A composite support structure for contouring vacuum suction cup

Abstract

This invention discloses a composite support structure contour vacuum chuck, which solves the technical problem that cutting fluid and foreign matter entering the chuck affect its adsorption capacity and cause insufficient rigidity. The chuck includes a vacuum chuck substrate and a sealing strip. The upper surface of the vacuum chuck substrate has multiple air channel grooves with open tops, which are connected to form an air channel network. An internal vacuum channel is also provided, with one end connected to the air channel network and the other end used to connect to an external vacuum system. The sealing strip is an elastic element, used to be placed within the air channel grooves to form a contour adsorption area adapted to the shape of the product to be processed. The upper side of the sealing strip protrudes a predetermined height from the upper end face of the air channel groove to place the product to be processed. The lower surface of the product to be processed abuts against the upper surface of the sealing strip to form an air cavity within the contour adsorption area. One end of the vacuum channel is located within the contour adsorption area, and a negative pressure difference is created by evacuating the air cavity to adsorb the product to be processed.

Description

Technical Field

[0001] This invention relates to vacuum suction cups, and more specifically to a composite support structure contour vacuum suction cup. Background Technology

[0002] A vacuum chuck is a non-mechanical clamping device that uses vacuum negative pressure (i.e., pressure lower than ambient atmospheric pressure) to adsorb and fix objects. It is widely used in industrial automation, machining, and semiconductor industries. In machining, not only are high vacuum levels and tight sealing required, but the chuck must also possess the rigidity to withstand strong cutting forces.

[0003] Most existing vacuum suction cups adopt a stripless structure. Stripless vacuum suction cups are a new type of adsorption device that breaks through the traditional sealing principle. Their core design concept is to directly generate adsorption force between the suction cup and the workpiece cross-section by utilizing microstructure, fluid mechanics, or the intrinsic properties of advanced materials. This technology aims to solve the stringent requirements of traditional suction cups regarding workpiece surface flatness, cleanliness, and airtightness, thereby expanding the application boundaries of vacuum technology in special working conditions. Existing vacuum suction cups are composed of three functional layers arranged from top to bottom:

[0004] Functional surface layer (porous adsorption layer): Made of high-strength, high-porosity sintered metal (such as bronze, ceramic, polymer), its surface is covered with uniform micron-sized pores (pore size can be designed in the range of 10-100 μm). When a vacuum is activated, air is drawn away through these micropores.

[0005] Support layer (microchannel flow channel layer): Located beneath the functional surface layer, it is made of rigid metal (such as aluminum alloy) through precision machining to create an internal three-dimensional mesh of microchannels. These channels are connected to the pores of the upper functional surface layer, forming a highly efficient and uniformly distributed vacuum transfer network, ensuring that negative pressure can be rapidly applied to the entire adsorption surface.

[0006] Substrate layer (vacuum chamber and interface layer): The bottom is a rigid sealed substrate with a flow collection chamber inside, which collects the flow of all microchannels and connects to an external vacuum system through a standard interface.

[0007] Its working principle is as follows: When the vacuum system is started, negative pressure passes through the collection chamber and microchannels, ultimately acting on the micropores of the functional surface layer, drawing air away from the microscopic gaps between the workpiece and the functional surface layer. Due to the extremely small and densely distributed pores, the negative pressure creates a low-pressure zone between the workpiece and the functional surface layer through local flow resistance, thereby adsorbing the workpiece. However, the above technical solution has the following technical problems:

[0008] 1) Low adsorption capacity

[0009] Vacuum chucks without sealing strips rely on microscopic pores, and their theoretical maximum adsorption force is limited by the permeability of the porous material and leakage of the functional surface. To achieve the same adsorption force, higher vacuum pump power or a larger adsorption area is often required, resulting in lower energy efficiency of the vacuum chuck.

[0010] 2) Chip clogging interference

[0011] Fine chips, dust, and grease generated during processing, once they penetrate the micropores of the functional surface, are extremely difficult to clean, leading to irreversible degradation or even failure of adsorption performance. This significantly reduces the practicality of this solution in machining environments. Coolant, water, or other liquids containing minute impurities, once sucked in, can not only clog the pores but also corrode sintered materials or contaminate the vacuum system. Conventional cleaning methods using high-pressure air to purge the pores are insufficient for deep cleaning and may require specialized maintenance such as ultrasonic cleaning or chemical cleaning, increasing operating costs and downtime.

