Steel plate welding tooling

Abstract

The present application relates to welding equipment technical field, disclose a steel sheet welding tool, including processing platform, still including setting up on processing platform's semi-automatic welding mechanism and gap plate, processing platform includes support base and the press seat located above support base, the press seat includes two symmetrical setting press plate, and the cross section of press plate is L-shaped, and the interval is formed welding seam between two press plate, the bottom of press plate is equipped with the threaded hole for passing through the positioning stud, the semi-automatic welding mechanism includes guide rail, welding machine, positioning mechanism and welding torch, the guide rail is fixed to the side wall of press plate, the welding machine is set up on the guide rail, the top of welding machine is provided with the positioning column, the positioning mechanism is set up on the positioning column, the welding torch is set up on the positioning mechanism, the gap plate is the shape of T, sets up multiple on the processing platform, including horizontal plate and vertical plate, the present application intends to provide steel sheet welding tool, to solve the problem of garbage incinerator manufacturing process, the labor intensity of welding work is bigger, the production efficiency is lower.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically to a steel plate welding fixture. Background Technology

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure.

[0003] Existing waste incinerators and their supporting equipment (such as ash removal machines) extensively employ welding technology in their manufacturing process. Most of their components are welded from steel plates, and due to the differences in the shapes of the various components, the steel plates also have polygonal structures such as triangles and quadrilaterals. Before welding, the welder needs to align the steel plates with the welding points, ensuring that the welding areas maintain a certain distance to guarantee high strength and stability of the weld before proceeding with the welding.

[0004] In this process, the existing technology has the following technical problems:

[0005] 1. The steel plates of waste incinerators are mostly large in size and heavy in weight. The welding part of the two steel plates lacks auxiliary devices to help determine the gap. Welders need to repeatedly align the plates to ensure the gap accuracy, resulting in high labor intensity and low production efficiency.

[0006] 2. The welding of steel plates in waste incinerators is generally done manually by welders, which means that the automation level of steel plate welding is not high, resulting in high labor intensity and low production efficiency.

[0007] 3. The auxiliary positioning mechanism has a low degree of integration, which means that workers need to use multiple positioning mechanisms to assist in positioning, resulting in low production efficiency. Summary of the Invention

[0008] The present invention aims to provide steel plate welding fixtures to solve the problems of high labor intensity and low production efficiency in the welding work during the manufacturing process of waste incinerators.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a steel plate welding fixture, including a processing table, and a semi-automatic welding mechanism and a gap plate disposed on the processing table. The processing table includes a support base and a clamping seat located above the support base. The clamping seat includes two symmetrically arranged clamping plates, and the cross-section of the clamping plates is L-shaped. The two clamping plates are spaced a certain distance apart to form a weld seam. The bottom of the clamping plate is provided with a threaded hole for passing through a positioning stud.

[0010] The semi-automatic welding mechanism includes a guide rail, a welding machine, a positioning mechanism, and a welding torch. A support rod is provided at the bottom of the guide rail, and the end of the support rod is fixed to the side wall of the pressure plate so that the guide rail is parallel to the welding seam. The welding machine is set on the guide rail, and a positioning column is provided on the top of the welding machine. The positioning mechanism is set on the positioning column, and the welding torch is set on the positioning mechanism.

[0011] The gap plates are T-shaped, and multiple plates are set on the processing table, including horizontal plates and vertical plates welded to the middle of the horizontal plates.

[0012] The principles and advantages of this scheme are:

[0013] 1. Facilitates the determination of the optimal weld spacing: The support base of the processing table can be used to place two steel plates to be welded. Multiple gap plates are placed between the two steel plates to be welded. The gap left after the steel plates to be welded are closed is equal to the thickness of the gap plates, which is the optimal welding distance. This effectively reduces the labor intensity of welders in aligning the weld.

[0014] 2. Facilitates replacement of manual welding and ensures welding accuracy: After the gap between the steel plates is determined, the steel plates to be welded are fixed on the support base using the positioning studs on both sides of the weld seam. The gap plate is removed, the positioning mechanism is adjusted so that the welding torch is aligned with the weld seam, the welding machine is started and the welding torch is ignited. The welding machine moves in a straight line along the track and quickly completes the welding work, effectively replacing manual welding and improving welding efficiency.

