A welding fixture for body-in-white with automatic loading function

Abstract

This application relates to a body-in-white welding fixture with automatic loading function, belonging to the technical field of body-in-white welding fixtures. It includes a mounting base and a flipping clamping mechanism mounted on the mounting base for clamping or releasing workpieces. The flipping clamping mechanism is equipped with a drive mechanism, and the drive mechanism is equipped with a positioning mechanism for positioning the part. The drive mechanism drives the positioning mechanism to precisely load the part, and after the part is loaded to a predetermined position, the drive mechanism can drive the positioning mechanism to release the part. This application effectively solves the problem of low efficiency and accuracy in traditional manual positioning and loading of small parts, and has the effect of improving the efficiency and accuracy of loading small parts.

Description

Technical Field

[0001] This application relates to the field of body-in-white welding fixture technology, and in particular to a body-in-white welding fixture with automatic loading function. Background Technology

[0002] In the automotive manufacturing industry, body-in-white welding is a crucial step, as its process directly impacts the overall quality and performance of the vehicle. With the continuous development of the automotive industry, the requirements for precision and efficiency in the welding process are also increasing. The body-in-white welding process involves the connection and assembly of numerous tiny parts, and the accuracy and efficiency of its operation are vital to ensuring the quality and production efficiency of the body-in-white.

[0003] In the past, the common method for positioning tiny parts during body-in-white welding was manual placement. Workers, relying on their experience and skills, manually placed the tiny parts into predetermined positions on the workpiece, and then used a welding torch to weld them onto the workpiece. This method depended on the worker's skill level and, to a certain extent, ensured accurate positioning and installation of the parts.

[0004] However, the aforementioned method of manually positioning and loading tiny parts has significant drawbacks. To ensure accuracy, workers need to spend considerable time adjusting and confirming during manual positioning, leading to longer loading cycles, reduced production efficiency, and inherent errors in manual operation, making it difficult to guarantee the precision of each positioning and thus affecting the overall quality of the body-in-white. Utility Model Content

[0005] To address the issues of low efficiency and accuracy in traditional manual positioning and loading of small parts, this application provides a white body welding fixture with automatic loading function.

[0006] This application provides a white body welding fixture with automatic loading function, which adopts the following technical solution: A white body welding fixture with automatic loading function includes a mounting base and a flipping clamping mechanism disposed on the mounting base for clamping or releasing workpieces. The flipping clamping mechanism is provided with a driving mechanism and a positioning mechanism for positioning the part. The driving mechanism is used to drive the positioning mechanism to accurately load the part, and the driving mechanism can drive the positioning mechanism to release the part after the part is loaded to a predetermined position.

[0007] By adopting the above technical solution, the mounting base provides the installation foundation for the entire fixture, and the flipping clamping mechanism can clamp or release the workpiece, providing a stable workpiece foundation for subsequent loading operations. At the same time, the flipping clamping mechanism can drive the driving mechanism and the positioning mechanism to approach the workpiece to realize the loading of the part. Among them, the driving mechanism can drive the positioning mechanism to move the part accurately to the loading position before loading, and the positioning mechanism can position the part during the loading process to prevent the part from shifting or falling, thereby improving the stability of the loading process. After the part is loaded to the predetermined position, the driving mechanism can drive the positioning mechanism to release the part, and at the same time, the flipping clamping mechanism can drive the driving mechanism and the positioning mechanism away from the workpiece to pick up and put down the workpiece and load the part again. The fixture as a whole realizes automatic positioning and loading of small parts while clamping the workpiece, avoiding the errors of traditional manual loading, improving the loading efficiency and accuracy of small parts, and solving the problem of low efficiency and accuracy of traditional manual positioning and loading of small parts.

[0008] Preferably, the flipping clamping mechanism includes a mounting plate, a connecting rod, a swing arm, a drive cylinder, a first clamping block, and a second clamping block. The mounting plate is disposed on a mounting base. The connecting rod is rotatably connected to the mounting plate, and the end of the connecting rod away from the mounting plate is fixedly connected to the swing arm. The drive cylinder is rotatably connected to one side of the mounting plate. The end of the swing arm near the drive cylinder is rotatably connected to the piston rod of the drive cylinder. The drive mechanism is disposed at the end of the swing arm away from the drive cylinder. The first clamping block is disposed on the mounting plate, and the second clamping block is disposed on the swing arm. The first clamping block and the second clamping block are respectively located on both sides of the workpiece and form a clamping engagement with the workpiece.