[0012] 3) Insufficient rigidity

[0013] The overall structure is relatively weak in resisting strong lateral milling forces or torsional moments, posing a significant risk of "tool deflection," which seriously affects machining accuracy and surface quality, and may even cause vibration leading to accidents.

[0014] Chinese invention patent CN121201775A discloses a vacuum adsorption assembly and a vacuum suction cup, including: a cavity, an isolator, an adsorption port, and a connection port. The isolator divides the cavity into a first cavity and a second cavity. The pressure difference between the second cavity and the first cavity is controlled through the connection port to deform the isolator. In use, the isolator deforms towards the second cavity, making the space of the second cavity smaller and the space of the first cavity larger, thereby forming a negative pressure to adsorb materials, achieving double negative pressure adsorption of materials. When the isolator deforms towards the first cavity, the negative pressure in the first cavity changes to a positive pressure, releasing the adsorption of materials. By forming an adsorption surface, each cavity adsorbs independently to meet the adsorption of irregularly shaped parts. Since the first cavity and the second cavity are separated by the isolator and are independent of each other, foreign objects such as cutting fluid will not enter the second cavity, let alone the inside of the suction cup. While the above technical solution solves the problem of cutting fluid entering the suction cup, it mainly relies on the deformation of the isolator to generate negative pressure, which requires high deformation capacity and service life. Furthermore, when particles enter the first cavity, if the deformation is incomplete, the particles cannot be completely discharged smoothly, and they will accumulate in the first cavity, making subsequent cleaning more time-consuming and laborious, and affecting the adsorption effect, resulting in a reduction in both adsorption capacity and rigidity. Summary of the Invention

[0015] The purpose of this invention is to solve the technical problem that cutting fluid and foreign matter entering the suction cup affect its adsorption capacity and cause insufficient rigidity, and to provide a composite support structure contour vacuum suction cup.

[0016] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0017] A composite support structure vacuum suction cup, characterized in that it includes a vacuum suction cup base and a sealing strip;

[0018] The upper surface of the vacuum suction cup substrate has multiple air channel grooves with openings at the top. The multiple air channel grooves are connected to form an air channel network. It also has a vacuum channel inside. One end of the vacuum channel is connected to the air channel network, and the other end is used to connect to an external vacuum system.

[0019] The sealing strip is an elastic element, used to be set in the air channel groove to form a contour adsorption area that matches the shape of the product to be processed. The upper side of the sealing strip protrudes from the upper end face of the air channel groove by a preset height to place the product to be processed. The lower surface of the product to be processed abuts against the upper surface of the sealing strip to form an air cavity in the contour adsorption area.

[0020] One end of the vacuum duct is located within the conformal adsorption area. When the vacuum system is activated, the vacuum duct is used to evacuate the air chamber, creating a negative pressure difference inside the air chamber to adsorb the product to be processed.

[0021] Furthermore, the plurality of airway grooves include M parallel transverse airway grooves and N parallel longitudinal airway grooves;

[0022] Each transverse airway groove is perpendicularly intersected with its corresponding longitudinal airway groove to form a matrix airway network and multiple protrusions.

[0023] Furthermore, the composite support structure contour vacuum suction cup also includes multiple pins;

[0024] Each of the protrusions has a pin hole on its upper surface, and multiple pins are arranged along the outer ring of the contour adsorption area. The outer wall surface of the pin is in clearance fit with the product to be processed to limit the product to be processed.

[0025] Furthermore, multiple airway grooves are connected end to end to form a contoured airway, and a sealing strip is placed inside the contoured airway to form a contoured adsorption area.

[0026] Furthermore, the contour adsorption area is provided with multiple crisscrossing auxiliary airway grooves, each of which is connected to the contour airway to form an airway network.

[0027] Furthermore, the composite support structure contour vacuum suction cup also includes an auxiliary pressure plate;

[0028] The upper surface of the vacuum suction cup substrate is also provided with multiple threaded holes. One end of the auxiliary pressure plate is fastened in the threaded hole by a screw, and the bottom surface of the other end abuts against the upper surface of the product to be processed to press the product to be processed.

[0029] Furthermore, the sealing strip is a foamed silicone strip.

