A welding apparatus for threaded extruder maintenance steel

Abstract

This invention relates to a welding device for steel parts used in the maintenance of a threaded extruder, comprising a base with a long arc rail and a short arc rail mounted on it. The long arc rail is fixedly connected to the base, and the short arc rail is connected to the base via a base plate. The base plate is bolted to the base. An arc-shaped sleeve is slidably connected to the long arc rail, and a welding structure is provided in the middle of the arc-shaped sleeve. The device utilizes a locking frame for expansion; a protective gas supply assembly can be installed on the locking frame to supply protective gas for the welding process. Separating the protective gas supply structure from the welding head reduces the weight of the welding head and removes the structural size limitations of the protective gas supply structure. Water can be supplied through a gas supply pipe to rinse the area to be welded.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment, specifically a welding device for steel parts used in the maintenance of threaded extruders. Background Technology

[0002] Extruder screws, augers, and other components require frequent repairs due to high wear. However, welding processes require preheating (300-400℃) and multi-layer welding (up to 8mm), which traditional equipment struggles to meet the requirements of ring welding. Manual positioning easily leads to weld misalignment, and the welding environment demands strict standards. Single / twin-screw extruders: Twin-screw extruders offer superior mixing, but cannot achieve ring motion during welding repairs; single-screw extruders have a simple structure but poor functional expandability. Conventional welding machines rely on linear tracks, which cannot adapt to ring-shaped workpieces; integrated shielding gas structures increase weld head inertia, affecting precision control; and the lack of integrated lubrication and flushing design leads to frequent equipment maintenance. Therefore, a welding device for steel parts used in the maintenance of threaded extruders is proposed. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] Given the following technical problems in existing technologies: Welding challenges for large annular workpieces: Large annular workpieces (up to 200mm in diameter), including extruder screws and augers, require 360° welding repair, but traditional equipment cannot achieve continuous circular motion, resulting in welding blind spots; Limited welding torch posture adjustment: The welding process requires dynamic adjustment of the welding torch height, horizontal position, and pitch angle, while traditional equipment relies on manual operation, resulting in low precision and efficiency; Conflict between shielding gas supply and welding head load: Directly integrating the shielding gas supply structure (such as gas pipes and nozzles) into the welding head increases weight, affects movement flexibility, and is limited by space constraints; Insufficient adaptability to complex working conditions: The welding process needs to simultaneously handle shielding gas supply, cooling flushing, and lubrication maintenance functions, which are difficult to integrate into the welding head using traditional equipment.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a welding device for steel parts for maintenance of a threaded extruder, comprising a base, wherein a long arc rail and a short arc rail are provided on the base, wherein the long arc rail is fixedly connected to the base, and the short arc rail is connected to the base through a base plate, the base plate is connected to the base by bolts, and an arc sleeve is slidably connected on the long arc rail, wherein a welding structure is provided in the middle of the arc sleeve;

[0006] The arc-shaped sleeve is also provided with an extension component, and a circular pit is opened in the middle of the base, in which a tooling circular plate is installed.

[0007] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the bottom of the long arc rail is provided with several closely arranged arc-shaped limiting platforms, and the bottom of the short arc rail is also provided with an arc-shaped limiting platform. The cross-section of the arc-shaped limiting platform is trapezoidal, and the interior of the arc-shaped sleeve is provided with a mating groove. The long arc rail is L-shaped and extends into the mating groove. The bottom of the mating groove is provided with a sinking groove, and the arc-shaped limiting platform extends into the sinking groove. The arc-shaped limiting platform and the sinking groove are movably connected. The bottom of the sinking groove is rotatably connected to a second roller, and the outer ring of the second roller is movably connected to the arc-shaped limiting platform.

[0008] The combination of the sinking groove and the arc-shaped limiting platform ensures that the arc-shaped sleeve will not fall off the long and short arc rails.

[0009] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the inner top wall of the mating groove is rotatably connected with several rollers, and the bottom of the rollers is movably connected to the upper side of the long arc rail.

