Positioning mechanism for flange machining

Abstract

The utility model discloses a positioning mechanism for flange processing, which comprises a support plate, a welding head is arranged in the support plate, a fixing claw is arranged below the welding head, a fixing device is arranged on one side of the fixing claw close to the welding head, and the fixing device comprises a first upright post, a sleeve, a first spring, a roller, a second upright post and a connecting post. The first stand column is fixedly connected to the bottom of the inner wall of the supporting plate. According to the positioning mechanism for flange machining, through cooperation of the first stand column, the sleeve, the first spring, the second stand column and the connecting column, the effect that when the positioning mechanism for flange machining is used for a long pipeline, the second stand column drives the connecting column to abut against the pipeline and a flange is achieved; the positioning device for flange machining solves the problems that when an existing positioning device for flange machining is used for a long pipeline, the tail end of the pipeline vibrates, then welding forming is poor when the flange and the pipeline are welded, and the reliability of connection between the flange and the pipeline is reduced.

Description

Technical Field

[0001] This utility model relates to the field of flange processing technology, specifically a positioning mechanism for flange processing. Background Technology

[0002] Pipelines are frequently used in engineering installation and equipment manufacturing. The connection between each section of pipeline is usually made by flanges. Before the pipeline is used, flanges need to be welded and installed at both ends of the pipeline. Positioning auxiliary mechanisms are needed when welding the flanges to the pipeline.

[0003] Existing flange processing positioning devices generally use a centering mechanism to center the inner diameter of the flange, thereby fixing and positioning the flange.

[0004] However, when existing flange processing positioning devices are used for longer pipelines, the ends of the pipelines become unstable and vibrate due to their length. This leads to poor weld formation and welding defects when welding the flange and the pipeline, thereby reducing the reliability of the flange and pipeline connection. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a positioning mechanism for flange processing. This mechanism solves the problem that when existing flange processing positioning devices are used with long pipelines, the ends of the pipelines become unstable and vibrate, leading to poor weld formation and welding defects during flange and pipeline welding, thus reducing the reliability of the flange and pipeline connection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning mechanism for flange processing, comprising a support plate, a housing fixedly connected to one side of the top of the support plate, a welding head disposed below the housing, a fixing claw disposed below the welding head, and a fixing device disposed on the side of the fixing claw near the welding head. The fixing device comprises a first column, a sleeve, a first spring, a roller, a second column, a connector, and a cone. The first column is fixedly connected to the top of the support plate, a sleeve is fitted onto the outer wall of the first column, a first spring is installed between the top of the first column and the bottom of the inner wall of the sleeve, a roller is rotatably connected to the top of the outer wall of the sleeve via a pin, a second column is slidably engaged with the inner wall of the support plate on the side of the first column away from the fixing claw, a connecting column is rotatably connected to the top inner wall of the second column via a bearing, and a cone is fixedly connected to the side of the connecting column away from the second column.

[0007] Preferably, a limiting device is provided on the side of the connecting column near the fixing claw. The limiting device includes an insert rod, a limiting rod, a slider, and a bolt. The cone is fixedly connected to the side of the connecting column near the fixing claw. The inner wall of the cone is slidably engaged with sliders on both the upper and lower sides. The side of the slider away from the connecting column is fixedly connected to the limiting rod. The side of the limiting rod away from the insert rod is provided with a bolt. The bolt is threadedly connected to the inner wall of the slider, and the end of the bolt abuts against the surface groove of the cone.

[0008] Preferably, a first motor is fixedly connected to the side of the connecting column away from the cone, and the output end of the first motor is fixedly connected to the outer wall of the connecting column away from the cone. A first hydraulic cylinder is fixedly connected to the inner wall of the outer casing away from the fixing claw below the first motor, and the output end of the first hydraulic cylinder is fixedly connected to the side of the second column away from the cone.

[0009] Preferably, a fixed seat is fixedly connected to the top of the support plate on the side away from the first hydraulic cylinder, and a second hydraulic cylinder is fixedly connected to the top of the fixed seat on the side close to the first hydraulic cylinder. The output end of the second hydraulic cylinder is rotatably connected to a connecting rod via a pin, and the other end of the connecting rod is rotatably connected to the side of the fixed claw close to the fixed seat via a pin. A support column is slidably engaged with the outer wall of the fixed claw, and the bottom of the support column is fixedly connected to the top of the fixed seat on the side close to the fixed claw.

