A steel pipe pole circumferential weld welding tooling capable of assisting docking
Through the combination of designing the bracket and adjustment structure, the precise angle adjustment of the steel pipe joints is achieved, which solves the problem of inconvenient docking of existing tooling and improves the welding quality.
Patent Information
- Application Number
- CN202510133008.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2045-02-06
AI Technical Summary
The existing steel pipe rod ring joint welding tooling is inconvenient to fine-tune the angle of the steel pipe joint, resulting in a decrease in welding quality.
A steel pipe rod ring seam welding tool including bracket, adjustment structure, swing structure and fine-tuning structure is designed. Through the combination of electric push rod, thread sleeve and thread rod, precise fine-tuning of the vertical and horizontal angles of the steel pipe joints is achieved to ensure full contact.
The butt accuracy of steel pipe joints is improved, avoiding gaps in welds and improving welding quality.
Smart Images

Figure CN119734036B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of welding tooling, and particularly to a steel pipe pole circumferential seam welding tooling capable of assisting butt joint. Background Art
[0002] Steel pipe poles are widely used in fields such as electric power, communication, and transportation. Circumferential seam welding is an important link in the manufacturing process of steel pipe poles, and its quality directly affects the strength and stability of steel pipe poles. Therefore, a steel pipe pole circumferential seam welding tooling capable of assisting butt joint is used during welding;
[0003] For this reason, the patent with the authorization announcement number CN118218901A discloses a welding fixture for steel pipes, belonging to the technical field of welding fixtures. This welding fixture for steel pipes includes: a placement table, a double-headed lead screw, a first motor fixedly connected to the placement table, and a threaded sleeve threadedly connected to the double-headed lead screw. The output shaft of the first motor and the surface of the double-headed lead screw are fixedly connected with mutually meshing first bevel gears. It also includes a clamping mechanism and a clamping force adjusting mechanism, and the clamping mechanism is arranged on the threaded sleeve; in the present invention, the clamping mechanism uses multiple contact parts to simultaneously perform multi-point positioning inside the steel pipe, so that the steel pipe and the clamping mechanism are in a connected state. At the same time, under the action of the gravity of the steel pipe itself, the height can be automatically adjusted. The steel pipe can be stably placed on the supporting plate. Under the action of two installation rings and the supporting plate at the same horizontal height, the two steel pipes to be welded are adjusted to the state of being concentric and without deviation, reducing the difficulty of butt joint of the steel pipes and improving the accuracy of their butt joint;
[0004] The above-mentioned welding fixture for steel pipes adjusts the two steel pipes to the state of being concentric and without deviation through the clamping mechanism, but it is inconvenient to finely adjust the angle of the butt joint of the steel pipes. During use, due to the influence of the length of the steel pipe pole, there will be partial gaps at the contact surface of the butt joints of the two steel pipe poles during butt joint, resulting in incomplete contact of the two butt joints. The gap after welding will directly affect the welding quality, making its applicability low during use. Summary of the Invention
[0005] The purpose of the present invention is to provide a steel pipe pole circumferential seam welding tooling capable of assisting butt joint to solve the defect that the existing steel pipe pole circumferential seam welding tooling is inconvenient to finely adjust the angle of the butt joint of the steel pipes.
[0006] To solve the above technical problems, the present invention provides the following technical solution: A steel pipe pole circumferential seam welding tooling capable of assisting butt joint includes a bracket fixedly installed on the ground;
[0007] An adjustment structure is fixedly installed on the ground inside the bracket. The adjustment structure includes an electric push rod, a fixed rod, and a first connecting rod. The electric push rod is fixedly installed on the ground inside the bracket. One end of the electric push rod extends to the outside of the bracket and is fixedly installed with a fixed rod. The fixed rod is evenly rotatably connected with a first connecting rod on the side away from the bracket;
[0008] First bases are fixedly installed on the ground at both ends of the fixed rod. Swing structures are fixedly installed on the ground inside the first bases. Fixed seats are fixedly installed on the sides away from the bracket at the tops of the first bases and the swing structures. Moving structures are arranged on the sides close to the bracket at the tops of the first bases and the swing structures. The moving structure includes a moving seat, a sliding rod, and a connecting groove. The moving seat is arranged on the sides close to the bracket at the tops of the first bases and the swing structures. Sliding rods penetrate through both sides inside the moving seat. A connecting groove is opened at the middle position of the bottom end of the moving seat. Support structures are fixedly installed on the tops of the moving seat and the fixed seat;
[0009] A second fine adjustment structure is arranged on the side away from the bracket of the swing structure. A first fine adjustment structure is arranged at the corner position of the swing structure on one side of the second fine adjustment structure.
