Welding device for automotive upholstery

Abstract

The invention discloses a welding device for automotive upholstery, which comprises a welding platform, a welding manipulator for welding is mounted on one side of the welding platform, a fixing mechanism is mounted at the top of the welding platform in a penetrating manner, and when the automotive upholstery is welded, the fixing mechanism can fix the automotive upholstery; through the arrangement of the self-adaptive pressing unit, a plurality of first piston cylinders are installed at the bottom of the installation shell in a penetrating mode, a first piston plate and a first piston rod are arranged in each first piston cylinder, and the first piston plates can move under the action of piston springs; each first piston rod can automatically stretch out and draw back according to the shape and the surface fluctuation of the interior trim part, and meanwhile, hydraulic oil filled in the mounting shell communicates with the first piston barrels through connecting pipes, so that the hydraulic oil can freely flow among the first piston barrels.

Description

Technical Field

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

[0002] Automotive interiors mainly refer to automotive products used in the modification of the car's interior, involving all aspects of the car's interior. Automotive interior parts include various items such as the dashboard, door panels, floor mats, seats, and steering wheel. Currently, clamping and fixing devices are required when welding automotive interior parts to ensure the stability of the welding process. In existing automotive interior parts welding, the process involves first assembling the automotive interior parts and placing them on a mounting plate, then opening a hydraulic cylinder. The hydraulic cylinder then lowers a pressure plate and presses the automotive interior parts firmly.

[0003] However, existing technologies still have significant shortcomings, such as: In the existing technology: during the welding process of automotive interior parts, automotive interior parts usually have complex three-dimensional curved surfaces, while traditional pressure plates are mostly rigid structures, which can easily lead to uneven pressure on the welding surface, resulting in defects such as incomplete welding and poor appearance. Furthermore, some existing improvement solutions use simple elastic pads or discrete spring columns, which have some improvement, but have two major problems: First, each elastic unit acts independently and lacks coordination, making it impossible to ensure uniform pressure across the entire welding surface; second, the adaptive angle is limited, and it is still difficult to fully fit steep curved surfaces. Summary of the Invention

[0004] The purpose of this invention is to provide a welding apparatus for automotive interior parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A welding device for automotive interior parts includes a welding platform, a welding robot arm for welding is mounted on one side of the welding platform, and a fixing mechanism is mounted through the top of the welding platform. When the automotive interior parts are being welded, the fixing mechanism can fix the automotive interior parts. The fixing mechanism includes two bidirectional screws rotatably mounted on the top of the inner cavity of the welding platform, and threaded blocks are threadedly connected to both sides of the surface of the two bidirectional screws. A mounting bracket is fixedly mounted on the top of the threaded blocks, and the mounting bracket passes through the welding platform and extends to the top of the welding platform. The mounting bracket has a first electric push rod slidably mounted on both sides of the top, and an adaptive clamping unit is fixedly mounted on the telescopic end of the first electric push rod. When the automotive interior parts are fixed, the adaptive clamping unit can be fixed according to the shape of the automotive interior parts to improve the stability during fixing. The adaptive clamping unit includes a mounting housing fixedly installed on the telescopic end of the first electric push rod. A plurality of first piston cylinders are installed through the bottom of the mounting housing, and a first piston plate is slidably installed inside each of the first piston cylinders. A first piston rod is fixedly installed at the bottom of the first piston plate. The bottom end of the first piston rod passes through the first piston cylinder and extends to the bottom end of the first piston cylinder. A telescopic column is provided at the bottom of the first piston rod, and an adaptive fitting component is provided at the bottom of the telescopic column. A piston spring is fixedly installed at the top of the first piston plate. The top end of the piston spring is fixedly connected to the top of the inner cavity of the first piston cylinder. A connecting pipe is connected to the top of the first piston cylinder. The interior of the mounting housing is filled with hydraulic oil.

[0006] Preferably, the top of the first piston plate is provided with an oil inlet hole, the first piston plate and the first piston rod are connected through the oil inlet hole, a push block is slidably installed inside the first piston rod, and a slide rod is fixedly installed at the bottom of the push block. The bottom end of the slide rod passes through the first piston rod and extends to the bottom end of the first piston rod. The end of the slide rod located outside the first piston rod is fixedly connected to the top of the telescopic column. A second return spring is fixedly installed between the push block and the inner wall of the first piston rod. Both the top of the welding platform and the interior of the mounting housing are equipped with stamping units. When the adaptive clamping unit fixes the automotive interior parts, the stamping units can pressurize the interior of the mounting housing to further improve the stability of the automotive interior parts during fixing.

[0007] Preferably, the stamping unit includes a pressure plate slidably installed inside the mounting housing, and hydraulic oil fills the bottom of the pressure plate. A third return spring is fixedly installed around the top of the pressure plate, and the top of the third return spring is fixedly connected to the top of the inner cavity of the mounting housing. The welding platform has two piston cylinders installed around its top perimeter. A second piston plate is slidably mounted inside each piston cylinder. A fourth return spring is fixedly mounted at the bottom of the second piston plate, with its bottom end fixedly connected to the bottom of the inner cavity of the second piston cylinder. A second piston rod is fixedly connected to the top of the second piston plate, with its top end penetrating the second piston cylinder and extending to the outside of it. The second piston rod is located at... A placement plate is fixedly installed at one end of the exterior of the second piston cylinder. An air pipe is connected to the bottom of one side of the placement plate. The end of the air pipe away from the second piston cylinder passes through the mounting frame and extends to the top of the inner side of the mounting frame. A flexible hose is connected to the end of the air pipe inside the mounting frame. The bottom end of the flexible hose is connected to one side of the top of the mounting housing.

