Novel silicone CNC chuck one-way valve

Abstract

The utility model discloses a novel silica gel CNC chuck unidirectional valve, including unidirectional valve casing, unidirectional valve casing is metal material, its inside is equipped with the through upper through -hole, middle cavity and lower through -hole, upper through -hole communicates work piece, lower through -hole communicates vacuum generator, and the unidirectional valve diaphragm is installed in middle cavity, and the unidirectional valve diaphragm is silica gel material, and realizes one -way airflow control through the elastic deformation, and through using diaphragm formula structure, and with silica gel diaphragm replaces traditional spring + valve core structure, can realize the function of unidirectional valve on the function, can effectively avoid the influence of cutting fluid, machining residual in traditional spring + valve core structure simultaneously, guarantees the normal operation of unidirectional valve, keeps the stability of vacuum degree when chuck adsorbs work piece and the precision required in processing, and in the production and manufacturing aspect of unidirectional valve, the batch processing of unidirectional valve diaphragm is faster, and the cost is also lower than spring formula unidirectional valve, can effectively save production cost, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, and in particular to a novel silicone CNC suction cup one-way valve. Background Technology

[0002] The existing CNC machining process uses a spring + valve core structure. CNC machining often requires the use of cutting fluid, and machining residue is generated during the machining process. Cutting fluid and machining residue will enter the check valve. In this environment, the spring in the check valve will be corroded by the cutting fluid, and the machining residue will adhere to the spring. Over time, the spring will fail, causing damage to the check valve inside the chuck. This will cause the vacuum degree when the chuck picks up the workpiece to gradually decrease, and the workpiece cannot be properly fixed, thus affecting the machining accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a novel silicone CNC chuck one-way valve to solve the problem mentioned in the background art that the traditional spring + valve core structure is easily affected by cutting fluid and residue, causing damage to the one-way valve inside the chuck, resulting in a gradual decrease in the vacuum degree when the chuck adsorbs the workpiece, and the workpiece cannot be properly fixed, thus affecting the machining accuracy.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel silicone CNC suction cup one-way valve, comprising a one-way valve housing, the one-way valve housing being made of metal, having a through upper through hole, a middle cavity, and a lower through hole inside, the upper through hole connecting to the workpiece, the lower through hole connecting to a vacuum generator, and a one-way valve diaphragm installed in the middle cavity, the one-way valve diaphragm being made of silicone, achieving one-way airflow control through elastic deformation.

[0005] Preferably, an annular groove is formed on the inner wall of the one-way valve housing, and the edge of the one-way valve diaphragm is embedded in the annular groove.

[0006] Preferably, a spiral guide groove is provided at the inlet of the lower through hole.

[0007] Preferably, a removable filter layer is provided at the bottom of the intermediate cavity.

[0008] Preferably, the surface of the one-way valve diaphragm is coated with a polytetrafluoroethylene film layer.

[0009] Preferably, an annular sealing groove is provided on the outer wall of the one-way valve housing, and a sealing ring is adapted to fit inside the annular sealing groove.

[0010] Preferably, the one-way valve diaphragm can be designed with different structures for different installation methods.

[0011] The beneficial effects of this utility model are:

[0012] This invention utilizes a diaphragm structure, replacing the traditional spring + valve core structure with a silicone diaphragm, to achieve the function of a one-way valve. Simultaneously, it effectively avoids the influence of cutting fluid and machining debris in the traditional spring + valve core structure, ensuring the normal operation of the one-way valve, maintaining the stability of the vacuum level when the suction cup adsorbs the workpiece, and meeting the required machining precision. Furthermore, in terms of manufacturing, the one-way valve diaphragm allows for faster batch processing and is less expensive than the spring-type one-way valve, effectively saving production costs and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the novel silicone CNC suction cup one-way valve proposed in this utility model;

[0014] Figure 2 This is a front cross-sectional view of the novel silicone CNC suction cup check valve proposed in this utility model.

[0015] Figure 3 This is a top view cross-sectional diagram of the novel silicone CNC suction cup one-way valve proposed in this utility model.

[0016] In the diagram: 1. One-way valve housing; 2. Upper through hole; 3. Middle cavity; 4. Lower through hole; 5. One-way valve diaphragm; 6. Annular groove; 7. Spiral guide groove; 8. Filter layer; 9. Annular sealing groove; 10. Sealing ring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-3 A novel silicone CNC suction cup one-way valve includes a one-way valve housing 1, which is made of metal and has a through upper hole 2, a middle cavity 3 and a lower hole 4 inside. The upper hole 2 is connected to the workpiece and the lower hole 4 is connected to the vacuum generator. A one-way valve diaphragm 5 is installed in the middle cavity 3. The one-way valve diaphragm 5 is made of silicone and achieves one-way airflow control through elastic deformation.

[0019] The one-way valve operates in four states: natural state, non-adsorbed workpiece state, adsorbed workpiece state, and backflush state.

[0020] In its natural state: the one-way valve diaphragm 5 is in the middle position and is not in contact with the upper through hole 2 or the lower through hole 4. At this time, the pressure difference on both sides of the one-way valve diaphragm 5 is zero.

