An ultrasonic welding positioning system for an automobile body-in-white

Abstract

The application is suitable for the automobile manufacturing technical field, and provides an automobile body-in-white ultrasonic welding positioning system, which comprises a floating positioning frame, a welding machine and an ultrasonic welding plate, the welding machine is installed on the floating positioning frame, the ultrasonic welding plate is installed at the bottom of the welding machine, and the automobile body-in-white ultrasonic welding positioning system further comprises a slag removing assembly which is installed on the welding machine and comprises a sliding frame which is slidingly connected to the outer wall of the welding machine; the beneficial effects of the embodiment of the application are as follows: the scraper on the sliding plate will scrape the surface of the compression roller during the movement of the sliding plate and the scraper, so that the welding slag on the surface of the compression roller is quickly removed under the combined action of the centrifugal force during the self-rotation of the compression roller and the scraping of the scraper; the residue will move to the opening of the groove on the groove; when the residue moves and falls on the baffle, the baffle is in a horizontal state and temporarily stores the residue; after the sliding plate is reset, the magnetic block and the baffle are opposite to each other, the baffle is turned to an inclined state, so that the residue falls from the surface of the baffle.

Description

Technical Field

[0001] This invention belongs to the field of automotive manufacturing technology, and in particular relates to an ultrasonic welding positioning system for automotive body-in-white. Background Technology

[0002] In the automotive manufacturing industry, the welding quality of the body-in-white directly affects the structural strength and safety of the entire vehicle. Ultrasonic welding technology is widely used in the connection process of thin sheet metal parts of the body-in-white due to its advantages such as small heat-affected zone, high welding efficiency, and no need for filler materials.

[0003] Metal shavings generated during welding easily adhere to the surface of the welding plate and surrounding pressed components. If not removed in time, they will not only affect the sealing and precision of subsequent welding, but may also cause surface scratches due to embedded debris. Traditional cleaning methods require frequent machine shutdowns, while existing slag removal devices mostly use a single scraping structure, which is difficult to adapt to the cleaning needs of curved components such as pressure rollers, and the collection and discharge of residues can easily cause secondary pollution to the workpiece.

[0004] Under the action of ultrasonic high-frequency vibration and local high temperature, the thin body sheet is prone to warping or denting deformation due to thermal stress concentration. If it is not adjusted in time during welding, the strength of the welded body will be affected by the deformation. Existing equipment cannot dynamically adjust the tension force during body welding according to different sheet thicknesses and different weld point positions, and its applicable range is small. Summary of the Invention

[0005] The purpose of this invention is to provide an ultrasonic welding positioning system for automotive body-in-white, which aims to solve the technical problems existing in the prior art mentioned in the background.

[0006] This invention is implemented as follows: an ultrasonic welding positioning system for automotive body-in-white includes a floating positioning frame, a welding machine, and an ultrasonic welding plate. The welding machine is mounted on the floating positioning frame, and the ultrasonic welding plate is mounted on the bottom of the welding machine. The system also includes:

[0007] A slag removal assembly is installed on a welding machine. The slag removal assembly includes a slide, which is slidably connected to the outer wall of the welding machine. A pressure roller is rotatably connected inside the slide. A bevel gear is fixedly connected to the side wall of the pressure roller. The bevel gear meshes with a first bevel gear rotatably connected to the side wall of the slag removal assembly. A first gear is fixedly connected to one side of the outer wall of the slide. The first gear engages with a sliding plate slidably connected to the bottom of the slide.

[0008] The transmission assembly, located inside the carriage, is used to drive the slide plate laterally at the bottom of the carriage;

[0009] The anti-deformation component, located at the bottom of the carriage, is used to reverse tension the body-in-white during welding.

[0010] A support assembly, located at the bottom of the carriage, is used to flatten the periphery of the body-in-white during welding.

[0011] The slide plate has a second toothed groove on its side wall, which meshes with the first gear. The upper surface of the slide plate has symmetrical grooves, and the grooves have openings on the side away from the pressure roller. Multiple scrapers are fixedly connected to the upper surface of the slide plate near the pressure roller. A first spring is fixedly connected between the inner wall of the slide plate and the inner wall of the carriage. A partition is rotatably connected to the bottom of the slide plate near the groove opening. A magnetic block with the same magnetic pole as the partition is fixedly connected to the top of the inner cavity of the carriage.

