Sheet metal part welding forming equipment and method thereof

Abstract

The invention discloses sheet metal part welding forming equipment and a method thereof.The sheet metal part welding forming equipment comprises a basic weldment fixing unit which comprises a supporting frame, a supporting welding plate is fixedly connected to the supporting frame, a plurality of positioning holes are formed in the supporting welding plate, and positioning pins are arranged in the positioning holes; and the to-be-welded part clamping unit comprises a portal frame, a double-thread screw is rotationally connected to the portal frame, and end clamping assemblies are symmetrically arranged on the portions, located on the two sides of the supporting welding plate, of the double-thread screw. The position precision of a weldment in the welding process can be ensured through the precise action of the end clamping assembly, the risk of product size deviation is greatly reduced, the product percent of pass is improved, the adjustable design of the end clamping assembly can adapt to sheet metal parts of different shapes and sizes, the use of additional auxiliary clamps is reduced, the cost is reduced, and the preparation time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal welding, in particular to sheet metal welding forming equipment and a method thereof. Background Art

[0002] In the field of sheet metal manufacturing, welding technology plays a pivotal role. Traditional sheet metal welding mostly relies on manual operation. The welder first places the basic weldment on a simple workbench, roughly positions it based on experience and simple measuring tools, and then welds the welded parts one by one with a handheld welding gun. In this way, although the positioning and welding of weldments are completed manually, there is a certain degree of flexibility, but the precision control is heavily dependent on the skill level of the workers. If you are not careful, the position deviation of the weldment will occur, resulting in substandard product dimensions. Moreover, manual welding is slow. After each weld, the welder has to adjust his position, welding gun angle and parameters, which is time-consuming and labor-intensive, and it is difficult to meet the needs of mass production.

[0003] With the development of automation technology, some semi-automatic or automatic welding equipment has emerged. However, there are still many problems with existing equipment. In terms of weldment fixation, the fixing device is not universal. Faced with various sheet metal shapes and sizes, it is difficult to fix quickly and effectively. Additional auxiliary fixtures are often required, which increases costs and preparation time. During the welding process, the operator generally needs a lot of operating experience to ensure the quality of welding. If you are not careful, there will be leaking welding and unqualified welding. Summary of the invention

[0004] In order to solve the deficiencies mentioned in the above-mentioned background technology, the purpose of the present invention is to provide a sheet metal welding forming equipment and method thereof. By supporting the positioning holes on the welding plate and cooperating with the positioning pins, as well as the precise movement of the end clamping assembly, the position accuracy of the weldment during the welding process can be ensured, the risk of product dimensional deviation can be greatly reduced, and the product qualification rate can be improved. The adjustable design of the end clamping assembly can adapt to sheet metal parts of different shapes and sizes, reduce the use of additional auxiliary clamps, reduce costs, and shorten preparation time.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A sheet metal welding forming device and method, comprising:

[0007] A basic weldment fixing unit, comprising a support frame, to which a support welding plate is fixedly connected, and the support welding plate is provided with a plurality of positioning holes, and positioning pins are provided inside the positioning holes;

[0008] A clamping unit for the workpiece to be welded, comprising a gantry, a double-threaded screw is rotatably connected to the gantry, end clamping assemblies are symmetrically arranged on the double-threaded screw and located on both sides of the supporting welding plate, and a first drive motor is installed on the gantry, and the first drive motor is used to drive the double-threaded screw to rotate;

[0009] An automatic welding unit comprises a side plate, both sides of the bottom of the side plate are fixedly connected with screw blocks, a transmission screw is rotatably installed on the support frame, a guide slide bar is fixedly connected to the support frame, the transmission screw and the guide slide bar are symmetrically arranged, one screw block is threadedly connected to the transmission screw, and the other screw block is slidably sleeved on the guide slide bar, a second drive motor is installed on the support frame, the second drive motor is used to drive the transmission screw to rotate, a slide rail is fixedly connected to the top of the side plate, a slider is slidably connected to the slide rail, a mounting plate is arranged on the slider, a welding gun clamp is arranged on the mounting plate, and the automatic welding unit also includes a drive component for driving the slider to move.