[0009] By adopting the above technical solution, the mounting plate in the flipping clamping mechanism provides a mounting base for each component. The swing arm is driven to rotate by the drive cylinder, which can move the second clamping block closer to the first clamping block to achieve stable clamping of the workpiece. At the same time, it can also move the drive mechanism and the positioning mechanism on the drive mechanism to move closer to the workpiece to achieve precise loading of the part. After the part is loaded to the predetermined position, the drive cylinder drives the swing arm to rotate in the opposite direction, which can move the second clamping block away from the first clamping block to pick up and put away the workpiece. At the same time, it can also move the drive mechanism and the positioning mechanism away from the workpiece to load it again. Among them, the swing arm cooperates with the connecting rod rotatably connected to the mounting plate, so that the movement trajectory of the swing arm can be precisely controlled, avoiding workpiece posture deviation caused by component shaking, and ensuring the stability of the loading process.

[0010] Preferably, the driving mechanism includes a linear cylinder and a driving block. The linear cylinder is located at the end of the swing arm away from the driving cylinder, the driving block is located at the output end of the linear cylinder, and the positioning mechanism is located on the side of the driving block opposite to the linear cylinder.

[0011] By adopting the above technical solution, the linear cylinder in the drive mechanism is located at the end of the swing arm away from the drive cylinder, and the drive block is located at the output end of the linear cylinder, so that the drive block can move linearly under the drive of the linear cylinder, thereby driving the parts on the positioning mechanism to move accurately, so as to accurately place the parts on the workpiece to the predetermined position, thereby improving the loading efficiency and accuracy; after the parts are placed to the predetermined position, the drive block can drive the positioning mechanism to release the parts under the drive of the linear cylinder, so as to load the parts again.

[0012] Preferably, the positioning mechanism includes a fixed block, a first positioning block, a second positioning block, a positioning pin, and a magnetic block. The fixed block is disposed on the side of the drive block away from the linear cylinder. The first positioning block and the second positioning block are respectively disposed on both sides of the fixed block. The first positioning block, the second positioning block, and the fixed block form a positioning space for embedding and positioning the part. The positioning pin is disposed on the fixed block and located within the positioning space, and the positioning pin forms a hanging engagement with the part. The magnetic block is disposed on the fixed block and located below the positioning pin, and the magnetic block forms an adsorption engagement with the part.

[0013] By adopting the above technical solution, the fixed block in the positioning mechanism serves as the mounting base and is located on the side of the drive block away from the linear cylinder. This allows the positioning mechanism to move the part precisely under the drive of the drive block, so as to accurately place the part onto the predetermined position on the workpiece. The first and second positioning blocks in the positioning mechanism are respectively located on both sides of the fixed block and form a positioning space with it. This space can be used to embed and position the part, restricting its movement in the horizontal direction. The positioning pin is located on the fixed block and within the positioning space, and can form a hanging engagement with the part to further fix its position. The magnetic block is located on the fixed block and below the positioning pin, and can form an adsorption engagement with the part to prevent it from falling off. This ensures that the part is stably placed on the positioning mechanism, thereby achieving precise positioning of the part and providing a guarantee for the subsequent precise placement of the part.

[0014] Preferably, a first limiting block is provided on the side of the connecting rod away from the driving cylinder. The first limiting block is fixedly connected to the mounting plate, and a first limiting groove is provided on the first limiting block to form an embedded fit with the swing arm.

[0015] By adopting the above technical solution, the first limiting groove opened on the first limiting block forms an embedded fit with the swing arm, which can limit the swing of the swing arm, avoid the workpiece being over-clamped and damaged, ensure the accuracy and stability of the flipping clamping mechanism, and thus improve the reliability of the welding fixture.

[0016] Preferably, the flipping clamping mechanism further includes a clamping detection component disposed on the mounting plate and a flipping angle control component disposed on the drive cylinder.

[0017] By adopting the above technical solutions, the clamping detection component can detect the clamping status of the workpiece by the flipping clamping mechanism, ensuring the stability and accuracy of workpiece clamping, thereby ensuring the accuracy of the flipping clamping mechanism in driving the drive mechanism and positioning mechanism to load the workpiece; the flipping angle control component can accurately control the angle of the swing arm flipped by the drive cylinder, avoiding excessive flipping amplitude of the swing arm and interference with other components, thereby improving the smoothness of the fixture operation process.

