Laser welding production line for television backboard
By combining extrusion structure, multi-point clamping and multi-degree-of-freedom welding mechanism, the efficiency and quality problems of existing laser welding production lines under the conditions of material size fluctuation and assembly gap are solved, realizing high-precision automated welding and continuous production of TV back panels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-16
- Publication Date
- 2026-05-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing laser welding production lines are inefficient in handling fluctuations in incoming material dimensions and assembly gaps, resulting in unstable welding quality, a lack of equipment coordination, and difficulty in dynamically compensating for welding defects.
The extrusion structure, in conjunction with the screw drive mechanism, enables adaptive positioning of the back plate. The multi-point coordinated pressing of the first and second pressing structures eliminates material gaps and welding deformation. The multi-degree-of-freedom motion of the welding structure is coupled with the sliding rod and rack and pinion mechanism to achieve immediate welding after pressing. The auxiliary conveying structure is linked with the active conveying structure to achieve automatic and stable transport of the workpiece.
It achieves high-precision centering and positioning of the backplate, improves the stability of welding quality, shortens the production cycle, eliminates manual intervention, and realizes the automation and efficient collaboration of the intelligent welding production line.
Smart Images
Figure CN122007627A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding production line for television back panels. Background Technology
[0002] In the manufacturing process of television back panels, especially those with a U-shaped structure, the welding of reinforcing ribs is a key step in ensuring the structural strength and dimensional accuracy of the product.
[0003] Existing laser welding production lines are mostly semi-automated or functionally discrete equipment. When dealing with fluctuations in incoming material dimensions and assembly gaps between reinforcing ribs and the backplate body, they often rely on manual visual alignment and manual clamping, which is inefficient and results in highly unstable welding quality. Traditional welding production lines typically separate multiple processes such as backplate positioning, reinforcing rib clamping, welding, and material unloading, resulting in a lack of effective coordination between equipment and a lengthy production cycle. Existing equipment usually uses a fixed clamping mechanism during the welding process, and its clamping force is difficult to adjust in real time according to the actual fit between the backplate and the reinforcing rib. When the welding point undergoes slight deformation due to heat, this rigid structure is not easy to achieve dynamic compensation of the gap, which can easily lead to welding defects such as incomplete welds. Therefore, we propose a laser welding production line for television backplates. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, the present invention provides the following technical solution: a laser welding production line for a television back panel, comprising a fixed base, two fixed support columns above the fixed base, a fixed first fixed plate above the two support columns, a guide cavity for providing a welding channel at the center of the first fixed plate, a movable connecting frame below the first fixed plate, a first pressing structure for pressing the side of a reinforcing rib and a second pressing structure for pressing the top surface of the reinforcing rib on the bottom side of the connecting frame, a sliding moving rod below the connecting frame, and a swinging frame on the side of the moving rod that reciprocates as the connecting frame moves up and down. The swinging frame supports the television back panel from the bottom after swinging, and the sides of the swinging frame are respectively fixedly installed with components that cooperate with the first pressing structure and the second pressing structure. The first support block and the second support block, the lower part of the connecting frame are provided with an auxiliary conveying structure for assisting in the transport of the TV back panel after welding. The side of the first support block is provided with an active conveying structure for driving the movement of the TV back panel. The bottom side of the first fixed plate is provided with two movable welding structures. The welding structures are used to spot weld the joint between the reinforcing rib and the back panel under the pressure state. One end of the moving rod is provided with a pressing structure. The pressing structure is provided with a rotating third pressing block. The pressing structure is used to push the two sides of the TV back panel to achieve center positioning. The third pressing block is used to swing to press the inclined surface of the reinforcing rib when the first pressing structure is pressed down. The upper end of the fixed base is symmetrically provided with two guide rods for supporting the TV back panel. The lower end of the guide rod is fixedly installed with two fixed rods. The end of the fixed rod away from the guide rod is fixedly installed on the upper side of the fixed base.
[0005] As a preferred embodiment of the present invention, a sliding groove is provided on the side of the moving rod, two sliding rods are slidably installed on the bottom side of the connecting frame, one end of the sliding rod passes through the sliding groove and a rack is fixedly installed downward, two fixed frames are fixedly installed on the side of the moving rod, a rotating shaft is rotatably installed on the side of the two fixed frames, a gear that meshes with the rack is fixedly installed between the two rotating shafts, and a swing frame is fixedly installed on the side of the rotating shaft.