[0010] Further preferably, the end clamping assembly includes a drive block, the drive block is threadedly connected to the double-threaded screw, one side of the drive block is in contact with one side of the gantry, an extension rod is fixedly connected to the drive block, and a drive box is movably mounted on the extension rod.

[0011] Further preferably, an electric telescopic rod is fixedly connected to the interior of the drive box, the output end of the electric telescopic rod passes through the drive box and is fixedly connected to a connecting block, the drive box is symmetrically rotatably connected to a pull rod, the end of the pull rod away from the drive box is rotatably connected to an L-shaped clamp, the turning point of the L-shaped clamp is rotatably connected to the connecting block, a steering shaft is fixedly connected to one side of the drive box, the steering shaft rotatably passes through the extension rod, and the drive box is rotatably connected to the extension rod via the steering shaft.

[0012] Further preferably, a spring, a first limit plate and a second limit plate are sleeved on the steering shaft in one of the end clamping assemblies, the first limit plate is fixedly mounted on the extension rod, the second limit plate is fixedly mounted on the drive box, and the first limit plate and the second limit plate are slidably connected to the steering shaft.

[0013] Further preferably, anti-slip grooves are provided on the side where the first limiting plate and the second limiting plate are close to each other, and a receiving groove is provided on the side where the first limiting plate and the second limiting plate are close to each other. The spring is located inside the receiving groove, and the spring is used to provide a pre-tightening force to move the first limiting plate and the second limiting plate away from each other.

[0014] Further preferably, the driving assembly includes a rotating shaft symmetrically arranged on the side panel, the rotating shaft rotates and passes through the side panel, a pulley is fixedly connected to the rotating shaft, a toothed belt is transmission-connected between the two pulleys, a synchronization rod is fixedly connected between the toothed belt and the slider, and a third driving motor is installed on the side panel, and the third driving motor is used to drive any rotating shaft to rotate.

[0015] Further preferably, a rotating rod is provided on the welding gun clamp, a worm gear is fixedly connected to the rotating rod, a connecting shaft is fixedly connected to the worm gear, a steering plate is fixedly connected to the mounting plate, the connecting shaft is rotatably connected to the steering plate, a worm is rotatably connected to the mounting plate, and a turntable is fixedly connected to the worm.

[0016] A sheet metal welding forming method, the specific steps comprising:

[0017] S1. Basic weldment preparation and fixation

[0018] Place the basic weldment on the support welding plate, select the corresponding positioning holes on the support welding plate according to the design drawings of the weldment, insert the positioning pins, and initially position the basic weldment on the support welding plate to ensure that its position accuracy meets the welding start requirements. The close fit between the positioning pins and the positioning holes can effectively limit the translation and rotation of the basic weldment in the plane.

[0019] S2. Clamping of parts to be welded

[0020] Start the first drive motor to drive the double-thread screw to rotate. Due to the special thread structure of the double-thread screw, the end clamping assemblies symmetrically arranged on both sides of the supporting welding plate will move relative to or towards each other. After the end clamping assemblies on both sides have reliably clamped the welded parts, stop the first drive motor;

[0021] S3. Install welding gun

[0022] Install the welding gun on the welding gun fixture, adjust the angle and position of the welding gun, accurately position the welding gun to the welding starting point, and set the key parameters of the welding gun, such as welding current, voltage, and welding speed, in the control system to ensure that the weld can reach the expected strength and quality standards;

[0023] S4, automatic welding process starts

[0024] Turn on the welding gun and start welding according to the preset welding parameters. During the welding process, the third drive motor is started at the same time to drive the rotating shaft to rotate, and the rotating shaft drives the pulley to rotate. Through the toothed belt transmission, the synchronous rod drives the slider to slide along the slide rail to accurately adjust the position of the welding gun in the width direction of the weldment;

[0025] S5. Welding completion and subsequent processing

[0026] After the welding gun completes the welding tasks of all welds according to the preset welding path, the welding gun is turned off, and the second drive motor and the third drive motor are stopped in sequence.

[0027] Control the electric telescopic rod to retract, release the clamping of the welded parts, remove the welded sheet metal parts from the equipment, and perform subsequent processing such as stress relief and grinding to meet the final product requirements.

