Pipe high frequency welding apparatus and welding method

Abstract

The application discloses a pipe high-frequency welding equipment, which comprises a welding wire reel, a pipe clamp, a wire feeding device, a welding wire nozzle device, a high-frequency heating device and an infrared temperature measuring device.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and in particular to a high-frequency welding equipment and welding method for pipes. Background Technology

[0002] As attached Figure 1 As shown, in pipe fitting processing technology, when one end of pipe fitting 8 is spun and sealed using a spinning sealing machine, the end of pipe fitting 8 cannot be completely sealed, and a small-diameter shrinkage cavity 81 will be formed in the center of the end of pipe fitting 8. In order to achieve complete sealing of the end of pipe fitting 8, manual welding and filling of solder are required at the shrinkage cavity 81, so that the end of pipe fitting can be completely sealed.

[0003] Filling the shrinkage cavities on pipe fittings with solder by manual welding is an inefficient and costly process. Furthermore, the welding quality is inconsistent and leaks are prone to occur at the weld joints. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art and provide a high-frequency welding equipment and welding method for pipes.

[0005] The objective of this invention is achieved through the following technical solution: a high-frequency welding device for pipes, comprising:

[0006] Welding wire reel, on which welding wire is wound;

[0007] Clamping mold, used to clamp pipe fittings;

[0008] The wire feeding device is used to move the welding wire toward the clamping die.

[0009] A welding wire nozzle device includes a first moving device and a welding wire guide tube disposed on the first moving device. One end of the welding wire guide tube is provided with a welding wire nozzle, and the center of the welding wire nozzle is provided with a welding wire hole.

[0010] A high-frequency heating device includes a second moving device and a high-frequency sensor mounted on the second moving device. The high-frequency sensor is connected to a control system and is equipped with a high-frequency sensing head, which is used to inductively heat the end of the pipe fitting.

[0011] The infrared temperature measuring device, connected to the control system, is used to measure the temperature at the end of the pipe fitting and transmit the temperature information to the control system. The control system adjusts the power of the high-frequency sensor based on the temperature information.

[0012] Preferably, the wire feeding device further includes a fixed base, a first motor, a first wire guide component, a second wire guide component, a wire feeding wheel and a roller located between the first and second wire guide components. The fixed base is provided with a motor base and a fixed bracket. The first motor is fixedly mounted on the motor base, and both the first and second wire guide components are fixedly mounted on the fixed bracket. Both the first and second wire guide components are provided with wire guide holes. The wire feeding wheel is provided with a wire groove matching the wire in the circumferential direction. The wire passes between the wire feeding wheel and the roller, and the roller and the wire feeding wheel press against both sides of the wire. The wire feeding wheel is connected to the first motor.

[0013] Preferably, the wire feeding device further includes a roller frame, with rollers rotatably connected to the roller frame, one end of the roller frame rotatably connected to a fixed bracket, and a locking mechanism provided between the other end of the roller frame and the fixed bracket.

[0014] Preferably, the welding wire nozzle is made of ceramic material.

[0015] Preferably, the first moving device includes a base, a first guide rail on the base, a first sliding seat slidably connected to the first guide rail, and a first cylinder on the base for driving the first sliding seat to move; a welding wire guide tube is disposed on the first sliding seat.

[0016] Preferably, the second moving device includes a mounting base, a second guide rail on the mounting base, a second sliding seat slidably connected to the second guide rail, and a second cylinder on the mounting base for driving the second sliding seat to move; a high-frequency sensor is disposed on the second sliding seat.

[0017] Preferably, the welding wire nozzle is provided with guide holes on both sides, the guide holes are arranged radially along the welding wire nozzle, the guide holes are stepped holes, and the guide holes are provided with stepped surfaces; a stamping block is slidably connected in the guide holes, the stamping block is provided with a spring pressing surface, and a spring is provided between the spring pressing surface on the stamping block and the stepped surface in the guide hole; one end of the stamping block near the welding wire hole is a stamping end, and the other end of the stamping block is provided with a first guide slope;

[0018] A fixing block is provided on the outer side of the welding wire nozzle at a position corresponding to the guide hole. The fixing block is provided with a guide groove, which is perpendicular to the guide hole.

