Valve plate adsorption tool

Abstract

The utility model discloses a valve plate adsorption tool, which belongs to the technical field of valve plate processing and comprises a sucker, a main gas circuit is arranged in the sucker, one end of the main gas circuit is connected with a negative pressure device, one end of the main gas circuit far away from the negative pressure device is connected with a circular truncated cone cavity, and the small-diameter end of the circular truncated cone cavity is connected with the main gas circuit. The large-diameter end of the circular truncated cone cavity is connected with an adsorption ring, the end, away from the circular truncated cone cavity, of the adsorption ring extends out of the suction cup, the end, extending out of the suction cup, of the adsorption ring adsorbs the valve plate, and a balance cavity is formed in the center of the adsorption ring and communicates with the circular truncated cone cavity. By means of the gradually-expanded section design of the circular truncated cone cavity, smooth diffusion of airflow is achieved, turbulent flow and vortex caused by sudden change of the section are avoided, local pressure loss is remarkably reduced, the balance cavity serves as a closed air capacitor, airflow sudden change energy at the moment of adsorption is absorbed, pressure oscillation is restrained, dynamic stability is improved, and high-precision positioning is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of valve plate processing technology, and in particular relates to a valve plate adsorption fixture. Background Technology

[0002] In precision manufacturing, semiconductor packaging, and optical component assembly, the gripping, handling, and positioning of valve plates place stringent demands on the performance of adsorption tooling. Traditional vacuum adsorption devices often employ a single gas path directly connected to the adsorption port, which presents the following technical bottlenecks:

[0003] Uneven adsorption force: A single gas path can easily lead to a significant pressure gradient between the edge and the center area. Especially when adsorbing large-sized or flexible valve plates, insufficient local negative pressure can easily cause them to fall off or warp.

[0004] Poor airflow stability: Sudden changes in airflow during adsorption can easily cause pressure oscillations, affecting positioning accuracy. Furthermore, an unreasonable adsorption port layout can lead to turbulence interference and reduce energy efficiency.

[0005] Therefore, there is an urgent need to design a valve plate adsorption fixture to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a valve plate adsorption fixture that has the advantages of uniform and stable adsorption negative pressure, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the specific technical solution of the valve plate adsorption fixture of this utility model is as follows:

[0008] A valve plate adsorption fixture includes a suction cup with a main air passage inside. One end of the main air passage is connected to a negative pressure device, and the end of the main air passage away from the negative pressure device is connected to a frustum cavity. The small diameter end of the frustum cavity is connected to the main air passage, and the large diameter end of the frustum cavity is connected to an adsorption ring. The end of the adsorption ring away from the frustum cavity extends beyond the suction cup, and the end of the adsorption ring extending beyond the suction cup adsorbs the valve plate. A balance chamber is provided at the center of the adsorption ring, and the balance chamber is connected to the frustum cavity.

[0009] Furthermore, the frustum cavity includes a first plane, a second plane, and a side surface. The first plane is located at the small diameter end of the frustum cavity, and the second plane is located at the large diameter end of the frustum cavity. The first plane and the second plane are respectively connected to the two ends of the side surface. The first plane is connected to the main gas path, and the second plane is connected to the adsorption ring and the balance chamber.

[0010] Furthermore, there are two adsorption rings, and the centers of the two adsorption rings are located at the same position.

[0011] Furthermore, a first sealing ring is connected between the two adsorption rings, dividing the two adsorption rings into two independent negative pressure chambers.

[0012] Furthermore, the adsorption ring includes multiple adsorption holes, which are arranged in an array at the same angle. One end of the adsorption hole is connected to the frustum cavity, and the other end of the adsorption hole extends beyond the suction cup.

[0013] Furthermore, the suction cup includes a first disc body and a second disc body, which are detachably connected. The main air passage and the frustum cavity are located on the first disc body, while the adsorption ring and the balance cavity are located on the second disc body.

[0014] Furthermore, a groove is provided on the first disc body, and a protrusion is fixedly connected to the second disc body. When the first disc body and the second disc body are connected, the protrusion is connected to the groove.

