Metal structure welding machine with stable clamping function

Abstract

The embodiment of the invention relates to the technical field of welding machines, and provides a metal structure welding machine with a stable clamping function, which comprises a welding mechanical arm, a welding bottom box, a welding positioning mechanism and a material supporting mechanism, the welding mechanical arm is installed on the welding bottom box, the number of the welding positioning mechanisms is two, the welding positioning mechanisms are symmetrically arranged on the welding bottom box, a clamping cavity is formed between the two welding positioning mechanisms, the material supporting mechanism is arranged on the welding bottom box, and the material supporting mechanism is arranged below the clamping cavity and can support a metal part to be welded. The welding positioning mechanism comprises a positioning frame, a butt joint position adjusting assembly, a turning assembly and a material clamping assembly. By means of the technical scheme, the problem that in the prior art, when a metal structure welding machine clamps a special-shaped metal piece, the positioning precision is low is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of welding machine technology, and more specifically, to a metal structure welding machine with a stable clamping function. Background Technology

[0002] In the field of metal processing, welding machines, as key equipment for connecting metal parts, are currently widely used in various metal structure processing scenarios. Metal structure welding machines typically include a frame, welding mechanism, clamping mechanism, and drive system. The frame serves as the basic support component, providing an installation platform for other components and ensuring the stability of the overall structure. The welding mechanism generally consists of a welding torch, a wire feeding device, and an adjustment component. The welding torch can move under the influence of the adjustment component to adapt to different welding positions. The wire feeding device continuously provides welding wire for the welding process. The clamping mechanism is the core for stable clamping and usually consists of two sets of opposing clamping arms. Clamping blocks are located at the ends of the clamping arms. The drive system (such as a cylinder, hydraulic cylinder, or motor with a lead screw structure) drives the clamping arms to move relative to each other, thereby clamping and fixing the metal parts. However, in actual processing, existing metal welding machines often encounter problems when welding irregularly shaped metal parts. Because these parts are not perfectly regular in shape, the existing clamping blocks are mostly fixed in position and move around, making it difficult for them to fully conform to the surface of the irregularly shaped parts. Operators often need to spend a significant amount of time adjusting the clamping position, and sometimes even need to add auxiliary pads to clamp the parts. This is not only time-consuming and labor-intensive, but also can affect welding accuracy due to unstable clamping. Furthermore, most existing metal welding machines lack angle adjustment functionality after clamping the irregularly shaped metal parts. To adjust the angle of the welded parts, the clamps must be loosened, manually adjusted, and then re-clamped. This is cumbersome, and repeated adjustments can increase the positioning error of the metal parts, further affecting the welding quality. Summary of the Invention

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a metal structure welding machine with stable clamping function, which solves the problem of low positioning accuracy in the prior art metal structure welding machine when clamping irregular metal parts, as mentioned in the background art.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a metal structure welding machine with a stable clamping function, including a welding robotic arm on which an automatic welding gun head is mounted, and also includes a welding base box, a welding positioning mechanism and a material support mechanism; The welding robotic arm is mounted on the welding base box; Two welding positioning mechanisms are provided, and the welding positioning mechanisms are symmetrically arranged on the welding base box, forming a clamping cavity between the two welding positioning mechanisms; The material support mechanism is installed on the welding base box and below the clamping cavity, and can support the metal parts to be welded. The welding positioning mechanism includes a positioning frame, a docking and adjusting assembly, a turning assembly, and a clamping assembly; The positioning frame is disposed on one side of the welded base box; The docking and positioning component is mounted on the positioning frame; The switching component is disposed at one end of the docking and positioning component; The clamping assembly is located on one side of the turning assembly and is capable of clamping irregularly shaped metal parts.

[0005] Based on the aforementioned scheme, the docking and positioning assembly includes a docking cylinder and a clamping cylinder; The docking cylinder is mounted on the positioning frame; The clamping cylinder is slidably disposed on one side of the docking cylinder through the clamping and adjusting component, and the adjusting component is disposed on one side of the clamping cylinder.

[0006] Furthermore, based on the aforementioned solution, the clamping and adjusting assembly includes an adjusting motor and an adjusting lead screw; The adjustment motor is installed on one side of the clamping cylinder; One end of the adjusting screw is located on the output end of the adjusting motor, and the other end extends into the clamping cylinder. An adjusting ball nut assembly is driven on the adjusting screw, and the adjusting ball nut assembly is connected to one end of the clamping cylinder.

