Angle seam submerged arc welding device

Abstract

The invention relates to an angle seam submerged arc welding device which comprises a bearing table, an arc welding machine and a machining table. The machining table is arranged above the bearing table, and the arc welding machine is placed on the edge of the bearing table. A linkage module is arranged below the machining table, and a plurality of change modules are arranged on the side, facing the linkage module, of the machining table. A first long-strip-shaped hole is reserved in the machining table, a circular truncated cone is arranged on the first long-strip-shaped hole in a telescopic movement mode, a cylinder is connected to the back of the circular truncated cone, a U-shaped frame is connected to the portion, facing a workpiece, of the cylinder, a limiting module is arranged on the inner edge of the U-shaped frame, and a compensation module is arranged on the back of the U-shaped frame. According to the angle seam submerged arc welding device, through the rotary design of the variable module, the module is limited to rotate by 1 / 12 angle after each time of operation, contact points with a workpiece are replaced, contact is evenly distributed, and the service life is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of fillet submerged arc welding, and specifically relates to a fillet submerged arc welding device. Background Art

[0002] Fillet submerged arc welding is a welding technique widely used in the field of metal processing, especially in the manufacturing applications of pressure vessels and pipelines, for connecting workpieces with fillet joint structures; traditional fillet submerged arc welding equipment usually includes a bearing platform, an arc welding machine, and a processing table; during fillet submerged arc welding, affected by the welding tooling, the workpiece is prone to displacement during the welding process, affecting the welding accuracy and quality;

[0003] In view of this, a fillet submerged arc welding device is proposed. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the following technical problems existing in the prior art: during fillet submerged arc welding, affected by the welding tooling, the workpiece is prone to displacement during the welding process, affecting the welding accuracy and quality.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a fillet submerged arc welding device, including a bearing table, an arc welding machine, and a processing table;

[0007] The processing table is installed above the bearing table, and the arc welding machine is placed at the edge of the bearing table;

[0008] A linkage module is arranged below the processing table, and a plurality of variable modules are arranged on one side of the processing table facing the linkage module;

[0009] A long strip hole one is reserved on the processing table, a frustum is telescopically moved on the long strip hole one, a cylinder is connected to the back of the frustum, a U-shaped frame is connected to the part of the cylinder facing the workpiece, a limiting module is installed on the inner edge of the U-shaped frame, and a compensation module is arranged on the back of the U-shaped frame;

[0010] The said change module includes a linkage disc, a fixed seat, a second revolving column, and a fixed stop. The fixed stop is arranged on one side of the processing table. A linkage pad is arranged on one side of the fixed stop. The linkage pad is milled with continuous alveolar notches. A second revolving column is rotatably connected between the round table and the cylinder. A stabilizing module is arranged along the inner edge of the round table. The second revolving column is docked with a limiting module. Another part of the limiting module is docked with a third revolving column. The part of the third revolving column extending out of the U-shaped frame is docked with a revolving seat. The third revolving column and the revolving seat are in a rotatable connection relationship. A movement space is milled in the second revolving column. A first guiding pad telescopically moves in the movement space. The back of the first guiding pad is connected to a first folding cylinder. A first elastic member is wound around the first folding cylinder. Two ends of the first elastic member are respectively connected to the back of the first guiding pad and the inner edge of the movement space.

[0011] As a preferred technical solution of a fillet submerged arc welding device, the linkage module includes a hollow seat, a third guiding pad, and an external threaded column. The hollow seat is fixedly connected to the center position on one side of the processing table. The third guiding pad is variably arranged in the hollow seat. The external threaded column is arranged along the inner edge of the hollow seat. The external threaded column is externally threaded and connected to a pair of internal threaded seats. When the internal threaded seats rotate, a second linkage arm is arranged. The other part of the second linkage arm is rotatably connected to the back of the third guiding pad.