[0010] Preferably, a second motor is fixedly connected to the top of the outer wall of the housing away from the fixing claw. The output end of the second motor passes through the outer wall away from the fixing claw via a bearing and is fixedly connected to a threaded rod. The other end of the threaded rod is rotatably connected to the outer wall away from the second motor via a bearing. A threaded block is threadedly connected to the outer wall of the threaded rod. The top of the threaded block is slidably engaged with the top inner wall of the support plate, and the bottom of the threaded block is fixedly connected to the top of the welding head. Beneficial effects

[0011] This utility model provides a positioning mechanism for flange processing. It has the following advantages: This flange processing positioning mechanism, through the cooperation of a first column, sleeve, first spring, roller, second column, connecting column, and cone, achieves the effect that when the flange processing positioning device is used for long pipelines, the first spring drives the roller to support the middle section of the pipeline, and the second column drives the connecting column to clamp the pipeline and flange together. This solves the problem that existing flange processing positioning devices, when used for long pipelines, cause the end of the pipeline to vibrate and become unstable, leading to poor weld formation and welding defects during flange and pipeline welding, thus reducing the reliability of the flange and pipeline connection.

[0012] By coordinating the insertion rod, the limiting rod, the slider, and the bolts, the cone drives the insertion rod to insert into the pipe when the positioning device for flange processing is tightened against the pipe, and the limiting rod limits the pipe to prevent the end of the pipe from being squeezed and deformed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 An exterior schematic diagram;

[0015] Figure 3 for Figure 1 A schematic diagram of the structure of the fixed base, the second hydraulic cylinder, and the connecting rod;

[0016] Figure 4 for Figure 1 A structural schematic diagram of the central support plate, the first column, and the sleeve;

[0017] Figure 5 for Figure 1 Schematic diagram of the structure at point A;

[0018] Figure 6 for Figure 5 A schematic diagram of the structure of the slider, housing, and bolts.

[0019] In the diagram: 1. Support plate; 2. Welding head; 3. Fixing claw; 4. Connecting column; 5. First column; 6. Sleeve; 7. First spring; 8. Roller; 9. Second column; 10. Cone; 11. Insert rod; 12. Limiting rod; 13. Slider; 14. Housing; 15. Bolt; 16. First motor; 17. First hydraulic cylinder; 18. Fixing seat; 19. Second hydraulic cylinder; 20. Connecting rod; 21. Support column; 22. Threaded rod; 23. Threaded block; 24. Second motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] When existing flange processing positioning devices are used for long pipelines, the ends of the pipelines become unstable and vibrate due to their length. This leads to poor weld formation and welding defects when welding the flange and the pipeline, thereby reducing the reliability of the flange-pipe connection.

[0022] In view of this, the present invention provides a positioning mechanism for flange processing. This positioning mechanism, through the cooperation of a first column, a sleeve, a first spring, a roller, a second column, and a connecting column, achieves the effect that when the flange processing positioning device is used for a long pipeline, the first spring drives the roller to support the middle section of the pipeline, and the second column drives the connecting column to clamp the pipeline and the flange. This solves the problem that when the existing flange processing positioning device is used for a long pipeline, the end of the pipeline will vibrate and become unstable, which leads to poor welding formation and welding defects during the welding of the flange and the pipeline, thereby reducing the reliability of the flange and pipeline connection.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0024] Example 1, by Figure 1-6As can be seen, the flange processing positioning mechanism in this case includes a support plate 1, which provides stable support for the outer shell 14. The support plate 1 can be made of materials such as concrete or steel to ensure the stability and load-bearing capacity of the entire structure. The outer shell 14 is fixedly connected to the top side of the support plate 1. The outer shell 14 supports the internal structure and provides safety protection for the operator to prevent accidents during the operation of the flange processing positioning mechanism. The outer shell 14 can be made of cast iron to ensure the stability and accuracy of the device. A welding head 2 is provided below the outer shell 14. 2. Welding is performed on the flange. A fixing claw 3 is provided below the welding head 2 to position the flange. A fixing device is provided on the side of the fixing claw 3 near the welding head 2. The fixing device includes a first column 5, a sleeve 6, a first spring 7, a roller 8, a second column 9, a connecting column 4, and a cone 10. The first column 5 is fixedly connected to the top of the support plate 1. The sleeve 6 is sleeved on the outer wall of the first column 5. The outer wall of the sleeve 6 has a threaded hole, and a screw is threaded into the inner wall of the threaded hole. The first column 5 supports the sleeve 6. A first spring 7 is installed between the top of the first column 5 and the bottom of the inner wall of the sleeve 6. Spring 7, the first spring 7 is made of carbon spring steel, and its elastic coefficient is selected according to actual needs to meet the working requirements. Rollers 8 are rotatably connected to the top of the outer wall of sleeve 6 via pins. There are two rollers 8, which are respectively fixedly connected to the front and back of the bottom of the support plate 1. Rollers 8 convert sliding friction into rolling friction, supporting the pipe and preventing vibration in the middle section of the pipe due to welding. A second column 9 is slidably engaged with the inner wall of the support plate 1 on the side of the first column 5 away from the fixing claw 3. A connecting column 4 is rotatably connected to the top inner wall of the second column 9 via a bearing. A cone 10 is fixedly connected to the side of the connecting column 4 away from the second column 9. The second column 9 moves in the limiting groove at the bottom of the support plate 1. When welding is required on the flange and the pipe, the operator first places the pipe on top of the two rollers 8 and supports the pipe by hand to ensure its balance. The first spring 7 is compressed and undergoes elastic deformation. The cone 10 supports the pipe and positions it. When the pipe is in the appropriate position, the operator rotates the screw to fix the sleeve 6. After that, the screw is rotated in the opposite direction, the first spring 7 rebounds, and the rollers 8 return to their initial position.