[0012] As the scraper on the slide moves along with the slide, it scrapes the surface of the pressure roller, causing the welding slag on the surface of the pressure roller to fall off quickly under the combined action of centrifugal force and scraping by the scraper when the pressure roller rotates.

[0013] As a preferred technical solution of the present invention: the transmission component includes a first rack, the first rack is fixedly connected to the outer wall of the welding machine, a lead screw is rotatably connected inside the slide, a second gear that meshes with the first rack is fixedly connected to one end of the lead screw near the first rack, and the slide plate is threadedly connected to the outer wall of the lead screw.

[0014] As another preferred technical solution of the present invention: the anti-deformation component includes a first mounting plate, the first mounting plate being slidably fitted on the bottom of the carriage, the inner sidewall of the first mounting plate being rotatably connected to a second bevel gear, the sidewall of the second bevel gear being provided with first tooth grooves in a circular array, the sidewall of the carriage being fixedly connected to a second rack meshing with the first tooth groove, the sidewall of the carriage being slidably connected to a frame meshing with the second bevel gear, and suction cups being symmetrically installed at the bottom of the frame.

[0015] As another preferred technical solution of the present invention: a sliding rod is symmetrically fixedly connected to the top of the first platform, the sliding rod is slidably connected to the inside of the slide frame, and a second spring is fixedly connected between the first platform and the slide frame.

[0016] As another preferred technical solution of the present invention: the support component includes an inclined plate, the inclined plate is fixedly connected to the top of the first mounting plate, a locking plate is slidably connected inside the carriage, the locking plate will engage with the first toothed groove after sliding, the inclined plate and the locking plate are slidably engaged, a grooved plate is slidably connected to the outer wall of the welding machine, a support plate is symmetrically fixedly connected to the bottom of the welding machine with the ultrasonic welding plate as the center, a second mounting plate is symmetrically slidably connected to the support plate, and a connecting rod is rotatably connected between the bottom of the grooved plate and the second mounting plate.

[0017] As another preferred technical solution of the present invention: a workbench is installed below the floating positioning frame, a cylinder is installed on the outer wall of the welding machine, and the output end of the cylinder is fixedly connected to the top of the slide.

[0018] As another preferred technical solution of the present invention: the bottom surface of the first mounting plate is horizontal with the bottom surface of the suction cup, and the side of the outer wall of the slide plate close to the first mounting plate is inclined.

[0019] As another preferred technical solution of the present invention: the inclined panel and the card plate are both inclined and parallel on the side that are close to each other.

[0020] The beneficial effects of the embodiments of the present invention are as follows:

[0021] 1. As the scraper on the slide moves along with the slide, it scrapes the surface of the pressure roller, causing the welding slag on the surface of the pressure roller to fall off quickly under the combined action of centrifugal force and scraping by the scraper when the pressure roller rotates. The residue moves towards the opening of the groove. When the residue moves and falls onto the partition, the partition is in a horizontal state and will temporarily store the residue. When the slide returns to its original position, the magnetic block and the partition are in relative position, and the partition will flip to an inclined state, so that the residue falls off the surface of the partition and falls to the side away from the white body.

[0022] 2. When the second bevel gear rotates, it drives the frame to slide upward through meshing. Through its multiplication transmission, the upward movement distance of the frame is greater than the upward movement distance of the first mounting plate. This causes the suction cup to bend upward on both sides of the welding point of the body-in-white, forming a reverse deformation on the body-in-white to be welded. This avoids the problem of the body bending at both ends due to local high temperature during welding, which would cause deformation of the body-in-white after welding.

[0023] 3. The sliding of the second mounting plate extends the support surface of the body-in-white, dispersing the force on the bottom of the body-in-white during welding and reducing the deformation of the body-in-white caused by pressure welding. The carriage and the slot plate move synchronously after the body-in-white presses against the first mounting plate, allowing the equipment to adapt to different frame thicknesses. The second mounting plate is adjusted after the body-in-white contacts the first mounting plate, thus ensuring that the tension of the second mounting plate can act on body-in-whites of different thicknesses. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided in an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of the overall structure provided in an embodiment of the present invention;

[0026] Figure 3 This is an exploded view of the floating positioning frame structure provided in an embodiment of the present invention;

