Welding mechanism for metal accessory machining and operation method

Abstract

The invention relates to the technical field of welding machining, in particular to a welding mechanism for metal accessory machining and an operation method.The welding mechanism comprises a bottom bracket, a positioning calibration assembly, a second clamping assembly and an adjusting assembly, an adaptive sliding rail is arranged on one side of the bottom bracket, and two C-shaped welding mounting frames are arranged on the bottom bracket; wherein one C-shaped welding installation frame is arranged on the adaptive sliding rail in a sliding mode, first clamping assemblies are arranged on the C-shaped welding installation frames, the two hubbed flanges are stably installed through the two C-shaped welding installation frames with the first clamping assemblies correspondingly, and then the two hubbed flanges are installed through the positioning calibration assembly. A plurality of bolt butt-joint holes of the two hubbed flanges are accurately aligned, then the position of the combined pipe is adjusted through the second clamping assembly and the adjusting assembly, then the auxiliary datum plate is matched with the laser transceiver, and accurate positioning of the combined pipe and the two hubbed flanges is achieved. And the welding operation efficiency and the welding operation quality of the hubbed flange and the combined pipe are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, in particular to a welding mechanism and an operating method for processing metal accessories. Background Art

[0002] Metal fittings refer to parts made of metal materials and used in various equipment, machinery, structures, etc. They are widely used in many fields. In the field of high-pressure pipelines, neck-welded flange pipe joints are a common metal pipe fittings.

[0003] In the prior art, the welding process of the neck butt-welded flange pipe joint is mainly divided into two methods: manual welding and mechanical equipment welding. Publication No. CN103143814 A's invention relates to a special equipment for circumferential welding of steel pipes and high-neck flanges, which includes a platform, a control console and a welding device. After the steel pipe and the flange are placed on a fixed fixture, the welding head can be freely adjusted up and down and forward and backward to find the center of the butt weld and weld the circumferential seam. The inside and outside of the steel pipe can be welded twice to form two inner and outer circumferential welds. When welding inside the steel pipe, the welding head extends into the steel pipe from the flange end. The welding process is fully automated, with high welding production efficiency and stable welding quality. The above scheme achieves the purpose of production efficiency through automatic control of welding. However, since the welding of the necked butt-welded flange pipe joint is different from the welding operation of the plug-in flange, manual welding is time-consuming and labor-intensive. Even if mechanical automatic welding construction is used, it is often necessary to manually spot-weld the pipe and the flange before welding, resulting in a certain misalignment deviation between the bolt connection hole or the pipe and the flange after welding for the necked butt-welded flange pipe joint, which affects cost quality and processing efficiency. Summary of the invention

[0004] The object of the present invention is to provide a welding mechanism and an operating method for metal fittings processing to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a welding mechanism and an operating method for metal fittings processing, comprising:

[0006] A bottom bracket, one side of the bottom bracket is provided with an adaptable slide rail, the bottom bracket is provided with two C-shaped welded mounting frames, one of the C-shaped welded mounting frames is slidably arranged on the adaptable slide rail, the C-shaped welded mounting frame is provided with a first clamping assembly, the first clamping assembly includes a bottom control wheel, a side support wheel and a top clamping wheel, and a neck flange is clamped between the bottom control wheel, the side support wheel and the top clamping wheel;

[0007] A positioning and calibration component, wherein the positioning and calibration component is movably arranged on one side of the C-shaped welding mounting frame, and the positioning and calibration component comprises a side bracket, a storage mounting box and an extended positioning rod, and a plurality of bolt docking holes are provided on the two neck flanges, and the two extended positioning rods are respectively inserted into one of the bolt docking holes of the two neck flanges, and laser transceivers are provided on opposite sides of the two extended positioning rods;

[0008] The second clamping assembly is arranged on the bottom bracket through the adjusting assembly and is located between the two C-shaped welding mounting frames. The second clamping assembly includes a U-shaped movable frame and two clamping frames. The adjusting assembly includes a lifting control frame and a second telescopic cylinder, and a reference plate is provided at the center of the U-shaped movable frame relative to the extended positioning rod.