[0015] Preferably, as an improvement, the positioning mechanism includes a long shaft mounting sleeve, a first gear handle, a second gear handle, a third gear handle, a movable long shaft, a rack sleeve, a first rack shaft, a second rack shaft, a transition sleeve, and a mounting sleeve;

[0016] The long shaft mounting bushing is fixed on the positioning post. The long shaft mounting bushing includes a first vertical sleeve, a first connecting sleeve, a first horizontal sleeve, and a first adjusting sleeve inclinedly disposed on the first connecting sleeve. The first horizontal sleeve is connected to the first adjusting sleeve.

[0017] Preferably, as an improvement, the first gear handle includes a gear shaft and a handle, with the handle disposed at one end of the gear shaft, and the gear-bearing end of the gear shaft fixed inside the first adjusting sleeve.

[0018] Multiple teeth are provided on one side of the movable long shaft, which passes through the first transverse bushing, and the gear of the first gear handle meshes with the teeth of the movable long shaft.

[0019] Preferably, as an improvement, the rack sleeve is disposed on the movable long shaft, and the rack sleeve includes a second transverse sleeve, a second connecting shaft sleeve, a second adjusting sleeve, a second vertical sleeve, a gear fixing base, and a third vertical shaft sleeve;

[0020] One end of the second connecting sleeve is fixed to the second transverse sleeve, the second adjusting sleeve is inclinedly arranged in the middle of the second connecting sleeve, the other end of the second connecting sleeve is fixed to the second vertical sleeve, and the second vertical sleeve is fixed to the third vertical sleeve through a gear fixing base;

[0021] The second transverse sleeve is fitted onto the movable long shaft. The second transverse sleeve has a threaded hole, and a locking screw is installed inside the threaded hole. The second adjusting sleeve has a second gear handle, and the gear of the second gear handle meshes with the gear of the movable long shaft.

[0022] Preferably, as an improvement, the second vertical sleeve and the third vertical sleeve have side openings, and two sets of locking bases for bolt locking are provided on both sides of the openings. A gear mounting base is provided between the two sets of locking bases, and the gear mounting base is used to fix the second vertical sleeve and the third vertical sleeve.

[0023] A first rack shaft and a second rack shaft are provided inside the second vertical sleeve and the third vertical sleeve, respectively. The racks of the first rack shaft and the second rack shaft protrude from the side openings of the second vertical sleeve and the third vertical sleeve. A gap plate is fixed to the bottom of the first rack shaft, and a welding gun is fixed to the bottom of the second rack shaft.

[0024] Preferably, as an improvement, a third gear handle is provided inside the gear fixing base, and the gear of the third gear handle meshes with the racks of the first rack shaft and the second rack shaft.

[0025] Beneficial effects:

[0026] 1. Improve welding efficiency: The welding torch can be moved longitudinally by using the first gear handle and the second gear handle in conjunction with the moving long shaft; the welding torch and the gap plate fixed at the bottom of the rack shaft can be raised and lowered in the vertical direction by using the third gear handle in conjunction with the first rack shaft and the second rack shaft.

[0027] 2. Reduce labor intensity: Fixing the gap plate to the bottom of the rack shaft can fix the linear feed path of the gap plate, making it easier to use the fixed gap plate to help determine the weld of the steel plate, and avoiding the need for manual removal of the gap plate, which helps to improve welding efficiency and reduce the labor intensity of workers.

[0028] Preferably, as an improvement, the positioning mechanism includes a double rack bushing, a second rack shaft, a third rack shaft, a rotating long shaft, and a long shaft rotating rocker arm;

[0029] The double rack bushing includes a shaft mounting bushing, a support plate, a connecting plate, and a rack bushing. The shaft mounting bushing is fixed on a positioning post. The support plate is located on one side of the shaft mounting bushing. A mounting hole is opened in the middle of the support plate, and a positioning screw hole is opened at the top of the support plate. A set screw is installed in the positioning screw hole.

[0030] Preferably, as an improvement, the connecting plates are symmetrically arranged on both sides of the mounting hole, and one end of the connecting plate is fixed to the support plate, while the other end of the connecting plate is used to fix the rack bushing; the rack bushing has a meshing opening on its side.