[0027] Figure 4 This is a partial schematic diagram of the welding machine structure provided in an embodiment of the present invention;

[0028] Figure 5 This is an exploded view of the slag removal component structure provided in an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of the transmission component structure provided in an embodiment of the present invention;

[0030] Figure 7 This is a cross-sectional view of the slag removal component structure provided in an embodiment of the present invention;

[0031] Figure 8 This is a partial schematic diagram of the anti-deformation component structure provided in an embodiment of the present invention;

[0032] Figure 9 This is an exploded view of the anti-deformation component structure provided in an embodiment of the present invention;

[0033] Figure 10 This is an exploded view of the support component structure provided in an embodiment of the present invention;

[0034] Figure 11 This is a cross-sectional schematic diagram of the support component structure provided in an embodiment of the present invention.

[0035] In the diagram: 1. Workbench; 2. Floating positioning frame; 3. Welding machine; 4. Ultrasonic welding plate; 5. Cylinder; 6. Slag removal assembly; 7. Transmission assembly; 8. Anti-deformation assembly; 9. Support assembly;

[0036] 61. Carriage; 62. Pressure roller; 63. Bevel gear disc; 64. First bevel gear; 65. First gear; 66. Slide plate;

[0037] 71. First rack; 72. Second gear; 73. Lead screw;

[0038] 81. First mounting plate; 82. Second bevel gear; 83. First tooth groove; 84. Second rack; 85. Frame; 86. Suction cup;

[0039] 91. Sloping panel; 92. Clamping plate; 93. Groove plate; 94. Support plate; 95. Second mounting plate; 96. Connecting rod;

[0040] 661. Second tooth groove; 662. Groove; 663. Scraper; 664. First spring; 665. Partition; 666. Magnetic block;

[0041] 811. Second spring; 812. Sliding rod. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0044] like Figures 1 to 5 As shown, in one embodiment, an ultrasonic welding positioning system for automotive body-in-white is proposed, including a floating positioning frame 2, a welding machine 3, and an ultrasonic welding plate 4. The welding machine 3 is mounted on the floating positioning frame 2, and the ultrasonic welding plate 4 is mounted on the bottom of the welding machine 3. The system also includes:

[0045] The slag removal assembly 6 is installed on the welding machine 3. The slag removal assembly 6 includes a slide 61, which is slidably connected to the outer wall of the welding machine 3. A pressure roller 62 is rotatably connected inside the slide 61. A bevel gear disk 63 is fixedly connected to the side wall of the pressure roller 62. The bevel gear disk 63 meshes with a first bevel gear 64 rotatably connected to the side wall of the slag removal assembly 6. A first gear 65 is fixedly connected to one side of the outer wall of the slide 61. The first gear 65 cooperates with a slide plate 66 slidably connected to the bottom of the slide 61.

[0046] The transmission assembly 7 is located inside the carriage 61 and is used to drive the slide plate 66 laterally at the bottom of the carriage 61.

[0047] Anti-deformation component 8 is located at the bottom of carriage 61 and is used to reverse tension the body-in-white during welding.

[0048] Support component 9, located at the bottom of carriage 61, is used to flatten the periphery of the body-in-white during welding.

[0049] In practical application, the floating positioning frame 2 moves the welding machine 3 to the position where the body-in-white needs to be welded. Then, the slide 61 slides on the outer wall of the welding machine 3 towards the ultrasonic welding plate 4. The pressure roller 62 and the ultrasonic welding plate 4 will squeeze the position where the body-in-white needs to be welded. At the same time, the ultrasonic welding plate 4 is energized and completes the welding of the body-in-white through ultrasound. After the body-in-white is welded, the slide 61 slides upward on the welding machine 3. The second gear 72 and the first rack 71 mesh to drive the lead screw 73 to rotate, so that the slide plate 66 slides at the bottom of the slide 61 towards the side close to the pressure roller 62. When the slide plate 66 slides, it will drive the first gear 65 and the first bevel gear 64 to rotate through meshing. When the first bevel gear 64 rotates, it will mesh with the bevel gear disk 63 and drive the pressure roller 62 to rotate together. With the sliding of the slide plate 66 towards the pressure roller 62 and the rotation of the pressure roller 62, the welding slag on the surface of the pressure roller 62 can be scraped by the slide plate 66 and fall off the surface of the pressure roller 62.