[0007] Based on the aforementioned scheme, the turning assembly includes a turning box, a turning shaft, and a turning power unit; The turning box is located on one side of the clamping cylinder; The reversing shaft passes through and is rotatably disposed on the side of the reversing box away from the clamping cylinder, and the clamping assembly is disposed on one side of the reversing shaft; The turning power unit is located inside the turning box and is connected to the turning shaft.

[0008] Furthermore, based on the aforementioned scheme, the turning power unit includes a power worm gear, a power worm wheel, and a power motor; The power worm gear passes through and is rotatably mounted inside the turning box; The power worm gear is mounted on the rotating shaft and is connected to the power worm. The power motor is mounted on the rotating box, and the output end of the power motor is connected to one end of the power worm gear.

[0009] As a preferred technical solution of this disclosure, the clamping assembly includes a clamping frame and a clamping stabilizing part; The clamping frame is located on one side of the rotating shaft; The clamping and stabilizing parts are provided in two symmetrically arranged on the clamping frame.

[0010] Furthermore, based on the aforementioned solution, the clamping stabilizing unit includes a clamping cylinder, a clamping pressure sensor, a clamping block, and an auxiliary clamping assembly; The clamping cylinder is mounted on the clamping frame; The clamping pressure sensor is installed at the output end of the clamping cylinder; The clamping block is installed on the detection end of the clamping pressure sensor; The auxiliary clamping assembly is mounted on the clamping block and can clamp the irregularly shaped metal part at any position on one side.

[0011] Furthermore, based on the aforementioned solution, the auxiliary clamping assembly includes an auxiliary plate, an auxiliary adjusting cylinder, an auxiliary frame, and an auxiliary cylinder; The auxiliary plate is disposed on the clamping block; The auxiliary adjustment cylinder is mounted on the auxiliary plate; The auxiliary frame is mounted on the output end of the auxiliary adjustment cylinder; The auxiliary cylinder is provided in two symmetrical arrangements on the auxiliary frame, and each auxiliary cylinder has an auxiliary block at its output end.

[0012] Based on the aforementioned scheme, the material support mechanism includes a material support cylinder, a material support plate, and a material support slide bar; The material support cylinder is installed inside the welding base box; The support plate is disposed on the output end of the support cylinder; The material support slide rod is provided in several parts, and the material support slide rod passes through and slides on the welded base box, and one end of the material support slide rod is connected to the material support plate.

[0013] Furthermore, based on the aforementioned scheme, each of the clamping blocks and the auxiliary blocks is provided with several anti-slip pads.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this disclosure, the clamping cavity formed by two symmetrically arranged welding positioning mechanisms, together with the supporting mechanism below, can not only drive the clamping block to clamp the metal parts by the clamping cylinder in the clamping assembly, but also monitor the clamping force in real time by the clamping pressure sensor to avoid workpiece deformation due to excessive pressure or displacement caused by insufficient pressure, thus ensuring that the workpiece position remains stable during the welding process. Furthermore, the lifting and lowering of the supporting plate driven by the supporting cylinder can not only provide a stable support for the metal parts and facilitate the rapid fixing of the metal parts, but also effectively offset the vibration and impact force during welding, reduce welding deviation, and ensure the quality of the weld. 2. In this disclosure, by setting up a welding positioning mechanism, when welding and positioning irregularly shaped metal parts, the adjusting motor in the docking and adjusting assembly is activated, which drives the adjusting screw to rotate, thereby causing the clamping cylinder to slide along the docking cylinder. This causes the clamping block to move towards one side of the metal part. Then, a position where the irregularly shaped metal part is easy to clamp is determined. By activating the power motor, the output end of the power motor drives the power worm gear and power worm wheel transmission, which drives the adjusting shaft to rotate the clamping assembly flexibly. This allows the position of the clamping block on one side of the metal part to be adjusted. Then, by activating the clamping cylinder, the clamping block can clamp the irregularly shaped metal part. However, when the structure of the irregularly shaped metal part is more complex, it is impossible to clamp the irregularly shaped metal part. When clamping both sides, if positioning is only possible from one side of the irregularly shaped metal part, the clamping cylinder can be activated to move the clamping block. The clamping block then moves the auxiliary clamping assembly to the side of the metal part to be clamped. The auxiliary adjustment cylinder is activated to move the auxiliary frame, auxiliary cylinder, and auxiliary block towards one side of the metal part. The auxiliary cylinder is then activated to move the auxiliary block. The two relatively moving auxiliary blocks clamp one side of the metal part, thus clamping complex metal parts. This allows for stable clamping of irregularly shaped metal parts in complex locations from multiple angles and positions. This not only handles metal parts of conventional shapes but also meets the welding needs of various irregularly shaped structures, greatly expanding its application scenarios. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a metal structure welding machine with stable clamping function according to one embodiment of the present disclosure; Figure 2This is a partial cross-sectional schematic diagram of a metal structure welding machine with stable clamping function according to one embodiment of the present disclosure; Figure 3 For this disclosure Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 4 For this disclosure Figure 2 A magnified schematic diagram of the local structure at point B; Figure 5 This is a partial cross-sectional structural schematic diagram of the welding positioning mechanism in an embodiment of this disclosure; Figure 6 This is a schematic diagram of the auxiliary clamping assembly in an embodiment of this disclosure.