[0031] The second and third rack shafts include a shaft body and a rack, with the rack disposed on the side of the shaft body; the second and third rack shafts are symmetrically installed inside the rack shaft sleeve, with the rack protruding from the meshing opening; the welding torch is fixed to the bottom of the third rack shaft; a gap plate is disposed at the bottom of the second rack shaft;

[0032] A gear is provided at the end of the rotating long shaft, and an annular boss is provided circumferentially in the middle of the rotating long shaft. The rotating long shaft passes through the mounting hole, and the gear at the end of the rotating long shaft meshes with the racks of the second rack shaft and the third rack shaft.

[0033] Beneficial effects:

[0034] 1. Improved Welding Efficiency: By using a double rack and pinion bushing to mount the rotating long shaft, the third rack and pinion, and the fourth rack and pinion, the gear on the rotating long shaft meshes with the racks on the third and fourth rack and pinion. When the rotating long shaft rotates clockwise, the fourth rack and pinion descends while the third rack and pinion ascends; when the rotating long shaft rotates counterclockwise, the fourth rack and pinion ascends while the third rack and pinion descends. This allows the gap plate fixed at the bottom of the third rack and the welding torch fixed at the bottom of the fourth rack and pinion to complete the rising and falling switching action. Since the lengths of the rotating long shaft and the third and fourth rack and pinion are fixed, the positions of the gap plate at the bottom of the third rack and the welding torch fixed at the bottom of the fourth rack and pinion are fixed, saving the action of adjusting the position of the gap plate and the welding torch, which can effectively improve welding efficiency.

[0035] 2. Improve welding stability: The set screws on the top of the support plate can prevent the rotation of the long shaft, thereby avoiding changes in the position of the welding torch or gap plate during the welding process, which could lead to welding deviations.

[0036] Preferably, as an improvement, the bottom ends of the horizontal plate of the gap plate are provided with slots, which are placed on the pressing plate; the vertical plate end of the gap plate is provided with a universal ball head, and an auxiliary alignment plate is provided on the universal ball head.

[0037] Beneficial effects:

[0038] 1. Improve alignment stability: The groove can effectively ensure that the gap plate slides along the pressure plate.

[0039] 2. Improved Alignment Efficiency: Utilizing an auxiliary alignment plate at the end of the vertical plate, when the side wall of the vertical plate of the gap plate is in contact with the plane of the steel plate to be welded, the clamping plate is in contact with another plane intersecting the plane of the steel plate to be welded. Since the auxiliary alignment plate is connected to the vertical plate via a universal ball joint, the auxiliary alignment plate can rotate around the ball joint, allowing it to be in contact with another plane intersecting the plane of the first steel plate to be welded. This makes the clamping plate an extension of the intersecting plane. After the second steel plate is placed on the processing table, the first and second steel plates can be quickly aligned along the clamping plate, ensuring that the surfaces of the first and second steel plates on the side of the area to be welded are on the same straight line and in contact with the clamping plate. This effectively achieves rapid alignment and weld seam determination, improving welding efficiency and reducing worker labor intensity.

[0040] Preferably, as an improvement, an auxiliary support frame is provided on the side wall of the support base.

[0041] Beneficial effects: Setting up auxiliary support frames can be used to support steel plates, reducing the need for workers to continuously support the steel plates when adjusting their angle, thus reducing the labor intensity of workers. Attached Figure Description

[0042] Figure 1 This is a perspective view of Embodiment 1 of the present invention.

[0043] Figure 2 This is an enlarged schematic diagram of the positioning mechanism in Embodiment 1 of the present invention.

[0044] Figure 3 This is a schematic diagram of the gap plate in Embodiment 1 of the present invention.

[0045] Figure 4 This is a perspective view of Embodiment 2 of the present invention.

[0046] Figure 5 This is an enlarged schematic diagram of the positioning mechanism in Embodiment 2 of the present invention.

[0047] Figure 6 This is a schematic diagram of the improved gap plate structure in Embodiment 2 of the present invention.

