Anti-deformation supporting clamp for welding of automobile chassis part

Abstract

The invention discloses an automobile chassis part welding anti-deformation supporting clamp, and relates to the technical field of automobile manufacturing equipment, the automobile chassis part welding anti-deformation supporting clamp comprises a base, and an automatic positioning and pressing mechanism is arranged at the top of the base. According to the anti-deformation supporting clamp for welding of the automobile chassis part, by arranging the automatic positioning and pressing mechanism, the positioning state of the part is automatically monitored, each pressing assembly is provided with a pressure sensor, the pressing force value can be fed back in real time, part deformation caused by too large pressing force is prevented, welding displacement caused by insufficient pressing force is also avoided, and the welding quality is improved. Automatic operation does not need manual repeated adjustment, the labor intensity of operators is greatly reduced, the consistency of positioning and pressing is improved, and the problems that an existing clamp is low in automation degree, positioning and pressing operation of all components need to be completed manually, the manual operation efficiency is low, and in addition, in the use process of the clamp, the manual operation efficiency is low are solved. And the pressing force of each pressing assembly cannot be accurately controlled, so that the product quality is further influenced.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing equipment technology, specifically to a welding anti-deformation support fixture for automobile chassis components. Background Technology

[0002] In the automotive manufacturing industry, the chassis support plate is a key structural component that connects the chassis frame with core components (such as the transmission system and suspension system). Its welding quality directly determines the overall load-bearing strength, stability and safety of the chassis. The chassis support plate is usually assembled by welding ring components, U-shaped components and inclined plate components. The accurate positioning and stable clamping of the components before welding are the core prerequisites for ensuring welding accuracy. Therefore, welding fixtures have become the core production equipment for this process.

[0003] For example, the Chinese announcement number CN217224298U describes a welding fixture for assembling an automobile chassis support plate, which states in its specification that "a welding fixture for assembling an automobile chassis support plate is provided, including a base, an annular positioning and clamping assembly for positioning and clamping an annular component of the automobile chassis support plate is provided at the upper left end of the base, an inclined plate support block for positioning and supporting an inclined plate component of the automobile chassis support plate is provided in the middle of the upper part of the base, and a U-shaped positioning and clamping assembly for positioning and clamping a U-shaped component of the automobile chassis support plate is provided at the upper right end of the base."

[0004] However, the existing devices have the following shortcomings during use: Existing fixtures accurately position various components of the automotive chassis support plate before welding, effectively preventing deformation during welding, ensuring product processing quality, improving work efficiency, reducing scrap parts, and saving costs. While these fixtures are simple in structure, easy to manufacture, and convenient to operate, their automation level is low. All component positioning and clamping operations must be performed manually, increasing the labor intensity of operators. Furthermore, the consistency of manual operation is poor, easily leading to unstable positioning and clamping effects due to human error, affecting welding quality. Simultaneously, the low efficiency of manual operation cannot meet the needs of mass production, hindering production progress. In addition, during use, the clamping force of each clamping component cannot be accurately controlled. Excessive clamping force may cause component deformation, while insufficient clamping force cannot guarantee the stability of the components during welding, further affecting product quality.

[0005] Therefore, we propose a welding anti-deformation support fixture for automotive chassis components to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a welding anti-deformation support fixture for automotive chassis components, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding anti-deformation support fixture for automobile chassis components, comprising a base, an automated positioning and clamping mechanism being provided on the top of the base, and a PLC controller being installed on the top of the base; The automated positioning and clamping mechanism includes a fixed frame, a first bracket, a second bracket, a positioning column, a support block, a positioning block, a laser positioning sensor, an infrared sensor, a visual positioning camera, a second electric push rod, two connecting frames, and a third electric push rod. The laser positioning sensor is used to detect whether the annular component is accurately fitted onto the positioning column. The infrared sensor is used to detect whether the inclined plate component is accurately placed on the support block. The visual positioning camera is used to capture the position of the U-shaped component and determine whether the U-shaped component is accurately placed inside the positioning block. The telescopic end of the second electric push rod movably passes through the first bracket and is fixedly connected to a first pressure sensor. The bottom of the first pressure sensor is fixedly connected to a first pressure plate for clamping the annular component. Two second pressure sensors are fixedly connected to one side of the two connecting frames. Two second pressure plates for clamping the inclined plate component are fixedly connected to one side of the two second pressure sensors. The bottom of the fixed frame is provided with a drive mechanism for driving the two second pressure plates to move synchronously in opposite directions. The telescopic end of the third electric push rod movably passes through the second bracket and is fixedly connected to a third pressure sensor. The bottom of the third pressure sensor is fixedly connected to a third pressure plate for clamping the U-shaped component.

