Positioning device for the production of a car interior component

Abstract

The application relates to the technical field of welding processing, and particularly discloses a positioning device for automobile interior part production welding, which comprises a base frame, a rotary driving mechanism is fixedly arranged at the middle of the top of the base frame, clamping mechanisms are arranged on the outer side of the rotary driving mechanism in a ring shape at equal intervals, during application of the technical scheme, the clamping mechanisms, the rotary driving mechanism, a transmission mechanism and a protection mechanism are integrally linked to realize integrated workpiece clamping alignment, work station circulation transfer, workpiece lifting and feeding, synchronous protection opening and closing and automatic welding full-process operation during use, so that the operation link of manual intervention in welding processing is reduced, the welding processing flow of the interior part is simplified, operation safety hidden dangers caused by welding scraps are avoided, the use of independent electric control structures is reduced by relying on mechanical linkage, the overall equipment control steps are simplified, and the overall operation flow of the interior part tailor welding processing is optimized.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, and in particular to a positioning device for welding automotive interior parts. Background Technology

[0002] When manufacturing and processing interior parts such as plastic-covered parts and plastic splicing parts for automotive interiors, special positioning devices are required to clamp and fix the workpieces to complete ultrasonic welding and hot melt splicing welding operations. These devices are suitable for welding processing conditions of irregularly shaped interior parts such as door panels, center console trim panels, and seat side trim panels. The welding workstations are mostly open processing workstations. During the operation, the high-temperature welding process will continuously generate high-temperature sparks, debris, and molten plastic slag. Operators need to closely control the positioning fixtures and adjust the angle of the workpieces to complete the welding operation. This type of positioning and clamping device is an essential tooling for the assembly line welding production of automotive interior parts.

[0003] The announcement number "CN222078444U" discloses a positioning fixture for welding automotive interior parts, comprising a worktable, a vertical plate fixedly mounted on the surface of the worktable, a rectangular groove on the front of the vertical plate, and a bidirectional lead screw movably mounted inside the rectangular groove; and two socket blocks, each movably sleeved on the surface of the bidirectional lead screw and placed opposite each other. A first fixing plate and a second fixing plate are fixedly mounted on the front of each socket block, and a cylinder is provided between the first and second fixing plates. A round rod is movably mounted inside the cylinder. This fixture, relying on a bidirectional lead screw linkage clamping structure, is adapted to clamping and positioning irregularly shaped interior parts, which can shorten the workpiece calibration time, ensure the clamping stability of interior parts during the welding process, and avoid welding defects caused by workpiece displacement and deformation.

[0004] The positioning fixture disclosed in this patent adopts an open, exposed structure design. When used in the conventional processing conditions of double-sided welding of interior parts, there is no integrated spark and debris shielding structure. The high-temperature sparks and molten debris generated by the alternating welding of the front and back sides of the interior parts will splash outward irregularly. On the one hand, this directly touches the surrounding workers, which can easily cause burns and clothing burns. At the same time, the debris scattered around the workbench pollutes the workshop environment. On the other hand, the splashed debris will fall into the gaps of the fixture's lead screw, sleeve block and other transmission fits, as well as into the lead screw sliding groove. After the molten plastic debris cools and solidifies, it will jam the transmission structure, increasing the probability of fixture jamming and clamping misalignment failure. Moreover, the solidified debris inside the gaps is difficult to clean manually, which will accelerate the wear of the fixture in the long run. At the same time, the double-sided welding of the workpiece requires manual disassembly, flipping and secondary alignment and clamping, which, combined with the debris interference, significantly reduces the overall processing efficiency of double-sided welding of interior parts. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning device for welding automotive interior parts to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a positioning device for welding automotive interior parts, comprising a base frame, a rotary drive mechanism fixedly installed at the top center of the base frame, clamping mechanisms arranged in a ring at equal intervals on the outer side of the rotary drive mechanism, a transmission mechanism fixedly installed on one side of the base frame, and a protective mechanism provided on the front side of the base frame, the protective mechanism being connected to the rotary drive mechanism via the transmission mechanism. The rotary drive mechanism includes an annular track, which is fixedly installed on the inner side of the base frame. A slip ring is rotatably connected inside the annular track, and a drive assembly is fixedly installed on one side of the annular track. The drive assembly and the slip ring are connected in a transmission manner. The clamping mechanism includes connecting arms, which are arranged in a ring at equal intervals and fixedly installed at the bottom of the slip ring. A fixed base is fixedly installed at the outer end of the connecting arms, and a lifting electric cylinder is fixedly installed at the bottom of the fixed base. A lifting platform is fixedly installed at the top output end of the lifting electric cylinder, and a clamping module is fixedly connected to the top of the lifting platform.

[0007] Furthermore, the drive assembly includes a side housing and a spur gear ring. The side housing is fixedly installed on one side of the annular track. A spur gear is rotatably connected to the inner side of the side housing. A drive motor is fixedly installed at the bottom of the side housing. The output end of the drive motor passes through the side housing and connects to the bottom of the spur gear. The spur gear ring is fixedly connected to the outer side of the slip ring. The spur gear and the spur gear ring are meshed together.

