Flange welding processing technology

Abstract

The flange welding machining technology comprises the following steps that S100, a shaft rod is located at the top of a sliding groove, then a flange plate body is placed in an inserting groove, finally, a pipe fitting body is placed on a second rolling wheel, and the preparation procedure before welding is completed; and S200, a first telescopic cylinder is used for controlling horizontal movement of a shaft rod, a second telescopic cylinder is used for controlling vertical movement of the shaft rod, the shaft rod is used for moving the flange plate bodies in the inserting grooves to the upper portions of the sliding grooves, the multiple flange plate bodies are temporarily stored in the frame body at a time, rapid loading is achieved in cooperation with a crane, time and labor are saved, and convenience and high efficiency are achieved. The automatic calibration function of the pipe fitting body is achieved through alternate cooperation of a first rolling wheel and a second rolling wheel, the flange welding precision is improved, the welding effect is better, automatic feeding of the flange plate body can be achieved through cooperation of a second fixing plate capable of moving vertically and horizontally, the labor intensity of workers is greatly relieved, and the working efficiency is improved. The production requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of flange welding, and in particular to a flange welding processing technology. Background Art

[0002] A flange is usually a disc-shaped metal part with bolt holes around it, which is used to connect two devices or pipelines by bolting. Flanges are widely used in various fields such as pipeline engineering, equipment connection, and the automotive industry because of their convenient and fast connection method. When using flanges as connectors, electric welding is usually used to connect them to pipe fittings. On the one hand, it ensures the sealing between the pipe fittings and the flange, and on the other hand, it ensures the connection strength between the pipe fittings and the flange, which can provide a good user experience after installation.

[0003] Patent CN119525879A discloses a flange body welding device for flange production, which is a horizontal flange welding structure. When in use, the flange body is first placed between fixed frames, and the three clamping rods are moved toward the center of the fixed frame through round rods, brake blocks, rotating sleeves, fixed sleeves, and auxiliary sleeves to achieve positioning and clamping of the flange body, and then the pipe is clamped and positioned through the rotating rod and the clamping frame. Finally, the pipe can be rotated by rotating the rotating roller to facilitate subsequent welding operations.

[0004] Patent CN222133955U discloses a flange welding device for flange production, which is a vertical flange welding mechanism. When used, the flange is placed between two limit clamps, and the limit clamps are used to clamp and fix the flange. The flange can be welded in conjunction with a fixed motor.

[0005] In the technical solutions of the above two patents, no matter whether it is vertical or horizontal flange welding equipment, loading is achieved by manually placing flanges. In addition, pipe fittings also need to be placed manually with the help of cranes. Therefore, in actual applications, due to the huge demand for pipe fittings welded with flanges, the work task is relatively heavy. The method of manually placing flanges one by one is not only inefficient, but also prone to fatigue, with high work intensity, and cannot meet production needs. Summary of the invention

[0006] The purpose of the present invention is to provide a flange welding processing technology to solve the technical problems in the prior art that due to the large welding requirements of the flange, the flanges are manually placed one by one, which is inefficient, labor-intensive, and cannot meet production needs.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A flange welding process comprises the following steps:

[0009] S100: First, place the shaft at the top of the slide slot, then place the flange body in the slot, and finally place the pipe body on the second roller to complete the pre-welding preparation process;

[0010] S200: Using the first telescopic cylinder to control the horizontal movement of the shaft rod, using the second telescopic cylinder to control the vertical movement of the shaft rod, using the shaft rod to move the flange body inside the slot to the upper part of the slide groove so that it is coaxial with the pipe body, thereby completing the initial feeding process of the flange;

[0011] S300: The first servo motor cooperates with the rotating shaft to control the directions of the first cam and the second cam, thereby controlling the heights of the first U-shaped frame and the second U-shaped frame, and then cooperates with the first roller and the second roller to allow the pipe body to only move axially and then only rotate circumferentially, thereby completing the feeding process of the pipe body;

[0012] S400: The second servo motor drives the conveyor belt to rotate through the transmission shaft, and the conveyor belt drives all the flange bodies on the rotating shaft to move synchronously step by step through the cutout, thereby completing the final loading process of the flange body;

[0013] S500: The adjusting rod pushes the hinge block to move toward one end of the pipe body, driving the inner support plate to expand outward, thereby clamping the inner support of the pipe body. The shaft rod drives the pipe body to rotate synchronously, and the welding machine is used to achieve the welding operation between the pipe body and the flange body.

