Arc welding clamp for instrument tubular beams of multiple vehicle types

Abstract

The invention discloses a multi-vehicle-type instrument tubular beam arc welding clamp which comprises a base control assembly and a multi-vehicle-type instrument tubular beam body, a first set of output ends of the base control assembly are provided with first clamping parts assembled through bolts, and a second set of output ends of the base control assembly are provided with second clamping parts assembled through bolts. According to the device, a first clamping part, a second clamping part, a third clamping part and a fourth clamping part which are connected and mounted through bolts at the top end of a base control assembly are matched with one another to machine a multi-vehicle-type instrument pipe beam body to be machined, so that a production line can be effectively and rapidly transformed; the fixture is compatible with future vehicle types, investment cost is reduced through collinear production of vehicle enterprises, repeated design and hardware replacement cost are reduced, the same platform has the function of machining multiple vehicle types such as fuel vehicles, hybrid vehicles and pure electric vehicles, the effect of rapid switching is achieved, and the machining efficiency of equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of welding fixtures for multiple vehicle models, and in particular to an arc welding fixture for instrument tube beams of multiple vehicle models. Background Technology

[0002] Welding fixtures are specialized equipment that use mechanical structures to constrain welded workpieces. Their core function is to achieve precise positioning and stable clamping of the workpiece during the welding process, thereby effectively controlling welding deformation. Depending on the industrial application scenario, welding fixtures can be divided into pipe welding fixtures, automotive parts fixtures, sheet metal anti-warping fixtures, etc. Modern welding fixtures generally adopt a modular design, including three core modules: clamping components, transmission mechanisms, and positioning devices. They achieve precise control of clamping force through technologies such as gear and tooth plate meshing and hydraulic drive.

[0003] The technical background of existing arc welding fixtures, particularly multi-model welding fixtures, stems from the growing demand in the automotive industry for flexible, efficient, and intelligent production. With increasing market demand for personalization and the rapid development of new energy vehicles, traditional single-model welding production lines can no longer meet the needs of multi-variety, small-batch production. However, existing multi-model welding fixtures, while supporting 3-10 models on a single production line (through module switching), are only compatible with a single model. Changing models requires redesigning the fixture, with switching times ranging from minutes (e.g., 5-15 minutes, depending on automation) to hours or days (requiring hardware disassembly / installation). Production line modifications are primarily software-based, with minimal physical modifications requiring production stoppages and fixture replacements, resulting in long modification cycles. Multi-model fixtures, on the other hand, achieve "one machine for multiple uses," making them particularly suitable for new energy vehicle manufacturers with rapid production needs. To meet the demands of rapid iteration of new vehicle models, multi-model welding fixtures offer several advantages. Traditional single-model welding fixtures have high initial investment (modular design, servo system, etc., increasing costs by 30%-50%), low initial investment (simple structure), and significantly lower long-term costs (reducing duplicate fixture purchases and production line reuse). However, they also have high maintenance costs (requiring separate investment for each new model) and low maintenance costs (requiring regular servo system calibration). Multi-model welding fixtures, on the other hand, have low OEE (Overall Equipment Efficiency) of 85%-95% (reduced changeover downtime) and 60%-75% (efficiency loss due to frequent changeovers). Changeover losses are less than 1%, and capacity losses can reach 10%-20% (depending on changeover frequency). Their batch flexibility supports mixed-flow production from a single unit and is only suitable for large-volume single-model production. Therefore, we propose a multi-model instrument panel beam arc welding fixture to address these issues. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a multi-vehicle instrument tube beam arc welding fixture. This fixture primarily utilizes the cooperation of a first clamping component, a second clamping component, a third clamping component, and a fourth clamping component bolted to the top of the base control assembly to process the instrument tube beam body of multiple vehicle models. This allows for effective and rapid production line modification, and the fixture achieves compatibility with future vehicle models. Automakers can reduce investment costs and minimize the costs of repetitive design and hardware replacement through co-line production. It enables the same platform to generate processing functions for multiple vehicle models, including fuel vehicles, hybrid vehicles, and pure electric vehicles, and also provides a rapid switching capability, improving the processing efficiency of the equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A multi-vehicle instrument tube beam arc welding fixture includes a base control assembly and a multi-vehicle instrument tube beam body. The first set of output ends of the base control assembly is provided with a bolt-assembled first clamping component, the second set of output ends of the base control assembly is provided with a bolt-assembled second clamping component, the third set of output ends of the base control assembly is provided with a bolt-assembled third clamping component, and the fourth set of output ends of the base control assembly is provided with a bolt-assembled fourth clamping component. The multi-vehicle instrument tube beam body is clamped by the cooperation of the first clamping component, the second clamping component, the third clamping component, and the fourth clamping component.