[0025] In the specific implementation process, it is worth noting that the support plate 1 is used to provide stable support for the outer shell 14. The support plate 1 can be made of materials such as concrete or steel structure to ensure the stability and load-bearing capacity of the entire structure. The welding head 2 consists of an electric telescopic rod and a welding head. When welding is required between the flange and the pipe, the welding head is moved above the welding point of the flange and the pipe by the electric telescopic rod, and the welding head welds the welding point of the flange and the pipe. The cone 10 is conical. The conical shape can effectively distribute the force when positioning the pipe and insert it into the pipe. The support plate 1 A housing 14 is fixedly connected to the top side of the flange processing positioning mechanism. The housing 14 supports the internal structure and provides safety protection for the operator, preventing accidents during operation. The housing 14 can be made of cast iron to ensure the stability and accuracy of the device. The welding head 2 welds the flange. There are two fixing claws 3. Several balls are equally spaced on the opposite sides of the two fixing claws 3. The rolling of the balls achieves the effect of the flange inner wall rotating on the inner wall of the fixing claws 3. The fixing claws 3 move in the opposite direction until the two fixing claws 3 are in contact. The flange is positioned on its inner wall. The cooperation between the second column 9 and the connecting column 4 provides stable support and fixation for the end of the pipe during welding. The cooperation between the first column 5, sleeve 6, first spring 7, and roller 8 supports the middle section of the pipe, preventing vibrations during welding. The rotation of roller 8 reduces friction between the pipe and roller 8, effectively preventing pipe misalignment due to excessive friction during welding. When it is necessary to adjust the flange and pipe... During welding, the worker first places the pipe on top of the two rollers 8 and supports the pipe by hand. The first spring 7 is compressed and undergoes elastic deformation. The connecting column 4 supports the pipe. When the pipe is in the appropriate position, the second column 9 drives the cone 10 to move. The cone 10 moves towards the fixing claw 3, pressing the pipe and flange together. At this time, the worker releases his hand from the pipe and rotates the screw to fix the sleeve 6. After that, the screw is rotated in the opposite direction, the first spring 7 rebounds, and the rollers 8 return to their initial position, thus supporting the pipe.

[0026] Furthermore, a limiting device is provided on the side of the connecting column 4 near the fixing claw 3. The limiting device includes an insert rod 11, a limiting rod 12, a slider 13, and a bolt 15. The insert rod 11 is fixedly connected to the side of the cone 10 away from the connecting column 4. The limiting rod 12 limits the pipe. The slider 13 is fixedly connected to the side of the limiting rod 12 near the connecting column 4. The slider 13 moves in the groove on the inner wall of the cone 10. The slider 13 is slidably engaged with both the upper and lower sides of the inner wall of the cone 10. A knob is fixedly connected to the side of the bolt 15 extending to the outside of the limiting rod 12. The bolt 15 is rotated by the knob. The slider 13 is fixedly connected to the limit rod 12 on the side away from the connecting column 4. The limit rod 12 is provided with a bolt 15 on the side away from the insertion rod 11. The bolt 15 is threaded to the inner wall of the slider 13, and the end of the bolt 15 is pressed against the surface groove of the cone 10. When welding the flange and the pipe, the worker first rotates the bolt 15, and the bolt 15 leaves the inner wall of the cone 10. Then the end of the pipe is inserted into the insertion rod 11 and fits against the outer wall of the cone 10. The pipe drives the limit rod 12 to move.