[0018] Preferably, the drive block is provided with an embedding block, the linear cylinder is provided with a second limiting block, and the second limiting block is provided with a second limiting groove that forms an embedding fit with the embedding block.

[0019] By adopting the above technical solution, the embedded block on the drive block and the second limiting block with the second limiting groove on the linear cylinder form an embedded cooperation, which limits the movement of the drive block and improves the accuracy of the drive block movement. This further improves the accuracy of the positioning mechanism in driving the parts onto the workpiece, and solves the problem of low accuracy of traditional manual positioning of small parts.

[0020] Preferably, the drive mechanism further includes an upper part detection component disposed on the linear cylinder.

[0021] By adopting the above technical solution, the part loading inspection component can detect the part loading status, ensure the accuracy and reliability of the loading, avoid the quality problems of the body-in-white caused by loading errors, and further improve the stability of production and product quality.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The combination of flipping clamping mechanism, drive mechanism and positioning mechanism realizes automatic positioning and loading of small parts while clamping the workpiece, avoiding the errors of traditional manual loading, improving the loading efficiency and accuracy of small parts, and solving the problem of low efficiency and accuracy of traditional manual positioning and loading of small parts. 2. The first limiting groove on the first limiting block forms an embedded fit with the swing arm, which can limit the swing of the swing arm and prevent the workpiece from being over-clamped and damaged; the second limiting groove on the second limiting block forms an embedded fit with the embedded block on the drive block, which can limit the movement of the drive block, improve the accuracy of the drive block's movement, and thus further improve the accuracy of the positioning mechanism in driving the part onto the workpiece. 3. The clamping detection component can detect the clamping status of the workpiece by the flipping clamping mechanism, ensuring the stability and accuracy of workpiece clamping. This ensures the accuracy of the flipping clamping mechanism in driving the drive mechanism and positioning mechanism to load the workpiece. The flipping angle control component can precisely control the angle at which the drive cylinder drives the swing arm to flip, avoiding excessive flipping of the swing arm and interference with other components. The loading detection component can detect the loading status of the part, ensuring the accuracy and reliability of loading, and avoiding quality problems of the body-in-white due to loading errors. Attached Figure Description

[0023] Figure 1 This is an isometric schematic diagram that mainly illustrates the connection relationship between the fixture, the workpiece, and the parts in the embodiments of this application; Figure 2 This is an isometric schematic diagram of the main overall structure in the embodiments of this application; Figure 3 This is a partial isometric view of the main structure of the flipping clamping mechanism in the embodiments of this application; Figure 4 This is a partial isometric schematic diagram of the drive mechanism structure, which is the main feature of this application embodiment; Figure 5 This is a partial bottom view of the drive mechanism structure, which is the main feature of this application embodiment; Figure 6 This is a partial isometric schematic diagram of the positioning mechanism structure, which is the main feature of this application embodiment.

[0024] Reference numerals: 1. Mounting base; 11. Reinforcing rib plate; 2. Tilting clamping mechanism; 21. Mounting plate; 22. Connecting rod; 23. Swing arm; 231. First limiting block; 232. Mounting block; 2321. Second limiting block; 24. Drive cylinder; 25. First clamping block; 26. Second clamping block; 27. Clamping detection assembly; 271. Rotating plate; 272. Clamping detection switch; 28. Tilting angle control assembly; 281. Tilting control switch; 282. 1. Fixing rod; 283. Control bolt; 3. Drive mechanism; 31. Linear cylinder; 32. Drive block; 321. Embedding block; 322. First connecting block; 323. Second connecting block; 33. Loading detection assembly; 331. First folding plate; 332. Loading detection switch; 333. Loading detection switch; 334. Second folding plate; 4. Positioning mechanism; 41. Fixing block; 42. First positioning block; 43. Second positioning block; 44. Positioning pin; 45. Magnetic block. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail.

[0026] This application discloses a white body welding fixture with automatic loading function.