[0014] S600: Allow the pipe body to move only in the axial direction, thereby completing the blanking process of the pipe body;

[0015] S700: Use a crane to lift the pipe body to which the flange body is not welded onto the second roller, first push the pipe body toward the shaft with the second roller that can rotate actively, and then repeat steps S200 to S700 to complete the welding process of the flange bodies in all slots in sequence;

[0016] S800: After all the flange bodies temporarily stored on the shaft are welded and used, repeat all the above steps to start a new round of welding operations.

[0017] Preferably, in the step S200, the first telescopic cylinder is first used to drive the movable plate away from the frame body, so that the shaft rod is pulled out from the inside of the slide groove, and then the second telescopic cylinder is used to drive the second fixed plate to move downward, so that the shaft rod is coaxial with the semicircular slot; the first telescopic cylinder is used again to drive the movable plate to move, so that the shaft rod is re-extended into the slide groove, and extended into the inside of the slot to string all the flange bodies, and then the second telescopic cylinder is used again to drive the shaft rod to rise, so that the shaft rod and the pipe body are coaxial again.

[0018] Preferably, in the step S300, the first servo motor is used to move the raised portion of the first cam downward and the raised portion of the second cam upward, thereby moving all the second U-shaped frames downward and all the first U-shaped frames upward, thereby causing the second roller to come into contact with the pipe body, allowing the pipe body to move only axially; then the first servo motor is used to rotate 180° again, causing the first roller to come into contact with the pipe body, allowing the pipe body to rotate only circumferentially.

[0019] Preferably, the second roller is driven to rotate by a motor so that the pipe body can be transported toward the shaft rod, so that the port of the pipe body is docked with the port of the shaft rod.

[0020] Preferably, in step S400, the second servo motor drives the transmission shaft to rotate, and the transmission shaft drives the conveyor belt to rotate. Through the cutout with the same thickness as the flange body opened on the conveyor belt, the conveyor belt drives all the flange bodies to move synchronously on the rotating shaft in a step-by-step manner when the conveyor belt rotates.

[0021] Preferably, in step S500, the third telescopic cylinder pushes the hinge block to move toward one end close to the pipe body through the adjusting rod, and the adjusting rod pushes the second hinge rod through the hinge block, so that the inner support plate expands outward to internally support and clamp the pipe body.

[0022] Preferably, the long rod and the adjusting rod cannot rotate relative to each other in the circumferential direction due to the action of a key, and the long rod and the shaft rod are fixedly connected via a flange, so that when the shaft rod rotates, the pipe body is driven to rotate synchronously.

[0023] Preferably, in the step S500, the driving motor drives the shaft to rotate through the transmission member, and the shaft rotates to drive the pipe body to rotate; at the same time, the welding machine is used to cooperate with the rotating pipe body to complete the welding operation between the pipe body and the flange body.

[0024] Preferably, in the step S100, the flange body is placed into the corresponding through slot at the flange loading location, and the flange body automatically slides into the slot by its own gravity.

[0025] Beneficial effects of the present invention:

[0026] 1. The present invention temporarily stores multiple flange bodies inside the frame at one time and cooperates with a crane to achieve rapid loading, which saves time and effort, is convenient and efficient, and then uses the alternating cooperation of the first roller and the second roller to achieve automatic calibration of the pipe body, improve the flange welding accuracy, and achieve better welding effect. In combination with the second fixed plate that can move vertically and horizontally, automatic loading of the flange body can be achieved, which greatly reduces the labor intensity of the staff, improves the working efficiency, and adapts to production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a cross-sectional view of the present invention;

[0030] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0031] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0032] Figure 5 It is a structural schematic diagram of the frame in the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the long rod in the present invention;

[0034] Figure 7 It is a structural schematic diagram of the first U-shaped frame and the second U-shaped frame in the present invention.