[0027] In the specific implementation process, it is worth noting that the cooperation of the connecting column 4, cone 10, insert rod 11, limiting rod 12, and slider 13 achieves the fixation of the pipe end, effectively preventing the pipe from shifting or falling off due to excessive length and vibration at the end, thus ensuring the stability of the pipe during the welding process. Three limiting rods 12 are evenly spaced and distributed on the outer wall of the cone 10 near the fixing claw 3. The limiting rods 12 are made of hard alloy, which has extremely high hardness, effectively preventing deformation caused by external forces. This effectively avoids pipe shifting or falling off during welding due to deformation of the limiting rods 12. When dealing with pipes of different diameters, the limiting rods 12 limit the pipe, and the slider 13 moves in the groove on the inner wall of the cone 10, achieving... To facilitate quick fixing and limiting of pipes of different diameters, a knob is fixedly connected to one side of the bolt 15 extending to the outside of the limiting rod 12. The knob drives the bolt 15 to rotate, so that the slider 13 can be fixed when needed. When welding the flange and the pipe, the operator first rotates the bolt 15 until it leaves the inner wall of the cone 10, and then inserts the inner diameter of the pipe end into the insertion rod 11. The second column 9 drives the cone 10 to move closer to the pipe until the outer wall of the cone 10 is in contact with the end of the pipe. At this time, the sides of the three limiting rods 12 that are close to each other are in contact with the outer wall of the pipe. The friction generated by the multi-point contact restricts the radial and circumferential displacement of the pipe, thereby fixing the pipe. The operator fixes the pipe by using the bolt 15 and the limiting rod 12, thus achieving the limitation of the pipe.

[0028] Furthermore, a first motor 16 is fixedly connected to the side of the connecting column 4 away from the cone 10. The output end of the first motor 16 is fixedly connected to the outer wall of the connecting column 4 away from the cone 10. The model of the first motor 16 is selected according to actual needs, as long as it meets the working requirements. First, the first motor 16 is connected to an external power supply. Below the first motor 16, a first hydraulic cylinder 17 is fixedly connected to the inner wall of the outer casing 14 away from the fixing claw 3. The output end of the first hydraulic cylinder 17 is fixedly connected to the side of the second column 9 away from the cone 10. The first hydraulic cylinder 17 drives the second column 9 to move, the first motor 16 drives the connecting column 4, the connecting column 4 drives the cone 10 to rotate, and thus drives the pipe to rotate.

[0029] In the specific implementation process, it is worth noting that, through the cooperation between the first motor 16, the connecting column 4, the cone 10, and the fixing claw 3, when welding the pipe and the flange, the first motor 16 is first connected to an external power source. The first motor 16 drives the connecting column 4 to rotate, the connecting column 4 drives the cone 10 to rotate, and then drives the pipe to rotate. The pipe drives the flange to rotate on the outer wall of the fixing claw 3 by friction. Through the cooperation between the first hydraulic cylinder 17 and the second column 9, when it is necessary to drive the cone 10 to position the pipe, the first hydraulic cylinder 17 drives the second column 9 to move, and the second column 9 drives the cone 10 to move, thus achieving the driving of the connecting column 4.

[0030] Specifically, during the welding of the flange and the pipe, the worker first places the pipe on top of the two rollers 8 and supports it by hand. The first spring 7 is compressed and undergoes elastic deformation, and the connecting column 4 supports the pipe. Once the pipe is in the appropriate position, the first hydraulic cylinder 17 moves the second column 9, which in turn drives the cone 10 to move closer to the fixing claw 3, bringing the pipe and flange together. At this point, the worker releases their hand from the pipe and rotates the screw to fix the sleeve 6. The sleeve 6 then drives the rollers 8 to support the pipe. The process is now complete. Then, the screw is rotated in the opposite direction, the first spring 7 rebounds, driving the roller 8 back to its initial position. The first motor 16 drives the connecting column 4 to rotate, the connecting column 4 drives the cone 10 to rotate, and thus drives the pipe to rotate. The pipe drives the flange to rotate on the outer wall of the fixing claw 3 by friction. The welding head 2 welds the flange and the pipe. After completion, the first hydraulic cylinder 17 drives the cone 10 back to its initial position. The worker takes out the welded flange and rotates the screw in the opposite direction, the first spring 7 rebounds, driving the roller 8 back to its initial position, and the first motor 16 is turned off.