[0027] Reference Figure 1 and Figure 2 A white body welding fixture with automatic loading function includes a mounting base 1 and a flipping clamping mechanism 2 detachably fixedly connected to the mounting base 1 for clamping or releasing workpieces. The mounting base 1 is fixedly connected to a reinforcing rib plate 11 by welding. The flipping clamping mechanism 2 is provided with a drive mechanism 3, and the drive mechanism 3 is provided with a positioning mechanism 4 for positioning the part. The drive mechanism 3 is used to drive the positioning mechanism 4 to accurately load the part, and the drive mechanism 3 can drive the positioning mechanism 4 to release the part after the part is loaded to a predetermined position.

[0028] In practical use, the mounting base 1 provides the mounting foundation for the entire fixture. Before loading, the worker manually places the part onto the positioning mechanism 4 for positioning to prevent displacement or falling during loading and improve the stability of the loading process. During loading, the drive mechanism 3 drives the positioning mechanism 4 to move the part precisely to the loading position, preparing for subsequent precise loading. Then, the flipping clamping mechanism 2 flips and clamps the workpiece, while simultaneously driving the drive mechanism 3 and the positioning mechanism 4 closer to the workpiece. When the flipping clamping mechanism 2 stably clamps the workpiece, the part on the positioning mechanism 4 is also precisely loaded to the predetermined position on the workpiece. After the part is placed to the predetermined position, the welding torch presses against the part for welding, and the drive mechanism 3 drives the positioning mechanism 4 to release the part. After the part is released, the flipping clamping mechanism 2 flips and releases the workpiece, while simultaneously driving the drive mechanism 3 and the positioning mechanism 4 away from the workpiece, so as to pick up and put away the workpiece and to place the part again. The various mechanisms in the fixture cooperate with each other to achieve automatic positioning and placement of small parts while clamping the workpiece, avoiding the errors of traditional manual placement, improving the efficiency and accuracy of placing small parts, and solving the problem of low efficiency and accuracy of traditional manual positioning and placement of small parts.

[0029] Reference Figure 2 and Figure 3The flipping clamping mechanism 2 includes a mounting plate 21, a connecting rod 22, a swing arm 23, a drive cylinder 24, a first clamping block 25, and a second clamping block 26. The mounting plate 21 is detachably fixed to the mounting base 1 by bolts. The connecting rod 22 is rotatably connected to the mounting plate 21. In this embodiment, two connecting rods 22 are provided, and the two connecting rods 22 are rotatably connected to both sides of the mounting plate 21 by a rotating shaft. The ends of the two connecting rods 22 away from the mounting plate 21 are located on both sides of the swing arm 23, and the end of any connecting rod 22 away from the mounting plate 21 is fixedly connected to the swing arm 23 by welding. The drive cylinder 24 is hinged to one side of the mounting plate 21. The end of arm 23 near the drive cylinder 24 is hinged to the piston rod of the drive cylinder 24, and the drive mechanism 3 is located at the end of the swing arm 23 away from the drive cylinder 24. The first clamping block 25 is fixedly connected to the mounting plate 21 by bolts, and the second clamping block 26 is fixedly connected to the swing arm 23 by bolts. The first clamping block 25 and the second clamping block 26 are located on both sides of the workpiece and form a clamping engagement with the workpiece. The connecting rod 22 is provided with a first limiting block 231 on the side away from the drive cylinder 24. The first limiting block 231 is fixedly connected to the mounting plate 21 by welding, and the first limiting block 231 is provided with a first limiting groove that forms an embedded engagement with the swing arm 23.

[0030] In practical use, the mounting plate 21 in the flip clamping mechanism 2 provides a mounting base for each component. When the drive mechanism 3 drives the positioning mechanism 4 to move the part precisely to the loading position, the drive cylinder 24 in the flip clamping mechanism 2 drives the swing arm 23 and the connecting rod 22 to rotate, causing the second clamping block 26 to move closer to the first clamping block 25 to achieve stable clamping of the workpiece. At the same time, it drives the drive mechanism 3 and the positioning mechanism 4 to move closer to the workpiece, loading the part to the predetermined position on the workpiece. When the drive mechanism 3 drives the positioning mechanism 4 to release the part, the drive cylinder 24 in the flip clamping mechanism 2 drives the swing arm 23 and the connecting rod 22 to rotate in the opposite direction, causing the second clamping block 26 to move away from the first clamping block 25 to achieve stable clamping of the workpiece. The release of the workpiece facilitates subsequent loading and unloading for re-welding. Simultaneously, it moves the drive mechanism 3 and positioning mechanism 4 away from the workpiece, allowing the worker to place the part again for loading. During the rotation of the swing arm 23 driven by the drive cylinder 24, the connecting rod 22 connected to the mounting plate 21 restricts the movement trajectory of the swing arm 23, preventing workpiece posture deviation due to component shaking and ensuring the stability of the loading process. At the same time, the first limiting groove on the first limiting block 231 forms an embedded fit with the swing arm 23, limiting the swing of the swing arm 23 and preventing the workpiece from being over-clamped and damaged. This ensures the accuracy and stability of the flipping clamping mechanism 2's operation, thereby improving the reliability of the welding fixture.

