Welding tool for special-shaped metal piece

Abstract

The utility model discloses a special-shaped metal piece welding tool which comprises a horizontally-arranged workbench, a first positioning jig and a second positioning jig. The first positioning jig and the second positioning jig are arranged at the top end of the workbench. The first positioning jig comprises a bottom plate clamp, connecting plate clamps arranged at the two ends of the bottom plate clamp respectively and ship-shaped plate clamps arranged on the two sides of the bottom plate clamp and the connecting plate clamps respectively in a sliding mode, and the second positioning jig comprises a supporting clamp and a reinforcing plate clamp. The welding tool for the special-shaped metal parts is simple in structure, the ship-shaped plates are accurately assembled to the two ends of the bottom plate and the two ends of the connecting plate through the ship-shaped plate clamps arranged in a sliding mode, the first positioning jig and the second positioning jig are arranged on the same workbench at the same time, step-by-step welding of the special-shaped metal parts is facilitated, the possibility of missing welding is reduced, and the welding efficiency is improved. The welding precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of metal product production, in particular to a welding tool for special-shaped metal parts. Background Art

[0002] Welding, also known as welding, is a manufacturing process and technology that uses heat, high temperature, or high pressure to join metals or other thermoplastic materials such as plastics. Automotive body components are primarily manufactured from stamped and welded cold-rolled steel stampings with excellent processability. Welding of automotive structures or components typically requires the use of welding fixtures to position the target parts to prevent them from loosening during welding. However, existing welding fixtures are mostly fixed clamps, meaning that the parts are completely fixed after clamping, making them unsuitable for welding components that require assembly after fixation. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of the utility model is to provide a welding tool for special-shaped metal parts to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] An embodiment of the present utility model discloses a welding tool for special-shaped metal parts, including a horizontally arranged workbench and a first positioning jig and a second positioning jig respectively arranged at the top of the workbench, and the first positioning jig and the second positioning jig are used to weld the special-shaped metal parts in steps, wherein the special-shaped metal parts include two relatively arranged ship-shaped plates, a bottom plate arranged between the two ship-shaped plates, a reinforcement plate and two connecting plates, wherein the two sides of the bottom plate and the two connecting plates are respectively plugged into and welded to the corresponding ship-shaped plates, and the two ends of the top surface of the reinforcement plate are respectively welded to the bottom surfaces of the corresponding ship-shaped plates, the first positioning jig includes a bottom plate clamp, connection plate clamps respectively arranged at both ends of the bottom plate clamp, and ship-shaped plate clamps respectively slidably arranged on both sides of the bottom plate clamp and the connection plate clamp, and the second positioning jig includes a support clamp and a reinforcement plate clamp.

[0006] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the base plate clamp includes a first positioning seat arranged on the workbench, the top surface of the first positioning seat is provided with a first positioning pin and a first positioning block corresponding to the base plate, a cylinder cavity is provided in the first positioning seat, and a rotary pressing cylinder is provided, and the piston rod of the rotary pressing cylinder is connected to the rotary pressing block corresponding to the base plate.

[0007] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, support seats are respectively provided on both sides of the first positioning seat, and the support seats include mounting blocks arranged on the side of the first positioning seat and support blocks respectively arranged on both sides of the mounting block, and several adjustment gaskets are respectively provided between the mounting block and the first positioning seat and the support block.

[0008] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the connecting plate clamp includes a connecting plate placement block and a connecting plate clamping cylinder which are respectively arranged on the workbench through a first mounting seat and a second mounting seat, the connecting plate placement block includes a first mounting plate connected to the first mounting seat and an inclined plate which is arranged at an obtuse angle to the first mounting plate, a step corresponding to the connecting plate is arranged in the inclined plate, and the piston rod of the connecting plate clamping cylinder is arranged perpendicular to the inclined plate.

[0009] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the ship-shaped plate clamp includes a second mounting plate sliding on the workbench and a clamping device arranged on the second mounting plate, and the clamping device includes a first top block abutting against the outer wall of the ship-shaped plate and a first pressure strip movably abutting against the outer wall of the ship-shaped plate.

[0010] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the first top block is arranged on the second mounting plate through a third mounting seat, and a second positioning pin corresponding to the ship-shaped plate is provided on the side of the first top block close to the ship-shaped plate, and an avoidance hole or avoidance groove corresponding to the second positioning pin is provided in the first pressure strip.