[0006] As a further technical solution, the base control assembly includes a pad, a bolt hole base plate, side plates, a lifting ring, a protective plate, and a control panel. The bolt hole base plate is disposed above the pad, and side plates are disposed at both ends of the bolt hole base plate. A lifting ring is disposed above the side plates. A protective plate is disposed at one front end of the bolt hole base plate, and a control panel is disposed above the protective plate.

[0007] As a further technical solution, the first clamping component includes a first base, an end hinge frame, a hinge hydraulic cylinder, a front clamp, a first transverse cylinder, a first bonding plate, a lifting cylinder, a mounting cylinder, and a limiting block. The first base is bolted to the top of the first group of bolt hole base plates. An end hinge frame is provided above one end of the first base, and the output end of the hinge hydraulic cylinder is provided on one side above the end hinge frame. A front clamp is provided on the other side above the end hinge frame. A first transverse cylinder is provided above the other end of the first base, and the output end of the first transverse cylinder is provided with a first bonding plate.

[0008] As a further technical solution, a lifting cylinder is provided on one side below the first base, and a sleeve cylinder is provided at the output end of the lifting cylinder, and a limit block is provided at the output end of the sleeve cylinder.

[0009] As a further technical solution, the second clamping component includes a second base, a second hydraulic cylinder, an upper hinged base, a pressure bar, a tilting frame, a tilting cylinder, a third base, a vertical frame, a third hydraulic cylinder, and a second bonding plate. The second base is bolted to the upper part of the second set of bolt hole base plates. The second hydraulic cylinder is provided on the upper side of the second base, and the output end of the second hydraulic cylinder is provided with the upper hinged base. One end of the upper hinged base is provided with a pressure bar. The tilting frame is provided on the lower side of the second base, and the tilting cylinder is provided on one side of the tilting frame.

[0010] As a further technical solution, a third base is provided on the other side below the second base, and a vertical frame is provided above the third base. A third hydraulic cylinder is provided above the vertical frame, and a second bonding plate is provided at the output end of the third hydraulic cylinder.

[0011] As a further technical solution, the third clamping component includes a fourth base, an inclined vertical bracket, a top limiting block, an end hydraulic cylinder, a third bonding disc, an auxiliary cylinder, and a symmetrical frame. The fourth base is bolted to the third group above the bolt hole base plate. An inclined vertical bracket is provided above the side of the fourth base, and a top limiting block is provided on one side above the inclined vertical bracket. An end hydraulic cylinder is provided on the other side above the inclined vertical bracket, and a third bonding disc is provided at the output end of the end hydraulic cylinder.

[0012] As a further technical solution, an auxiliary cylinder is provided on the outside of the third bonding disc, and a symmetrical frame is provided at one lower end of the fourth base.

