A sheet metal welding apparatus and welding method

Abstract

The present application relates to welding equipment technical field, especially to a kind of sheet welding equipment and welding method, including bottom plate, the upper of bottom plate is provided with two electrically driven sliding table that can swing to adjust sheet butt joint angle, the upper end of bottom plate corresponds the two sides of electrically driven sliding table and is provided with fixed support plate, electrically driven sliding table is rotatedly installed in the inside of support plate by first servo motor drive that is fixedly installed in the side of support plate to realize angle deflection, the upper of electrically driven sliding table is slidably installed with sliding frame for driving sheet to carry out preliminary position adjustment.This application realizes the stable support to sheet angle position by the dynamic cooperation of this structure, and also uses the self-adaptive fit of limiting structure to construct a semi-closed airflow restriction space for the weld area that is angle welded, so that cold air can only flow from the two ends of the passage, improve the concentration of cooling airflow and heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a thin plate welding equipment and welding method. Background Technology

[0002] Thin plate welding is widely used in automobile manufacturing and precision instruments, which places extremely high demands on the forming accuracy of weld joints and the control of the heat-affected zone. In existing thin plate welding processes, the butt joint operation of two thin plates usually faces multiple technical challenges.

[0003] In welding scenarios where thin plates require angled butt joints, conventional welding fixtures often have fixed structures, only capable of achieving single horizontal or preset angle butt joints. They lack flexible swing adjustment mechanisms to adapt to real-time changes in angle welding requirements, resulting in poor versatility of welding equipment. Secondly, the heat accumulation during the welding process easily leads to thermal deformation and residual stress in the thin plate, affecting welding quality. Although existing equipment has cooling measures, the direction of its cooling airflow is mostly fixed, and it cannot adjust the airflow channel according to whether the thin plate is horizontally butt jointed or angled. Especially when the thin plate is angled, the cooling airflow cannot form a concentrated constraint channel for the weld area, resulting in low heat dissipation efficiency, poor cooling effect, and difficulty in effectively suppressing welding thermal deformation. During the clamping and positioning process of the thin plate before welding, traditional clamping mechanisms are difficult to achieve automated centering adjustment of the thin plate, and the weld misalignment is easily caused by the placement deviation of the thin plate, further aggravating the generation of welding defects. Therefore, we propose a thin plate welding equipment and welding method. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a thin plate welding device, comprising a base plate, two swingable electric slides for adjusting the butt joint angle of the thin plates are arranged above the base plate, and fixed support plates are arranged on both sides of the upper end of the base plate corresponding to the electric slides. The electric slides are driven by a first servo motor fixedly installed on the side of the support plate to rotate inside the support plate to achieve angle swing. A sliding frame for initially adjusting the position of the thin plate is slidably installed above the electric slides, and a fixed mounting block is arranged above the sliding frame. A mounting groove is opened on the upper side of the mounting block, and a sliding block that can move up and down to support or make way for the side of the thin plate is arranged inside the mounting groove. A cooling supply is provided inside the sliding block. The structure guides the airflow. The sliding block has a mounting cavity on its side. Inside the mounting cavity, there is a limiting structure to constrain the direction of cold air flow so as to form a concentrated cooling channel when the plates are joined at an angle. Inside the mounting block, there are two clamping structures that constrain the thin plates on both sides to achieve automatic centering and clamping. Inside the mounting block, there is also a second screw nut fixing seat that pushes and fine-tunes the thin plates to make the joint gap uniform. Inside the mounting block, there is a pressing block that presses the thin plates to ensure that they fit tightly against the inner side of the mounting block. Above the base plate, between the two mounting blocks, there is a welding structure for welding the joined thin plates. On the side of the mounting block, there is a first connecting plate that supports the bottom of the thin plates to prevent sagging.

[0005] As a preferred embodiment of the present invention, the guiding structure includes a guiding groove formed on the side of the sliding block, and an adapter hole that communicates with the inside of the guiding groove is formed at equal intervals on the side of the sliding block corresponding to the position of the guiding groove. The adapter hole has a semi-circular cross-section, and two connecting pipes are fixedly installed on the upper end of the sliding block.

[0006] As a preferred embodiment of the present invention, the limiting structure includes a first sliding plate slidably installed inside the mounting cavity, a first spring fixedly installed on one side of the first sliding plate, the end of the first spring away from the first sliding plate fixedly installed inside the mounting cavity, a compression spring fixedly installed on the side of the sliding block, the end of the compression spring away from the sliding block slidably installed on the side of the second lead screw nut fixing seat, a first sliding groove opened on the upper side of the sliding block, an expansion joint fixedly installed on the upper side of the mounting block, a connecting block fixedly installed at the output end of the expansion joint, a connecting rod fixedly installed on the side of the connecting block, and a first slider slidably disposed inside the first sliding groove fixedly installed on the side of the connecting rod.

