Flexible system and process for uninterrupted continuous welding of bent arch line of tunnel steel arch

Abstract

The invention relates to the technical field of continuous welding of steel arch profiles, in particular to a flexible system and process for uninterrupted continuous welding of a tunnel steel arch bent arch line, the flexible system comprises a positioning and clamping assembly, the positioning and clamping assembly at least comprises two positioning bases, and sliding mechanisms are arranged on the positioning bases; the device further comprises a side pressing mechanism and a top pressing mechanism. The welding assembly comprises a welding gun, the welding gun is arranged on a robot mechanism, and the robot mechanism is connected with a power source and a control cabinet; the welding assembly further comprises a welding wire blending mechanism. The walking assembly comprises a ground rail mechanism and a tackle mechanism, and the tackle mechanism is used for bearing the positioning and clamping assembly and the welding assembly and moves along the ground rail mechanism. Through automatic operation of a flexible system, the automation degree of continuous welding operation is improved, the reliability of the continuous welding process is also improved, continuous welding is connected with subsequent cold bending treatment, the matching degree of the whole treatment process is improved, vacancy of equipment is reduced, and the overall efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of continuous welding of steel arch frame profiles, and in particular to a flexible system and process for uninterrupted continuous welding of curved arch lines of tunnel steel arch frames. Background Art

[0002] With the rapid development of my country's infrastructure, tunnel and underground cavern construction projects are increasing. Steel arches, as key support structural materials in these projects, require efficient and precise production and processing to ensure project progress and quality. The intelligent steel arch bending production line has emerged to automate and intelligentize steel arch production, improving production efficiency and product quality.

[0003] The current intelligent steel arch bending production line has certain limitations in its production process. From the profile loading stage to the profile welding during the arch bending process, the profile loading and bending operations must be completed after the welding process. This inter-process waiting makes it impossible to achieve continuous production throughout the tunnel steel arch bending line.

[0004] Specifically, nearly half of the production time on existing intelligent steel arch bending production lines is wasted on waiting times between various processes. This intermittent production model severely restricts productivity, unable to meet the rapid supply demands of large-scale construction projects, and becomes a bottleneck restricting the efficient operation of the entire production process.

[0005] After in-depth analysis, the existing technology mainly has the following problems: 1. Poor process connection: There is a lack of effective coordination mechanism between the various processes. Once the welding process is delayed or fails, the front-end loading and back-end bending processes can only wait passively, and the production rhythm cannot be flexibly adjusted. The continuity of the entire production line is seriously damaged.

[0006] 2. Low production efficiency: A large amount of time is consumed in waiting for the process, which greatly shortens the effective operating time of the equipment. The time actually available for production and processing per unit time is limited, which directly affects the output quantity of steel arch frames and makes it difficult to meet the urgent needs of engineering projects.

[0007] 3. Low resource utilization: During the waiting process, equipment, manpower and other resources are idle and cannot be fully utilized, resulting in waste of resources and increased production costs.

[0008] Clearly, the current process for continuous welding of tunnel steel arch bending lines still needs to be improved. Optimization is needed to ensure that the intelligent steel arch bending production line can achieve continuous and efficient production, break the waiting bottleneck between processes, and achieve efficient coordination of all processes. Therefore, a more reasonable technical solution is needed to address the technical problems existing in the existing technology. Summary of the Invention

[0009] In order to overcome at least one of the defects mentioned above, the present invention proposes a flexible system and process for uninterrupted welding of tunnel steel arch frame bending lines, aiming to optimize the production process, improve production efficiency, and ensure that the intelligent steel arch frame bending production line can achieve continuous and efficient production operations.