[0028] Further preferably, the welding gun installation further comprises:

[0029] 1) Start the second drive motor to drive the transmission screw to rotate. Since one screw block is threadedly connected to the transmission screw, and the other screw block is slidably sleeved on the guide slide bar, under the coordinated guiding action of the transmission screw and the guide slide bar, the side plate will drive the entire automatic welding unit to move along the preset direction to achieve the initial positioning of the welding gun in the length direction of the weldment;

[0030] 2) Turn the turntable, the turntable drives the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the welding gun fixture to rotate through the rotating rod, thereby changing the longitudinal height and angle of the welding gun, thereby flexibly changing the welding gun posture and aligning the welding gun with the weld.

[0031] Further preferably, the clamping of the parts to be welded further comprises:

[0032] 1) When the end clamping assembly is close to the workpiece to be welded, the electric telescopic rod is controlled to extend and retract according to the shape and size of the workpiece to be welded: the electric telescopic rod extends, pushing the connecting block to move, the connecting block drives the pull rod to rotate, and the pull rod then drives the L-shaped clamping plate to rotate around its turning point, so as to realize the clamping action of the L-shaped clamping plate on the end of the workpiece to be welded;

[0033] 2) After the welded parts are clamped, the drive box can be flexibly rotated relative to the extension rod through the steering shaft to adapt to the clamping requirements at different angles, and then continue to push the extension rod on the drive block to move, thereby squeezing the spring so that the first limit plate and the second limit plate fit together. The anti-slip pattern increases the friction force to prevent the drive box from rotating during welding, thereby ensuring the stability of the welded parts during the welding process.

[0034] Beneficial effects of the present invention:

[0035] 1. The present invention can ensure the position accuracy of the weldment during the welding process by cooperating the positioning holes and positioning pins on the supporting welding plate and the precise movement of the end clamping assembly, greatly reducing the risk of product size deviation and improving the product qualification rate. The adjustable design of the end clamping assembly can adapt to sheet metal parts of different shapes and sizes, reduce the use of additional auxiliary fixtures, reduce costs, and shorten preparation time;

[0036] 2. The multi-dimensional and flexible control of the automatic welding unit of the present invention can enable the welding gun to reach the welding position quickly and accurately without frequent manual adjustments, significantly improving the welding efficiency and meeting the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the structure of the basic weldment fixing unit in the present invention;

[0040] Figure 3 It is a schematic diagram of the structure of the clamping unit of the workpiece to be welded in the present invention;

[0041] Figure 4 It is a cross-sectional view of the drive box structure in the present invention;

[0042] Figure 5 It is a cross-sectional view of the structure of the first limiting plate and the second limiting plate in the present invention;

[0043] Figure 6 It is a schematic diagram of the structure of the automatic welding unit in the present invention;

[0044] Figure 7 It is a schematic diagram of the structure of the mounting plate in the present invention.

[0045] In the figure:

[0046] 100, basic weldment fixing unit; 101, support frame; 102, support welding plate; 103, positioning hole; 104, positioning pin;

[0047] 200, clamping unit for the welded part; 201, gantry; 202, double-threaded screw; 203, first drive motor; 204, drive block; 205, extension rod; 206, drive box; 207, electric telescopic rod; 208, connecting block; 209, pull rod; 210, L-shaped clamping plate; 211, steering shaft; 212, spring; 213, first limit plate; 214, second limit plate; 215, anti-slip pattern; 216, receiving groove;

[0048] 300, automatic welding unit; 301, side plate; 302, screw block; 303, transmission screw; 304, guide slide bar; 305, second drive motor; 306, slide rail; 307, slider; 308, mounting plate; 309, welding gun fixture; 310, rotating shaft; 311, pulley; 312, toothed belt; 313, synchronization rod; 314, third drive motor; 315, rotating rod; 316, worm wheel; 317, connecting shaft; 318, steering plate; 319, worm; 320, turntable. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside" and "all around" indicate orientation or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] Embodiment 1

[0052] like Figure 1-7 As shown, a sheet metal welding forming device and method thereof include: a basic weldment fixing unit 100, a to-be-welded part clamping unit 200, and an automatic welding unit 300.

[0053] The basic weldment fixing unit 100 includes a support frame 101 , to which a support welding plate 102 is fixedly connected. The support welding plate 102 is provided with a plurality of positioning holes 103 , and positioning pins 104 are provided inside the positioning holes 103 .