[0008] Preferably, a pressure relief unit is installed on one side of the mounting housing. When the stamping unit pressurizes the interior of the mounting housing, the pressure relief unit can relieve pressure when the internal pressure of the mounting housing is too high. The pressure relief unit includes a pressure relief housing fixedly installed on one side of the mounting housing. A connecting hole is provided at the bottom of one side of the pressure relief housing, and the pressure relief housing is connected to the mounting housing through the connecting hole. A pressure relief pipe is fixedly installed inside the connecting hole. A baffle is slidably installed on one side of the inside of the pressure relief pipe, and a pressure spring is fixedly installed on one side of the baffle. A pressure adjusting plate is fixedly installed at one end of the pressure spring. A threaded sleeve is installed through one end of the pressure relief pipe. An adjusting screw is rotatably connected to the side of the pressure adjusting plate away from the pressure spring. One end of the adjusting screw passes through the threaded sleeve and is threadedly connected to the threaded sleeve. A handle is fixedly installed at the end of the adjusting screw located outside the pressure relief pipe. A limiting ring for limiting the position is fixedly installed on one side inside the pressure relief pipe, and several oil supply holes for pressure relief are opened between the pressure relief pipe and the inner wall of the pressure relief shell.

[0009] Preferably, a movable plate is slidably installed inside the pressure relief housing, and a T-shaped movable rod is fixedly connected to the top of the movable plate. The top end of the T-shaped movable rod penetrates the pressure relief housing and extends to the outside of the pressure relief housing. A return spring is fixedly installed on the top of the movable plate and on the surface of the T-shaped movable rod. The bottom of the pressure relief housing is connected to a return oil pipe, and one end of the return oil pipe passes through the mounting housing and is connected to the mounting housing. A pressure valve is installed on the surface of the return oil pipe.

[0010] Preferably, the adaptive fitting component includes a mounting base disposed at the bottom of the telescopic column, a spherical joint is fixedly connected to the bottom end of the mounting base, and a fitting end is sleeved on the surface of the spherical joint. A mounting groove is spaced between the fitting end and the spherical joint, and a plurality of first return springs are fixedly installed around the surface of the spherical joint and inside the mounting groove. The top of the mounting base is fixedly mounted with a mounting screw, and the top of the mounting screw passes through the telescopic column and is threadedly connected to the telescopic column.

[0011] Preferably, pulleys are mounted on the surfaces of both bidirectional screws, and a transmission belt is wound around the surface of the pulleys. The two pulleys are connected by the transmission belt. A driven bevel gear is mounted on the surface of one of the bidirectional screws. A servo motor is mounted on one side inside the welding platform. An active bevel gear is fixedly mounted on the output end of the servo motor. The active bevel gear and the driven bevel gear are meshed together. The mounting bracket has strip-shaped holes on both sides of its top, and sliders are slidably installed inside each of the two strip-shaped holes. The sliders are fitted onto the surface of the first electric push rod. A rack is fixedly installed on one side of each of the two sliders. A linkage gear is rotatably installed on the top of the inner cavity of the mounting bracket. The rack and the linkage gear are meshed together. A second electric push rod is fixedly installed inside one of the strip-shaped holes, and the telescopic end of the second electric push rod is fixedly connected to the slider.

[0012] Preferably, a first slide rail is fixedly installed around the inside of the first piston cylinder, and a groove adapted to the first slide rail is formed around the surface of the first piston plate. The first piston plate is slidably connected to the first slide rail through the groove.

[0013] Preferably, a second slide rail is fixedly installed on the top of both sides of the inner cavity of the mounting housing, and a slide groove adapted to the second slide rail is opened on both sides of the pressure plate, and the pressure plate is slidably connected to the second slide rail through the slide groove.