[0006] As a preferred embodiment of the present invention, a fixed mounting bracket is provided at the upper end of the first fixed plate corresponding to the guide cavity, and a second telescopic device is fixedly installed on the bottom side of the mounting bracket corresponding to the guide cavity. The output end of the second telescopic device is fixedly installed at the upper end of the connecting bracket. The welding structure includes two electric slide rails installed on the first fixed plate. A slide plate is slidably installed inside the electric slide rails. A first servo motor is fixedly installed on the side of the slide plate. A third rotating column is fixedly installed at the output end of the first servo motor. A connecting plate is fixedly installed on the side of the third rotating column. A fixed first telescopic device is provided on the side of the connecting plate. A laser welder is fixedly installed at the output end of the first telescopic device.
[0007] As a preferred embodiment of the present invention, the extrusion structure includes a swing block rotatably mounted on the end face of a moving rod. A fixed second servo motor is provided on the side of the moving rod corresponding to the position of the swing block. The output end of the second servo motor is fixedly mounted on the side of the swing block. A circular groove is provided on the side of the swing block. A torsion spring is fixedly installed inside the circular groove on the side of the swing block. A swing shaft is fixedly installed at one end of the torsion spring. A third pressure block is fixedly mounted on the side of the swing shaft.
[0008] As a preferred embodiment of the present invention, the first pressing structure includes a first fixed barrel corresponding to the position of the third pressing block on the bottom side of the connecting frame. A first sliding cylinder is slidably installed inside the first fixed barrel. A first pressing block is fixedly installed on the bottom side of the first sliding cylinder. Two limiting blocks are fixedly installed on the bottom side of the first pressing block. A first spring is fixedly installed on the upper end of the first pressing block. The upper end of the first spring is fixedly installed on the inner side of the first fixed barrel.
[0009] As a preferred embodiment of the present invention, the second pressing structure includes a second fixed barrel fixedly installed on the bottom side of the connecting frame, a sliding block movably installed inside the second fixed barrel, a second spring fixedly installed at the upper end of the sliding block, the upper end of the second spring fixedly installed inside the second fixed barrel, and a second pressing block fixedly installed at the bottom side of the sliding block.
[0010] As a preferred embodiment of the present invention, the auxiliary conveying structure includes a first connecting rod fixedly installed on the side of the sliding rod, a second sliding cylinder fixedly installed on the upper end of the first connecting rod, a second fixing block slidably installed inside the second sliding cylinder, a third spring fixedly installed on the lower end of the second fixing block, the lower end of the third spring fixedly installed on the side of the first connecting rod, an electric slide table fixedly installed on the upper end of the second fixing block, and a rotating first rotating column arranged above the electric slide table. The active conveying structure includes a second connecting rod fixedly installed on the side of the first support block, a second mounting block fixedly installed on the side of the second connecting rod, a third servo motor fixedly installed on the end face of the second mounting block, a rotating second rotating column arranged inside the second mounting block, and the output end of the third servo motor fixedly installed on the end face of the second rotating column.
[0011] As a preferred embodiment of the present invention, a first fixing block is fixedly installed on the upper end of the fixed base, and a first mounting block is fixedly installed on the upper end of the first fixing block. Two sliding plates are slidably installed inside the first mounting block. The two sliding plates are respectively fixedly connected to the bottom side of the two moving rods. Two lead screw nuts are fixedly installed on the bottom side of the sliding plates. A second fixing plate is fixedly installed on the bottom side of the first mounting block. A rotary motor is fixedly installed on the side of the second fixing plate. A lead screw is fixedly installed at the output end of the rotary motor. The lead screw is threadedly connected to the inside of the two lead screw nuts.
[0012] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention achieves centering and adaptive positioning of the backplate through the cooperation of the extrusion structure and the lead screw transmission mechanism, solving the problem of inconsistent welding reference caused by material position deviation. The extrusion structure in this production line includes a swing block rotatably mounted on the end face of the moving rod, and a second servo motor that drives the swing block to swing. After the TV backplate is placed above the guide rod, the rotary motor drives the lead screw to rotate. Through the threaded engagement with the lead screw nut, it precisely controls the two sliding plates to drive the two moving rods to move synchronously in opposite directions, so that the swing block and the two sides of the backplate maintain a preset gap. Subsequently, the second servo motor controls the swing block to swing synchronously, applying a uniform thrust to the two sides of the backplate to complete the precise centering of the backplate. Through the precise transmission cooperation of the lead screw and the lead screw nut, the high-precision synchronous movement of the two moving rods is achieved, providing a stable foundation for centering. Combined with the active swing extrusion of the swing block, it can adapt to backplates of different widths and specifications, eliminating welding reference errors caused by material position deviation, ensuring the positional accuracy of subsequent reinforcing rib placement and welding, and completing the positioning without manual intervention. This provides the starting conditions for the automated operation of the entire intelligent welding production line.