[0009] Preferably, an embedding groove is provided at the lower end of the C-shaped welding mounting frame, the bottom control wheel is rotatably arranged in the embedding groove, the side supporting wheel is adjustably arranged on one side of the C-shaped welding mounting frame, a lifting clamping frame is horizontally provided at the upper end of the C-shaped welding mounting frame, and the top clamping wheel is rotatably arranged on one side of the lifting clamping frame, the bottom control wheel, the side supporting wheel and the top clamping wheel are all provided with V-shaped positioning grooves, the three sides of the neck flange are respectively inserted into the three V-shaped grooves, and the neck flange is located directly above the bottom control wheel.

[0010] Preferably, a groove is provided on one side of the C-shaped welding mounting frame, and adjustment key slots are symmetrically provided on both sides of the groove. The side supporting wheel is placed in the groove, and an adjustment screw is inserted into the center of the side supporting wheel through a bearing rotating rod. Two adjustment screws are movably passed through the two sides of the adjustment screw and are fixed by nuts.

[0011] Preferably, a first adaptation groove is opened at the upper end of the side bracket, the storage installation box is horizontally arranged in the first adaptation groove, and a plurality of first guide rods are vertically symmetrically arranged at the lower end of the storage installation box. The plurality of first guide rods are respectively arranged on the movable side brackets, and a first telescopic cylinder is vertically arranged at the center of the lower end of the first adaptation groove, and the upper end of the first telescopic cylinder is connected to the lower end of the storage installation box.

[0012] Preferably, a square spring groove is opened in the storage installation box, one side of the extended positioning rod is horizontally movably inserted in the square spring groove and is provided with a constraint plate, a return spring is sleeved on one side of the constraint plate located in the square spring groove, the side of the extended positioning rod away from the storage installation box is inserted in the bolt docking hole, the side of the extended positioning rod inserted in the bolt docking hole is a conical structure, and a pushing screw is provided on the side of the storage installation box away from the extended positioning rod through a threaded insertion, and one side of the pushing screw is in contact with the constraint plate.

[0013] Preferably, the lifting control frame is vertically arranged at the upper end of the bottom bracket, vertical guide grooves are opened at the upper ends of both sides of the lifting control frame, two vertical guide grooves are horizontally penetrated on both sides of the U-shaped movable frame, second guide rods are vertically arranged on both sides of the lower end of the U-shaped movable frame, the two second guide rods are vertically movably plugged into the lifting control frame, a pushing seat is provided at the center of the U-shaped movable frame, a second telescopic cylinder is vertically arranged at the lower end of the lifting control frame, and the upper end of the second telescopic cylinder is connected to the lower end of the pushing seat.

[0014] Preferably, horizontal slide grooves are opened on both sides of the upper end of the U-shaped movable frame, two horizontal slide rods are horizontally arranged in the horizontal slide grooves, and a slider is provided at the lower end of the clamping frame. The two sliders are respectively inserted into the two horizontal slide grooves and movably sleeved on the two horizontal slide rods. A third telescopic cylinder is provided on one side of the U-shaped movable frame close to the clamping frame, and one side of the third telescopic cylinder is connected to one side of the clamping frame.

[0015] Preferably, two clamping rollers are horizontally symmetrically provided on opposite sides of the two clamping frames through connecting ears, and a combination tube is horizontally clamped between the four clamping rollers of the two clamping frames, and both sides of the two combination tubes are respectively in contact with one side of the two neck flanges.

[0016] Preferably, a second adaptation groove is horizontally penetrated through the upper end of the pushing seat of the U-shaped movable frame, a damping slide groove is vertically opened in the center of the second adaptation groove, a reference plate is vertically movably inserted in the damping slide groove, a fourth telescopic cylinder is vertically provided at the center of the lower end of the second adaptation groove, the upper end of the fourth telescopic cylinder is connected to the lower end of the reference plate, a reference hole is opened in the center of the reference plate, and when the laser transceiver corresponds to the reference hole, the virtual axis of the combination tube is coaxial with the virtual axis of the neck flange.