[0014] Preferably, two third slide rails are fixedly installed on one side inside the pressure relief pipe, and the top and bottom of the pressure regulating plate are provided with limiting grooves that are adapted to the third slide rails. The pressure regulating plate is slidably connected to the third slide rails through the limiting grooves.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes an adaptive clamping unit to install several first piston cylinders through the bottom of the mounting housing. Each first piston cylinder contains a first piston plate and a first piston rod. The first piston plate can move under the action of a piston spring. When the adaptive clamping unit contacts the automotive interior trim, each first piston rod can automatically extend and retract according to the shape and surface undulation of the trim. Simultaneously, the hydraulic oil filling the mounting housing and each first piston cylinder are connected by connecting pipes, allowing the hydraulic oil to flow freely between the first piston cylinders. Due to the flow characteristics of the hydraulic oil, the actions of each first piston rod can coordinate with each other. For example, if a first piston rod is subjected to greater pressure and contracts upward, the hydraulic oil in that first piston cylinder will flow to other first piston cylinders through the connecting pipes, pushing the other first piston rods to make corresponding adjustments. This ensures that the entire welding surface receives uniform pressure, thus avoiding defects such as incomplete welding and poor appearance that are easily generated by traditional rigid pressure plates. 2. The present invention, through the setting of the adaptive fitting component, has a mounting groove between the fitting end sleeved on the surface of the spherical joint and the spherical joint, and several first return springs are installed around the surface of the spherical joint. When the fitting end contacts the curved surface of the automotive interior part, due to the special structure of the spherical joint, the fitting end can flexibly adjust the angle according to the shape of the interior part. The fitting end can rotate around the spherical joint to adapt to the tilt angle of the curved surface. During the adjustment of the fitting end angle, the first return spring will generate corresponding elastic force according to the position change of the fitting end, ensuring that the fitting end can stably fit on the curved surface of the interior part after the angle is adjusted. At the same time, the telescopic column and the first piston rod further enhance the adaptive capability of the device. The telescopic column can extend and retract within a certain range, and combined with the telescopic action of the first piston rod, the device can fit completely even when facing steep curved surfaces. 3. Through the setting of the stamping unit, when the automotive interior parts are placed on the placement plate, the placement plate will descend under the weight of the interior parts and the clamping force of the adaptive clamping unit. The descent of the placement plate will drive the second piston plate to slide down in the second piston cylinder, compressing the fourth return spring. During the compression process, the gas in the second piston cylinder is transported to the mounting housing through the air pipe and hose. The gas entering the mounting housing pushes the pressure plate down to pressurize the hydraulic oil in the mounting housing, thereby further improving the stability of the automotive interior parts during fixing and ensuring that the interior parts will not shift during the welding process. 4. This invention, through the design of the pressure relief unit, allows hydraulic oil to exert pressure on the baffle in the pressure relief pipe when the internal pressure of the mounting housing is too high. This pressure pushes the baffle to compress the pressure spring. When the pressure exceeds the set value, hydraulic oil enters the pressure relief housing through the oil inlet to relieve pressure, thus preventing damage to the device and automotive interior parts due to excessive pressure. Simultaneously, by rotating the handle, the position of the adjusting screw can be adjusted to change the preload of the pressure spring, thereby adjusting the set value of the pressure relief pressure. The movable plate and return oil pipe enable the return flow of hydraulic oil after pressure relief. When hydraulic oil enters the pressure relief housing, the movable plate rises under the pressure of the hydraulic oil. When the pressure inside the mounting housing decreases, the movable plate descends under the action of the return spring and cooperates with the T-shaped movable rod, causing the mounting housing to contact the top of the mounting bracket's inner cavity when it resets. This pushes the hydraulic oil, which then enters the return oil pipe through the pressure valve, allowing the hydraulic oil to flow back into the mounting housing, thereby improving the reliability of this invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixing mechanism structure of the present invention; Figure 3 This is a cross-sectional view of the mounting housing of the present invention; Figure 4 This is a cross-sectional view of the first piston cylinder of the present invention; Figure 5 This is a cross-sectional view of the first piston rod of the present invention; Figure 6 This is a schematic diagram of the adaptive bonding component structure of the present invention; Figure 7 This is a schematic diagram of the pressure relief unit structure of the present invention; Figure 8 This is a cross-sectional view of the pressure relief pipe of the present invention; Figure 9 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 10 This is a partial structural diagram of the fixing mechanism of the present invention.

[0017] In the diagram: 10. Welding platform; 20. Welding robot; 30. Fixing mechanism; 31. Bidirectional screw; 32. Threaded block; 33. Mounting bracket; 34. First electric push rod; 35. Adaptive clamping unit; 351. Mounting housing; 352. First piston cylinder; 353. First piston plate; 354. First piston rod; 355. Telescopic column; 356. Adaptive bonding assembly; 3561. Mounting base; 3562. Spherical joint; 3563. Fitting end; 3564. Mounting groove; 3565. First return spring; 3566. Mounting screw; 357. Piston spring; 358. Connecting pipe; 359. Oil inlet; 3501. Push block; 3502. Slide rod; 3503. Second return spring; 3505. First slide rail; 36. Stamping unit; 361. Pressure plate; 362. Third return spring; 363. Second piston cylinder; 364. Second piston plate; 365. Fourth return spring; 366. Second piston rod; 367. Placement plate; 368. Air pipe; 369. Hose; 3601. Second slide rail; 37. Pressure relief unit; 371. Pressure relief housing; 372. Connecting hole; 373. Pressure relief pipe; 374. Baffle; 375. Pressure spring; 376. Pressure adjusting plate; 377. Threaded sleeve; 378. Adjusting screw; 379. Handle; 3701. Limiting ring; 3702. 3703. Oil inlet; 3704. Movable plate; 3705. T-shaped movable rod; 3706. Return spring; 3707. Oil return pipe; 3708. Pressure valve; 3709. Third slide rail; 3000. Pulley; 3000. Drive belt; 301. Driven bevel gear; 302. Servo motor; 303. Driven bevel gear; 304. Strip hole; 305. Slider; 306. Rack; 307. Linkage gear; 308. Second electric push rod. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-10 The present invention provides a technical solution: A welding device for automotive interior parts includes a welding platform 10, a welding robot 20 for welding is mounted on one side of the welding platform 10, and a fixing mechanism 30 is mounted through the top of the welding platform 10. When the automotive interior parts are being welded, the fixing mechanism 30 can fix the automotive interior parts. The fixing mechanism 30 includes two bidirectional screws 31 rotatably mounted on the top of the inner cavity of the welding platform 10, and threaded blocks 32 are threadedly connected to both sides of the surface of the two bidirectional screws 31. A mounting bracket 33 is fixedly mounted on the top of the threaded blocks 32, and the mounting bracket 33 passes through the welding platform 10 and extends to the top of the welding platform 10. The first electric push rod 34 is slidably mounted on both sides of the top of the mounting bracket 33, and the telescopic end of the first electric push rod 34 is fixedly mounted with an adaptive clamping unit 35. When the automotive interior parts are fixed, the adaptive clamping unit 35 can be fixed according to the shape of the automotive interior parts to improve the stability during fixing. The adaptive clamping unit 35 includes a mounting housing 351 fixedly installed on the telescopic end of the first electric push rod 34. A plurality of first piston cylinders 352 are installed through the bottom of the mounting housing 351, and a first piston plate 353 is slidably installed inside each of the first piston cylinders 352. A first piston rod 354 is fixedly installed at the bottom of the first piston plate 353. The bottom end of the first piston rod 354 passes through the first piston cylinder 352 and extends to the bottom end of the first piston cylinder 352. A telescopic column 355 is provided at the bottom of the first piston rod 354, and an adaptive fitting component 356 is provided at the bottom of the telescopic column 355. A piston spring 357 is fixedly installed at the top of the first piston plate 353. The top end of the piston spring 357 is fixedly connected to the top of the inner cavity of the first piston cylinder 352. A connecting pipe 358 is connected to the top of the first piston cylinder 352. The interior of the mounting housing 351 is filled with hydraulic oil.