[0021] Unadsorbed workpiece state: When a large amount of gas flows in from the upper through hole 2, it flows through the middle cavity 3 and towards the lower through hole 4. At this time, due to the pressure difference on both sides of the one-way valve diaphragm 5, the pressure at the upper through hole 2 is greater than the pressure at the lower through hole 4. Since the one-way valve diaphragm 5 is made of silicone, it has a large elastic deformation capacity. Under the above pressure, the one-way valve diaphragm 5 adheres to the wall of the lower through hole 4, thereby keeping the one-way valve in the closed state.

[0022] Adsorption of workpiece: Gas flows in from the upper through hole 2, passes through the middle cavity 3 and flows to the lower through hole 4. Since the upper through hole 2 is connected to the workpiece, the workpiece is blocking the flow. The cavity between the upper through hole 2 and the one-way valve diaphragm 5 is small, and the gas flow is small. It is not enough to make the one-way valve diaphragm 5 adhere to the lower through hole 4, so that the one-way valve is in the open state. The vacuum degree of the upper through hole 2 and the lower through hole 4 is the same, thus completing the adsorption of the workpiece.

[0023] Backflush state: Gas flows in from the lower through hole 4, passes through the one-way valve diaphragm 5, and flows to the upper through hole 2, causing the upper through hole 2 of the workpiece to desorb. The gas passes through the middle cavity 3 quickly, completing the backflush action and enabling the workpiece to be removed.

[0024] This invention utilizes a diaphragm structure, replacing the traditional spring + valve core structure with a silicone diaphragm, to achieve the function of a one-way valve. Simultaneously, it effectively avoids the influence of cutting fluid and machining residue in the traditional spring + valve core structure, ensuring the normal operation of the one-way valve, maintaining the stability of the vacuum level when the suction cup adsorbs the workpiece, and meeting the required machining precision. Furthermore, in terms of manufacturing, the one-way valve diaphragm 5 allows for faster batch processing and is less expensive than spring-type one-way valves, effectively saving production costs and improving production efficiency.

[0025] Specifically, in this embodiment, an annular groove 6 is provided on the inner wall of the one-way valve housing 1, and the edge of the one-way valve diaphragm 5 is embedded in the annular groove 6, so that the one-way valve diaphragm 5 can be stably connected in the annular groove 6 by the expansion characteristics of silicone, thereby realizing the locking between the one-way valve diaphragm 5 and the one-way valve housing 1, thereby improving the connection stability of the one-way valve diaphragm 5 on the one-way valve housing 1.

[0026] Specifically, in this embodiment, a spiral guide groove 7 is provided at the inlet of the lower through hole 4. When the residue generated during processing accumulates at the inlet of the lower through hole 4, the centrifugal force can be used to separate the residue through the cooperation of the spiral guide groove 7 and the backflush state of the one-way valve.

[0027] Specifically, in this embodiment, a removable filter layer 8 is provided at the bottom of the intermediate cavity 3 as a supplement to the spiral guide channel 7. The filter layer 8 can capture fine particles that the spiral guide channel 7 fails to separate, preventing fine particles from entering the vacuum generator or adhering to the diaphragm surface, thereby reducing the risk of wear on the precision components of the vacuum generator by residues and extending the life of the vacuum system.

[0028] Specifically, in this embodiment, the surface of the one-way valve diaphragm 5 is coated with a polytetrafluoroethylene (PTFE) film layer. Through the corrosion-resistant properties of the PTFE film, the one-way valve diaphragm 5 can be effectively protected when it is in long-term contact with cutting fluid, thereby further extending the service life of the one-way valve diaphragm 5.

[0029] Specifically, in this embodiment, an annular sealing groove 9 is provided on the outer wall of the one-way valve housing 1, and a sealing ring 10 is adapted in the annular sealing groove 9. The sealing ring 10 in the annular sealing groove 9 is deformed under pressure when the one-way valve housing 1 is assembled with the suction cup base, which can fill the tiny gaps, thereby preventing gas leakage and ensuring that the adsorption force is in a stable state.

[0030] Specifically, in this embodiment, the one-way valve diaphragm 5 can be designed with different structures for different installation methods.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A novel silicone CNC suction cup one-way valve, comprising a one-way valve housing (1), characterized in that: The one-way valve housing (1) is made of metal and has a through upper hole (2), a middle cavity (3) and a lower hole (4) inside. The upper hole (2) is connected to the workpiece and the lower hole (4) is connected to the vacuum generator. A one-way valve diaphragm (5) is installed in the middle cavity (3). The one-way valve diaphragm (5) is made of silicone and achieves one-way airflow control through elastic deformation.

2. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: The inner wall of the one-way valve housing (1) is provided with an annular groove (6), and the edge of the one-way valve diaphragm (5) is embedded in the annular groove (6).

3. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: A spiral guide groove (7) is provided at the entrance of the lower through hole (4).

4. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: A removable filter layer (8) is provided at the bottom of the intermediate cavity (3).

5. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: The surface of the one-way valve diaphragm (5) is coated with a polytetrafluoroethylene film layer.

6. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: An annular sealing groove (9) is provided on the outer wall of the one-way valve housing (1), and a sealing ring (10) is adapted to be installed in the annular sealing groove (9).

7. The novel silicone CNC suction cup check valve according to claim 1, characterized in that: The one-way valve diaphragm (5) can be designed with different structures for different installation methods.

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