[0008] Preferably, the top of the base is provided with a height adjustment mechanism, the height adjustment mechanism including a first electric push rod fixedly installed on the top of the base, and a fixed plate is fixedly connected to the telescopic end of the first electric push rod.

[0009] Preferably, the top of the base is fixedly connected to two fixing plates, and two sliding grooves are opened on one side of the two fixing plates. Two sliders are slidably connected in the two sliding grooves. The bottom of the fixing plate is fixedly connected to two connecting plates, and the two sliders are fixedly connected to the two connecting plates.

[0010] Preferably, the top of the fixed plate is provided with a welding angle adjustment mechanism. The welding angle adjustment mechanism includes a mounting shell fixedly connected to the top of the fixed plate. A rotating shaft and a drive shaft are rotatably connected inside the mounting shell. The top end of the rotating shaft moves through the mounting shell and is fixedly connected to a rotating plate. The fixing frame is fixedly connected to the top of the rotating plate.

[0011] Preferably, two support plates are fixedly connected inside the mounting housing, and a worm gear is rotatably connected between the two support plates. A worm wheel and a pinion are fixedly sleeved on the outer surface of the drive shaft, and a large gear is fixedly sleeved on the outer surface of the rotating shaft. The worm gear and the worm wheel are meshed together, and the pinion and the large gear are meshed together.

[0012] Preferably, the top of the mounting shell is provided with an annular groove, and the bottom of the rotating disk is provided with multiple support casters. A first servo motor is fixedly installed on one side of one of the support plates, and the output end of the first servo motor movably passes through one of the support plates and is fixedly connected to a worm gear.

[0013] Preferably, the drive mechanism includes four mounting plates fixedly connected to the bottom of the fixed frame, wherein a bidirectional lead screw is rotatably connected between two of the mounting plates, and a guide rod is fixedly connected between the other two mounting plates. Two movable plates are threaded onto the outer surfaces of the bidirectional lead screw and the guide rod. Two connecting frames are fixedly connected to one side of the two movable plates. A second servo motor is fixedly mounted on one side of one of the mounting plates. The output end of the second servo motor movably passes through one of the mounting plates and is fixedly connected to the smooth end of the bidirectional lead screw.

[0014] Preferably, the first bracket and the second bracket are fixedly connected to the top of the fixed frame, the positioning column, the support block, the positioning block, the laser positioning sensor and the infrared sensor are installed on the top of the fixed frame, the second electric push rod is fixedly installed on the top of the first bracket, and the third electric push rod is fixedly installed on the top of the second bracket.

[0015] Preferably, the top of the first pressure plate is fixedly connected to two movable rods, the top ends of the two movable rods extending through the first bracket.

[0016] Preferably, a limiting groove is formed on the inner side of the second bracket, a limiting plate is slidably connected in the limiting groove, the third pressure plate is fixedly connected to the limiting plate, and a touch screen is installed on the top of the base.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes an automated positioning and clamping mechanism. A laser positioning sensor detects in real-time whether the annular component is accurately fitted onto the positioning post; an infrared sensor quickly identifies the placement of the inclined plate component on the support block; and a visual positioning camera uses image recognition to determine whether the U-shaped component fits the inner side of the positioning block. These three types of sensors transmit positioning data to the PLC controller in real-time, achieving automated monitoring of the component's positioning status and avoiding errors from manual visual judgment. Furthermore, the clamping action is driven by a second electric push rod, a third electric push rod, and a drive mechanism. Each clamping component is equipped with a pressure sensor, which provides real-time feedback on the clamping force. When the pressure reaches the preset threshold, the PLC controller automatically stops the push rod or motor, preventing component deformation due to excessive clamping force and avoiding welding displacement caused by insufficient clamping force. Automated operation eliminates the need for repeated manual adjustments, significantly reducing the labor intensity of operators. Furthermore, the consistency of positioning and clamping is improved, meeting the efficiency requirements of mass production and effectively shortening the production cycle. This solves the problems of existing fixtures, which have a low degree of automation, requiring manual operation for all component positioning and clamping, resulting in low efficiency. In addition, the clamping force of each clamping component cannot be accurately controlled during use, further affecting product quality.