[0035] In the figure:

[0036] 1. frame; 101. outer protrusion; 102. through groove; 103. slide groove; 104. slot; 105. limit groove; 106. flange body;

[0037] 2. Pipe fitting body; 201. Plate frame; 202. Guide groove; 203. First U-shaped frame; 204. Second U-shaped frame; 205. First roller; 206. Second roller; 207. First cam; 208. Second cam; 209. Rotating shaft; 210. First servo motor;

[0038] 3. Axle rod; 301. Moving plate; 302. Traveling wheel; 303. First telescopic cylinder; 304. Second telescopic cylinder; 305. First fixed plate; 306. Guide rod; 307. Second fixed plate; 308. Bearing seat; 309. Driving motor; 310. Transmission member;

[0039] 4. Long rod; 401. Sliding groove; 402. Adjusting rod; 403. Inner support plate; 404. First hinge rod; 405. Second hinge rod; 406. Hinge block; 407. Round connecting plate; 408. Round plate; 409. Third telescopic cylinder;

[0040] 5. Vertical plate; 501. Conveyor belt; 502. Incision; 503. Transmission shaft; 504. Second servo motor. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-Figure 2 As shown, a flange welding process includes a frame 1, a pipe body 2, a shaft rod 3 and a plurality of flange bodies 106; the pipe body 2 and the shaft rod 3 are coaxially arranged, and the flange body 106 is movably sleeved on the shaft rod 3.

[0043] Please refer again Figure 1 , Figure 2 as well as Figure 5 As shown, an outer convex portion 101 is fixedly connected to one side of the middle part of the frame body 1; a plurality of evenly distributed through grooves 102 are provided on the outer convex portion 101, and the through grooves 102 are used to place the flange body 106, so as to facilitate the loading of the flange body 106; a slide groove 103 is provided inside the frame body 1, and the width of the slide groove 103 is equal to the diameter of the flange body 106; a limiting groove 105 corresponding to the through groove 102 is provided at a position corresponding to the bottom of the slide groove 103 on the frame body 1, and the limiting groove 105 is connected with the through groove 102, and the thickness of the limiting groove 105, the through groove 102 and the flange are all the same; a slot 104 is provided on the frame body 1 corresponding to the middle position at the bottom of the limiting groove 105, and the slot 104 is a semicircular structure, and the radius of the slot 104 is equal to the radius of the shaft rod 3.

[0044] Please refer again Figure 1 , Figure 2 as well as Figure 5 As shown, a symmetrically arranged vertical plate 5 is fixedly connected in the middle of the top of the frame 1, and the vertical plate 5 has the same length as the frame 1; transmission shafts 503 are rotatably connected at both ends of the vertical plate 5; a conveyor belt 501 of meshing transmission is arranged on the transmission shaft 503 corresponding to the position between the vertical plates 5; a cutout 502 is opened on the conveyor belt 501, and the width of the cutout 502 is equal to the thickness of the flange body 106, which is used to carry the flange body 106 to move step by step on the shaft 3; a second servo motor 504 is also fixedly arranged on the top of the frame 1, and the output end of the second servo motor 504 is mutually transmitted to one of the transmission shafts 503.