[0010] In order to achieve the above objectives, the flexible system disclosed in the present invention can adopt the following technical solutions: A flexible system for continuous welding of tunnel steel arch bending lines, comprising: The positioning and clamping assembly is used to position and fix the continued welding profile; the positioning and clamping assembly includes at least two positioning bases, on which a sliding mechanism for sliding the continued welding profile is provided, and also includes a side clamping mechanism for clamping the continued welding profile from the side, and a top clamping mechanism for clamping the continued welding profile from the top; The welding assembly is relatively distributed on both sides of the continuous welding profile and is used to weld from both sides of the continuous welding profile; the welding assembly includes a welding gun for welding the continuous welding profile, the welding gun is set on a robot mechanism and is adjusted and moved, and the robot mechanism is connected to a power supply and a control cabinet; the welding assembly also includes a welding wire dispensing mechanism for delivering welding wire to the continuous welding position; The walking assembly comprises a ground rail mechanism and a pulley mechanism. The pulley mechanism is used for carrying the positioning clamping assembly and the welding assembly and is displaced along the ground rail mechanism.

[0011] Furthermore, the side and top clamping assemblies are used to secure the profile to be welded, thereby achieving alignment and subsequent welding of the profile. While their structures are not strictly limited, an optimization is provided herein, and one feasible option is proposed: the side and top clamping assemblies include adaptive clamping rods, each with a clamping head at its front end, which is used to contact and clamp the profile to be welded. When this solution is adopted, the adaptive clamping rod drives the clamping head to move back and forth, allowing the clamping head to compress and secure the profile to be welded, thereby achieving alignment welding.

[0012] Further, the sliding mechanism is used to adjust the sliding of the continuous welding profile as required, so as to improve the welding precision, and the structure is not uniquely limited, and one of the feasible options is optimized and proposed herein: the sliding mechanism comprises a bottom sliding roller for supporting and driving the continuous welding profile, and a side sliding roller for assisting the positioning of the continuous welding profile. When the above scheme is adopted, the bottom sliding roller and the side sliding roller jointly provide support and positioning, and guide the continuous welding profile to move in a predetermined direction, so that the continuous welding profile reciprocally displaces in a straight line for position adjustment.

[0013] Further, in order to monitor the position of the continuous welding profile and improve the positioning precision, a variety of schemes can be adopted, and one of the feasible options is optimized and proposed herein: a sensor is further arranged on the positioning base, and the sensor is used to detect the position of the continuous welding profile at the positioning and clamping assembly. When the above scheme is adopted, the sensor comprises a distance sensor, which is used to detect the current distance value to determine whether the continuous welding profile reaches the specified position.

[0014] Further, the robot is used to drive the welding gun to move, so that the welding gun can reach the welding position and realize accurate welding, and the structure is not uniquely limited, and one of the feasible options is optimized and proposed herein: the robot comprises a robot base, and a control arm is arranged on the robot base, and the welding gun is connected to the control arm, and the control arm is used to drive the welding gun to move to the welding seam for welding. When the above scheme is adopted, the control arm can adopt a multi-axis mechanical arm to adjust the position in multiple dimensions.

[0015] Further, in the welding operation, it is necessary to deliver welding wire to the welding position, which is realized by a welding wire distribution mechanism, and the structure is not uniquely limited, and one of the feasible options is optimized and proposed herein: the welding wire distribution mechanism comprises a welding wire reel and a wire feeder, and the wire feeder is used to deliver the welding wire from the welding wire reel to the welding seam. When the above scheme is adopted, the welding wire is wound on the welding wire reel, and the wire feeder delivers the welding wire to the welding position for welding.

[0016] Further, the walking assembly is used as the main walking structure, and a variety of ways can be adopted to realize the walking of the upper mechanism, and the structure is not uniquely limited, and one of the feasible options is optimized and proposed herein: the ground rail mechanism comprises a plurality of rails, and the rails are connected and fixed by pre-buried parts arranged on the foundation, and the rails are further provided with blocking parts for blocking the trolley mechanism. When the above scheme is adopted, the pre-buried parts are directly embedded into the foundation surface and are used to connect and fix the rails, and the number of the rails is at least two, and the rails are used to support the trolley mechanism above, and the trolley mechanism moves along the extension direction of the rails to drive the positioning and clamping assembly and the welding assembly above to move synchronously.

