Multi-point adsorption fixture for machining of thin-walled metal plate parts based on visual positioning

Abstract

The application discloses a kind of multi-point adsorption clamps for thin-walled metal plate machining based on visual positioning, including base, vacuum chuck, vacuum pipe, vacuum suction hole adjusting mechanism;Vacuum chuck is also provided with multiple positioning blocks, the top surface of vacuum chuck is provided with groove, and base is provided with visual camera;By setting vacuum suction hole adjusting mechanism, when there is no workpiece placement adsorption, vacuum suction hole self-adjusting is closed, workpiece can be placed on vacuum chuck, and multiple-point vacuum adsorption can be formed;By designing lateral positioning block, thin-walled metal plate can be positioned stably under conventional adsorption, and high-strength adsorption positioning block is not deformed;By setting groove, it can provide space for avoidance when thin-walled metal plate is processed, visual camera is connected to external control center, and its position information can be fed back, and the control center controls the processing execution mechanism to adapt to accurate processing.

Description

Technical Field

[0001] This invention belongs to the field of visual positioning fixture technology, specifically relating to a multi-point adsorption fixture for processing thin-walled metal plates based on visual positioning. Background Technology

[0002] Thin-walled metal sheet processing is very common in industrial fields, such as the production of thin-walled parts using aluminum alloys and titanium alloys. These include automotive manufacturing, where lightweight and rigid body panels, chassis components, and battery casings are required; electronics and electrical appliances, such as precision components like mobile phone / computer casings, heat sinks, and battery casings; medical devices, such as surgical instruments and imaging equipment components with high precision and hygiene requirements; and architectural decoration, such as curtain walls and metal decorative panels that combine aesthetics and functionality.

[0003] Currently, when processing thin-walled metal plates, such as grinding, cutting, drilling, and grooving, fixture positioning is required. Positioning methods include clamping fixture positioning. For example, Chinese patent document with authorization announcement number CN 113967805 B discloses an ultra-thin metal plate laser welding clamping device. The drive mechanism is started by external equipment, which drives the triangular thrust plate to rotate. The triangular thrust plate drives the clamping part to work, so that the clamping part applies force to the worktable and clamps the material to be welded placed on the tray.

[0004] Considering the potential for workpiece damage during clamping and positioning of thin-walled metal sheets, vacuum chucks are currently used for adsorption and positioning. However, vacuum chucks have the following shortcomings in actual operation: 1. Vacuum chucks are difficult to position according to different products, especially with poor lateral positioning capability; 2. Due to the small thickness of thin-walled metal sheets during processing, they are easily deformed. High negative pressure suction can easily cause deformation of thin-walled metal sheets, so only conventional negative pressure suction can be selected. In addition, considering the sealing during contact, the surface of the vacuum chuck is flat and smooth, making it easy to slide. Therefore, during workpiece processing, such as grinding and surface grooving, lateral and rotational sliding is likely to occur; 3. Currently, conventional vacuum chucks are all flat structures with suction holes on the surface. They can generally only be used for processing work that does not interfere with the vacuum chuck, such as grinding. When through-grooving or drilling is required, the vacuum chuck cannot avoid these obstacles, limiting its applicability; 4. They cannot provide feedback on workpiece position information, making it difficult to perform adaptive and precise processing, resulting in a high workpiece breakage rate. Summary of the Invention

[0005] This invention provides a multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning. By setting a vacuum suction hole adjustment mechanism, the vacuum suction hole automatically closes when no workpiece is placed for adsorption, allowing the workpiece to be placed arbitrarily on the vacuum suction cup to form multi-point vacuum adsorption. By designing lateral positioning blocks, the thin-walled metal plates can be stably positioned under conventional adsorption conditions with the high-strength, non-deformable positioning blocks, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning, comprising a base for support, the base including a bottom support plate and an upper enclosure plate; the enclosure plate forms a cavity in the middle and has an opening at the top; A vacuum suction cup, which is a flat plate placed on the surrounding plate of the base and fixed with screws, has multiple vacuum suction holes on its upper part, which connect to the vacuum cavity enclosed by the base and the vacuum suction cup. A vacuum tube, wherein the vacuum tube is provided with a connector that connects to the enclosure of the base, the connector being connected to the vacuum chamber, and the other end of the vacuum tube being connected to a negative pressure vacuum pump; The vacuum suction hole adjustment mechanism automatically closes when no workpiece is placed for adsorption, thus forming multi-point vacuum adsorption.