[0007] As a preferred embodiment of the present invention, the clamping structure includes two second sliding grooves formed inside the mounting block. A second slider is slidably mounted inside each of the two second sliding grooves. A second connecting plate is fixedly mounted on the upper side of the two second sliders. A second sliding plate is slidably mounted on the side of the second connecting plate. A fixed second spring is provided between the second connecting plate and the second sliding plate. A guide hole is formed on the side of the second sliding plate. A fixed guide post is provided on the side of the second connecting plate corresponding to the guide hole. A mounting bracket is fixedly mounted on the side of the second sliding plate away from the second connecting plate. A fixed contact sensor is provided on the side of the mounting bracket corresponding to the guide post. A third sliding groove is formed on the bottom inside the mounting block. A sliding first lead screw nut fixing seat is provided on the bottom side of the second sliding plate corresponding to the third sliding groove. A second servo motor is fixedly mounted on the side of the mounting block. A first lead screw nut shaft is fixedly mounted at the output end of the second servo motor. Two first lead screw nut fixing seats on the two clamping structures are spirally connected in opposite directions to the first lead screw nut shaft.

[0008] As a preferred embodiment of the present invention, a fourth sliding groove is provided on the side of the first connecting plate, and a rotating second lead screw nut shaft is provided inside the fourth sliding groove. The second lead screw nut fixing seat is threadedly connected to the second lead screw nut shaft, and a limiting block for limiting the second lead screw nut fixing seat is fixedly provided on the upper side of the first connecting plate.

[0009] As a preferred embodiment of the present invention, two fixed posts are fixedly installed on the bottom side of the sliding block, a third spring is fixedly installed at the lower end of the fixed posts, a connecting sleeve is slidably installed inside the fixed posts, the lower end of the third spring is fixedly installed on the side of the connecting sleeve, and the pressing block is fixedly installed at the lower end of the two connecting sleeves.

[0010] As a preferred embodiment of the present invention, the welding structure includes a lifting frame fixedly installed on the upper side of the base plate, a fixed automatic moving frame is provided above the lifting frame, and a sliding welding gun is provided on the automatic moving frame.

[0011] A welding method using a thin plate welding equipment includes the following steps: Step 1: Place two thin plates inside the mounting blocks on both sides respectively, and support the thin plates through the first connecting plate; Step 2: Start the second servo motor to drive the first lead screw nut shaft to rotate, which will cause the first lead screw nut fixing seats in the clamping structure on both sides to move towards each other, so that the second sliding plate presses against the side of the thin plate. When the guide post triggers the contact sensor, the movement stops, and the automatic centering and clamping of the thin plate is completed. Step 2.1: Press the thin plate firmly against the inner bottom surface of the mounting block using the pressing block under the elastic force of the third spring; Step 3: Adjust the welding posture according to the required butt joint angle of the two thin plates; Step 3.1: If it is a horizontal butt joint, the sliding bracket moves on the electric slide table to make the two mounting blocks on the same plane. The second lead screw nut shaft rotates to drive the second lead screw nut fixing seat to move. The compression spring pushes the sliding block and the thin plate to make fine adjustment of the joint so that the two sliding blocks are aligned with each other. Step 3.2: If it is an angled docking, the electric slide is driven by the first servo motor to swing to the preset angle within the support plate, and the sliding block is driven by the telescopic device to move down to the top of the thin plate for side support. Step 4: Connect the external air source to the connecting pipe through a flexible hose, and the air will be discharged through the guide groove and adapter hole; Step 4.1: When the two sliding blocks are horizontally aligned, the two adapter holes are joined to form a downward circular through hole, and the cold air blows directly downwards into the welding area; Step 4.2: When the two sliding blocks approach each other at an angle, the first sliding plate pops out under the action of the first spring and fits together with the two sliding blocks and the two thin plates to form a cold air channel with open ends. The cold air is concentrated and discharged from both ends of the channel. Step 5: Adjust the height of the welding gun using the lifting frame, and control the movement trajectory of the welding gun using the automatic frame shifting mechanism to perform welding operations at the joint of the two thin plates.