[0008] Furthermore, the clamping module includes a guide rail, which is fixedly connected to the top side of the lifting platform. Both sides of the guide rail are rotatably connected to lead screws with opposite thread directions. A dual-axis motor is fixedly connected between the inner sides of the guide rail. The two output ends of the dual-axis motor are respectively connected to the inner ends of the two lead screws. A slider is threadedly connected to the outer surface of the lead screw. The slider is slidably connected to the inner side of the guide rail. A clamping assembly is fixedly installed on the outer side of the slider.

[0009] Furthermore, the clamping assembly includes a clamping side frame, which is fixedly connected to the outside of the slider. Both ends of the top of the clamping side frame are fixedly connected to clamping electric cylinders. The output end of the clamping electric cylinder passes through the clamping side frame and is fixedly connected to a clamping frame. A conveyor belt is rotatably connected to the inside of the clamping frame. The conveyor belt is used to adjust the movement and alignment of the automotive interior parts clamped inside the clamping side frame, and works with the lead screw and slider to drive them to contact each other to complete the docking and bonding.

[0010] Furthermore, a support plate is fixedly connected to the bottom of the clamping side frame, and ball bearings are rotatably connected to the top of the support plate at equal intervals.

[0011] Furthermore, the protective mechanism includes a welding frame, which is fixedly connected to the front middle of the base frame. A welding module is fixedly installed on the top of the welding frame, and a protective module is provided on the top of the welding frame outside the welding module. The protective module is connected to the transmission mechanism, and one of the clamping modules enters the protective module through the middle of the welding frame.

[0012] Furthermore, the welding module includes a mounting frame, which is fixedly installed inside the welding frame on one side near the circular track. An adjustment motor is fixedly connected to the top of the mounting frame, and a six-axis robot is fixedly installed through the bottom output end of the adjustment motor. A welding head is fixedly installed at the bottom moving end of the six-axis robot.

[0013] Furthermore, the protective module includes a vertical rail, which is fixedly connected to the top two sides of the welding frame. A sliding block is slidably connected inside the vertical rail, and a protective cover is fixedly installed on the inner side of the sliding block. The protective cover is movably disposed on the outside of the welding module. A linkage component is provided on one side of the protective cover, and the linkage component is connected to the transmission mechanism.

[0014] Furthermore, the linkage component includes a support frame, which is fixedly installed on one side of the vertical rail. A rotating shaft is rotatably connected to the outer end of the support frame. A swing plate is fixedly connected to one end of the rotating shaft. A linkage plate is rotatably installed at the lower end of the swing plate. A fixed side arm is rotatably connected to the lower end of the linkage plate. The end of the fixed side arm is fixedly connected to one side of the protective cover. The end of the rotating shaft is connected to the transmission mechanism.

[0015] Furthermore, the transmission mechanism includes a bevel gear ring, an upper synchronous pulley, and a side seat. The bevel gear ring is fixedly installed on the top of the slip ring, the upper synchronous pulley is fixedly installed on the end of the rotating shaft away from the fixed side arm, the side seat is fixedly connected to one side of the base frame, and a lower synchronous pulley is rotatably connected to the inner side of the side seat. The upper synchronous pulley and the lower synchronous pulley are connected by a synchronous belt drive, and a bevel gear is fixedly connected to the inner side of the lower synchronous pulley. The bevel gear and the bevel gear ring are meshed together.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Firstly, in this invention, during the application of this technical solution, the internal components of the clamping mechanism cooperate with each other, enabling the sequential completion of independent clamping of interior workpieces, fine-tuning and alignment of workpiece ends, and automatic splicing and docking of workpieces. The workpiece position is fine-tuned using clamping cylinders, conveyor belts, and ball bearings, and then the two sets of workpieces are joined together using a dual-axis motor, lead screw, and slider linkage. This reduces the need for manual workpiece alignment and the workload associated with manual docking. It is suitable for welding two sets of interior workpieces, using lifting cylinders to adjust the vertical height of the workpieces, autonomously feeding and removing them from the welding area, eliminating the need for manual lifting and adjusting of workpiece height. Combined with multiple sets of circularly arranged clamping modules operating in rotation, workpiece loading, welding, and unloading operations can be carried out simultaneously, reducing the time spent between processes.

[0017] Secondly, in this invention, during the application of this technical solution, by setting up a rotating drive mechanism, a transmission mechanism, and a protective mechanism in a coordinated manner, the protective cover can be synchronously driven to rise and fall by the slip ring station switching power during use. When the station moves into the welding area, the protective cover automatically closes to enclose the welding module; when the station moves out of the welding area, the protective cover automatically opens the welding frame. This effectively prevents high-temperature welding debris from scattering and splashing outwards, avoiding damage to personnel and equipment caused by high-temperature debris. The welding debris is concentrated inside the protective cover and the welding frame, allowing for centralized debris cleaning. The linkage transmission mode eliminates the need for additional power components to control the opening and closing of the protection, reducing the electrical control process of the equipment. At the same time, the overall system can provide automated protection, possessing good protective performance and improving work safety and efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the protective cover in this invention; Figure 5 This is a schematic diagram of the internal structure of the annular track in this invention, viewed from below. Figure 6 This is a schematic diagram of the clamping module and slip ring structure in this invention; Figure 7 This is a schematic diagram of the disassembled structure of the clamping module and clamping components in this invention; Figure 8 This is a schematic diagram of the welding module structure in this invention.