[0010] The arc-shaped sleeve is supported on the long arc-shaped rail by rollers.

[0011] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, an installation platform is provided on one side of the arc-shaped sleeve, and a drive cylinder is rotatably connected inside the installation platform. Two friction rings are provided on the drive cylinder, and the outer ring of the friction ring is movably connected to the outer side of the long arc rail. A second servo motor is provided on the arc-shaped sleeve, and the power output end of the second servo motor is connected to the drive cylinder.

[0012] The servo motor controls the rotation of the drive cylinder, causing the arc-shaped sleeve to move on the long arc track.

[0013] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the extension component includes a locking frame, a constraint frame, and a clamping mechanism. Two constraint frames are provided at one end of the locking frame. The constraint frame and the locking frame are L-shaped, and the locking frame and the constraint frame are U-shaped. A clamping mechanism is provided on the locking frame.

[0014] The clamping mechanism includes a locking bolt, a threaded platform, a movable groove, a pressure block, a clamping seat, and a friction block. Several friction blocks are provided on one side of the clamping seat. The friction blocks are movably connected to the arc-shaped sleeve. The clamping seat and the pressure block are connected by a connecting cloth strip. The arc-shaped sleeve is provided with a threaded platform, and the threaded platform is threadedly connected to the locking bolt. The locking frame is provided with a movable groove, and the pressure block is movably connected in the movable groove. The pressure block movably abuts against one end of the locking bolt.

[0015] Rotate the locking bolt to press and squeeze the pressure block, so that the arc-shaped compression seat presses against the folding spring plate. The folding spring plate deforms and squeezes the clamping seat and friction block close to and against the arc-shaped sleeve, so that the friction block and the arc-shaped sleeve maintain frictional connection, thereby locking the locking frame and the arc-shaped sleeve.

[0016] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the clamping mechanism further includes an arc-shaped extrusion seat and a folding spring plate. The pressure block is provided with an arc-shaped extrusion seat, one side of which is an elliptical surface. Several folding spring plates are rotatably connected to the clamping seat. The folding spring plates are folded into two sides, one side of which is half the length of the other side. The shorter side of the folding spring plate corresponds to and movably abuts against the elliptical surface of the arc-shaped extrusion seat, while the longer side of the folding spring plate is rotatably connected to the clamping seat.

[0017] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the clamping mechanism also includes a limiting ring and limiting blocks. Several limiting blocks are provided on the outer ring of the clamping block, and a limiting ring is provided on the inner side of the movable groove. The limiting ring and the limiting blocks are in movable contact.

[0018] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the extension component is equipped with a protective gas supply component. The protective gas supply component includes a fixed platform, a flexible metal tube, a rigid tube, and a gas supply pipe. The locking frame is equipped with a fixed platform, the fixed platform is equipped with a rigid tube, the end of the rigid tube away from the fixed platform is equipped with a flexible metal tube, the flexible metal tube is equipped with a nozzle, and the rigid tube is equipped with a gas supply pipe.

[0019] The gas supply pipe delivers protective gas to the nozzle through a rigid pipe and a flexible metal pipe.

[0020] As a preferred technical solution for welding equipment for steel parts used in the maintenance of a threaded extruder, the welding structure includes a support plate in the middle of an arc-shaped sleeve, a frustum on the support plate, a servo motor three on the frustum, a rotary table fixedly connected to the power output end of the servo motor three, a motor mounting bracket on the rotary table, the motor mounting bracket being vertically arranged, a servo motor four on the motor mounting bracket, a pitch adjustment table connected to the power output end of the servo motor four, a connecting arm three on the pitch adjustment table, a servo motor one on the connecting arm three, a connecting arm one connected to the power output end of the servo motor one, a connecting arm two rotatably connected to the connecting arm one, and a welding head on the connecting arm two;

[0021] Servo motor six controls the rotation of the rotating frame and connecting arm two via a long shaft to adjust the orientation and posture of the welding head in order to complete the welding work;

[0022] Servo motor one controls the swing of connecting arm one, servo motor four controls the swing of pitch adjustment table, thereby controlling the pitch swing of connecting arm three, so that the welding head is close to or far from the center of the tooling circular plate, while controlling the height and horizontal position of the welding head.