[0017] An operating method for a welding mechanism for metal parts processing comprises the following steps:

[0018] Step 1: Adjust the position of the side support wheel in the keyway according to the diameter of the neck flange, so that the neck flange is directly above the bottom control wheel, and then the top clamping wheel descends to prevent the neck flange from disengagement;

[0019] Step 2: At this time, according to the distance between the virtual axis of the neck flange and the virtual axis of the bolt docking hole, the first telescopic cylinder controls the storage installation box to rise, so that the laser transceiver is located on the side of the lowest bolt docking hole. At this time, the screw rod is pushed through the thread rotation to control the extended positioning rod to be inserted into the bolt docking hole of the neck flange. During this period, if the bolt docking hole is not directly above the bottom control wheel, the neck flange can be rotated by rotating the bottom control wheel to make the bolt docking hole correspond to the laser transceiver;

[0020] Step 3: When the two laser transceivers are respectively plugged into the bolt docking holes of the two neck flanges, the several bolt docking holes of the two neck flanges are set accordingly, and then the two third telescopic cylinders extend to the clamping frame position, and the two clamping frames clamp the combined pipe horizontally through the clamping rollers. At this time, no matter how big or small the diameter of the combined pipe is, the virtual axis of the combined pipe clamped by the four clamping rollers is in a fixed position. At this time, if the length of the virtual axis of the combined pipe from the reference hole is equal to the distance between the virtual axis of the neck flange and the virtual axis of the bolt docking hole, and the reference hole corresponds to the laser transceiver, the virtual axis of the combined pipe is coaxial with the virtual axis of the neck flange. When the C-shaped welding mounting frame on one side controls the neck flange to move to the neck flange on the other side, the two sides of the combined pipe respectively abut against the two neck flanges, which is convenient for the next welding operation;

[0021] Step 4: The height adjustment of the combined tube is controlled by the second telescopic cylinder. If the distance between the virtual axis of the neck flange and the virtual axis of the bolt docking hole changes, the fourth telescopic cylinder can control the reference plate to move up and down to achieve a corresponding change in the distance between the reference hole and the virtual axis of the combined tube. Therefore, when the light of the laser transceiver passes through the reference hole and is received by another laser transceiver, the welding position of the combined tube and the two neck flanges is determined, and then stable welding is performed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The two neck flanges are stably installed respectively by two C-shaped welding mounting frames with first clamping components, and then the several bolt docking holes of the two neck flanges are accurately aligned by the positioning and calibration component. Subsequently, the position of the combination pipe is adjusted by the second clamping component and the adjustment component, and then the auxiliary reference plate is cooperated with the laser transceiver to realize the precise positioning of the combination pipe and the two neck flanges, thereby improving the welding operation efficiency and welding operation quality of the neck flanges and the combination pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0026] Figure 3 It is a schematic diagram of the local episiotomy structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 Schematic diagram of part B;

[0028] Figure 5 It is a cross-sectional view of the installation of the second clamping assembly of the present invention;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the C part;

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the D part;

[0031] Figure 8 This is a schematic diagram of the structure of the first clamping assembly of the present invention;

[0032] Fig. 9 For the present invention Figure 8 Schematic diagram of part E;

[0033] Fig.10 This is a schematic diagram of the structure of the second clamping assembly of the present invention;

[0034] Fig.11 For the present invention Fig.10 Schematic diagram of the F site.

[0035] In the figure: bottom bracket 1, adaptive slide rail 2, C-shaped welding mounting frame 3, bottom control wheel 4, side supporting wheel 5, top clamping wheel 6, adjustment keyway 7, adjustment screw 8, lifting clamping frame 9, neck flange 10, bolt docking hole 11, side bracket 12, storage mounting box 13, first guide rod 14, square spring groove 15, extended positioning rod 16, return spring 17, push screw 18, laser transceiver 19, lifting control frame 20, U-shaped movable frame 21, vertical guide groove 22, second guide rod 23, horizontal slide groove 24, horizontal slide rod 25, clamping frame 26, clamping roller 27, combination pipe 28, damping slide groove 30, reference plate 31, reference hole 32, first telescopic cylinder 33, second telescopic cylinder 34, third telescopic cylinder 35, fourth telescopic cylinder 36. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Please refer to the attached Figure 1-11 , this application provides the following technical solutions.