[0013] 2. This invention achieves lateral and vertical compression of the reinforcing ribs through the multi-point synergistic action of the first pressing structure, the second pressing structure, and the swing frame, effectively eliminating material gaps and welding deformation. The first pressing structure in this production line includes a first fixed barrel, a first spring, and a first pressing block; the second pressing structure includes a second fixed barrel, a second spring, and a second pressing block. When the connecting frame moves downwards, the first pressing block, through the buffering force of the first spring, presses down on the third pressing block, causing the third pressing block to swing around the swing axis, applying continuous and flexible pressure to the inclined surface of the reinforcing rib from the side. Simultaneously, the second pressing block, under the action of the second spring, moves from the vertical direction... The top of the reinforcing rib is pressed tightly. Through the elastic elements of the first and second springs, the first and second pressing blocks can adjust the pressing force according to the actual fit between the reinforcing rib and the back plate, achieving flexible contact and adaptively eliminating assembly gaps caused by fluctuations in the incoming material size. At the same time, the swing frame swings into place under the linkage of the rack and pinion, providing stable support from the bottom of the back plate. This multi-point, multi-directional pressing method ensures that the welding area remains tightly fitted during the welding process. Even under the heat-affected zone of welding, it can dynamically compensate for deformation, improve welding quality, and fully demonstrate the adaptive capability of the intelligent welding production line.
[0014] 3. This invention achieves intelligent control for immediate welding after clamping by coupling the multi-degree-of-freedom motion of the welding structure with the actions of the sliding rod and rack and pinion mechanism, thus shortening the production cycle. The welding structure in this production line includes an electric slide rail mounted on a first fixed plate. A sliding plate is slidably installed inside the electric slide rail. A laser welder is connected to the sliding plate via a first servo motor and a first telescopic device. When the connecting frame is pressed down, it drives the rack to move vertically, and then drives the swing frame through the gear to complete the bottom support. The welding structure then starts, and the sliding plate slides on the electric slide rail to the preset welding position. The first servo motor adjusts according to the welding path. The angle of the laser welder is precisely controlled by the first telescopic device, which controls the welding distance. Through the downward pressing action of the connecting frame and the mechanical linkage of the rack and gear, the clamping process and the support process are directly coupled at the mechanical level, simplifying the control sequence. The multi-degree-of-freedom motion capability of the laser welder enables it to accurately reach each clamping point for spot welding. This close connection between the clamping and welding processes ensures that the welding operation is carried out immediately under the optimal clamping state, avoiding gap rebound caused by time delay or secondary positioning. This improves the response speed and welding reliability of the production line and constitutes a link in the efficient collaboration of the intelligent welding production line.
[0015] 4. This invention achieves automatic and stable transport of workpieces after welding through the linkage design of auxiliary and active conveying structures, eliminating waiting time and manual intervention between processes. The auxiliary conveying structure in this production line includes a first connecting rod linked to the sliding rod, an electric slide table, and a first rotating column. The active conveying structure includes a second connecting rod linked to the swing frame and a second rotating column driven by a third servo motor. When the welding process is completed and the connecting frame moves upward to reset, the sliding rod moves upward synchronously, driving the gear to rotate in the opposite direction through the rack, causing the swing frame to swing back. This action drives the second connecting rod to make the second rotating column press against the back panel of the TV from the side. At the same time, the first connecting rod... The rod drives the first rotating column to contact the back panel from the bottom and provide support. Then, the third servo motor starts and drives the second rotating column to rotate. In cooperation with the first rotating column, the TV back panel is smoothly transferred to the next station. Through the linkage between the sliding rod and the swing frame, the reset action of the pressing mechanism is converted into the engagement action of the conveying mechanism, realizing the switch from welding state to conveying state. The electric slide can adjust the position of the first rotating column to adapt to back panels of different sizes. This design reduces additional conveying drive components and eliminates the waiting time required for manual or independent robotic arms to unload materials after welding in traditional production lines, realizing the continuous internal logistics of the intelligent welding production line. 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 first fixing plate structure of the present invention; Figure 3This is a schematic diagram of the connecting frame structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the movable rod structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the laser welder structure of the present invention; Figure 8 This is a schematic diagram of the first fixed bucket structure of the present invention; Figure 9 This is a schematic diagram of the second fixed bucket structure of the present invention; Figure 10 This is a schematic diagram of the third pressing block structure of the present invention.