[0007] Preferably, the vacuum suction hole adjustment mechanism includes a stepped groove located within the vacuum suction hole. The stepped groove includes at least three steps, the diameter of which decreases from top to bottom. A filter screen is placed at the top, a sleeve is placed in the middle, and the outer wall of the sleeve is in close contact with the inner wall of the stepped groove. A through cavity is provided in the middle of the sleeve. A spring is installed in the bottom stepped groove, the bottom end of which is fixed in the groove. The spring is placed vertically, and its helical outer diameter is smaller than the inner diameter of the through cavity. A piston is also fitted inside the spring, and a stop is provided at the top of the piston. The outer diameter of the piston is smaller than the helical inner diameter of the spring, and the outer diameter of the stop is larger than the inner diameter of the through cavity. The spring elastically pushes the piston upward and away from the sleeve. A connecting hole is provided at the bottom of the stepped groove, and the diameter of the connecting hole is smaller than the diameter of the bottom stepped groove.

[0008] Preferably, the vacuum suction cup is further provided with a positioning mechanism, which includes multiple positioning blocks. The bottom surface of the positioning blocks is flat, so that when placed on the vacuum suction cup, they will be fixed by the vacuum suction cup, thereby strengthening the side positioning of the thin-walled metal plate.

[0009] Preferably, the positioning blocks have the same structure, including a positioning block suction cup and a top plate. The positioning block suction cup and the interior of the top plate form a second vacuum chamber. A second vacuum tube is fixed on one side of the top plate. The second vacuum tube is provided with a second connector that connects to the second vacuum chamber. The other end of the second vacuum tube is connected to another negative pressure vacuum pump, so that the second vacuum chamber is evacuated when the negative pressure vacuum pump is working.

[0010] Preferably, the second vacuum chamber is also provided with a vacuum suction hole adjustment mechanism, which is arranged in the opposite direction to the vacuum suction hole adjustment mechanism of the vacuum suction cup.

[0011] Preferably, the suction force of the vacuum suction hole of the positioning block suction cup is greater than that of the vacuum suction hole of the vacuum suction cup, and the positioning block is made of high-hardness wear-resistant alloy material, which generates a stronger adsorption force through its own vacuum suction hole.

[0012] Preferably, the second vacuum tubes of different positioning blocks are all connected to a single pipe, and then vacuum operation is performed by the same negative pressure vacuum pump.

[0013] Preferably, the top surface of the vacuum suction cup is provided with a groove.

[0014] Preferably, the positioning block can be placed in the groove, and the groove is also provided with vacuum suction holes. At the same time, the bottom of the vacuum suction cup at the corresponding groove protrudes with a corresponding thickness.

[0015] Preferably, a fixing rod is fixed to one side of the base, and the top of the fixing rod is fixed to a mounting plate. A vision camera is installed below the mounting plate, and the vision camera is tilted downward toward the vacuum suction cup. The vision camera is connected to an external control center, and it takes images of the workpiece being processed and feeds back the position of the workpiece to the control center. Based on the feedback position information, the control center controls the processing actuator to perform adaptive and precise processing.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a vacuum suction hole adjustment mechanism, the vacuum suction hole automatically closes when no workpiece is placed for adsorption, allowing the workpiece to be placed arbitrarily on the vacuum suction cup, thus forming multi-point vacuum adsorption; and metal plates of different sizes and structures can be positioned by multi-point vacuum adsorption.

[0017] 2. By designing lateral positioning blocks, which are made of high-hardness wear-resistant alloy material, stronger adsorption force can be generated through their own vacuum suction holes. This allows thin-walled metal plates to be stably positioned under normal adsorption conditions, in conjunction with the high-strength, non-deformable positioning blocks. Compared to the conventional method of fixing with four-sided cylinder grippers, this positioning method will not damage the workpiece, especially thin-walled plates, thus protecting the workpiece while ensuring stable positioning.

[0018] 3. The positioning blocks on all four sides allow for adaptive placement of workpieces in any orientation on the vacuum chuck; and the processing of different workpieces can be adapted to different orientations, making it more flexible and versatile.

[0019] 4. By setting grooves, clearance space can be provided when processing thin-walled metal sheets, greatly expanding the processing space, such as through slotting and drilling.