[0038] Embodiment 1: A welding mechanism and operation method for metal parts processing, comprising a bottom bracket 1, one side of the bottom bracket 1 is provided with an adaptable slide rail 2, two C-shaped welding mounting frames 3 are provided on the bottom bracket 1, one of the C-shaped welding mounting frames 3 is slidably arranged on the adaptable slide rail 2, and a first clamping assembly is provided on the C-shaped welding mounting frame 3, the first clamping assembly comprises a bottom control wheel 4, a side support wheel 5 and a top clamping wheel 6, and a neck flange 10 is clamped between the bottom control wheel 4, the side support wheel 5 and the top clamping wheel 6, an embedding groove is opened at the lower end of the C-shaped welding mounting frame 3, and the bottom control wheel 4, the side support wheel 5 and the top clamping wheel 6 are provided with a neck flange 10. The control wheel 4 is rotatably arranged in the embedded groove, the side supporting wheel 5 is adjustably arranged on one side of the C-shaped welding mounting frame 3, the upper end of the C-shaped welding mounting frame 3 is horizontally provided with a lifting clamping frame 9, and the top clamping wheel 6 is rotatably arranged on one side of the lifting clamping frame 9. The bottom control wheel 4, the side supporting wheel 5 and the top clamping wheel 6 are all provided with V-shaped positioning grooves, and the three sides of the neck flange 10 are respectively inserted into the three V-shaped grooves, and the neck flange 10 is located directly above the bottom control wheel 4. The bottom control wheel 4 can be driven and controlled by a motor. When the bottom control wheel 4 rotates, the neck flange 10 can be controlled to rotate.

[0039] A groove is provided on one side of the C-shaped welding mounting frame 3, and adjustment key grooves 7 are symmetrically provided on both sides of the groove. The side supporting wheel 5 is placed in the groove, and an adjusting screw 8 is inserted in the center of the side supporting wheel 5 through a bearing rotating rod. Two adjusting screws 8 are movably passed through the two sides of the adjusting screw 8 and fixed by nuts. By adjusting the key groove 7 and the adjusting screw 8, the position of the side supporting wheel 5 can be adjusted, and then according to the diameter of the neck flange 10, the neck flange 10 is located directly above the bottom control wheel 4. When the bottom control wheel 4, the side supporting wheel 5 and the top clamping wheel 6 are respectively in contact with the neck flange 10, the neck flange 10 maintains a stable vertical posture, and the top clamping wheel 6 and the bottom control wheel 4 can be appropriately misaligned to maintain the stability of the neck flange 10.

[0040] A positioning calibration component is provided to adjust the bolt docking holes 11 of the two neck flanges 10 accordingly. The positioning calibration component is movably provided on one side of the C-shaped welding mounting frame 3. The positioning calibration component includes a side bracket 12, a storage mounting box 13 and an extended positioning rod 16. A plurality of bolt docking holes 11 are provided on the two neck flanges 10. The two extended positioning rods 16 are respectively inserted into one of the bolt docking holes 11 of the two neck flanges 10, and a laser transceiver 19 is provided on the opposite side of the two extended positioning rods 16. A first adapting groove is provided at the upper end of the side bracket 12, and the storage installation box 13 is horizontally arranged in the first adapting groove. A plurality of first guide rods 14 are vertically and symmetrically provided at the lower end of the storage installation box 13. The plurality of first guide rods 14 are respectively arranged to flexibly move the side bracket 12. A first telescopic cylinder 33 is vertically provided at the lower end center of the first adapting groove, and the upper end of the first telescopic cylinder 33 is connected to the lower end of the storage installation box 13. The first telescopic cylinder 33 can adjust the upper and lower heights of the storage installation box 13 and the extended positioning rod 16;

