1202 meshes with the gear slide plate 1505 through the tooth groove. Therefore, when the rotating gear 1202 rotates, it drives the gear slide plate 1505 to rotate synchronously through the meshing of the tooth groove. During the rotation of the gear slide plate 1505, the arc-shaped slide will guide and limit the moving rod 1208. The moving rod 1208 slides inside the arc-shaped slide, and at the same time pushes the movable member 1207 to move closer to the pipe fitting cylinder. During the movement, the movable member 1207 will drive the telescopic rod 1205 and the telescopic spring 1206 to extend forward synchronously. 6 acts as a buffer and reset mechanism on the outside of the telescopic rod 1205. The movement of the movable part 1207 will further drive the support frame 1209 to move synchronously towards the cylindrical tube. The fixed rod 1210, which is fixedly connected inside the support frame 1209, will move on the inside of the arc-shaped part 1211, providing stable support and guidance for the movement of the arc-shaped part 1211. Under the drive of the support frame 1209, the arc-shaped part 1211 will gradually move closer to the outer wall of the cylindrical tube, eventually causing the arc-shaped bonding plate 1212 to be tightly bonded to the outer wall surface of the cylindrical tube. The arc-shaped bonding plate 1212 adopts an arc-shaped structure that is adapted to the cylindrical tube, and can adaptively adjust the bonding position according to the actual arc-shaped contour of the cylindrical tube. Multiple sets of arc-shaped bonding plates 1212 are distributed around the outer circumference of the cylindrical tube to form a ring-shaped clamping and shaping structure, which provides all-round auxiliary fixation for the cylindrical tube.

[0032] It should be noted that the multiple sets of arc-shaped bonding plates 1212 circumferentially wrap around the outside of the pipe fitting, forming a uniform and continuous annular clamping and shaping structure. This can constrain the outline of the pipe fitting after it is rolled, ensuring that the pipe fitting always maintains a standard circle, avoiding deformation problems such as ellipses, local collapses, and edge distortion. This significantly improves the forming accuracy of the pipe fitting, ensuring that the ends are aligned and the gaps are uniform during subsequent welding, laying the foundation for high-quality welding.

[0033] In practical applications, the fitting force can be automatically adjusted according to the actual contour of the pipe fitting, ensuring sufficient clamping force while avoiding rigid compression damage to the pipe fitting; multiple sets of arc-shaped fitting plates work simultaneously to fix the pipe fitting from all directions, effectively offsetting the stress and external force interference during rolling and welding, so that the pipe fitting remains stable throughout the entire processing flow, without shaking or shifting.

[0034] Reference Figure 1 , Figure 7 and Figure 8In a preferred embodiment, an auxiliary support assembly 15 is provided at the top of the base 1. The auxiliary support assembly 15 includes a support rod 1501. A connecting frame 1502 is fixedly connected to the top of the support rod 1501. A fixing frame 1503 is fixedly connected to the top of the connecting frame 1502. A central placement plate 1504 is fixedly connected to the top of the fixing frame 1503.

[0035] In this invention, a motor frame 1506 is fixedly connected to the top of the connecting frame 1502. The motor frame 1506 is located inside the fixed frame 1503. A bidirectional motor 1507 is fixedly connected inside the motor frame 1506. The power output shafts at both ends of the bidirectional motor 1507 are connected to threaded rods 1508 through couplings. The ends of the threaded rods 1508 away from the bidirectional motor 1507 are movably connected to the inner side of the connecting frame 1502.

[0036] In this invention, sliding seats 1510 are movably connected to the outer sides of the two threaded rods 1508. Two sliding groove plates 1505 are fixedly connected to the top of the connecting frame 1502. The bottom ends of the sliding seats 1510 are slidably connected to the top ends of the sliding groove plates 1505. Pressing springs 1509 are fixedly connected to the top ends of the sliding seats 1510, and extending arc-shaped pads 1511 are fixedly connected to the top ends of the pressing springs 1509.