[0020] 5. The vision camera is connected to an external control center. By capturing images of the workpiece and identifying its position, the camera can provide feedback on the workpiece's position regardless of its orientation. The control center then uses this feedback to control the machining actuators for adaptive and precise machining.

[0021] 6. Visual positioning is achieved through a vision camera. Even in extreme cases, when a circular workpiece is displaced in the direction of rotation, the position of the workpiece at the control center is fed back in real time. Feedback is provided when there is a positional deviation during workpiece processing, and adjustments are made to further reduce the breakage rate of the workpiece during processing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 2 for Figure 1 A magnified structural diagram at point A; Figure 3 This is a schematic diagram of the main structure of the present invention; Figure 4 This is a cross-sectional view of the positioning block of the present invention; Figure 5 This is a top view schematic diagram of the positioning structure of a square thin-walled metal plate according to an embodiment of the present invention; Figure 6 This is a top view schematic diagram of a square thin-walled metal plate product according to an embodiment of the present invention; Figure 7 This is a top view of the groove structure of the present invention; Figure 8 This is a top view schematic diagram of the positioning structure of a circular thin-walled metal plate according to an embodiment of the present invention; Figure 9 This is a top view schematic diagram of a circular thin-walled metal plate product according to an embodiment of the present invention.

[0023] In the diagram: 1. Base; 101. Bottom support plate; 102. Enclosure plate; 2. Vacuum suction cup; 201. Vacuum suction hole; 202. Vacuum chamber; 203. Groove; 3. Vacuum tube; 301. Connector; 401. Filter screen; 402. Tube sleeve; 4021. Through cavity; 403. Spring; 404. Piston column; 4041. Stop; 405. Connecting hole; 5. Positioning block; 501. Positioning block suction cup; 502. Top plate; 503. Second vacuum chamber; 504. Second vacuum tube; 5041. Second connector; 6. Fixing rod; 601. Mounting plate; 7. Vision camera. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1 This invention provides a multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning, including... The base 1 is used for support and includes a bottom support plate 101 and an upper enclosure plate 102. The shape of the bottom support plate 101 is set according to actual needs, and generally includes mounting holes on the edge for fixing or connecting external mechanisms. The enclosure plate 102 forms a cavity in the middle and has an opening at the top for connecting the upper vacuum suction cup.

[0026] Vacuum suction cup 2 is a flat plate placed on the surrounding plate 102 of the base 1 and fixed with screws. Generally, a sealing groove is set at the connection between the surrounding plate 102 and the vacuum suction cup 2, and a sealing ring is installed in the sealing groove. Its function is to improve the sealing of the connection and prevent air leakage during negative pressure vacuum adsorption, which would affect the adsorption and fixation. The upper part of the vacuum suction cup 2 has multiple vacuum suction holes 201, which are connected to the vacuum cavity 202 enclosed by the base 1 and the vacuum suction cup 2. Thus, when the vacuum cavity 202 generates negative pressure vacuum suction, the workpiece placed above is stably adsorbed through the vacuum suction holes 201.

[0027] Vacuum tube 3 is provided with a connector 301 that connects to the enclosure 102 of the base 1. The connector is connected to the vacuum chamber 202. The other end of the vacuum tube 3 is connected to a negative pressure vacuum pump, so that when the negative pressure vacuum pump is working, the vacuum chamber 202 is evacuated to position the workpiece above.

[0028] The vacuum suction port adjustment mechanism automatically closes the vacuum suction port 201 when no workpiece is placed for adsorption, allowing the workpiece to be placed arbitrarily on the vacuum suction cup 2, thus forming multi-point vacuum adsorption.

