Damage-free positioning platform for spot welding of ultra-thin sheet metal parts based on vacuum adsorption array

Abstract

The present invention relates to the technical field of vacuum adsorption positioning platforms, specifically a non-destructive positioning platform for spot welding of ultra-thin sheet metal parts based on a vacuum adsorption array, comprising a base, a vacuum suction plate 1 and a vacuum suction plate 2 distributed on the left and right sides of the top of the base being installed, and a rolling support unit and a positioning unit being installed on the vacuum suction plate 1 and the vacuum suction plate 2. When positioning the sheet metal part, the present invention uses upper and lower movable components and a limiting component to hold and limit the movable plug, so that the ball protrudes to the outside of the vacuum suction plate 1 and the vacuum suction plate 2, so that the ball can separate the sheet metal part from the top of the vacuum suction plate 1 or the vacuum suction plate 2, thereby preventing the sheet metal part from being damaged by friction with the top of the vacuum suction plate 1 or the vacuum suction plate 2 during the moving and positioning process. When adsorbing the sheet metal part, the sheet metal part can fall onto the vacuum suction plate 1 or the vacuum suction plate 2, thereby avoiding affecting the adsorption of the sheet metal part.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum adsorption positioning platforms, in particular to a damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array. Background Art

[0002] Sheet metal processing is a comprehensive cold working process for thin metal sheets. Products produced through this process are called sheet metal parts. Ultra-thin sheet metal parts refer to parts made from very thin sheet metal (typically less than 0.5mm, and even as thin as 0.1mm) through sheet metal processing. When spot welding ultra-thin sheet metal parts, traditional fixtures are very likely to cause extrusion and deformation due to their extremely small thickness.

[0003] The vacuum adsorption array is a device that uses the principle of vacuum adsorption for fixing. The adsorption plate body has array-distributed air holes to facilitate vacuum adsorption. The use of vacuum adsorption to fix ultra-thin sheet metal parts can prevent the sheet metal parts from being squeezed and deformed. However, after placing the sheet metal parts on the vacuum suction plate, in order to ensure the accuracy of welding, the sheet metal parts need to be moved to position them. Because the thickness of ultra-thin sheet metal parts is very small, they are easy to bend and deform when picked up, so the sheet metal parts are placed flat on the vacuum suction plate, and then moved to position them. After the sheet metal parts are positioned, vacuum adsorption is turned on to adsorb and fix them. In the process of moving and positioning the sheet metal, the lower surface of the sheet metal part will rub against the upper surface of the vacuum suction plate, which can easily cause wear on the sheet metal part and affect the quality of sheet metal processing. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a damage-free positioning platform for spot welding of ultra-thin sheet metal parts based on a vacuum adsorption array, including a base, on the top of which are installed vacuum suction plate 1 and vacuum suction plate 2 distributed on the left and right, and vacuum suction plate 1 and vacuum suction plate 2 are both installed with rolling support units and positioning units.

[0005] The top of the vacuum suction plate 1 is provided with a plurality of suction holes and movable grooves arranged in a matrix, the suction holes and movable grooves are distributed alternately, and the structures of the vacuum suction plate 1 and the vacuum suction plate 2 are the same.

[0006] The rolling support unit includes a movable plug that is installed in the movable groove for sliding up and down, a ball is rotatably installed on the top of the movable plug, and an upper and lower movable component corresponding to the movable plug and used to drive the movable plug to move up and down is installed on the inner ring wall of the movable groove. A limit component is installed on the movable plug to restrict its up and down movement, and a sealing component for sealing the bottom of the adsorption hole is installed in the inner cavity of the vacuum suction plate.

[0007] During vacuum adsorption, the negative pressure drives the limit assembly to release the restriction on the movable plug. The movable plug moves downward under the suction of negative pressure, and the ball drops below the top of the vacuum suction plate 1, so that the sheet metal is attached to the top of the vacuum suction plate 1. When the movable plug drops, it drives the blocking assembly to release the blockage on the bottom of the adsorption hole, so that the adsorption hole adsorbs the sheet metal.