[0019] The welding wire guide tube is equipped with a fixed plate and a sliding ring. The sliding ring is slidably connected to the welding wire guide tube. The fixed plate is equipped with a drive mechanism for driving the sliding ring to move. The sliding ring is equipped with a transmission rod corresponding to the stamping block. One end of the transmission rod is connected to the sliding ring, and the other end of the transmission rod is equipped with a second guide slope that extends into the guide groove on the fixed block. The second guide slope is parallel to and in contact with the first guide slope. The welding wire is stamped by the two stamping blocks to form a neck section on the welding wire. The diameter of the neck section is smaller than the diameter of the welding wire.

[0020] Preferably, the driving mechanism includes a second motor mounted on a fixed plate, a lead screw mounted on the second motor, the lead screw being parallel to the welding wire guide tube; and a threaded hole on the sliding ring corresponding to the lead screw, with the lead screw and the threaded hole being threadedly engaged.

[0021] A welding method for a high-frequency welding equipment for pipes includes the following specific steps:

[0022] S1: The welding wire passes through the wire feeding mechanism, the welding wire guide tube and the welding wire nozzle in sequence; the pipe fitting is clamped by the clamping mold, with the end of the pipe fitting with the shrinkage cavity facing the welding wire nozzle;

[0023] S3: The high-frequency heating device is moved to the heating position by the second cylinder. After the high-frequency sensor moves to the heating position, the high-frequency sensing head on the high-frequency sensor corresponds to the end of the pipe fitting. The welding wire nozzle is moved towards the end of the pipe fitting by the first cylinder and reaches the welding position. When the welding wire nozzle reaches the welding position, the front end of the welding wire nozzle is 3-5 mm away from the shrinkage cavity on the pipe fitting. The wire feeding mechanism drives the welding wire to move, so that one end of the welding wire extends out of the welding wire nozzle and contacts the shrinkage cavity on the pipe fitting.

[0024] S3: The welding wire is stamped by the first and second stamping blocks to form a neck section on the welding wire; during the stamping of the welding wire, the lead screw is driven to rotate by the second motor. When the lead screw rotates, it drives the sliding ring to move towards the welding wire tip. The sliding ring drives the transmission rod to move. With the cooperation of the first and second guide inclined surfaces, the two stamping blocks are driven to move towards the center of the welding wire head. The welding wire is stamped by the stamping end on the stamping block to form a neck section on the welding wire; after the stamping is completed, the two stamping blocks are reset.

[0025] S4: The high-frequency inductor is turned on and induction heats the end of the pipe fitting, melting the welding wire. During this process, the welding wire is continuously fed by the wire feeding mechanism until the neck section of the welding wire contacts the pipe fitting, at which point the wire feeding stops. The diameter of the neck section is smaller than that of the welding wire. When the neck section of the welding wire contacts the heated end of the pipe fitting, it melts, causing the welding wire to break and the weld point on the pipe fitting to separate. Then the high-frequency inductor stops heating.

[0026] S5: The welding wire nozzle is driven back to its initial position by the first cylinder, and the high-frequency sensor is driven back to its initial position by the second cylinder; the welded pipe fitting is then removed from the clamping mold. The beneficial effects of this invention are: it enables automatic welding and sealing of shrinkage cavities in pipe fittings, achieving a high degree of automation, high processing efficiency, reduced labor costs, and improved welding quality. Furthermore, during the induction heating process at the pipe fitting end, the temperature at the pipe fitting end is monitored in real time by an infrared temperature measuring device. The control system adjusts the power of the high-frequency sensor based on the temperature information, ensuring that the heating temperature at the pipe fitting end remains within a stable and controllable range. This prevents damage to the pipe fitting due to excessive heating, and also avoids affecting welding quality due to excessively high or low heating temperatures. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an existing pipe fitting after spin sealing.

[0028] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the invention.

[0029] Figure 3 This is a schematic diagram of the wire feeding device in Embodiment 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the welding wire nozzle device in Embodiment 1 of the present invention.

[0031] Figure 5 This is a schematic diagram of the high-frequency heating device in Embodiment 1 of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure of the welding wire guide tube in Embodiment 2 of the present invention.