[0020] Reference Figure 3 , Figure 4 as well as Figure 5As shown, the top of the first piston plate 353 is provided with an oil inlet hole 359. The first piston plate 353 and the first piston rod 354 are connected through the oil inlet hole 359. A push block 3501 is slidably installed inside the first piston rod 354, and a slide rod 3502 is fixedly installed at the bottom of the push block 3501. The bottom end of the slide rod 3502 passes through the first piston rod 354 and extends to the bottom end of the first piston rod 354. One end of the slide rod 3502 located outside the first piston rod 354 is fixedly connected to the top of the telescopic column 355. A second return spring 3503 is fixedly installed between the push block 3501 and the inner wall of the first piston rod 354. Both the top of the welding platform 10 and the interior of the mounting housing 351 are equipped with stamping units 36. When the adaptive clamping unit 35 fixes the automotive interior parts, the stamping unit 36 ​​can pressurize the interior of the mounting housing 351 to further improve the stability of the automotive interior parts during fixing. In this embodiment, when the adaptive clamping unit 35 contacts the automotive interior trim, each first piston rod 354 can automatically extend and retract according to the shape and surface undulation of the interior trim. At the same time, the hydraulic oil filled in the mounting housing 351 and each first piston cylinder 352 are connected by a connecting pipe 358, allowing the hydraulic oil to flow freely between each first piston cylinder 352. Due to the flow characteristics of the hydraulic oil, the actions of each first piston rod 354 can coordinate with each other. For example, if a first piston rod 354 is subjected to greater pressure and contracts upward, the hydraulic oil in that first piston cylinder 352 will flow to other first piston cylinders 352 through the connecting pipe 358, pushing other first piston rods 354 to make corresponding adjustments, thereby ensuring that the entire welding surface can obtain uniform pressure, so as to avoid defects such as incomplete welding and poor appearance that are easily generated by the traditional rigid pressure plate 361.

[0021] Reference Figure 3 As shown, the stamping unit 36 ​​includes a pressure plate 361 that is slidably installed inside the mounting housing 351, and hydraulic oil is filled at the bottom of the pressure plate 361. A third return spring 362 is fixedly installed around the top of the pressure plate 361, and the top of the third return spring 362 is fixedly connected to the top of the inner cavity of the mounting housing 351. The welding platform 10 has a second piston cylinder 363 installed around its top. A second piston plate 364 is slidably installed inside the second piston cylinder 363. A fourth return spring 365 is fixedly installed at the bottom of the second piston plate 364, and the bottom end of the fourth return spring 365 is fixedly connected to the bottom of the inner cavity of the second piston cylinder 363. A second piston rod 366 is fixedly connected to the top of the second piston plate 364. The top end of the second piston rod 366 passes through the second piston cylinder 363 and extends to the outside of the second piston cylinder 363. A placement plate 367 is fixedly installed at the end of the second piston rod 366 located outside the second piston cylinder 363. A gas pipe 368 is connected to the bottom of one side of the placement plate 367. The end of the gas pipe 368 away from the second piston cylinder 363 passes through the mounting bracket 33 and extends to the top of the inner side of the mounting bracket 33. A hose 369 is connected to the end of the gas pipe 368 located inside the mounting bracket 33. The bottom end of the hose 369 is connected to one side of the top of the mounting housing 351. In this embodiment, when the automotive interior trim is placed on the placement plate 367, the placement plate 367 will descend under the weight of the interior trim and the clamping force of the adaptive clamping unit 35. The descent of the placement plate 367 will cause the second piston plate 364 to slide down inside the second piston cylinder 363, compressing the fourth return spring 365. During the compression process, the gas inside the second piston cylinder 363 is transported to the mounting housing 351 through the air pipe 368 and the hose 369. The gas entering the mounting housing 351 pushes the pressure plate 361 down to pressurize the hydraulic oil inside the mounting housing 351, thereby further improving the stability of the automotive interior trim when it is fixed and ensuring that the interior trim will not shift during the welding process.