[0017] Further, the trolley mechanism can be configured in various forms, which are not limited uniquely, and one feasible option is optimized and proposed here: the trolley mechanism comprises a frame, a driving wheel set and a driven wheel set arranged on the frame and matched with the track, and a driver arranged on the frame and matched with the driving wheel set through a clutch for transmission. When the above scheme is adopted, the driving wheel set is driven to rotate by the driver, and the driving wheel set and the driven wheel set of the frame travel along the track, so that the movement is realized.

[0018] The above disclosure relates to a flexible welding system, and the present application also discloses a continuous welding process.

[0019] A continuous welding process for a tunnel steel arch bending line, comprising: Before welding, the trolley mechanism walks to the specified position, the positioning and clamping assembly is in the open state, and the continuous welding profile is waited to reach the butt joint position; The first continuous welding profile enters the positioning and clamping assembly, the movement of the first continuous welding profile is detected by the sensor, the first continuous welding profile stops moving when it reaches the butt joint position, and is clamped by the positioning and clamping assembly; The second continuous welding profile enters the positioning and clamping assembly, the movement of the second continuous welding profile is detected by the sensor, the second continuous welding profile stops moving when it reaches the butt joint position, and is clamped by the positioning and clamping assembly, so that the butt joint of the two continuous welding profiles is realized; The welding operation is realized by the welding assembly, and the welding connection of the two continuous welding profiles is realized; After the welding operation is completed, the trolley mechanism walks and sends the two continuous welding profiles to the cold bending equipment for subsequent processing.

[0020] The continuous welding process disclosed above can reciprocally run to the specified position through the trolley mechanism, and the continuous welding profile is positioned and welded by the positioning and clamping assembly, and the displacement of the continuous welding profile can be synchronized during the processing, so that the two steps are synchronized, the efficiency of the welding processing is improved, and the synchronization is also completed after the welding is completed. The flexible system can immediately enter a new round of welding and conveying operation, and realizes the continuous welding operation of the flexible system.

[0021] Further, in order to ensure continuous operation, when the trolley mechanism sends the continuous welding profile to the cold bending equipment, the positioning and clamping assembly is released to clamp the continuous welding profile, so that the continuous welding profile enters the cold bending equipment; the trolley mechanism returns to the specified position again, and the welding process is repeated.

[0022] Compared with the prior art, some beneficial effects of the technical scheme of the present application include: The present invention realizes automatic positioning, welding and conveying of the continued welding profiles through the automated operation of the flexible system, thereby improving the automation level of the continued welding operation and the reliability of the continued welding process. At the same time, the continued welding is connected with the subsequent cold bending treatment, which can greatly improve the coordination of the entire processing flow, reduce the vacancy of equipment, and improve the efficiency of the entire processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is the truncated axonometric drawing of the flexible system.

[0025] Figure 2 This is a truncated side view of the flexible system.

[0026] Figure 3 This is the top view of the flexible system after truncation.

[0027] Figure 4 This is the front view of the flexible system.

[0028] Figure 5 It is a schematic diagram of the overall structure of the positioning and clamping components.

[0029] Figure 6 A side view of the positioning clamping assembly.

[0030] Figure 7 A top view of the positioning clamping assembly.

[0031] Figure 8 This is a front view of the positioning clamping assembly.

[0032] Figure 9 A side view of the welded assembly.

[0033] Figure 10 This is an overall schematic diagram of the welding assembly.

[0034] Figure 11 This is an overall schematic diagram of the welding component from another perspective.

[0035] Figure 12 It is a structural diagram of the pulley mechanism.

[0036] Figure 13 It is an overall schematic diagram of the pulley mechanism.

[0037] Figure 14 This is a schematic diagram of the ground rail mechanism after being truncated.

[0038] Figure 15 It is an overall schematic diagram of the ground rail mechanism and an enlarged schematic diagram of the local structure.