[0033] Figure 7 for Figure 6 Enlarged view of section A.

[0034] Figure 8 This is a schematic diagram of the structure of the stamping block in one direction.

[0035] Figure 9 This is a schematic diagram of the stamping block from another direction.

[0036] Figure 10 This is a schematic diagram of the stamping process for welding wire.

[0037] Figure 11 This is a schematic diagram of the welding wire after it has been stamped.

[0038] In the diagram: 1. Welding wire winch; 2. Wire feeding device; 21. Fixed base; 22. Motor base; 23. First motor; 24. Rotating shaft; 25. Fixed bracket; 26. First welding wire guide component; 27. Second welding wire guide component; 28. Bearing seat; 29. ​​Wire feeding wheel; 210. Roller frame; 211. Roller; 212. Locking notch; 214. Locking lever; 215. Snap ring; 3. Welding wire nozzle device; 31. Base; 32. First guide rail; 33. First sliding seat; 34. First cylinder; 35. Welding wire guide tube; 36. Welding wire nozzle; 37. 310. Welding wire hole; 311. Stamping block; 312. Transmission rod; 313. Fixing plate; 314. Sliding ring; 315. Second motor; 316. Lead screw; 317. Fixing block; 318. Guide groove; 319. First guide slope; 320. Spring; 4. Stamping end; 5. Welding wire; 41. Neck section; 5. High-frequency heating device; 52. Mounting base; 53. Second guide rail; 54. Second cylinder; 55. High-frequency sensor; 56. High-frequency sensing head; 57. Second sliding seat; 6. Temperature measuring device; 7. Clamping mold; 8. Pipe fitting; 88. Shrinkage hole. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0040] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0041] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0042] Example 1:

[0043] like Figure 2-5As shown, a high-frequency welding equipment for pipes includes: a welding wire reel 1, a clamping mold 7, a wire feeding device 2, a welding wire nozzle device 3, a high-frequency heating device 5, and an infrared temperature measuring device 6; welding wire 4 is wound on the welding wire reel 1.

[0044] The wire feeding device 2 is located on one side of the welding wire reel 1 and is used to drive the welding wire 4 towards the clamping die 7. The wire feeding device 2 includes a fixed base 21, a first motor 23, a first welding wire guide component 26, a second welding wire guide component 27, a wire feeding wheel 29 and a roller 211 located between the first welding wire guide component 26 and the second welding wire guide component 27. The fixed base 21 is equipped with a motor base 22 and a fixed bracket 25, and the first motor 23 is fixedly mounted on the motor base 22. The first welding wire guide component 26 and the second welding wire guide component 27 are respectively fixedly mounted on both sides of the fixed bracket 25, and both the first welding wire guide component 26 and the second welding wire guide component 27 are provided with welding wire guide holes.

[0045] The wire feed wheel 29 is connected to the first motor 23. Specifically, a rotating shaft 24 is connected to the output shaft of the first motor 23, and the wire feed wheel 29 is mounted on the rotating shaft 24. The wire feed wheel 29 has a wire groove in its circumferential direction that matches the welding wire 4. The welding wire 4 passes between the wire feed wheel 29 and the roller 211, and is embedded in the wire groove. The roller 211 and the wire feed wheel 29 press the two sides of the welding wire 4 together. A bearing seat 28 is provided on the fixed bracket 25, and the end of the rotating shaft 24 away from the first motor 23 is connected to the bearing seat 28. The bearing seat 28 supports one end of the rotating shaft 24.

[0046] The wire feeding device 2 also includes a roller frame 210, with rollers 211 rotatably connected to the roller frame 210. One end of the roller frame 210 is rotatably connected to a fixed bracket 25, and a locking mechanism is provided between the other end of the roller frame 210 and the fixed bracket 25. The locking mechanism includes a locking notch 212 at one end of the roller frame 210 and a locking lever 214 rotatably connected to the fixed bracket 25. The locking lever 214 has a retaining ring 215, the outer diameter of which is larger than the width of the locking notch 212. The roller frame can be opened to facilitate loading the welding wire between the wire feeding wheel and the roller. To close the roller frame, simply close it, then rotate the locking lever upwards, causing the retaining ring 215 on the locking lever to engage above the locking notch of the roller frame, thus locking the roller frame. After the roller frame is locked, the rollers press against one side of the welding wire, exerting pressure on the wire.