[0031] Reference Figure 2 , Figure 4 as well as Figure 5 The drive mechanism 3 includes a linear cylinder 31 and a drive block 32. The linear cylinder 31 is located at the end of the swing arm 23 away from the drive cylinder 24. In this embodiment, the end of the swing arm 23 away from the drive cylinder 24 is fixedly connected to the mounting block 232 by bolts, and the linear cylinder 31 is fixedly connected to the mounting block 232 by bolts. The drive block 32 is fixedly connected to the output end of the linear cylinder 31 by bolts, and the positioning mechanism 4 is located on the side of the drive block 32 away from the linear cylinder 31. The side of the drive block 32 away from the linear cylinder 31 is fixedly connected to the embedding block 321 by bolts. A second limiting block 2321 is fixedly connected to the mounting block 232 below the linear cylinder 31 by bolts, and the second limiting block 2321 has a second limiting groove that forms an embedding fit with the embedding block 321.

[0032] In practical use, when the worker stably places the part on the positioning mechanism 4, the linear cylinder 31 in the drive mechanism 3 drives the drive block 32 to move, and drives the positioning mechanism 4 set on the drive block 32 to move synchronously, accurately transporting the part on the positioning mechanism 4 to the loading position, so that the part on the positioning mechanism 4 can be accurately loaded onto the predetermined position on the workpiece after the swing arm 23 rotates, thereby improving the loading efficiency and accuracy. After the part is loaded to the predetermined position, the welding torch presses against the part for welding, and the linear cylinder 31 in the drive mechanism 3 drives the drive block 32 to move in the opposite direction, and drives the positioning mechanism 4 on the drive block 32 to move in the opposite direction, so as to release the part for loading again. During the process of the linear cylinder 31 driving the drive block 32 to move, the second limiting groove opened on the second limiting block 2321 forms an embedded cooperation with the embedding block 321, limiting the movement of the drive block 32, improving the accuracy of the movement of the drive block 32, thereby further improving the accuracy of the positioning mechanism 4 in loading the part.

[0033] Reference Figure 2 , Figure 4 as well as Figure 6The positioning mechanism 4 includes a fixing block 41, a first positioning block 42, a second positioning block 43, a positioning pin 44, and a magnetic block 45. The fixing block 41 is located on the side of the drive block 32 away from the linear cylinder 31. In this embodiment, the side of the drive block 32 away from the linear cylinder 31 is fixedly connected to the first connecting block 322 by bolts. The side of the first connecting block 322 away from the drive block 32 is fixedly connected to the second connecting block 323 by bolts. The fixing block 41 is fixedly connected to the bottom of the second connecting block 323 by bolts. The first positioning block 42 and the second positioning block 43 are respectively fixedly connected to both sides of the fixing block 41 by bolts. The first positioning block 42, the second positioning block 43 and the fixing block 41 form a positioning space for embedding and positioning the part. The positioning pin 44 is threadedly connected to the fixing block 41 and located in the positioning space. One end of the positioning pin 44 forms a hanging engagement with the part. The magnetic block 45 is integrally formed and fixedly connected to the fixing block 41 and located below the positioning pin 44. The magnetic block 45 forms an adsorption engagement with the part.