[0023] The beneficial effects of the welding equipment for the maintenance of steel parts for a threaded extruder according to the present invention are as follows: by utilizing the expandable function of the locking frame, a protective gas supply component can be set on the locking frame to supply protective gas to protect the welding process. The protective gas supply structure can be separated from the welding head, reducing the weight of the welding head. At the same time, the structural size limitation of the protective gas supply structure is also removed. Water can be supplied through the gas supply pipe to rinse the welding part.

[0024] This equipment, through a circular track system, modular expansion components, and multi-degree-of-freedom welding torch control, solves the problems of continuity, precision, and functional integration in welding large circular workpieces, significantly improving the repair efficiency and quality of core extruder components (such as screws and augers). Its design directly addresses the industry's urgent need for automated, highly adaptable welding equipment.

[0025] By using a complementary design of long and short arc tracks, combined with a friction ring drive structure, the welding head can move continuously 360° along the circular track.

[0026] The servo motor drives the friction ring to roll along the track, ensuring the smooth movement of the arc-shaped sleeve.

[0027] Modular functionality expansion: The locking frame allows for quick installation of the protective gas assembly (fixed platform and flexible metal tube), separating the gas supply system from the welding head, reducing load and overcoming size limitations.

[0028] The air supply pipe also has a water flushing function, which can clean residual impurities in the welding area.

[0029] High-precision welding torch control: Four degrees of freedom adjustment: Servo motor one controls horizontal swing, servo motor four controls pitch, servo motor six controls welding head rotation, and long shaft drives the rotating frame to fine-tune the angle.

[0030] The rotating frame has a built-in lubricant cavity and annular oil-absorbing cotton to reduce mechanical wear.

[0031] Reliable locking and friction reduction design: The folding spring plate is triggered by the arc-shaped compression seat to deform, pushing the friction block to fit tightly against the arc-shaped sleeve, thus achieving rapid fixation between the locking frame and the main body.

[0032] Roller 1 and Roller 2 are fitted with the trapezoidal cross section of the arc-shaped limiting platform to reduce track sliding resistance. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0034] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a top view of the structure of the present invention;

[0036] Figure 3 This is a schematic diagram showing the connection relationship between the extended component and the locking frame of the present invention;

[0037] Figure 4 This is a schematic diagram showing the positional relationship between the arc-shaped sleeve and the short arc rail of the present invention;

[0038] Figure 5 For the present invention Figure 2 A magnified schematic diagram of part A in the middle section;

[0039] Figure 6 For the present invention Figure 3 A partially enlarged structural diagram of section B;

[0040] Figure 7 This is a schematic diagram of the connection structure between the rigid tube and the flexible metal tube of the present invention;

[0041] Figure 8 This is a schematic diagram showing the positional relationship between the long arc rail and the arc sleeve of the present invention.

[0042] Reference numerals: 1. Base; 2. Base plate; 3. Circular pit; 4. Tooling circular plate; 5. Short arc rail; 6. Long arc rail; 7. Locking frame; 8. Fixing platform; 9. Flexible metal tube; 10. Rigid tube; 11. Air supply pipe; 12. Connecting arm one; 13. Connecting arm two; 14. Arc-shaped sleeve; 15. Servo motor one; 16. Support plate; 17. Connecting arm three; 18. Mating groove; 19. Roller one; 20. Roller two; 21. Arc-shaped limiting platform; 22. Servo motor two; 23. Drive 24. Cylinder; 25. Friction ring; 26. Constraint frame; 27. Locking bolt; 28. Structural shell; 29. ​​Rotating frame; 30. Long shaft; 31. Clamping seat; 32. Limiting ring; 33. Pressure block; 34. Movable groove; 35. Friction block; 36. Connecting strip; 37. Folding spring plate; 38. Threaded platform; 39. Welding head; 40. Frustum; 41. Rotary platform; 42. Motor mounting bracket; 43. Pitch adjustment platform; 44. Arc-shaped extrusion seat; 45. Limiting block; 46. Annular oil-absorbing cotton. Detailed Implementation