[0047] The welding wire nozzle device 3 is disposed on one side of the wire feeding device 2. The welding wire nozzle device 3 includes a first moving device and a welding wire guide tube 35 disposed on the first moving device. One end of the welding wire guide tube 35 is provided with a welding wire nozzle 36, and the center of the welding wire nozzle 36 is provided with a welding wire hole 37. The first moving device includes a base 31, on which a first guide rail 32 is provided. A first sliding seat 33 is slidably connected to the first guide rail 32. A first cylinder 34 for driving the first sliding seat 33 to move is provided on the base 31. The piston rod of the first cylinder 34 is connected to the first sliding seat 33. The welding wire guide tube 35 is disposed on the first sliding seat 33. In this embodiment, the welding wire nozzle 36 is made of ceramic material, which has good high-temperature resistance.

[0048] A high-frequency heating device 5 is located on one side of the welding wire nozzle device 3. The high-frequency heating device 5 includes a second moving device and a high-frequency sensor 54 mounted on the second moving device. The high-frequency sensor 54 is connected to the control system and has a high-frequency sensing head 55, which is used to inductively heat the end of the pipe fitting 8. The second moving device includes a mounting base 51, on which a second guide rail 52 is mounted. A second sliding seat 56 is slidably connected to the second guide rail 52. A second cylinder 53 is mounted on the mounting base 51 to drive the second sliding seat 56 to move, and the piston rod of the second cylinder 53 is connected to the second sliding seat 56. The high-frequency sensor 54 is mounted on the second sliding seat 56.

[0049] Infrared temperature measuring device 6 is connected to the control system to measure the temperature of the end of the pipe fitting 8 and transmit the temperature information to the control system. The control system adjusts the power of the high-frequency sensor 54 based on the temperature information. The infrared temperature measuring device 6 is positioned directly over the end of the pipe fitting. During the heating process of the pipe fitting, when the temperature of the pipe fitting end is higher than the set temperature, the control system reduces the power of the high-frequency sensor 54, thereby lowering the heating temperature and causing the end temperature of the pipe fitting to drop. Conversely, when the temperature of the pipe fitting end is lower than the set temperature, the control system increases the power of the high-frequency sensor 54, thereby increasing the heating temperature and causing the end temperature of the pipe fitting to rise. Through this feedback adjustment method, the heating temperature of the pipe fitting end is kept within a stable and controllable range, preventing damage to the pipe fitting due to excessive heating temperature, and also preventing welding quality from being affected by excessively high or low heating temperatures.

[0050] The clamping mold 7 is positioned directly opposite the welding wire nozzle device 3, and is used to clamp the pipe fitting 8.

[0051] The high-frequency welding equipment for pipes in this embodiment includes the following specific steps when performing sealing welding on the ends of pipe fittings:

[0052] S1: The welding wire passes through the wire feeding mechanism, the welding wire guide tube and the welding wire nozzle in sequence; the pipe fitting is clamped by the clamping mold, with the end of the pipe fitting with the shrinkage cavity facing the welding wire nozzle;

[0053] S3: The high-frequency heating device is moved to the heating position by the second cylinder. After the high-frequency sensor moves to the heating position, the high-frequency sensing head on the high-frequency sensor corresponds to the end of the pipe fitting. The welding wire nozzle is moved towards the end of the pipe fitting by the first cylinder and reaches the welding position. When the welding wire nozzle reaches the welding position, the front end of the welding wire nozzle is 3-5 mm away from the shrinkage cavity on the pipe fitting. The wire feeding mechanism drives the welding wire to move, so that one end of the welding wire extends out of the welding wire nozzle and contacts the shrinkage cavity on the pipe fitting.

[0054] S3: The high-frequency inductor is turned on and induction heats the end of the pipe fitting, melting the welding wire. During this process, the welding wire is continuously fed through the wire feeding mechanism. After the welding wire melts, it fills the shrinkage cavity on the pipe fitting. The welding wire stops moving after being fed a certain distance. Then the high-frequency inductor stops heating.