[0050] like Figure 5 and Figure 7 As shown, in a preferred embodiment of the present invention, the slide plate 66 has a second toothed groove 661 on its side wall, which meshes with the first gear 65. The upper surface of the slide plate 66 has symmetrical grooves 662, with an opening on the side of the grooves 662 away from the pressure roller 62. A plurality of scrapers 663 are fixedly connected to the side of the upper surface of the slide plate 66 near the pressure roller 62. A first spring 664 is fixedly connected between the inner wall of the slide plate 66 and the inner wall of the slide frame 61. A partition plate 665 is rotatably connected to the bottom of the slide plate 66 near the opening of the groove 662. A magnetic block 666 with the same magnetic pole as the partition plate 665 is fixedly connected to the top of the inner cavity of the slide frame 61.

[0051] In practical application, when the slide plate 66 slides at the bottom of the carriage 61, it drives the first gear 65 to rotate through the meshing of the second tooth groove 661 and the first gear 65. The groove 662 on the top of the slide plate 66 guides the welding slag falling off the pressure roller 62 through the inclined surface at its bottom and the limiting on both sides. As the scraper 663 on the slide plate 66 moves together with the slide plate 66, it scrapes the surface of the pressure roller 62, thereby removing the welding slag from the surface of the pressure roller 62. During rotation, the centrifugal force and the scraper 663 work together to quickly remove the residue. The residue on the groove 662 will move towards the opening of the groove 662. When the residue moves and falls onto the partition 665, the partition 665 is in a horizontal state and will temporarily store the residue. When the slide plate 66 is reset, the magnetic block 666 and the partition 665 are positioned relative to each other, and the partition 665 will flip to an inclined state, so that the residue falls off the surface of the partition 665 and can fall to the side away from the white body.

[0052] like Figure 6As shown, in another preferred embodiment of the present invention, the transmission assembly 7 includes a first rack 71, which is fixedly connected to the outer wall of the welding machine 3. A lead screw 73 is rotatably connected inside the slide 61. A second gear 72 that meshes with the first rack 71 is fixedly connected to one end of the lead screw 73 near the first rack 71. A slide plate 66 is threadedly connected to the outer wall of the lead screw 73.

[0053] In practical application, when the cylinder 5 pushes the slide 61, the movement of the slide 61 will drive the lead screw 73 and the second gear 72 to move together inside the slide 61. When the second gear 72 moves vertically, it will mesh with the first rack 71 and rotate. When the second gear 72 and the lead screw 73 rotate, the slide plate 66 will slide at the bottom of the slide 61 through the surface thread groove.

[0054] like Figure 8 and Figure 9 As shown, in another preferred embodiment of the present invention, the anti-deformation component 8 includes a first mounting plate 81, which is slidably fitted on the bottom of the carriage 61. A second bevel gear 82 is rotatably connected to the inner sidewall of the first mounting plate 81. The sidewall of the second bevel gear 82 is provided with first tooth grooves 83 arranged in a circular array. A second rack 84 that meshes with the first tooth groove 83 is fixedly connected to the sidewall of the carriage 61. A frame 85 that meshes with the second bevel gear 82 is slidably connected to the sidewall of the carriage 61. Suction cups 86 are symmetrically installed at the bottom of the frame 85.

[0055] In practical application, when the slide 61 slides down the surface of the welding machine 3, the bottom of the suction cup 86 will first contact the surface of the body-in-white. After the suction cup 86 is squeezed against the body-in-white, it will adhere to the surface of the body-in-white. As the slide 61 continues to slide down, the bottom of the first mounting plate 81 will contact the surface of the body-in-white. The first mounting plate 81 will slide upward inside the slide 61. The second rack 84 and the first tooth groove 83 mesh to drive the second bevel gear 82 to rotate. When the second bevel gear 82 rotates, it drives the frame 85 to slide upward through meshing. Through its multiplication transmission, the upward movement distance of the frame 85 is greater than the upward movement distance of the first mounting plate 81, so that the suction cup 86 forms an upward bend on both sides of the welding point of the body-in-white, and forms a reverse deformation on the body-in-white to be welded. This avoids the problem of the body bending at both ends due to local high temperature during welding, which would cause deformation of the body-in-white after welding.