[0041] A square spring groove 15 is opened in the storage and installation box 13, and one side of the extended positioning rod 16 is horizontally movably inserted into the square spring groove 15 and is provided with a constraint plate. The extended positioning rod 16 is located in the square spring groove 15. The constraint plate on the side of the square spring groove 15 is sleeved with a return spring 17. The side of the extended positioning rod 16 away from the storage and installation box 13 is inserted into the bolt docking hole 11, and the side of the extended positioning rod 16 inserted into the bolt docking hole 11 is a conical structure. The side of the storage and installation box 13 away from the extended positioning rod 16 is provided with a pushing screw 18 through threaded insertion, and one side of the pushing screw 18 is in contact with the constraint plate. The pushing screw 18 can also be an electric telescopic rod to realize automatic adjustment of the extended positioning rod 16 inserted into the bolt docking hole 11, and the laser transceiver 19 is located at the center of the extended positioning rod 16.

[0042] A second clamping assembly is provided to clamp and later rotate the combined pipe 28. The second clamping assembly is provided on the bottom bracket 1 between the two C-shaped welding mounting frames 3 through an adjusting assembly. The second clamping assembly includes a U-shaped movable frame 21 and two clamping frames 26. The adjusting assembly includes a lifting control frame 20 and a second telescopic cylinder 34. A reference plate 31 is provided at the center of the U-shaped movable frame 21 relative to the extended positioning rod 16. The lifting control frame 20 is vertically provided at the upper end of the bottom bracket 1. The upper ends of both sides of the lifting control frame 20 are both opened. A vertical guide groove 22 is provided, and two vertical guide grooves 22 are horizontally penetrated on both sides of the U-shaped movable frame 21. Second guide rods 23 are vertically provided on both sides of the lower end of the U-shaped movable frame 21. The two second guide rods 23 are vertically and movably plugged into the lifting control frame 20 respectively. A pushing seat is provided in the center of the U-shaped movable frame 21. A second telescopic cylinder 34 is vertically provided at the lower end of the lifting control frame 20, and the upper end of the second telescopic cylinder 34 is connected to the lower end of the pushing seat. The second telescopic cylinder 34 can adjust the upper and lower heights of the U-shaped movable frame 21.

[0043] Horizontal slide grooves 24 are provided on both sides of the upper end of the U-shaped movable frame 21, and two horizontal slide rods 25 are horizontally provided in the horizontal slide grooves 24. The lower end of the clamping frame 26 is provided with a slider, and the two sliders are respectively inserted into the two horizontal slide grooves 24 and movably sleeved with the two horizontal slide rods 25. A third telescopic cylinder 35 is provided on one side of the U-shaped movable frame 21 close to the clamping frame 26, and one side of the third telescopic cylinder 35 is connected to one side of the clamping frame 26. Two clamping rollers 27 are horizontally symmetrically provided on the opposite sides of the two clamping frames 26 through connecting ears. A group of horizontal clamping is provided between the four clamping rollers 27 of the two clamping frames 26. The two sides of the two combined pipes 28 are respectively in contact with one side of the two neck flanges 10. When welding, double-gun welding can be used for synchronous welding. After a certain length is fully welded between the combined pipe 28 and the neck flange 10, as the bottom control wheel 4 controls the rotation of the neck flange 10, the combined pipe 28 can be driven to rotate between the four clamping rollers 27 to achieve rapid welding. For the inside of the welding part of the neck flange 10 and the combined pipe 28, the welding gun can be inserted through the side of the neck flange 10 to perform internal reinforcement welding, thereby improving the connection quality between the combined pipe 28 and the neck flange 10.

[0044] Embodiment 2: On the basis of embodiment 1, a second adaptation groove is horizontally penetrated through the upper end of the pushing seat of the U-shaped movable frame 21, a damping slide groove 30 is vertically opened in the center of the second adaptation groove, a reference plate 31 is vertically movably inserted in the damping slide groove 30, a fourth telescopic cylinder 36 is vertically provided in the center of the lower end of the second adaptation groove, the upper end of the fourth telescopic cylinder 36 is connected to the lower end of the reference plate 31, a reference hole 32 is opened in the center of the reference plate 31, and when the laser transceiver 19 corresponds to the reference hole 32, the virtual axis of the combination tube 28 is coaxial with the virtual axis of the neck flange 10, and the two neck flanges 10 are correspondingly positioned in advance. At this time, the combination tube 28 is located between the two neck flanges 10 and is precisely positioned.