[0010] Preferably, one end of the sliding rod is fixedly connected to one side of the fixed seat. The moving seat is slidably connected with the sliding rod. The inner side wall of the top of the connecting groove is hinged to one end of the first connecting rod.
[0011] Preferably, the support structure includes a support roller, a support rod, a bearing, a support seat, an I-beam, and a hoop. The support roller is arranged directly above the moving seat and the fixed seat. Support rods penetrate through the inside of the support roller. Bearings are fixedly installed on the outer walls of the support rods at both ends inside the support roller. Support seats are arranged on both sides of the bottom end of the support rod. I-beams are fixedly installed at the bottom ends of the support seats. Hoops are installed on the outside of the support rods at the top ends of the support seats through bolts.
[0012] Preferably, the support roller and the support rod are rotatably connected through a bearing. Reserved grooves are opened at both ends of the bottom of the support rod. The support rod and the support seat are in contact through the reserved grooves. The bottom ends of the I-beams are respectively fixedly connected to the tops of the moving seat and the fixed seat.
[0013] Preferably, the swing structure includes a swing seat, a second base, a spherical convex block, and a connecting seat. The second base is fixedly installed on the ground inside the first base. The spherical convex block is fixedly installed at the top of the second base. A connecting seat is arranged on the outside of the top of the spherical convex block. The swing seat is fixedly installed at the top of the connecting seat.
[0014] Preferably, one side of the top end of the swing seat is fixedly connected to the bottom end of the fixed seat, the other side of the top end of the swing seat abuts against the bottom end of the moving seat, and the spherical bump is in spherical sliding connection with the connecting seat.
[0015] Preferably, the first fine-tuning structure includes a first threaded sleeve, a first threaded rod, a hinge rod and a hinge seat. The first threaded sleeve is arranged at the corner position on one side of the swing seat. Both ends inside the first threaded sleeve are threadedly connected with first threaded rods. On both sides of one end of each first threaded rod, there is a hinge rod hinged, and one end of each hinge rod is hinged with a hinge seat.
[0016] Preferably, the thread directions of the first threaded rods at both ends of the first threaded sleeve are opposite. One end of the hinge seats above both ends of the first threaded sleeve extends into the swing seat and is hinged with the swing seat. One end of the hinge seats below both ends of the first threaded sleeve extends into the second base and is hinged with the second base.
[0017] Preferably, the second fine-tuning structure includes a second threaded sleeve, a second threaded rod and a second connecting rod. The second threaded sleeve is arranged on the side of the swing seat away from the bracket. Both ends inside the second threaded sleeve are threadedly connected with second threaded rods, and one end of each second threaded rod is hinged with a second connecting rod.
[0018] Preferably, the thread directions of the second threaded rods at both ends of the second threaded sleeve are opposite, and one end of the second connecting rod is rotatably connected to one side of the swing seat.
[0019] The advantages of a steel pipe rod circumferential seam welding tooling capable of auxiliary docking provided by the present invention are as follows:
[0020] By providing the first fine-tuning structure, rotating the first threaded sleeve makes the first threaded rods at both ends of the first threaded sleeve approach or separate from each other. Then, the first threaded rods drive the swing seat to swing up and down through the hinge rods and the hinge seats, so as to finely adjust the vertical angle of the docking heads of the two steel pipe rods, facilitating their precise docking.
[0021] Furthermore, rotating the second threaded sleeve makes the second threaded rods at both ends of the second threaded sleeve approach or separate from each other. Then, the second threaded rods drive the swing seat to rotate through the second connecting rods, so as to finely adjust the horizontal angle of the docking heads of the two steel pipe rods, further improving the docking accuracy, enabling the docking heads of the two steel pipes to be in full contact, avoiding the occurrence of empty lifting at the weld seam, and improving the welding quality.