[0019] In the diagram: 1. Base frame; 2. Rotary drive mechanism; 21. Circular track; 22. Slip ring; 23. Drive assembly; 231. Side housing; 232. Spur gear ring; 233. Spur gear; 234. Drive motor; 3. Clamping mechanism; 31. Connecting arm; 32. Fixed base; 33. Lifting cylinder; 34. Lifting platform; 35. Clamping module; 351. Guide rail; 352. Lead screw; 353. Dual-axis motor; 354. Slider; 355. Clamping assembly; 3551. Clamping side frame; 3552. Clamping cylinder; 3553. Clamping frame; 3554. Conveyor belt; 3555. Receiving plate; 3556. Ball bearing; 4. Transmission mechanism; 41. Bevel gear ring; 42. Upper synchronous pulley; 43. Side seat; 44. Lower synchronous pulley; 45. Synchronous belt; 46. Bevel gear; 5. Protective mechanism; 51. Welding frame; 52. Welding module; 521. Mounting bracket; 522. Adjusting motor; 523. Six-axis robot; 524. Welding head; 53. Protective module; 531. Vertical rail; 532. Sliding block; 533. Protective cover; 534. Linkage assembly; 5341. Erection frame; 5342. Rotating shaft; 5343. Swing plate; 5344. Linkage plate; 5345. Fixed side arm. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 8 In this embodiment of the invention, a positioning device for welding automotive interior parts includes a base frame 1, a rotary drive mechanism 2 fixedly installed at the top center of the base frame 1, clamping mechanisms 3 arranged in a ring at equal intervals on the outer side of the rotary drive mechanism 2, a transmission mechanism 4 fixedly installed on one side of the base frame 1, and a protective mechanism 5 provided on the front side of the base frame 1. The protective mechanism 5 is connected to the rotary drive mechanism 2 through the transmission mechanism 4. The rotary drive mechanism 2 includes an annular track 21, which is fixedly installed on the inner side of the base frame 1. A slip ring 22 is rotatably connected inside the annular track 21. A drive group 23 is fixedly installed on one side of the annular track 21, and the drive group 23 and the slip ring 22 are connected in a transmission manner. The clamping mechanism 3 includes connecting arms 31, which are arranged in a ring at equal intervals and fixedly installed at the bottom of the slip ring 22. A fixed base 32 is fixedly installed at the outer end of each connecting arm 31. A lifting cylinder 33 is fixedly installed at the bottom of the fixed base 32. A lifting platform 34 is fixedly installed at the top output end of the lifting cylinder 33. A clamping module 35 is fixedly connected to the top of the lifting platform 34. By setting up a rotary drive mechanism 2, clamping mechanism 3, transmission mechanism 4, and protective mechanism 5 to work together, the rotary drive mechanism 2 can be used to control the flow of the workstation. The drive group 23 drives the slip ring 22 to rotate along the inside of the ring track 21, which can drive the multiple ring-arranged clamping mechanisms 3 to synchronously rotate and change positions. Together with the connecting arms 31 and fixed base 32, the clamping mechanism 3 can be moved as a whole. The lifting cylinder 33 controls the vertical start and stop of the lifting platform 34, allowing for autonomous control of the clamping process. The vertical working height of the workpiece is adapted to the welding operation height requirements. At the same time, the rotating drive mechanism 2 can be linked with the protective mechanism 5 through the transmission mechanism 4 during operation, so that the workstation switching operation and the protective opening and closing operation can be carried out simultaneously. The protective mechanism 5 can block the high-temperature sparks and molten debris generated by welding in real time, preventing debris from splashing and touching the on-site workers. It can also prevent debris from falling and adhering to the surface of the rotating parts of the rotating drive mechanism 2, reducing the situation where debris accumulation hinders the operation of the parts. Multiple clamping mechanisms 3 are arranged in a ring for turnover operation, which can simultaneously carry out workpiece loading, workpiece welding and workpiece unloading operations, reducing the waiting interval between processes. The integrated linkage structure reduces the number of independent electrical control components used, reducing the difficulty of equipment operation. The entire process is completed by linkage transmission, without the need for manual adjustment of the protective structure and workstation structure, reducing the number of manual intervention operation steps.

[0022] Please see Figures 1-6The drive assembly 23 includes a side housing 231 and a spur gear ring 232. The side housing 231 is fixedly installed on one side of the annular track 21. A spur gear 233 is rotatably connected to the inner side of the side housing 231. A drive motor 234 is fixedly installed at the bottom of the side housing 231. The output end of the drive motor 234 passes through the side housing 231 and connects to the bottom of the spur gear 233. The spur gear ring 232 is fixedly connected to the outer side of the slip ring 22. The spur gear 233 and the spur gear ring 232 are meshed together. By setting the side housing 231, the spur gear ring 232, the spur gear 233, and the drive motor 234 to form a complete drive assembly 23, the drive motor 234 can directly drive the spur gear 233 to rotate continuously during use. The spur gear 233 and the spur gear ring 232 remain in a meshed state, which can drive the spur gear 233 to rotate continuously. Force is transmitted to slip ring 22, which drives slip ring 22 to complete the rotation inside the annular track 21. The side housing 231 can form a barrier to shield the meshing area of ​​spur gear 233, preventing welding debris from falling into the meshing gap between spur gear 233 and spur gear ring 232, thus avoiding debris accumulation and getting stuck in the gear meshing position. The drive motor 234 directly connects to the spur gear 233, eliminating unnecessary intermediate transmission components. There is no power loss during the power transmission process. The rotation speed of slip ring 22 can be directly controlled by the start / stop and speed adjustment of drive motor 234, which can freely adjust the switching speed of each clamping mechanism 3. The entire transmission structure relies on gear meshing to complete power transmission, eliminating the need for manual rotation of slip ring 22 to adjust the position, thus reducing manual operation steps.