[0045] An operating method for a welding mechanism for metal parts processing comprises the following steps:

[0046] Step 1: Adjust the position of the side support wheel 5 in the key slot 7 according to the diameter of the neck flange 10, so that the neck flange 10 is directly above the bottom control wheel 4, and then the top clamping wheel 6 is lowered to prevent the neck flange 10 from disengaging;

[0047] Step 2: At this time, according to the virtual axis length of the neck flange 10 from the virtual axis length of the bolt docking hole 11, the first telescopic cylinder 33 controls the storage installation box 13 to rise, so that the laser transceiver 19 is located at the side of the lowest bolt docking hole 11. At this time, the screw 18 is pushed by the thread rotation to control the extended positioning rod 16 to be inserted into the bolt docking hole 11 of the neck flange 10. During this period, if the bolt docking hole 11 is not directly above the bottom control wheel 4, the bottom control wheel 4 can be rotated to rotate the neck flange 10 so that the bolt docking hole 11 corresponds to the laser transceiver 19;

[0048] Step 3: When the two laser transceivers 19 are respectively inserted into the bolt docking holes 11 of the two neck flanges 10, the several bolt docking holes 11 of the two neck flanges 10 are correspondingly arranged, and then the two third telescopic cylinders 35 extend to the position of the clamping frame 26, and the two clamping frames 26 horizontally clamp the combined pipe 28 through the clamping rollers 27. At this time, regardless of the diameter of the combined pipe 28, the virtual axis of the combined pipe 28 clamped by the four clamping rollers 27 is a fixed position. At this time, if the length of the virtual axis of the combined pipe 28 from the reference hole 32 is equal to the distance between the virtual axis of the neck flange 10 and the virtual axis of the bolt docking hole 11, and the reference hole 32 corresponds to the laser transceiver 19, the virtual axis of the combined pipe 28 is coaxial with the virtual axis of the neck flange 10. When the C-shaped welding mounting frame 3 on one side controls the neck flange 10 to move to the neck flange 10 on the other side, the two sides of the combined pipe 28 respectively abut the two neck flanges 10, which is convenient for the next welding operation;

[0049] Step 4: The height adjustment of the combined tube 28 is controlled by the second telescopic cylinder 34. If the distance between the virtual axis of the neck flange 10 and the virtual axis of the bolt docking hole 11 changes, the fourth telescopic cylinder 36 can control the reference plate 31 to move up and down to achieve a corresponding change in the distance between the virtual axis of the reference hole 32 and the combined tube 28. Therefore, when the light of the laser transceiver 19 passes through the reference hole 32 and is received by another laser transceiver 19, the welding position of the combined tube 28 and the two neck flanges 10 is determined, and then stable welding is performed.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding mechanism and operating method for metal parts processing, characterized in that: include: A bottom bracket (1), wherein an adaptable slide rail (2) is provided on one side of the bottom bracket (1), and two C-shaped welded mounting frames (3) are provided on the bottom bracket (1), wherein one of the C-shaped welded mounting frames (3) is slidably arranged on the adaptable slide rail (2), and a first clamping assembly is provided on the C-shaped welded mounting frame (3), wherein the first clamping assembly comprises a bottom control wheel (4), a side support wheel (5) and a top clamping wheel (6), and a neck flange (10) is clamped between the bottom control wheel (4), the side support wheel (5) and the top clamping wheel (6); A positioning and calibration component, the positioning and calibration component is movably arranged on one side of the C-shaped welding mounting frame (3), the positioning and calibration component comprises a side bracket (12), a storage mounting box (13) and a protruding positioning rod (16), a plurality of bolt docking holes (11) are provided on the two neck flanges (10), the two protruding positioning rods (16) are respectively inserted into one of the bolt docking holes (11) of the two neck flanges (10), and a laser transceiver (19) is provided on the opposite side of the two protruding positioning rods (16); A second clamping assembly, wherein the second clamping assembly is arranged on the bottom bracket (1) between two C-shaped welding mounting frames (3) through an adjusting assembly, the second clamping assembly comprises a U-shaped movable frame (21) and two clamping frames (26), the adjusting assembly comprises a lifting control frame (20) and a second telescopic cylinder (34), and a reference plate (31) is arranged at the center of the U-shaped movable frame (21) relative to the extended positioning rod (16).