[0022] Further, start the electric push rod. The electric push rod will drive the moving seat to move through the fixed rod and the first connecting rod, changing the distance between the two sets of support rollers. As a result, the device can support steel pipe poles with different diameters. At the same time, the first connecting rod is hinged to the inner side wall of the moving seat, preventing the first connecting rod from interfering with the displacement of the moving seat during the angle fine-tuning process.
[0023] Further, the support roller is rotatably sleeved on the outer side of the support rod through a bearing, enabling the support rod to support the weight of the steel pipe pole and extending the service life of the support roller. At the same time, the support rod and the support seat are in contact through the reserved groove, making the installation of the support rod more stable with the support seat.
[0024] Further, the spherical convex block and the connecting seat are in spherical sliding connection, enabling the swing seat to swing flexibly above the second base when fine-tuning the angle of the steel pipe pole docking head, facilitating full contact with the docking head. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is the front view schematic diagram of the present invention;
[0026] Figure 2 is the bottom view schematic diagram of the present invention;
[0027] Figure 3 is the rear view schematic diagram of the present invention;
[0028] Figure 4 is the front view schematic diagram of the adjustment structure of the present invention;
[0029] Figure 5 is the partial bottom view schematic diagram of the adjustment structure of the present invention;
[0030] Figure 6 is the front view sectional schematic diagram of the support structure of the present invention;
[0031] Figure 7 is the front view sectional schematic diagram of the swing structure of the present invention;
[0032] Figure 8 is the bottom view sectional schematic diagram of the first fine-tuning structure of the present invention;
[0033] Figure 9 is the front view sectional schematic diagram of the first fine-tuning structure of the present invention;
[0034] Figure 10 is the top view sectional schematic diagram of the second fine-tuning structure of the present invention.
[0035] Description of the reference numerals in the figures: 1, support; 2, adjustment structure; 21, electric push rod; 22, fixed rod; 23, first connecting rod; 3, first base; 4, moving structure; 41, moving seat; 42, sliding rod; 43, connecting groove; 5, fixed seat; 6, support structure; 61, support roller; 62, support rod; 63, bearing; 64, support base; 65, I-beam; 66, hoop; 7, swing structure; 71, swing seat; 72, second base; 73, spherical convex block; 74, connecting seat; 8, first fine-tuning structure; 81, first threaded sleeve; 82, first threaded rod; 83, hinged rod; 84, hinge seat; 9, second fine-tuning structure; 91, second threaded sleeve; 92, second threaded rod; 93, second connecting rod. Detailed implementation manners
[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0037] Please refer to Figures 1 - 10 , a steel pipe rod circumferential seam welding tooling that can perform auxiliary docking provided by the present invention, including a support 1 fixedly installed on the ground.
[0038] Referring to Figures 1 - 5 As shown, an adjustment structure 2 is fixedly installed on the ground inside the support 1. The adjustment structure 2 includes an electric push rod 21, a fixed rod 22, and a first connecting rod 23. The electric push rod 21 is fixedly installed on the ground inside the support 1. One end of the electric push rod 21 extends to the outside of the support 1 and is fixedly installed with a fixed rod 22. The first connecting rods 23 are evenly rotatably connected to the side of the fixed rod 22 away from the support 1. First bases 3 are fixedly installed on the ground at both ends of the fixed rod 22. Fixed seats 5 are fixedly installed on one side of the first base 3 and the top end of the swing structure 7 away from the support 1. Moving structures 4 are provided on one side of the first base 3 and the top end of the swing structure 7 close to the support 1. The moving structure 4 includes a moving seat 41, a sliding rod 42, and a connecting groove 43. The moving seat 41 is arranged on one side of the first base 3 and the top end of the swing structure 7 close to the support 1. Sliding rods 42 penetrate through both sides inside the moving seat 41. A connecting groove 43 is opened at the middle position of the bottom end of the moving seat 41. One end of the sliding rod 42 is fixedly connected to one side of the fixed seat 5. The moving seat 41 is slidably connected to the sliding rod 42. The inner side wall of the top of the connecting groove 43 is hinged to one end of the first connecting rod 23.