[0012] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention, through the combination of a swingable electric slide table, a sliding frame, and sliding blocks and limiting structures inside the mounting block, enables flexible adjustment of the welding angle of thin plates and forms an efficient heat dissipation channel. When two thin plates need to be joined at an angle, the electric slide table is driven by a first servo motor to swing inside the support plate, which can precisely control the tilt angle of the mounting block and the thin plates to meet the welding requirements of different angles. On this basis, the sliding block can be controlled by the telescopic device to move downward to the top of the thin plate for lateral support. When the two sliding blocks approach each other at a certain angle with the thin plates, the first sliding plate inside the mounting cavity pops out under the action of the first spring and fits together. The first sliding plates of the two limiting structures, the sides of the two sliding blocks, and the two thin plates together form a cold air channel that is only open at both ends. Through this dynamic cooperation between the structures, not only is stable support for the angle position of the thin plates achieved, but also a semi-enclosed airflow constraint space is constructed for the weld area of ​​the angled welding by utilizing the adaptive fitting of the limiting structure, so that the cold air can only flow from both ends of the channel, improving the concentration of cooling airflow and heat dissipation efficiency.

[0013] 2. This invention utilizes a guiding structure comprised of a guide groove, equidistant fitting holes, and a connecting pipe on the side of the sliding block. This structure, in conjunction with the sliding block's movement alignment and restraint structure, adapts to different docking states to optimize the cooling airflow path and improve heat dissipation accuracy. When two thin plates are horizontally docked on the same plane, the cooperation of the second lead screw nut fixing seat and the compression spring pushes the two sliding blocks closer together and aligned. The fitting holes on the sides of the two sliding blocks, which were originally semi-circular cross-sections, will interlock to form a complete downward circular through-hole. After the external cold air enters the connecting pipe and guide groove through the flexible hose, it will not only be discharged from both sides of the guide groove but also... This circular cooling system, formed by two adapter holes, directly blows cooling air downwards into the weld area. When the two thin plates are angled together, the two sliding blocks form an angle, preventing the adapter holes from closing. In this case, the cooling air mainly sprays upwards along the guide groove and is forced to flow out from both ends of the channel formed by the thin plates, sliding blocks, and the limiting structure after being blocked by the fitting limiting structure. This guide structure, based on the different docking states of the sliding blocks, works in conjunction with the blocking action of the limiting structure to dynamically change the exhaust path of the cooling airflow. This design achieves multi-directional direct blowing during planar welding and strong exhaust from both ends during angled welding, effectively suppressing the thermal deformation of the thin plates.

[0014] 3. This invention utilizes a clamping structure within the mounting block, consisting of a second connecting plate, a second sliding plate, a guide post, and a contact sensor, which, in conjunction with the elastic pressing structure of the extrusion block, achieves automatic centering, clamping, and stable adhesion of the thin plate, thereby ensuring welding accuracy. After the thin plate is placed on the mounting block and the first connecting plate, the first lead screw nut shaft is rotated by a second servo motor. Since the two first lead screw nut fixing seats are connected by opposite spirals, they can drive the clamping structures on both sides to move synchronously towards the center. During this process, the second sliding plate first contacts the side of the thin plate. As the thrust increases, the second connecting plate overcomes the elastic force of the second spring, causing the guide post to move relative to the guide hole. As the guide post slides and gradually approaches the contact sensor, the system immediately stops the second servo motor when it touches the sensor, thus achieving precise centering and clamping of the thin plate's side. This avoids damage from overpressure or improper clamping. Through the cooperation of the fixed post, the third spring, and the connecting sleeve, the extrusion block, under elastic pressure, tightly presses the upper surface of the thin plate against the inner bottom surface of the mounting block. This coordinated operation of the clamping and pressing structures achieves automatic centering and positioning on both sides using contact sensing, and eliminates vertical gaps in the thin plate using elastic extrusion. The combination of these two features ensures the precise positioning of the thin plate before welding, laying the foundation for weld formation.

[0015] 4. This invention utilizes the transmission structure of the second lead screw nut shaft and the second lead screw nut fixing seat on the first connecting plate, in conjunction with the sliding frame, compression spring, and limiting block, to smoothly support and push the thin plate for fine-tuning, thereby controlling the joint gap. Before welding the thin plates together, the relative position and gap between the two thin plates need to be precisely adjusted. The overall movement of the sliding frame on the electric slide table allows for rapid adjustment of the initial position of the mounting block and the thin plate. When fine-tuning for precise alignment is required, the first connecting plate provides a stable support base for the thin plate. By driving the second lead screw nut shaft to rotate, the second lead screw nut shaft threaded onto it... The rod nut fixing seat moves smoothly along the fourth slide groove. The movement of the second screw nut fixing seat is not only achieved by the compression spring pushing the sliding block and the thin plate for fine position adjustment, but also by the limit block precisely limiting the stroke of the second screw nut fixing seat to prevent excessive pushing. This combination of support and movement structure ensures that when the thin plate is subjected to the thrust of the second screw nut fixing seat, it is stably supported at the bottom by the first connecting plate and has flexible buffering on the side by the compression spring. The movement is smooth and without jumping, thus enabling precise control of the uniform gap width at the joint of the two thin plates, effectively avoiding welding defects caused by uneven gaps. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structural angle connection of the present invention; Figure 3 This is a schematic diagram of the welding gun structure of the present invention; Figure 4 This is a schematic diagram of the first connecting plate structure of the present invention; Figure 5 This is a schematic diagram of the second lead screw nut fixing seat structure of the present invention; Figure 6 This is a schematic diagram of the second connecting plate structure of the present invention; Figure 7 This is a schematic diagram of the sliding block structure of the present invention; Figure 8 This is a schematic diagram of the first sliding plate structure of the present invention.