[0056] like Figure 9 As shown, in another preferred embodiment of the present invention, a sliding rod 812 is symmetrically fixedly connected to the top of the first mounting plate 81, the sliding rod 812 is slidably connected to the inside of the slide frame 61, and a second spring 811 is fixedly connected between the first mounting plate 81 and the slide frame 61.

[0057] In practical application, when the bottom of the first mounting plate 81 is pressed against the body-in-white, the second spring 811 elastically contracts. When the slide 61 moves upward so that the first mounting plate 81 no longer presses against the body-in-white, the second spring 811 elastically extends. The first mounting plate 81 is limited to vertical sliding within the workbench 1 by the slide rod 812.

[0058] like Figure 10 and Figure 11 As shown, in another preferred embodiment of the present invention, the support component 9 includes an inclined plate 91, which is fixedly connected to the top of the first mounting plate 81. A retaining plate 92 is slidably connected inside the slide 61, and the inclined plate 91 and the retaining plate 92 are slidably engaged. A grooved plate 93 is slidably connected to the outer wall of the welding machine 3. A support plate 94 is symmetrically fixedly connected to the bottom of the welding machine 3 with the ultrasonic welding plate 4 as the center. A second mounting plate 95 is symmetrically slidably connected to the support plate 94. A connecting rod 96 is rotatably connected between the bottom of the grooved plate 93 and the second mounting plate 95.

[0059] In practical application, when the carriage 61 moves downward and the first mounting plate 81 contacts the body-in-white, the upward movement of the first mounting plate 81 inside the carriage 61 will cause the inclined panel 91 to press against the clamping plate 92. Under the pressure of the inclined panel 91, the clamping plate 92 slides towards the side closer to the welding machine 3. After sliding, the clamping plate 92 will engage with the first toothed groove 83, causing the grooved plate 93 and the carriage 61 to slide downward synchronously. When the grooved plate 93 slides down, it drives the second mounting plate 95 to slide relatively away from the surface of the support plate 94 through the connecting rod 96. During sliding, the body-in-white placed on top is slightly tensioned. At the same time, the sliding of the second mounting plate 95 extends the support surface of the body-in-white, dispersing the force on the bottom of the body-in-white during welding and reducing the deformation of the body-in-white caused by pressure welding. Only after the body-in-white presses against the first mounting plate 81 will the slide 61 and the slot plate 93 move synchronously, allowing the equipment to adapt to different frame thicknesses. After the body-in-white contacts the first mounting plate 81, the second mounting plate 95 is adjusted to ensure that the tension of the second mounting plate 95 can act on body-in-white of different thicknesses.

[0060] like Figures 1 to 3 As shown, in another preferred embodiment of the present invention, a workbench 1 is installed below the floating positioning frame 2, and a cylinder 5 is installed on the outer wall of the welding machine 3. The output end of the cylinder 5 is fixedly connected to the top of the slide 61.

[0061] In practical application, the body-in-white to be welded is installed on the workbench 1, and the cylinder 5 slides the carriage 61 on the outer wall of the welding machine 3 by extending and retracting the output end.

[0062] like Figure 8As shown, in another preferred embodiment of the present invention, the bottom surface of the first mounting plate 81 is horizontal to the bottom surface of the suction cup 86, and the outer wall of the slide plate 66 is inclined on the side near the first mounting plate 81.