[0054] The clamping unit 200 for the workpiece to be welded includes a gantry 201, to which a double-threaded screw 202 is rotatably connected, and end clamping assemblies are symmetrically arranged on the double-threaded screw 202 and on both sides of the supporting welding plate 102. A first drive motor 203 is installed on the gantry 201, and the first drive motor 203 is used to drive the double-threaded screw 202 to rotate.

[0055] The end clamping assembly includes a drive block 204, which is threadedly connected to the double-threaded screw 202, one side of the drive block 204 is in contact with one side of the gantry 201, an extension rod 205 is fixedly connected to the drive block 204, and a drive box 206 is movably installed on the extension rod 205.

[0056] An electric telescopic rod 207 is fixedly connected to the interior of the driving box 206, and the output end of the electric telescopic rod 207 passes through the driving box 206 and is fixedly connected to a connecting block 208. A pull rod 209 is symmetrically rotatably connected to the driving box 206, and one end of the pull rod 209 away from the driving box 206 is rotatably connected to an L-shaped clamp plate 210, and the turning point of the L-shaped clamp plate 210 is rotatably connected to the connecting block 208. A steering shaft 211 is fixedly connected to one side of the driving box 206, and the steering shaft 211 rotates and penetrates the extension rod 205, and the driving box 206 is rotatably connected to the extension rod 205 via the steering shaft 211.

[0057] A spring 212, a first limit plate 213 and a second limit plate 214 are sleeved on the steering shaft 211 in the end clamping assembly. The first limit plate 213 is fixedly mounted on the extension rod 205, and the second limit plate 214 is fixedly mounted on the drive box 206. The first limit plate 213 and the second limit plate 214 are slidably connected to the steering shaft 211.

[0058] An anti-slip groove 215 is provided on the side where the first limiting plate 213 and the second limiting plate 214 are close to each other, and a receiving groove 216 is provided on the side where the first limiting plate 213 and the second limiting plate 214 are close to each other. The spring 212 is located inside the receiving groove 216, and the spring 212 is used to provide a pre-tightening force to move the first limiting plate 213 and the second limiting plate 214 away from each other.

[0059] The automatic welding unit 300 includes a side plate 301, both sides of the bottom of the side plate 301 are fixedly connected with screw blocks 302, a transmission screw 303 is rotatably installed on the support frame 101, a guide slide bar 304 is fixedly connected to the support frame 101, the transmission screw 303 and the guide slide bar 304 are symmetrically arranged, one of the screw blocks 302 is threadedly connected to the transmission screw 303, and the other screw block 302 is slidably sleeved on the guide slide bar 304, a second drive motor 305 is installed on the support frame 101, and the second drive motor 305 is used to drive the transmission screw 303 to rotate, a slide rail 306 is fixedly connected to the top of the side plate 301, a slider 307 is slidably connected to the slide rail 306, a mounting plate 308 is provided on the slider 307, and a welding gun fixture 309 is provided on the mounting plate 308, and the automatic welding unit 300 also includes a driving component for driving the slider 307 to move.

[0060] The driving assembly includes a rotating shaft 310 symmetrically arranged on the side plate 301, and the rotating shaft 310 rotates and passes through the side plate 301. A pulley 311 is fixedly connected to the rotating shaft 310, and a toothed belt 312 is transmission-connected between the two pulleys 311. A synchronization rod 313 is fixedly connected between the toothed belt 312 and the slider 307. A third driving motor 314 is installed on the side plate 301, and the third driving motor 314 is used to drive any rotating shaft 310 to rotate.

[0061] The welding gun fixture 309 is provided with a rotating rod 315, the rotating rod 315 is fixedly connected to a worm gear 316, the worm gear 316 is fixedly connected to a connecting shaft 317, the mounting plate 308 is fixedly connected to a steering plate 318, the connecting shaft 317 is rotatably connected to the steering plate 318, the mounting plate 308 is rotatably connected to a worm 319, and the worm 319 is fixedly connected to a turntable 320, so as to facilitate manual adjustment by the operator.