[0048] Figure 7 This is a schematic diagram of the improved gap plate installation according to Embodiment 2 of the present invention. Detailed Implementation

[0049] The following detailed description illustrates the specific implementation method:

[0050] The reference numerals in the accompanying drawings include:

[0051] Support base 1, clamping plate 2, welding seam 21, positioning stud 22, gap plate 3, horizontal plate 31, groove 311, vertical plate 32, universal ball joint 321, universal ball joint locking screw 322, auxiliary alignment plate 33, guide rail 4, welding machine 5, positioning column 51, positioning mechanism 6, long shaft mounting bushing 61, moving long shaft 62, rack sleeve 63, locking screw 631, first rack shaft 632, second rack shaft 633, first gear handle 64, second gear handle 65, third gear handle 66, positioning base 661, positioning frame 67, third rack shaft 671, fourth rack shaft 672, rotating long shaft 673, long shaft rotation rocker arm 674, set screw 675, steel plate 7, auxiliary support frame 8, welding torch 9.

[0052] Example 1 is basically as follows Figure 1 , Figure 2 As shown:

[0053] The steel plate welding fixture includes a processing table, a semi-automatic welding mechanism, and a gap plate 3 for fixing the width of the weld seam between two steel plates 7 placed on the processing table.

[0054] The processing table includes a support base 1 and a clamping seat located above the support base 1. Both ends of the support base 1 have protrusions for welding and fixing the clamping seat, creating a placement gap between the two ends of the support base 1 and the clamping seat for placing the steel plate 7. The clamping seat includes two symmetrically arranged clamping plates 2, each with an L-shaped cross-section. The two clamping plates 2 are spaced a certain distance apart, forming a weld seam 21. Both ends of the clamping plates 2 are welded and fixed to the ends of the support base 1 via fixing plates. The bottom of the clamping plates 2 has threaded holes for passing through positioning studs 22. When two steel plates 7 are placed in the placement gap below the clamping plates 2 and the weld seam distance is adjusted, they can be tightened and fixed by turning the positioning studs 22.

[0055] An auxiliary support frame 8 is welded and fixed to one side of the support base 1 to support one of the steel plates 7 placed in the placement gap. In this embodiment, the auxiliary support frame 8 consists of four longitudinally arranged H-beams and one transversely arranged H-beam. The ends of the longitudinally arranged H-beams are welded and fixed to the side wall of the processing table support base 1. The transversely arranged H-beam is welded to the bottom of the four longitudinally arranged H-beams to support the longitudinally arranged H-beams, and the upper surface of the longitudinally arranged H-beams is horizontal with the upper surface of the support base 1.

[0056] The semi-automatic welding mechanism is located on the clamping plate 2 on the side away from the auxiliary support frame 8; such as Figure 1 , Figure 2 As shown, the semi-automatic welding mechanism includes a guide rail 4, a welding machine 5, a positioning mechanism 6, and a welding torch 9. A support rod is welded to the bottom of the guide rail 4, and the end of the support rod is welded and fixed to... Figure 1The side wall of the left-side clamping plate 2 is such that the guide rail 4 is parallel to the weld seam 21 and the guide rail 4 is a certain distance from the ground, thus not affecting the placement gap formed between the two ends of the steel plate 7 when it slides into the support base 1 and the clamping seat. The pulley at the bottom of the welding machine 5 can slide on the guide rail 4. The top of the welding machine 5 is welded and fixed with a positioning column 51, and the positioning mechanism 6 is fixed to the positioning column 51 with bolts. The welding torch 9 is fixed to the positioning mechanism 6 with bolts. In this embodiment, the welding machine 5 is a Huawi CG1-30 improved semi-automatic flame cutting machine.

[0057] At least one gap plate 3 is located near Figure 1 In this embodiment, one side of the starting end of the welding machine 5 is specifically a gap plate 3, and the gap plate 3 is driven by the positioning mechanism 6.