[0012] As a preferred technical solution of a fillet submerged arc welding device, a first umbrella disc is arranged at the middle position of the external threaded column. A motor is arranged along the inner edge of the hollow seat. The moving part of the motor is docked with a second umbrella disc. The outer contours of the first umbrella disc and the second umbrella disc are both milled with alveolar notches. The first umbrella disc and the second umbrella disc are engaged. A plurality of extension arms are fixedly connected to the outer contour of the third guiding pad.

[0013] As a preferred technical solution of a fillet submerged arc welding device, an L-shaped arm is connected to the edge of the round table. A first linkage arm is rotatably connected to the L-shaped arm. The other part of the first linkage arm is rotatably connected to the extension arm. A second long hole is reserved on the hollow seat. The extension arm telescopically moves in the second long hole.

[0014] As a preferred technical solution of a fillet submerged arc welding device, a first revolving column is arranged on the side of the first guiding pad deviating from the first folding cylinder. A linkage disc is arranged at the part of the first revolving column extending out of the second revolving column. The first revolving column and the second revolving column are in a spline connection relationship. The outer contour of the linkage disc is milled with alveolar notches. The linkage disc and the linkage pad are engaged. A fixed seat is arranged outside the first revolving column. The first revolving column can rotate in the fixed seat.

[0015] As a preferred technical solution of a fillet submerged arc welding device, a second folding cylinder is butt - jointed to the back of the fixed seat, another part of the second folding cylinder is connected to the frustum, a second guiding pad moves telescopically in the fixed seat, one side of the second guiding pad is fixedly connected with a linkage column penetrating the fixed seat, the other side of the second guiding pad is connected with a second elastic member, and a linkage groove is reserved on the fixed stop.

[0016] As a preferred technical solution of a fillet submerged arc welding device, the stabilizing module includes a fixed ring and a moving ring. The fixed ring is arranged on the inner edge of the frustum, a wedge - shaped block is arranged on the inner edge of the fixed ring, the moving ring is sleeved on the second revolving column, a notch is milled on the outer contour of the moving ring, a positioning frame is rotatably arranged in the notch, and a third elastic member is arranged between the back of the positioning frame and the middle position of the notch.

[0017] As a preferred technical solution of a fillet submerged arc welding device, the compensation module includes a guiding frame, an adapting frame and a bearing arm. The bearing arm is arranged on the back of the U - shaped frame, the guiding frame is arranged on the U - shaped frame, the adapting frame moves telescopically outside the guiding frame, one side of the adapting frame is provided with an L - shaped column, the other part of the L - shaped column is connected to the revolving seat, and a bearing plate is arranged on the side of the adapting frame deviating from the L - shaped column.

[0018] As a preferred technical solution of a fillet submerged arc welding device, a movable seat is rotatably arranged on the bearing arm, a cylinder is arranged at one end of the movable seat, the cylinder is movably located in the bearing plate, a movable frame is arranged on the back of the bearing arm, an electric telescopic device is rotatably arranged on the movable frame, and the movable part of the electric telescopic device is rotatably connected to the part of the movable seat deviating from the cylinder.

[0019] As a preferred technical solution of a fillet submerged arc welding device, the limiting module includes a first semi - cylinder, an elastic ring and a second semi - cylinder. The second semi - cylinder is butt - jointed to the second revolving column, the first semi - cylinder is butt - jointed to the third revolving column, the elastic ring is arranged at the middle position between the first semi - cylinder and the second semi - cylinder, a third folding cylinder is jointly arranged in the first semi - cylinder and the second semi - cylinder, and the first semi - cylinder and the second semi - cylinder have flexible characteristics.

[0020] Advantages of the present invention:

[0021] 1. Through the synchronous movement of the linkage module and multiple limiting modules, this fillet submerged arc welding device can accurately wrap and limit the outer contour of the workpiece, ensure the stability of the workpiece during the arc welding process, and improve the welding precision.

[0022] 2. Through the revolving design of the changing module, the limiting module rotates 1 / 12 of an angle after each operation, replaces the contact points with the workpiece, evenly distributes the touches, and prolongs the service life.

[0023] 3. Through the movement of the electric telescopic device and the adapter frame, the compensation module can perform force compensation or release according to the workpiece requirements, optimize the stress state during arc welding, and can adapt to workpieces with uneven surfaces, avoid hard contact, protect the workpiece surface, and improve welding applicability at the same time.