[0034] In practical use, the first connecting block 322 and the second connecting block 323 provide an installation base for the fixing block 41 in the positioning mechanism 4 and prevent interference between the positioning mechanism 4 and the drive mechanism 3. The fixing block 41 in the positioning mechanism 4 is located on the side of the drive block 32 away from the linear cylinder 31, so that the positioning mechanism 4 can drive the part to move accurately under the drive of the drive block 32, so as to accurately place the part on the predetermined position on the workpiece. Before placing the part, the worker hangs the part on the positioning pin 44 in the positioning mechanism 4 and embeds it in the first positioning block 42 and the second positioning block 43. Within the positioning space formed by the fixing block 41, the displacement of the part during the loading process is restricted. At the same time, the magnetic block 45 below the positioning pin 44 forms an adsorption engagement with the part, which can prevent the part from falling during the loading process and ensure that the part is stably placed on the positioning mechanism 4, thereby achieving accurate positioning of the part and providing a guarantee for the accurate loading of the part in the future. After the workpiece is loaded to the predetermined position, the fixing block 41 moves in the opposite direction under the drive of the linear cylinder 31, so that the part is released from the positioning pin 44 and the magnetic block 45 in the positioning space, so that it can be loaded again in the future.

[0035] Reference Figure 2 and Figure 4The drive mechanism 3 also includes a loading detection component 33 mounted on the linear cylinder 31. In this embodiment, the loading detection component 33 includes a first folding plate 331, a loading detection switch 332, a placing detection switch 333, and a second folding plate 334. The first folding plate 331 is L-shaped. One end of the first folding plate 331 is fixedly connected to the linear cylinder 31 by bolts, and the other end of the first folding plate 331 is located on one side of the linear cylinder 31. The loading detection switch 332 and the placing detection switch 333 are fixedly connected to the side of the first folding plate 331 near the mounting plate 21 by bolts. One end of the second folding plate 334 is fixedly connected to the side of the drive block 32 away from the mounting plate 21 by bolts, and the other end of the second folding plate 334 is located between the loading detection switch 332 and the placing detection switch 333.

[0036] In practical use, the first folding plate 331 in the loading detection assembly 33 provides a mounting base for the loading detection switch 332 and the unloading detection switch 333. When the linear cylinder 31 drives the part on the positioning mechanism 4 to move, the second folding plate 334 moves synchronously between the loading detection switch 332 and the unloading detection switch 333, following the drive block 32. When the second folding plate 334 moves to abut against the loading detection switch 332, it proves that the part has been accurately moved to the loading position. At this time, the flipping clamping mechanism 2 starts to operate, driving the part to be loaded onto the predetermined position on the workpiece. Position; when the second folding plate 334 moves to abut the part release detection switch 333, it proves that the part release is completed. At this time, the flipping clamping mechanism 2 operates in reverse to release the workpiece for reloading; the part release detection switch 332, the part release detection switch 333 and the second folding plate 334 in the part release detection assembly 33 cooperate to accurately detect the part loading and release status, ensure the accuracy and reliability of part loading and release, avoid the quality problems of the body-in-white caused by loading or releasing errors, and further improve the stability of production and product quality.

[0037] Reference Figure 2 and Figure 3The flipping clamping mechanism 2 also includes a clamping detection component 27 disposed on the mounting plate 21 and a flipping angle control component 28 disposed on the drive cylinder 24. In this embodiment, the clamping detection component 27 includes a rotating plate 271 and a clamping detection switch 272. Both the rotating plate 271 and the clamping detection switch 272 are located on the side of the mounting plate 21 away from the drive mechanism 3. The rotating plate 271 is fixedly connected to the connecting rod 22 away from the drive mechanism 3 by bolts, and the clamping detection switch 272 is fixedly connected to the mounting plate 21 on the side away from the drive mechanism 3 by bolts. On plate 21, the rotating plate 271 is arc-shaped at one end near the clamping detection switch 272; the flip angle control assembly 28 includes a flip control switch 281, a fixing rod 282 and a control bolt 283. The flip control switch 281 is fixedly connected to the cylinder body of the drive cylinder 24 by bolts. The fixing rod 282 is fixedly connected to the piston rod of the drive cylinder 24 at one end near the swing arm 23 by bolts. The control bolt 283 is threadedly connected to the fixing rod 282 along the movement direction of the piston rod of the drive cylinder 24.