[0023] Please see Figures 4-7The clamping module 35 includes a guide rail 351, which is fixedly connected to the top side of the lifting platform 34. Two lead screws 352 are rotatably connected to both sides of the guide rail 351, with opposite thread directions. A dual-axis motor 353 is fixedly connected between the inner sides of the guide rail 351, with its two output ends connected to the inner ends of the two lead screws 352 respectively. A slider 354 is threaded onto the outer surface of the lead screws 352, and slidably connected to the inner side of the guide rail 351. A clamping assembly 355 is fixedly installed on the outer side of the slider 354. By configuring the guide rail 351, lead screws 352, dual-axis motor 353, slider 354, and clamping assembly 355 to form the clamping module 35, the dual-axis motor 353 can synchronously output power to drive the lead screws 352 on both sides of the guide rail 351 to rotate synchronously, with the two sets of lead screws 352 having opposite thread directions. Conversely, the corresponding slider 354 can slide towards or away from each other along the guide rail 351. The slider 354 can synchronously drive the outer clamping component 355 to move synchronously, which can change the distance between the two sets of clamping components 355. It can adapt to the clamping and placement of interior workpieces of different sizes. The dual-axis motor 353 is integrated with the two sets of lead screws 352 to ensure that the sliding stroke of the sliders 354 on both sides is consistent, so that the displacement distance of the clamping components 355 on both sides is equal. This makes it easy to control the docking distance of the two sets of interior workpieces to be welded. The guide rail 351 can limit the sliding trajectory of the slider 354 to avoid the slider 354 from deviating and shaking during the sliding process. It can smoothly drive the clamping component 355 to move and fit the workpiece. The whole process is driven by electricity to complete the clamping distance adjustment and workpiece docking. There is no need to manually move the clamping component 355 to adjust the position, which reduces the workload of manually adjusting the clamping distance.

[0024] Please see Figures 4-7The clamping assembly 355 includes a clamping side frame 3551, which is fixedly connected to the outside of the slider 354. Clamping electric cylinders 3552 are fixedly connected to both ends of the top of the clamping side frame 3551. A clamping frame 3553 is fixedly connected to the output end of the clamping electric cylinder 3552 through the clamping side frame 3551. A conveyor belt 3554 is rotatably connected to the inner side of the clamping frame 3553. By configuring the clamping side frame 3551, clamping electric cylinders 3552, clamping frame 3553, and conveyor belt 3554 to form the clamping assembly 355, the clamping side frame 3551 can form a limiting space to accommodate automotive interior parts during use, thus limiting the lateral placement of the parts and clamping them effectively. The vertical output power of the electric cylinder 3552 can drive the clamping frame 3553 to move vertically, which can change the vertical distance between the clamping frame 3553 and the bottom of the clamping side frame 3551, thereby completing the vertical clamping and releasing operation of the interior workpiece. The conveyor belt 3554 inside the clamping frame 3553 can rotate autonomously, which can drive the clamped interior workpiece to move slightly, which is convenient for fine-tuning the position of the workpiece splicing port and facilitating the workpiece docking and calibration operation. The two sets of clamping electric cylinders 3552 work together synchronously to clamp the workpiece, which can apply clamping force evenly and avoid the workpiece being shifted on one side. The clamping and fine-tuning of the workpiece are completed by the electronic control structure, eliminating the need for manual pressing to fix the workpiece and reducing the manual operation of material positioning.

[0025] Please see Figures 4-7 A receiving plate 3555 is fixedly connected to the bottom of the clamping side frame 3551. Ball bearings 3556 are rotatably connected to the top of the receiving plate 3555 at equal intervals. By providing the receiving plate 3555 and ball bearings 3556 at the bottom of the inner side of the clamping side frame 3551, the receiving plate 3555 can support the automotive interior parts placed inside the clamping side frame 3551 during use. This distributes the vertical pressure borne by the clamping frame 3553 when clamping the workpiece, preventing the entire weight of the workpiece from being applied to the clamping frame 3553. The top of the receiving plate 3555 can move freely. The rotating ball bearing 3556 reduces the frictional resistance between the bottom surface of the workpiece and the receiving plate 3555, making the workpiece movement easier when the conveyor belt 3554 drives the workpiece to fine-tune its position. It can flexibly adjust the position of the workpiece splicing port in conjunction with the conveyor belt 3554. The ball bearing 3556 rolls in close contact with the bottom surface of the workpiece, which can also prevent the bottom surface of the workpiece from directly rubbing against the receiving plate 3555 and causing scratches, thus protecting the integrity of the appearance of the interior workpiece. At the same time, the ball bearing 3556 can rotate autonomously to adapt to small displacements of the workpiece in multiple directions, improving the convenience of workpiece alignment adjustment.