[0024] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will become apparent from the description or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the processing table of the present invention.

[0028] Figure 3 It is a sectional view of the linkage module of the present invention.

[0029] Figure 4 It is a schematic diagram of the second revolving column of the present invention.

[0030] Figure 5 It is a schematic diagram of the fixed stop of the present invention.

[0031] Figure 6 It is a schematic diagram of the fixed ring of the present invention.

[0032] Figure 7 It is a schematic diagram of the U-frame of the present invention.

[0033] Figure 8 It is a schematic diagram of the compensation module of the present invention.

[0034] Figure 9 It is a schematic diagram of the limiting module of the present invention.

[0035] Figure 10 It is based on the present invention Figure 3 Schematic diagram at X.

[0036] Figure 11 It is based on the present invention Figure 4 Schematic diagram at Y.

[0037] Figure 12 For the Figure 6 schematic diagram at position Z in

[0038] Reference numerals:

[0039] 10. Carrying platform; 20. Arc welder; 30. Processing table; 40. Variation module; 41. Linking disk; 42. Fixed seat; 43. First revolving column; 44. Movement space; 45. First guiding pad; 46. First folding cylinder; 47. First elastic member; 48. Second revolving column; 49. Fixed stop; 50. Linking pad; 51. Linking groove path; 52. Linking column; 53. Second guiding pad; 54. Second elastic member; 55. Third revolving column; 56. Revolving seat; 57. Second folding cylinder; 60. Linking module; 61. Round table; 62. Cylindrical tube; 63. L-shaped arm; 64. First linking arm; 65. Hollow seat; 66. Extension arm; 67. First long hole; 68. Second long hole; 69. Third guiding pad; 70. Second linking arm; 71. Motor; 72. Internal thread seat; 73. External thread column; 74. First umbrella disk; 75. Second umbrella disk; 76. U-shaped frame; 80. Compensation module; 81. L-shaped column; 82. Leading frame; 83. Adaptation frame; 84. Cylinder; 85. Carrying plate; 86. Movable seat; 87. Carrying arm; 88. Electric telescopic device; 89. Movable frame; 90. Stabilization module; 91. Fixed ring; 92. Movable ring; 93. Positioning frame; 94. Notch; 95. Third elastic member; 100. Limiting module; 101. First semi-cylinder; 102. Elastic ring; 103. Second semi-cylinder; 104. Third folding cylinder. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings in the specification.

[0041] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0042] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner 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 an embodiment that is separate from or mutually exclusive of other embodiments.

[0043] Next, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of illustration, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0044] Embodiment, referring to Figure 1 and 2 , a fillet submerged arc welding device, including a carrier table 10, an arc welding machine 20, and a processing table 30;

[0045] The processing table 30 is installed above the carrier table 10, and the arc welding machine 20 is placed at the edge of the carrier table 10;

[0046] A linkage module 60 is arranged below the processing table 30, and a plurality of variable modules 40 are arranged on one side of the processing table 30 facing the linkage module 60.