[0017] Wherein: 111, fixed base; 112, support column; 113, first fixed plate; 114, fixed rod; 115, guide rod; 121, electric slide rail; 122, sliding plate; 123, connecting plate; 124, first telescopic device; 125, laser welder; 126, first servo motor; 127, third rotating column; 211, guide cavity; 212, mounting bracket; 213, second telescopic device; 214, connecting bracket; 215, sliding rod; 216, rack; 221, moving rod; 222, swing frame; 223, first support block; 224, second support block; 231, sliding groove; 232, fixed bracket; 233, rotating shaft; 234, gear; 241, first fixed block; 242, first mounting block; 243, sliding plate; 24 4. Lead screw nut; 245. Second fixed plate; 246. Rotary motor; 247. Lead screw; 251. Swing block; 252. Swing shaft; 253. Torsion spring; 254. Third pressure block; 255. Second servo motor; 256. First fixed barrel; 257. First sliding cylinder; 258. First spring; 259. First pressure block; 2510. Limiting block; 261. Second fixed barrel; 262. Sliding block; 263. Second spring; 264. Second pressure block; 311. First connecting rod; 312. Electric slide table; 313. First rotating column; 321. Second connecting rod; 322. Second mounting block; 323. Second rotating column; 324. Third servo motor; 331. Second fixed block; 332. Second sliding cylinder; 333. Third spring. 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 10As shown, a laser welding production line for a television back panel includes a fixed base 111. Two fixed support columns 112 are positioned above the fixed base 111. A fixed first fixing plate 113 is positioned above the two support columns 112. A guide cavity 211 is formed at the center of the first fixing plate 113. A movable connecting frame 214 is positioned below the first fixing plate 113. A first pressing structure and a second pressing structure are provided on the bottom side of the connecting frame 214. A sliding moving rod 221 is positioned below the connecting frame 214. A swing frame 222 is provided on the side of the moving rod 221, which reciprocates as the connecting frame 214 moves up and down. The sides of the swing frame 222 are respectively fixedly mounted with the first pressing structure and the second pressing structure. The first support block 223 and the second support block 224 cooperate with each other. An auxiliary conveying structure is provided below the connecting frame 214. An active conveying structure is provided on the side of the first support block 223. Two movable welding structures are provided on the bottom side of the first fixed plate 113. One end of the moving rod 221 is provided with a pressing structure. A rotating third pressing block 254 is provided on the pressing structure. Two guide rods 115 are symmetrically provided on the upper end of the fixed base 111. Two fixed rods 114 are fixedly installed on the lower end of the guide rods 115. The end of the fixed rod 114 away from the guide rod 115 is fixedly installed on the upper side of the fixed base 111. A sliding groove 231 is opened on the side of the moving rod 221. Two sliding rods 215 are slidably installed on the bottom side of the connecting frame 214. One end of the 15 slides through the sliding groove 231 and is fixedly mounted downwards with a rack 216. Two fixed brackets 232 are fixedly mounted on the side of the moving rod 221. Rotating shafts 233 are rotatably mounted on the sides of the two fixed brackets 232. A gear 234 that meshes with the rack 216 is fixedly mounted between the two rotating shafts 233. The swing frame 222 is fixedly mounted on the side of the rotating shaft 233. A fixed mounting bracket 212 is provided at the upper end of the first fixed plate 113 corresponding to the position of the guide cavity 211. A second telescopic device 213 is fixedly mounted on the bottom side of the mounting bracket 212 corresponding to the position of the guide cavity 211. The output end of the second telescopic device 213 is fixedly mounted at the upper end of the connecting frame 214. The welded structure includes two electric slide rails 12 mounted on the first fixed plate 113. 1. A sliding plate 122 is slidably installed inside the electric slide rail 121. A first servo motor 126 is fixedly installed on the side of the sliding plate 122. A third rotating column 127 is fixedly installed at the output end of the first servo motor 126. A connecting plate 123 is fixedly installed on the side of the third rotating column 127. A fixed first telescopic device 124 is provided on the side of the connecting plate 123. A laser welder 125 is fixedly installed at the output end of the first telescopic device 124. A first fixing block 241 is fixedly installed at the upper end of the fixed base 111. A first mounting block 242 is fixedly installed at the upper end of the first fixing block 241. Two sliding plates 243 are slidably installed inside the first mounting block 242. The two sliding plates 243 are respectively fixedly connected to the bottom side of the two moving rods 221.Two lead screw nuts 244 are fixedly installed on the bottom side of the sliding plate 243. A second fixing plate 245 is fixedly installed on the bottom side of the first mounting block 242. A rotary motor 246 is fixedly installed on the side of the second fixing plate 245. A lead screw 247 is fixedly installed at the output end of the rotary motor 246, and the lead screw 247 is threaded into the inside of the two lead screw nuts 244.