[0022] Reference Figure 7 as well as Figure 8 As shown, a pressure relief unit 37 is installed on one side of the mounting housing 351. When the stamping unit 36 ​​pressurizes the inside of the mounting housing 351, the pressure relief unit 37 can relieve the pressure when the pressure inside the mounting housing 351 is too high. The pressure relief unit 37 includes a pressure relief housing 371 fixedly installed on one side of the mounting housing 351. A connecting hole 372 is provided at the bottom of one side of the pressure relief housing 371, connecting the pressure relief housing 371 and the mounting housing 351. A pressure relief pipe 373 is fixedly installed inside the connecting hole 372. A baffle 374 is slidably installed on one side of the inside of the pressure relief pipe 373, and a pressure spring 375 is fixedly installed on one side of the baffle 374. A pressure regulating plate 376 is fixedly installed at one end of the pressure spring 375. The pressure relief pipe 37... One end of the pressure relief pipe 373 is fitted with a threaded sleeve 377. The side of the pressure regulating plate 376 away from the pressure spring 375 is rotatably connected to an adjusting screw 378. One end of the adjusting screw 378 passes through the threaded sleeve 377 and is threadedly connected to the threaded sleeve 377. A handle 379 is fixedly installed at the end of the adjusting screw 378 located outside the pressure relief pipe 373. A limiting ring 3701 for limiting is fixedly installed on one side inside the pressure relief pipe 373. Several oil supply holes 3702 for pressure relief are opened between the pressure relief pipe 373 and the inner wall of the pressure relief housing 371. In this embodiment, when the internal pressure of the mounting housing 351 is too high, the hydraulic oil will exert pressure on the baffle 374 in the pressure relief pipe 373, pushing the baffle 374 to compress the pressure spring 375. When the pressure exceeds the set value, the hydraulic oil will enter the pressure relief housing 371 through the oil inlet 3702 to relieve pressure, thereby avoiding damage to the device and automotive interior parts due to excessive pressure. At the same time, by turning the handle 379, the position of the adjusting screw 378 can be adjusted to change the preload of the pressure spring 375, thereby adjusting the set value of the pressure relief pressure.

[0023] Reference Figure 7 As shown, a movable plate 3703 is slidably installed inside the pressure relief housing 371. A T-shaped movable rod 3704 is fixedly connected to the top of the movable plate 3703. The top end of the T-shaped movable rod 3704 passes through the pressure relief housing 371 and extends to the outside of the pressure relief housing 371. A return spring 3705 is fixedly installed on the top of the movable plate 3703 and on the surface of the T-shaped movable rod 3704. A return oil pipe 3706 is connected to the bottom of the pressure relief housing 371. One end of the return oil pipe 3706 passes through the mounting housing 351 and is connected to the mounting housing 351. A pressure valve 3707 is installed on the surface of the return oil pipe 3706. In this embodiment, the movable plate 3703 and the return oil pipe 3706 enable the return of hydraulic oil after pressure relief. When hydraulic oil enters the pressure relief housing 371, the movable plate 3703 will rise under the pressure of the hydraulic oil. When the pressure inside the mounting housing 351 decreases, the movable plate 3703 will descend under the action of the return spring 3705 and cooperate with the T-shaped movable rod 3704 so that when the mounting housing 351 is reset, it contacts the top of the inner cavity of the mounting bracket 33, pushes the hydraulic oil, and enters the return oil pipe 3706 through the pressure valve 3707, so that the hydraulic oil returns to the mounting housing 351, thereby improving the reliability of the device.

[0024] Reference Figure 5 as well as Figure 6 As shown, the adaptive fitting assembly 356 includes a mounting base 3561 disposed at the bottom of the telescopic column 355. A spherical joint 3562 is fixedly connected to the bottom end of the mounting base 3561, and a fitting end 3563 is sleeved on the surface of the spherical joint 3562. A mounting groove 3564 is spaced between the fitting end 3563 and the spherical joint 3562. A plurality of first return springs 3565 are fixedly installed around the surface of the spherical joint 3562 and inside the mounting groove 3564. A mounting screw 3566 is fixedly installed at the top end of the mounting base 3561, and the top end of the mounting screw 3566 passes through the telescopic column 355 and is threadedly connected to the telescopic column 355. In this embodiment, when the fitting end 3563 contacts the curved surface of the automotive interior trim, due to the special structure of the spherical joint 3562, the fitting end 3563 can flexibly adjust its angle according to the shape of the interior trim. The fitting end 3563 can rotate around the spherical joint 3562 to adapt to the tilt angle of the curved surface. During the adjustment of the angle of the fitting end 3563, the first return spring 3565 will generate corresponding elastic force according to the position change of the fitting end 3563, ensuring that the fitting end 3563 can stably fit on the curved surface of the interior trim after the angle is adjusted.