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0046] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0047] like Figures 1-8 As shown, the present invention proposes a welding device for steel parts for maintenance of a threaded extruder, including a base 1, on which a long arc rail 6 and a short arc rail 5 are provided. The long arc rail 6 is fixedly connected to the base 1, and the short arc rail 5 is connected to the base 1 through a base plate 2. The base plate 2 is connected to the base 1 by bolts. An arc-shaped sleeve 14 is slidably connected on the long arc rail 6, and a welding structure is provided in the middle of the arc-shaped sleeve 14.

[0048] An extension component is also provided on the arc-shaped sleeve 14, and a circular pit 3 is provided in the middle of the base 1, and a tooling circular plate 4 is installed in the circular pit 3.

[0049] The bottom of the long arc rail 6 is provided with several closely arranged arc-shaped limiting platforms 21, and the bottom of the short arc rail 5 is also provided with arc-shaped limiting platforms 21. The cross-section of the arc-shaped limiting platform 21 is trapezoidal. The arc-shaped sleeve 14 has a mating groove 18 inside. The long arc rail 6 is L-shaped and extends into the mating groove 18. The bottom of the mating groove 18 has a sinking groove. The arc-shaped limiting platform 21 extends into the sinking groove. The arc-shaped limiting platform 21 is movably connected to the sinking groove. The bottom of the sinking groove is rotatably connected to the roller 20. The outer ring of the roller 20 is movably connected to the arc-shaped limiting platform 21.

[0050] The cooperation between the sinking groove and the arc-shaped limiting platform 21 ensures that the arc-shaped sleeve 14 will not fall off on the long arc rail 6 and the short arc rail 5.

[0051] The inner top wall of the mating groove 18 is rotatably connected to several rollers 19, and the bottom of the rollers 19 is movably connected to the upper side of the long arc rail 6.

[0052] The arc-shaped sleeve 14 is supported on the long arc rail 6 by roller 19.

[0053] A mounting platform is provided on one side of the arc-shaped sleeve 14. A drive cylinder 23 is rotatably connected inside the mounting platform. Two friction rings 24 are provided on the drive cylinder 23. The outer ring of the friction rings 24 is movably connected to the outer side of the long arc rail 6. A servo motor 22 is provided on the arc-shaped sleeve 14. The power output end of the servo motor 22 is connected to the drive cylinder 23.

[0054] Servo motor 22 controls the rotation of drive cylinder 23, causing arc sleeve 14 to move on long arc rail 6.

[0055] The expansion assembly includes a locking frame 7, a constraint frame 25, and a pressing mechanism. Two constraint frames 25 are provided at one end of the locking frame 7. The constraint frames 25 and the locking frame 7 are L-shaped, and the locking frame 7 and the constraint frames 25 form a U-shape. The locking frame 7 is provided with a pressing mechanism.

[0056] The clamping mechanism includes a locking bolt 26, a threaded platform 37, a movable groove 33, a pressure block 32, a clamping seat 30, and a friction block 34. Several friction blocks 34 are provided on one side of the clamping seat 30. The friction blocks 34 are movably connected to the arc-shaped sleeve 14. The clamping seat 30 and the pressure block 32 are connected by a connecting cloth strip 35. The arc-shaped sleeve 14 is provided with a threaded platform 37, and the threaded platform 37 is threadedly connected to the locking bolt 26. The locking frame 7 is provided with a movable groove 33, and the pressure block 32 is movably connected in the movable groove 33. The pressure block 32 is movably abutted against one end of the locking bolt 26.