[0017] Wherein: 111, base plate; 112, support plate; 113, electric slide table; 114, sliding frame; 115, mounting block; 116, first connecting plate; 211, mounting groove; 212, sliding block; 213, guide groove; 214, adapter hole; 215, connecting pipe; 221, mounting cavity; 222, first sliding plate; 223, first spring; 231, telescopic device; 232, connecting block; 233, connecting rod; 234, first slide groove; 235, first slider; 236, compression spring; 311, second slide groove; 312, second slider; 313, second connecting plate; 314. Second spring; 315. Second sliding plate; 316. Guide hole; 317. Mounting bracket; 318. Contact sensor; 319. Guide post; 321. First lead screw nut fixing seat; 322. Second servo motor; 323. First lead screw nut shaft; 324. Third slide groove; 411. Fourth slide groove; 412. Second lead screw nut fixing seat; 413. Second lead screw nut shaft; 414. Limit block; 511. Lifting frame; 512. Automatic moving frame; 513. Welding gun; 611. Fixing post; 612. Third spring; 613. Connecting sleeve; 614. Extrusion block. Detailed Implementation

[0018] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0019] Example: Figures 1 to 8As shown, a thin plate welding device includes a base plate 111. Two swingable electric slides 113 are mounted above the base plate 111. Fixed support plates 112 are mounted on both sides of the upper end of the base plate 111 corresponding to the electric slides 113. The electric slides 113 are rotatably mounted inside the support plates 112 via a first servo motor fixedly mounted on the side of the support plates 112. A sliding frame 114 is slidably mounted above the electric slides 113. A fixed mounting block 115 is mounted above the sliding frame 114. A mounting groove 211 is formed on the upper side of the mounting block 115. A movable sliding block 212 is disposed inside the mounting groove 211. The sliding block 212 has an L-shaped cross-section and a guiding structure for the flow of cold air is formed inside the sliding block 212. The guiding structure includes a guide groove 213 formed on the side of the sliding block 212. At equal intervals on the side of the sliding block 212 corresponding to the guide groove 213, there are grooves that interact with the interior of the guide groove 213. The adapter hole 214 is a semi-circular hole. Two connecting pipes 215 are fixedly installed on the upper end of the sliding block 212. The side of the sliding block 212 has an installation cavity 221. The interior of the installation cavity 221 is equipped with a restricting structure to constrain the flow of cold air. The interior of the installation block 115 is equipped with two clamping structures to constrain the thin plate. The interior of the installation block 115 is equipped with a second screw nut fixing seat 412 to push the thin plate. The interior of the installation block 115 is equipped with a pressing block 614 to press the thin plate. A welding structure is provided between the two installation blocks 115 on the upper part of the base plate 111. The side of the installation block 115 is equipped with a first connecting plate 116 to support the thin plate. The welding structure includes a lifting frame 511 fixedly installed on the upper side of the base plate 111. A fixed automatic moving frame 512 is provided above the lifting frame 511. A sliding welding gun 513 is provided on the automatic moving frame 512.