[0020] More specifically, the TV back panel is placed above the two guide rods 115. The guide rods 115 are moved above the first fixed plate 113 by the gripper. The position of the moving rods 221 is adjusted to create a gap between the two moving rods 221 and the TV back panel. Then, the pressing structure is rotated synchronously to press the TV back panel, aligning it. A robotic arm then places the reinforcing ribs on the TV back panel, and the connecting frame 214 is moved downwards. 4. When moving downwards, the swing frame 222 rotates. At this time, the bottom side of the TV back panel is supported by the guide rod 115. When the connecting frame 214 moves downwards, the first pressing structure drives the third pressure block 254 to swing and squeeze the side of the reinforcing rib. The second pressing structure squeezes the top side of the reinforcing rib. After the swing frame 222 swings, it finally squeezes the bottom side of the TV back panel. Then, the welding structure is used to spot weld the squeezed position of the TV back panel to adapt to the welding of the reinforcing rib of the Z-shaped TV back panel. The material gap is eliminated adaptively. After welding, the connecting frame 214 is moved and the swing frame 222 swings back. At this time, the auxiliary conveying structure contacts the bottom of the TV back panel. The two sides of the TV back panel contact the active conveying structure to drive the TV back panel to move. The movement of the sliding rod 215 is constrained by the sliding groove 231, so that the moving rod 221 and the sliding rod 215 move laterally synchronously. When the sliding rod 215 and the rack 216 move perpendicularly, the gear 234 is driven to swing. The gear 234 drives the swing frame 222 to swing. The slide plate 122 is slidably set inside the electric slide rail 121. When welding is required, the welding angle of the laser welder 125 is controlled by the first servo motor 126 and the welding position of the laser welder 125 is controlled by the first telescopic device 124 to perform the welding operation. The rotary motor 246 drives the lead screw 247 to rotate. The lead screw 247 rotates inside the two lead screw nuts 244. The clockwise or counterclockwise rotation of the lead screw 247 controls the movement of the two lead screw nuts 244 away from or close to each other.
[0021] like Figure 1 and Figure 10As shown, specifically, the extrusion structure includes a swing block 251 rotatably mounted on the end face of the moving rod 221. A fixed second servo motor 255 is provided on the side of the moving rod 221 corresponding to the position of the swing block 251. The output end of the second servo motor 255 is fixedly mounted on the side of the swing block 251. A circular groove is provided on the side of the swing block 251. A torsion spring 253 is fixedly installed inside the circular groove on the side of the swing block 251. A swing shaft 252 is fixedly installed at one end of the torsion spring 253. A third pressing block 254 is fixedly installed on the side of the swing shaft 252.
[0022] More specifically, the second servo motor 255 controls the swing of the swing block 251. When the two corresponding swing blocks 251 swing, they can squeeze the two sides of the TV back panel to center the TV back panel. When the first pressing structure moves downward, the first pressing structure squeezes the third pressing block 254. The third pressing block 254 squeezes the reinforcing ribs on the side slope of the U-shaped TV back panel to reduce the gap during the welding process.