[0015] Furthermore, a second sealing ring is connected to the first disc body and / or the second disc body. When the first disc body and the second disc body are connected, the sealing performance of the suction cup is ensured by the second sealing ring.

[0016] Furthermore, an annular groove is provided on the second disc, and the valve plate is located in the annular groove when it is adsorbed.

[0017] Furthermore, the first and second discs are provided with through holes, through which bolts are passed and then secured with nuts.

[0018] This invention has the following advantages: the gradually expanding cross-section design of the frustum cavity enables smooth airflow diffusion, avoids turbulence and eddies caused by abrupt changes in cross-section, significantly reduces local pressure loss, and the balance cavity, as a closed gas container, absorbs the energy of the instantaneous airflow change during adsorption, suppresses pressure oscillation, improves dynamic stability, and ensures high-precision positioning. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the adsorption tool of this utility model;

[0020] Figure 2 This is a bottom view of the structure of the adsorption tool of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the second disc body of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the first disc body of this utility model;

[0023] The markings in the diagram are as follows: 1. First disc; 11. Main air passage; 12. Frustum cavity; 121. First plane; 122. Second plane; 123. Side; 13. Groove; 14. Second sealing ring; 2. Second disc; 21. Adsorption ring; 211. Adsorption hole; 22. Balance chamber; 23. Protrusion; 25. First sealing ring; 3. Through hole; 4. Valve plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0026] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a valve plate adsorption fixture.

[0027] Existing vacuum adsorption devices often employ a single gas path directly connected to the adsorption port design, which presents the following technical bottlenecks:

[0028] Uneven adsorption force: A single gas path can easily lead to a significant pressure gradient between the edge and the center area. Especially when adsorbing large-sized or flexible valve plates, insufficient local negative pressure can easily cause them to fall off or warp.

[0029] Poor airflow stability: Sudden changes in airflow during adsorption can easily cause pressure oscillations, affecting positioning accuracy. Furthermore, an unreasonable adsorption port layout can lead to turbulence interference and reduce energy efficiency.

[0030] Therefore, this valve plate adsorption fixture includes a suction cup, a main air passage 11 is provided in the suction cup, one end of the main air passage 11 is connected to a negative pressure device, the end of the main air passage 11 away from the negative pressure device is connected to a frustum cavity 12, the small diameter end of the frustum cavity 12 is connected to the main air passage 11, the large diameter end of the frustum cavity 12 is connected to an adsorption ring 21, the end of the adsorption ring 21 away from the frustum cavity 12 extends outside the suction cup, the end of the adsorption ring 21 extending outside the suction cup adsorbs the valve plate 4, and a balance cavity 22 is provided at the center of the adsorption ring 21, which is connected to the frustum cavity 12.

[0031] Specifically, a connector is connected to the main air passage 11, and the main air passage 11 is connected to the negative pressure device through the connector.

[0032] By designing the frustum-shaped cavity 12, a gradual change in cross-section is achieved, optimizing airflow distribution. The gradually expanding structure of the frustum-shaped cavity 12 smoothly enlarges the airflow channel, avoiding eddies and turbulence caused by abrupt changes in cross-section, significantly reducing local pressure loss. Simultaneously, by gradually increasing the cross-sectional area, the airflow velocity decreases smoothly, resulting in more uniform static pressure recovery and ensuring a more stable negative pressure distribution at the adsorption ring 21, avoiding insufficient or fluctuating local adsorption force. Furthermore, the larger diameter end of the frustum-shaped structure provides more space, facilitating the arrangement of multiple adsorption ports. The gradually expanding geometry combined with a symmetrical design allows for a uniform distribution of negative pressure in the main air path 11 to each adsorption port, avoiding uneven adsorption force due to path differences. If a rectangular or cylindrical shape were used, the pressure at the edge adsorption ports might significantly decrease due to their distance from the main air path 11. The frustum-shaped layout optimizes the pressure transmission path through spatial gradient. The increased cross-sectional area of ​​the large-diameter end of the frustum cavity 12 reduces the overall flow velocity, but through the diversion of multiple adsorption ports, each adsorption port can still maintain a high local flow velocity, thereby forming a stronger local negative pressure gradient on the surface of the valve plate 4 and improving adsorption reliability.