[0025] Reference Figure 9 as well as Figure 10 As shown, pulleys 38 are mounted on the surfaces of both bidirectional screws 31, and a transmission belt 39 is wound around the surface of the pulleys 38. The two pulleys 38 are connected by the transmission belt 39. A driven bevel gear 301 is mounted on the surface of one bidirectional screw 31. A servo motor 302 is mounted on one side inside the welding platform 10. An active bevel gear 303 is fixedly mounted on the output end of the servo motor 302. The active bevel gear 303 and the driven bevel gear 301 are meshed. The mounting bracket 33 has two strip-shaped holes 304 on both sides of its top, and a slider 305 is slidably installed inside each of the two strip-shaped holes 304. The slider 305 is sleeved on the surface of the first electric push rod 34. A rack 306 is fixedly installed on one side of each of the two sliders 305. A linkage gear 307 is rotatably installed on the top of the inner cavity of the mounting bracket 33. The rack 306 and the linkage gear 307 are meshed. A second electric push rod 308 is fixedly installed inside one of the strip-shaped holes 304. The telescopic end of the second electric push rod 308 is fixedly connected to the slider 305. In this embodiment, during the welding process, the second electric push rod 308 can push the slider 305 to slide within the slot 304. The sliding of the slider 305 will drive the first electric push rod 34 to move. At the same time, since the rack 306 on the slider 305 meshes with the linkage gear 307, when the slider 305 moves, the linkage gear 307 will rotate, causing the two first electric push rods 34 to move synchronously in opposite directions, so as to further adjust the position of the adaptive clamping unit 35 and ensure that the adaptive clamping unit 35 can always provide stable pressure to the automotive interior parts during the welding process.

[0026] Reference Figure 4 As shown, a first slide rail 3505 is fixedly installed around the inside of the first piston cylinder 352, and a groove adapted to the first slide rail 3505 is opened around the surface of the first piston plate 353. The first piston plate 353 is slidably connected to the first slide rail 3505 through the groove.

[0027] Reference Figure 3 As shown, the top of both sides of the inner cavity of the mounting housing 351 is fixedly installed with a second slide rail 3601, and both sides of the pressure plate 361 are provided with a slide groove that matches the second slide rail 3601. The pressure plate 361 is slidably connected to the second slide rail 3601 through the slide groove.

[0028] Reference Figure 8 As shown, two third slide rails 3708 are fixedly installed on one side inside the pressure relief pipe 373. The top and bottom of the pressure regulating plate 376 are provided with limiting grooves that are adapted to the third slide rails 3708. The pressure regulating plate 376 is slidably connected to the third slide rails 3708 through the limiting grooves.