[0039] In the above drawings, the meanings of the symbols are: 1. Positioning and clamping assembly; 101. Side clamping assembly; 102. Top clamping assembly; 103. Side sliding roller; 104. Bottom sliding roller; 105. Positioning base; 2. Welding assembly; 201. Control arm; 202. Welding gun; 203. Wire feeder; 204. Wire reel; 205. Robot base; 3. Pulley mechanism; 301. Driving wheel group; 302. Driven wheel group; 4. Ground rail mechanism; 401. Rail; 402. Embedded parts; 403. Blocking parts; 5. Continued welding profile; 6. Sensor; 7. Control cabinet; 8. Power supply; 9. Clamping head; 10. Clutch; 11. Drive. DETAILED DESCRIPTION

[0040] This embodiment will be further explained below with reference to the accompanying drawings and specific examples.

[0041] In view of the low efficiency of the welding operation of the bending line of the tunnel steel arch frame in the prior art, the unclear connection between multiple equipment and the existence of many idle periods, which leads to low efficiency of the overall processing operation, the following embodiments are optimized and overcome the defects in the prior art.

[0042] Example 1 like Figures 1 to 15 As shown, this embodiment provides a flexible system for uninterrupted welding of the bending line of a tunnel steel arch frame, comprising: like Figure 1 、 Figure 2 、 Figures 5 to 8 As shown, the positioning clamping assembly 1 is used to position and fix the continued welding profile 5; the positioning clamping assembly 1 includes at least two positioning bases 105, and the positioning bases 105 are provided with a sliding mechanism for sliding the continued welding profile 5, and also include a side pressing mechanism for pressing the continued welding profile 5 from the side, and a top pressing mechanism for pressing the continued welding profile 5 from the top; like Figure 3 、 Figure 4 、 Figures 9 to 11 As shown, the welding assembly 2 is relatively distributed on both sides of the continuous welding profile 5, and is used to weld from both sides of the continuous welding profile 5; the welding assembly 2 includes a welding gun 202 for welding the continuous welding profile 5, and the welding gun 202 is set on a robot mechanism and is adjusted and moved. The robot mechanism is connected to a power supply 8 and a control cabinet 7; the welding assembly 2 also includes a welding wire dispensing mechanism for delivering welding wire to the continuous welding position; like Figures 12 to 15 As shown, the traveling assembly includes a ground rail mechanism 4 and a pulley mechanism 3 . The pulley mechanism 3 is used to carry the positioning and clamping assembly 1 and the welding assembly 2 and to shift along the ground rail mechanism 4 .

[0043] The side clamping assembly 101 and the top clamping assembly are used to fix the continued welding profile 5, thereby achieving alignment and subsequent welding of the profile. Their structure is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the side clamping assembly 101 and the top clamping assembly 102 include an adaptive clamping rod, and the front end of the adaptive clamping rod is provided with a clamping head 9, which is used to contact and clamp the continued welding profile 5. When adopting the above solution, the adaptive clamping rod drives the clamping head 9 to move back and forth, so that the clamping head 9 can compress and fix the continued welding profile 5, thereby achieving alignment welding.

[0044] Preferably, in this embodiment, the adaptive pressing rod includes a lateral pressing rod and a longitudinal pressing rod.

[0045] The sliding mechanism is used to make the continued welding profile 5 slide and adjust as needed to improve the welding accuracy. Its structure is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: Figures 5 to 8 As shown, the sliding mechanism includes a bottom sliding roller 104 for supporting and driving the continued welding profile 5, and also includes a side sliding roller 103 for assisting in positioning the continued welding profile 5. When adopting the above solution, the bottom sliding roller 104 and the side sliding roller 103 jointly provide support and limit, guiding the continued welding profile 5 to move in a predetermined direction, thereby allowing the continued welding profile 5 to move back and forth in a straight line for position adjustment.

[0046] To monitor the position of the continued weld profile 5 and improve positioning accuracy, various solutions are available. This embodiment optimizes and adopts one feasible option: a sensor 6 is further provided on the positioning base 105 to detect the position of the continued weld profile 5 at the positioning clamping assembly 1. When this solution is adopted, the sensor 6 includes a distance sensor 6 to detect the current distance value in a directional manner to determine whether the continued weld profile 5 has reached the specified position.