[0029] Please see Figure 2 As one embodiment of the present invention, the vacuum suction port adjustment mechanism includes a stepped groove located within the vacuum suction port. The stepped groove includes at least three steps, the diameter of which decreases from top to bottom. A filter screen 401 is placed at the top to prevent external dust particles from entering and clogging the vacuum suction port 201, and to allow for periodic cleaning. The filter screen 401 is fixed by conventional methods such as adhesive or screws. A sleeve 402 is placed in the middle, and an annular groove is provided on the outer wall of the sleeve 402. A sealing ring is installed in the annular groove. The function of the sealing ring is to improve the sealing performance at the contact point between the sleeve 402 and the stepped groove. A through cavity 4021 is provided in the middle of the sleeve 402. A spring 403 is installed in the lowermost stepped groove. The bottom end of the spring 403 can be fixed in the groove by conventional methods such as gluing or welding. The spring 403 is placed vertically, and its helical outer diameter is smaller than the inner diameter of the through cavity 4021. A piston post 404 is also sleeved inside the spring 403. A stop 4041 is provided at the top of the piston post 404. The outer diameter of the piston post 404 is smaller than the helical inner diameter of the spring 403, and the outer diameter of the stop 4041 is larger than the inner diameter of the through cavity 4021. That is, the cross-section of the piston post 404 and the stop 4041 is a T-shaped structure. Spring 403 elastically pushes piston rod 404 upwards, disengaging it from sleeve 402. As piston rod 404 descends, stop 4041 contacts sleeve 402, sealing the upper part of cavity 4021. A connecting hole 405 is provided at the lower part of the stepped groove. The diameter of the connecting hole 405 is smaller than the diameter of the lowest stepped groove, allowing the vacuum suction hole 201 to connect to the vacuum cavity 202 without affecting the installation of spring 43 in the lowest stepped groove. By setting a vacuum suction hole adjustment mechanism, when a single vacuum suction hole 201 is not covered by a workpiece, the moment a negative pressure is generated, the adjustment mechanism will adjust the vacuum suction hole. A pressure difference is created between the upper and lower sides of the cover, and the stop head 4041 is instantly sucked onto the lower sleeve 402, blocking the passage cavity 4021 of the sleeve 402; the vacuum suction hole 201 covered by the workpiece generates negative pressure at the moment it is generated. Since the vacuum suction hole 201 is covered by the workpiece, the negative pressure will pass through the stop head 4041 to the bottom of the workpiece, creating a pressure difference between the upper and lower sides of the workpiece. This hole generates suction, so the workpiece can be placed anywhere on the vacuum suction cup 2, and multi-point vacuum adsorption can be formed; and metal plates of different sizes and structures can be positioned by multi-point vacuum adsorption.

[0030] Please see Figure 3As an embodiment of the present invention, a positioning mechanism is also provided on the vacuum suction cup 2. The positioning mechanism includes multiple positioning blocks 5. The number of positioning blocks 5 is generally at least three, which are used for multi-directional side positioning. This application selects four positioning blocks 5. The bottom surface of the positioning blocks 5 is flat, so that when they are placed on the vacuum suction cup 2, they will be fixed by the vacuum suction cup 2, which can strengthen the side positioning of thin-walled metal plates.

[0031] Please see Figure 4 As an embodiment of the present invention, the positioning blocks 5 have the same structure, including a positioning block suction cup 501 and a top plate 502. The positioning block suction cup 501 and the top plate 502 form a second vacuum chamber 503. A second vacuum tube 504 is fixed on one side of the top plate 502. The second vacuum tube 504 is provided with a second connector 5041 that connects to the second vacuum chamber 503. The other end of the second vacuum tube 504 is connected to another negative pressure vacuum pump, so that the second vacuum chamber 503 is evacuated when the negative pressure vacuum pump is working.

[0032] Please see Figure 4 As an embodiment of the present invention, a vacuum suction hole adjustment mechanism is also provided in the second vacuum chamber 503, and is arranged in the opposite direction to the vacuum suction hole 201 adjustment mechanism of the vacuum suction cup 2; thus, when the positioning block 5 generates negative pressure through the negative pressure vacuum pump, it will be tightly sucked to the vacuum suction cup 2 at the bottom, and when the second negative pressure vacuum pump generates negative pressure, it will further enhance the fixation between the vacuum suction cup 2 and the positioning block 5.