[0029] Working principle: When welding automotive interior parts is required, the servo motor 302 is started. The servo motor 302 drives the active bevel gear 303 to rotate. The active bevel gear 303 meshes with the driven bevel gear 301. Since the driven bevel gear 301 is fixedly connected to the bidirectional screw 31, the rotation of the active bevel gear 303 will drive the bidirectional screw 31 to rotate. The threaded blocks 32 on both sides of the surface of the bidirectional screw 31 will move under the action of the threads. The threaded blocks 32 drive the mounting bracket 33 to move to the appropriate position. The automotive interior trim is then placed on the placement plate 367, and the first electric push rod 34 is activated. The telescopic rod of the first electric push rod 34 extends, causing the adaptive pressing unit 35 to descend. The telescopic column 355 at the bottom of the first piston rod 354 in the adaptive pressing unit 35 and the adaptive fitting component 356 first contact the surface of the automotive interior trim. When in contact with the surface of the interior trim, each first piston rod 354 will extend or retract according to the shape and surface undulation of the interior trim. For example, when encountering a raised part on the surface of the interior trim, the corresponding first piston rod 354 will retract upward under pressure, and the first piston plate 353 will slide upward within the first piston cylinder 352, compressing the piston spring 357. When encountering a concave part, the first piston rod 354 will extend downward under the elastic force of the piston spring 357. Furthermore, since the mounting housing 351 is filled with hydraulic oil, and each first piston cylinder 352 is connected by a connecting pipe 358, the hydraulic oil will flow between each first piston cylinder 352. When a first piston rod 354 contracts, the hydraulic oil in that first piston cylinder 352 will flow to other first piston cylinders 352 through the connecting pipe 358, pushing other first piston rods 354 to make corresponding adjustments, so that the actions of each first piston rod 354 are coordinated with each other, so as to further ensure the uniform pressure of the entire welding surface. When the adaptive fitting component 356 comes into contact with the curved surface of the automotive interior trim, the fitting end 3563 can flexibly adjust its angle under the action of the spherical joint 3562 to adapt to the shape of the curved surface of the interior trim. When encountering an inclined curved surface, the fitting end 3563 will rotate around the spherical joint 3562, and the first return spring 3565 will generate corresponding elastic force according to the position change of the fitting end 3563, ensuring that the fitting end 3563 can stably fit on the curved surface of the interior trim after adjusting the angle. At the same time, the telescopic cooperation of the telescopic column 355 further enhances the device's adaptability to curved surfaces. The placement plate 367 descends under the weight of the automotive interior parts and the pressure of the adaptive clamping unit 35. The descent of the placement plate 367 causes the second piston plate 364 to slide down inside the second piston cylinder 363, compressing the fourth return spring 365. As the second piston plate 364 slides down, the gas inside the second piston cylinder 363 is compressed. The gas is transported to the mounting housing 351 through the air pipe 368 and the hose 369. The gas entering the mounting housing 351 pushes the pressure plate 361 down, pressurizing the hydraulic oil inside the mounting housing 351. When the internal pressure of the housing 351 is too high, the hydraulic oil will exert a large pressure on the baffle 374 in the pressure relief pipe 373, pushing the baffle 374 to compress the pressure spring 375. When the pressure exceeds the set value, the hydraulic oil will enter the pressure relief housing 371 through the oil supply hole 3702 to relieve pressure, thereby avoiding damage to the device and automotive interior parts caused by excessive pressure. When hydraulic oil enters the pressure relief housing 371, the movable plate 3703 will rise under the pressure of the hydraulic oil. When the pressure inside the mounting housing 351 decreases, the movable plate 3703 will fall under the action of the return spring 3705 and cooperate with the T-shaped movable rod 3704 so that when the mounting housing 351 is reset, it will contact the top of the inner cavity of the mounting bracket 33, push the hydraulic oil, and enter the return oil pipe 3706 through the pressure valve 3707, so that the hydraulic oil can flow back into the mounting housing 351.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding apparatus for automotive interior parts, comprising a welding platform (10), wherein a welding robot (20) for welding is mounted on one side of the welding platform (10), characterized in that: A fixing mechanism (30) is installed through the top of the welding platform (10). When the automotive interior parts are welded, the fixing mechanism (30) can fix the automotive interior parts. The fixing mechanism (30) includes two bidirectional screws (31) rotatably mounted on the top of the inner cavity of the welding platform (10), and threaded blocks (32) are threadedly connected to both sides of the surface of the two bidirectional screws (31). A mounting bracket (33) is fixedly mounted on the top of the threaded block (32), and the mounting bracket (33) passes through the welding platform (10) and extends to the top of the welding platform (10). The mounting bracket (33) has a first electric push rod (34) slidably mounted on both sides of the top, and the telescopic end of the first electric push rod (34) is fixedly mounted with an adaptive clamping unit (35). When the car interior parts are fixed, the adaptive clamping unit (35) can be fixed according to the shape of the car interior parts to improve the stability during fixing. The adaptive clamping unit (35) includes a mounting housing (351) fixedly installed on the telescopic end of the first electric push rod (34). A plurality of first piston cylinders (352) are installed through the bottom of the mounting housing (351), and a first piston plate (353) is slidably installed inside each of the plurality of first piston cylinders (352). A first piston rod (354) is fixedly installed at the bottom of the first piston plate (353), and the bottom end of the first piston rod (354) passes through the first piston cylinder (352) and extends to the first piston cylinder. At the bottom of (352), a telescopic column (355) is provided at the bottom of the first piston rod (354), and an adaptive fitting component (356) is provided at the bottom of the telescopic column (355). A piston spring (357) is fixedly installed on the top of the first piston plate (353). The top of the piston spring (357) is fixedly connected to the top of the inner cavity of the first piston cylinder (352). A connecting pipe (358) is connected to the top of the first piston cylinder (352). The interior of the mounting housing (351) is filled with hydraulic oil.

2. The welding device for automotive interior parts according to claim 1, characterized in that: The first piston plate (353) has an oil inlet hole (359) at its top. The first piston plate (353) and the first piston rod (354) are connected through the oil inlet hole (359). A push block (3501) is slidably installed inside the first piston rod (354), and a slide rod (3502) is fixedly installed at the bottom of the push block (3501). The bottom end of the slide rod (3502) passes through the first piston rod (354) and extends to the bottom end of the first piston rod (354). One end of the slide rod (3502) located outside the first piston rod (354) is fixedly connected to the top of the telescopic column (355). A second return spring (3503) is fixedly installed between the push block (3501) and the inner wall of the first piston rod (354). The top of the welding platform (10) and the interior of the mounting housing (351) are both equipped with stamping units (36). When the adaptive clamping unit (35) fixes the automotive interior parts, the stamping unit (36) can pressurize the interior of the mounting housing (351) to further improve the stability of the automotive interior parts during fixing.

3. The welding device for automotive interior parts according to claim 2, characterized in that: The stamping unit (36) includes a pressure plate (361) that is slidably installed inside the mounting housing (351), and hydraulic oil is filled at the bottom of the pressure plate (361). A third return spring (362) is fixedly installed around the top of the pressure plate (361), and the top of the third return spring (362) is fixedly connected to the top of the inner cavity of the mounting housing (351). The welding platform (10) has a second piston cylinder (363) installed around its top. A second piston plate (364) is slidably installed inside the second piston cylinder (363). A fourth return spring (365) is fixedly installed at the bottom of the second piston plate (364), and the bottom end of the fourth return spring (365) is fixedly connected to the bottom of the inner cavity of the second piston cylinder (363). A second piston rod (366) is fixedly connected to the top of the second piston plate (364). The top end of the second piston rod (366) passes through the second piston cylinder (363) and extends to the outside of the second piston cylinder (363). The second piston rod (366) is located at... A placement plate (367) is fixedly installed at one end of the second piston cylinder (363). A gas pipe (368) is connected to the bottom of one side of the placement plate (367). The end of the gas pipe (368) away from the second piston cylinder (363) passes through the mounting bracket (33) and extends to the top of the inner side of the mounting bracket (33). The end of the gas pipe (368) located inside the mounting bracket (33) is connected to a flexible hose (369). The bottom end of the flexible hose (369) is connected to one side of the top of the mounting housing (351).