[0033] By setting the adsorption ring 21, the negative pressure can be evenly distributed throughout the adsorption area, which conforms to the geometric characteristics of the valve plate 4, which is also annular.

[0034] The increased cross-sectional area at the large-diameter end of the balance chamber 22 leads to a decrease in flow velocity. However, if the airflow diffusion is uneven, it may form a local low-pressure or turbulent zone. Therefore, a closed balance chamber 22 is provided to buffer pressure fluctuations through its volume, so that the negative pressure can be transmitted to the adsorption ring 21 more evenly. At the same time, when the flow velocity decreases, the static pressure recovers, but the boundary layer separation during the diffusion process may induce eddies. The balance chamber 22 can absorb some kinetic energy, reduce eddy generation, and improve the overall static pressure stability. In addition, the adsorption ring 21 may form an airflow stagnation zone in the middle of the large-diameter end. The balance chamber 22 forces the airflow to diffuse towards the central area through local connection, breaking the dead zone and ensuring the uniformity of negative pressure distribution throughout the adsorption ring 21. At the same time, when the suction cup adsorbs the valve plate 4, the sudden change in the flow rate of the main gas path 11 may cause pressure oscillation. The balance chamber 22, as a "gas container", slows down the rate of pressure change by storing and releasing gas, thereby improving the dynamic stability of the system.

[0035] Preferably, the center line of the balancing cavity 22 and the center line of the frustum cavity 12 are on the same straight line.

[0036] Specifically, the frustum cavity 12 includes a first plane 121, a second plane 122, and a side surface 123. The first plane 121 is located at the small diameter end of the frustum cavity 12, and the second plane 122 is located at the large diameter end of the frustum cavity 12. The first plane 121 and the second plane 122 are respectively connected to the two ends of the side surface 123. The first plane 121 is connected to the main air passage 11, and the second plane 122 is connected to the adsorption ring 21 and the balance chamber 22. Thus, the area of ​​the first plane 121 is smaller than the area of ​​the second plane 122.

[0037] Furthermore, there are two adsorption rings 21, with the centers of the two adsorption rings 21 located at the same position. By setting two adsorption rings 21, a larger adsorption area can be covered, while avoiding the "central collapse" problem caused by insufficient negative pressure in the central area of ​​a single annular adsorption port. Moreover, the negative pressure intensity of the two adsorption rings 21 can be adjusted independently. For example, the outer adsorption ring 21 is used to quickly adsorb and fix the edge of the valve plate 4, while the inner adsorption ring 21 provides auxiliary adsorption to balance the pressure in the central area.

[0038] Specifically, a first sealing ring 25 is connected between the two adsorption rings 21, making the two adsorption rings 21 into two independent negative pressure cavities. If there is local unevenness on the surface of the valve plate 4, the sealing ring can prevent the negative pressure of the inner adsorption ring 21 and the outer adsorption ring 21 from leaking to each other, ensuring that the negative pressure in the non-contact area remains stable. In addition, the first sealing ring 25 is made of flexible materials such as silicone or rubber, which can undergo elastic deformation when the surface of the valve plate 4 is slightly uneven, filling the tiny gaps and reducing air leakage.

[0039] The adsorption ring 21 includes a plurality of adsorption holes 211, which are arranged in an array at the same angle. One end of the adsorption hole 211 is connected to the frustum cavity 12, and the other end of the adsorption hole 211 away from the frustum cavity 12 extends beyond the suction cup.

[0040] The suction cup includes a first disc body 1 and a second disc body 2, which are detachably connected. The main air passage 11 and the frustum cavity 12 are opened on the first disc body 1, and the adsorption ring 21 and the balance cavity 22 are located on the second disc body 2.