[0062] Embodiment 2

[0063] The present application also provides a sheet metal welding forming method, which is implemented based on the sheet metal welding forming equipment mentioned above, and the specific steps include:

[0064] S1. Basic weldment preparation and fixation

[0065] Place the basic weldment on the support welding plate 102, select the corresponding positioning hole 103 on the support welding plate 102 according to the design drawing of the weldment, insert the positioning pin 104, and preliminarily position the basic weldment on the support welding plate 102 to ensure that its position accuracy meets the welding start requirements. The close fit between the positioning pin 104 and the positioning hole 103 can effectively limit the translation and rotation of the basic weldment in the plane;

[0066] S2. Clamping of parts to be welded

[0067] The first driving motor 203 is started to drive the double-threaded screw 202 to rotate. Due to the special thread structure of the double-threaded screw 202, the end clamping components symmetrically arranged on both sides of the supporting welding plate 102 will move relative to or towards each other;

[0068] When the end clamping assembly is close to the workpiece to be welded, the electric telescopic rod 207 is controlled to extend and retract according to the shape and size of the workpiece to be welded: the electric telescopic rod 207 extends, pushing the connecting block 208 to move, the connecting block 208 drives the pull rod 209 to rotate, and the pull rod 209 further drives the L-shaped clamping plate to rotate around its turning point, so as to realize the clamping action of the L-shaped clamping plate on the end of the workpiece to be welded;

[0069] After the welded parts are clamped, the driving box 206 can be flexibly rotated relative to the extension rod 205 through the steering shaft 211 to meet the clamping requirements at different angles, and then continue to push the extension rod 205 on the driving block 204 to move, thereby squeezing the spring 212, so that the first limiting plate 213 and the second limiting plate 214 fit together, and the anti-slip pattern 215 thereof increases the friction force, preventing the driving box 206 from rotating during welding, thereby ensuring the stability of the welded parts during the welding process;

[0070] After the end clamping assemblies on both sides have reliably clamped the welded parts, the first drive motor 203 is stopped;

[0071] S3. Install welding gun

[0072] The welding gun is mounted on the welding gun fixture 309, the angle and position of the welding gun are adjusted, and the second driving motor 305 is started to drive the transmission screw 303 to rotate. Since one screw block 302 is threadedly connected with the transmission screw 303, and the other screw block 302 is slidably sleeved on the guide slide bar 304, under the coordinated guiding action of the transmission screw 303 and the guide slide bar 304, the side plate 301 will drive the entire automatic welding unit 300 to move along the preset direction, so as to realize the preliminary positioning of the welding gun in the length direction of the weldment;

[0073] The turntable 320 is rotated, and the turntable 320 drives the worm 319 to rotate, and the worm 319 drives the worm wheel 316 to rotate, and the worm wheel 316 drives the welding gun fixture 309 to rotate through the rotating rod 315, thereby changing the longitudinal height and angle of the welding gun, thereby flexibly changing the welding gun posture, aligning the welding gun with the weld, accurately positioning the welding gun to the welding starting point, and setting the welding gun's welding current, voltage, and welding speed key parameters in the control system to ensure that the weld can reach the expected strength and quality standards;

[0074] S4, automatic welding process starts

[0075] Turn on the welding gun and start welding according to the preset welding parameters. During the welding process, the third driving motor 314 is started to drive the rotating shaft 310 to rotate, and the rotating shaft 310 drives the pulley 311 to rotate. The synchronous rod 313 drives the slider 307 to slide along the slide rail 306 through the toothed belt 312 to accurately adjust the position of the welding gun in the width direction of the weldment.

[0076] S5. Welding completion and subsequent processing

[0077] When the welding gun completes the welding task of all welds according to the preset welding path, the welding gun is turned off, and the second drive motor 305 and the third drive motor 314 are stopped in sequence.