[0037] Specifically, the center of the pipe cylinder is placed on the center placement plate 1504 of the auxiliary support assembly 15, which can form a basic support for the center of the pipe cylinder. The bidirectional motor 1507 inside the auxiliary support assembly 15 is started. The bidirectional motor 1507 is located inside the motor frame 1506. The power output shafts at both ends drive the threaded rod 1508 to rotate synchronously through the coupling. The bottom end of the sliding seat 1510 is slidably connected to the sliding groove plate 1505 at the top of the connecting frame 1502. The sliding groove plate 1505 is for the movement of the sliding seat 1510. The bidirectional motor 1507 provides a stable guide rail. When the bidirectional motor 1507 rotates forward, the threaded rods 1508 at both ends drive the sliding seat 1510 to move along the slide plate 1505 away from the center placement plate 1504. During the movement, the sliding seat 1510 drives the top pressing spring 1509 and the extended arc-shaped pad 1511 to move synchronously. When the bidirectional motor 1507 rotates in reverse, the sliding seat 1510 moves towards the center placement plate 1504, and the top of the extended arc-shaped pad 1511 fits against the bottom outer wall of the tubular cylinder. The pressing spring 1509 is located between the sliding seat 1510 and the extended arc-shaped pad 1511. It can automatically compress or rebound according to the curvature of the bottom of the pipe cylinder, so that the extended arc-shaped pad 1511 fits tightly against the bottom outer wall of the pipe cylinder. The extended arc-shaped pad 1511 forms a bottom support structure, providing stable support for the bottom of the pipe cylinder. During the welding operation, when the welding head 8 moves along the axial direction of the pipe cylinder to a certain welding position, the bidirectional motor 1507 of the auxiliary support assembly 15 starts synchronously. According to the position signal of the welding head 8, the motor 1507 moves the welding head 8 to the welding position. The rotating threaded rod 1508 drives the sliding seat 1510 to move along the slide plate 1505 directly below the current welding position. The sliding seat 1510 drives the extended arc pad 1511 to move synchronously until the extended arc pad 1511 is precisely attached to the bottom outer wall of the pipe cylinder at the current welding position of the welding head 8. The pressing spring 1509 plays an elastic buffering role between the extended arc pad 1511 and the pipe cylinder, so that the extended arc pad 1511 is always in close contact with the bottom of the pipe cylinder, forming a stable support force for the welding part.

[0038] It should be noted that the extended arc pad 1511 can move synchronously according to the real-time position of the welding head 8, so that the extended arc pad 1511 is always directly below the welding point, providing fixed-point support, ensuring the stability of the pipe fitting's shape throughout the welding process, and significantly improving the weld formation quality.

[0039] In practical applications, the central placement plate 1504 and the two extended arc-shaped pads 1511 together form a multi-point support structure, which evenly distributes the weight of the pipe fitting itself, the welding impact force, and the vibration during the processing, avoiding deformation or shaking of the pipe fitting caused by excessive force at a single point.

[0040] Reference Figures 1-4In a preferred embodiment, a lower frame 9 is fixedly connected to the opposite sides of the two support seats 2. Two drive motors 11 are fixedly connected to the outer side of the lower frame 9. The power output shafts of the drive motors 11 are connected to rotating rods 10 through couplings. The ends of the rotating rods 10 away from the drive motors 11 are movably connected to the side of the lower frame 9 away from the support seats 2. Arc-shaped clamping parts 13 are fixedly connected to the outer side of the multiple rotating rods 10. Annular pads 14 are fixedly connected to the inner side of the circular frame. Extension parts 4 are fixedly connected to the side of the annular pads 14 away from the arc-shaped clamping parts 13. A telescopic device 7 is fixedly connected to the bottom end of the sliding track seat 6. The bottom end of the telescopic device 7 is fixedly connected to the top end of the welding head 8.