[0026] Please see Figures 1-5The protective mechanism 5 includes a welding frame 51, which is fixedly connected to the front middle of the base frame 1. A welding module 52 is fixedly installed on the top of the welding frame 51. A protective module 53 is located on the outside of the welding module 52 on the top of the welding frame 51. The protective module 53 is connected to the transmission mechanism 4. The protective mechanism 5 is formed by the combination of the welding frame 51, the welding module 52, and the protective module 53. In use, the welding frame 51 can fix the working position of the welding module 52, which can define a fixed welding work area and facilitate the fixed-point welding processing after the interior workpiece is transferred. The protective module 53 relies on the transmission mechanism. The linkage mechanism 4 operates in tandem, starting and stopping synchronously with the workstation switching action. After the workpiece enters the welding area, it forms a barrier around the welding module 52, intercepting high-temperature sparks and molten debris generated during welding operations and preventing debris from scattering outwards. The protective module 53 opens and closes in tandem with the transmission mechanism 4, without the need for separate operation. It can open the space synchronously with the workpiece moving out of the welding area, facilitating personnel to clean and adjust the welding module 52. The welding frame 51 is positioned and installed based on the base frame 1, stably bearing the operating load of the welding module 52 and the protective module 53, reducing structural shaking during welding operations.

[0027] Please see Figures 1-5 and Figure 8 The welding module 52 includes a mounting frame 521, which is fixedly installed inside the welding frame 51 near the annular track 21. An adjusting motor 522 is fixedly connected to the top of the mounting frame 521. A six-axis robot 523 is fixedly installed through the bottom output end of the adjusting motor 522, and a welding head 524 is fixedly installed at the bottom moving end of the six-axis robot 523. During application, the welding module 52, consisting of the mounting frame 521, adjusting motor 522, six-axis robot 523, and welding head 524, allows the mounting frame 521 to fix the adjusting motor 522 entirely inside the welding frame 51 during use. At a designated location, it can stably bear the welding load of the robotic arm. Adjusting the output power of motor 522 can drive the six-axis robotic arm 523 to adjust the overall working angle, which can adapt to the welding points of interior workpieces with different placement angles and splicing positions. The six-axis robotic arm 523 can drive the bottom welding head 524 to move flexibly from multiple angles, and can fit into the splicing gaps of the workpiece to complete the all-round welding operation. The welding head 524 completes the welding operation autonomously based on the electronic control structure, without the need for manual hand-held welding equipment to be close to the workpiece for processing, reducing the time that personnel are in close contact with the high-temperature welding area. When working in conjunction with the outer protection module 53, it further avoids the safety risks brought about by the welding operation.

[0028] Please see Figures 1-5 and Figure 8The protective module 53 includes a vertical rail 531, which is fixedly connected to the top two sides of the welding frame 51. A sliding block 532 is slidably connected inside the vertical rail 531. A protective cover 533 is fixedly installed inside the sliding block 532. The protective cover 533 is movably positioned outside the welding module 52. A linkage component 534 is provided on one side of the protective cover 533. The linkage component 534 is connected to the transmission mechanism 4. During application, the protective module 53, consisting of the vertical rail 531, sliding block 532, protective cover 533, and linkage component 534, restricts the sliding path of the sliding block 532, allowing for smooth control of the vertical lifting stroke of the protective cover 533. The linkage component 534 receives the power transmitted by the transmission mechanism 4. The force can drive the sliding block 532 to slide along the inner side of the vertical rail 531, thereby driving the protective cover 533 to move up and down synchronously. After the protective cover 533 moves down, it can surround and wrap the entire outer side of the welding module 52, which can completely block the high-temperature debris and sparks from welding, prevent debris from spilling out and injuring on-site operators, and also prevent debris from falling into various transmission meshing parts of the device. After the protective cover 533 moves up, it can completely open the outer space of the welding module 52, and can directly clean the welding slag and debris accumulated on the inner wall of the protective cover 533 and the surface of the welding module 52. The linkage component 534 obtains power synchronously through the transmission mechanism 4, and can synchronously control the opening and closing of the protective cover 533 according to the position switching of the slip ring 22, without the need for separate electrical control of the protective cover 533 to start and stop, reducing additional control procedures.

[0029] Please see Figures 1-5The linkage component 534 includes a mounting frame 5341, which is fixedly installed on one side of the vertical rail 531. A rotating shaft 5342 is rotatably connected to the outer end of the mounting frame 5341. A swing plate 5343 is eccentrically fixedly connected to one end of the rotating shaft 5342. The swing plate 5343 and the axis of the rotating shaft 5342 form a preset eccentric distance, constituting a crank structure. When the swing plate 5343 rotates eccentrically with the rotating shaft 5342, the linkage plate 5344 rotatably installed at its lower end acts as a connecting rod. The fixed side arm 5345, which is rotatably connected at its lower end, pushes the sliding block 532 to perform linear reciprocating lifting and lowering motion under the constraint of the vertical rail 531. The end of the fixed side arm 5345 is fixedly connected to one side of the protective cover 533, and the end of the rotating shaft 5342 is connected to the transmission mechanism 4. By setting up the support frame 5341, rotating shaft 5342, swing plate 5343, linkage plate 5344, and fixed side arm 5345 to form a linkage assembly 534, the support frame 534 can be used in this way. 1. The rotating shaft 5342 can be supported to maintain a stable rotational position. The transmission mechanism 4 outputs power to drive the rotating shaft 5342 to rotate continuously. The rotating shaft 5342 synchronously drives the swing plate 5343 to complete the reciprocating deflection action. The swing plate 5343 pushes and pulls the linkage plate 5344 to generate vertical displacement. The linkage plate 5344 then pulls the protective cover 533 to lift synchronously through the fixed side arm 5345. The entire multi-link structure can convert the rotational motion of the rotating shaft 5342 into the linear lifting motion of the protective cover 533. It can synchronously transmit the power of workstation switching by relying on the transmission mechanism 4, without the need for an additional motor to drive the protective cover 533 separately. The rotating shaft 5342, the swing plate 5343, and the linkage plate 5344 adopt a rotating connection cooperation form. There will be no movement jamming during the operation of each component. The entire power transmission path relies on the direct connection of mechanical components, reducing the additional operation steps brought by intermediate conversion components. The workstation switching action and the lifting action of the protective cover 533 can be executed synchronously.