[0017] In the diagram: 001, material support mechanism; 002, docking and adjusting assembly; 003, turning assembly; 004, clamping assembly; 1. Welding robotic arm; 2. Automatic welding gun head; 3. Welding base box; 4. Positioning frame; 5. Docking cylinder; 6. Clamping cylinder; 7. Adjustment motor; 8. Adjustment screw; 9. Adjustment ball nut assembly; 10. Rotation box; 11. Rotation shaft; 12. Power worm gear; 13. Power worm wheel; 14. Power motor; 15. Clamping frame; 16. Clamping cylinder; 17. Clamping pressure sensor; 18. Clamping block; 19. Auxiliary plate; 20. Auxiliary adjustment cylinder; 21. Auxiliary frame; 22. Auxiliary cylinder; 23. Auxiliary block; 24. Support cylinder; 25. Support plate; 26. Support slide bar; 27. Anti-slip pad. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-6 As shown, it illustrates a metal structure welding machine with stable clamping function in one embodiment of the present disclosure, including a welding robotic arm 1, an automatic welding gun head 2 mounted on the welding robotic arm 1, a welding base box 3, a welding positioning mechanism and a material support mechanism 001, and the welding robotic arm 1 is mounted on the welding base box 3.

[0025] The automatic welding gun head 2 is used to perform automatic welding operations on metal parts, while the welding robotic arm 1 can be used to drive the automatic welding gun head 2 to adjust the angle and position of the metal parts on one side so as to perform automatic welding operations on the metal parts. The automatic welding gun head 2 and the welding robotic arm 1 are both commonly used equipment for welding metal parts in the prior art. The specific structure and welding method are not the main innovation of this disclosure and will not be described in detail here.

[0026] As described above, there are two welding positioning mechanisms, which are symmetrically arranged on the welding base box 3. A clamping cavity is formed between the two welding positioning mechanisms. The welding positioning mechanism includes a positioning frame 4, a docking adjustment component 002, a turning component 003, and a clamping component 004. The positioning frame 4 is located on one side of the welding base box 3, the docking adjustment component 002 is located on the positioning frame 4, the turning component 003 is located at one end of the docking adjustment component 002, and the clamping component 004 is located on one side of the turning component 003, which can clamp irregularly shaped metal parts.

[0027] The docking and adjusting assembly 002 includes a docking cylinder 5 and a clamping cylinder 6. The docking cylinder 5 is mounted on the positioning frame 4. The clamping cylinder 6 is slidably mounted on one side of the docking cylinder 5 through the clamping and adjusting assembly. The adjusting assembly 003 is mounted on one side of the clamping cylinder 6. The clamping and adjusting assembly includes an adjusting motor 7 and an adjusting screw 8. The adjusting motor 7 is mounted on one side of the clamping cylinder 6. One end of the adjusting screw 8 is mounted on the output end of the adjusting motor 7, and the other end passes through the clamping cylinder 6. An adjusting ball nut assembly 9 is driven on the adjusting screw 8 and is connected to one end of the clamping cylinder 6.

[0028] Specifically, when adjusting the position of the clamping cylinder 6, the adjusting motor 7 is started. The output end of the adjusting motor 7 can drive the adjusting screw 8 to rotate. The rotation of the adjusting screw 8 causes the adjusting ball nut group 9 to move linearly. The movement of the adjusting ball nut group 9 can drive the clamping cylinder 6 to move, thereby adjusting the position of the adjusting component 003.

[0029] The reversing assembly 003 includes a reversing box 10, a reversing shaft 11, and a reversing power unit. The reversing box 10 is located on one side of the clamping cylinder 6. The reversing shaft 11 passes through and is rotatably located on the side of the reversing box 10 away from the clamping cylinder 6. The clamping assembly 004 is located on one side of the reversing shaft 11. The reversing power unit is located inside the reversing box 10 and is connected to the reversing shaft 11. The reversing power unit includes a power worm gear 12, a power worm wheel 13, and a power motor 14. The power worm gear 12 passes through and is rotatably located inside the reversing box 10. The power worm wheel 13 is located on the reversing shaft 11 and is connected to the power worm gear 12. The power motor 14 is mounted on the reversing box 10, and the output end of the power motor 14 is connected to one end of the power worm gear 12.