[0055] S5: The welding wire nozzle is driven back to its initial position by the first cylinder, and the high-frequency sensor is driven back to its initial position by the second cylinder; the welded pipe fitting is then removed from the clamping mold. This invention enables automatic welding and sealing of shrinkage cavities in pipe fittings, achieving a high degree of automation, high processing efficiency, reduced labor costs, and improved welding quality. Furthermore, during the induction heating process at the pipe fitting end, the temperature at the pipe fitting end is monitored in real time by an infrared temperature measuring device. The control system adjusts the power of the high-frequency sensor based on the temperature information, ensuring that the heating temperature at the pipe fitting end remains within a stable and controllable range. This prevents damage to the pipe fitting due to excessive heating, and also avoids affecting welding quality due to excessively high or low heating temperatures.

[0056] Example 2:

[0057] like Figure 6-11 As shown: The difference between Embodiment 2 and Embodiment 1 is that: In Embodiment 2, guide holes are provided on both sides of the welding wire nozzle 36. The guide holes are arranged radially along the welding wire nozzle and are stepped holes with stepped surfaces. A stamping block 310 is slidably connected in the guide hole. A spring pressing surface is provided on the stamping block 310. A spring 319 is provided between the spring pressing surface on the stamping block 310 and the stepped surface in the guide hole. One end of the stamping block 310 near the welding wire hole 37 is a stamping end 320, and the other end of the stamping block 310 is provided with a first guide inclined surface 318.

[0058] A fixing block 316 is provided on the outer side of the welding wire nozzle 36 at a position corresponding to the guide hole. A guide groove 317 is provided on the fixing block 316, and the guide groove 317 is perpendicular to the guide hole.

[0059] The welding wire guide tube 35 is provided with a fixed plate 312 and a sliding ring 313. The sliding ring 313 is slidably connected to the welding wire guide tube 35. The fixed plate 312 is provided with a drive mechanism for driving the sliding ring 313 to move. The drive mechanism includes a second motor 314 provided on the fixed plate 312. The second motor 314 is provided with a lead screw 315, which is parallel to the welding wire guide tube 35. The sliding ring 313 is provided with a threaded hole corresponding to the lead screw 315, and the lead screw 315 and the threaded hole are threadedly engaged.

[0060] The sliding ring 313 is provided with a transmission rod 311 corresponding to the stamping block 310. One end of the transmission rod 311 is connected to the sliding ring 313, and the other end of the transmission rod 311 is provided with a second guide slope and extends into the guide groove 317 on the fixed block 316. The second guide slope is parallel to and in contact with the first guide slope 318. The welding wire 4 is stamped by the two stamping blocks 310 to form a neck section 41 on the welding wire 4. The diameter of the neck section is smaller than the diameter of the welding wire.

[0061] The high-frequency welding equipment for pipes in this embodiment includes the following specific steps when performing sealing welding on the ends of pipe fittings:

[0062] S1: The welding wire passes through the wire feeding mechanism, the welding wire guide tube and the welding wire nozzle in sequence; the pipe fitting is clamped by the clamping mold, with the end of the pipe fitting with the shrinkage cavity facing the welding wire nozzle;

[0063] S3: The high-frequency heating device is moved to the heating position by the second cylinder. After the high-frequency sensor moves to the heating position, the high-frequency sensing head on the high-frequency sensor corresponds to the end of the pipe fitting. The welding wire nozzle is moved towards the end of the pipe fitting by the first cylinder and reaches the welding position. When the welding wire nozzle reaches the welding position, the front end of the welding wire nozzle is 3-5 mm away from the shrinkage cavity on the pipe fitting. The wire feeding mechanism drives the welding wire to move, so that one end of the welding wire extends out of the welding wire nozzle and contacts the shrinkage cavity on the pipe fitting.