[0045] Please refer again Figure 1 and Figure 2As shown, a movable plate 301 is provided on the side of the frame 1 away from the pipe body 2; the movable plate 301 is supported on the ground via walking wheels 302; a second telescopic cylinder 304 is fixedly provided in the middle of the movable plate 301; the upper part and the output end of the second telescopic cylinder 304 are respectively fixedly connected with the first fixed plate 305 and the second fixed plate 307, and the second telescopic cylinder 304 is used to drive the second fixed plate 307 to move vertically; guide rods 306 are fixedly connected to the four corners of the upper surface of the first fixed plate 305, and the guide rods 306 are slidably connected to the second fixed plate 307; a first telescopic cylinder 303 is fixedly provided at the bottom of the frame 1, and the output end of the first telescopic cylinder 303 is connected to the movable plate 301, and is used to drive the movable plate 301 to move horizontally.

[0046] Please refer again Figure 1 and Figure 2 As shown, two bearing seats 308 are fixedly arranged on the second fixed plate 307, and the bearing seats 308 are connected to the shaft rod 3; a driving motor 309 is fixedly arranged on the lower surface of the second fixed plate 307, and the driving motor 309 is mutually transmitted with the shaft rod 3 through a transmission member 310, so as to drive the shaft rod 3 to rotate; the transmission member 310 is composed of a synchronous pulley and a synchronous belt.

[0047] Please refer again Figure 2 , Figure 4 as well as Figure 6 As shown, a long rod 4 is provided through the center of the shaft 3, and the end of the long rod 4 extends to the inside of the pipe body 2; the long rod 4 is provided with a symmetrically arranged inner support plate 403 at a position corresponding to the inside of the pipe body 2, and the inner support plate 403 is an arc-shaped structure and has the same curvature as the inner wall of the pipe body 2; the end of the long rod 4 is provided with a first hinge rod 404 and a second hinge rod 405 at a position corresponding to the inner support plate 403, and the two ends of the first hinge rod 404 are rotatably connected to the long rod 4 and the inner support plate 403 respectively; a sliding groove 401 is also provided at the end of the long rod 4; a hinge block 406 is slidably provided in the sliding groove 401, and the two ends of the second hinge rod 405 are respectively connected to the hinge block 406 and the inner support plate 403.

[0048] Please refer again Figure 3 and Figure 6 As shown, an adjusting rod 402 is rotatably connected inside the long rod 4, the outer end of the adjusting rod 402 passes through the outer end of the long rod 4, and the inner end is connected to the hinge block 406, and the adjusting rod 402 and the long rod 4 can slide radially, and cannot rotate circumferentially with each other due to the action of the key; a third telescopic cylinder 409 is fixedly arranged on the upper surface of the second fixed plate 307, and a disc 408 is fixedly connected to the output end of the third telescopic cylinder 409; a circular connecting disk 407 is fixedly connected to the end of the adjusting rod 402 close to the disc 408, and the circular connecting disk 407 is rotatably connected to the disc 408, and the adjusting rod 402 can be dragged to slide inside the long rod 4.

[0049] Please refer again Figure 7 As shown, a plate frame 201 is fixedly arranged below the pipe body 2 through supporting legs, and the plate frame 201 presents a long plate structure; a uniformly distributed first U-shaped frame 203 and a second U-shaped frame 204 are respectively arranged above the plate frame 201, and the first U-shaped frame 203 and the second U-shaped frame 204 are staggered; the plate frame 201 is provided with guide grooves 202 at positions corresponding to the first U-shaped frame 203 and the second U-shaped frame 204, and the lower parts of the first U-shaped frame 203 and the second U-shaped frame 204 slide inside the corresponding guide grooves 202; a second roller 206 is rotatably connected to the middle of the upper part of the first U-shaped frame 203, and the second roller 206 presents a cylindrical structure that is thin in the middle and thick at both ends, and the curvature fits the pipe body 2, and the second roller 206 abuts against the pipe body 2; a first roller 205 is rotatably connected to the upper part of the second U-shaped frame 204 corresponding to the positions on both sides of the pipe body 2, and the first roller 205 abuts against the pipe body 2.