[0011] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, one end of the first pressure strip is hinged to the clamping cylinder, and the clamping cylinder is arranged on the second mounting plate through a fourth mounting seat. A bracket is provided on the side of the clamping cylinder close to the ship-shaped plate, and is hinged to the first pressure strip through a connecting rod.

[0012] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the second mounting plate is slidably set on the workbench through a guide rail, and its end facing away from the ship-shaped plate is connected to a driving cylinder, and the second mounting plate is provided with a second top block and a positioning top block corresponding to the ship-shaped plate on the side close to the ship-shaped plate, and the positioning top block is provided with a third positioning pin corresponding to the ship-shaped plate on the side close to the ship-shaped plate.

[0013] Furthermore, in the above-mentioned welding fixture for special-shaped metal parts, the supporting fixture includes a second positioning seat corresponding to the base plate and a second pressure strip movably supported on the top surface of the base plate, and the second pressure strip is provided with a first elbow to avoid the ship-shaped plate.

[0014] Furthermore, in the above-mentioned welding tooling for special-shaped metal parts, the reinforcement plate clamp includes a third positioning seat corresponding to the reinforcement plate and a third pressure strip movably supported on the top surface of the reinforcement plate, the top of the third positioning seat is provided with an inclined groove, and a fourth positioning pin corresponding to the reinforcement plate is provided in the inclined groove, and the third pressure strip is provided with a second elbow to avoid the corresponding connecting plate.

[0015] Compared with the existing technology, the advantages of the present invention are: the welding tooling structure of the special-shaped metal parts is simple, the sliding ship-shaped plate clamp accurately assembles the ship-shaped plate to the two ends of the base plate and the connecting plate, and the first positioning fixture and the second positioning fixture are simultaneously arranged on the same workbench, which facilitates the step-by-step welding of special-shaped metal parts, reduces the possibility of missed welding, and improves welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Shown is a structural schematic diagram of a welding tool for special-shaped metal parts in a specific embodiment of the present utility model.

[0018] Figure 2 Shown is a structural schematic diagram of a first positioning fixture in a specific embodiment of the present utility model.

[0019] Figure 3 Shown is a schematic structural diagram of a bottom plate clamp in a specific embodiment of the present invention.

[0020] Figure 4 Shown is a structural schematic diagram of a connecting plate clamp in a specific embodiment of the present utility model.

[0021] Figure 5 Shown is a structural schematic diagram of a ship-shaped plate clamp in a specific embodiment of the present utility model.

[0022] Figure 6 Shown is a structural schematic diagram of a second positioning fixture in a specific embodiment of the present utility model.

[0023] Figure 7 Shown is a structural schematic diagram of a supporting fixture in a specific embodiment of the present utility model.

[0024] Figure 8 Shown is a reinforcement plate clamp in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is a detailed description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Ginseng Figures 1 to 8 As shown, a welding fixture for special-shaped metal parts includes a horizontally arranged workbench and a first positioning jig and a second positioning jig respectively arranged at the top of the workbench. The first positioning jig and the second positioning jig are used to weld the special-shaped metal parts in steps. The special-shaped metal parts include two oppositely arranged ship-shaped plates 1, a bottom plate 2 arranged between the two ship-shaped plates 1, a reinforcement plate 3 and two connecting plates 4, wherein the two sides of the bottom plate 2 and the two connecting plates 4 are respectively plugged into and welded to the corresponding ship-shaped plates 1, and the two ends of the top surface of the reinforcement plate 3 are respectively welded to the bottom surface of the corresponding ship-shaped plates 1. The first positioning jig includes a bottom plate clamp 5, connecting plate clamps 6 respectively arranged at both ends of the bottom plate clamp 5, and ship-shaped plate clamps 7 respectively slidably arranged on both sides of the bottom plate clamp 5 and the connecting plate clamp 6. The second positioning jig includes a support clamp 8 and a reinforcement plate clamp 9.