2. A welding mechanism and operating method for metal fittings processing according to claim 1, characterized in that: The lower end of the C-shaped welding mounting frame (3) is provided with an embedding groove, the bottom control wheel (4) is rotatably arranged in the embedding groove, the side supporting wheel (5) is adjustably arranged on one side of the C-shaped welding mounting frame (3), the upper end of the C-shaped welding mounting frame (3) is horizontally provided with a lifting clamping frame (9), the top clamping wheel (6) is rotatably arranged on one side of the lifting clamping frame (9), the bottom control wheel (4), the side supporting wheel (5) and the top clamping wheel (6) are all provided with V-shaped positioning grooves, and the three sides of the neck flange (10) are respectively inserted into the three V-shaped grooves, and the neck flange (10) is located directly above the bottom control wheel (4).

3. A welding mechanism and operating method for metal parts processing according to claim 2, characterized in that: A groove is provided on one side of the C-shaped welding mounting frame (3), and adjustment key slots (7) are symmetrically provided on both sides of the groove. The side supporting wheel (5) is placed in the groove, and an adjustment screw (8) is inserted in the center of the side supporting wheel (5) through a bearing rotating rod. The two sides of the adjustment screw (8) are respectively movably penetrated through the two adjustment screws (8) and fixed by nuts.

4. A welding mechanism and operating method for metal fittings processing according to claim 3, characterized in that: A first adapting groove is provided at the upper end of the side bracket (12), a storage installation box (13) is horizontally arranged in the first adapting groove, a plurality of first guide rods (14) are vertically symmetrically arranged at the lower end of the storage installation box (13), the plurality of first guide rods (14) are respectively arranged to movably move the side bracket (12), a first telescopic cylinder (33) is vertically arranged at the center of the lower end of the first adapting groove, and the upper end of the first telescopic cylinder (33) is connected to the lower end of the storage installation box (13).

5. A welding mechanism and operating method for metal fittings processing according to claim 4, characterized in that: The storage and installation box (13) is provided with a square spring groove (15), one side of the extended positioning rod (16) is horizontally movably inserted into the square spring groove (15) and is provided with a constraint plate, and one side of the constraint plate of the extended positioning rod (16) located in the square spring groove (15) is sleeved with a return spring (17), the side of the extended positioning rod (16) away from the storage and installation box (13) is inserted into the bolt docking hole (11), and the side of the extended positioning rod (16) inserted into the bolt docking hole (11) is a conical structure, and the side of the storage and installation box (13) away from the extended positioning rod (16) is provided with a push screw (18) through a threaded insertion, and one side of the push screw (18) is in contact with the constraint plate.

6. A welding mechanism and operating method for metal parts processing according to claim 5, characterized in that: The lifting control frame (20) is vertically arranged at the upper end of the bottom bracket (1), and vertical guide grooves (22) are provided at the upper ends of both sides of the lifting control frame (20). Two vertical guide grooves (22) are horizontally penetrated at both sides of the U-shaped movable frame (21), and second guide rods (23) are vertically arranged at both sides of the lower end of the U-shaped movable frame (21). The two second guide rods (23) are respectively vertically movably plugged into the lifting control frame (20), and a pushing seat is provided at the center of the U-shaped movable frame (21). A second telescopic cylinder (34) is vertically arranged at the lower end of the lifting control frame (20), and the upper end of the second telescopic cylinder (34) is connected to the lower end of the pushing seat.

7. A welding mechanism and operating method for metal fittings processing according to claim 6, characterized in that: Horizontal slide grooves (24) are provided on both sides of the upper end of the U-shaped movable frame (21), and two horizontal slide rods (25) are horizontally provided in the horizontal slide grooves (24). A slider is provided at the lower end of the clamping frame (26), and the two sliders are respectively inserted into the two horizontal slide grooves (24) and movably sleeved on the two horizontal slide rods (25). A third telescopic cylinder (35) is provided on one side of the U-shaped movable frame (21) close to the clamping frame (26), and one side of the third telescopic cylinder (35) is connected to one side of the clamping frame (26).