[0041] Working principle: Before starting the welding operation, the flat plate of pipe to be processed is placed stably on the arc-shaped clamp 13. The drive motor 11 on the outside of the lower frame 9 is started. The drive motor 11 drives the rotating rod 10 to rotate synchronously. During the rotation of the rotating rod 10, it will drive the arc-shaped clamp 13 fixedly connected on the outside to rotate. Since the two arc-shaped clamps 13 are located on both sides of the pipe plate, as the drive motor 11 continues to run, the arc-shaped clamps 13 on both sides will gradually move closer to each other. During the movement, the arc-shaped inner wall of the arc-shaped clamp 13 will apply continuous extrusion force to the pipe plate, gradually bending and curling the flat plate along the arc trajectory. After the plate is bent, it moves forward, so that the two sets of arc-shaped clamps 13 clamp the two ends of the pipe cylinder respectively. The annular pad 14 on the inside of the circular frame will contact the edge of the pipe plate, further assisting the plate to maintain the curled shape and maintain the regular cylindrical pipe shape. After the pipe fitting plate is initially rolled and clamped by the arc-shaped clamping member 13, the servo motor 1201 on the outer side of the circular member 3 is first started. The power output shaft of the servo motor 1201 drives the rotating gear 1202 to rotate through the coupling. The outer side of the rotating gear 1202 meshes with the gear slide plate 1505 through the tooth groove. Therefore, when the rotating gear 1202 rotates, it drives the gear slide plate 1505 to rotate synchronously through the meshing of the tooth groove. During the rotation of the gear slide plate 1505, the arc-shaped slide will guide and limit the moving rod 1208. The moving rod 1208 slides inside the arc-shaped slide, and at the same time pushes the movable member 1207 to move closer to the pipe fitting cylinder. During the movement, the movable member 1207 will drive the telescopic rod 1205 and the telescopic spring 1206 to extend forward synchronously. The outer side of the telescopic rod 1205 serves as a buffer and reset mechanism. The movement of the movable part 1207 will further drive the support frame 1209 to move synchronously towards the cylindrical tube. The fixed rod 1210, which is fixedly connected inside the support frame 1209, will move on the inner side of the arc-shaped part 1211, providing stable support and guidance for the movement of the arc-shaped part 1211. Under the drive of the support frame 1209, the arc-shaped part 1211 will gradually move closer to the outer wall of the cylindrical tube, eventually causing the arc-shaped bonding plate 1212 to be tightly bonded to the outer wall surface of the cylindrical tube. The arc-shaped bonding plate 1212 adopts an arc-shaped structure that is compatible with the cylindrical tube and can adaptively adjust the bonding position according to the actual arc-shaped contour of the cylindrical tube. Multiple sets of arc-shaped bonding plates 1212 are distributed around the outer circumference of the cylindrical tube to form a ring-shaped clamping and shaping structure, which provides all-round auxiliary fixation for the cylindrical tube. The center of the pipe cylinder is placed on the center plate 1504 of the auxiliary support assembly 15, which provides basic support for the center of the pipe cylinder. The bidirectional motor 1507 inside the auxiliary support assembly 15, located inside the motor frame 1506, is activated. The power output shafts at both ends drive the threaded rods 1508 to rotate synchronously via couplings. The bottom end of the sliding seat 1510 is slidably connected to the slide plate 1505 at the top of the connecting frame 1502. The slide plate 1505 provides a stable guide track for the movement of the sliding seat 1510. When the bidirectional motor 1507 rotates forward, the threaded rods 1508 at both ends drive the sliding seat 1510 along the slide plate 1505 away from the center. When the placement plate 1504 moves in the direction of movement, the sliding seat 1510 will drive the top pressing spring 1509 and the extended arc-shaped pad 1511 to move synchronously during the movement. When the bidirectional motor 1507 reverses, the sliding seat 1510 moves towards the center placement plate 1504, and the top of the extended arc-shaped pad 1511 fits against the bottom outer wall of the tube cylinder. The pressing spring 1509 is located between the sliding seat 1510 and the extended arc-shaped pad 1511, and can automatically compress or rebound according to the curvature of the bottom of the tube cylinder, so that the extended arc-shaped pad 1511 fits tightly against the bottom outer wall of the tube cylinder. The extended arc-shaped pad 1511 forms a bottom support structure to provide stable support for the bottom of the tube cylinder. The telescopic device 7 at the bottom of the sliding track seat 6 is activated. The telescopic device 7 extends downward, driving the welding head 8 at the bottom to move down synchronously until the plasma arc emitting end of the welding head 8 moves to the same height as the joint gap of the pipe cylinder, thus completing the vertical alignment of the welding head 8. The telescopic device 7 can precisely adjust the vertical displacement of the welding head 8 to ensure that the plasma arc can act on the joint gap. When the welding operation starts, the power system of the high-frequency plasma arc welding machine outputs a high-frequency pulse current, which directly acts on the joint gap of the pipe cylinder. As the sliding track seat 6 continues to move, the welding head 8 moves at a constant speed along the joint gap, forming a continuous weld seam, thus completing the fixed welding of the joint of the pipe cylinder. During the welding operation, when the welding head 8 moves along the axial direction of the pipe cylinder to a certain welding position, the bidirectional motor 1507 of the auxiliary support assembly 15 starts synchronously. According to the position signal of the welding head 8, it drives the threaded rod 1508 to rotate, which in turn drives the sliding seat 1510 to move along the slide plate 1505 directly below the current welding position. The sliding seat 1510 drives the extended arc pad 1511 to move synchronously until the extended arc pad 1511 is precisely attached to the bottom outer wall of the pipe cylinder at the current welding position of the welding head 8. The pressing spring 1509 plays an elastic buffering role between the extended arc pad 1511 and the pipe cylinder, so that the extended arc pad 1511 is always in close contact with the bottom of the pipe cylinder, forming a stable support force for the welding part.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-frequency plasma arc welding machine based on pipe fitting processing, comprising a base (1), characterized in that, The top of the base (1) is fixedly connected to two support seats (2), and the top of each support seat (2) is fixedly connected to a circular piece (3), and the top of the circular piece (3) is fixedly connected to a top track frame (5). The top track frame (5) is provided with a sliding track, and a sliding track seat (6) is slidably connected inside the sliding track. A welding head (8) is provided below the sliding track seat (6). The pipe bending auxiliary component (12) is fixedly connected to the opposite side of the two circular pieces (3). The pipe bending auxiliary component (12) includes multiple arc-shaped bonding plates (1212). The opposite end of the arc-shaped bonding plates (1212) is fixedly connected to an arc-shaped piece (1211), and a support frame (1209) is provided on the outer side of the arc-shaped piece (1211).