[0029] The workbench is a conventional plate-shaped structure and is horizontally arranged on the table of the welding device through a conventional profile support or is detachably arranged on the table of the welding device through bolts / quick clamps, the ship-shaped plates, the bottom plates, the reinforcing plates and the connecting plates of the special-shaped metal piece are respectively produced in batches through stamping and other processes, the two ends of the bottom plate, the reinforcing plate and the connecting plate close to the ship-shaped plate are respectively provided with a connecting boss, the ship-shaped plate is concave and is provided with a connecting groove corresponding to the bottom plate and the connecting plate, before welding, the bottom plate and the two connecting plates are respectively fixed on the corresponding bottom plate clamp and connecting plate clamp through a manual or mechanical hand automatic device, then the two ship-shaped plates are arranged on the ship-shaped plate clamp, the two ship-shaped plate clamps slide relative to each other, the connecting bosses at the two ends of the bottom plate and the connecting plate are respectively inserted into the connecting grooves of the ship-shaped plate, the assembly between the bottom plate, the connecting plate and the ship-shaped plate is completed, then the welding head of the external welding device is used to weld the connecting boss to the corresponding connecting groove, the corresponding ship-shaped plate is released by the ship-shaped plate clamp and is reset, the corresponding bottom plate and connecting plate are released by the bottom plate clamp and the connecting plate clamp, the ship-shaped plate with the welded bottom plate and connecting plate is transferred to the second positioning jig, the support clamp and the reinforcing plate clamp are used to fix the bottom plate and the pre-positioned reinforcing plate, and the welding head of the external welding device is used to weld the reinforcing plate to the corresponding ship-shaped plate; a plurality of error-proof switches are arranged on the workbench to avoid missing parts and the like; the welding tool structure of the special-shaped metal piece is simple, the ship-shaped plate clamp is accurately assembled to the two ends of the bottom plate and the connecting plate through sliding, the first positioning jig and the second positioning jig are arranged on the same workbench at the same time, the step-by-step welding of the special-shaped metal piece is facilitated, the possibility of missing welding is reduced, and the welding precision is improved.

[0030] Exemplarily, as shown in Figure 1 , Figure 2 and Figure 4 , the bottom plate clamp 5 comprises a first positioning seat 51 arranged on the workbench, the top surface of the first positioning seat 51 is provided with a first positioning pin 511 and a first positioning block 512 corresponding to the bottom plate 2, a cylinder cavity is arranged in the first positioning seat 51, and a rotary pressing cylinder 52 is arranged in the first positioning seat 51, the piston rod of the rotary pressing cylinder 52 is connected with a rotary pressing block 53 corresponding to the bottom plate 2.

[0031] The technical scheme is characterized in that the first positioning seat is fixed to the top surface of the workbench through conventional bolts, the top surface is provided with a first positioning pin and a first positioning block corresponding to the bottom plate, the positions and sizes of the first positioning pin and the first positioning block are determined according to the holes and the groove in the bottom plate, a rotary pressing cylinder is selected from existing rotary clamping cylinders, and is mounted in the cylinder cavity through conventional bolts, a through groove is formed in the side wall of the cylinder cavity to facilitate adjustment of the adjusting valve and the magnetic switch of the cylinder, the piston rod of the rotary pressing cylinder is slidably penetrated through the top end of the first positioning seat and is connected with a rotary pressing block through conventional bolts, before the bottom plate is mounted, the piston rod of the rotary pressing cylinder is in an extended state, and the rotary pressing block is parallel to the groove in the bottom plate, after the bottom plate is placed on the top surface of the first positioning seat, the piston rod of the rotary pressing cylinder is retracted, the rotary pressing block is rotated and lowered, and is pressed against the top surface of the bottom plate, the rotary pressing block and the groove in the bottom plate form a 90° angle, and the stability of the bottom plate is improved.

[0032] As shown in Figure 4 As shown in

[0033] In the technical scheme, the mounting block is mounted on the corresponding outer wall of the first positioning seat through conventional bolts and cylindrical pins, and the two support blocks are mounted on the two side surfaces of the mounting block close to the boat-shaped plate through conventional bolts and cylindrical pins, respectively. The support block provides support for the boat-shaped plate, reduces the possibility of deformation of the boat-shaped plate, the adjusting pad is in a sheet structure and is processed with an open U-shaped groove, and can also be made into multiple specifications similar to a depth gauge with different thicknesses. A plurality of pieces are matched to meet the needs of different thickness adjustments. When disassembling, the corresponding bolts are loosened. The relative positions of the support block and the corresponding boat-shaped plate are adjusted by adjusting the adjusting pad, that is, the support position of the boat-shaped plate is adjusted to avoid interference.