[0008] In one possible implementation, the upper and lower movable components include a support ring 1 fixedly mounted on the bottom of the inner ring wall of the movable groove, a return spring 1 and a diaphragm fixedly connected between the top of the support ring 1 and the bottom of the movable plug, a set of the return spring is arranged on the outside of the diaphragm, and the interior of the diaphragm is connected to the inner cavity of the vacuum suction plate 1 through the inner hole of the support ring 1, and a retaining ring located between the movable plug and the support ring 1 is also fixedly mounted on the inner ring wall of the movable groove.

[0009] In one possible implementation, the limit assembly includes a connecting groove symmetrically opened front and back on the movable plug, a sleeve is installed inside the connecting groove, a limit block is installed inside the sleeve for sliding back and forth, a support ring 2 is fixedly installed on the side of the sleeve close to the center of the movable plug, a reset spring 2 is fixedly connected between the support ring 2 and the limit block, and the end of the limit block away from the center of the movable plug is plugged into the inner ring wall of the movable groove.

[0010] In one possible implementation, the connecting groove is in an inverted L-shape, the horizontal section of the connecting groove is connected to the outer ring wall of the movable plug, and the vertical section is connected to the bottom of the movable plug. The vacuum suction plate is also provided with connecting holes that are symmetrically distributed front to back about the movable groove. When the movable plug moves to the top of the movable groove, the horizontal section of the connecting groove is aligned front to back with the bottom of the connecting hole.

[0011] In one possible implementation, the sealing assembly includes a grid plate that is movably installed up and down in the inner cavity of the vacuum suction plate, and a sealing block corresponding to the adsorption hole is fixedly installed on the top of the grid plate. The sealing block is located directly below the adsorption hole, and a sealing ring is fixedly installed on the top of the sealing block. The grid plate is fixedly connected to the bottom of the movable plug through a threaded pull rod, and a support spring is fixedly connected between the bottom of the grid plate and the inner wall of the vacuum suction plate.

[0012] In one possible implementation, the positioning unit includes a slide rail 1 fixedly connected to the front and rear sides of the vacuum suction plate 2, and a slide rail 2 located on the top of the vacuum suction plate 2 is installed between the front and rear slide rails 1 for sliding left and right. Positioning blocks symmetrically distributed front and back are slidably installed on the slide rail 2, and scale lines are provided on both the slide rail 1 and the slide rail 2. The slide rail 2 is fixed to the slide rail 1 by bolts, and the positioning block is also fixed to the slide rail 2 by bolts.

[0013] In one possible implementation, the base is further provided with a rotating unit for driving the vacuum suction plate to rotate, the rotating unit includes support plates fixedly connected to the front and rear sides of the base, a rotating shaft is rotatably installed on the support plate, and a mounting frame is fixedly connected between the two front and rear rotating shafts, the vacuum suction plate is slidably installed on the mounting frame, an arc-shaped groove coaxial with the rotating shaft is provided on the support plate, a sliding rod is fixedly connected to the mounting frame, the sliding rod slides in cooperation with the arc-shaped groove, and a nut is threadedly installed on the sliding rod.

[0014] In a possible implementation, a threaded rod is threadedly connected to the left side of the mounting frame, and a right end of the threaded rod is rotatably connected to the left side of the vacuum suction plate 1.

[0015] In a possible implementation, the base is further equipped with an electric lifting platform for driving the vacuum suction plate 2 to move up and down.

[0016] Beneficial effects of the present invention: 1. When positioning the sheet metal, the upper and lower movable components and the limiting components hold and limit the movable plug, so that the ball protrudes to the outside of the vacuum suction plate 1 and the vacuum suction plate 2, so that the ball can separate the sheet metal from the top of the vacuum suction plate 1 or the vacuum suction plate 2, avoiding the sheet metal from being damaged by friction with the top of the vacuum suction plate 1 or the vacuum suction plate 2 during the movement and positioning process. When adsorbing the sheet metal, the upper and lower movable components and the limiting components release the restriction on the movable plug under the action of negative pressure suction, so that the movable plug drives the ball to move downward under the action of negative pressure, so that the sheet metal falls on the vacuum suction plate 1 or the vacuum suction plate 2, avoiding affecting the adsorption of the sheet metal.

[0017] 2. When the present invention starts to perform negative pressure adsorption, since there is a certain gap between the sheet metal and the vacuum suction plate 1 or the vacuum suction plate 2, the bottom of the adsorption hole is blocked by the blocking component, so that the adsorption hole will not generate attraction at the beginning, thereby avoiding the adsorption hole from being sucked empty. When the movable plug drives the ball to descend below the top of the vacuum suction plate 1 or the vacuum suction plate 2, the movable plug drives the blocking component to release the blockage of the adsorption hole, so that the adsorption hole generates attraction to adsorb the sheet metal, thereby improving the accuracy of sheet metal positioning.