[0041] The first disc 1 has a groove 13, and the second disc 2 has a protrusion 23 fixedly connected to it. When the first disc 1 and the second disc 2 are connected, the protrusion 23 is connected to the groove 13. By setting the protrusion 23 and the groove 13, the protrusion 23 and the groove 13 are aligned before the first disc 1 and the second disc 2 are connected, ensuring that the first disc 1 and the second disc 2 are on the same center line when connected. Then, the first disc 1 or the second disc 2 is rotated until the through holes 3 of the first disc 1 and the second disc 2 coincide. Then, the bolt is passed through the through holes 3 on the first disc 1 and the second disc 2 and fixed with a nut.

[0042] A second sealing ring 14 is connected to the first disc 1 and / or the second disc 2. When the first disc 1 and the second disc 2 are connected, the second sealing ring 14 ensures the sealing of the suction cup. Specifically, the second sealing ring 14 can be provided on both the first disc 1 and the second disc 2, or either disc can be chosen to provide the sealing ring. This utility model does not limit this.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A valve plate adsorption fixture, characterized in that, Includes a suction cup, in which a main air passage (11) is provided. One end of the main air passage (11) is connected to a negative pressure device. The end of the main air passage (11) away from the negative pressure device is connected to a frustum cavity (12). The small diameter end of the frustum cavity (12) is connected to the main air passage (11). The large diameter end of the frustum cavity (12) is connected to an adsorption ring (21). The end of the adsorption ring (21) away from the frustum cavity (12) extends outside the suction cup. The end of the adsorption ring (21) extending outside the suction cup adsorbs the valve plate (4). A balance chamber (22) is provided at the center of the adsorption ring (21). The balance chamber (22) is connected to the frustum cavity (12).

2. The valve plate adsorption fixture according to claim 1, characterized in that, The frustum cavity (12) includes a first plane (121), a second plane (122), and a side surface (123). The first plane (121) is located at the small diameter end of the frustum cavity (12), and the second plane (122) is located at the large diameter end of the frustum cavity (12). The first plane (121) and the second plane (122) are respectively connected to the two ends of the side surface (123). The first plane (121) is connected to the main gas path (11), and the second plane (122) is connected to the adsorption ring (21) and the balance chamber (22).

3. The valve plate adsorption fixture according to claim 1, characterized in that, The specific number of the adsorption rings (21) is two, and the centers of the two adsorption rings (21) are located at the same position.

4. The valve plate adsorption fixture according to claim 3, characterized in that, A first sealing ring (25) is connected between the two adsorption rings (21), so that the two adsorption rings (21) are divided into two independent negative pressure cavities.

5. The valve plate adsorption fixture according to claim 1, characterized in that, The adsorption ring (21) includes a plurality of adsorption holes (211), which are arranged in an array at the same angle. One end of the adsorption hole (211) is connected to the frustum cavity (12), and the other end of the adsorption hole (211) away from the frustum cavity (12) extends out of the suction cup.

6. The valve plate adsorption fixture according to claim 1, characterized in that, The suction cup includes a first disc body (1) and a second disc body (2), which are detachably connected. The main air passage (11) and the frustum cavity (12) are located on the first disc body (1), and the adsorption ring (21) and the balance cavity (22) are located on the second disc body (2).

7. The valve plate adsorption fixture according to claim 6, characterized in that, The first disc body (1) has a groove (13) and the second disc body (2) has a protrusion (23) fixedly connected to it. When the first disc body (1) and the second disc body (2) are connected, the protrusion (23) is connected to the groove (13).

8. The valve plate adsorption fixture according to claim 6, characterized in that, A second sealing ring (14) is connected to the first disc body (1) and / or the second disc body (2). When the first disc body (1) and the second disc body (2) are connected, the sealing of the suction cup is ensured by the second sealing ring (14).

9. The valve plate adsorption fixture according to claim 6, characterized in that, The second disc (2) has an annular groove, and when the valve plate (4) is adsorbed, the valve plate (4) is located in the annular groove.

10. The valve plate adsorption fixture according to claim 7, characterized in that, The first disc (1) and the second disc (2) are provided with through holes (3). The bolts are passed through the through holes (3) on the first disc (1) and the second disc (2) and then fixed with nuts.

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