[0047] Referring to Figure 3 , 4 , 7 and 10, the linkage module 60 includes a hollow seat 65, a guide pad three 69, and an external threaded column 73. The hollow seat 65 is fixedly connected to the center position of one side of the processing table 30. The guide pad three 69 is variably arranged in the hollow seat 65. The external threaded column 73 is arranged on the inner edge of the hollow seat 65. A pair of internal threaded seats 72 are externally threaded to the external threaded column 73. When the internal threaded seats 72 rotate, a linkage arm two 70 is arranged. Another part of the linkage arm two 70 is rotatably connected to the back of the guide pad three 69. An umbrella disc one 74 is arranged at the middle position of the external threaded column 73. A motor 71 is arranged on the inner edge of the hollow seat 65. The moving part of the motor 71 is butted against an umbrella disc two 75. Tooth grooves are milled on the outer contours of both the umbrella disc one 74 and the umbrella disc two 75. The umbrella disc one 74 is engaged with the umbrella disc two 75. A plurality of extension arms 66 are fixedly connected to the outer contour of the guide pad three 69. A long slot one 67 is reserved on the processing table 30. A frustum 61 moves telescopically on the long slot one 67. A cylinder 62 is connected to the back of the frustum 61. Among them, the long slot one 67 allows the cylinder 62 to move along its radial direction. A U-shaped frame 76 is connected to the part of the cylinder 62 facing the workpiece. A limiting module 100 is arranged on the inner edge of the U-shaped frame 76. A compensation module 80 is arranged on the back of the U-shaped frame 76. An L-shaped arm 63 is connected to the edge of the frustum 61. A linkage arm one 64 is rotatably connected to the L-shaped arm 63. Another part of the linkage arm one 64 is rotatably connected to the extension arm 66. A long slot two 68 is reserved on the hollow seat 65. The extension arm 66 moves telescopically in the long slot two 68;

[0048] A plurality of limiting modules 100 move synchronously to wrap and limit the outer contour of the workpiece, and the arc welding machine 20 is used to perform arc welding on the workpiece.

[0049] Referring to Figure 4 ,5 、 7 and 11, the changing module 40 includes a linkage disk 41, a fixed seat 42, a second rotating column 48 and a fixed stop 49. The fixed stop 49 is arranged on one side of the processing table 30. A linkage pad 50 is arranged on one side of the fixed stop 49. The linkage pad 50 is milled with a continuous alveolar notch. A second rotating column 48 is rotatably connected between the round table 61 and the cylinder 62. A stabilizing module 90 is arranged along the inner edge of the round table 61. The second rotating column 48 is docked with the limiting module 100. Another part of the limiting module 100 is docked with a third rotating column 55. The part of the third rotating column 55 extending out of the U-shaped frame 76 is docked with a rotating seat 56. The third rotating column 55 and the rotating seat 56 are in a rotatable connection relationship. A movement space 44 is milled in the second rotating column 48. A first guiding pad 45 moves telescopically in the movement space 44. The back of the first guiding pad 45 is connected to a first folding cylinder 46. A first elastic member 47 is wound around the outside of the first folding cylinder 46. Two ends of the first elastic member 47 are respectively connected to the back of the first guiding pad 45 and the inner edge of the movement space 44. On one side of the first guiding pad 45 deviating from the first folding cylinder 46, a first rotating column 43 is arranged. The part of the first rotating column 43 extending out of the second rotating column 48 is provided with a linkage disk 41. The first rotating column 43 and the second rotating column 48 are in a spline connection relationship. The outer contour of the linkage disk 41 is milled with an alveolar notch. The linkage disk 41 engages with the linkage pad 50. A fixed seat 42 is arranged outside the first rotating column 43. The first rotating column 43 can rotate in the fixed seat 42. The back of the fixed seat 42 is docked with a second folding cylinder 57. Another part of the second folding cylinder 57 is connected to the round table 61. A second guiding pad 53 moves telescopically in the fixed seat 42. One side of the second guiding pad 53 is fixedly connected with a linkage column 52 passing through the fixed seat 42. The other side of the second guiding pad 53 is connected to a second elastic member 54. A linkage groove 51 is reserved on the fixed stop 49;

[0050] The linkage groove 51 includes a horizontal straight part and a slope part. The slope side with a smaller distance is chamfered. Before contacting the workpiece, the linkage column 52 is in the linkage groove 51 and the second elastic member 54 is pressed. When wrapping and restricting the workpiece, relying on the linkage module 60, the linkage column 52 moves telescopically in the linkage groove 51, and under the action of the chamfered slope side, it moves out of the linkage groove 51, and under the action of dislocation, the workpiece is restricted. At this time, relying on the first folding cylinder 46 and the first elastic member 47, the position of the linkage disk 41 can be changed. After the arc welding is completed, the limiting module 100 returns to the initial position, the linkage disk 41 engages with the linkage pad 50, the linkage disk 41 makes a rotary motion, and the first rotating column 43 and the second rotating column 48 make synchronous rotary motions at this time. The second rotating column 48 drives the limiting module 100 to move together. The movement amplitude of the limiting module 100 each time is 1 / 12. At this time, the contact point between the limiting module 100 and the workpiece can be replaced, improving the service life of the limiting module 100.