[0018] 2. This invention, by setting up a height adjustment mechanism and a welding angle adjustment mechanism, achieves the effect of adapting to different specifications of chassis components and different welding station requirements. Regarding height adjustment, the first electric push rod at the top of the base can drive the fixed plate to move up and down. Combined with the guiding action of the fixed plate groove and the slider, it ensures stable lifting and lowering of the fixed plate. The height of the entire automated positioning and clamping mechanism can be flexibly adjusted according to the height of the welding equipment or the assembly requirements of the components, avoiding inconvenience in welding operations caused by height mismatch. Regarding angle adjustment, the first servo motor inside the mounting housing can drive the worm gear to rotate. Through the meshing of the worm gear and worm wheel, the drive shaft rotates, which in turn causes the small gear to mesh with the large gear, driving the rotating shaft to rotate, ultimately achieving the angle adjustment of the rotating plate. Simultaneously, the support casters at the bottom of the rotating plate roll along the annular groove of the mounting housing, ensuring stability during the angle adjustment process. This allows the chassis components to flexibly adjust their tilt angle during welding, facilitating operation by operators or automated welding equipment in welding dead angles, further improving the integrity of the welding quality.

[0019] 3. By setting up a driving mechanism, the combination of a bidirectional lead screw and a guide rod in the driving mechanism can ensure that the two moving plates move synchronously in opposite directions, ensuring the balance of clamping force on both sides of the inclined plate component. The touch screen on the top of the base can be linked with the PLC controller. Operators can set pressure thresholds, height parameters, angle parameters, etc. through the touch screen without complicated operations, and view the detection data of each sensor and the operating status of the equipment in real time. The human-machine interaction is user-friendly and reduces the operating threshold. Attached Figure Description

[0020] Figure 1 This is a perspective view of the main structure of a welding anti-deformation support fixture for automotive chassis components according to the present invention; Figure 2 This is a perspective view of the right side structure of a welding anti-deformation support fixture for automotive chassis components according to the present invention; Figure 3 This is a perspective view of the rear structure of a welding anti-deformation support fixture for automotive chassis components according to the present invention. Figure 4 This is a partial three-dimensional view of the height adjustment mechanism in a welding anti-deformation support fixture for automotive chassis components according to the present invention; Figure 5 This is a partial sectional perspective view of the mounting shell in a welding anti-deformation support fixture for automotive chassis components according to the present invention. Figure 6 This is a perspective view of the fixing frame in a welding anti-deformation support fixture for automotive chassis components according to the present invention. Figure 7 This is a perspective view of the moving plate in a welding anti-deformation support fixture for automotive chassis components according to the present invention. Figure 8 This is a partial three-dimensional view of the second bracket in a welding anti-deformation support fixture for automotive chassis components according to the present invention.

[0021] In the diagram: 1. Base; 2. Height adjustment mechanism; 201. First electric push rod; 202. Fixed plate; 203. Fixed plate; 204. Slide groove; 205. Slider; 206. Connecting plate; 3. Welding angle adjustment mechanism; 301. Mounting shell; 302. Rotating shaft; 303. Rotary disk; 304. Support plate; 305. Worm gear; 306. Drive shaft; 307. Worm wheel; 308. Small gear; 309. Large gear; 310. Annular groove; 311. Support caster wheel; 312. First servo motor; 4. Automated positioning and clamping mechanism; 401. Fixed frame; 402. First bracket; 403. Second bracket; 404. Positioning column; 405. Support 406. Support block; 407. Positioning block; 408. Laser positioning sensor; 409. Infrared sensor; 410. Visual positioning camera; 411. Second electric push rod; 412. First pressure sensor; 413. First pressure plate; 414. Connecting frame; 415. Second pressure sensor; 416. Second electric push rod; 417. Third pressure sensor; 418. Third pressure plate; 419. Movable rod; 420. Limiting groove; 421. Limiting plate; 5. Drive mechanism; 501. Mounting plate; 502. Bidirectional lead screw; 503. Guide rod; 504. Moving plate; 505. Second servo motor; 6. PLC controller; 7. Touch screen. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-8 As shown, the present invention provides a technical solution: a welding anti-deformation support fixture for automobile chassis components, including a base 1, an automated positioning and clamping mechanism 4 is provided on the top of the base 1, and a PLC controller 6 is installed on the top of the base 1. The automated positioning and clamping mechanism 4 includes a fixed frame 401, a first bracket 402, a second bracket 403, a positioning post 404, a support block 405, a positioning block 406, a laser positioning sensor 407, an infrared sensor 408, a visual positioning camera 409, a second electric push rod 410, two connecting frames 413, and a third electric push rod 416. The laser positioning sensor 407 is used to detect whether the annular component is accurately fitted onto the positioning post 404. The infrared sensor 408 is used to detect whether the inclined plate component is accurately placed on the support block 405. The visual positioning camera 409 is used to capture the position of the U-shaped component and determine whether the U-shaped component is accurately placed inside the positioning block 406. The telescopic end of the second electric push rod 410 extends through the first bracket 401. 02 and a first pressure sensor 411 is fixedly connected. The bottom of the first pressure sensor 411 is fixedly connected to a first pressure plate 412 for pressing the annular component. Two second pressure sensors 414 are fixedly connected to one side of the two connecting brackets 413. Two second pressure plates 415 for clamping the inclined plate component are fixedly connected to one side of the two second pressure sensors 414. The bottom of the fixed bracket 401 is provided with a drive mechanism 5 for driving the two second pressure plates 415 to move synchronously in opposite directions. The telescopic end of the third electric push rod 416 moves through the second bracket 403 and is fixedly connected to a third pressure sensor 417. The bottom of the third pressure sensor 417 is fixedly connected to a third pressure plate 418 for pressing the U-shaped component.