[0020] More specifically, when two thin plates need to be horizontally joined, the thin plates are first placed inside the mounting block 115. The thin plates are supported by the interior of the mounting block 115 and the first connecting plate 116. Two clamping structures constrain and center the sides of the thin plates, ensuring that the thin plates are in the center position inside the mounting block 115. The pressing block 614 ensures that the thin plates are tightly fitted to the inside of the mounting block 115. The moving sliding frame 114 controls the initial position of the mounting block 115. The moving second lead screw nut fixing seat 412 then controls the thin plates and the sliding frame. When block 212 moves, it is positioned above the thin plate. When the two sliding blocks 212 approach each other, the limiting structure inside the mounting cavity 221 moves into the cavity, causing the guiding structures inside the two sliding blocks 212 to converge. This allows cold air to be directly blown onto the welding position of the thin plate for rapid heat dissipation. When an angled connection between the two thin plates is required, the electric slide 113 is oscillated, and the sliding block 212 is moved downwards to above the thin plate. Then, the two thin plates and the sliding block 212 are controlled to... When the two thin plates are aligned at a certain angle, the sliding block 212 supports the sides of the thin plates. At this time, there is a certain angle between the two sliding blocks 212, and the two limiting structures are in contact, so that the two thin plates, the two sliding blocks 212, and the two limiting structures form a channel through which cold air can only exit from both ends. The height of the welding gun 513 is controlled by the lifting frame 511, and the welding position of the welding gun 513 is controlled by the automatic moving frame 512 to weld the thin plates. The external cold air is connected to the connecting pipe 215 through the flexible hose. The guide groove 213 conveys the discharge. When the two sliding blocks 212 on the same plane are aligned with each other, the two adapter holes 214 form a downward circular through hole, allowing the cold air to flow from the bottom through the guide groove 213 and the adapter hole 214. When the two sliding blocks 212 approach each other at a certain angle, the cold air is sprayed upward through the guide groove 213. When it is blocked by the restricting structure, it can only flow from both ends of the channel formed by the two thin plates, the two sliding blocks 212 and the two restricting structures, so that the cold air is more concentrated to cool the welding position.

[0021] like Figure 7 and Figure 8As shown, specifically, the limiting structure includes a first sliding plate 222 slidably installed inside the mounting cavity 221. A first spring 223 is fixedly installed on one side of the first sliding plate 222. The end of the first spring 223 away from the first sliding plate 222 is fixedly installed inside the mounting cavity 221. A compression spring 236 is fixedly installed on the side of the sliding block 212. The end of the compression spring 236 away from the sliding block 212 is slidably installed on the side of the second lead screw nut fixing seat 412. A first sliding groove 234 is opened on the upper side of the sliding block 212. A telescopic device 231 is fixedly installed on the upper side of the mounting block 115. A connecting block 232 is fixedly installed at the output end of the telescopic device 231. A connecting rod 233 is fixedly installed on the side of the connecting block 232. A first slider 235 slidably disposed inside the first sliding groove 234 is fixedly installed on the side of the connecting rod 233.

[0022] More specifically, when the second lead screw nut fixing seat 412 moves, it compresses the sliding block 212 by the compression spring 236, controls the movement of the sliding block 212, drives the thin plate to move, and controls the telescopic device 231 to make the sliding block 212 move up and down.

[0023] like Figure 5 and Figure 6 As shown, specifically, the clamping structure includes two second sliding grooves 311 formed inside the mounting block 115. A second slider 312 is slidably mounted inside each of the two second sliding grooves 311. A second connecting plate 313 is fixedly mounted on the upper side of each of the two second sliders 312. A second sliding plate 315 is slidably mounted on the side of the second connecting plate 313. A fixed second spring 314 is provided between the second connecting plate 313 and the second sliding plate 315. A guide hole 316 is formed on the side of the second sliding plate 315. A fixed guide post 319 is provided on the side of the second connecting plate 313 corresponding to the position of the guide hole 316. The second sliding plate 315 is located away from the second... A mounting bracket 317 is fixedly installed on one side of the connecting plate 313. A fixed contact sensor 318 is set on the side of the mounting bracket 317 corresponding to the position of the guide post 319. A third sliding groove 324 is opened on the bottom side of the mounting block 115. A sliding first lead screw nut fixing seat 321 is set on the bottom side of the second sliding plate 315 corresponding to the third sliding groove 324. A second servo motor 322 is fixedly installed on the side of the mounting block 115. A first lead screw nut shaft 323 is fixedly installed at the output end of the second servo motor 322. Two first lead screw nut fixing seats 321 on the two clamping structures are connected to the first lead screw nut shaft 323 in opposite spirals.

[0024] More specifically, the second servo motor 322 drives the first lead screw nut shaft 323 to rotate, and the first lead screw nut shaft 323 drives the first lead screw nut fixing seat 321 to move. When the two second connecting plates 313 press against the side of the thin plate, the second connecting plates 313 drive the guide post 319 to move against the pressure of the second spring 314. The guide post 319 contacts the contact sensor 318 until the pressing stops, so as to center and clamp the thin plate.

[0025] like Figure 5 and Figure 8 As shown, specifically, a fourth sliding groove 411 is provided on the side of the first connecting plate 116. A rotating second lead screw nut shaft 413 is provided inside the fourth sliding groove 411. A second lead screw nut fixing seat 412 is threadedly connected to the second lead screw nut shaft 413. A limiting block 414 is fixedly provided on the upper side of the first connecting plate 116 to limit the second lead screw nut fixing seat 412. Two fixing posts 611 are fixedly installed on the bottom side of the sliding block 212. A third spring 612 is fixedly installed at the lower end of the fixing post 611. A connecting sleeve 613 is slidably installed inside the fixing post 611. The lower end of the third spring 612 is fixedly installed on the side of the connecting sleeve 613. The pressing block 614 is fixedly installed at the lower end of the two connecting sleeves 613.