[0013] As a further technical solution, the fourth clamping component includes a fifth base, a central end frame, an end base hydraulic cylinder, and a locking limit strip. The fifth base is bolted to the fourth group above the bolt hole base plate. A central end frame is provided above the side of the fifth base, and an end base hydraulic cylinder is provided on the side of the central end frame. The output end of the end base hydraulic cylinder is provided with a locking limit strip.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention mainly utilizes the cooperation of a first clamping component, a second clamping component, a third clamping component, and a fourth clamping component bolted to the top of the base control assembly to process the instrument tube beam body of multiple vehicle models. This allows for effective and rapid modification of the production line, and the fixture is compatible with future vehicle models. Automakers can reduce investment costs and the costs of repeated design and hardware replacement through co-line production. This enables the same platform to generate processing functions for multiple vehicle models such as fuel vehicles, hybrid vehicles, and pure electric vehicles, and has the effect of rapid switching, improving the processing efficiency of the equipment. Attached Figure Description

[0015] Figure 1 A schematic diagram of a multi-vehicle instrument tube beam arc welding fixture; Figure 2 This is a schematic diagram of the base control component in this invention; Figure 3 This is a schematic diagram of the structure of the first clamping component in this invention; Figure 4 This is a schematic diagram of the structure of the second clamping component in this invention; Figure 5 This is a schematic diagram of the structure of the third clamping component in this invention; Figure 6 This is a schematic diagram of the structure of the fourth clamping component in this invention; Figure 7 This is a schematic diagram of the structure of the instrument tube beam body for multiple vehicle models in this invention.

[0016] In the diagram: 1. Base control assembly; 101. Pad; 102. Bolt hole base plate; 103. Side plate; 104. Lifting ring; 105. Protective plate; 106. Control panel; 2. First clamping component; 201. First base; 202. End hinge frame; 203. Hinge hydraulic cylinder; 204. Front clamp; 205. First transverse cylinder; 206. First bonding plate; 207. Lifting cylinder; 208. Set cylinder; 209. Limit block; 3. Second clamping component; 301. Second base; 302. Second hydraulic cylinder; 303. Upper hinge base; 3 04. Holding bar; 305. Inclined frame; 306. Inclined cylinder; 307. Third base; 308. Vertical frame; 309. Third hydraulic cylinder; 3010. Second bonding plate; 4. Third clamping component; 401. Fourth base; 402. Inclined vertical frame; 403. Top limiting block; 404. End hydraulic cylinder; 405. Third bonding plate; 406. Auxiliary cylinder; 407. Symmetrical frame; 5. Fourth clamping component; 501. Fifth base; 502. Center end frame; 503. End base hydraulic cylinder; 504. Engaging limiting bar; 6. Multi-model instrument tube beam body. Detailed Implementation

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-7 In this embodiment of the invention, a multi-vehicle instrument tube beam arc welding fixture includes a base control component 1 and a multi-vehicle instrument tube beam body 6. The first set of output ends of the base control component 1 is provided with a bolt-assembled first clamping component 2, the second set of output ends of the base control component 1 is provided with a bolt-assembled second clamping component 3, the third set of output ends of the base control component 1 is provided with a bolt-assembled third clamping component 4, and the fourth set of output ends of the base control component 1 is provided with a bolt-assembled fourth clamping component 5. The multi-vehicle instrument tube beam body 6 is clamped by the cooperation of the first clamping component 2, the second clamping component 3, the third clamping component 4, and the fourth clamping component 5.

[0021] The base control assembly 1 includes a pad 101, a bolt hole base plate 102, a side plate 103, a lifting ring 104, a protective plate 105, and a control panel 106. The bolt hole base plate 102 is provided above the pad 101, and the side plates 103 are provided at both ends of the bolt hole base plate 102. The lifting ring 104 is provided above the side plates 103. The protective plate 105 is provided at one end of the front side of the bolt hole base plate 102, and the control panel 106 is provided above the protective plate 105.

[0022] In an embodiment of the present invention, during use, the bolt hole base plate 102 is hoisted onto the pad block 101 for support by the hoisting ring 104 on the side plate 103, so that the various components are assembled and spliced ​​on the top of the bolt hole base plate 102 in sequence, and the control panel 106 on the top of the protective plate 105 is used to effectively control the equipment.