[0034] As shown in Figure 1 , Figure 2 and Figure 5 As shown in

[0035] The technical scheme is characterized in that the first mounting base comprises a first L-shaped block, a second L-shaped block and a third L-shaped block connected in sequence, the first L-shaped block is fixed to the top surface of the workbench by means of bolts, the second L-shaped block is fixed to the first L-shaped block by means of bolts, the third L-shaped block is fixed to the second L-shaped block by means of bolts, a plurality of adjusting washers are arranged between the first L-shaped block and the workbench and the second L-shaped block and the third L-shaped block respectively to adjust the fixed position of the connecting plate placing block, that is, to adjust the position of the connecting plate, improve the matching precision between the connecting plate and the boat-shaped plate, the first mounting plate is fixed to the top end of the third L-shaped block by means of bolts, the angle of the inclined plate is determined according to the inclination angle of the connecting plate relative to the boat-shaped plate, the piston rod of the connecting plate pressing cylinder is perpendicular to the inclined plate after the connecting plate is placed in the step of the inclined plate, the piston rod of the connecting plate pressing cylinder is extended, and the nut on the end of the piston rod holds the connecting plate against the surface of the inclined plate, in addition, the nut on the end of the piston rod of the connecting plate pressing cylinder can also be arranged at a distance of 1-2 mm from the connecting plate after the piston rod is extended, that is, the connecting plate can be arranged to slide along the inclined surface and be positioned by the clamping of the two boat-shaped plates, thereby reducing the positioning difficulty of the connecting plate.

[0036] Exemplarily, referring to Fig. 1, Figures 1 to 3 As shown in Fig. 1, the boat-shaped plate clamp 7 comprises a second mounting plate 71 sliding on the workbench and a clamping device 72 arranged on the second mounting plate 71, and the clamping device 72 comprises a first top block 721 abutting against the outer wall of the boat-shaped plate 1 (the side wall away from the bottom plate) and a first pressing strip 722 movably abutting against the outer wall of the boat-shaped plate 1.

[0037] In the technical scheme, after the two ends of the boat-shaped plate are positioned and clamped by the clamping devices at the two ends of the second mounting plate and then slide with the second mounting plate to the side close to the bottom plate, the positioning and insertion with the bottom plate and the connecting plate are completed.

[0038] Exemplarily, referring to Fig. 1, Figure 3 As shown in Fig. 1, the first top block 721 is arranged on the second mounting plate 71 through a third mounting base 723, the side surface of the first top block 721 close to the boat-shaped plate 1 is provided with a second positioning pin 724 corresponding to the boat-shaped plate 1, and the first pressing strip 722 is provided with an avoiding hole or avoiding groove corresponding to the second positioning pin 724.

[0039] In the technical scheme, the structure of the third mounting base is similar to that of the first mounting base, and the mounting position of the first top block can be adjusted by adjusting washers to adjust the mounting position of the boat-shaped plate, the second positioning pin is a conventional cylindrical pin / conical pin and is installed by means of conventional bolts, and the position and number of the second positioning pin are determined according to the hole / nut in the boat-shaped plate, and the first pressing strip holds the boat-shaped plate against the first top block.

[0040] Exemplarily, referring to Fig. 1, Figure 3As shown, one end of the first pressing strip 722 is hinged to the clamping cylinder 725, the clamping cylinder 725 is arranged on the second mounting plate 71 through the fourth mounting seat 726, the clamping cylinder 725 is provided with a support 726 near one side of the boat-shaped plate 1, and is hinged to the first pressing strip 722 through the connecting rod 727.

[0041] In the technical scheme, the clamping cylinder is a conventional cylinder and is mounted on the fourth mounting seat through bolts, and the piston rod of the clamping cylinder is retracted and extended to cooperate with the connecting rod to realize the opening (to release the boat-shaped plate) and closing (to clamp the boat-shaped plate between the first pressing strip and the first top block) between the first pressing strip and the first top block.