[0024] like Figure 1 and Figure 4As shown, a height adjustment mechanism 2 is provided on the top of the base 1. The height adjustment mechanism 2 includes a first electric push rod 201 fixedly installed on the top of the base 1. The telescopic end of the first electric push rod 201 is fixedly connected to a fixed plate 202. The first electric push rod 201 can drive the fixed plate 202 to drive the automatic positioning and clamping mechanism 4 and the welding angle adjustment mechanism 3 at the top to rise and fall synchronously. On the one hand, it can flexibly adjust the overall height of the fixture according to the working height of the welding equipment (such as a robotic arm or welding torch), avoiding the operator bending over or the welding equipment being unable to be accurately positioned due to height mismatch. On the other hand, it can adjust the initial height of the components during welding according to the assembly requirements of different specifications of automotive chassis components, ensuring that the welding surface of the components is in the optimal operating field of vision, improving the convenience of welding operations. At the same time, the height adjustment is electrically driven, and with the help of the PLC controller 6, it can achieve precise speed control and positioning. Compared with the traditional manual lifting method, the adjustment efficiency is higher and the accuracy is better, and it can avoid the height deviation caused by manual adjustment.

[0025] like Figure 4 As shown, the top of the base 1 is fixedly connected to two fixed plates 203. Two sliding grooves 204 are opened on one side of the two fixed plates 203. Two sliders 205 are slidably connected in the two sliding grooves 204. The bottom of the fixed plate 202 is fixedly connected to two connecting plates 206, and the two sliders 205 are fixedly connected to the two connecting plates 206. When the fixed plate 202 is driven to rise and fall by the first electric push rod 201, the connecting plate 206 at the bottom of the fixed plate 202 drives the sliders 205 to slide along the sliding grooves 204 of the fixed plates 203. The sliding grooves 204 constrain the movement trajectory of the sliders 205, which can effectively prevent the fixed plate 202 from shifting left and right or tilting during the rising and falling process, and ensure that the fixed plate 202 always remains horizontal.

[0026] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a welding angle adjustment mechanism 3 is provided on the top of the fixed disk 202. The welding angle adjustment mechanism 3 includes a mounting shell 301 fixedly connected to the top of the fixed disk 202. A rotating shaft 302 and a drive shaft 306 are rotatably connected inside the mounting shell 301. The top end of the rotating shaft 302 moves through the mounting shell 301 and is fixedly connected to a rotating disk 303. A fixing frame 401 is fixedly connected to the top of the rotating disk 303. When the drive shaft 306 drives the rotating shaft 302 to rotate, the rotating shaft 302 can drive the rotating disk 303 to rotate synchronously, thereby adjusting the welding angle of the chassis components. This avoids the operator or automated equipment from being unable to weld accurately due to angle obstruction. In addition, the mounting shell 301 provides a closed installation space for the rotating shaft 302 and the drive shaft 306, which can prevent welding slag and dust generated during the welding process from entering the transmission structure and reduce the wear of the transmission components.

[0027] like Figure 1, Figure 3 and Figure 5 As shown, two support plates 304 are fixedly connected inside the mounting housing 301. A worm gear 305 is rotatably connected between the two support plates 304. A worm wheel 307 and a pinion 308 are fixedly sleeved on the outer surface of the drive shaft 306. A large gear 309 is fixedly sleeved on the outer surface of the rotating shaft 302. The worm gear 305 and the worm wheel 307 are meshed together, and the pinion 308 and the large gear 309 are meshed together. The meshing transmission between the worm gear 305 and the worm wheel 307 has the characteristics of large reduction ratio and smooth transmission. It can convert the high-speed rotation of the first servo motor 312 into the low-speed smooth rotation of the rotating shaft 302, which facilitates the fine adjustment of the welding angle and meets the requirements of high precision. On the other hand, regarding the angle control requirements, the worm gear 305 and worm wheel 307 mechanism have a self-locking characteristic. This characteristic ensures that after the rotary disk 303 is adjusted to the target angle, it can maintain a fixed angle even without power input, preventing the rotary disk 303 from rotating due to external force during welding and ensuring the stability of the welding angle. In addition, the meshing of the pinion 308 and the large gear 309 further optimizes the transmission ratio. Combined with the precise control of the first servo motor 312, digital control of angle adjustment can be realized. The operator can set the target angle through the touch screen 7, and the PLC controller 6 automatically drives the transmission mechanism to complete the adjustment, which is convenient and highly accurate.