[0023] The first clamping component 2 includes a first base 201, an end hinge frame 202, a hinge hydraulic cylinder 203, a front clamp 204, a first transverse cylinder 205, a first bonding plate 206, a lifting cylinder 207, a mounting cylinder 208, and a limiting block 209. The first base 201 is bolted to the top of the first group of bolt hole base plate 102. An end hinge frame 202 is provided above one end of the first base 201, and the output end of the hinge hydraulic cylinder 203 is provided on one side above the end hinge frame 202. A front clamp 204 is provided on the other side above the end hinge frame 202. A first transverse cylinder 205 is provided above the other end of the first base 201, and the first bonding plate 206 is provided at the output end of the first transverse cylinder 205.

[0024] In an embodiment of the present invention, when clamping is required, the multi-model instrument tube beam body 6 is hoisted and then moved onto the equipment. The articulated hydraulic cylinder 203 outputs power to drive the output end to run, so that the front clamp 204 on the other side above the end articulated frame 202 cooperates with the first transverse cylinder 205 to output power to drive the output end to run, so that the first contact plate 206 clamps and positions the multi-model instrument tube beam body 6.

[0025] A lifting cylinder 207 is provided on one side below the first base 201, and a sleeve cylinder 208 is provided at the output end of the lifting cylinder 207, and a limit block 209 is provided at the output end of the sleeve cylinder 208.

[0026] In an embodiment of the present invention, the lifting cylinder 207 on one side below the first base 201 then outputs power to drive the output end to run, so that the limiting block 209 at the output end of the sleeve cylinder 208 clamps the product.

[0027] The second clamping component 3 includes a second base 301, a second hydraulic cylinder 302, an upper hinge base 303, a pressure bar 304, a tilting frame 305, a tilting cylinder 306, a third base 307, a vertical frame 308, a third hydraulic cylinder 309, and a second bonding disc 3010. The second base 301 is bolted to the upper part of the second group of bolt hole base plate 102. The second hydraulic cylinder 302 is provided on the upper side of the second base 301, and the output end of the second hydraulic cylinder 302 is provided with the upper hinge base 303. One end of the upper hinge base 303 is provided with the pressure bar 304. The tilting frame 305 is provided on the lower side of the second base 301, and the tilting cylinder 306 is provided on one side of the tilting frame 305.

[0028] In an embodiment of the present invention, the second hydraulic cylinder 302 on the second base 301 then outputs power to drive the output end to run, so that after the upper hinged base 303 outputs power, the holding bar 304 cooperates with the upper tilting cylinder 306 to allow the tilting frame 305 to clamp and position the multi-model instrument tube beam body 6.

[0029] A third base 307 is provided on the other side below the second base 301, and a vertical frame 308 is provided above the third base 307. A third hydraulic cylinder 309 is provided above the vertical frame 308, and a second bonding plate 3010 is provided at the output end of the third hydraulic cylinder 309.

[0030] In an embodiment of the present invention, the third hydraulic cylinder 309 above the vertical frame 308 is then used to output power to drive the output end to run, so that the second bonding plate 3010 clamps and positions the multi-model instrument tube beam body 6.

[0031] The third clamping component 4 includes a fourth base 401, an inclined hanging bracket 402, a top limiting block 403, an end hydraulic cylinder 404, a third bonding plate 405, an auxiliary cylinder 406, and a symmetrical frame 407. The fourth base 401 is bolted to the upper part of the third group of bolt hole base plate 102. An inclined hanging bracket 402 is provided on the upper side of the fourth base 401, and a top limiting block 403 is provided on one side above the inclined hanging bracket 402. An end hydraulic cylinder 404 is provided on the other side above the inclined hanging bracket 402, and a third bonding plate 405 is provided at the output end of the end hydraulic cylinder 404.

[0032] In an embodiment of the present invention, the hydraulic cylinder 404 on the inclined vertical bracket 402 then outputs power to drive the output end to run, so that the third bonding disc 405 clamps and positions the instrument tube beam body 6 of the multi-model vehicle.