[0058] Positioning mechanism 6 includes a horizontal adjustment section and a vertical adjustment section, such as... Figure 2 As shown, the lateral adjustment part includes a movable long shaft 62 and a long shaft mounting sleeve 61 and a rack sleeve 63 sleeved on the movable long shaft 62. Both the long shaft mounting sleeve 61 and the rack sleeve 63 are T-shaped three-way structures. The long shaft mounting sleeve 61 is fixed to the positioning post 51 through a first vertical sleeve. The rack sleeve 63 is fixed to the second vertical sleeve. The second vertical sleeve is connected to a third vertical sleeve through a hollow positioning base 661. The first rack shaft 632 is vertically slidably connected inside the second vertical sleeve. The second rack shaft 633 is vertically slidably connected inside the third vertical sleeve.

[0059] A rack is provided along the axis on the side wall of the movable long shaft 62 near the first rack shaft 632; a first gear handle 64 is provided through the connecting part of the long shaft mounting sleeve 61, and a gear that meshes with the rack on the movable long shaft 62 is provided at the lower end of the first gear handle 64. A second gear handle 65 is provided through the connecting part of the rack sleeve 63, and a gear for meshing with the rack on the movable long shaft 62 is fixed at the lower end of the second gear handle 65.

[0060] Racks are vertically arranged on opposite sides of the first rack shaft 632 and the second rack shaft 633. A third gear handle 66 is rotatably mounted on the side wall of the gear fixing base 661. A gear is mounted on one end of the third gear handle 66 that extends into the gear fixing base 661, and the gear meshes between the racks on the first rack shaft 632 and the second rack shaft 633. Strip-shaped through slots are formed on the side walls of the second and third vertical sleeves, and these slots correspond to the racks. Specifically, a gap plate 3 is welded and fixed to the bottom of the first rack shaft 632, and a welding torch 9 is bolted to the bottom of the second rack shaft 633.

[0061] like Figure 3 As shown, the gap plate 3 is T-shaped, including a horizontal plate 31 and a vertical plate 32 welded to the middle of the horizontal plate 31. Multiple gap plates are arranged on the processing table. Specifically, in this embodiment, besides... Figure 1In addition to the one fixedly welded to the bottom of the first rack shaft 632 of the positioning mechanism 6 at the starting end of the welding torch 9, multiple such mechanisms can be installed at other positions on the clamping plate 2. In this embodiment, only one mechanism is installed on the clamping plate 2 to assist in confirming the weld seam of the steel plate 7 in conjunction with the gap plate 3 fixed on the positioning mechanism 6.

[0062] Applications of steel plate welding fixtures:

[0063] Placement of steel plate 7: The first steel plate 7, which has a larger mass, is placed on the support base 1 in advance, such as... Figure 2 As shown, turn the third gear handle 66 counterclockwise to lower the gap plate 3 and raise the welding torch 9. Place the lower part of the vertical plate 32 of the gap plate 3 at the welding seam 21 of the support base 1. Then, attach the part of the first steel plate 7 to be welded to the side wall of the vertical plate 32 of the gap plate 3, and then proceed as follows... Figure 1 As shown, a gap plate 3 is placed in the middle of the weld seam 21, so that the vertical plate 32 of the gap plate 3 is in contact with the part of the first steel plate 7 to be welded. Then, the positioning stud 22 is turned to fix the first steel plate 7. Then, the part of the second steel plate 7 to be welded is placed in contact with the other side wall of the vertical plate 32 of the two gap plates 3. Then, the positioning stud 22 is tightened to lock the first steel plate 7 and the second steel plate 7 in position. Then, the third gear handle 66 is turned to raise the gap plate 3 under the first rack shaft 632 and lower the welding gun 9 under the second rack shaft 633.

[0064] Welding: Fill the weld seam with welding material, start the welding machine 5, the welding machine 5 feeds in a straight line along the track, and after the welding gun 9 moves to the weldable position, turn on the welding gun 9 to start welding. The gap plate 3 set at the lower part of the first rack shaft 632 will always be in front of the welding gun 9 at the lower part of the second rack shaft 633 on the feed path, thereby pushing open the other gap plate 3, so as to avoid the welder from manually removing the gap plate 3.

[0065] Example 2

[0066] like Figures 4-7 As shown, the difference between this embodiment and embodiment 1 is that: 1) the positioning mechanism 6 is different; 2) the structure of the gap plate 3 placed on the pressing plate 2 is different.