[0033] Please see Figure 4In one embodiment of the present invention, the two negative pressure vacuum pumps generate different negative pressure suction forces at the corresponding vacuum suction holes 201. The suction force of the vacuum suction hole 201 of the positioning block suction cup 501 is greater than that of the vacuum suction hole 201 of the vacuum suction cup 2. The positioning block 5 is made of high-hardness wear-resistant alloy material. During the processing of thin-walled metal plates, although there is vacuum suction hole 201 for adsorption, the negative pressure suction force of the vacuum suction hole 201 is generally small. Thin-walled metal plates are thin and easily deformed. A large negative pressure suction force can easily cause deformation of thin-walled metal plates. Only conventional negative pressure suction force can be selected. At the same time, considering the sealing performance during contact, the surface of the vacuum suction cup is flat and smooth, and easy to slide. Therefore, during the processing of the workpiece, such as grinding and surface grooving, it is easy to cause lateral and rotational lateral displacement. Sliding; This application utilizes a lateral positioning block 5, made of a high-hardness, wear-resistant alloy material. Through its own vacuum suction holes 201, it generates stronger adsorption force. The bidirectional, dual-vacuum suction holes ensure stable, non-deformable adsorption, allowing thin-walled metal plates to be stably positioned under conventional adsorption conditions using the high-strength, non-deformable positioning block 5. Compared to conventional positioning using four-sided cylinder grippers, this method avoids damaging the workpiece, especially thin-walled plates, protecting the workpiece while providing stable positioning. Furthermore, the four-sided positioning blocks 5 allow for adaptable placement of the workpiece in any direction on the vacuum suction cup 2, enabling flexible and versatile placement for different workpiece processing needs.

[0034] Please see Figures 5-6 As an embodiment of the present invention, the second vacuum tubes 504 of different positioning blocks 5 are all connected to a pipe, and then vacuum work is performed by the same negative pressure vacuum pump. Only one negative pressure vacuum pump is used to perform synchronous positioning control of all positioning blocks 5.

[0035] Please see Figure 7 As an embodiment of the present invention, the top surface of the vacuum suction cup 2 is provided with a groove 203. The shape and size of the groove 203 are set according to the actual processing needs. By setting the groove 203, clearance space can be provided when processing thin-walled metal plates. Currently, conventional vacuum suction cups 2 are all flat structures with suction holes on the surface. They can generally only perform processing work that does not interfere with the vacuum suction cup 2, such as grinding. When it is necessary to perform through grooving, drilling, or other work, the vacuum suction cup 2 cannot make clearance. However, the groove 203 design of the vacuum suction cup 2 in this application greatly expands the processing space, such as through grooving and drilling.

[0036] Please see Figure 1 , Figure 7 As an embodiment of the present invention, the positioning block 5 can be placed in the groove 203, so that when the workpiece is placed, even if the edge is above the groove 203 and the entire positioning block 5 needs to be placed in the groove 203, it can be placed adaptably, with greater flexibility. Furthermore, vacuum suction holes 201 are also distributed in the groove 203, so that the groove 203 can be arranged in various shapes as needed, and the vacuum suction holes 201 will not interfere with the arrangement of the groove 203. At the same time, the bottom of the vacuum suction cup 2 at the corresponding groove 203 is protruded with a corresponding thickness, the purpose of which is not to affect the normal arrangement of the vacuum suction hole adjustment mechanism at the vacuum suction hole 201.

[0037] Please see Figure 1 , Figure 3 , Figures 8-9 In one embodiment of the present invention, a fixing rod 6 is fixed on one side of the base 1, and the top of the fixing rod 6 is fixed by a mounting plate 601. A vision camera 7 is installed below the mounting plate 601. A high-resolution industrial camera is selected. The vision camera 7 is tilted downwards towards the vacuum suction cup 2. The vision camera 7 is connected to an external control center. It captures images of the workpiece being processed and performs conventional image processing algorithms, such as edge detection calculation, to extract information such as workpiece edges, holes, and surface grooves. It performs coordinate system positioning and then feeds back the position of the workpiece to the control center for further precise positioning. Feedback is provided when there is a positional deviation during workpiece processing. Based on the identification of the workpiece position, it can feed back the position information of the workpiece regardless of its orientation after placement. Then, the control center controls the processing execution mechanism to perform adaptive and precise processing based on the feedback position information.

[0038] If the workpiece is a circular plate with a relatively smooth outer edge, there is still room for rotational displacement when it is positioned on all four sides. Visual positioning is performed by vision camera 7. Even in extreme cases, when the circular workpiece is displaced in the rotational direction, the position of the workpiece at the control center is fed back in real time. Feedback is given when there is a positional deviation in the workpiece during processing, and the processing is adjusted to further reduce the breakage rate of the workpiece during processing.