[0057] Rotate the locking bolt 26 to press and squeeze the pressure block 32, so that the arc-shaped compression seat 43 presses the folding spring plate 36. The folding spring plate 36 deforms and squeezes the clamping seat 30 and the friction block 34 to be close to and pressed against the arc-shaped sleeve 14, so that the friction block 34 and the arc-shaped sleeve 14 maintain frictional connection, so that the locking frame 7 and the arc-shaped sleeve 14 are locked.

[0058] The clamping mechanism also includes an arc-shaped pressing seat 43 and a folding spring plate 36. The pressing block 32 is provided with an arc-shaped pressing seat 43, one side of which is an elliptical surface. Several folding spring plates 36 are rotatably connected to the clamping seat 30. The folding spring plate 36 is folded into two sides, one side of which is half the length of the other side. The shorter side of the folding spring plate 36 corresponds to and movably abuts against the elliptical surface of the arc-shaped pressing seat 43, and the longer side of the folding spring plate 36 is rotatably connected to the clamping seat 30.

[0059] The clamping mechanism also includes a limiting ring 31 and a limiting block 44. Several limiting blocks 44 are provided on the outer ring of the pressing block 32, and a limiting ring 31 is provided on the inner side of the movable groove 33. The limiting ring 31 and the limiting block 44 are in active contact.

[0060] The expansion component is equipped with a protective gas supply component, which includes a fixed platform 8, a flexible metal tube 9, a rigid tube 10, and a gas supply tube 11. The locking frame 7 is equipped with a fixed platform 8, and the fixed platform 8 is equipped with a rigid tube 10. The end of the rigid tube 10 away from the fixed platform 8 is equipped with a flexible metal tube 9, and the flexible metal tube 9 is equipped with a nozzle. The rigid tube 10 is equipped with a gas supply tube 11.

[0061] The air supply pipe 11 provides protective gas to the nozzle through the rigid pipe 10 and the flexible metal pipe 9.

[0062] The inner diameter of the limiting ring 31 is larger than the diameter of the pressure block 32.

[0063] The welding structure includes a support plate 16 in the middle of the arc sleeve 14, a frustum 39 on the support plate 16, a servo motor 3 on the frustum 39, a rotary table 40 fixedly connected to the power output end of the servo motor 3, a motor mounting bracket 41 on the rotary table 40, the motor mounting bracket 41 is vertically arranged, a servo motor 4 on the motor mounting bracket 41, a pitch adjustment table 42 connected to the power output end of the servo motor 4, a connecting arm 3 17 on the pitch adjustment table 42, a servo motor 15 on the connecting arm 3 17, a connecting arm 12 connected to the power output end of the servo motor 15, a connecting arm 2 13 rotatably connected to the connecting arm 12, and a welding head 38 on the connecting arm 2 13.

[0064] Servo motor six controls the rotation of rotating frame 28 and connecting arm 2 13 via long shaft 29 to adjust the orientation and posture of welding head 38 to complete the welding work;

[0065] Servo motor 15 controls the swing of connecting arm 12, and servo motor 4 controls the swing of pitch adjustment table 42, thereby controlling the pitch swing of connecting arm 37, so that welding head 38 approaches or moves away from the center of tooling circular plate 4, while controlling the height and horizontal position of welding head 38.

[0066] The long arc track 6 is three-quarters of a circle, and the arc sleeve 14 is one-half a circle.

[0067] The short arc rail 5 is located in the middle of the gap in the long arc rail 6.

[0068] Servo motor 22 controls the drive cylinder 23 to rotate. The drive cylinder 23 rotates the friction ring 24 and moves along the long arc rail 6, so that the arc sleeve 14 can move along the long arc rail 6, and the arc sleeve 14 can make a complete circular motion along the long arc rail 6 and the short arc rail 5.

[0069] Adjust the shape of the flexible metal tube 9 so that the nozzle on the flexible metal tube 9 is facing the welding part.