[0018] 3. The present invention adjusts the angles of vacuum suction plate 1 and vacuum suction plate 2 through a rotating unit, so that vacuum suction plate 1 and vacuum suction plate 2 can dock sheet metal parts at different angles. By adjusting the position of vacuum suction plate 1, the left and right sides of the weld of the sheet metal part can be exposed, which is convenient for welding sheet metal parts from different angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2It is a schematic diagram of the three-dimensional structure of the vacuum suction plate 1 of the present invention.

[0021] Figure 3 It is a cross-sectional view of the rolling support unit of the present invention.

[0022] Figure 4 This invention Figure 3 A magnified image of the middle figure.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the grid plate of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning unit of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating unit of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure when the vacuum suction plate 1 and the vacuum suction plate 2 of the present invention form an obtuse angle.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure when the vacuum suction plate 1 and the vacuum suction plate 2 of the present invention form an acute angle.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the vacuum suction plate 1 and the vacuum suction plate 2 when they are staggered up and down.

[0029] In the figure: 1. Base; 2. Vacuum suction plate 1; 21. Adsorption hole; 22. Movable groove; 23. Connecting hole; 3. Vacuum suction plate 2; 4. Rolling support unit; 41. Movable plug; 42. Ball; 43. Upper and lower movable components; 431. Support ring 1; 432. Return spring 1; 433. Diaphragm; 434. Retaining ring; 44. Limiting component; 441. Connecting groove; 442. Sleeve; 443. Limiting block; 444. Support Ring 2; 445, reset spring 2; 45, blocking assembly; 451, grid plate; 452, blocking block; 453, sealing ring; 454, threaded pull rod; 455, support spring; 5, positioning unit; 51, slide rail 1; 52, slide rail 2; 53, positioning block; 6, rotating unit; 61, support plate; 62, rotating shaft; 63, mounting frame; 64, arc groove; 65, sliding rod; 66, threaded rod; 7, electric lifting platform. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] See also Figure 1 - Figure 6 A damage-free positioning platform for spot welding of ultra-thin sheet metal parts based on a vacuum adsorption array includes a base 1, and the top of the base 1 is equipped with a vacuum suction plate 2 and a vacuum suction plate 3 distributed on the left and right, and a rolling support unit 4 and a positioning unit 5 are installed on the vacuum suction plate 2 and the vacuum suction plate 3.

[0032] The top of the vacuum suction plate 1 (2) is provided with a plurality of suction holes 21 and movable grooves 22 arranged in a matrix. The suction holes 21 and movable grooves 22 are distributed alternately. The structures of the vacuum suction plate 1 (2) and the vacuum suction plate 2 (3) are identical. A vacuum suction cup valve core is also installed inside the suction hole 21. It should be noted that the vacuum suction cup valve core is a prior art. During vacuum suction, if there is no sheet metal part on the top of the suction hole 21, the vacuum suction cup valve core will close the corresponding suction hole 21 under the action of negative pressure, preventing air leakage during processing. If there is a sheet metal part on the top of the suction hole 21, the vacuum suction cup valve core will not close the corresponding suction hole 21, allowing the suction hole 21 to absorb the sheet metal part.

[0033] The rolling support unit 4 includes a movable plug 41 that is slidably installed up and down inside the movable groove 22. A ball 42 is rotatably installed on the top of the movable plug 41. An upper and lower movable component 43 corresponding to the movable plug 41 and used to drive the movable plug 41 to move up and down is installed on the inner ring wall of the movable groove 22. A limit component 44 is installed on the movable plug 41 to limit its up and down movement. A sealing component 45 for sealing the bottom of the adsorption hole 21 is installed in the inner cavity of the vacuum suction plate 2.