[0047] The robot is used to drive the welding gun 202 to move so that the welding gun 202 can reach the welding position and achieve precise welding. Its structure is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: Figures 9 to 11As shown, the robot includes a robot base 205, on which is mounted a control arm 201. The welding gun 202 is connected to the control arm 201, and the control arm 201 is used to move the welding gun 202 to the weld seam for welding. When adopting the above solution, the control arm 201 can be a multi-axis robotic arm, which can adjust its position in multiple dimensions.

[0048] During welding operation, it is necessary to deliver welding wire to the welding position, which is achieved by the welding wire allocation mechanism. Its structure is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: Figures 9 to 11 As shown, the welding wire preparation mechanism includes a welding wire reel 204 and a wire feeder 203. The welding wire at the welding wire reel 204 is fed to the welding seam by the wire feeder 203. When the above solution is adopted, the welding wire is wound on the welding wire reel 204, and the wire feeder 203 feeds the welding wire to the welding position to achieve welding.

[0049] The walking assembly is the main walking structure, and a variety of methods can be used to realize the walking of the upper mechanism. Its structure is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: Figure 14 、 Figure 15 As shown, the floor rail mechanism 4 includes a plurality of rails 401, which are connected and fixed by embedded parts 402 set in the foundation. The rails 401 are also provided with blocking parts 403 for blocking the pulley mechanism 3. When adopting the above solution, the embedded parts 402 are directly embedded in the foundation surface and are used to connect and fix the rails 401. There are at least two rails 401 and they are used to support the pulley mechanism 3 above. The pulley mechanism 3 moves along the extension direction of the rails 401, driving the positioning and clamping assembly 1 and welding assembly 2 above to move synchronously.

[0050] The pulley mechanism 3 can be constructed in various forms, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: Figure 13 As shown, the pulley mechanism 3 includes a frame, which is provided with a driving wheel set 301 and a driven wheel set 302 corresponding to the track 401. The frame is also provided with a driver 11, which cooperates with the driving wheel set 301 through a clutch 10. When adopting the above solution, the driving wheel set 301 is driven by the driver 11 to rotate and move along the track 401. The driving wheel set 301 and the driven wheel set 302 of the frame both move along the track 401, thereby achieving movement.

[0051] Preferably, in this embodiment, the flexible system further includes a solenoid valve assembly, which is used to control the start and stop operations of the positioning and clamping assembly 1, the welding assembly 2 and the traveling assembly.

[0052] Example 2 The content of the above embodiment 1 discloses a flexible welding system, and this embodiment also discloses an uninterrupted welding process.

[0053] A process for continuous welding of a tunnel steel arch bending line, comprising: Before welding, the pulley mechanism 3 moves to the designated position, so that the positioning clamping assembly 1 is in the open state, waiting for the welding profile 5 to reach the docking position; The first welded profile 5 is made to enter the positioning and clamping assembly 1. The movement of the first welded profile 5 is detected by the sensor 6. When the first welded profile 5 reaches the docking position, it stops moving and is clamped by the positioning and clamping assembly 1. The second welded profile 5 is made to enter the positioning and clamping assembly 1. The movement of the second welded profile 5 is detected by the sensor 6. When the second welded profile 5 reaches the docking position, it stops moving and is clamped by the positioning and clamping assembly 1, thereby achieving docking and fixing of the two welded profiles 5. Perform welding operation by welding assembly 2 to realize welding connection of two continuous welding profiles 5; After the welding operation is completed, the pulley mechanism 3 moves and sends the two continued-welding profiles 5 to the cold bending equipment for subsequent processing.

[0054] In this embodiment, when the pulley mechanism 3 sends the continued welding profile 5 to the cold bending equipment, the clamping of the positioning clamping assembly 1 on the continued welding profile 5 is released, allowing the continued welding profile 5 to enter the cold bending equipment; the pulley mechanism 3 returns to the specified position and repeats the welding process.

[0055] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various implementation methods based on the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the scope of protection of this embodiment. The scope of protection of this embodiment should be based on the definition in the claims.