[0067] Specifically, such as Figure 5 As shown, the positioning mechanism 6 includes a double rack bushing, a positioning frame 67, and a third rack shaft 671 and a fourth rack shaft 672 that are vertically slidably connected within the double rack bushing. The positioning frame 67 is connected between the double rack bushing and the positioning post 51; a rotating long shaft 673 is transversely inserted within the positioning frame 67 and is rotatably connected to it.

[0068] The positioning frame 67 includes a support plate and a connecting plate. A bushing is welded and fixed to one end of the connecting plate. The bushing is welded and fixed to the positioning post 51 to fix the positioning frame 67. The connecting plate has a mounting hole, and the rotating long shaft 673 is rotatably connected to the mounting hole. The support plate is symmetrically welded and fixed to the side walls of the connecting plate on both sides of the mounting hole. A set screw 675 is provided on the top of the connecting plate corresponding to the mounting hole. The screw can be used to restrict the rotation of the rotating long shaft 673. The double rack bushing is welded and fixed to the end of the support plate. The racks of the third rack shaft 671 and the fourth rack shaft 672, which are slidably connected inside the double rack bushing, mesh with the gear provided at one end of the rotating long shaft 673.

[0069] A groove is provided at the other end of the rotating long shaft 673. This groove matches the long shaft rotating rocker 674. After the long shaft rotating rocker 674 is inserted into the groove, it can be used to rotate the rotating long shaft 673.

[0070] like Figure 6 As shown, the bottom ends of the horizontal plate 31 of the gap plate 3 have slots 311, which are placed on the clamping plate 22. In this embodiment, a straight plate for positioning is also welded to the end of the horizontal plate 31 of the gap plate 3. A universal ball joint 321 is provided at the end of the vertical plate 32 of the gap plate 3. An auxiliary alignment plate 33 is provided on the universal ball joint 321, and a threaded hole is provided on the auxiliary alignment plate 33. When the universal ball joint locking screw 322 is tightened, the universal ball joint 321 cannot rotate freely; when the universal ball joint locking screw 322 is loosened, the universal ball joint 321 can rotate freely. Specifically, the universal ball joint 321 can also be replaced by a hinge, so that the auxiliary alignment plate 33 can only swing around the hinge, which is more conducive to auxiliary alignment. It is worth noting that... Figure 6 The gap plate 3 shown can also be used in Embodiment 1.

[0071] Applications of steel plate welding fixtures:

[0072] Preparation phase: (The rest of the text appears to be a fragment and requires further context for accurate translation.) Figure 6 In the illustrated embodiment 2, the improved gap plate 3 is placed separately on top of the clamping plate 2, and as shown... Figure 7 The arrangement shown makes the feed path of the vertical plate 32 of the gap plate 3 at the bottom of the third rack shaft 671 consistent with the feed path of the vertical plate 32 of the improved gap plate 3 in this embodiment.

[0073] The purpose of the above preparations is to: make such Figure 7 The vertical plates 32 of the two gap plates 3 shown are on the same straight line.

[0074] Placing steel plate 7: When starting to place steel plate 7, quickly place the first steel plate 7 against the side wall of the already placed vertical plate 32 and the side wall of the auxiliary alignment plate 33 on the support base 1, tighten the universal ball head locking screw 322 to fix the auxiliary alignment plate 33, and fix the first steel plate 7 with the positioning screw. Quickly place the second steel plate 7 against the side wall of the vertical plate 32 and the side wall of the auxiliary alignment plate 33 on the support base 1 and fix it with the positioning screw.

[0075] Conversion: such as Figure 5 and Figure 7 As shown, rocking the long shaft rotates the rocker arm 674, causing the welding torch 9 and the gap plate 3 to complete the lifting and lowering conversion, and the gap plate 3 remains in front of the path of the welding torch 9.

[0076] Welding: such as Figure 7 As shown, after the welding machine 5 is started, the welding torch 9 feeds along the feed path to complete the welding, and the gap plate 3 in front of the welding torch 9 pushes open the gap plate 3 placed on top, thereby saving the operator's physical strength.