[0042] Exemplarily, referring to Figures 1 to 3 As shown, the second mounting plate 71 is slidingly arranged on the workbench through the guide rail 73, and one end of the second mounting plate 71 away from the boat-shaped plate 1 is connected with a driving cylinder 74, the second mounting plate 71 is provided with a second top block 75 and a positioning top block 76 corresponding to the boat-shaped plate 1 on the side close to the boat-shaped plate 1, and the positioning top block 76 is provided with a third positioning pin 761 corresponding to the boat-shaped plate 1 on the side close to the boat-shaped plate 1.

[0043] In the technical scheme, the guide rail is a conventional linear guide rail and is mounted on the top surface of the workbench through a mounting seat, the second mounting plate is connected with the sliding block of the guide rail through threads, the moving precision of the second mounting plate is improved, the driving cylinder is mounted on the top surface of the workbench through a conventional cylinder seat, the end of the piston rod of the driving cylinder is connected with the second mounting plate through a conventional connector, the second mounting plate is driven to reciprocatingly move along the guide rail, the second top block and the positioning top block are mounted on the second mounting plate through structures similar to the first mounting seat, the second top block and the positioning top block abut against the outer wall of the boat-shaped plate to provide support for the boat-shaped plate and reduce the possibility of deformation of the boat-shaped plate, and the positioning top block is provided with a third positioning pin corresponding to the boat-shaped plate on the side close to the boat-shaped plate to improve the positioning precision of the boat-shaped plate.

[0044] Exemplarily, referring to Figure 1 , Figures 6 and 7 As shown, the support clamp 8 includes a second positioning seat 81 corresponding to the bottom plate 2 and a second pressing strip 82 movably abutting against the top surface of the bottom plate 2, and the second pressing strip 82 is provided with a first elbow avoiding the boat-shaped plate 1.

[0045] In the technical scheme, the second positioning seat is fixed to the top surface of the workbench through a conventional bolt, the top surface is provided with a fifth positioning pin and a second positioning block corresponding to the bottom plate, the positions and sizes of the fifth positioning pin and the second positioning block are determined according to the holes and the groove in the bottom plate, the connecting plate and the bottom plate are welded to the ship-shaped plate, the connecting plate and the ship-shaped plate can be fixed by fixing the bottom plate, the driving structure of the second pressing strip is the same as that of the first pressing strip, except that the second pressing strip is a hook structure, that is, the end close to the ship-shaped plate is provided with a first bend avoiding the ship-shaped plate, so as to avoid the interference between the second pressing strip and the ship-shaped plate, and the second mounting plate is further provided with a supporting rod on the side away from the reinforcing plate clamp, so as to improve the stability of the ship-shaped plate.

[0046] Exemplarily, referring to FIGS. 1 to 8, Figure 1 、 Figures 6 to 8 The reinforcing plate clamp 9 includes a third positioning seat 91 corresponding to the reinforcing plate 3 and a third pressing strip 92 movably abutting against the top surface of the reinforcing plate 3, the top end of the third positioning seat 91 is provided with an inclined groove, the inclined groove is provided with a fourth positioning pin 911 corresponding to the reinforcing plate 3, and the third pressing strip 92 is provided with a second bend avoiding the corresponding connecting plate 4.

[0047] In the technical scheme, the third positioning seat is installed on the top surface of the workbench through a structure similar to the first mounting seat, the fourth positioning pin is installed in the inclined groove through a conventional threaded connection or interference fit and corresponds to the hole in the reinforcing plate, and the reinforcing plate is fixed by cooperating with the third pressing strip, the driving structure of the third pressing strip is the same as that of the first pressing strip, and the third pressing strip is a hook structure, that is, the end close to the reinforcing plate is provided with a second bend avoiding the connecting plate, so as to avoid the interference between the third pressing strip and the connecting plate.

[0048] In summary, the welding tool structure of the special-shaped metal piece is simple, the ship-shaped plate clamp is slidably arranged to accurately assemble the ship-shaped plate to the two ends of the bottom plate and the connecting plate, the first positioning jig and the second positioning jig are simultaneously arranged on the same workbench, the step-by-step welding of the special-shaped metal piece is facilitated, the possibility of missing welding is reduced, and the welding precision is improved.