[0023] like Figure 3 , Figure 8 and Figure 9 As shown, specifically, the first pressing structure includes a first fixed barrel 256 on the bottom side of the connecting frame 214 corresponding to the position of the third pressing block 254. A first sliding cylinder 257 is slidably installed inside the first fixed barrel 256. A first pressing block 259 is fixedly installed on the bottom side of the first sliding cylinder 257. Two limiting blocks 2510 are fixedly installed on the bottom side of the first pressing block 259. A first spring 258 is fixedly installed on the upper end of the first pressing block 259. The upper end of the first spring 258 is fixedly installed on the inner side of the first fixed barrel 256. The second pressing structure includes a second fixed barrel 261 fixedly installed on the bottom side of the connecting frame 214. A sliding block 262 is movably installed inside the second fixed barrel 261. A second spring 263 is fixedly installed on the upper end of the sliding block 262. The upper end of the second spring 263 is fixedly installed on the inner side of the second fixed barrel 261. A second pressing block 264 is fixedly installed on the bottom side of the sliding block 262.
[0024] More specifically, when the connecting frame 214 moves downward, it causes the first fixed barrel 256, the first sliding barrel 257, the first pressure block 259, and the limiting block 2510 to move downward. The first pressure block 259 is pressed by the first spring 258 to press the third pressure block 254 to ensure that the welding position is in a tight fit. When the connecting frame 214 moves downward, it causes the second fixed barrel 261, the sliding block 262, and the second pressure block 264 to move downward. The second pressure block 264 presses the reinforcing rib, so that the reinforcing rib and the TV back panel are in a tight fit to ensure that the welding position is in a tight fit.
[0025] like Figure 3 , Figure 4, Figure 5 and Figure 6 As shown, specifically, the auxiliary conveying structure includes a first connecting rod 311 fixedly installed on the side of the sliding rod 215, a second sliding cylinder 332 fixedly installed on the upper end of the first connecting rod 311, a second fixing block 331 slidably installed inside the second sliding cylinder 332, a third spring 333 fixedly installed on the lower end of the second fixing block 331, the lower end of the third spring 333 fixedly installed on the side of the first connecting rod 311, an electric slide table 312 fixedly installed on the upper end of the second fixing block 331, and a rotating first rotating column 313 arranged above the electric slide table 312. The active conveying structure includes a second connecting rod 321 fixedly installed on the side of the first support block 223, a second mounting block 322 fixedly installed on the side of the second connecting rod 321, a third servo motor 324 fixedly installed on the end face of the second mounting block 322, a rotating second rotating column 323 arranged inside the second mounting block 322, and the output end of the third servo motor 324 fixedly installed on the end face of the second rotating column 323.
[0026] More specifically, when the sliding rod 215 moves upward, it causes the rotating shaft 233 to swing. The rotating shaft 233 drives the second connecting rod 321 to swing, and the second connecting rod 321 drives the second rotating column 323 to contact the side of the TV back panel. Simultaneously, when the sliding rod 215 moves upward, it drives the first connecting rod 311 upward. The first connecting rod 311 drives the electric slide 312 and the first rotating column 313 upward. The first rotating column 313 moves upward and contacts the bottom of the TV back panel to provide support, facilitating the sliding of the TV back panel.
[0027] Working principle: In the initial state, the TV back panel is placed above two guide rods 115 by an external robotic arm or gripper. The guide rods 115 are fixed to the fixed base 111 by a fixing rod 114, providing initial support for the back panel. The rotary motor 246 starts, driving the lead screw 247 to rotate. The lead screw 247 drives two sliding plates 243 to slide towards each other along the first mounting block 242 through two lead screw nuts 244. The sliding plates 243 drive the moving rod 221 to move synchronously, so that the pressing structure at the end of the moving rod 221 maintains a preset gap with the sides of the back panel. Subsequently, the second servo motor 255 drives the swing block 251 to swing synchronously, applying a uniform pushing force to the back panel from both sides to complete the centering and positioning of the back panel. After centering, the external robotic arm accurately places the reinforcing ribs. Placed at the preset welding position on the back panel, the connecting frame 214 moves vertically downward along the guide cavity 211 under the drive of the second telescopic device 213. When the connecting frame 214 moves downward, it drives the sliding rod 215 and the rack 216 to move downward synchronously. The rack 216 meshes with the gear 234 on the rotating shaft 233, driving the gear 234 to rotate the rotating shaft 233. The swing frame 222 swings upward accordingly until the first support block 223 and the second support block 224 on the side of the swing frame 222 respectively abut against the bottom of the back panel, forming a stable bottom support together with the guide rod 115. At the same time, the first pressing structure and the second pressing structure on the bottom side of the connecting frame 214 move downward synchronously. In the first pressing structure, the first pressing block 259 is slowed down by the first spring 258. The impact force presses down on