[0033] An auxiliary cylinder 406 is provided on the outside of the third bonding plate 405, and a symmetrical frame 407 is provided at one end of the lower part of the fourth base 401.

[0034] In an embodiment of the present invention, the auxiliary cylinder 406 is then used to output and operate, causing the symmetrical frame 407 to clamp and position the instrument tube beam body 6 of the multi-model vehicle.

[0035] The fourth clamping component 5 includes a fifth base 501, a central end frame 502, an end base hydraulic cylinder 503, and a locking limit strip 504. The fifth base 501 is bolted to the fourth group above the bolt hole base plate 102. The central end frame 502 is provided on the upper side of the fifth base 501, and the end base hydraulic cylinder 503 is provided on the side of the central end frame 502. The locking limit strip 504 is provided at the output end of the end base hydraulic cylinder 503.

[0036] In an embodiment of the present invention, the end base hydraulic cylinder 503 and the locking limit bar 504 on one side of the center end frame 502 are used to clamp and position the instrument tube beam body 6 of multiple models after the output is running, thereby facilitating the user to perform welding processing.

[0037] The working principle of this invention is as follows: In use, the bolt hole base plate 102 is hoisted onto the pad block 101 for support by the hoisting ring 104 on the side plate 103, so that the various components are assembled and spliced ​​on the bolt hole base plate 102 in sequence. The control panel 106 on the protective plate 105 is used to effectively control the equipment. When clamping is required, the multi-model instrument tube beam body 6 is hoisted and moved onto the equipment. The articulated hydraulic cylinder 203 outputs power to drive the output end, so that the front clamp 204 on the other side above the end articulation frame 202, in conjunction with the first transverse cylinder 205, outputs power to drive the output end, so that the first bonding plate 206 clamps and positions the multi-model instrument tube beam body 6. Then, the lifting cylinder 207 on the lower side of the first base 201 outputs power to drive the output end, so that the limiting block 209 at the output end of the set cylinder 208 clamps the product. The second hydraulic cylinder 302 on the second base 301 outputs power to drive the output end, so that after the upper hinge base 303 outputs power, the holding bar 304, in conjunction with the tilting cylinder 306, causes the tilting frame 305 to clamp and position the multi-model instrument tube beam body 6. Then, the third hydraulic cylinder 309 above the vertical frame 308 outputs power to drive the output end, so that the second bonding plate 3010 clamps and positions the multi-model instrument tube beam body 6. Next, the end hydraulic cylinder 404 on the tilting vertical frame 402 outputs power to drive the output end, so that the third bonding plate 405 clamps and positions the multi-model instrument tube beam body 6. Then, the auxiliary cylinder 406 outputs power to cause the symmetrical frame 407 to clamp and position the multi-model instrument tube beam body 6. Finally, the end base hydraulic cylinder 503 and the locking limit bar 504 on one side of the central end frame 502 output power to clamp and position the multi-model instrument tube beam body 6, thus facilitating welding processing by the user.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-vehicle instrument tube beam arc welding fixture, comprising a base control assembly (1) and a multi-vehicle instrument tube beam body (6), characterized in that: The first set of output ends of the base control component (1) is provided with a bolt-assembled first clamping component (2), the second set of output ends of the base control component (1) is provided with a bolt-assembled second clamping component (3), the third set of output ends of the base control component (1) is provided with a bolt-assembled third clamping component (4), and the fourth set of output ends of the base control component (1) is provided with a bolt-assembled fourth clamping component (5). The first clamping component (2), the second clamping component (3), the third clamping component (4), and the fourth clamping component (5) cooperate to clamp the instrument tube beam body (6) of multiple vehicle models.

2. The multi-vehicle instrument tube beam arc welding fixture according to claim 1, characterized in that: The base control assembly (1) includes a pad (101), a bolt hole base plate (102), a side plate (103), a lifting ring (104), a protective plate (105), and a control panel (106). The bolt hole base plate (102) is provided above the pad (101), and the two ends of the bolt hole base plate (102) are provided with side plates (103). The lifting ring (104) is provided above the side plate (103). The protective plate (105) is provided at one end of the front side of the bolt hole base plate (102), and the control panel (106) is provided above the protective plate (105).