[0030] Specifically, when adjusting the position of the clamping assembly 004, the power motor 14 is started. The output end of the power motor 14 can drive the power worm gear 12 to rotate. The rotation of the power worm gear 12 can drive the power worm wheel 13 to rotate. The rotation of the power worm wheel 13 can drive the adjusting shaft 11 to rotate. The rotation of the adjusting shaft 11 can drive the position of the clamping assembly 004 to be adjusted.

[0031] Through the meshing of the power worm gear 12 and the power worm wheel 13, the clamping assembly 004 has good self-locking performance after its position is adjusted, which can effectively prevent the clamping assembly 004 from shifting position.

[0032] The clamping assembly 004 includes a clamping frame 15 and a clamping stabilizing part. The clamping frame 15 is located on one side of the rotating shaft 11. There are two clamping stabilizing parts, which are symmetrically arranged on the clamping frame 15. The clamping stabilizing part includes a clamping cylinder 16, a clamping pressure sensor 17, a clamping block 18, and an auxiliary clamping group. The clamping cylinder 16 is installed on the clamping frame 15. The clamping pressure sensor 17 is installed on the output end of the clamping cylinder 16. The clamping block 18 is installed on the detection end of the clamping pressure sensor 17. The auxiliary clamping group is located on the clamping block 18 and can clamp the irregular metal parts at any position on one side.

[0033] The auxiliary clamping assembly includes an auxiliary plate 19, an auxiliary adjusting cylinder 20, an auxiliary frame 21, and an auxiliary cylinder 22. The auxiliary plate 19 is mounted on the clamping block 18, the auxiliary adjusting cylinder 20 is mounted on the auxiliary plate 19, the auxiliary frame 21 is mounted on the output end of the auxiliary adjusting cylinder 20, and there are two auxiliary cylinders 22, which are symmetrically arranged on the auxiliary frame 21. Each auxiliary cylinder 22 has an auxiliary block 23 at its output end.

[0034] Specifically, when clamping and positioning metal parts, after adjusting the position of the clamping block 18 to the position of the metal part to be clamped by the docking adjustment component 002 and the turning component 003, the clamping cylinder 16 can be activated, so that the output end of the clamping cylinder 16 can drive the clamping pressure sensor 17 and the clamping block 18 to move, so that the two relatively moving clamping blocks 18 clamp the metal part.

[0035] Additionally, when the structure of an irregularly shaped metal part is complex and it is impossible to clamp it from both sides, but only from one side, and when it is difficult to clamp the metal part using only two relatively moving clamping blocks 18, the clamping cylinder 16 can be activated to move the clamping blocks 18. The clamping blocks 18 then move the auxiliary clamping assembly 004 to the side of the metal part to be clamped. The auxiliary adjusting cylinder 20 then moves the auxiliary frame 21, auxiliary cylinder 22, and auxiliary block 23 toward one side of the metal part. The auxiliary block 23 moves by starting the auxiliary cylinder 22, and the two relatively moving auxiliary blocks 23 clamp one side of the metal part, thus clamping the complex metal part. This allows for stable clamping of irregularly shaped metal parts in complex locations from multiple angles and positions. This not only handles metal parts of conventional shapes, but also meets the welding requirements of various irregular structures. Furthermore, by providing several anti-slip pads 27 on each clamping block 18 and auxiliary block 23, the stability of fixing the metal parts can be further improved, greatly expanding its application scenarios.

[0036] In actual welding of metal parts, when it is necessary to rotate the metal parts and weld the remaining parts of the metal parts, two power motors 14 can be started simultaneously. The output of the power motors 14 drives the rotation of the turning shaft 11, which can flip the metal parts.

[0037] As described above, the material support mechanism 001 is installed on the welding base box 3. The material support mechanism 001 is located below the clamping cavity and can support the metal parts to be welded. The material support mechanism 001 includes a material support cylinder 24, a material support plate 25, and a material support slide rod 26. The material support cylinder 24 is installed inside the welding base box 3. The material support plate 25 is located on the output end of the material support cylinder 24. Several material support slide rods 26 are provided. The material support slide rods 26 pass through and slide on the welding base box 3. One end of the material support slide rod 26 is connected to the material support plate 25. By setting the material support slide rod 26, the stability of the sliding process of the material support plate 25 can be further improved.