[0034] Before vacuum adsorption, the movable plug 41 is supported upward by the upper and lower movable components 43, so that the top of the ball 42 protrudes above the vacuum suction plate 2, and at the same time, the limit component 44 limits and locks the movable plug 41 to prevent the movable plug 41 from moving downward. Then the sheet metal parts to be welded are placed on the vacuum suction plate 1 2 and the vacuum suction plate 2 3 respectively, and the sheet metal parts are moved to the appropriate position so that the parts to be welded of the two sheet metal parts are aligned. The ball 42 can separate the sheet metal parts from the top of the vacuum suction plate 1 2 or the vacuum suction plate 2 3 to prevent the sheet metal parts from being damaged by friction with the top of the vacuum suction plate 1 2 or the vacuum suction plate 2 3 during the movement and positioning process.

[0035] During vacuum adsorption, the negative pressure drives the limit assembly 44 to release the restriction on the movable plug 41. The movable plug 41 moves downward under the suction of negative pressure, and the ball 42 drops below the top of the vacuum suction plate 2, so that the sheet metal is attached to the top of the vacuum suction plate 2. When the movable plug 41 drops, it drives the blocking assembly 45 to release the blockage on the bottom of the adsorption hole 21, so that the adsorption hole 21 adsorbs the sheet metal.

[0036] See also Figure 1 - Figure 3 The upper and lower movable components 43 include a support ring 431 fixedly installed at the bottom of the inner ring wall of the movable groove 22, and a return spring 432 and a diaphragm 433 are fixedly connected between the top of the support ring 431 and the bottom of the movable plug 41. The return spring 432 is sleeved on the outside of the diaphragm 433, and the interior of the diaphragm 433 is connected to the inner cavity of the vacuum suction plate 2 through the inner hole of the support ring 431. A retaining ring 434 is also fixedly installed on the inner ring wall of the movable groove 22 between the movable plug 41 and the support ring 431.

[0037] During specific use, the movable plug 41 is given an upward elastic force by the return spring 432, so that the movable plug 41 moves to the top of the movable groove 22, so that the top of the ball 42 protrudes above the vacuum suction plate 2; the diaphragm 433 can enclose a vacuum adsorption chamber between the support ring 431 and the movable plug 41, which is convenient for driving the movable plug 41 to move downward during negative pressure suction; when the movable plug 41 lowers the ball 42 to below the top of the vacuum suction plate 2 under the action of negative pressure suction, the retaining ring 434 can support the movable plug 41, avoid the return spring 432 and the diaphragm 433 from being over-compressed, and improve the service life of the return spring 432 and the diaphragm 433.

[0038] See also Figure 3 - Figure 4 The limiting assembly 44 includes a connecting groove 441 symmetrically opened on the movable plug 41, a sleeve 442 is installed inside the connecting groove 441, and a limiting block 443 is installed inside the sleeve 442 for sliding back and forth. A supporting ring 2 444 is fixedly installed on the side of the sleeve 442 close to the center of the movable plug 41, and a reset spring 245 is fixedly connected between the supporting ring 244 and the limiting block 443. The end of the limiting block 443 away from the center of the movable plug 41 is plugged into the inner ring wall of the movable groove 22.

[0039] During specific use, when the movable plug 41 is moved to the top of the movable groove 22, the elastic force of the return spring 2 445 is used to push the limit block 443 to move away from the center of the movable plug 41, so that the limit block 443 is inserted into the inner ring wall of the movable groove 22, thereby limiting the movable plug 41 and preventing the movable plug 41 and the ball 42 from moving downward when the sheet metal is placed on the vacuum suction plate 1 2 or the vacuum suction plate 2 3, thereby improving the stability of the ball 42 in supporting the sheet metal.

[0040] During negative pressure adsorption, the negative pressure attraction is first used to drive the limit block 443 to move toward the center of the movable plug 41, so that the limit block 443 is separated from the inner ring wall of the movable groove 22 to release the limit on the movable plug 41. At this time, the return spring 2 445 is compressed and contracted. Only after the limit is released will the movable plug 41 move downward under the action of the negative pressure attraction, and the ball 42 will drop below the top of the vacuum suction plate 2.

[0041] See also Figure 2 - Figure 4 The communicating groove 441 is in an inverted L-shape. The horizontal section of the communicating groove 441 is connected to the outer ring wall of the movable plug 41, and the vertical section is connected to the bottom of the movable plug 41. The vacuum suction plate 2 is also provided with communicating holes 23 symmetrically distributed front and back about the movable groove 22. When the movable plug 41 moves to the top of the movable groove 22, the horizontal section of the communicating groove 441 is aligned front and back with the bottom of the communicating hole 23, and the top of the communicating hole 23 is connected to the outside of the vacuum suction plate 2.