[0028] like Figure 1 , Figure 2 and Figure 5 As shown, the top of the mounting housing 301 has an annular groove 310, and the bottom of the rotating disk 303 is equipped with multiple support casters 311. A first servo motor 312 is fixedly installed on one side of one of the support plates 304. The output end of the first servo motor 312 movably passes through one of the support plates 304 and is fixedly connected to the worm gear 305. By rolling through the annular groove 310 of the support casters 311, auxiliary support can be provided for the rotating disk 303, distributing the weight of the rotating disk 303 and the top components, reducing the axial force on the shaft 302, and preventing the shaft 302 from bending and deforming due to long-term load. At the same time, the annular groove 310 constrains the movement trajectory of the support casters 311, ensuring that the rotating disk 303 always rotates around the center of the shaft 302, avoiding angular deviation caused by eccentric rotation. The first servo motor 312, as a power source, has the advantages of precise speed control and large torque, which can realize rapid response and precise positioning of angle adjustment. With the help of the PLC controller 6, the motor speed and angle can be fed back in real time, ensuring that the angle adjustment error is controlled within a very small range to meet the requirements of high-precision welding.

[0029] like Figure 1 , Figure 6 and Figure 7As shown, the drive mechanism 5 includes four mounting plates 501 fixedly connected to the bottom of the fixed frame 401. A bidirectional lead screw 502 is rotatably connected between two mounting plates 501, and a guide rod 503 is fixedly connected between the other two mounting plates 501. Two movable plates 504 are threaded onto the outer surfaces of the bidirectional lead screw 502 and the guide rod 503. Two connecting frames 413 are fixedly connected to one side of the two movable plates 504. A second servo motor 505 is fixedly mounted on one side of one of the mounting plates 501. The output end of the second servo motor 505 movably passes through one of the mounting plates 501 and is fixedly connected to the smooth end of the bidirectional lead screw 502. When the second servo motor 505 drives the bidirectional lead screw 502 to rotate, the bidirectional lead screw 502... The reverse threads on the outer surface of 02 can drive the two moving plates 504 to move synchronously in the opposite direction along the guide rod 503, and then drive the two second pressure plates 415 to clamp or loosen the inclined plate component through the connecting frame 413. The guide rod 503 constrains the movement trajectory of the moving plates 504, ensuring that the two moving plates 504 always move in parallel, avoiding uneven clamping force caused by the tilting of the second pressure plates 415. At the same time, the second servo motor 505 can achieve precise control of speed and angle through the PLC controller 6, and can adjust the moving distance of the moving plates 504 according to the thickness of the inclined plate component. With the second pressure sensor 414, closed-loop control of clamping force can be achieved, which can prevent the inclined plate component from deforming due to excessive clamping force, and also prevent the component from shifting due to insufficient clamping force.

[0030] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the first bracket 402 and the second bracket 403 are fixedly connected to the top of the fixed frame 401. Positioning pin 404, support block 405, positioning block 406, laser positioning sensor 407, and infrared sensor 408 are installed on the top of the fixed frame 401. The second electric push rod 410 is fixedly installed on the top of the first bracket 402, and the third electric push rod 416 is fixedly installed on the top of the second bracket 403. The first bracket 402 and the second bracket 403 are fixed to the top of the fixed frame 401, forming a stable support structure. The electric push rod 416 provides a fixed installation base. The positioning column 404, support block 405, and positioning block 406 serve as positioning references for the chassis components and are uniformly installed on the top of the fixed frame 401 to ensure the relative position accuracy of each positioning component and provide a guarantee for the precise positioning of the components. The laser positioning sensor 407, infrared sensor 408, and visual positioning camera 409 correspond to the positioning detection of the ring component, inclined plate component, and U-shaped component, respectively, and are installed close to the positioning components to shorten the detection distance, reduce detection errors, and ensure that the sensors can quickly and accurately feedback the positioning status of the components.