4. The welding device for automotive interior parts according to claim 3, characterized in that: A pressure relief unit (37) is installed on one side of the mounting housing (351). When the stamping unit (36) pressurizes the inside of the mounting housing (351), the pressure relief unit (37) can relieve the pressure when the pressure inside the mounting housing (351) is too high. The pressure relief unit (37) includes a pressure relief housing (371) fixedly installed on one side of the mounting housing (351). A connecting hole (372) is provided at the bottom of one side of the pressure relief housing (371). The pressure relief housing (371) and the mounting housing (351) are connected through the connecting hole (372). A pressure relief pipe (373) is fixedly installed inside the connecting hole (372). A baffle (374) is slidably installed on one side of the inside of the pressure relief pipe (373), and a pressure spring is fixedly installed on one side of the baffle (374). (375), a pressure regulating plate (376) is fixedly installed at one end of the pressure spring (375), a threaded sleeve (377) is installed through one end of the pressure relief pipe (373), an adjusting screw (378) is rotatably connected to the side of the pressure regulating plate (376) away from the pressure spring (375), one end of the adjusting screw (378) passes through the threaded sleeve (377) and is threadedly connected to the threaded sleeve (377), and a handle (379) is fixedly installed at the end of the adjusting screw (378) located outside the pressure relief pipe (373); A limiting ring (3701) for limiting is fixedly installed on one side inside the pressure relief pipe (373), and a number of oil supply holes (3702) for pressure relief are opened between the pressure relief pipe (373) and the inner wall of the pressure relief housing (371).

5. The welding apparatus for automotive interior parts according to claim 4, characterized in that: A movable plate (3703) is slidably installed inside the pressure relief housing (371). A T-shaped movable rod (3704) is fixedly connected to the top of the movable plate (3703). The top end of the T-shaped movable rod (3704) passes through the pressure relief housing (371) and extends to the outside of the pressure relief housing (371). A return spring (3705) is fixedly installed on the top of the movable plate (3703) and on the surface of the T-shaped movable rod (3704). The bottom of the pressure relief housing (371) is connected to the oil return pipe (3706), and one end of the oil return pipe (3706) passes through the mounting housing (351) and is connected to the mounting housing (351). A pressure valve (3707) is installed on the surface of the oil return pipe (3706).

6. The welding apparatus for automotive interior parts according to claim 1, characterized in that: The adaptive fitting component (356) includes a mounting base (3561) disposed at the bottom of the telescopic column (355). A spherical joint (3562) is fixedly connected to the bottom end of the mounting base (3561), and a fitting end (3563) is sleeved on the surface of the spherical joint (3562). A mounting groove (3564) is spaced between the fitting end (3563) and the spherical joint (3562). A plurality of first return springs (3565) are fixedly installed around the surface of the spherical joint (3562) and inside the mounting groove (3564). The top end of the mounting base (3561) is fixedly mounted with a mounting screw (3566), and the top end of the mounting screw (3566) passes through the telescopic column (355) and is threadedly connected to the telescopic column (355).

7. The welding apparatus for automotive interior parts according to claim 1, characterized in that: Both bidirectional screws (31) are equipped with pulleys (38) on their surfaces. A transmission belt (39) is wound around the surface of the pulleys (38), and the two pulleys (38) are connected by the transmission belt (39). A driven bevel gear (301) is installed on the surface of one of the bidirectional screws (31). A servo motor (302) is installed on one side inside the welding platform (10). An active bevel gear (303) is fixedly installed at the output end of the servo motor (302). The active bevel gear (303) and the driven bevel gear (301) are meshed. The mounting bracket (33) has strip-shaped holes (304) on both sides of its top, and sliders (305) are slidably installed inside the two strip-shaped holes (304). The sliders (305) are sleeved on the surface of the first electric push rod (34). A rack (306) is fixedly installed on one side of each of the two sliders (305). A linkage gear (307) is rotatably installed on the top of the inner cavity of the mounting bracket (33). The rack (306) and the linkage gear (307) are meshed. A second electric push rod (308) is fixedly installed inside one of the strip holes (304), and the telescopic end of the second electric push rod (308) is fixedly connected to the slider (305).

8. The welding device for automotive interior parts according to claim 2, characterized in that: The first piston cylinder (352) is fixedly installed with a first slide rail (3505) around its interior. The first piston plate (353) has grooves around its surface that are adapted to the first slide rail (3505). The first piston plate (353) is slidably connected to the first slide rail (3505) through the grooves.

9. The welding device for automotive interior parts according to claim 3, characterized in that: The top of both sides of the inner cavity of the mounting housing (351) is fixedly installed with a second slide rail (3601). Both sides of the pressure plate (361) are provided with a slide groove that matches the second slide rail (3601). The pressure plate (361) is slidably connected to the second slide rail (3601) through the slide groove.

10. A welding apparatus for automotive interior parts according to claim 5, characterized in that: Two third slide rails (3708) are fixedly installed on one side inside the pressure relief pipe (373). The top and bottom of the pressure regulating plate (376) are provided with limiting grooves that are compatible with the third slide rails (3708). The pressure regulating plate (376) is slidably connected to the third slide rails (3708) through the limiting grooves.

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