[0078] The electric telescopic rod 207 is controlled to retract, the clamping of the welded part is released, the welded sheet metal part is removed from the equipment, and subsequent processing such as stress relief and grinding is performed to meet the final product requirements.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A sheet metal welding forming equipment, characterized in that: include: A basic weldment fixing unit (100) comprises a support frame (101), a support welding plate (102) is fixedly connected to the support frame (101), a plurality of positioning holes (103) are arranged on the support welding plate (102), and positioning pins (104) are arranged inside the positioning holes (103); A clamping unit (200) for a workpiece to be welded, comprising a gantry (201), a double-threaded screw (202) being rotatably connected to the gantry (201), end clamping assemblies being symmetrically arranged on the double-threaded screw (202) and located on both sides of a supporting welding plate (102), and a first drive motor (203) being installed on the gantry (201), the first drive motor (203) being used to drive the double-threaded screw (202) to rotate; The automatic welding unit (300) comprises a side plate (301), both sides of the bottom of the side plate (301) are fixedly connected with screw blocks (302), a transmission screw rod (303) is rotatably mounted on the support frame (101), a guide slide bar (304) is fixedly connected to the support frame (101), the transmission screw rod (303) and the guide slide bar (304) are symmetrically arranged, one of the screw blocks (302) is threadedly connected to the transmission screw rod (303), and the other of the screw blocks (302) is slidably sleeved on the guide slide bar (304), A second drive motor (305) is installed on the support frame (101), and the second drive motor (305) is used to drive the transmission screw (303) to rotate. The top of the side plate (301) is fixedly connected to a slide rail (306), and a slider (307) is slidably connected to the slide rail (306). A mounting plate (308) is arranged on the slider (307), and a welding gun clamp (309) is arranged on the mounting plate (308). The automatic welding unit (300) also includes a drive component for driving the slider (307) to move.

2. The sheet metal welding forming equipment according to claim 1, characterized in that: The end clamping assembly comprises a driving block (204), the driving block (204) being threadedly connected to the double-threaded screw (202), one side of the driving block (204) being in contact with one side of the gantry (201), an extension rod (205) being fixedly connected to the driving block (204), and a driving box (206) being movably mounted on the extension rod (205).

3. The sheet metal welding forming equipment according to claim 2, characterized in that: An electric telescopic rod (207) is fixedly connected inside the driving box (206); an output end of the electric telescopic rod (207) passes through the driving box (206) and is fixedly connected to a connecting block (208); a pull rod (209) is symmetrically rotatably connected to the driving box (206); one end of the pull rod (209) away from the driving box (206) is rotatably connected to an L-shaped clamping plate (210); a turning point of the L-shaped clamping plate (210) is rotatably connected to the connecting block (208); a steering shaft (211) is fixedly connected to one side of the driving box (206); the steering shaft (211) rotatably passes through the extension rod (205); and the driving box (206) is rotatably connected to the extension rod (205) via the steering shaft (211).

4. The sheet metal welding forming equipment according to claim 3, characterized in that: A spring (212), a first limiting plate (213) and a second limiting plate (214) are sleeved on the steering shaft (211) in one of the end clamping assemblies; the first limiting plate (213) is fixedly mounted on the extension rod (205); the second limiting plate (214) is fixedly mounted on the driving box (206); and the first limiting plate (213) and the second limiting plate (214) are slidably connected to the steering shaft (211).

5. The sheet metal welding forming equipment according to claim 4, characterized in that: An anti-slip groove (215) is provided on one side where the first limiting plate (213) and the second limiting plate (214) are close to each other, and an accommodating groove (216) is provided on one side where the first limiting plate (213) and the second limiting plate (214) are close to each other. The spring (212) is located inside the accommodating groove (216), and the spring (212) is used to provide a pre-tightening force for the first limiting plate (213) and the second limiting plate (214) to move away from each other.

6. The sheet metal welding forming equipment according to claim 1, characterized in that: The driving assembly comprises a rotating shaft (310) symmetrically arranged on the side plate (301), the rotating shaft (310) rotatably passes through the side plate (301), a pulley (311) is fixedly connected to the rotating shaft (310), a toothed belt (312) is transmission-connected between the two pulleys (311), a synchronization rod (313) is fixedly connected between the toothed belt (312) and the slider (307), and a third driving motor (314) is installed on the side plate (301), and the third driving motor (314) is used to drive any rotating shaft (310) to rotate.

7. The sheet metal welding forming equipment according to claim 6, characterized in that: The welding gun fixture (309) is provided with a rotating rod (315), a worm wheel (316) is fixedly connected to the rotating rod (315), a connecting shaft (317) is fixedly connected to the worm wheel (316), a steering plate (318) is fixedly connected to the mounting plate (308), the connecting shaft (317) is rotatably connected to the steering plate (318), a worm (319) is rotatably connected to the mounting plate (308), and a rotating disk (320) is fixedly connected to the worm (319).