[0038] In practical use, when the second folding plate 334 moves to abut the loading detection switch 332, the drive cylinder 24 drives the swing arm 23 and the connecting rod 22 to rotate. The rotating plate 271 in the clamping detection assembly 27 will rotate synchronously with the connecting rod 22. When the end of the rotating plate 271 close to the clamping detection switch 272 rotates to abut the clamping detection switch 272, it proves that the flipping clamping mechanism 2 has firmly clamped the workpiece and the part has been accurately loaded to the predetermined position on the workpiece. At this time, the linear cylinder 31 starts to operate, driving the positioning mechanism 4 to release the part for loading again. The rotating plate 271 in the clamping detection assembly 27 cooperates with the clamping detection switch 272 to accurately detect the clamping status of the flipping clamping mechanism 2 on the workpiece, ensuring the stability and accuracy of the workpiece clamping, thereby ensuring the accuracy of the flipping clamping mechanism 2 driving the drive mechanism 3 and the positioning mechanism 4 to load the part. The end of the rotating plate 271 close to the clamping detection switch 272 is arc-shaped, which can avoid interference between the rotating plate 271 and the clamping detection switch 272 when rotating. When the second folding plate 334 moves to the point of contact with the placement detection switch 333, the drive cylinder 24 drives the swing arm 23 and the connecting rod 22 to rotate in the opposite direction. This causes the fixed rod 282 and the control bolt 283 on the fixed rod 282 in the flip angle control assembly 28 to move towards the flip control switch 281 in sync. When the control bolt 283 moves to the point of contact with the flip control switch 281, it indicates that the swing arm 23 has rotated to the preset maximum angle. At this time, the drive cylinder 24 will stop driving the swing arm 23 to continue rotating. The flip control switch 281 in the flip angle control assembly 28, in conjunction with the control bolt 283, can precisely control the maximum angle at which the drive cylinder 24 drives the swing arm 23 to rotate, avoiding excessive rotation of the swing arm 23 and interference with other components, thereby improving the smoothness of the fixture's operation.

[0039] The implementation principle of this application embodiment is as follows: The welding fixture is based on the mounting base 1, and the reinforcing rib plate 11 on the mounting base 1 can enhance the overall stability. The fixture achieves automatic loading of small parts through the coordinated operation of the positioning mechanism 4, the driving mechanism 3, and the flipping clamping mechanism 2, avoiding the errors of traditional manual loading, improving the loading efficiency and accuracy of small parts, and solving the problem of low efficiency and accuracy of traditional manual positioning and loading of small parts. First, the worker embeds the part into the positioning space formed by the first positioning block 42, the second positioning block 43, and the fixing block 41 in the positioning mechanism 4. The first positioning block 42 and the second positioning block 43 jointly limit the part, the positioning pin 44 realizes the hanging of the part, and the magnetic block 45 attracts the part, thereby completing the pre-positioning of the part and preventing the part from shifting or falling off during the subsequent loading process. Subsequently, the linear cylinder 31 of the drive mechanism 3 pushes the drive block 32, causing the positioning mechanism 4 and the part to move precisely to the upper part position. At this time, the second folding plate 334 in the upper part detection assembly 33, which moves with the drive block 32, abuts against the upper part detection switch 332, thereby triggering the action of the flip clamping mechanism 2. The drive cylinder 24 in the flip clamping mechanism 2 drives the swing arm 23 and the connecting rod 22 to rotate. The connecting rod 22 can limit the movement trajectory of the swing arm 23 to avoid the workpiece posture deviation caused by the shaking of the part. Moreover, the first limit block 231 on the mounting plate 21 can counteract the swing arm 23. The swing amplitude of the boom 23 is limited to prevent the workpiece from being over-clamped and damaged. As the boom 23 swings, the second clamping block 26 gradually approaches the first clamping block 25 and clamps the workpiece. At the same time, the drive mechanism 3 and the positioning mechanism 4 approach the workpiece and accurately place the part in the predetermined position of the workpiece. During the rotation of the boom 23 and the connecting rod 22, the rotating plate 271 in the clamping detection assembly 27 also rotates synchronously with the connecting rod 22. When the rotating plate 271 abuts against the clamping detection switch 272, it is confirmed that the workpiece is clamped firmly, and the welding torch presses against the part for welding. After the part is placed to the predetermined position, the linear cylinder 31 pulls the drive block 32 in the opposite direction, causing the positioning mechanism 4 to disengage from the part to release it. At the same time, it pulls the second folding plate 334 to abut against the part placement detection switch 333, triggering the flip clamping mechanism 2 to operate in the reverse direction. The drive cylinder 24 in the flip clamping mechanism 2 pulls the swing arm 23 to reset until the control bolt 283 in the flip angle control component 28 abuts against the flip control switch 281, and the swing arm 23 stops rotating to avoid excessive flipping and interference with other components. Finally, the second clamping block 26 releases the workpiece, and the worker takes away the finished product and places a new workpiece and part, entering the next cycle. The entire process is achieved through the coordinated cooperation and detection control of various mechanisms, realizing the automatic and accurate loading of small parts, solving the problems of low efficiency and poor accuracy of traditional manual loading.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A body-in-white welding fixture having an automatic loading function, characterized by: It includes a mounting base (1) and a flipping clamping mechanism (2) disposed on the mounting base (1) for clamping or releasing workpieces. The flipping clamping mechanism (2) is provided with a driving mechanism (3), and the driving mechanism (3) is provided with a positioning mechanism (4) for positioning the part. The driving mechanism (3) is used to drive the positioning mechanism (4) to move the part onto the workpiece with precision, and the driving mechanism (3) can drive the positioning mechanism (4) to release the part after the part is placed to a predetermined position.