[0039] 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 multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning, comprising a base (1), characterized in that, The base (1) is used for support and includes a bottom support plate (101) and an upper enclosure plate (102); the enclosure plate (102) forms a cavity in the middle and has an opening at the top; Vacuum suction cup (2), the vacuum suction cup (2) is a flat plate, which is placed on the surrounding plate (102) of the base (1) and fixed by screws. The upper part of the vacuum suction cup (2) is provided with multiple vacuum suction holes (201), and the vacuum suction holes (201) are connected to the vacuum cavity (202) enclosed by the base (1) and the vacuum suction cup (2). Vacuum tube (3), the vacuum tube (3) is provided with a connector (301) that is connected to the enclosure plate (102) of the base (1), the connector is connected to the vacuum chamber (202), and the other end of the vacuum tube (3) is connected to a negative pressure vacuum pump; The vacuum suction hole adjustment mechanism automatically closes the vacuum suction hole (201) when no workpiece is placed for adsorption, thus forming multi-point vacuum adsorption. The vacuum suction cup (2) is also provided with a positioning mechanism, which includes multiple positioning blocks (5). The bottom surface of the positioning block (5) is flat, so when it is placed on the vacuum suction cup (2), it will be fixed by the vacuum suction cup (2) to strengthen the side positioning of the thin-walled metal plate. The positioning blocks (5) all have the same structure, including a positioning block suction cup (501) and a top plate (502). The positioning block suction cup (501) and the top plate (502) form a second vacuum chamber (503). A second vacuum tube (504) is fixed on one side of the top plate (502). The second vacuum tube (504) is provided with a second connector (5041) that connects to the second vacuum chamber (503). The other end of the second vacuum tube (504) is connected to another negative pressure vacuum pump, so that the second vacuum chamber (503) is evacuated when the negative pressure vacuum pump is working. The second vacuum chamber (503) is also provided with a vacuum suction hole adjustment mechanism, which is set in the opposite direction to the vacuum suction hole (201) adjustment mechanism of the vacuum suction cup (2); The suction force of the vacuum suction hole (201) of the positioning block suction cup (501) is greater than that of the vacuum suction hole (201) of the vacuum suction cup (2). The positioning block (5) is made of high hardness wear-resistant alloy material, and generates stronger adsorption force through its own vacuum suction hole (201).

2. The multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning according to claim 1, characterized in that, The vacuum suction hole adjustment mechanism includes a stepped groove located within the vacuum suction hole. The stepped groove includes at least three steps, the diameter of which decreases from top to bottom. A filter screen (401) is placed at the top, and a sleeve (402) is placed in the middle. The outer wall of the sleeve (402) is in close contact with the inner wall of the stepped groove. A through cavity (4021) is provided in the middle of the sleeve (402). A spring (403) is installed in the bottom stepped groove. The bottom end of the spring (403) is fixed in the groove. The spring (403) is placed vertically, and its spiral outer diameter is smaller than that of the through cavity (4021). 1) The inner diameter of the spring (403) is further enclosed by a piston column (404). The piston column (404) has a stop (4041) at its top. The outer diameter of the piston column (404) is smaller than the helical inner diameter of the spring (403). The outer diameter of the stop (4041) is larger than the inner diameter of the cavity (4021). The spring (403) elastically pushes the piston column (404) upward to disengage from the sleeve (402). The lower part of the stepped groove has a connecting hole (405). The diameter of the connecting hole (405) is smaller than the diameter of the bottom stepped groove.

3. The multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning according to claim 1, characterized in that, The second vacuum tube (504) of each of the different positioning blocks (5) is connected to a pipe and then vacuumed by the same negative pressure vacuum pump.

4. A multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning according to claim 1, characterized in that, The top surface of the vacuum suction cup (2) is provided with a groove (203).

5. A multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning according to claim 4, characterized in that, The positioning block (5) can be placed in the groove (203), and the groove (203) is also distributed with vacuum suction holes (201). At the same time, the bottom of the vacuum suction cup (2) at the corresponding groove (203) is protruded with a corresponding thickness.

6. A multi-point adsorption fixture for processing thin-walled metal plates based on vision positioning according to claim 1, characterized in that, A fixing rod (6) is fixed on one side of the base (1). The top of the fixing rod (6) is fixed by a mounting plate (601). A vision camera (7) is installed below the mounting plate (601). The vision camera (7) is tilted downward toward the vacuum suction cup (2). The vision camera (7) is connected to an external control center. It takes pictures of the workpiece and feeds back the position of the workpiece to the control center. The control center controls the processing execution mechanism to perform adaptive and precise processing based on the feedback position information.

Images