[0064] S3: The welding wire is stamped by the first and second stamping blocks to form a neck section on the welding wire; during the stamping of the welding wire, the lead screw is driven to rotate by the second motor. When the lead screw rotates, it drives the sliding ring to move towards the welding wire tip. The sliding ring drives the transmission rod to move. With the cooperation of the first and second guide inclined surfaces, the two stamping blocks are driven to move towards the center of the welding wire head. The welding wire is stamped by the stamping end on the stamping block to form a neck section on the welding wire; after the stamping is completed, the two stamping blocks are reset.

[0065] S4: The high-frequency inductor is turned on and induction heats the end of the pipe fitting, melting the welding wire. During this process, the welding wire is continuously fed by the wire feeding mechanism until the neck section of the welding wire contacts the pipe fitting, at which point the wire feeding stops. The diameter of the neck section is smaller than that of the welding wire. When the neck section of the welding wire contacts the heated end of the pipe fitting, it melts, causing the welding wire to break and the weld point on the pipe fitting to separate. Then the high-frequency inductor stops heating.

[0066] S5: Drive the welding wire nozzle to return to the initial position via the first cylinder, and drive the high-frequency sensor to return to the initial position via the second cylinder; remove the welded pipe from the clamping mold.

[0067] In this embodiment, during the welding process, two stamping blocks are used to stamp a neck section on the welding wire. The diameter of the neck section is smaller than the diameter of the welding wire. During the welding process, when the welding wire melts to the neck section, because the neck section is thinner, it is easy for it to melt and break after being heated. This allows the welding wire to separate from the weld point on the pipe, thus avoiding the situation where the welding wire sticks to the weld point on the pipe after welding, making it difficult to separate the welding wire from the pipe.

[0068] The remaining structures of Example 2 are the same as those of Example 1.

[0069] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A high-frequency tube welding apparatus characterized by comprising: The utility model relates to a welding wire feeding device, which comprises the following components: a welding wire reel on which welding wire is wound; a die clamp for clamping a pipe; a welding wire feeding device for moving the welding wire towards the die clamp; a welding wire nozzle device, which comprises a first moving device and a welding wire guide tube arranged on the first moving device, one end of the welding wire guide tube being provided with a welding wire nozzle, the center of the welding wire nozzle being provided with a welding wire hole; the first moving device comprises a base, a first guide rail is arranged on the base, a first sliding seat is slidably connected to the first guide rail, a first cylinder for driving the first sliding seat to move is arranged on the base; the welding wire guide tube is arranged on the first sliding seat; both sides of the welding wire nozzle are respectively provided with guide holes, the guide holes are arranged along the radial direction of the welding wire nozzle, the guide holes are stepped holes, and a stepped surface is arranged in the guide holes; a stamping block is slidably connected in the guide hole, a spring abutting surface is arranged on the stamping block, and a spring is arranged between the spring abutting surface on the stamping block and the stepped surface in the guide hole; one end of the stamping block close to the welding wire hole is a stamping end, and the other end of the stamping block is provided with a first guide inclined surface; a fixed block is arranged at a position corresponding to the guide hole on the outside of the welding wire nozzle, a guide groove is arranged on the fixed block, and the guide groove is perpendicular to the guide hole; a fixed plate and a sliding ring are arranged on the welding wire guide tube, the sliding ring is slidably connected to the welding wire guide tube, and a driving mechanism for driving the sliding ring to move is arranged on the fixed plate; a transmission rod corresponding to the stamping block is arranged on the sliding ring, one end of the transmission rod is connected to the sliding ring, the other end of the transmission rod is provided with a second guide inclined surface and extends into the guide groove on the fixed block, the second guide inclined surface is parallel to and in contact with the first guide inclined surface; the two stamping blocks are used for stamping the welding wire, so that a necking section is formed on the welding wire, and the diameter of the necking section is smaller than the diameter of the welding wire; a high-frequency heating device, which comprises a second moving device and a high-frequency inductor arranged on the second moving device, the high-frequency inductor is connected to a control system, a high-frequency induction head is arranged on the high-frequency inductor, and the high-frequency induction head is used for inductively heating the end of the pipe; the second moving device comprises a mounting seat, a second guide rail is arranged on the mounting seat, a second sliding seat is slidably connected to the second guide rail, and a second cylinder for driving the second sliding seat to move is arranged on the mounting seat; the high-frequency inductor is arranged on the second sliding seat; an infrared temperature measuring device, which is connected to the control system, is used for measuring the temperature of the end of the pipe and transmitting temperature information to the control system, and the control system adjusts the power of the high-frequency inductor according to the temperature information.