[0030] Please see Figures 1-5The transmission mechanism 4 includes a bevel gear ring 41, an upper synchronous pulley 42, and a side seat 43. The bevel gear ring 41 is fixedly installed on the top of the slip ring 22. The upper synchronous pulley 42 is fixedly installed on the end of the rotating shaft 5342 away from the fixed side arm 5345. The side seat 43 is fixedly connected to one side of the base frame 1. A lower synchronous pulley 44 is rotatably connected to the inner side of the side seat 43. The upper synchronous pulley 42 and the lower synchronous pulley 44 are connected by a synchronous belt 45. A bevel gear 46 is fixedly connected to the inner side of the lower synchronous pulley 44. The bevel gear 46 meshes with the bevel gear ring 41. By setting the bevel gear ring 41, upper synchronous pulley 42, side seat 43, lower synchronous pulley 44, synchronous belt 45, and bevel gear 46 to form the transmission mechanism 4, the operation of the slip ring 22 will drive the top bevel gear ring 41 to rotate synchronously. The bevel gear ring 41 drives the bevel gear 46 to rotate by relying on the meshing state. The bevel gear 46 and the lower synchronous pulley 44 remain coaxial. The lower synchronous pulley 44 drives the upper synchronous pulley 42 to rotate synchronously with the synchronous belt 45. The upper synchronous pulley 42 transmits power to the rotating shaft 5342 to drive the linkage component 534. The entire structure can convert the circumferential rotational power of the slip ring 22 into the rotational power of the rotating shaft 5342, so that the workstation switching action and the lifting action of the protective cover 533 can be carried out synchronously. The side seat 43 can limit the rotation position of the lower synchronous pulley 44 to prevent the synchronous belt 45 from slipping and deviating during operation. The meshing form of the bevel gear 46 and the bevel gear ring 41 can change the direction of power transmission. There is no need to add an independent power source to drive the protective module 53. The opening and closing of the protective structure can be completed by relying on the original power of the rotary drive mechanism 2, reducing the number of additional electrical control components. The overall mechanical transmission can transmit power synchronously, eliminating the need for manual operation of the protective cover 533 and improving its ease of use.

[0031] The working principle of this invention is as follows: During application, the operator places two sets of automotive interior parts to be welded and spliced ​​into the side clamping frames 3551 on both sides. The receiving plate 3555 supports the overall weight of the interior parts, and the ball bearings 3556 on the top of the receiving plate 3555 reduce the resistance to movement of the parts. Then, the clamping cylinder 3552 is activated to push the clamping frame 3553 vertically downward. The clamping frame 3553, in conjunction with the receiving plate 3555, vertically clamps the two sets of interior parts, completing the independent clamping and fixing of the two sets of workpieces. After clamping is completed, the inner conveyor belt 3554 of the clamping frame 3553 is activated. The conveyor belt 3554, in conjunction with the ball bearings 3556, drives a single set of interior trim components to move slightly horizontally. The operator adjusts the position of the splicing ports of the two sets of workpieces based on the transmission displacement until the splicing ports of the two sets of workpieces are completely aligned. After the ports are aligned, the dual-axis motor 353 is started. The dual-axis motor 353 drives the two sets of lead screws 352 with opposite rotation directions inside the guide rail 351 to rotate. The lead screws 352 drive the sliders 354 to slide towards each other. The sliders 354 drive the clamping components 355 on both sides to move synchronously, thereby driving the two sets of aligned interior trim components to move closer together and fit together, completing the splicing and docking of the two sets of interior trim components.

[0032] After the interior parts are assembled and connected, the drive unit 23 can be started to carry out the workstation rotation operation. The drive motor 234 of the drive unit 23 drives the spur gear 233 to rotate. The spur gear 233 drives the spur ring 232 to rotate, which can drive the slip ring 22 to rotate along the inside of the annular track 21. The slip ring 22 drives the multiple sets of connecting arms 31 at the bottom to move synchronously in annular displacement. The connecting arms 31 drive the overall clamping mechanism 3 to rotate synchronously. In this way, the workstations of the various sets of clamping modules 35 arranged in annularly rotate. The device has multiple sets of clamping modules 35 working in turn. One set of clamping modules 35 cooperates with the welding frame 5. 1. After the welding operation is completed, the remaining clamping modules 35 simultaneously complete the workpiece loading and finished product unloading operations. After the workpiece welding is completed, the lifting electric cylinder 33 is activated in advance to retract and drive the lifting platform 34 to move down, pulling the processed workpiece down away from the welding operation area, so that the clamping module 35 can rotate and transfer with the slip ring 22. When the clamping module 35 carrying the newly docked workpiece rotates to the bottom position of the welding frame 51, the lifting electric cylinder 33 is activated again to push the lifting platform 34 up, pushing the interior parts to be welded to the working position of the welding head 524 at the bottom of the six-axis robot 523.