[0051] Refer to Figure 4 、 6As shown in FIGS. 11 and 12, the stabilizing module 90 includes a fixed ring 91 and a moving ring 92. The fixed ring 91 is disposed along the inner edge of the frustum 61, and a wedge block is provided along the inner edge of the fixed ring 91. The moving ring 92 is clamped onto the second rotating column 48. A notch 94 is milled on the outer contour of the moving ring 92, and a positioning bracket 93 is rotatably disposed in the notch 94. An elastic member III 95 is provided between the back of the positioning bracket 93 and the middle position of the notch 94.

[0052] When the second rotating column 48 rotates, the moving ring 92 moves therewith. The cooperation between the positioning bracket 93 and the wedge block along the inner edge of the fixed ring 91 enables the moving ring 92 to move in one direction. When the second rotating column 48 stops moving, the cooperation between the positioning bracket 93 and the wedge block is used to limit the state of the second rotating column 48 at this moment.

[0053] Refer to Figure 7 and 8 As shown in FIGS. 14 and 15, the compensation module 80 includes a guiding frame 82, an adapting frame 83 and a bearing arm 87. The bearing arm 87 is disposed on the back of the U-shaped frame 76. The guiding frame 82 is disposed on the U-shaped frame 76. The adapting frame 83 moves telescopically outside the guiding frame 82. An L-shaped column 81 is provided on one side of the adapting frame 83, and the other part of the L-shaped column 81 is connected to the rotating base 56. A bearing plate 85 is provided on the side of the adapting frame 83 away from the L-shaped column 81. A movable seat 86 is rotatably disposed on the bearing arm 87. A cylinder 84 is provided at one end of the movable seat 86, and the cylinder 84 is movably disposed in the bearing plate 85. A movable frame 89 is provided on the back of the bearing arm 87. An electric telescopic device 88 is rotatably disposed on the movable frame 89, and the movable part of the electric telescopic device 88 is rotatably connected to the part of the movable seat 86 away from the cylinder 84.

[0054] At this moment, the limiting module 100 can be deformed under pressure to be applied to workpieces with uneven surfaces.

[0055] Refer to Figures 1 to 3 As shown in FIGS. 16 and 17, the limiting module 100 includes a first semi-cylinder 101, an elastic ring 102 and a second semi-cylinder 103. The second semi-cylinder 103 is butted onto the second rotating column 48, and the first semi-cylinder 101 is butted onto the third rotating column 55. The elastic ring 102 is disposed at the middle position between the first semi-cylinder 101 and the second semi-cylinder 103. A folding cylinder III 104 is jointly disposed in the first semi-cylinder 101 and the second semi-cylinder 103, and an elastic member is disposed in the folding cylinder III 104. The first semi-cylinder 101 and the second semi-cylinder 103 have flexible plastic characteristics.

[0056] When the first semi-cylinder 101 and the second semi-cylinder 103 come into contact with the workpiece, they can avoid directly making hard contact with the surface of the workpiece.