[0030] Furthermore, the sealing strip has a circular cross-section, and the height of the sealing strip protruding from the upper end face of the air passage groove is defined as h. The diameter of the sealing strip's cross-section is d, and its compression ratio is... Then there is ,and .

[0031] Furthermore, defining the area of ​​the mimicry adsorption region as A, then we have ;

[0032] in, For the safety factor, its value is [value missing]. ;

[0033] The cutting force exerted on the product during machining, in N;

[0034] The working vacuum level of the vacuum system, in kPa;

[0035] The air cavity leakage efficiency has a range of values. ;

[0036] This represents the maximum outer contour area of ​​the product to be processed.

[0037] Furthermore, one end of the vacuum channel is located in the central region of the upper surface of the vacuum suction cup substrate.

[0038] Compared with the prior art, the present invention has the following beneficial technical effects:

[0039] 1. This invention discloses a composite support structure contour vacuum suction cup. By setting multiple interconnected air channel grooves to form an air channel network, a larger adsorption space is provided on the vacuum suction cup substrate. The air channel grooves are sealed with sealing strips to form a contour adsorption area, making the air cavity closer to the shape of the product to be processed, improving the adsorption force and the processing stability of the product. When the vacuum system is activated, a negative pressure is formed inside the air cavity, causing the product to be processed to automatically adhere to the surface of the sealing strip, achieving an "adaptive" sealing effect. According to actual tests, it can maintain a stable negative pressure for a long time under a vacuum degree of -75KPa, completely solving the problem of workpiece loosening caused by sealing failure.

[0040] 2. This invention discloses a composite support structure contouring vacuum suction cup. Multiple air channel grooves are configured as M parallel transverse air channel grooves and N parallel longitudinal air channel grooves. The sealing strip can be enclosed within the air channel network to form any shape, adapting to a wider range of product structures and shapes. Furthermore, the grid support structure provides overall support for the product, ensuring flatness throughout the entire processing area. Uniform pressure distribution not only maximizes the effective adsorption area but also fundamentally prevents micro-deformation or seesaw effects caused by uneven pressure distribution, making it particularly suitable for precision sheet metal processing with extremely high flatness requirements. For irregularly shaped products, multiple air channel grooves can be connected end-to-end to form contouring air channels, adapting to specific products and improving compatibility. If the product is thin, auxiliary air channel grooves can be added within the contouring adsorption area. The sidewalls of these auxiliary grooves provide effective support, preventing deformation due to negative pressure and ensuring a more uniform adsorption pressure distribution within the air chamber, thus improving processing stability.

[0041] 3. This invention discloses a composite support structure for a contoured vacuum suction cup. One end of the vacuum channel is located in the central region of the upper surface of the vacuum suction cup substrate, and multiple channel grooves radiate outwards following the shortest path principle. This natural diffusion pattern extending outwards from the center achieves the shortest total channel length and the lowest flow resistance, making it particularly suitable for the geometry of circular contoured adsorption regions. Under the same vacuum source power, the circular contoured adsorption region can establish a working vacuum faster, resulting in a shorter system response time. It also reduces energy loss during transmission and improves the energy efficiency ratio.

[0042] 4. The present invention provides a composite support structure for a vacuum suction cup with an air channel groove having a certain width and an open top, which facilitates cleaning of the air channel groove outside the contouring area after processing.

[0043] 5. The present invention provides a composite support structure contouring vacuum suction cup, based on... This allows for better adjustment of the area of ​​the conformal adsorption region to A, ensuring that it meets the requirements of adsorption force for stable processing while minimizing the area of ​​the conformal adsorption region to avoid excessive adsorption force that could deform the product being processed.