[0033] During the entire process of the slip ring 22 rotating in annularly to switch the clamping module 35, the slip ring 22 synchronously drives the bevel gear ring 41 to rotate synchronously. The bevel gear ring 41 meshes with and drives the bevel gear 46 to rotate. The bevel gear 46 drives the lower synchronous wheel 44 to rotate coaxially. The lower synchronous wheel 44 drives the upper synchronous wheel 42 to rotate synchronously through the synchronous belt 45. The upper synchronous wheel 42 drives the rotating shaft 5342 to rotate inside the erecting frame 5341. The rotating shaft 5342 drives the swing plate 5343 to reciprocate. The swing plate 5343 reciprocates by pushing and pulling the linkage plate 5344. The linkage plate 5344 pulls the fixed side arm 5345 to move, thereby driving the sliding block 532 to slide along the inside of the vertical rail 531. This controls the automatic lifting and lowering of the protective cover 533. By setting the transmission ratio between the bevel gear ring 41 and the bevel gear 46, and between the upper synchronous wheel 42 and the lower synchronous wheel 44, the system can achieve the desired automatic lifting and lowering. During the rotation of the slip ring 22 during the workstation switching process, it simultaneously drives the protective cover 533 to move downward through the transmission mechanism 4. When the slip ring 22 rotates to the position and stops, the protective cover 533 moves down to the closed state, completing the coverage of the outside of the welding module 52. Subsequently, the lifting cylinder 33 is activated, pushing the lifting platform 34 to move the clamped object upward into the closed protective cover for welding operations. This avoids mechanical interference in space and timing between the upward movement of the object and the downward movement of the cover, and closes the welding operation space. When the clamping module 35 moves the object downward away from the welding position, the protective cover 533 moves upward simultaneously to open the welding frame 51 area. After the protective cover 533 is raised, the welding head 524 and the six-axis robot 523 can be directly cleaned of welding slag, or equipment maintenance and control operations can be carried out.

[0034] After the workpiece to be welded is pushed into place and the protective cover 533 completely encloses the welding area, the adjusting motor 522 drives the six-axis robot 523 to adjust the working position. The six-axis robot 523 drives the welding head 524 to fit the workpiece splicing position to complete the welding operation. After the welding of a single workpiece is completed, the lifting cylinder 33 retracts and lowers the workpiece. The protective cover 533 opens synchronously with the workstation rotation, and the finished workpiece rotates out of the welding area with the clamping module 35. After the new workpiece to be welded is transferred into place, the entire operation process is repeated. This device relies on the transmission mechanism 4 to realize the synchronous linkage between the rotation of the workstation and the opening and closing of the protective cover 533. Throughout the welding operation, the protective cover 533 surrounds and shields the welding point. All the high-temperature sparks and molten plastic debris generated during welding are retained in the inner space of the protective cover 533 and will not splash randomly in all directions. On the one hand, it can isolate the high-temperature debris from contacting the on-site workers and prevent burns caused by high-temperature debris. On the other hand, it can prevent debris from falling into the gaps between the components inside the equipment. To prevent wear and jamming of transmission components after high-temperature debris cools and solidifies, thus reducing the probability of equipment component damage, all welding debris only accumulates on the inner wall of the protective cover 533 and inside the welding frame 51. After the clamping module 35 moves the workpiece down and out of the welding area, the protective cover 533 is simultaneously raised to open the working space. Operators can directly clean the debris accumulated on the inner wall of the protective cover 533 and inside the welding frame 51 at fixed points, making the cleaning operation concentrated and convenient. At the same time, the device adopts the operation process of first clamping the workpiece, then fine-tuning the workpiece splicing and alignment, and finally driving the workpiece docking. It is suitable for the alignment and processing of two sets of interior splicing workpieces, reducing the manual operation of moving the workpiece to adjust the docking. Multiple clamping modules 35 rotate in a ring, which can simultaneously and in parallel complete the three processes of workpiece loading, workpiece welding, and workpiece unloading, reducing the waiting time of the process. With the help of the lifting electric cylinder 33, the workpiece lifting, feeding and unloading are completed autonomously, without the need for manual adjustment of the workpiece welding height, simplifying the overall welding processing operation process.

Claims

1. A positioning device for welding automotive interior parts, characterized in that, Includes a base frame (1), a rotary drive mechanism (2) is fixedly installed at the top center of the base frame (1), clamping mechanisms (3) are installed in a ring at equal intervals on the outer side of the rotary drive mechanism (2), a transmission mechanism (4) is fixedly installed on one side of the base frame (1), and a protective mechanism (5) is provided on the front side of the base frame (1). The protective mechanism (5) is connected to the rotary drive mechanism (2) through the transmission mechanism (4). The rotary drive mechanism (2) includes an annular track (21), which is fixedly installed on the inner side of the base frame (1). A slip ring (22) is rotatably connected inside the annular track (21). A drive group (23) is fixedly installed on one side of the annular track (21), and the drive group (23) and the slip ring (22) are connected in a transmission manner. The clamping mechanism (3) includes connecting arms (31), which are arranged in a ring at equal intervals and fixedly installed at the bottom of the slip ring (22). A fixed seat (32) is fixedly installed at the outer end of the connecting arm (31), and a lifting electric cylinder (33) is fixedly installed at the bottom of the fixed seat (32). A lifting platform (34) is fixedly installed at the top output end of the lifting electric cylinder (33), and a clamping module (35) is fixedly connected to the top of the lifting platform (34).