[0057] The following can be achieved: The linkage column 52 is initially in the linkage groove 51. After the workpiece position corresponds to the processing table 30, the motor 71 drives the second umbrella disc 75, the second umbrella disc 75 drives the first umbrella disc 74 and the external thread column 73, the external thread column 73 drives the internal thread seat 72 and under the action of the second linkage arm 70, the guide pad three 69 and the extension arm 66 can perform lifting and lowering movements. The extension arm 66 drives the L arm 63, the round table 61 and the cylinder 62 to move in the first long hole 67 by relying on the first linkage arm 64. The U frame 76 moves together with the cylinder 62 and moves the limiting module 100 towards the position of the workpiece. At the appropriate position, the linkage column 52 disengages from the linkage groove 51. At this moment, with the assistance of the second folding cylinder 57, the first folding cylinder 46 and the first elastic member 47, the linkage disc 41 and the fixed seat 42 can perform lifting and lowering movements. The linkage disc 41 moves to a position flush with the height of the linkage pad 50. The second elastic member 54 acts on the linkage column 52 to touch the fixed stop 49. After wrapping and restricting the workpiece, arc welding work is carried out. After the arc welding is completed, the linkage module 60 operates in reverse. The round table 61 drives the second rotating column 48 to drive the linkage disc 41. Since the linkage disc 41 is flush with the height of the linkage pad 50 at this moment, when the position of the linkage disc 41 changes, the linkage disc 41 will engage with the linkage pad 50. At this moment, the linkage disc 41 will be driven to perform a rotating movement. The linkage disc 41 drives the first rotating column 43 and the second rotating column 48 to rotate together. The second rotating column 48 drives the limiting module 100 to rotate. At this moment, the surface of the limiting module 100 facing the workpiece will rotate by an angle of 1 / 12 of the overall angle;

[0058] When the second rotating column 48 rotates, the moving ring 92 moves accordingly. The moving ring 92 drives the positioning frame 93 to perform a rotating movement around the inner edge of the fixed ring 91. When the linkage disc 41 and the linkage pad 50 are at the same height and not engaged, the third elastic member 95 can push the positioning frame 93 between two adjacent wedge-shaped blocks. At this moment, the state of the second rotating column 48 is limited. When the linkage column 52 moves to the slope of the linkage groove 51 with a larger distance, the linkage column 52 enters the linkage groove 51 under the action of the second elastic member 54. At this moment, the operation of the single limiting module 100 is completed;

[0059] When dealing with workpieces with uneven surfaces or when wrapping and restricting the workpiece, the electric telescopic device 88 drives the movable seat 86 to rotate. The cylinder 84 can act on the bearing plate 85. At this moment, the adapter frame 83 can perform lifting and lowering movements along the guiding frame 82. The L column 81 drives the rotating seat 56 and the third rotating column 55. Under the action of the elastic ring 102 and the third folding cylinder 104, at this moment, the first half cylinder 101 and the second half cylinder 103 can perform concave and convex movements. This process can be set to achieve concave or convex through one-way control according to actual needs, which can be applied to workpieces with uneven surfaces. At the same time, force compensation or release can also be carried out after wrapping and restricting the workpiece to meet the accuracy during arc welding and can protect the workpiece.

[0060] It should be understood that in the development of any actual implementation, in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be routine work of design, fabrication, and production.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A fillet submerged arc welding device, characterized in that: It includes a carrier table, an arc welder, and a processing table; The processing table is installed above the carrier table, and the arc welder is placed at the edge of the carrier table; A linkage module is arranged below the processing table, and a plurality of variable modules are arranged on one side of the processing table facing the linkage module; A long slot one is reserved on the processing table, a frustum is telescopically moved on the long slot one, a cylinder is connected to the back of the frustum, a U-shaped frame is connected to the part of the cylinder facing the workpiece, a limiting module is installed on the inner edge of the U-shaped frame, and a compensation module is arranged on the back of the U-shaped frame; The variable module includes a linkage disk, a fixed seat, a rotary column two, and a fixed stop. The fixed stop is arranged on one side of the processing table, a linkage pad is installed on one side of the fixed stop, and a continuous tooth groove is milled on the linkage pad. A rotary column two is rotatably connected between the frustum and the cylinder. A stabilizing module is arranged on the inner edge of the frustum. The rotary column two is docked with the limiting module, and the other part of the limiting module is docked with a rotary column three. The part of the rotary column three extending out of the U-shaped frame is docked with a rotary seat, and the rotary column three and the rotary seat are in a rotatable connection relationship. A movement space is milled in the rotary column two, a guiding pad one is telescopically moved in the movement space, a folding cylinder one is connected to the back of the guiding pad one, an elastic member one is wound around the folding cylinder one, and the two ends of the elastic member one are respectively connected to the back of the guiding pad one and the inner edge of the movement space.