[0031] like Figure 1 and Figure 6As shown, two movable rods 419 are fixedly connected to the top of the first pressure plate 412. The top ends of the two movable rods 419 pass through the first bracket 402. When the second electric push rod 410 drives the first pressure plate 412 to move up and down, the movable rods 419 slide synchronously along the through hole of the first bracket 402, which can prevent the first pressure plate 412 from tilting due to unilateral force and ensure that the first pressure plate 412 always remains in a horizontal state. The first pressure sensor 411 is connected to the second electric push rod 410 and the first pressure plate 412, which can provide real-time feedback of the clamping force and cooperate with the PLC controller 6 to realize closed-loop pressure control.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a limiting groove 420 is provided on the inner side of the second bracket 403, and a limiting plate 421 is slidably connected in the limiting groove 420. The third pressure plate 418 is fixedly connected to the limiting plate 421. A touch screen 7 is installed on the top of the base 1. When the third electric push rod 416 drives the third pressure plate 418 to rise and fall, the limiting plate 421 slides along the limiting groove 420 of the second bracket 403, which can prevent the third pressure plate 418 from shifting left and right when pressing the U-shaped component. This ensures that the pressing position of the third pressure plate 418 accurately corresponds to the force point of the U-shaped component, and avoids deformation or displacement of the U-shaped component due to the deviation of the pressing position. Furthermore, the first electric push rod 201, the first servo motor 312, the laser positioning sensor 407, the infrared sensor 408, the visual positioning camera 409, the second electric push rod 410, and the first pressure plate 418 are connected to the limiting plate 421. Force sensor 411, first pressure plate 412, second pressure sensor 414, third electric push rod 416, third pressure sensor 417, second servo motor 505, and touch screen 7 are all connected to PLC controller 6. As the core control unit, PLC controller 6 can receive detection signals from each sensor and synchronously drive each actuator to work together, replacing traditional manual step-by-step operation and realizing full automation of chassis component positioning, clamping, height adjustment, and angle adjustment. With the touch screen 7, operators do not need to manually adjust the parameters of each component; they can complete the operation through the touch screen 7, reducing the operational threshold. In addition, touch screen 7 can display fault information in real time (such as abnormal laser positioning sensor 407 or overload of second servo motor 505), which facilitates operators to quickly troubleshoot problems and reduce equipment downtime.

[0033] The operation and working principle of this device are as follows: During the component placement stage, the operator places the ring component onto the positioning post 404 at the top of the fixed frame 401, and places the U-shaped component inside the positioning block 406 so that the positioning block 406 initially positions the sides and bottom of the U-shaped component. The second bracket 403 initially positions one end of the U-shaped component. The inclined plate component is placed on the support block 405. After the initial placement is completed, the operator sends a start positioning detection command through the touch screen 7. Positioning and Detection Phase: After receiving the command, the PLC controller 6 triggers the laser positioning sensor 407, infrared sensor 408, and visual positioning camera 409 to operate. The laser positioning sensor 407 detects whether the annular component is accurately fitted onto the positioning post 404. After being powered on, the laser positioning sensor 407 continuously emits a linear laser beam. When the annular component is not fitted or is misfitted, the laser beam will reflect to a non-preset area. When the annular component is accurately fitted onto the positioning post 404, the side wall of the annular component reflects the laser beam. The sensor receives a reflection signal whose intensity and angle both meet the preset thresholds, thereby determining whether the fit is accurate. The infrared sensor 408 detects whether the inclined plate component is in contact with the support block 405. Through diffuse reflection infrared detection, it sends signals to the support block 405. The surface emits infrared light. If the inclined plate component is attached to the support block 405, the reflection distance will change with the thickness of the component. It is compared with the preset standard distance to determine whether it is seamlessly attached. The visual positioning camera 409 captures the position of the U-shaped component and determines whether it matches the positioning block 406. The visual positioning camera 409 collects images of the U-shaped component and the positioning block 406. Through feature extraction and template matching, it determines whether the gap and angle deviation of the two side walls of the component are within the qualified range. If all three types of components are positioned correctly, the sensor feeds the signal back to the PLC controller 6. The PLC controller 6 automatically starts the clamping process. If the positioning of a certain component is not qualified, the touch screen 7 displays the corresponding fault prompt (such as the positioning deviation of the U-shaped component). The operator adjusts the position of the component and re-tests. In the multi-component synchronous clamping stage, the PLC controller 6 synchronously drives each clamping actuator, controls the extension of the second electric push rod 410, and drives the first pressure plate 412 to press down on the annular component. The first pressure sensor 411 collects the clamping force in real time. When the pressure reaches the preset threshold, it feeds back a signal to the PLC controller 6, and the second electric push rod 410 stops moving. At the same time, the PLC controller 6 controls the second servo motor 505 to start, drives the bidirectional lead screw 502 to rotate, and drives the two moving plates 504 to move synchronously in opposite directions along the guide rod 503. Through the connecting frame 413, it pushes the second pressure plate 415 to clamp the inclined plate component. The second pressure sensor 414 collects the clamping force. After the threshold is reached, the second servo motor 505 stops. At the same time, the PLC controller 6 controls the extension of the third electric push rod 416, and drives the third pressure plate 418 to press down on the U-shaped component. The third pressure sensor 417 collects the pressure. After the threshold is reached, the third electric push rod 416 stops, completing the clamping of all components. During the height adjustment stage, if it is necessary to adjust the welding height of the component, a height adjustment command is sent through the touch screen 7. The PLC controller 6 drives the first electric push rod 201 to extend and retract, which drives the fixed plate 202 to rise and fall. At the same time, the connecting plate 206 drives the slider 205 to slide along the slide groove 204 of the fixed plate 203. When the fixed plate 202 reaches the preset height, the first electric push rod 201 stops.