[0042] During specific use, the connecting groove 441 is used to connect the interior of the sleeve 442 with the interior of the diaphragm 433, so that the limit block 443 can move under the action of negative pressure attraction; when the limit block 443 is driven by the negative pressure attraction to move toward the center of the movable plug 41, the connecting hole 23 can connect the space on the side of the limit block 443 away from the center of the movable plug 41 with the outside of the vacuum suction plate 2, so that the limit block 443 can move normally.

[0043] See also Figure 3 and Figure 5 The sealing assembly 45 includes a grid plate 451 that is movably installed in the inner cavity of the vacuum suction plate 2. A sealing block 452 corresponding to the adsorption hole 21 is fixedly installed on the top of the grid plate 451. The blocking block 452 is located directly below the adsorption hole 21. A sealing ring 453 is fixedly installed on the top of the blocking block 452. The grid plate 451 is fixedly connected to the bottom of the movable plug 41 through a threaded pull rod 454. A support spring 455 is fixedly connected between the bottom of the grid plate 451 and the inner wall of the vacuum suction plate 2.

[0044] During specific use, before negative pressure adsorption is performed, the support spring 455 gives the grid plate 451 an upward elastic force, and at the same time the movable plug 41 gives the grid plate 451 an upward pulling force through the threaded pull rod 454, so that the blocking block 452 is blocked at the bottom of the adsorption hole 21, and the sealing ring 453 can improve the sealing effect of the blocking block 452 on the adsorption hole 21, so that the adsorption hole 21 will not generate suction before the sheet metal part contacts the vacuum suction plate 2, thereby avoiding the adsorption hole 21 being sucked empty and causing the vacuum suction cup valve core to close the adsorption hole 21.

[0045] During negative pressure adsorption, the movable plug 41 first moves downward under the action of negative pressure attraction, causing the ball 42 to gradually drop below the top of the vacuum suction plate 2. At the same time, the movable plug 41 drives the grid plate 451 and the blocking block 452 to move downward through the threaded pull rod 454. In the process of the blocking block 452 moving downward, the support spring 455 is compressed and contracted, and the sealing ring 453 gradually recovers from the compressed state. Before the sealing ring 453 is completely restored, the bottom of the adsorption hole 21 can always remain in a closed state, providing a certain time for the sheet metal to fall. When the sheet metal falls to the top of the vacuum suction plate 2, the sealing ring 453 separates from the bottom of the adsorption hole 21. At this time, the adsorption hole 21 opens to generate attraction to adsorb and fix the sheet metal.

[0046] See also Figure 1 、 Figure 6 The positioning unit 5 includes a slide rail 1 51 fixedly connected to the front and rear sides of the vacuum suction plate 2 3. A slide rail 2 52 located on the top of the vacuum suction plate 2 3 is installed between the front and rear slide rails 1 51 for sliding left and right. Positioning blocks 53 symmetrically distributed front and back are slidably installed on the slide rail 2 52. Scale lines are set on both the slide rail 1 51 and the slide rail 2 52. The slide rail 2 52 is fixed to the slide rail 1 51 by bolts, and the positioning blocks 53 are also fixed to the slide rail 2 52 by bolts.

[0047] During specific use, before positioning, first adjust the position of the slide rail 2 52 left and right to position the left and right position of the sheet metal when it is placed, then fix the slide rail 2 52 with bolts, and then slide one of the positioning blocks 53 forward and backward to position the front and rear position of the sheet metal when it is placed, and then position the positioning block 53 with bolts.

[0048] Then place the sheet metal part on the vacuum suction plate 1 2 or the vacuum suction plate 2 3, move the sheet metal part so that its two sides respectively conflict with the slide rail 2 52 and the positioning block 53, and finally slide another positioning block 53 so that the front and rear positioning blocks 53 are respectively positioned on the front and rear sides of the sheet metal part to achieve precise positioning of the sheet metal part. After the sheet metal part is positioned, it is adsorbed.