2. The corner joint submerged arc welding device according to claim 1, characterized in that: The linkage module includes an inner hollow seat, a guiding pad three, and an external threaded column. The inner hollow seat is fixedly connected to the central position of one side of the processing table. The guiding pad three is variably arranged in the inner hollow seat. The external threaded column is arranged on the inner edge of the inner hollow seat. The external threaded column is externally threaded and connected to a pair of internal threaded seats. A linkage arm two is arranged when the internal threaded seat rotates. The other part of the linkage arm two is rotatably connected to the back of the guiding pad three.

3. The corner joint submerged arc welding device according to claim 2, characterized in that: An umbrella disk one is arranged at the middle position of the external threaded column. A motor is arranged on the inner edge of the inner hollow seat. The moving part of the motor is docked with an umbrella disk two. Tooth grooves are milled on the outer contours of the umbrella disk one and the umbrella disk two. The umbrella disk one and the umbrella disk two are engaged. A plurality of extension arms are fixedly connected to the outer contour of the guiding pad three.

4. The corner joint submerged arc welding device according to claim 2, characterized in that: An L-shaped arm is connected to the edge of the frustum. A linkage arm one is rotatably connected to the L-shaped arm. The other part of the linkage arm one is rotatably connected to the extension arm. A long slot two is reserved on the inner hollow seat. The extension arm is telescopically moved in the long slot two.

5. The corner joint submerged arc welding device according to claim 1, characterized in that: A rotary column one is installed on one side of the guiding pad one deviating from the folding cylinder one. A linkage disk is installed on the part of the rotary column one extending out of the rotary column two. The rotary column one and the rotary column two are in a spline connection relationship. Tooth grooves are milled on the outer contour of the linkage disk. The linkage disk and the linkage pad are engaged. A fixed seat is arranged outside the rotary column one. The rotary column one can rotate in the fixed seat.

6. The corner joint submerged arc welding device according to claim 1, characterized in that: A folding cylinder two is docked with the back of the fixed seat. The other part of the folding cylinder two is connected to the frustum. A guiding pad two is telescopically moved in the fixed seat. A linkage column penetrating the fixed seat is fixedly connected to one side of the guiding pad two. An elastic member two is connected to the other side of the guiding pad two. A linkage groove is reserved on the fixed stop.

7. The corner joint submerged arc welding device according to claim 1, characterized in that: The stability module includes a fixed ring and a moving ring. The fixed ring is arranged on the inner edge of the frustum. A wedge block is installed on the inner edge of the fixed ring. The moving ring is clamped on the second revolving column. A notch is milled on the outer contour of the moving ring. A positioning frame is rotatably arranged in the notch. An elastic member three is installed between the back of the positioning frame and the middle position of the notch.

8. The corner joint submerged arc welding device according to claim 1, characterized in that: The compensation module includes a guiding frame, an adapter frame and a bearing arm. The bearing arm is arranged on the back of the U-shaped frame. The guiding frame is arranged on the U-shaped frame. The adapter frame moves telescopically outside the guiding frame. An L-shaped column is arranged on one side of the adapter frame. The other part of the L-shaped column is connected to the revolving base. A bearing plate is installed on the side of the adapter frame away from the L-shaped column.

9. The corner joint submerged arc welding device according to claim 8, characterized in that: A movable seat is rotatably arranged on the bearing arm. A cylinder is installed at one end of the movable seat. The cylinder is movably located in the bearing plate. A movable frame is installed on the back of the bearing arm. An electric telescopic device is rotatably arranged on the movable frame. The movable part of the electric telescopic device is rotatably connected to the part of the movable seat away from the cylinder.

10. The corner joint submerged arc welding device according to claim 1, characterized in that: The limiting module includes a first semi-cylinder, an elastic ring and a second semi-cylinder. The second semi-cylinder is butted on the second revolving column. The first semi-cylinder is butted on the third revolving column. The elastic ring is installed at the middle position between the first semi-cylinder and the second semi-cylinder. A third folding cylinder is jointly arranged in the first semi-cylinder and the second semi-cylinder.

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