[0050] Please refer again Figure 7 As shown, a rotating shaft 209 is arranged inside the first U-shaped frame 203, and the position of the rotating shaft 209 is a fixed position; a second cam 208 is fixedly connected to the rotating shaft 209 at a position corresponding to the first U-shaped frame 203, and a first cam 207 is fixedly connected to the position corresponding to the second U-shaped frame 204, and the protrusions of the first cam 207 and the second cam 208 are arranged in reverse; a first servo motor 210 is fixedly arranged on the plate frame 201, and the output end of the first servo motor 210 is connected to the rotating shaft 209.

[0051] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below:

[0052] When the flange welding processing equipment provided by the present invention is used to weld the flange body 106 and the pipe body 2, the following steps are included:

[0053] S100: First, use the second telescopic cylinder 304 to lift up the second fixing plate 307, and use the second fixing plate 307 to support the shaft rod 3 on the upper part of the slide groove 103; then Figure 1 The flange body 106 is placed in the through groove 102 at the flange feeding position, and the flange body 106 slides into the slot 104 by its own gravity; finally, a pipe body 2 is placed on the second roller 206 by a crane, and the second roller 206 is used to support the pipe body 2, thereby completing the preparation process before welding.

[0054] S200: First, use the first telescopic cylinder 303 to drive the movable plate 301 away from the frame 1, so that the shaft rod 3 is pulled out from the inside of the slide groove 103, and then use the second telescopic cylinder 304 to drive the second fixed plate 307 to move downward, so that the shaft rod 3 is coaxial with the semicircular slot 104; use the first telescopic cylinder 303 again to drive the movable plate 301 to move, so that the shaft rod 3 is re-extended into the slide groove 103 and into the inside of the slot 104. At this time, since the flange body 106 is located here, the shaft rod 3 can string all the flange bodies 106, and then use the second telescopic cylinder 304 again to drive the shaft rod 3 to rise, so that the shaft rod 3 and the pipe body 2 can be coaxial again.

[0055] S300: The rotating shaft 209 is driven to rotate 180° by the first servo motor 210, so that the protrusion of the first cam 207 is downward and the protrusion of the second cam 208 is upward. At this time, all the second U-shaped frames 204 move downward and all the first U-shaped frames 203 move upward, so that the second roller 206 is in contact with the pipe body 2, allowing the pipe body 2 to move axially. Then, the second roller 206 is driven to rotate by a motor (not shown in the figure) to transport the pipe body 2 to the shaft 3, so that the port of the pipe body 2 is docked with the port of the shaft 3, and the automatic docking step is completed; then, the first servo motor 210 is used to rotate 180° again, so that the first roller 205 is in contact with the pipe body 2, allowing the pipe body 2 to rotate circumferentially.

[0056] S400: The second servo motor 504 drives the transmission shaft 503 to rotate, and the transmission shaft 503 drives the conveyor belt 501 to rotate. Since the conveyor belt 501 is provided with a cutout 502 with the same thickness as the flange body 106, when the conveyor belt 501 rotates, it can drive all the flange bodies 106 to move synchronously on the rotating shaft 209 in a step-by-step manner. It can be understood that under the action of the conveyor belt 501, all the flange bodies 106 will be sequentially sleeved on the ends of the coaxially arranged pipe body 2.

[0057] S500: The third telescopic cylinder 409 pushes the hinge block 406 to move toward one end of the pipe body 2 through the adjusting rod 402. At this time, since the second hinge rod 405 is rotatably connected to the hinge block 406, the second hinge rod 405 can drive the inner support plate 403 to expand outward, thereby realizing the inner support clamping of the pipe body 2; since the long rod 4 and the adjusting rod 402 cannot rotate circumferentially with each other under the action of the key, the long rod 4 and the shaft rod 3 are fixedly connected via a flange, so when the shaft rod 3 rotates, it can drive the pipe body 2 to rotate synchronously.