[0044] 6. This invention presents a composite support structure contouring vacuum suction cup. Traditional suction cups are only suitable for machining flat workpieces and lack sufficient adsorption capacity for irregularly shaped, curved, and thin-walled parts, limiting their application in the machining of complex parts. The sealing strip in this invention can be customized according to the shape of the product to be processed. By arranging the sealing strip in different shapes, it can adapt to the adsorption needs of special products such as irregularly shaped curved surfaces and porous thin-walled parts. Addressing the problem of easy deformation of thin-walled products, this invention utilizes the flexible buffering properties of the contact area between the sealing strip and the workpiece. The special foamed silicone material can disperse the adsorption pressure and prevent plastic deformation of the workpiece due to localized stress concentration. Verification and testing have shown that this invention can stably adsorb aluminum alloy thin-walled parts with a thickness of 2mm, with a flatness error within 0.02mm after processing. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a composite support structure vacuum suction cup according to the present invention;

[0046] Figure 2 This is a three-dimensional structural diagram of the sealing strip installation of a composite support structure vacuum suction cup embodiment of the present invention;

[0047] Figure 3 This is a three-dimensional structural diagram of the product to be processed after installation in an embodiment of the composite support structure vacuum suction cup of the present invention (only a part of the vacuum suction cup substrate is shown).

[0048] Figure 4 for Figure 1 A schematic diagram of the longitudinal section at the location where the manual sliding valve is installed;

[0049] Figure 5 This is a three-dimensional structural schematic diagram of the second arrangement of the air passage groove in an embodiment of a composite support structure vacuum suction cup of the present invention;

[0050] Figure 6 This is a schematic diagram of the upper surface structure of the air passage groove in a second arrangement of an embodiment of a composite support structure vacuum suction cup of the present invention.

[0051] Figure 7 This is a three-dimensional structural schematic diagram of the third arrangement of the air passage groove in an embodiment of a composite support structure vacuum suction cup of the present invention;

[0052] Figure 8 This is a schematic diagram of the upper surface structure of the third arrangement of the air channel groove in an embodiment of a composite support structure vacuum suction cup of the present invention.

[0053] Figure 9 This is a three-dimensional structural schematic diagram of the fourth arrangement of the air channel groove in an embodiment of a composite support structure vacuum suction cup of the present invention.

[0054] The annotations in the attached figures are explained as follows:

[0055] 1. Vacuum suction cup base; 2. Air passage groove; 3. Vacuum air passage; 4. Manual sliding valve; 5. Protrusion; 6. Sealing strip; 7. Auxiliary air passage groove; 8. Auxiliary pressure plate; 9. Pin. Detailed Implementation

[0056] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0057] like Figure 1-9 As shown, this embodiment provides a composite support structure contour vacuum suction cup, including a vacuum suction cup base 1, a sealing strip 6, an auxiliary pressure plate 8, and multiple pins 9;

[0058] The upper surface of the vacuum suction cup base 1 has multiple air passage grooves 2 with openings at the top. These grooves 2 are interconnected to form an air passage network. Inside the network is a vacuum extraction passage 3. One end of the vacuum extraction passage 3 connects to the air passage network and is located in the central area of ​​the upper surface of the vacuum suction cup base 1; the other end is used to connect to an external vacuum system. The vacuum suction cup base 1 is CNC machined from aluminum alloy. The vacuum extraction passage 3 is connected to an external vacuum system via a manual sliding valve 4. Figure 4 As shown, the hand slide valve 4 is a backflow-preventing one-way hand slide valve. Based on the unidirectional flow principle of fluid mechanics, the one-way hand slide valve 4 adopts a ball valve structure. When the vacuum system suddenly stops supplying air, the hand slide valve 4 automatically closes, maintaining negative pressure inside the airway network for more than 30 minutes to prevent the product to be processed from falling. One end of the vacuum airway 3 may not be located in the central area, depending on the actual usage requirements.

[0059] The sealing strip 6 is an elastic element, which is set in the air channel groove 2 to form a contour adsorption area that matches the shape of the product to be processed. The upper side of the sealing strip 6 protrudes from the upper end face of the air channel groove 2 by a preset height to place the product to be processed. The lower surface of the product to be processed abuts against the upper side of the sealing strip 6 to form an air cavity in the contour adsorption area. One end of the vacuum channel 3 is located in the contour adsorption area. The vacuum system is activated to evacuate the air cavity through the vacuum channel 3, so as to form a negative pressure difference inside the air cavity to adsorb the product to be processed.

[0060] The sealing strip 6 has a circular cross-section. The pre-defined height of the sealing strip 6 protruding from the upper end face of the air passage groove 2 is h. The diameter of the sealing strip 6's cross-section is d, and its compression ratio is... Then there is ,and In this embodiment, h=0.5mm. When the negative pressure is activated, a negative pressure difference is formed inside the air chamber, driving the sealing strip to adhere to the surface of the workpiece, achieving "adaptive pressing". The fitting gap is ≤0.05mm, ensuring that the sealing strip 6 is in close contact with the surface of the product to be processed.