[0034] During the angle adjustment stage, if the welding angle needs to be adjusted, an angle adjustment command is sent through the touch screen 7. The PLC controller 6 drives the first servo motor 312 to start, which drives the worm gear 305 to rotate. The worm gear 305 meshes with the worm wheel 307 to rotate the drive shaft 306. The small gear 308 on the drive shaft 306 meshes with the large gear 309 on the rotating shaft 302, which drives the rotating disk 303 to rotate. At the same time, the support caster 311 at the bottom of the rotating disk 303 rolls along the annular groove 310 of the mounting shell 301. When the rotating disk 303 reaches the preset angle, the first servo motor 312 stops. During the welding operation, after confirming that the components are clamped and the height and angle are adjusted in place, the operator or automated welding equipment will weld the chassis components. During the welding process, the PLC controller 6 receives signals from each pressure sensor in real time. If pressure fluctuations occur, the PLC controller 6 can drive the corresponding actuator to compensate for the pressure and ensure welding stability. During the equipment reset phase, after welding is completed, a reset command is sent via the touch screen 7. The PLC controller 6 drives each component to reset, the second electric push rod 410 and the third electric push rod 416 retract, causing the first pressure plate 412 and the third pressure plate 418 to rise. The second servo motor 505 reverses, causing the second pressure plate 415 to release the inclined plate component. The first electric push rod 201 and the first servo motor 312 drive the fixed plate 202 and the rotating plate 303 back to their initial positions. The operator removes the welded component, completing one work cycle.

[0035] The wiring diagrams for the first electric actuator 201, first servo motor 312, laser positioning sensor 407, infrared sensor 408, visual positioning camera 409, second electric actuator 410, first pressure sensor 411, first pressure plate 412, second pressure sensor 414, third electric actuator 416, third pressure sensor 417, second servo motor 505, touch screen 7, and PLC controller 6 in this invention are common knowledge in the field, and their working principles are well-known technologies. The appropriate model is selected based on actual use. Therefore, the control methods and wiring arrangements for the first electric actuator 201, first servo motor 312, laser positioning sensor 407, infrared sensor 408, visual positioning camera 409, second electric actuator 410, first pressure sensor 411, first pressure plate 412, second pressure sensor 414, third electric actuator 416, third pressure sensor 417, second servo motor 505, touch screen 7, and PLC controller 6 will not be explained in detail.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automotive chassis component welding anti-distortion support fixture, characterized by, Including base (1), the top of base (1) is provided with automatic positioning and pressing mechanism (4), the top of base (1) is installed with PLC controller (6); Automatic positioning and pressing mechanism (4) includes fixed frame (401), first support (402), second support (403), positioning column (404), support block (405), positioning block (406), laser positioning sensor (407), infrared sensor (408), visual positioning camera (409), second electric push rod (410), two connecting frames (413) and third electric push rod (416), laser positioning sensor (407) is used to detect whether annular component is accurately sleeved on positioning column (404), infrared sensor (408) is used to detect whether inclined plate component is accurately placed on support block (405), visual positioning camera (409) is used to shoot the position of U-shaped component, and whether U-shaped component is accurately placed on the inside of positioning block (406) is judged, the telescopic end of second electric push rod (410) is movably penetrated in first support (402) and is fixedly connected with first pressure sensor (411), the bottom of first pressure sensor (411) is fixedly connected with first pressing plate (412) for pressing annular component, two second pressure sensors (414) are fixedly connected on one side of two connecting frames (413), two second pressure sensors (414) are fixedly connected on one side of two second pressure sensors (414), and two second pressing plates (415) for clamping inclined plate component are fixedly connected, the bottom of fixed frame (401) is provided with drive mechanism (5) for driving two second pressing plates (415) to move synchronously and reversely, the telescopic end of third electric push rod (416) is movably penetrated in second support (403) and is fixedly connected with third pressure sensor (417), the bottom of third pressure sensor (417) is fixedly connected with third pressing plate (418) for pressing U-shaped component.