[0026] More specifically, when the second lead screw nut shaft 413 rotates, it drives the second lead screw nut fixing seat 412 to move, and the third spring 612 presses the connecting sleeve 613, and the connecting sleeve 613 presses the pressing block 614 to press and fix the thin plate.

[0027] A welding method using a thin plate welding equipment includes the following steps: Step 1: Place two thin plates inside the mounting blocks 115 on both sides respectively, and support the thin plates through the first connecting plate 116; Step 2: Start the second servo motor 322 to drive the first lead screw nut shaft 323 to rotate, which will drive the first lead screw nut fixing seat 321 in the clamping structure on both sides to move towards each other, so that the second sliding plate 315 presses the side of the thin plate. When the guide post 319 triggers the contact sensor 318, the movement stops, and the automatic centering and clamping of the thin plate is completed. Step 2.1: The thin plate is pressed tightly against the inner bottom surface of the mounting block 115 by the pressing block 614 under the elastic force of the third spring 612; Step 3: Adjust the welding posture according to the required butt joint angle of the two thin plates; Step 3.1: If it is a horizontal connection, the sliding frame 114 moves on the electric slide table 113 to make the two mounting blocks 115 on the same plane. The second lead screw nut shaft 413 rotates to drive the second lead screw nut fixing seat 412 to move. The compression spring 236 pushes the sliding block 212 and the thin plate to make fine adjustment of the seam, so that the two sliding blocks 212 are aligned with each other. Step 3.2: If it is an angled docking, the electric slide table 113 is driven by the first servo motor to swing within the support plate 112 to a preset angle, and the sliding block 212 is driven by the telescopic device 231 to move down to the top of the thin plate for side support. Step 4: Connect the external cold air source to the connecting pipe 215 through the flexible hose, and the cold air will be discharged through the guide groove 213 and the adapter hole 214; Step 4.1: When the two sliding blocks 212 are horizontally aligned, the two adapter holes 214 are spliced ​​together to form a downward circular through hole, and the cold air blows directly downwards into the welding area; Step 4.2: When the two sliding blocks 212 approach each other at an angle, the first sliding plate 222 pops out under the action of the first spring 223 and fits together, forming a cold air channel with the two sliding blocks 212 and the two thin plates. The cold air is concentrated and discharged from both ends of the channel. Step 5: Adjust the height of the welding gun 513 using the lifting frame 511, and control the movement trajectory of the welding gun 513 using the automatic moving frame 512 to perform welding operations at the joint of the two thin plates.