[0031] Example 2, by Figure 1-6It is known that a fixed seat 18 is fixedly connected to the top of the support plate 1 on the side away from the first hydraulic cylinder 17. A second hydraulic cylinder 19 is fixedly connected to the top of the fixed seat 18 on the side close to the first hydraulic cylinder 17. The output end of the second hydraulic cylinder 19 is rotatably connected to a connecting rod 20 via a pin. The other end of the connecting rod 20 is rotatably connected to the fixed claw 3 on the side close to the fixed seat 18 via a pin. A support column 21 is slidably engaged with the outer wall of the fixed claw 3. The support column 21 supports the fixed claw 3. The bottom of the support column 21 is fixedly connected to the top of the fixed seat 18 on the side close to the fixed claw 3. When it is necessary to position the flange, the inner wall of the flange is first fitted onto the two fixed claws 3. The second hydraulic cylinder 19 drives the connecting rod 20 to move. The connecting rod 20 drives the fixed claw 3 to move in the limiting groove in the inner wall of the support column 21. The fixed claw 3 positions the flange and fixes the fixed claw 3. After completion, the second hydraulic cylinder 19 drives the fixed claw 3 back to the initial position and closes the second hydraulic cylinder 19.

[0032] In the specific implementation process, it is worth noting that the overall material of the fixed seat 18 can be cast iron or alloy material to ensure the load-bearing capacity of the fixed seat 18 and ensure that the fixed seat 18 provides stable support for the second hydraulic cylinder 19. Through the cooperation of the fixed seat 18, the second hydraulic cylinder 19, the connecting rod 20, the support column 21 and the fixed claw 3, the precise positioning of the flange is achieved, effectively preventing deviations between the flange and the pipeline during welding and avoiding the problem of unstable flange and pipeline structure. The support column 21 supports the fixed claw 3. When the flange needs to be positioned, the inner wall of the flange is first fitted onto the two fixed claws 3. The second hydraulic cylinder 19 drives the connecting rod 20 to move, thereby driving the two fixed claws 3 to move away from each other until the two fixed claws 3 are both in contact with the inner wall of the flange, thus positioning and fixing the flange. After completion, the second hydraulic cylinder 19 drives the fixed claws 3 back to the initial position and closes the second hydraulic cylinder 19, thus achieving the positioning of the flange.

[0033] Furthermore, a second motor 24 is fixedly connected to the top of the outer wall of the outer casing 14 on the side away from the fixed claw 3. The model of the second motor 24 is selected according to actual needs, as long as it meets the working requirements. The output end of the second motor 24 passes through the outer casing 14 on the side away from the fixed claw 3 through a bearing and is fixedly connected to a threaded rod 22. The second motor 24 drives the threaded rod 22 to rotate. The other end of the threaded rod 22 is rotatably connected to the outer casing 14 on the side away from the second motor 24 through a bearing. A threaded block 23 is threadedly connected to the outer wall of the threaded rod 22. The threaded rod 22 drives the threaded block 23 to move. The top of the threaded block 23 is slidably engaged with the top inner wall of the support plate 1. The bottom of the threaded block 23 is fixedly connected to the top of the welding head 2. The welding head 2 welds the connection between the flange and the pipe. The threaded block 23 drives the welding head 2 to move.

[0034] In the specific implementation process, it is worth noting that the model of the second motor 24 is selected according to actual needs, as long as it meets the working requirements. First, the second motor 24 is connected to an external power supply. Through the cooperation between the second motor 24, the threaded rod 22, and the threaded block 23, when the welding head 2 needs to be moved, the second motor 24 drives the threaded rod 22 to rotate in the inner wall of the support plate 1, and the threaded rod 22 drives the threaded block 23 to move. When the position of the welding head 2 needs to be moved, the threaded block 23 drives the welding head 2 to move above the connection between the flange and the pipe, and the telescopic rod drives the welding head 2 to descend, so that the welding head can weld the flange and the pipe where welding is required.