2. The high-frequency plasma arc welding machine based on pipe fitting processing according to claim 1, characterized in that, A servo motor (1201) is provided on the side of the circular part (3) away from the welding head (8). The power output of the servo motor (1201) is connected to a rotating gear (1202) through a coupling. A gear slide plate (1505) is provided on the outside of the rotating gear (1202). The gear slide plate (1505) and the rotating gear (1202) mesh with each other through tooth grooves.

3. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 2, characterized in that, An extension plate (1204) is fixedly connected to the side of the gear slide plate (1505) near the servo motor (1201). Multiple telescopic rods (1205) are fixedly connected to the inner side of the extension plate (1204). Multiple telescopic springs (1206) are fixedly connected to the inner side of the extension plate (1204). The telescopic springs (1206) are all located outside the telescopic rods (1205), and the ends of the telescopic rods (1205) and the telescopic springs (1206) away from the extension plate (1204) are fixedly connected to movable parts (1207).

4. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 3, characterized in that, The inner sides of the multiple movable parts (1207) are fixedly connected to moving rods (1208). The gear slide part (1203) has multiple arc-shaped slide grooves. The moving rods (1208) are movably connected to the inside of the arc-shaped slide grooves. The side of the movable part (1207) away from the telescopic rod (1205) is fixedly connected to the side of the support frame (1209) away from the arc-shaped part (1211). The inside of the support frame (1209) is fixedly connected to a fixed rod (1210), and the outer sides of the fixed rods (1210) are movably connected to the inside of the arc-shaped part (1211).

5. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 1, characterized in that, The base (1) is provided with an auxiliary support assembly (15) at its top. The auxiliary support assembly (15) includes a support rod (1501), a connecting frame (1502) is fixedly connected to the top of the support rod (1501), a fixing frame (1503) is fixedly connected to the top of the connecting frame (1502), and a center placement plate (1504) is fixedly connected to the top of the fixing frame (1503).

6. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 5, characterized in that, The top of the connecting frame (1502) is fixedly connected to a motor frame (1506). The motor frame (1506) is located inside the fixed frame (1503). A bidirectional motor (1507) is fixedly connected inside the motor frame (1506). The power output shafts at both ends of the bidirectional motor (1507) are connected to threaded rods (1508) through couplings. The end of the threaded rod (1508) away from the bidirectional motor (1507) is movably connected to the inside of the connecting frame (1502).

7. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 6, characterized in that, The outer sides of the two threaded rods (1508) are movably connected to sliding seats (1510). The top of the connecting frame (1502) is fixedly connected to two sliding groove plates (1505). The bottom of the sliding seats (1510) is slidably connected to the top of the sliding groove plates (1505). The top of the sliding seats (1510) is fixedly connected to a pressing spring (1509), and the top of the pressing springs (1509) is fixedly connected to an extended arc-shaped pad (1511).

8. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 1, characterized in that, Each of the two support seats (2) is fixedly connected to a lower frame (9) on the opposite side. Two drive motors (11) are fixedly connected to the outer side of the lower frame (9). The power output shaft of each drive motor (11) is connected to a rotating rod (10) through a coupling. The end of the rotating rod (10) away from the drive motor (11) is movably connected to the side of the lower frame (9) away from the support seat (2).

9. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 8, characterized in that, The outer sides of the multiple rotating rods (10) are fixedly connected to arc-shaped clamping members (13), the inner sides of the circular frame are fixedly connected to annular pads (14), and the side of the annular pads (14) away from the arc-shaped clamping members (13) is fixedly connected to an extension member (4).

10. A high-frequency plasma arc welding machine based on pipe fitting processing according to claim 9, characterized in that, The bottom end of the sliding track seat (6) is fixedly connected to a telescopic device (7), and the bottom end of the telescopic device (7) is fixedly connected to the top end of the welding head (8).

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