2. The BIW welding fixture with automatic loading function according to claim 1, characterized in that: The flipping clamping mechanism (2) includes a mounting plate (21), a connecting rod (22), a swing arm (23), a drive cylinder (24), a first clamping block (25), and a second clamping block (26). The mounting plate (21) is mounted on the mounting base (1). The connecting rod (22) is rotatably connected to the mounting plate (21), and the end of the connecting rod (22) away from the mounting plate (21) is fixedly connected to the swing arm (23). The drive cylinder (24) is rotatably connected to the mounting plate (21). On one side, the swing arm (23) is rotatably connected to the piston rod of the drive cylinder (24) at one end near the drive cylinder (24), and the drive mechanism (3) is located at the end of the swing arm (23) away from the drive cylinder (24). The first clamping block (25) is located on the mounting plate (21), and the second clamping block (26) is located on the swing arm (23). The first clamping block (25) and the second clamping block (26) are located on both sides of the workpiece and form a clamping engagement with the workpiece.

3. The BIW welding fixture with automatic loading function according to claim 2, characterized in that: The drive mechanism (3) includes a linear cylinder (31) and a drive block (32). The linear cylinder (31) is located at one end of the swing arm (23) away from the drive cylinder (24). The drive block (32) is located at the output end of the linear cylinder (31). The positioning mechanism (4) is located on the side of the drive block (32) away from the linear cylinder (31).

4. The BIW welding fixture with automatic loading function according to claim 3, characterized in that: The positioning mechanism (4) includes a fixed block (41), a first positioning block (42), a second positioning block (43), a positioning pin (44), and a magnetic block (45). The fixed block (41) is located on the side of the drive block (32) away from the linear cylinder (31). The first positioning block (42) and the second positioning block (43) are respectively located on both sides of the fixed block (41). The first positioning block (42), the second positioning block (43), and the fixed block (41) form a positioning space for embedding and positioning the part. The positioning pin (44) is located on the fixed block (41) and within the positioning space. The positioning pin (44) forms a hanging engagement with the part. The magnetic block (45) is located on the fixed block (41) and below the positioning pin (44). The magnetic block (45) forms an adsorption engagement with the part.

5. The BIW welding fixture with automatic loading function according to claim 2, characterized in that: A first limiting block (231) is provided on the side of the connecting rod (22) away from the driving cylinder (24). The first limiting block (231) is fixedly connected to the mounting plate (21), and a first limiting groove is provided on the first limiting block (231) to form an embedded cooperation with the swing arm (23).

6. The BIW welding fixture with automatic loading function according to claim 2, characterized in that: The flipping clamping mechanism (2) also includes a clamping detection component (27) disposed on the mounting plate (21) and a flipping angle control component (28) disposed on the drive cylinder (24).

7. The BIW welding fixture with automatic loading function according to claim 3, characterized in that: The drive block (32) is provided with an embedding block (321), and the linear cylinder (31) is provided with a second limiting block (2321), and the second limiting block (2321) is provided with a second limiting groove that forms an embedding fit with the embedding block (321).

8. The BIW welding fixture with automatic loading function according to claim 3, characterized in that: The drive mechanism (3) also includes an upper part detection component (33) disposed on the linear cylinder (31).

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