[0063] like Figure 11 As shown, in another preferred embodiment of the present invention, the sides of the inclined panel 91 and the card plate 92 that are close to each other are both inclined and parallel.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrasonic welding positioning system for automotive body-in-white, comprising a floating positioning frame (2), a welding machine (3), and an ultrasonic welding plate (4), wherein the welding machine (3) is mounted on the floating positioning frame (2), and the ultrasonic welding plate (4) is mounted on the bottom of the welding machine (3), characterized in that, Also includes: A slag removal assembly (6) is installed on a welding machine (3). The slag removal assembly (6) includes a slide (61), which is slidably connected to the outer wall of the welding machine (3). A pressure roller (62) is rotatably connected inside the slide (61). A bevel gear disc (63) is fixedly connected to the side wall of the pressure roller (62). The bevel gear disc (63) meshes with a first bevel gear (64) rotatably connected to the side wall of the slag removal assembly (6). A first gear (65) is fixedly connected to one side of the outer wall of the slide (61). The first gear (65) cooperates with a sliding plate (66) slidably connected to the bottom of the slide (61). The transmission assembly (7) is located inside the carriage (61) and is used to drive the slide (66) laterally at the bottom of the carriage (61); The anti-deformation component (8) is set at the bottom of the carriage (61) and is used to reverse tension the body-in-white during welding; Support assembly (9) is located at the bottom of carriage (61) and is used to flatten the periphery of the body-in-white during welding; The slide plate (66) has a second toothed groove (661) on its side wall, which meshes with the first gear (65). The upper surface of the slide plate (66) has symmetrical grooves (662). The grooves (662) have an opening on the side away from the pressure roller (62). Multiple scrapers (663) are fixedly connected to the side of the upper surface of the slide plate (66) near the pressure roller (62). A first spring (664) is fixedly connected between the inner wall of the slide plate (66) and the inner wall of the carriage (61). A partition plate (665) is rotatably connected to the bottom of the slide plate (66) near the opening of the groove (662). A magnetic block (666) with the same magnetic pole as the partition plate (665) is fixedly connected to the top of the inner cavity of the carriage (61). As the scraper (663) on the slide plate (66) moves together with the slide plate (66), it will scrape the surface of the pressure roller (62), so that the welding slag on the surface of the pressure roller (62) will be quickly removed under the combined action of centrifugal force and scraping by the scraper (663) when the pressure roller (62) rotates.

2. The ultrasonic welding positioning system for automotive body-in-white according to claim 1, characterized in that, The transmission assembly (7) includes a first rack (71), which is fixedly connected to the outer wall of the welding machine (3). The slide (61) is rotatably connected to a lead screw (73). The end of the lead screw (73) near the first rack (71) is fixedly connected to a second gear (72) that meshes with the first rack (71). The slide plate (66) is threadedly connected to the outer wall of the lead screw (73).

3. The ultrasonic welding positioning system for automotive body-in-white according to claim 1, characterized in that, The anti-deformation component (8) includes a first mounting plate (81), which is slidably fitted on the bottom of the carriage (61). A second bevel gear (82) is rotatably connected to the inner sidewall of the first mounting plate (81). The sidewall of the second bevel gear (82) is provided with first tooth grooves (83) arranged in a ring array. A second rack (84) that meshes with the first tooth groove (83) is fixedly connected to the sidewall of the carriage (61). A frame (85) that meshes with the second bevel gear (82) is slidably connected to the sidewall of the carriage (61). Suction cups (86) are symmetrically installed at the bottom of the frame (85).

4. The ultrasonic welding positioning system for automotive body-in-white according to claim 3, characterized in that, The top of the first platform (81) is symmetrically fixedly connected with a sliding rod (812), the sliding rod (812) is slidably connected to the inside of the slide (61), and a second spring (811) is fixedly connected between the first platform (81) and the slide (61).

5. The ultrasonic welding positioning system for automotive body-in-white according to claim 3, characterized in that, The support assembly (9) includes an inclined plate (91), which is fixedly connected to the top of the first mounting plate (81). A retaining plate (92) is slidably connected inside the slide (61). After the retaining plate (92) slides, it will engage with the first toothed groove (83). The inclined plate (91) and the retaining plate (92) are slidably engaged. A grooved plate (93) is slidably connected to the outer wall of the welding machine (3). A support plate (94) is symmetrically fixedly connected to the bottom of the welding machine (3) with the ultrasonic welding plate (4) as the center. A second mounting plate (95) is symmetrically slidably connected to the support plate (94). A connecting rod (96) is rotatably connected between the bottom of the grooved plate (93) and the second mounting plate (95).

6. The ultrasonic welding positioning system for automotive body-in-white according to claim 1, characterized in that, A workbench (1) is installed below the floating positioning frame (2), and a cylinder (5) is installed on the outer wall of the welding machine (3). The output end of the cylinder (5) is fixedly connected to the top of the slide (61).

7. The ultrasonic welding positioning system for automotive body-in-white according to claim 3, characterized in that, The bottom surface of the first mounting plate (81) is horizontal to the bottom surface of the suction cup (86), and the outer wall of the sliding plate (66) is inclined on the side near the first mounting plate (81).

8. The ultrasonic welding positioning system for automotive body-in-white according to claim 5, characterized in that, The inclined panel (91) and the card plate (92) are both inclined and parallel on the side that are close to each other.

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