2. The tube high-frequency welding apparatus according to claim 1, wherein The welding wire feeding device further comprises a fixed seat, a first motor, a first welding wire guide component, a second welding wire guide component, a welding wire feeding wheel and a roller between the first welding wire guide component and the second welding wire guide component, a motor seat and a fixed support are arranged on the fixed seat, the first motor is fixedly arranged on the motor seat, and the first welding wire guide component and the second welding wire guide component are fixedly arranged on the fixed support; welding wire guide holes are arranged on the first welding wire guide component and the second welding wire guide component; a welding wire groove matched with the welding wire is arranged in the circumferential direction of the welding wire feeding wheel; the welding wire passes between the welding wire feeding wheel and the roller, and the roller and the welding wire feeding wheel press the two sides of the welding wire; the welding wire feeding wheel is connected to the first motor.

3. A tube high-frequency welding apparatus according to claim 2, wherein The wire feeding device further comprises a roller frame, a roller is rotatably connected to the roller frame, one end of the roller frame is rotatably connected to the fixed support, and a locking mechanism is arranged between the other end of the roller frame and the fixed support.

4. The tube high-frequency welding apparatus according to claim 1, wherein The welding wire nozzle is made of ceramic material.

5. The tube high-frequency welding apparatus according to claim 1, wherein The driving mechanism comprises a second motor arranged on the fixed plate, a screw rod arranged on the second motor, the screw rod being parallel to the welding wire guide tube, a threaded hole corresponding to the screw rod being arranged on the sliding ring, and the screw rod being in threaded connection with the threaded hole.

6. A welding method of the pipe high frequency welding apparatus according to claim 5, characterized by, The method comprises the following specific steps: S1: the welding wire sequentially passes through the wire feeding mechanism, the welding wire guide tube and the welding wire nozzle; the pipe is clamped by the clamp mold, and the end of the pipe with the shrinkage hole faces the welding wire nozzle; S3: the high-frequency heating device is driven by the second cylinder to move to the heating position, after the high-frequency inductor moves to the heating position, the high-frequency induction head on the high-frequency inductor corresponds to the end of the pipe; the welding wire nozzle is driven by the first cylinder to move towards the end of the pipe and reach the welding position, when the welding wire nozzle reaches the welding position, the front end of the welding wire nozzle is 3-5 mm away from the shrinkage hole on the pipe; the wire feeding mechanism drives the welding wire to move, so that one end of the welding wire extends out of the welding wire nozzle and contacts the position of the shrinkage hole on the pipe; S3: the welding wire is stamped by the first stamping block and the second stamping block, so that a necking section is formed on the welding wire; when the welding wire is stamped, the screw rod is driven to rotate by the second motor, the screw rod drives the sliding ring to move towards the welding wire nozzle when rotating, the sliding ring drives the transmission rod to move, under the cooperation of the first guide slope and the second guide slope, the two stamping blocks are driven to move towards the center of the welding wire head, the welding wire is stamped by the stamping end on the stamping block, so that a necking section is formed on the welding wire; after stamping, the two stamping blocks are reset; S4: the high-frequency inductor is turned on and inductively heats the end of the pipe, so that the welding wire is melted; in this process, the wire feeding mechanism continuously feeds the welding wire until the necking section on the welding wire contacts the pipe and stops feeding the welding wire; the diameter of the necking section is smaller than that of the welding wire, the necking section on the welding wire melts when contacting the heated end of the pipe, so that the welding wire is melted and separated from the welding point on the pipe; then the high-frequency inductor stops heating; S5: the welding wire nozzle is driven by the first cylinder to return to the initial position, and the high-frequency inductor is driven by the second cylinder to return to the initial position; the welded pipe is taken off from the clamp mold. S5: the welding wire nozzle is driven by the first cylinder to return to the initial position, and the high-frequency inductor is driven by the second cylinder to return to the initial position; the welded pipe is taken off from the clamp mold.

Images