[0070] A servo motor 6 is mounted on connecting arm 12, and a long shaft 29 is connected to the power output end of the servo motor 6. The long shaft 29 is rotatably connected inside connecting arm 12. A rotating frame 28 is mounted on connecting arm 23, and a structural shell 27 is mounted on connecting arm 12. The rotating frame 28 cooperates with the structural shell 27. An annular groove is recessed on one side of the outer ring of the rotating frame 28, and an annular oil-absorbing cotton 45 is provided in the annular groove. Several drainage holes are opened on the other side of the outer ring of the rotating frame 28. The structural shell 27 is fitted on the outside of the rotating frame 28. The inner cavity of the rotating frame 28 is provided with a receiving cavity. The outer ring of the annular oil-absorbing cotton 45 is movably connected to the inner cavity of the structural shell 27. The receiving cavity stores lubricating fluid. The long shaft 29 is connected to the rotating frame 28.

[0071] The specific implementation method is as follows: Servo motor 22 controls the drive cylinder 23 to rotate. The drive cylinder 23 rotates with the friction ring 24 and moves along the long arc rail 6, so that the position of the welding head 38 is adjusted. The arc sleeve 14 can move along the long arc rail 6, so that the arc sleeve 14 can make a complete circular motion along the long arc rail 6 and the short arc rail 5. Rotating the locking bolt 26 causes the locking bolt 26 to press the pressure block 32 and the arc pressing seat 43 to move. The arc pressing seat 43 presses the folding spring plate 36 to deform. The elastic pressing clamping seat 30 and the friction block 34 of the folding spring plate 36 are in close contact with the outer side of the arc sleeve 14. The friction block 34 is in frictional connection with the arc sleeve 14, so that the arc sleeve 14 is locked relative to the locking frame 7. The locking frame 7 can be used to expand the function. A protective gas supply component is set on the locking frame 7 to supply protective gas to protect the welding process.

[0072] Servo motor six controls the rotation of rotating frame 28 and connecting arm 2 13 via long shaft 29 to adjust the orientation and posture of welding head 38 to complete the welding work;

[0073] Servo motor 15 controls the swing of connecting arm 12, and servo motor 4 controls the swing of pitch adjustment table 42, thereby controlling the pitch swing of connecting arm 37, so that welding head 38 approaches or moves away from the center of tooling circular plate 4, while controlling the height and horizontal position of welding head 38.

[0074] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding device for steel parts used in the maintenance of a threaded extruder, characterized in that: Includes a base (1), on which a long arc rail (6) and a short arc rail (5) are provided. The long arc rail (6) is fixedly connected to the base (1), and the short arc rail (5) is connected to the base (1) through a base plate (2). The base plate (2) is connected to the base (1) by bolts. An arc sleeve (14) is slidably connected on the long arc rail (6), and a welded structure is provided in the middle of the arc sleeve (14). An extension component is also provided on the arc sleeve (14). A circular pit (3) is provided in the middle of the base (1), and a tooling circular plate (4) is installed in the circular pit (3). Several closely arranged arc-shaped limiting platforms (21) are provided at the bottom of the long arc rail (6), and an arc-shaped limiting platform (21) is also provided at the bottom of the short arc rail (5). The cross-section of the arc-shaped limiting platform (21) is trapezoidal. A mating groove (18) is provided inside the arc sleeve (14). The long arc rail (6) is L-shaped and extends into the mating groove (18). A sinking groove is provided at the bottom of the mating groove (18), and the arc-shaped limiting platform (21) extends into the sinking groove. The arc-shaped limiting platform (21) is movably connected to the sinking trough, and the bottom of the sinking trough is rotatably connected to the roller two (20). The outer ring of the roller two (20) is movably connected to the arc-shaped limiting platform (21). The expansion assembly includes a locking frame (7), a constraint frame (25), and a pressing mechanism. One end of the locking frame (7) is provided with two constraint frames (25). The constraint frames (25) and the locking frame (7) are L-shaped, and the locking frame (7) and the constraint frames (25) form a U-shape. The locking frame (7) is provided with a pressing mechanism. The pressing mechanism includes a locking bolt (26), a threaded platform (37), and a movable groove (3). 3) Pressure block (32), clamping seat (30) and friction block (34). Several friction blocks (34) are provided on one side of the clamping seat (30). The friction blocks (34) are movably connected to the arc sleeve (14). The clamping seat (30) and the pressure block (32) are connected by a connecting cloth strip (35). The arc sleeve (14) is provided with a threaded platform (37). The threaded platform (37) is threadedly connected to a locking bolt (26). The locking frame (7) is provided with a movable groove (33). The pressure block (32) is movably connected in the movable groove (33). One end of the pressure block (32) is movably connected to the locking bolt (26). The clamping mechanism also includes an arc-shaped pressing seat (43) and a folding spring plate (36). The pressing block (32) is provided with an arc-shaped pressing seat (43). One side of the arc-shaped pressing seat (43) is an elliptical surface. Several folding spring plates (36) are rotatably connected to the clamping seat (30). The folding spring plate (36) is folded into two sides. One side of the folding spring plate (36) is half the length of the other side. The shorter side of the folding spring plate (36) corresponds to and movably abuts against the elliptical surface of the arc-shaped pressing seat (43). The longer side of the folding spring plate (36) is rotatably connected to the clamping seat (30).