[0039] In use, the bracket 1, the electric push rod 21, the first base 3 and the second base 72 are fixed to the ground, and the welding robot is installed at the top of the bracket 1. The electric push rod 21 is started, and the electric push rod 21 drives the first connecting rod 23 to move through the fixed rod 22. The first connecting rod 23 drives the moving seat 41 to slide on the tops of the first base 3 and the swing seat 71. Under the guiding action of the sliding rod 42, the support rollers 61 above the moving seat 41 and the corresponding fixed seat 5 are always in a parallel state. The moving seat 41 is moved to a suitable position according to the diameter of the steel pipe pole, so that two adjacent groups of support rollers 61 are located on both sides of the bottom of the steel pipe pole. Two steel pipe poles are placed on the tops of the support rollers 61, so that the support rollers 61 stably support the steel pipe poles. At the same time, the butt joints of the two steel pipe poles are located on one side of the bracket 1, which is convenient for the welding robot to weld the circumferential seam.
[0040] Refer to Figure 1 and Figure 6 As shown, support structures 6 are fixedly installed at the tops of the moving seat 41 and the fixed seat 5. The support structure 6 includes support rollers 61, support rods 62, bearings 63, support seats 64, I-beams 65 and hoops 66. The support rollers 61 are arranged directly above the moving seat 41 and the fixed seat 5. Support rods 62 penetrate through the interiors of the support rollers 61. Bearings 63 are fixedly installed on the outer walls of the support rods 62 at both ends inside the support rollers 61. Support seats 64 are arranged on both sides of the bottom ends of the support rods 62. I-beams 65 are fixedly installed at the bottom ends of the support seats 64. Hoops 66 are installed on the outside of the support rods 62 at the top ends of the support seats 64 through bolts. The support rollers 61 and the support rods 62 are rotationally connected through the bearings 63. Reserved grooves are formed at both ends of the bottom of the support rod 62. The support rod 62 and the support seat 64 are in contact through the reserved grooves. The bottom ends of the I-beams 65 are fixedly connected to the tops of the moving seat 41 and the fixed seat 5 respectively.
[0041] During the welding process of the steel pipe pole, it rotates through the driving component, and the support rod 62 penetrates through the interior of the support roller 61, so that the support rod 62 supports the steel pipe pole through the support roller 61, avoiding fracture at the connection position between the support roller 61 and the support seat 64. The support rod 62 and the support seat 64 are in contact through the reserved grooves, increasing the contact area between the support rod 62 and the support seat 64 and enhancing the stability of the connection. At the same time, the support roller 61 and the support rod 62 are rotationally connected through the bearing 63, reducing the friction between the support roller 61 and the support rod 62, thereby reducing the resistance when the two steel pipe poles rotate and avoiding cracking of the weld during rotation.
[0042] Refer to Figure 3 and Figures 7 - 10As shown, swing structures 7 are fixedly installed on the ground inside the first base 3. The swing structure 7 includes a swing seat 71, a second base 72, a spherical convex block 73, and a connecting seat 74. The second base 72 is fixed to the ground inside the first base 3. A spherical convex block 73 is fixed to the top end of the second base 72. A connecting seat 74 is arranged on the outer side of the top of the spherical convex block 73. A swing seat 71 is fixed to the top end of the connecting seat 74. One side of the top end of the swing seat 71 is fixedly connected to the bottom end of the fixed seat 5, and the other side of the top end of the swing seat 71 abuts against the bottom end of the moving seat 41. The spherical convex block 73 and the connecting seat 74 are in spherical sliding connection. A second fine-tuning structure 9 is arranged on the side of the swing structure 7 away from the bracket 1. The second fine-tuning structure 9 includes a second threaded sleeve 91, a second threaded rod 92, and a second connecting rod 93. The second threaded sleeve 91 is arranged on the side of the swing seat 71 away from the bracket 1. Both ends inside the second threaded sleeve 91 are threadedly connected with second threaded rods 92. One end of each second threaded rod 92 is hinged with a second connecting rod 93. The threading directions of the second threaded rods 92 at both ends of the second threaded sleeve 91 are opposite. One end of the second connecting rod 93 is rotatably connected to one side of the swing seat 71. A first fine-tuning structure 8 is arranged at the corner position of the swing structure 7 on one side of the second fine-tuning structure 9. The first fine-tuning structure 8 includes a first threaded sleeve 81, a first threaded rod 82, a hinge rod 83, and a hinge seat 84. The first threaded sleeve 81 is arranged at the corner position on one side of the swing seat 71. Both ends inside the first threaded sleeve 81 are threadedly connected with first threaded rods 82. Both sides of one end of each first threaded rod 82 are hinged with a hinge rod 83. One end of each hinge rod 83 is hinged with a hinge seat 84. The threading directions of the first threaded rods 82 at both ends of the first threaded sleeve 81 are opposite. One end of the hinge seats 84 above both ends of the first threaded sleeve 81 extends into the inside of the swing seat 71 and is hinged with the swing seat 71. One end of the hinge seats 84 below both ends of the first threaded sleeve 81 extends into the inside of the second base 72 and is hinged with the second base 72.