[0035] Specifically, when the flange needs to be positioned, the inner wall of the flange is first fitted onto the two fixing claws 3. The second hydraulic cylinder 19 drives the connecting rod 20 to move, which in turn drives the two fixing claws 3 to move away from each other until both fixing claws 3 are in contact with the inner wall of the flange, thus positioning and fixing the flange. After completion, the second hydraulic cylinder 19 drives the fixing claws 3 back to the initial position and closes the second hydraulic cylinder 19. The second motor 24 drives the threaded rod 22 to rotate in the inner wall of the support plate 1. The threaded rod 22 drives the threaded block 23 to move, and the threaded block 23 drives the welding head 2 to move. The welding head 2 welds the connection between the flange and the pipe.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning mechanism for flange processing, comprising a support plate (1), characterized in that: A housing (14) is fixedly connected to the top side of the support plate (1). A welding head (2) is provided below the housing (14). A fixing claw (3) is provided below the welding head (2). A fixing device is provided on the side of the fixing claw (3) near the welding head (2). The fixing device includes a first column (5), a sleeve (6), a first spring (7), a roller (8), a second column (9), a connecting column (4), and a cone (10); The first column (5) is fixedly connected to the top of the support plate (1). A sleeve (6) is fitted on the outer wall of the first column (5). A first spring (7) is installed between the top of the first column (5) and the bottom of the inner wall of the sleeve (6). A roller (8) is rotatably connected to the top of the outer wall of the sleeve (6) through a pin. A second column (9) is provided on the side of the first column (5) away from the fixed claw (3) and is slidably engaged with the inner wall of the support plate (1). A connecting column (4) is rotatably connected to the top inner wall of the second column (9) through a bearing. A cone (10) is fixedly connected to the side of the connecting column (4) away from the second column (9).

2. The positioning mechanism for flange processing according to claim 1, characterized in that: A limit device is provided on the side of the connecting column (4) near the fixing claw (3); The limiting device includes a plug (11), a limiting rod (12), a slider (13), and a bolt (15); The insertion rod (11) is fixedly connected to the side of the cone (10) away from the connecting column (4). The inner wall of the cone (10) is slidably engaged with the slider (13) on both the upper and lower sides. The side of the slider (13) away from the connecting column (4) is fixedly connected with the limiting rod (12). The side of the limiting rod (12) away from the insertion rod (11) is provided with a bolt (15). The bolt (15) is threadedly connected to the inner wall of the slider (13), and the end of the bolt (15) abuts against the surface groove of the cone (10).

3. The positioning mechanism for flange processing according to claim 2, characterized in that: A first motor (16) is fixedly connected to the side of the connecting column (4) away from the cone (10). The output end of the first motor (16) is fixedly connected to the side of the outer wall of the connecting column (4) away from the cone (10). A first hydraulic cylinder (17) is fixedly connected to the side of the inner wall of the outer shell (14) away from the fixing claw (3) below the first motor (16). The output end of the first hydraulic cylinder (17) is fixedly connected to the side of the second column (9) away from the cone (10).

4. The positioning mechanism for flange processing according to claim 3, characterized in that: A fixed seat (18) is fixedly connected to the top of the support plate (1) away from the first hydraulic cylinder (17). A second hydraulic cylinder (19) is fixedly connected to the top of the fixed seat (18) near the first hydraulic cylinder (17). The output end of the second hydraulic cylinder (19) is rotatably connected to a connecting rod (20) via a pin. The other end of the connecting rod (20) is rotatably connected to the fixed claw (3) near the fixed seat (18) via a pin. A support column (21) is slidably engaged on the outer wall of the fixed claw (3). The bottom of the support column (21) is fixedly connected to the top of the fixed seat (18) near the fixed claw (3).

5. A positioning mechanism for flange processing according to claim 1, characterized in that: A second motor (24) is fixedly connected to the top of the outer wall of the outer shell (14) away from the fixed claw (3). The output end of the second motor (24) passes through the outer shell (14) away from the fixed claw (3) through a bearing and is fixedly connected to a threaded rod (22). The other end of the threaded rod (22) is rotatably connected to the outer shell (14) away from the second motor (24) through a bearing. A threaded block (23) is threadedly connected to the outer wall of the threaded rod (22). The top of the threaded block (23) is slidably engaged with the top inner wall of the support plate (1). The bottom of the threaded block (23) is fixedly connected to the top of the welding head (2).

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