[0061] In this embodiment, the sealing strip 6 is a silicone foam strip, specifically adopting a composite structure of "silicone elastic matrix + polytetrafluoroethylene (PTFE) wear-resistant surface layer". The elastic modulus of the silicone matrix is ​​controlled at 1.2-1.5GPa to ensure deformation compensation capability; the PTFE surface layer has a thickness of 0.3mm and a surface friction coefficient ≤0.15 to improve wear resistance. At the same time, nano silica reinforcing agent is added to improve the oxidation resistance of the material and increase the service life to more than 800,000 cycles.

[0062] like Figures 1-3 As shown, the multiple airway grooves 2 include M parallel transverse airway grooves and N parallel longitudinal airway grooves. Each transverse airway groove is perpendicularly intersected by its corresponding longitudinal airway groove to form a matrix airway network and multiple protrusions 5. Each protrusion 5 has a pin hole on its upper surface. Multiple pins 9 are arranged along the outer ring of the contour adsorption area, with their outer walls fitting with the product to be processed to limit its position. By inserting pins 9 around the periphery of the product to be processed, the product is limited, preventing displacement during processing and improving installation efficiency. This ensures that the product is placed in the same position each time, improving processing efficiency and product yield. In this embodiment, By increasing the number of airway grooves 2, the adsorption pressure fluctuation range can still be guaranteed to be ≤±2N / cm² even when the vacuum pump experiences pressure fluctuations, thus improving stability. Furthermore, during vacuuming, airflow can be simultaneously extracted from multiple locations within the contour adsorption area, significantly shortening the overall vacuum establishment time.

[0063] The present invention also provides a method for arranging multiple air passage grooves 2. Figures 5-9 As shown, multiple air channel grooves 2 are connected end-to-end to form a contoured air channel. A sealing strip 6 is placed within the contoured air channel to form a contoured adsorption area. One end of the vacuum channel is connected to the contoured adsorption area. Multiple intersecting auxiliary air channel grooves 7 can also be provided within the contoured adsorption area, each auxiliary air channel groove 7 connecting to the contoured air channel to form an air channel network. One end of the vacuum channel 3 is connected to the air channel network. When the air channel grooves 2 are connected end-to-end to form a contoured air channel, the sealing strip can also be designed as a segmented contoured structure to fit the contoured air channel. A custom-fitting curved surface can be designed according to the workpiece shape to facilitate the installation of the sealing strip 6 and improve production efficiency. Contouring air channels that conform to the dimensions of the product to be processed can be customized according to the product's dimensions, thickness, and required adsorption force, improving the processing efficiency of large batches of products.

[0064] The upper surface of the vacuum suction cup base 1 is also provided with multiple threaded holes. One end of the auxiliary pressure plate 8 is fastened to the threaded hole by screws, and the bottom surface of the other end abuts against the product to be processed to press the product. When the product to be processed is thick, the auxiliary pressure plate 8 helps to press the product to be processed, thereby improving processing safety.

[0065] Let A be the area of ​​the biomimetic adsorption region, then we have ;

[0066] in, For the safety factor, its value is [value missing]. ;

[0067] The cutting force (unit: N) experienced during the machining of the product.

[0068] The working vacuum level of the vacuum system (unit: kPa);

[0069] The air cavity leakage efficiency has a value range of [value missing]. When the product surface is flat, use 0.7; when the product surface is rough, use 0.5.

[0070] This represents the maximum outer contour area of ​​the product to be processed.

[0071] In this embodiment, the groove width W of the air passage groove 2, the cross-sectional diameter d of the sealing strip 6, and the compression interference of the sealing strip 6 are all considered. The following relationship must be satisfied:

[0072] ;

[0073] For example, when d=3.5mm, W=3.1~3.2mm.

[0074] The relationship between the sealing effect of sealing strip 6 and the adsorption force F is as follows:

[0075] ;

[0076] Compression ratio At that time, and Under the premise of keeping it constant, air cavity leakage efficiency The flow rate (F) is decreasing, which cannot meet the cutting requirements.