[0028] Working principle: The second servo motor 322 is started, driving the first lead screw nut shaft 323 to rotate. Since the first lead screw nut fixing seats 321 on the two clamping structures are connected to the first lead screw nut shaft 323 in opposite spirals, when the first lead screw nut shaft 323 rotates, it drives the clamping structures on both sides to move synchronously towards the center. The second sliding plate 315 first contacts the side of the thin plate. As the thrust continues to increase, the second connecting plate 313 continues to move against the elastic force of the second spring 314, causing the guide post 319 to slide relative to each other in the guide hole 316 and gradually approach the contact sensor 318 on the side of the mounting bracket 317. When the guide post 319 triggers the contact sensor 318, the system controls the second servo motor 322 to stop running, and the clamping structures on both sides stop applying pressure synchronously. This completes the automatic centering and clamping of the thin plate. Simultaneously, the pressing block 614 on the bottom side of the sliding block 212, under the elastic action of the fixed column 611, the third spring 612, and the connecting sleeve 613, tightly presses the upper surface of the thin plate against the inner bottom surface of the mounting block 115, ensuring the thin plate maintains stable posture during subsequent movement and welding. The posture is adjusted according to the docking requirements of the two thin plates. When horizontal butt welding is required, the sliding frame 114 slides on the electric slide table 113, moving the mounting block 115 and the thin plate to the approximate docking position. Then, the second lead screw nut shaft 413 is driven to rotate, causing the second lead screw nut fixing seat 412, threaded onto it, to move along the fourth slide groove 411. The second lead screw nut fixing seat 412... The compression spring 236 pushes the sliding block 212 and the thin plate to make precise fine-tuning displacement. When angled butt welding is required, the first servo motor fixedly installed on the side of the support plate 112 drives the electric slide 113 to swing inside the support plate 112, so that the mounting block 115 and the thin plate are tilted to a preset angle. Then, the sliding block 212 is driven to move downward to above the thin plate, forming a stable support for the side of the thin plate. When the two sliding blocks 212 are on the same plane and close to each other, the semi-circular adapter holes 214 on the side of the sliding blocks 212 are spliced ​​together to form a complete downward circular through hole. After the external cold air enters the guide groove 213 through the connecting pipe 215, part of the cold air is discharged from both sides of the guide groove 213, and the other part of the cold air is discharged from the guide groove 213. Air flows directly downwards through a circular through-hole formed by two adapter holes 214, providing direct cooling to the weld area. When the two sliding blocks 212 approach each other at a certain angle, the first sliding plate 222 inside the mounting cavity 221 is ejected outwards by the elastic force of the first spring 223. The first sliding plates 222 on the two sliding blocks 212 then come into contact with each other. At this time, the two first sliding plates 222, the sides of the two sliding blocks 212, and the space between the two thin plates together form a semi-enclosed cooling air channel with only two open ends. After the cooling air is ejected upwards through the guide groove 213, it is blocked and constrained by the first sliding plates 222, and forced to be discharged from both ends of the channel. This provides efficient and concentrated cooling to the weld area where the plates are angled together. After completing the attitude adjustment and cooling air path preparation,The working height of the welding gun 513 is adjusted by the lifting frame 511, and the lateral movement trajectory of the welding gun 513 is controlled by the automatic moving frame 512, allowing the welding gun 513 to precisely weld along the butt joint of the two thin plates. During the welding process, cold air continuously forces cooling of the weld and heat-affected zone through the channels constructed by the guiding and restricting structures, effectively suppressing thermal deformation of the thin plates caused by the accumulation of welding heat. After welding is completed, all drive mechanisms reset, and the welded product can be removed.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A thin plate welding device, comprising a base plate (111), characterized in that: Two swayable electric slides (113) are provided above the base plate (111) to adjust the joint angle of the thin plates. Fixed support plates (112) are provided on both sides of the upper end of the base plate (111) corresponding to the electric slides (113). The electric slides (113) are driven by a first servo motor fixedly installed on the side of the support plate (112) to rotate inside the support plate (112) to achieve angle swing. A sliding frame (114) for driving the thin plate to make initial position adjustment is slidably installed above the electric slides (113). A fixed mounting block (115) is provided above the sliding frame (114). A mounting groove (211) is opened on the upper side of the mounting block (115). A sliding block (212) that can move up and down to support or make way for the side of the thin plate is provided inside the mounting groove (211). A guide for the flow of cold air is opened inside the sliding block (212). The structure includes a mounting cavity (221) on the side of the sliding block (212), a limiting structure for constraining the direction of cold air flow to form a concentrated cooling channel when the plates are joined at an angle, two clamping structures for constraining the thin plates on both sides to achieve automatic centering clamping, a second screw nut fixing seat (412) for pushing and fine-tuning the thin plates to make the joint gap uniform, a pressing block (614) for pressing the thin plates to ensure that they fit tightly against the inner side of the mounting block (115), a welding structure for welding the joined plates is provided between the two mounting blocks (115) on the top of the base plate (111), and a first connecting plate (116) for supporting the bottom of the thin plates to prevent sagging is provided on the side of the mounting block (115).

2. The thin plate welding equipment according to claim 1, characterized in that, The guiding structure includes a guide groove (213) on the side of the sliding block (212). The side of the sliding block (212) is provided with an adapter hole (214) that communicates with the inside of the guide groove (213) at equal intervals corresponding to the position of the guide groove (213). The adapter hole (214) has a semi-circular cross section. Two connecting pipes (215) are fixedly installed on the upper end of the sliding block (212).

3. The thin plate welding equipment according to claim 2, characterized in that, The limiting structure includes a first sliding plate (222) slidably installed inside the mounting cavity (221), a first spring (223) fixedly installed on one side of the first sliding plate (222), the end of the first spring (223) away from the first sliding plate (222) fixedly installed on the inner side of the mounting cavity (221), a compression spring (236) fixedly installed on the side of the sliding block (212), the end of the compression spring (236) away from the sliding block (212) slidably installed on the side of the second lead screw nut fixing seat (412), a first sliding groove (234) is provided on the upper side of the sliding block (212), a telescopic device (231) is fixedly installed on the upper side of the mounting block (115), a connecting block (232) is fixedly installed at the output end of the telescopic device (231), a connecting rod (233) is fixedly installed on the side of the connecting block (232), and a first slider (235) slidably installed inside the first sliding groove (234) is fixedly installed on the side of the connecting rod (233).