2. The positioning device for welding automotive interior parts according to claim 1, characterized in that, The drive assembly (23) includes a side housing (231) and a spur gear ring (232). The side housing (231) is fixedly installed on one side of the ring track (21). A spur gear (233) is rotatably connected to the inner side of the side housing (231). A drive motor (234) is fixedly installed at the bottom of the side housing (231). The output end of the drive motor (234) passes through the side housing (231) and connects to the bottom of the spur gear (233). The spur gear ring (232) is fixedly connected to the outer side of the slip ring (22). The spur gear (233) and the spur gear ring (232) are meshed together.

3. The positioning device for welding automotive interior parts according to claim 2, characterized in that, The clamping module (35) includes a guide rail (351), which is fixedly connected to the top side of the lifting platform (34). Both sides of the guide rail (351) are rotatably connected to lead screws (352), and the threads of the two lead screws (352) are opposite to each other. A dual-axis motor (353) is fixedly connected between the inner sides of the guide rail (351). The two output ends of the dual-axis motor (353) are respectively connected to the inner ends of the two lead screws (352). A slider (354) is threadedly connected to the outer surface of the lead screw (352). The slider (354) is slidably connected to the inner side of the guide rail (351). A clamping assembly (355) is fixedly installed on the outer side of the slider (354).

4. The positioning device for welding automotive interior parts according to claim 3, characterized in that, The clamping assembly (355) includes a clamping side frame (3551), which is fixedly connected to the outside of the slider (354). Both ends of the top of the clamping side frame (3551) are fixedly connected to clamping electric cylinders (3552). The output end of the clamping electric cylinder (3552) passes through the clamping side frame (3551) and is fixedly connected to a clamping frame (3553). The inner side of the clamping frame (3553) is rotatably connected to a conveyor belt (3554).

5. A positioning device for welding automotive interior parts according to claim 4, characterized in that, The bottom of the clamping side frame (3551) is fixedly connected to a support plate (3555), and the top of the support plate (3555) is rotatably connected with balls (3556) at equal intervals.

6. A positioning device for welding automotive interior parts according to claim 1, characterized in that, The protective mechanism (5) includes a welding frame (51), which is fixedly connected to the front middle of the base frame (1). A welding module (52) is fixedly installed on the top of the welding frame (51). A protective module (53) is provided on the outside of the welding module (52) at the top of the welding frame (51). The protective module (53) is connected to the transmission mechanism (4).

7. A positioning device for welding automotive interior parts according to claim 6, characterized in that, The welding module (52) includes a mounting frame (521), which is fixedly installed inside the welding frame (51) on one side near the annular track (21). An adjustment motor (522) is fixedly connected to the top of the mounting frame (521), and a six-axis robot (523) is fixedly installed through the mounting frame (521) at the bottom output end of the adjustment motor (522). A welding head (524) is fixedly installed at the bottom moving end of the six-axis robot (523).

8. A positioning device for welding automotive interior parts according to claim 7, characterized in that, The protective module (53) includes a vertical rail (531), which is fixedly connected to the top two sides of the welding frame (51). A sliding block (532) is slidably connected inside the vertical rail (531). A protective cover (533) is fixedly installed on the inner side of the sliding block (532). The protective cover (533) is movably disposed on the outside of the welding module (52). A linkage component (534) is provided on one side of the protective cover (533). The linkage component (534) and the transmission mechanism (4) are connected in a transmission manner.

9. A positioning device for welding automotive interior parts according to claim 8, characterized in that, The linkage component (534) includes a support frame (5341), which is fixedly installed on one side of the vertical rail (531). The outer end of the support frame (5341) is rotatably connected to a rotating shaft (5342). One end of the rotating shaft (5342) is fixedly connected to a swing plate (5343). The lower end of the swing plate (5343) is rotatably installed with a linkage plate (5344). The lower end of the linkage plate (5344) is rotatably connected to a fixed side arm (5345). The end of the fixed side arm (5345) is fixedly connected to one side of the protective cover (533). The end of the rotating shaft (5342) is connected to the transmission mechanism (4).

10. A positioning device for welding automotive interior parts according to claim 9, characterized in that, The transmission mechanism (4) includes a bevel gear ring (41), an upper synchronous pulley (42), and a side seat (43). The bevel gear ring (41) is fixedly installed on the top of the slip ring (22). The upper synchronous pulley (42) is fixedly installed on the end of the rotating shaft (5342) away from the fixed side arm (5345). The side seat (43) is fixedly connected to one side of the base frame (1). The inner side of the side seat (43) is rotatably connected to a lower synchronous pulley (44). The upper synchronous pulley (42) and the lower synchronous pulley (44) are connected by a synchronous belt (45). The inner side of the lower synchronous pulley (44) is fixedly connected to a bevel gear (46). The bevel gear (46) and the bevel gear ring (41) are meshed together.

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