[0049] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0050] The above merely describes the specific embodiments of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A welding tool for special-shaped metal parts, characterized in that: It includes a horizontally arranged workbench and a first positioning jig and a second positioning jig respectively arranged at the top of the workbench, and the first positioning jig and the second positioning jig are used to weld special-shaped metal parts in steps, wherein the special-shaped metal parts include two relatively arranged ship-shaped plates, a bottom plate arranged between the two ship-shaped plates, a reinforcement plate and two connecting plates, wherein the two sides of the bottom plate and the two connecting plates are respectively plugged into and welded to the corresponding ship-shaped plates, and the two ends of the top surface of the reinforcement plate are respectively welded to the bottom surface of the corresponding ship-shaped plates, the first positioning jig includes a bottom plate clamp, connecting plate clamps respectively arranged at both ends of the bottom plate clamp, and ship-shaped plate clamps respectively slidably arranged on both sides of the bottom plate clamp and the connecting plate clamp, and the second positioning jig includes a support clamp and a reinforcement plate clamp.

2. The welding tool for special-shaped metal parts according to claim 1, characterized in that: The base plate clamp includes a first positioning seat arranged on the workbench, the top surface of the first positioning seat is provided with a first positioning pin and a first positioning block corresponding to the base plate, a cylinder cavity is provided in the first positioning seat, and a rotary pressing cylinder is provided, and the piston rod of the rotary pressing cylinder is connected to the rotary pressing block corresponding to the base plate.

3. The welding tool for special-shaped metal parts according to claim 2, characterized in that: Support seats are respectively provided on both sides of the first positioning seat. The support seats include mounting blocks arranged on the side of the first positioning seat and support blocks respectively arranged on both sides of the mounting blocks. Several adjustment gaskets are respectively provided between the mounting blocks and the first positioning seat and the support blocks.

4. The welding tool for special-shaped metal parts according to claim 1, characterized in that: The connecting plate clamp includes a connecting plate placement block and a connecting plate clamping cylinder which are respectively arranged on the workbench through a first mounting seat and a second mounting seat. The connecting plate placement block includes a first mounting plate connected to the first mounting seat and an inclined plate arranged at an obtuse angle to the first mounting plate. A step corresponding to the connecting plate is arranged in the inclined plate, and the piston rod of the connecting plate clamping cylinder is arranged perpendicular to the inclined plate.

5. The welding tool for special-shaped metal parts according to claim 1, characterized in that: The ship-shaped plate clamp includes a second mounting plate sliding on the workbench and a clamping device arranged on the second mounting plate, and the clamping device includes a first top block abutting against the outer wall of the ship-shaped plate and a first pressure strip movably abutting against the outer wall of the ship-shaped plate.

6. The welding tool for special-shaped metal parts according to claim 5, characterized in that: The first top block is arranged on the second mounting plate through the third mounting seat, and the side of the first top block close to the ship-shaped plate is provided with a second positioning pin corresponding to the ship-shaped plate, and the first pressure strip is provided with an avoidance hole or avoidance groove corresponding to the second positioning pin.

7. The welding tool for special-shaped metal parts according to claim 5, characterized in that: One end of the first pressure strip is hinged to the clamping cylinder, and the clamping cylinder is set on the second mounting plate through the fourth mounting seat. A bracket is set on the side of the clamping cylinder close to the ship-shaped plate and is hinged to the first pressure strip through a connecting rod.

8. The welding tool for special-shaped metal parts according to claim 5, characterized in that: The second mounting plate is slidably set on the workbench through a guide rail, and its end facing away from the ship-shaped plate is connected to a driving cylinder. The second mounting plate is provided with a second top block and a positioning top block corresponding to the ship-shaped plate on the side close to the ship-shaped plate, and the positioning top block is provided with a third positioning pin corresponding to the ship-shaped plate on the side close to the ship-shaped plate.

9. The welding tool for special-shaped metal parts according to claim 1, characterized in that: The supporting fixture includes a second positioning seat corresponding to the bottom plate and a second pressure strip movably supported on the top surface of the bottom plate, and the second pressure strip is provided with a first elbow to avoid the ship-shaped plate.

10. The welding tool for special-shaped metal parts according to claim 1, characterized in that: The reinforcing plate clamp includes a third positioning seat corresponding to the reinforcing plate and a third pressure strip movably supported on the top surface of the reinforcing plate, the top of the third positioning seat is provided with an inclined groove, the inclined groove is provided with a fourth positioning pin corresponding to the reinforcing plate, and the third pressure strip is provided with a second elbow to avoid the corresponding connecting plate.

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