[0058] S600: The driving motor 309 drives the shaft 3 to rotate through the transmission member 310, and the shaft 3 drives the pipe body 2 to rotate when rotating. At this time, by fixing a welding machine at the connection between the pipe body 2 and the shaft 3, or manually holding a welding machine, the rotating pipe body 2 can be cooperated to realize the welding operation between the pipe body 2 and the flange body 106.

[0059] It is worth noting here that: since the welding machine will fix the pipe body 2 and the flange body 106 when working, when the pipe body 2 rotates, the flange body 106 will also rotate accordingly, thereby achieving full welding between the pipe body 2 and the flange body 106.

[0060] S700: After the welding of the flange and the pipe is completed, the second roller 206 is moved up again by the first servo motor 210, and the first roller 205 is lowered again. The flange body 106 and the pipe body 2 are separated from the shaft 3 by the second roller 206, and then they are transferred by a crane.

[0061] S800: Use the crane again to lift the pipe body 2 to which the flange body 106 is not welded onto the second roller 206, and then use the actively rotatable second roller 206 again to push the pipe body 2 toward the shaft 3 to complete the docking between the shaft 3 and the pipe body 2, and then replace the first roller 205 to support the pipe body 2, and then perform welding again.

[0062] S900: After all the flange bodies 106 temporarily stored on the shaft 3 are welded and used, all the above steps are repeated to start a new round of welding operation.

[0063] Among them, since the shaft rod 3 and the pipe body 2 are in contact with each other during welding, if the pipe body 2 rotates alone, friction will occur between the shaft rod 3, which may cause position offset and other effects, thereby causing inaccurate welding position between the pipe body 2 and the flange body 106. Therefore, the long rod 4 is connected to the shaft rod 3, and the long rod 4 and the adjusting rod 402 are mutually circumferentially transmitted. The adjusting rod 402 and the pipe body 2 are connected through the inner support plate 403, which can achieve synchronous rotation between the shaft rod 3, the pipe body 2 and the flange body 106, thereby improving the flange welding effect.

[0064] By temporarily storing multiple flange bodies 106 inside the frame 1 at one time and cooperating with a crane to achieve rapid loading, it saves time and effort, is convenient and efficient, and then uses the alternating cooperation of the first roller 205 and the second roller 206 to achieve automatic calibration of the pipe body 2, improve the flange welding accuracy, and achieve better welding effect. In conjunction with the second fixed plate 307 that can move vertically and horizontally, automatic loading of the flange body 106 can be achieved, which greatly reduces the labor intensity of the staff, improves the working efficiency, and adapts to production needs.

[0065] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0066] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A flange welding process, characterized in that: The following steps are involved: S100: firstly, the shaft (3) is positioned at the top of the slide groove (103), then the flange body (106) is placed in the slot (104), and finally the pipe body (2) is placed on the second roller (206), thereby completing the pre-welding preparation process; S200: Using the first telescopic cylinder (303) to control the horizontal movement of the shaft (3), using the second telescopic cylinder (304) to control the vertical movement of the shaft (3), using the shaft (3) to move the flange body (106) inside the slot (104) to the upper part of the slide groove (103) so that it is coaxial with the pipe body (2), thereby completing the initial loading process of the flange; S300: The first servo motor (210) cooperates with the rotating shaft (209) to control the directions of the first cam (207) and the second cam (208), thereby controlling the heights of the first U-shaped frame (203) and the second U-shaped frame (204), and then cooperates with the first roller (205) and the second roller (206) to allow the pipe body (2) to first only move in the axial direction and then only rotate in the circumferential direction, thereby completing the feeding process of the pipe body (2); S400: The second servo motor (504) drives the conveyor belt (501) to rotate through the transmission shaft (503), and the conveyor belt (501) drives all the flange bodies (106) on the rotating shaft (209) to move synchronously and step by step through the cutout (502), thereby completing the final loading process of the flange bodies (106); S500: The adjusting rod (402) pushes the hinge block (406) to move toward one end of the pipe body (2), driving the inner support plate (403) to expand outward, thereby achieving inner support clamping of the pipe body (2), and using the shaft rod (3) to drive the pipe body (2) to rotate synchronously, and cooperating with the welding machine to achieve welding between the pipe body (2) and the flange body (106); S600: allowing the pipe body (2) to move only in the axial direction, thereby completing the blanking process of the pipe body (2); S700: Using a crane to hoist the pipe body (2) to which the flange body (106) is not welded, onto the second roller (206), firstly using the actively rotatable second roller (206) to push the pipe body (2) toward the shaft (3), and then repeating steps S200 to S700, the welding process of the flange bodies (106) in all the slots (104) can be completed in sequence; S800: After all the flange bodies (106) temporarily stored on the shaft (3) have been welded and used, all the above steps are repeated to start a new round of welding operations.