[0049] See also Figure 1 、 Figure 7 、 Figure 8 and Figure 9A rotating unit 6 for driving the vacuum suction plate 2 to rotate is also installed on the base 1. The rotating unit 6 includes a support plate 61 fixedly connected to the front and rear sides of the base 1. An angle line is provided on the support plate 61. A rotating shaft 62 is rotatably installed on the support plate 61. A mounting frame 63 is fixedly connected between the front and rear rotating shafts 62. The vacuum suction plate 2 is slidably installed on the mounting frame 63. An arc-shaped groove 64 coaxial with the rotating shaft 62 is opened on the support plate 61. A sliding rod 65 is fixedly connected to the mounting frame 63. The sliding rod 65 slides in cooperation with the arc-shaped groove 64, and a nut is threadedly installed on the sliding rod 65.

[0050] During specific use, when it is necessary to weld the sheet metal at a certain angle, after the vacuum suction plate 2 adsorbs and fixes the sheet metal, the vacuum suction plate 2 is driven to rotate by rotating the mounting frame 63, so that the angle of the sheet metal can be adjusted. The angle line on the support plate 61 can indicate the angle between the sheet metals, which is convenient for welding the sheet metal at different angles; during the rotation of the mounting frame 63, the sliding rod 65 slides along the arc groove 64. When the mounting frame 63 is rotated to a suitable angle, the sliding rod 65 is fixed by tightening the nut, so that the inclination angle of the vacuum suction plate 2 can be fixed, thereby preventing the vacuum suction plate 2 from moving during the welding process.

[0051] See also Figure 1 and Figure 9 The left side of the mounting frame 63 is threadedly connected with a threaded rod 66, and the right end of the threaded rod 66 is rotatably connected to the left side of the vacuum suction plate 2.

[0052] During specific use, by rotating the threaded rod 66 to drive the vacuum suction plate 2 to move to the left, the end of the sheet metal part close to the center of the base 1 can be exposed. When two sheet metal parts are welded at a sharp angle, welding can be performed from the outside of the angle of the sheet metal parts to avoid affecting the welding due to the small space between the two sheet metal parts.

[0053] See also Figure 1 and Figure 10 An electric lifting platform 7 for driving the vacuum suction plate 2 3 to move up and down is also installed on the base 1.

[0054] During specific use, when sheet metal parts need to be welded in an overlapping manner, the electric lifting platform 7 pushes the vacuum suction plate 2 3 to move upward, which can enable the vacuum suction plate 2 3 to drive the sheet metal part on the right to move upward, and the two sheet metal parts are supported respectively by the high and low staggered vacuum suction plates 1 2 and 2 3, so that the two sheet metal parts can be overlapped flatly, which is convenient for overlapping welding of the welding parts of the left and right sheet metal parts; compared with the traditional fully flat adsorption platform, it can avoid the bending of the welding parts of the sheet metal parts due to overlapping, thereby improving the welding accuracy.

[0055] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A damage-free positioning platform for spot welding of ultra-thin sheet metal parts based on a vacuum adsorption array, comprising a base (1), characterized in that: The top of the base (1) is provided with a vacuum suction plate 1 (2) and a vacuum suction plate 2 (3) distributed on the left and right, and a rolling support unit (4) and a positioning unit (5) are both provided on the vacuum suction plate 1 (2) and the vacuum suction plate 2 (3); The top of the vacuum suction plate 1 (2) is provided with a plurality of suction holes (21) and movable grooves (22) arranged in a matrix, the suction holes (21) and movable grooves (22) are distributed alternately, and the vacuum suction plate 1 (2) and the vacuum suction plate 2 (3) have the same structure; The rolling support unit (4) includes a movable plug (41) slidably mounted in the movable groove (22) up and down, a ball (42) being rotatably mounted on the top of the movable plug (41), an upper and lower movable assembly (43) corresponding to the movable plug (41) and used to drive the movable plug (41) to move up and down being mounted on the inner ring wall of the movable groove (22), a limit assembly (44) for limiting its upper and lower movement being mounted on the movable plug (41), and a blocking assembly (45) for blocking the bottom of the adsorption hole (21) being mounted in the inner cavity of the vacuum suction plate (2); During vacuum adsorption, the negative pressure drives the limiting component (44) to release the restriction on the movable plug (41), and the movable plug (41) moves downward under the suction of the negative pressure, and the ball (42) is lowered to below the top of the vacuum suction plate (2), so that the sheet metal part is attached to the top of the vacuum suction plate (2). When the movable plug (41) is lowered, it drives the blocking component (45) to release the blocking of the bottom of the adsorption hole (21), so that the adsorption hole (21) adsorbs the sheet metal part.

2. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1 is characterized in that: The upper and lower movable components (43) include a support ring (431) fixedly mounted on the bottom of the inner ring wall of the movable groove (22); a return spring (432) and a diaphragm (433) are fixedly connected between the top of the support ring (431) and the bottom of the movable plug (41); the return spring (432) is sleeved on the outside of the diaphragm (433); the inside of the diaphragm (433) is connected to the inner cavity of the vacuum suction plate (2) through the inner hole of the support ring (431); and a retaining ring (434) is also fixedly mounted on the inner ring wall of the movable groove (22) and located between the movable plug (41) and the support ring (431).

3. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1 is characterized in that: The limiting assembly (44) includes a connecting groove (441) symmetrically provided on the movable plug (41), a sleeve (442) is installed inside the connecting groove (441), a limiting block (443) is installed inside the sleeve (442) for sliding back and forth, a supporting ring 2 (444) is fixedly installed on one side of the sleeve (442) close to the center of the movable plug (41), a return spring 2 (445) is fixedly connected between the supporting ring 2 (444) and the limiting block (443), and an end of the limiting block (443) away from the center of the movable plug (41) is plugged into the inner ring wall of the movable groove (22).

4. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 3 is characterized in that: The communicating groove (441) is in an inverted L-shape, the horizontal section of the communicating groove (441) is connected to the outer ring wall of the movable plug (41), and the vertical section is connected to the bottom of the movable plug (41). The vacuum suction plate (2) is also provided with communicating holes (23) symmetrically distributed front and back with respect to the movable groove (22). When the movable plug (41) moves to the top of the movable groove (22), the horizontal section of the communicating groove (441) is aligned front and back with the bottom of the communicating hole (23).

5. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1 is characterized in that: The blocking assembly (45) includes a grid plate (451) movably mounted in the inner cavity of the vacuum suction plate (2) in an upper and lower manner, a blocking block (452) corresponding to each of the adsorption holes (21) is fixedly mounted on the top of the grid plate (451), the blocking block (452) is located directly below the adsorption hole (21), a sealing ring (453) is fixedly mounted on the top of the blocking block (452), the grid plate (451) is fixedly connected to the bottom of the movable plug (41) through a threaded pull rod (454), and a support spring (455) is fixedly connected between the bottom of the grid plate (451) and the inner wall of the vacuum suction plate (2).

6. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1 is characterized in that: The positioning unit (5) includes a slide rail 1 (51) fixedly connected to the front and rear sides of the vacuum suction plate 2 (3), and a slide rail 2 (52) located on the top of the vacuum suction plate 2 (3) is installed between the front and rear slide rails 1 (51) for sliding left and right. Positioning blocks (53) symmetrically distributed front and back are installed on the slide rail 2 (52). Scale lines are provided on both the slide rail 1 (51) and the slide rail 2 (52). The slide rail 2 (52) is fixed to the slide rail 1 (51) by bolts, and the positioning block (53) is also fixed to the slide rail 2 (52) by bolts.

7. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1 is characterized in that: The base (1) is also provided with a rotation unit (6) for driving the vacuum suction plate (2) to rotate. The rotation unit (6) comprises a support plate (61) fixedly connected to both the front and rear sides of the base (1). A rotating shaft (62) is rotatably mounted on the support plate (61). A mounting frame (63) is fixedly connected between the front and rear rotating shafts (62). The vacuum suction plate (2) is slidably mounted on the mounting frame (63). An arcuate groove (64) coaxial with the rotating shaft (62) is provided on the support plate (61). A sliding rod (65) is fixedly connected to the mounting frame (63). The sliding rod (65) is slidably matched with the arcuate groove (64). A nut is threadedly mounted on the sliding rod (65).

8. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 7, characterized in that: The left side of the installation frame (63) is threadedly connected to a threaded rod (66), and the right end of the threaded rod (66) is rotatably connected to the left side of the vacuum suction plate (2).

9. The damage-free positioning platform for spot welding ultra-thin sheet metal parts based on a vacuum adsorption array according to claim 1, characterized in that: The base (1) is also provided with an electric lifting platform (7) for driving the second vacuum suction plate (3) to move up and down.

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