[0043] When the butting joints of two steel pipe poles are in contact, affected by the length of the steel pipe poles, gaps are likely to occur on the contact surfaces of the butting joints. Rotate the first threaded sleeve 81 to make the first threaded rods 82 at both ends of the first threaded sleeve 81 approach or separate from each other. Further, the first threaded rods 82 drive the swing seat 71 to swing up and down through the hinge rods 83 and the hinge seats 84, so as to finely adjust the vertical angle of the butting joints of the two groups of steel pipe poles. Rotate the second threaded sleeve 91 to make the second threaded rods 92 at both ends of the second threaded sleeve 91 approach or separate from each other. Further, the second threaded rods 92 drive the swing seat 71 to rotate through the second connecting rods 93, so as to finely adjust the horizontal angle of the butting joints of the two groups of steel pipe poles. One end of the hinge seat 84 is respectively hinged to the swing seat 71 and the second base 72. One end of the second connecting rod 93 is rotatably connected to one side of the swing seat 71. The spherical convex block 73 and the connecting seat 74 are in spherical sliding connection, so that when the swing seat 71 finely adjusts the angle of the butting joint of the steel pipe pole, the swing seat 71 can swing flexibly above the second base 72. Further, when the first threaded sleeve 81 and the second threaded sleeve 91 rotate, they can drive the swing seat 71 to adjust the angle, avoiding interference with each other during movement.
[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A steel pipe rod circumferential seam welding tooling capable of auxiliary docking, comprising a bracket (1) fixedly installed on the ground; Characterized in that: An adjusting structure (2) is fixedly installed on the ground inside the bracket (1). The adjusting structure (2) includes an electric push rod (21), a fixed rod (22) and a first connecting rod (23). The electric push rod (21) is fixedly installed on the ground inside the bracket (1). One end of the electric push rod (21) extends to the outside of the bracket (1) and is fixedly installed with a fixed rod (22). The fixed rod (22) is evenly rotatably connected with a first connecting rod (23) on the side away from the bracket (1); First bases (3) are fixedly installed on the ground at both ends of the fixed rod (22). Swing structures (7) are fixedly installed on the ground inside the first bases (3). Fixed seats (5) are fixedly installed on the sides of the first bases (3) and the swing structures (7) away from the bracket (1). Moving structures (4) are arranged on the sides of the first bases (3) and the swing structures (7) close to the bracket (1). The moving structure (4) includes a moving seat (41), a sliding rod (42) and a connecting groove (43). The moving seat (41) is arranged on the sides of the first bases (3) and the swing structures (7) close to the bracket (1). Sliding rods (42) penetrate through both sides inside the moving seat (41). A connecting groove (43) is opened at the middle position of the bottom end of the moving seat (41). Support structures (6) are fixedly installed on the tops of the moving seat (41) and the fixed seat (5); The swing structure (7) includes a swing seat (71), a second base (72), a spherical convex block (73) and a connecting seat (74). A second fine-tuning structure (9) is arranged on the side of the swing structure (7) away from the bracket (1). A first fine-tuning structure (8) is arranged at the corner position of the swing structure (7) on one side of the second fine-tuning structure (9); The first fine-tuning structure (8) includes a first threaded sleeve (81), a first threaded rod (82), a hinged rod (83) and a hinge seat (84). The first threaded sleeve (81) is arranged at the corner position on one side of the swing seat (71). Both ends inside the first threaded sleeve (81) are threadedly connected with a first threaded rod (82). Hinged rods (83) are hinged on both sides of one end of the first threaded rod (82). One ends of the hinged rods (83) are hinged with a hinge seat (84); The second fine-tuning structure (9) includes a second threaded sleeve (91), a second threaded rod (92) and a second connecting rod (93). The second threaded sleeve (91) is arranged on the side of the swing seat (71) away from the bracket (1). Both ends inside the second threaded sleeve (91) are threadedly connected with a second threaded rod (92). Second connecting rods (93) are hinged on one end of the second threaded rod (92).