[0038] Specifically, when clamping and positioning metal parts, the metal parts can be placed on the support plate 25 first. By activating the support cylinder 24, the output end of the support cylinder 24 can drive the support plate 25 to rise and fall. This not only provides stable support for the metal parts and facilitates their quick fixation, but also, when welding the metal parts, the contact between the support plate 25 and the bottom of the metal parts can effectively offset the vibration and impact during welding, reduce welding deviations, and ensure weld quality.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A metal structure welding machine with stable clamping function, comprising a welding robotic arm (1), wherein an automatic welding gun head (2) is mounted on the welding robotic arm (1), characterized in that, Also includes: Welding base box (3), the welding robotic arm (1) is mounted on the welding base box (3); Two welding positioning mechanisms are provided, and the welding positioning mechanisms are symmetrically arranged on the welding base box (3), forming a clamping cavity between the two welding positioning mechanisms; The material support mechanism (001) is installed on the welding base box (3). The material support mechanism (001) is located below the clamping cavity and can support the metal parts to be welded. The welding positioning mechanism includes: A positioning frame (4) is provided on one side of the welded base box (3); The docking adjustment component (002) is mounted on the positioning frame (4); A reversing component (003) is disposed at one end of the docking and repositioning component (002); The clamping assembly (004) is disposed on one side of the turning assembly (003) and is capable of clamping irregularly shaped metal parts.

2. The metal structure welding machine with stable clamping function according to claim 1, characterized in that, The docking and positioning component (002) includes: The docking cylinder (5) is mounted on the positioning frame (4); The clamping cylinder (6) is slidably disposed on one side of the docking cylinder (5) through the clamping and adjusting component, and the adjusting component (003) is disposed on one side of the clamping cylinder (6).

3. A metal structure welding machine with stable clamping function according to claim 2, characterized in that, The clamping and adjusting assembly includes: The adjustment motor (7) is installed on one side of the clamping cylinder (6); The adjusting screw (8) has one end set on the output end of the adjusting motor (7) and the other end passing through the clamping cylinder (6). The adjusting screw (8) is equipped with an adjusting ball nut group (9), which is connected to one end of the clamping cylinder (6).

4. A metal structure welding machine with stable clamping function according to claim 3, characterized in that, The reversing component (003) includes: A reversing box (10) is disposed on one side of the clamping cylinder (6); A rotating shaft (11) is disposed through and rotatably disposed on the side of the rotating box (10) away from the clamping cylinder (6), and the clamping assembly (004) is disposed on the side of the rotating shaft (11); The reversing power unit is located inside the reversing box (10) and connected to the reversing shaft (11).

5. A metal structure welding machine with stable clamping function according to claim 4, characterized in that, The turning power unit includes: A power worm gear (12) is installed through and rotatably inside the reversing box (10); A power worm gear (13) is mounted on the rotating shaft (11), and the power worm gear (13) is connected to the power worm (12); A power motor (14) is installed on the rotating box (10), and the output end of the power motor (14) is connected to one end of the power worm gear (12).

6. A metal structure welding machine with stable clamping function according to claim 5, characterized in that, The clamping assembly (004) includes: A clamping frame (15) is disposed on one side of the rotating shaft (11); Two clamping and stabilizing parts are provided, and the two clamping and stabilizing parts are symmetrically arranged on the clamping frame (15).

7. A metal structure welding machine with stable clamping function according to claim 6, characterized in that, The clamping stabilizing part includes: A clamping cylinder (16) is installed on the clamping frame (15); A clamping pressure sensor (17) is installed on the output end of the clamping cylinder (16); The clamping block (18) is installed on the detection end of the clamping pressure sensor (17); An auxiliary clamping assembly is provided on the clamping block (18) and can clamp one side of the irregular metal part at any position.

8. A metal structure welding machine with stable clamping function according to claim 7, characterized in that, The auxiliary clamping assembly includes: An auxiliary plate (19) is disposed on the clamping block (18); An auxiliary adjustment cylinder (20) is mounted on the auxiliary plate (19); An auxiliary frame (21) is installed on the output end of the auxiliary adjustment cylinder (20); There are two auxiliary cylinders (22), which are symmetrically arranged on the auxiliary frame (21). Each auxiliary cylinder (22) has an auxiliary block (23) at its output end.

9. A metal structure welding machine with stable clamping function according to claim 8, characterized in that, The material support mechanism (001) includes: The material support cylinder (24) is installed inside the welding base box (3); A support plate (25) is provided on the output end of the support cylinder (24); A plurality of support slide rods (26) are provided. The support slide rods (26) pass through and slide on the welded bottom box (3), and one end of the support slide rods (26) is connected to the support plate (25).

10. A metal structure welding machine with stable clamping function according to claim 9, characterized in that, Each clamping block (18) and the auxiliary block (23) is provided with a number of anti-slip pads (27).

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