8. A welding mechanism and operating method for metal fittings processing according to claim 7, characterized in that: Two clamping rollers (27) are symmetrically arranged horizontally on opposite sides of the two clamping frames (26) through connecting ears, and a combination tube (28) is horizontally clamped between the four clamping rollers (27) of the two clamping frames (26), and the two sides of the two combination tubes (28) are respectively in contact with one side of the two neck flanges (10).

9. A welding mechanism and operating method for metal fittings processing according to claim 8, characterized in that: A second adapting groove is horizontally penetrated through the upper end of the pushing seat of the U-shaped movable frame (21), a damping slide groove (30) is vertically opened in the center of the second adapting groove, a reference plate (31) is vertically movably inserted in the damping slide groove (30), a fourth telescopic cylinder (36) is vertically opened in the center of the lower end of the second adapting groove, the upper end of the fourth telescopic cylinder (36) is connected to the lower end of the reference plate (31), a reference hole (32) is opened in the center of the reference plate (31), and when the laser transceiver (19) corresponds to the reference hole (32), the virtual axis of the combined tube (28) is coaxial with the virtual axis of the neck flange (10).

10. An operating method for a welding mechanism for metal fittings processing as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: According to the diameter of the neck flange (10), the position of the side support wheel (5) in the adjustment key slot (7) is adjusted so that the neck flange (10) is directly above the bottom control wheel (4), and then the top clamping wheel (6) is lowered to prevent the neck flange (10) from disengagement; Step 2: At this time, according to the distance between the virtual axis of the neck flange (10) and the virtual axis of the bolt docking hole (11), the first telescopic cylinder (33) controls the storage installation box (13) to rise, so that the laser transceiver (19) is located on the side of the lowest bolt docking hole (11). At this time, the screw rod (18) is pushed by the thread rotation to control the extended positioning rod (16) to be inserted into the bolt docking hole (11) of the neck flange (10). During this period, if the bolt docking hole (11) is not directly above the bottom control wheel (4), the bottom control wheel (4) can be rotated to rotate the neck flange (10) so that the bolt docking hole (11) corresponds to the laser transceiver (19); Step 3: When the two laser transceivers (19) are respectively plugged into the bolt docking holes (11) of the two neck flanges (10), the plurality of bolt docking holes (11) of the two neck flanges (10) are correspondingly arranged, and then the two third telescopic cylinders (35) extend toward the position of the clamping frame (26), and the two clamping frames (26) clamp the combined tube (28) horizontally through the clamping rollers (27). At this time, regardless of the diameter of the combined tube (28), the virtual axis of the combined tube (28) clamped by the four clamping rollers (27) is in a fixed position. At this time, if the combined tube (28) is When the length of the virtual axis of the tube (28) from the reference hole (32) is equal to the length of the virtual axis of the neck flange (10) from the virtual axis of the bolt docking hole (11), and the reference hole (32) corresponds to the laser transceiver (19), the virtual axis of the combined tube (28) is coaxial with the virtual axis of the neck flange (10), and when the C-shaped welding mounting frame (3) on one side controls the neck flange (10) to move toward the neck flange (10) on the other side, the two sides of the combined tube (28) respectively abut against the two neck flanges (10), so as to facilitate the next step of welding operation; Step 4: The height adjustment of the combined tube (28) is carried out by lifting and lowering control through the second telescopic cylinder (34). If the distance between the virtual axis of the neck flange (10) and the virtual axis of the bolt docking hole (11) changes, the fourth telescopic cylinder (36) can control the reference plate (31) to move up and down to achieve a corresponding change in the distance between the virtual axis of the reference hole (32) and the combined tube (28). Therefore, when the light of the laser transceiver (19) passes through the reference hole (32) and is received by another laser transceiver (19), the welding position of the combined tube (28) and the two neck flanges (10) is determined, and then stable welding is performed.

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