[0077] Compression ratio At that time, excessive deformation of the sealing strip 6 leads to a reduced service life and easy rebound and air leakage;

[0078] When the groove width is too large (W>d), the sealing gap increases, the risk of leakage increases, and the adsorption force decreases.

[0079] Too narrow ( When installing the sealing strip, it is difficult to insert it, and it is crushed and damaged.

[0080] In this embodiment, the vacuum degree is in the range of -60 to -80 kPa, the safety factor η is 0.5-0.7, and the compression ratio of the sealing strip 6 is... 20%, compression interference of sealing strip 6 For a depth of 0.3-0.4mm, if a 3.5mm sealing strip is used, an airway groove 2 with a depth of 2.8mm and a width of 3.1mm should be machined to achieve optimal adsorption force.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A composite support structure contour vacuum suction cup, characterized in that: Includes a vacuum suction cup base (1) and a sealing strip (6); The upper surface of the vacuum suction cup base (1) has multiple air channel grooves (2) with open top ends. The multiple air channel grooves (2) are connected to form an air channel network. The vacuum channel (3) is also provided inside. One end of the vacuum channel (3) is connected to the air channel network, and the other end is used to connect to an external vacuum system. The sealing strip (6) is an elastic element, which is used to be set in the air channel groove (2) to form a contour adsorption area that is adapted to the shape of the product to be processed. The upper side of the sealing strip (6) protrudes from the upper end face of the air channel groove (2) by a preset height to place the product to be processed. The lower surface of the product to be processed abuts against the upper surface of the sealing strip (6) to form an air cavity in the contour adsorption area. One end of the vacuum channel (3) is located in the imitation adsorption area. When the vacuum system is activated, the vacuum channel (3) is used to evacuate the air chamber, and a negative pressure difference is formed inside the air chamber to adsorb the product to be processed.

2. The composite support structure contour vacuum suction cup according to claim 1, characterized in that: The multiple airway grooves (2) include M parallel transverse airway grooves and N parallel longitudinal airway grooves; Each transverse airway groove is perpendicularly intersected with its corresponding longitudinal airway groove to form a matrix airway network and multiple protrusions (5).

3. The composite support structure contouring vacuum suction cup according to claim 2, characterized in that: It also includes multiple pins (9); Each of the protrusions (5) has a pin hole on its upper surface, and multiple pins (9) are arranged along the outer ring of the contour adsorption area. Their outer wall surfaces are fitted with the product to be processed to limit the product to be processed.

4. The composite support structure contouring vacuum suction cup according to claim 1, characterized in that: Multiple airway grooves (2) are connected end to end to form a simulated airway, and a sealing strip (6) is set in the simulated airway to form a simulated adsorption area.

5. The composite support structure contouring vacuum suction cup according to claim 4, characterized in that: The modeling adsorption area is provided with multiple crisscrossing auxiliary airway grooves (7), each of which is connected to the modeling airway to form an airway network.

6. The composite support structure contour vacuum suction cup according to claim 1, characterized in that: It also includes an auxiliary pressure plate (8); The upper surface of the vacuum suction cup base (1) is also provided with multiple threaded holes. One end of the auxiliary pressure plate (8) is fastened in the threaded hole by screws, and the bottom surface of the other end abuts against the upper surface of the product to be processed, so as to press the product to be processed.

7. The composite support structure contour vacuum suction cup according to claim 1, characterized in that: The sealing strip (6) is a foamed silicone strip.

8. The composite support structure contour vacuum suction cup according to claim 1, characterized in that: The sealing strip (6) has a circular cross-section. The height of the sealing strip (6) protruding from the upper end face of the air passage groove (2) is defined as h. The diameter of the cross-section of the sealing strip (6) is d, and its compression ratio is... Then there is ,and .

9. The composite support structure contour vacuum suction cup according to claim 1, characterized in that: Let A be the area of ​​the biomimetic adsorption region, then we have ; in, For the safety factor, its value is [value missing]. ; The cutting force exerted on the product during machining, in N; The working vacuum level of the vacuum system, in kPa; The air cavity leakage efficiency has a range of values. ; This represents the maximum outer contour area of ​​the product to be processed.

10. The composite support structure contouring vacuum suction cup according to claim 1, characterized in that: One end of the vacuum duct (3) is located in the central region of the upper surface of the vacuum suction cup substrate (1).

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