4. The thin plate welding equipment according to claim 3, characterized in that, The clamping structure includes two second sliding grooves (311) formed inside the mounting block (115). A second slider (312) is slidably mounted inside each of the two second sliding grooves (311). A second connecting plate (313) is fixedly mounted on the upper side of each of the two second sliders (312). A second sliding plate (315) is slidably mounted on the side of the second connecting plate (313). A fixed second spring (314) is provided between the second connecting plate (313) and the second sliding plate (315). A guide hole (316) is provided on the side of the second sliding plate (315). A fixed guide post (319) is provided on the side of the second connecting plate (313) corresponding to the position of the guide hole (316). The second sliding plate (315) is located away from the second connecting plate. A mounting bracket (317) is fixedly installed on one side of the plate (313). A fixed contact sensor (318) is set on the side of the mounting bracket (317) corresponding to the position of the guide post (319). A third slide groove (324) is opened on the bottom side of the mounting block (115). A sliding first lead screw nut fixing seat (321) is set on the bottom side of the second sliding plate (315) corresponding to the third slide groove (324). A second servo motor (322) is fixedly installed on the side of the mounting block (115). A first lead screw nut shaft (323) is fixedly installed at the output end of the second servo motor (322). Two first lead screw nut fixing seats (321) on the two clamping structures are connected to the first lead screw nut shaft (323) in opposite spirals.

5. A thin plate welding equipment according to claim 4, characterized in that, The first connecting plate (116) has a fourth sliding groove (411) on its side. The fourth sliding groove (411) is provided with a rotating second lead screw nut shaft (413). The second lead screw nut fixing seat (412) is threadedly connected to the second lead screw nut shaft (413). The upper side of the first connecting plate (116) is fixedly provided with a limiting block (414) to limit the second lead screw nut fixing seat (412).

6. The thin plate welding equipment according to claim 5, characterized in that, Two fixed posts (611) are fixedly installed on the bottom side of the sliding block (212). A third spring (612) is fixedly installed at the lower end of the fixed post (611). A connecting sleeve (613) is slidably installed inside the fixed post (611). The lower end of the third spring (612) is fixedly installed on the side of the connecting sleeve (613). The pressing block (614) is fixedly installed at the lower end of the two connecting sleeves (613).

7. A thin plate welding equipment according to claim 6, characterized in that, The welding structure includes a lifting frame (511) fixedly installed on the upper side of the base plate (111), a fixed automatic moving frame (512) is provided above the lifting frame (511), and a sliding welding gun (513) is provided on the automatic moving frame (512).

8. A welding method using the thin plate welding equipment of claim 7, characterized in that, Includes the following steps: Step 1: Place the two thin plates inside the mounting blocks (115) on both sides respectively, and support the thin plates through the first connecting plate (116); Step 2: Start the second servo motor (322) to drive the first lead screw nut shaft (323) to rotate, which will drive the first lead screw nut fixing seat (321) in the clamping structure on both sides to move towards each other, so that the second sliding plate (315) presses the side of the thin plate. When the guide post (319) triggers the contact sensor (318), the movement stops, and the automatic centering and clamping of the thin plate is completed. Step 2.1: Press the thin plate firmly against the inner bottom surface of the mounting block (115) by the extrusion block (614) under the elastic force of the third spring (612); Step 3: Adjust the welding posture according to the required butt joint angle of the two thin plates; Step 3.1: If it is a horizontal butt joint, the sliding frame (114) moves on the electric slide table (113) to make the two mounting blocks (115) be on the same plane. The second lead screw nut shaft (413) rotates to drive the second lead screw nut fixing seat (412) to move. The compression spring (236) pushes the sliding block (212) and the thin plate to make fine adjustment of the seam so that the two sliding blocks (212) are aligned with each other. Step 3.2: If it is an angled docking, the electric slide (113) is driven by the first servo motor to swing to the preset angle in the support plate (112), and the sliding block (212) is driven to move down to the top of the thin plate for side support by the telescopic device (231). Step 4: Connect the external cold air source to the connecting pipe (215) through a flexible hose, and the cold air is discharged through the guide groove (213) and the adapter hole (214); Step 4.1: When the two sliding blocks (212) are horizontally aligned, the two adapter holes (214) are joined to form a downward circular through hole, and the cold air blows directly downward into the welding area; Step 4.2: When the two sliding blocks (212) approach each other at an angle, the first sliding plate (222) pops out under the action of the first spring (223) and fits together, forming a cold air channel with the two sliding blocks (212) and the two thin plates, and the cold air is concentrated and discharged from both ends of the channel. Step 5: Adjust the height of the welding gun (513) by lifting frame (511), and control the movement trajectory of the welding gun (513) by automatic frame shifting (512) to perform welding operation at the joint of the two thin plates.

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