2. A flange welding process according to claim 1, characterized in that: In the step S200, the first telescopic cylinder (303) is first used to drive the movable plate (301) away from the frame (1), so that the shaft (3) is pulled out from the inside of the slide groove (103), and then the second telescopic cylinder (304) is used to drive the second fixed plate (307) to move downward, so that the shaft (3) is coaxial with the semicircular slot (104); the first telescopic cylinder (303) is used again to drive the movable plate (301) to move, so that the shaft (3) is re-extended into the slide groove (103), and then extended into the inside of the slot (104) to string all the flange bodies (106), and then the second telescopic cylinder (304) is used again to drive the shaft (3) to rise, so that the shaft (3) and the pipe body (2) are coaxial again.

3. The flange welding process according to claim 1, characterized in that: In step S300, the first servo motor (210) is used to move the protruding portion of the first cam (207) downward and the protruding portion of the second cam (208) upward, thereby causing all the second U-shaped frames (204) to move downward and all the first U-shaped frames (203) to move upward, thereby causing the second roller (206) to come into contact with the pipe body (2), allowing the pipe body (2) to move only axially; Then, the first servo motor (210) is used to rotate 180° again, so that the first roller (205) comes into contact with the pipe body (2), allowing the pipe body (2) to rotate only in the circumferential direction.

4. A flange welding process according to claim 3, characterized in that: The second roller (206) can be driven by a motor to rotate so as to convey the pipe body (2) toward the shaft (3), so that the end of the pipe body (2) and the end of the shaft (3) can be butted against each other.

5. The flange welding process according to claim 1, characterized in that: In step S400, the second servo motor (504) drives the transmission shaft (503) to rotate, and the transmission shaft (503) drives the conveyor belt (501) to rotate. Through the cutout (502) with the same thickness as the flange body (106) opened on the conveyor belt (501), when the conveyor belt (501) rotates, all the flange bodies (106) are driven to move synchronously on the rotating shaft (209) in a step-by-step manner.

6. The flange welding process according to claim 1, characterized in that: In step S500, the third telescopic cylinder (409) pushes the hinge block (406) to move toward one end of the pipe body (2) via the adjusting rod (402), and the adjusting rod (402) uses the hinge block (406) to push the second hinge rod (405), so that the inner support plate (403) is expanded outward to internally support and clamp the pipe body (2).

7. A flange welding process according to claim 6, characterized in that: The long rod (4) and the adjusting rod (402) cannot rotate relative to each other in the circumferential direction due to the action of a key, and the long rod (4) and the shaft rod (3) are fixedly connected via a flange, so that when the shaft rod (3) rotates, the pipe body (2) is driven to rotate synchronously.

8. The flange welding process according to claim 1, characterized in that: In the step S500, the driving motor (309) drives the shaft (3) to rotate through the transmission member (310), and the shaft (3) drives the pipe body (2) to rotate when rotating; At the same time, a welding machine is used in conjunction with the rotating pipe body (2) to complete the welding operation between the pipe body (2) and the flange body (106).

9. The flange welding process according to claim 1, characterized in that: In the step S100, the flange body (106) is placed into the corresponding through slot (102) at the flange loading position, and the flange body (106) automatically slides into the slot (104) by its own gravity.

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