the third pressure block 254, causing it to swing around the swing axis 252 and press against the inclined surface of the reinforcing rib from the side. In the second pressing structure, the second pressure block 264, under the action of the second spring 263, presses against the top surface of the reinforcing rib from the vertical direction. Through the adaptive adjustment of the elastic element, the first pressure block 259 and the second pressure block 264 can automatically adjust the pressing force according to the actual fit between the reinforcing rib and the back plate, eliminating the material gap. After the pressing state is established, the welding structure begins to work. The slide plate 122 slides along the electric slide rail 121 to the preset welding position. The first servo motor 126 adjusts the angle of the laser welder 125 according to the welding path. The first telescopic device 124 precisely controls the welding distance. The laser welder 125 presses against the reinforcing rib and the back plate. Spot welding is performed at the joint of the back panel. During this process, due to the continuous flexible clamping force provided by the first and second pressing structures, the welding area remains in a tight fit. After welding, the connecting frame 214 moves upward and resets under the drive of the second telescopic device 213. The sliding rod 215 and the rack 216 move upward synchronously, driving the swing frame 222 to swing in the opposite direction and reset via the gear 234. When the swing frame 222 resets, it drives the second connecting rod 321 to make the second rotating column 323 press against the TV back panel from the side. At the same time, the first connecting rod 311 drives the electric slide 312 and the first rotating column 313 to move upward, contacting the back panel from the bottom to provide support. The third servo motor 324 starts, driving the second rotating column 323 to rotate and cooperate with the first rotating column 313.The welded TV back panel is smoothly transferred to the next workstation, completing the entire welding cycle. Throughout the process, the lifting motion of the connecting frame 214, through the mechanical linkage of the rack 216 and gear 234, synchronously drives the bottom support action of the swing frame 222, the pressing action of the first and second pressing structures, and the engagement action of the auxiliary and active conveying structures, achieving mechanical coupling and intelligent coordination of the pressing, welding, and conveying processes.
[0028] 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 laser welding production line for a television back panel, comprising a fixed base (111), characterized in that, Two fixed support columns (112) are provided above the fixed base (111). A fixed first fixed plate (113) is provided above the two support columns (112). A guide cavity (211) for providing a welding channel is opened at the center of the first fixed plate (113). A movable connecting frame (214) is provided below the first fixed plate (113). A first pressing structure for pressing the side of the reinforcing rib and a second pressing structure for pressing the top surface of the reinforcing rib are provided on the bottom side of the connecting frame (214). A sliding moving rod (221) is provided below the connecting frame (214). A swing frame (222) is provided on the side of the moving rod (221) to swing back and forth with the up and down movement of the connecting frame (214). The swing frame (222) is used to support the TV back panel from the bottom after swinging. A first support block (223) and a second support block (224) that cooperate with the first pressing structure and the second pressing structure are fixedly installed on the side of the swing frame (222). The connecting frame (214) is provided with an auxiliary conveying structure for assisting in the conveying of the TV back panel after welding. The side of the first support block (223) is provided with an active conveying structure for driving the TV back panel to move. The bottom side of the first fixed plate (113) is provided with two movable welding structures. The welding structures are used to spot weld the joint between the reinforcing rib and the back panel under the pressure state. One end of the moving rod (221) is provided with a pressing structure. The pressing structure is provided with a rotating third pressing block (254). The pressing structure is used to push the two sides of the TV back panel to achieve center positioning. The third pressing block (254) is used to swing to press the inclined surface of the reinforcing rib when the first pressing structure is pressed down. The upper end of the fixed base (111) is symmetrically provided with two guide rods (115) for supporting the TV back panel. The lower end of the guide rod (115) is fixedly installed with two fixed rods (114). The end of the fixed rod (114) away from the guide rod (115) is fixedly installed on the upper side of the fixed base (111).
2. The laser welding production line for television back panels according to claim 1, characterized in that, The moving rod (221) has a sliding groove (231) on its side. Two sliding rods (215) are slidably installed on the bottom side of the connecting frame (214). One end of the sliding rod (215) passes through the sliding groove (231) and is fixedly installed downward with a rack (216). Two fixed frames (232) are fixedly installed on the side of the moving rod (221). Rotating shafts (233) are rotatably installed on the side of the two fixed frames (232). A gear (234) that meshes with the rack (216) is fixedly installed between the two rotating shafts (233). The swing frame (222) is fixedly installed on the side of the rotating shaft (233).