8. A sheet metal welding forming method, implemented based on the sheet metal welding forming equipment according to any one of claims 1 to 7, characterized in that: The specific steps include: S1. Basic weldment preparation and fixation The basic weldment is placed on the supporting welding plate (102), and according to the design drawing of the weldment, the corresponding positioning hole (103) on the supporting welding plate (102) is selected, and the positioning pin (104) is inserted to preliminarily position the basic weldment on the supporting welding plate (102), ensuring that its position accuracy meets the welding start requirement, and the close fit between the positioning pin (104) and the positioning hole (103) can effectively limit the translation and rotation of the basic weldment in the plane; S2. Clamping of parts to be welded The first drive motor (203) is started to drive the double-threaded screw (202) to rotate. Due to the special thread structure of the double-threaded screw (202), the end clamping assemblies symmetrically arranged on both sides of the support welding plate (102) will move relative to or towards each other. After the end clamping assemblies on both sides have reliably clamped the welded parts, the first drive motor (203) is stopped. S3. Install welding gun Installing the welding gun on the welding gun fixture (309), adjusting the angle and position of the welding gun, accurately positioning the welding gun to the welding starting point, and setting the welding current, voltage, and welding speed key parameters of the welding gun in the control system to ensure that the weld can reach the expected strength and quality standards; S4, automatic welding process starts The welding gun is turned on and welding is started according to preset welding parameters. During the welding process, the third driving motor (314) is simultaneously started to drive the rotating shaft (310) to rotate. The rotating shaft (310) drives the pulley (311) to rotate. The synchronous rod (313) drives the slider (307) to slide along the slide rail (306) through the toothed belt (312) to accurately adjust the position of the welding gun in the width direction of the weldment. S5. Welding completion and subsequent processing When the welding gun completes the welding task of all welds according to the preset welding path, the welding gun is turned off, and the second drive motor (305) and the third drive motor (314) are stopped in sequence; The electric telescopic rod (207) is controlled to retract, the clamping of the welded part is released, and the welded sheet metal part is removed from the equipment for stress relief and grinding and subsequent processing to meet the final product requirements.

9. The sheet metal welding forming method according to claim 8, characterized in that: The welding gun installation also includes: 1) Start the second drive motor (305) to drive the transmission screw (303) to rotate. Since one screw block (302) is threadedly connected to the transmission screw (303), and the other screw block (302) is slidably sleeved on the guide slide bar (304), under the coordinated guiding action of the transmission screw (303) and the guide slide bar (304), the side plate (301) will drive the entire automatic welding unit (300) to move along a preset direction, thereby achieving preliminary positioning of the welding gun in the length direction of the weldment; 2) Rotate the turntable (320), the turntable (320) drives the worm (319) to rotate, the worm (319) drives the worm wheel (316) to rotate, and the worm wheel (316) drives the welding gun fixture (309) to rotate through the rotating rod (315), thereby changing the longitudinal height and angle of the welding gun, thereby flexibly changing the welding gun posture and aligning the welding gun with the weld.

10. The sheet metal welding forming method according to claim 8, characterized in that: The clamping of the parts to be welded also includes: 1) When the end clamping assembly is close to the workpiece to be welded, the electric telescopic rod (207) is controlled to extend and retract according to the shape and size of the workpiece to be welded: the electric telescopic rod (207) is extended to push the connecting block (208) to move, and the connecting block (208) drives the pull rod (209) to rotate, and the pull rod (209) in turn drives the L-shaped clamping plate to rotate around its turning point, thereby realizing the clamping action of the L-shaped clamping plate on the end of the workpiece to be welded; 2) After the welded parts are clamped, the driving box (206) can be flexibly rotated relative to the extension rod (205) through the steering shaft (211) to meet the clamping requirements of different angles, and then continue to push the extension rod (205) on the driving block (204) to move, thereby squeezing the spring (212) so that the first limit plate (213) and the second limit plate (214) fit together, and the anti-slip grooves (215) increase the friction force to prevent the driving box (206) from rotating during welding, thereby ensuring the stability of the welded parts during the welding process.

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