Claims

1. A flexible system for continuous welding of tunnel steel arch bending lines, characterized in that: include: A positioning clamping assembly (1) is used to position and fix the continued welding profile (5); the positioning clamping assembly (1) includes at least two positioning bases (105), the positioning bases (105) are provided with a sliding mechanism for sliding the continued welding profile (5), and also includes a side pressing mechanism for pressing the continued welding profile (5) from the side, and a top pressing mechanism for pressing the continued welding profile (5) from the top; The welding assembly (2) is relatively distributed on both sides of the continuous welding profile (5) and is used for welding from both sides of the continuous welding profile (5); the welding assembly (2) includes a welding gun (202) for welding the continuous welding profile (5), the welding gun (202) is arranged on a robot mechanism and is adjusted and moved, and the robot mechanism is connected to a power supply (8) and a control cabinet (7); the welding assembly (2) also includes a welding wire dispensing mechanism for conveying welding wire to the continuous welding position; The walking assembly comprises a ground rail mechanism (4) and a pulley mechanism (3), wherein the pulley mechanism (3) is used to carry the positioning clamping assembly (1) and the welding assembly (2) and to shift along the ground rail mechanism (4).

2. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1 is characterized in that: The side pressing assembly (101) and the top pressing assembly (102) include an adaptive pressing rod, and a pressing head (9) is provided at the front end of the adaptive pressing rod. The pressing head (9) is used to contact and press the welding profile (5).

3. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1 is characterized in that: The sliding mechanism includes a bottom sliding roller (104) for supporting and driving the continued welding profile (5), and also includes a side sliding roller (103) for assisting in positioning the continued welding profile (5).

4. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1 is characterized in that: A sensor (6) is also provided on the positioning base (105), and the sensor (6) is used to detect the position of the continued welding profile (5) at the positioning clamping assembly (1).

5. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1 is characterized in that: The robot comprises a robot base (205), a control arm (201) is provided on the robot base (205), the welding gun (202) is connected to the control arm (201), and the control arm (201) is used to drive the welding gun (202) to move to the welding seam for welding.

6. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1, characterized in that: The welding wire dispensing mechanism comprises a welding wire reel (204) and a wire feeder (203), and the welding wire at the welding wire reel (204) is fed to the welding seam by the wire feeder (203).

7. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1, characterized in that: The ground rail mechanism (4) comprises a plurality of rails (401), the rails (401) being connected and fixed via embedded parts (402) arranged on the foundation, and a blocking part (403) for blocking the pulley mechanism (3) is also arranged on the rails (401).

8. The flexible system for continuous welding of tunnel steel arch bending lines according to claim 1, characterized in that: The pulley mechanism (3) includes a frame, on which a driving wheel group (301) and a driven wheel group (302) corresponding to the track (401) are provided. The frame is also provided with a driver (11), and the driver (11) is transmitted in cooperation with the driving wheel group (301) through a clutch (10).

9. A process for continuous welding of the curved line of a tunnel steel arch frame, characterized in that: include: Before welding, the pulley mechanism (3) moves to a designated position, so that the positioning clamping assembly (1) is in an open state, and waits for the welding profile (5) to reach the docking position; The first welded profile (5) is caused to enter the positioning clamping assembly (1), the movement of the first welded profile (5) is detected by the sensor (6), and the first welded profile (5) stops moving when it reaches the docking position and is clamped by the positioning clamping assembly (1); The second welded profile (5) is caused to enter the positioning clamping assembly (1), and the movement of the second welded profile (5) is detected by the sensor (6). When the second welded profile (5) reaches the docking position, it stops moving and is clamped by the positioning clamping assembly (1), thereby achieving docking and fixing of the two welded profiles (5); Performing welding operations through the welding assembly (2) to achieve welding connection of two continuous welding profiles (5); After the welding operation is completed, the pulley mechanism (3) moves and sends the two welded profiles (5) to the cold bending equipment for subsequent processing.

10. The uninterrupted welding process for the bending line of a tunnel steel arch according to claim 9, characterized in that: When the pulley mechanism (3) sends the continued welded profile (5) to the cold bending equipment, the clamping of the positioning clamping assembly (1) on the continued welded profile (5) is released, so that the continued welded profile (5) enters the cold bending equipment; the pulley mechanism (3) returns to the designated position and repeats the welding process.

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