3. A laser welding production line for a television back panel according to claim 2, characterized in that, A fixed mounting bracket (212) is provided at the upper end of the first fixed plate (113) corresponding to the guide cavity (211). A second telescopic device (213) is fixedly installed at the bottom side of the mounting bracket (212) corresponding to the guide cavity (211). The output end of the second telescopic device (213) is fixedly installed at the upper end of the connecting bracket (214). The welding structure includes two electric slide rails (121) installed on the first fixed plate (113). A slide plate (122) is slidably installed inside the electric slide rail (121). A first servo motor (126) is fixedly installed on the side of the slide plate (122). A third rotating column (127) is fixedly installed at the output end of the first servo motor (126). A connecting plate (123) is fixedly installed on the side of the third rotating column (127). A fixed first telescopic device (124) is provided on the side of the connecting plate (123). A laser welder (125) is fixedly installed at the output end of the first telescopic device (124).
4. A laser welding production line for a television back panel according to claim 3, characterized in that, The extrusion structure includes a swing block (251) rotatably mounted on the end face of a moving rod (221). A fixed second servo motor (255) is provided on the side of the moving rod (221) corresponding to the position of the swing block (251). The output end of the second servo motor (255) is fixedly mounted on the side of the swing block (251). A circular groove is provided on the side of the swing block (251). A torsion spring (253) is fixedly installed inside the circular groove on the side of the swing block (251). A swing shaft (252) is fixedly installed at one end of the torsion spring (253). A third pressure block (254) is fixedly mounted on the side of the swing shaft (252).
5. A laser welding production line for a television back panel according to claim 4, characterized in that, The first pressing structure includes a first fixed barrel (256) on the bottom side of the connecting frame (214) corresponding to the position of the third pressing block (254). A first sliding cylinder (257) is slidably installed inside the first fixed barrel (256). A first pressing block (259) is fixedly installed on the bottom side of the first sliding cylinder (257). Two limiting blocks (2510) are fixedly installed on the bottom side of the first pressing block (259). A first spring (258) is fixedly installed on the upper end of the first pressing block (259). The upper end of the first spring (258) is fixedly installed on the inner side of the first fixed barrel (256).
6. A laser welding production line for a television back panel according to claim 5, characterized in that, The second pressing structure includes a second fixed barrel (261) fixedly installed on the bottom side of the connecting frame (214), a sliding block (262) movably installed inside the second fixed barrel (261), a second spring (263) fixedly installed on the upper end of the sliding block (262), the upper end of the second spring (263) fixedly installed on the inner side of the second fixed barrel (261), and a second pressing block (264) fixedly installed on the bottom side of the sliding block (262).
7. A laser welding production line for a television back panel according to claim 6, characterized in that, The auxiliary conveying structure includes a first connecting rod (311) fixedly installed on the side of the sliding rod (215), a second sliding cylinder (332) fixedly installed on the upper end of the first connecting rod (311), a second fixing block (331) slidably installed inside the second sliding cylinder (332), a third spring (333) fixedly installed on the lower end of the second fixing block (331), the lower end of the third spring (333) fixedly installed on the side of the first connecting rod (311), and an electric slide table (312) fixedly installed on the upper end of the second fixing block (331). A rotating first rotating column (313) is provided above the platform (312). The active transmission structure includes a second connecting rod (321) fixedly installed on the side of the first support block (223). A second mounting block (322) is fixedly installed on the side of the second connecting rod (321). A third servo motor (324) is fixedly installed on the end face of the second mounting block (322). A rotating second rotating column (323) is provided inside the second mounting block (322). The output end of the third servo motor (324) is fixedly installed on the end face of the second rotating column (323).
8. A laser welding production line for a television back panel according to claim 7, characterized in that, The upper end of the fixed base (111) is fixedly installed with a first fixed block (241), the upper end of the first fixed block (241) is fixedly installed with a first mounting block (242), the interior of the first mounting block (242) is slidably installed with two sliding plates (243), the two sliding plates (243) are respectively fixedly connected to the bottom side of the two moving rods (221), the bottom side of the sliding plate (243) is fixedly installed with two lead screw nuts (244), the bottom side of the first mounting block (242) is fixedly installed with a second fixed plate (245), the side of the second fixed plate (245) is fixedly installed with a rotary motor (246), the output end of the rotary motor (246) is fixedly installed with a lead screw (247), and the lead screw (247) is threadedly connected to the interior of the two lead screw nuts (244).