2. The welding equipment for steel parts used in the maintenance of a threaded extruder according to claim 1, characterized in that: The inner top wall of the mating groove (18) is rotatably connected to several rollers (19), and the bottom of the rollers (19) is movably connected to the upper side of the long arc rail (6).

3. The welding equipment for steel parts used in the maintenance of a threaded extruder according to claim 1, characterized in that: A mounting platform is provided on one side of the arc sleeve (14), and a drive cylinder (23) is rotatably connected inside the mounting platform. Two friction rings (24) are provided on the drive cylinder (23). The outer ring of the friction ring (24) is movably connected to the outer side of the long arc rail (6). A servo motor (22) is provided on the arc sleeve (14), and the power output end of the servo motor (22) is connected to the drive cylinder (23).

4. The welding equipment for steel parts used in the maintenance of a threaded extruder according to claim 1, characterized in that: The clamping mechanism also includes a limiting ring (31) and a limiting block (44). The outer ring of the pressing block (32) is provided with several limiting blocks (44), and the inner side of the movable groove (33) is provided with a limiting ring (31). The limiting ring (31) and the limiting block (44) are in active contact.

5. The welding equipment for steel parts used in the maintenance of a threaded extruder according to claim 1, characterized in that: The expansion component is equipped with a protective gas supply component, which includes a fixed platform (8), a flexible metal tube (9), a rigid tube (10), and a gas supply pipe (11). The locking frame (7) is equipped with a fixed platform (8), and the fixed platform (8) is equipped with a rigid tube (10). The end of the rigid tube (10) away from the fixed platform (8) is equipped with a flexible metal tube (9), and the flexible metal tube (9) is equipped with a nozzle. The rigid tube (10) is equipped with a gas supply pipe (11).

6. The welding equipment for steel parts used in the maintenance of a threaded extruder according to claim 1, characterized in that: The welding structure includes a support plate (16) in the middle of the arc sleeve (14), a frustum (39) on the support plate (16), a servo motor three on the frustum (39), a rotary table (40) fixedly connected to the power output end of the servo motor three, a motor mounting bracket (41) on the rotary table (40), the motor mounting bracket (41) is vertically arranged, a servo motor four on the motor mounting bracket (41), a pitch adjustment table (42) connected to the power output end of the servo motor four, a connecting arm three (17) on the pitch adjustment table (42), a servo motor one (15) on the connecting arm three (17), a connecting arm one (12) connected to the power output end of the servo motor one (15), a connecting arm two (13) rotatably connected to the connecting arm one (12), and a welding head (38) on the connecting arm two (13).

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