2. A welding distortion prevention support fixture for an automobile chassis component according to claim 1, characterized in that: The top of base (1) is provided with height adjusting mechanism (2), height adjusting mechanism (2) includes first electric push rod (201) fixedly installed on the top of base (1), and the telescopic end of first electric push rod (201) is fixedly connected with fixed disc (202).

3. A welding distortion prevention support fixture for an automobile chassis component according to claim 2, characterized in that: The top of base (1) is fixedly connected with two fixed plates (203), two sliding grooves (204) are formed on one side of two fixed plates (203), two sliding blocks (205) are slidably connected in two sliding grooves (204), the bottom of fixed disc (202) is fixedly connected with two connecting plates (206), and two sliding blocks (205) and two connecting plates (206) are fixedly connected.

4. A welding distortion prevention support fixture for an automobile chassis component according to claim 3, characterized in that: The top of the fixed disc (202) is provided with a welding angle adjusting mechanism (3), the welding angle adjusting mechanism (3) comprises a mounting shell (301) fixedly connected to the top of the fixed disc (202), a rotating shaft (302) and a driving shaft (306) are rotatably connected in the mounting shell (301), the top end of the rotating shaft (302) is movably penetrated through the mounting shell (301) and is fixedly connected with a rotating disc (303), and the fixed frame (401) is fixedly connected to the top of the rotating disc (303).

5. A distortion preventing support fixture for welding of automotive chassis parts as claimed in claim 4 wherein: Two supporting plates (304) are fixedly connected in the mounting shell (301), a worm (305) is rotatably connected between the two supporting plates (304), a worm wheel (307) and a pinion (308) are fixedly sleeved on the outer surface of the driving shaft (306), a large gear (309) is fixedly sleeved on the outer surface of the rotating shaft (302), the worm (305) is in meshing connection with the worm wheel (307), and the pinion (308) is in meshing connection with the large gear (309).

6. A welding distortion control fixture for a chassis component of an automobile as defined in claim 5, wherein: An annular groove (310) is formed in the top of the mounting shell (301), a plurality of supporting universal wheels (311) are mounted on the bottom of the rotating disc (303), a first servo motor (312) is fixedly mounted on one side of one of the supporting plates (304), and the output end of the first servo motor (312) is movably penetrated through the one supporting plate (304) and is fixedly connected with the worm (305).

7. The anti-deformation support fixture for welding of an automobile chassis component according to claim 1, characterized in that: The driving mechanism (5) comprises four mounting plates (501) fixedly connected to the bottom of the fixed frame (401), a bidirectional screw rod (502) is rotatably connected between two of the mounting plates (501), a guide rod (503) is fixedly connected between the other two mounting plates (501), two moving plates (504) are threadedly mounted on the outer surfaces of the bidirectional screw rod (502) and the guide rod (503), two connecting frames (413) are fixedly connected to one side of the two moving plates (504), a second servo motor (505) is fixedly mounted on one side of one of the mounting plates (501), and the output end of the second servo motor (505) is movably penetrated through the one mounting plate (501) and is fixedly connected with the smooth end of the bidirectional screw rod (502).

8. The anti-deformation support fixture for welding of an automobile chassis component according to claim 1, characterized in that: The first support (402) and the second support (403) are fixedly connected to the top of the fixed frame (401), the positioning column (404), the supporting block (405), the positioning block (406), the laser positioning sensor (407) and the infrared sensor (408) are mounted on the top of the fixed frame (401), the second electric push rod (410) is fixedly mounted on the top of the first support (402), and the third electric push rod (416) is fixedly mounted on the top of the second support (403).

9. The anti-deformation support fixture for welding of an automobile chassis component according to claim 1, characterized in that: The top of the first pressing plate (412) is fixedly connected with two movable rods (419), and the top ends of the two movable rods (419) are movably penetrated through the first support (402).

10. The anti-deformation support fixture for welding of an automobile chassis component according to claim 1, characterized in that: The inner side of the second support (403) is provided with a limiting groove (420), the limiting groove (420) is slidably connected with a limiting plate (421), the third pressing plate (418) is fixedly connected with the limiting plate (421), and the top of the base (1) is provided with a touch screen (7).

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