3. The multi-vehicle instrument tube beam arc welding fixture according to claim 2, characterized in that: The first clamping component (2) includes a first base (201), an end hinge frame (202), a hinge hydraulic cylinder (203), a front clamp (204), a first transverse cylinder (205), a first bonding plate (206), a lifting cylinder (207), a mounting cylinder (208), and a limiting block (209). The first base (201) is bolted to the first group above the bolt hole base plate (102). An end hinge frame (202) is provided above one end of the first base (201), and the output end of the hinge hydraulic cylinder (203) is provided on one side above the end hinge frame (202). A front clamp (204) is provided on the other side above the end hinge frame (202). A first transverse cylinder (205) is provided above the other end of the first base (201), and the first bonding plate (206) is provided at the output end of the first transverse cylinder (205).

4. The multi-vehicle instrument tube beam arc welding fixture according to claim 3, characterized in that: A lifting cylinder (207) is provided on one side below the first base (201), and a sleeve cylinder (208) is provided at the output end of the lifting cylinder (207), and a limit block (209) is provided at the output end of the sleeve cylinder (208).

5. The multi-vehicle instrument tube beam arc welding fixture according to claim 2, characterized in that: The second clamping component (3) includes a second base (301), a second hydraulic cylinder (302), an upper hinge base (303), a pressure bar (304), a tilting frame (305), a tilting cylinder (306), a third base (307), a vertical frame (308), a third hydraulic cylinder (309), and a second bonding plate (3010). The second base (301) is bolted to the second group above the bolt hole base plate (102). The second hydraulic cylinder (302) is provided on the upper side of the second base (301), and the output end of the second hydraulic cylinder (302) is provided with an upper hinge base (303). One end of the upper hinge base (303) is provided with a pressure bar (304). The tilting frame (305) is provided on the lower side of the second base (301), and the tilting cylinder (306) is provided on one side of the tilting frame (305).

6. The multi-vehicle instrument tube beam arc welding fixture according to claim 5, characterized in that: A third base (307) is provided on the other side below the second base (301), and a vertical frame (308) is provided above the third base (307). A third hydraulic cylinder (309) is provided above the vertical frame (308), and a second bonding plate (3010) is provided at the output end of the third hydraulic cylinder (309).

7. The multi-vehicle instrument tube beam arc welding fixture according to claim 2, characterized in that: The third clamping component (4) includes a fourth base (401), an inclined vertical bracket (402), a top limiting block (403), an end hydraulic cylinder (404), a third bonding disc (405), an auxiliary cylinder (406), and a symmetrical frame (407). The fourth base (401) is bolted to the third group above the bolt hole base plate (102). An inclined vertical bracket (402) is provided on the side above the fourth base (401), and a top limiting block (403) is provided on one side above the inclined vertical bracket (402). An end hydraulic cylinder (404) is provided on the other side above the inclined vertical bracket (402), and a third bonding disc (405) is provided at the output end of the end hydraulic cylinder (404).

8. The multi-vehicle instrument tube beam arc welding fixture according to claim 7, characterized in that: An auxiliary cylinder (406) is provided on the outside of the third bonding plate (405), and a symmetrical frame (407) is provided at the lower end of the fourth base (401).

9. A multi-vehicle instrument tube beam arc welding fixture according to claim 2, characterized in that: The fourth clamping component (5) includes a fifth base (501), a central end frame (502), an end base hydraulic cylinder (503), and a locking limit strip (504). The fifth base (501) is bolted to the fourth group above the bolt hole base plate (102). The central end frame (502) is provided on the side of the fifth base (501), and the end base hydraulic cylinder (503) is provided on the side of the central end frame (502). The locking limit strip (504) is provided at the output end of the end base hydraulic cylinder (503).

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