2. The circumferential seam welding tooling for steel pipe poles capable of auxiliary docking according to claim 1, wherein: One end of the sliding rod (42) is fixedly connected with one side of the fixed seat (5). The moving seat (41) is slidably connected with the sliding rod (42). The inner side wall of the top of the connecting groove (43) is hinged with one end of the first connecting rod (23).
3. The circumferential seam welding tooling for steel pipe poles capable of auxiliary docking according to claim 1, characterized in that: The support structure (6) includes a support roller (61), a support rod (62), a bearing (63), a support seat (64), an I-beam (65) and a hoop (66). The support roller (61) is arranged directly above the moving seat (41) and the fixed seat (5). The support rod (62) penetrates through the inside of the support roller (61). Bearings (63) are fixed on the outer walls of the support rod (62) at both ends inside the support roller (61). Support seats (64) are arranged on both sides of the bottom end of the support rod (62). The I-beams (65) are fixed to the bottom ends of the support seats (64). A hoop (66) is installed on the outside of the support rod (62) at the top end of the support seat (64) through bolts.
4. The circumferential seam welding tooling for steel pipe poles capable of auxiliary docking according to claim 3, characterized in that: The support roller (61) and the support rod (62) are rotatably connected through the bearing (63). Reserved grooves are provided at both ends of the bottom of the support rod (62). The support rod (62) and the support seat (64) are in contact with each other through the reserved grooves. The bottom ends of the I-beams (65) are fixedly connected to the top ends of the moving seat (41) and the fixed seat (5) respectively.
5. The circumferential welding tooling for steel pipe poles capable of auxiliary docking according to claim 1, characterized in that: One side of the top end of the swing seat (71) is fixedly connected to the bottom end of the fixed seat (5). The other side of the top end of the swing seat (71) is in contact with the bottom end of the moving seat (41). The spherical convex block (73) and the connecting seat (74) are in spherical sliding connection. The second base (72) is fixed on the ground inside the first base (3). The spherical convex block (73) is fixed to the top end of the second base (72). The connecting seat (74) is arranged on the outside of the top of the spherical convex block (73). The swing seat (71) is fixed to the top end of the connecting seat (74).
6. The circumferential seam welding tooling for steel pipe poles capable of auxiliary docking according to claim 5, wherein: The thread directions of the first threaded rods (82) at both ends of the first threaded sleeve (81) are opposite. One end of the hinge seat (84) above both ends of the first threaded sleeve (81) extends into the inside of the swing seat (71) and is hinged to the swing seat (71). One end of the hinge seat (84) below both ends of the first threaded sleeve (81) extends into the inside of the second base (72) and is hinged to the second base (72).
7. The circumferential seam welding tooling for steel pipe poles capable of auxiliary docking according to claim 1, wherein: The thread directions of the second threaded rods (92) at both ends of the second threaded sleeve (91) are opposite. One end of the second connecting rod (93) is rotatably connected to one side of the swing seat (71).
Citation Information
Patent Citations
Tool clamp for steel pipe welding
CN118218901A
Five-freedom adjustable pipeline butt joint tooling
CN103143878A
Welding auxiliary device for butt joint of steel pipes with different pipe diameters
CN109352240A