[0077] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A steel plate welding fixture, including a processing table, characterized in that: It also includes a semi-automatic welding machine set on the processing table. The processing table includes a support base and a clamping seat located above the support base; the clamping seat includes two symmetrically arranged clamping plates, and the cross-section of the clamping plates is L-shaped. The two clamping plates are spaced a certain distance apart to form a welded seam. The bottom of the clamping plate is provided with a threaded hole for passing through a positioning stud. The semi-automatic welding mechanism includes a guide rail, a welding machine, a positioning mechanism, and a welding torch. A support rod is provided at the bottom of the guide rail, and the end of the support rod is fixed to the side wall of the pressure plate so that the guide rail is parallel to the welding seam. The welding machine is set on the guide rail, and a positioning column is provided at the top of the welding machine. The positioning mechanism is set on the positioning column, and the welding torch is set on the positioning mechanism. The gap plate is T-shaped, and multiple gap plates are set on the processing table, including horizontal plates and vertical plates welded to the middle of the horizontal plates; The positioning mechanism includes a long shaft mounting bushing, a first gear handle, a second gear handle, a third gear handle, a movable long shaft, a rack sleeve, a first rack shaft, and a second rack shaft; The long shaft mounting bushing is fixed on the positioning column, and the long shaft mounting bushing is sleeved on one end of the movable long shaft. The rack sleeve is sleeved on the other end of the movable long shaft. The first gear handle is set on the long shaft mounting bushing, and the second gear handle, the third gear handle, the first rack shaft, and the second rack shaft are set on the rack sleeve. Both the long shaft mounting bushing and the rack sleeve are T-shaped three-way structures. The long shaft mounting bushing is fixed to the positioning post through the first vertical sleeve, and the rack sleeve is fixed to the second vertical sleeve. The second vertical sleeve is connected to the third vertical sleeve through the hollow positioning base. The first rack shaft is vertically slidably connected inside the second vertical sleeve, and the second rack shaft is vertically slidably connected inside the third vertical sleeve. A rack is provided along the axis on the side wall of the movable long shaft near the first rack shaft; a first gear handle is provided through the connecting part of the long shaft mounting bushing, and a gear that meshes with the rack on the movable long shaft is provided at the lower end of the first gear handle; a second gear handle is provided through the connecting part of the rack bushing, and a gear for meshing with the rack on the movable long shaft is fixed at the lower end of the second gear handle. A rack is vertically arranged on one side of the first rack shaft and the second rack shaft; a third gear handle is rotatably arranged on the side wall of the positioning base, and a gear is arranged at one end of the third gear handle that extends into the positioning base, and the gear meshes between the racks on the first rack shaft and the second rack shaft.

2. The steel plate welding fixture according to claim 1, characterized in that: The second and third vertical sleeves have strip-shaped through grooves on their side walls, and the strip-shaped through grooves correspond to the rack.

3. The steel plate welding fixture according to claim 1, characterized in that: The positioning mechanism includes a double rack bushing, a positioning frame, and a third rack shaft and a fourth rack shaft that are vertically slidably connected within the double rack bushing; The positioning frame is connected between the double rack bushing and the positioning column; a rotating long shaft is transversely inserted inside the positioning frame, and a gear is provided at the end of the rotating long shaft, which is rotatably connected to the positioning frame.

4. The steel plate welding fixture according to claim 3, characterized in that: The positioning frame includes a support plate and a connecting plate. One end of the connecting plate is fixed to the positioning column. The connecting plate has a mounting hole, and a rotating long shaft passes through the mounting hole and is rotatably connected to the connecting plate. The support plates are symmetrically arranged on both sides of the mounting holes, and the top of the connecting plate corresponding to the mounting holes is provided with set screws; the double rack bushing is provided at the end of the support plate, and the racks of the third rack shaft and the fourth rack shaft that are slidably connected inside the double rack bushing mesh with the gear provided at the end of the rotating long shaft.

5. The steel plate welding fixture according to any one of claims 1-4, characterized in that: The bottom ends of the horizontal plate of the gap plate have slots, which are placed on the pressing plate; the vertical plate end of the gap plate is provided with a universal ball head, and an auxiliary alignment plate is provided on the universal ball head.

6. The steel plate welding fixture according to claim 1, characterized in that: An auxiliary support frame is provided on the side wall of the support base.

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