CNC suction cup

Abstract

The CNC suction cup comprises a base and a sealing assembly, the base is provided with a negative pressure chamber with one side open, an opening of the negative pressure chamber can be attached to the surface of a workpiece, and the sealing assembly is arranged along the opening and surrounds the negative pressure chamber. The sealing assembly can be matched with the workpiece to seal the opening after the base is attached to the workpiece so that the air pressure in the negative pressure chamber can be lower than the external air pressure, the sealing assembly comprises a first groove body and a first rubber ring, the first groove body is arranged along the opening and surrounds the negative pressure chamber, and the first rubber ring is installed at the bottom of the first groove body and surrounds the opening. Air leakage can be effectively reduced, the low-pressure state in the negative pressure chamber is maintained, the overall sealing effect is improved, and it is guaranteed that the workpiece fixing position is stable in the machining process.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology, and in particular to a CNC suction cup. Background Technology

[0002] In modern manufacturing, CNC (Computer Numerical Control) machining technology, with its advantages of high precision and high automation, has become a key means for many fields to achieve the production of precision parts.

[0003] In CNC machining, suction cups are often used to move workpieces. However, in actual machining processes, especially when there are slight bumps or unevenness on the surface of the workpiece, outside air can easily enter the space between the suction cup and the workpiece through gaps, resulting in a decrease in suction force and displacement or even detachment of the workpiece. Utility Model Content

[0004] In order to solve the technical problems existing in the background art, this utility model proposes a CNC suction cup.

[0005] The present invention proposes a CNC suction cup, comprising: a base and a sealing assembly. The base has a negative pressure chamber open on one side. The opening of the negative pressure chamber can be attached to the surface of the workpiece. The sealing assembly is arranged along the opening and surrounds the negative pressure chamber. After the base is attached to the workpiece, the sealing assembly can cooperate with the workpiece to close the opening so that the air pressure inside the negative pressure chamber is lower than the outside air pressure.

[0006] Preferably, the sealing assembly includes: a first groove and a first rubber ring, the first groove being arranged along the opening and surrounding the negative pressure chamber, and the first rubber ring being installed at the bottom of the first groove and arranged around the opening.

[0007] Preferably, the first rubber ring has a first annular end wall and a second annular end wall. The first annular end wall can be close to the surface of the workpiece, and the second annular end wall is installed on the first groove. The circumference of the first annular end wall is greater than the circumference of the second annular end wall.

[0008] Preferably, the sealing assembly further includes: a second groove and a second rubber ring, the second groove being arranged along the opening and surrounding the first groove, and the second rubber ring being installed at the bottom of the second groove and arranged around the opening.

[0009] Preferably, the second rubber ring has a third annular end wall and a fourth annular end wall. The third annular end wall can be close to the surface of the workpiece, and the fourth annular end wall is installed on the second groove. The circumference of the third annular end wall is greater than the circumference of the fourth annular end wall.

[0010] Preferably, the circumference of the third annular end wall is greater than the circumference of the first annular end wall, and the circumference of the fourth annular end wall is greater than the circumference of the second annular end wall.

[0011] Preferably, the first rubber ring has a first inner wall and a first outer wall, the second rubber ring has a second inner wall and a second outer wall, the first annular end wall, the first inner wall, the second annular end wall and the first outer wall are connected and integrally formed, the third annular end wall, the second inner wall, the fourth annular end wall and the second outer wall are connected and integrally formed, the base is close to the workpiece, the first rubber ring and the second rubber ring cooperate with the workpiece to close the opening, the first inner wall part is attached to the workpiece surface, the second inner wall part is attached to the workpiece surface, the first annular end wall and the first outer wall.

[0012] Preferably, the first rubber ring and the second rubber ring can be any one of silicone rubber, fluororubber, and nitrile rubber.

[0013] The CNC suction cup proposed in this utility model has the following advantages: it uses the air pressure difference between the negative pressure chamber and the outside to adsorb the workpiece, which can generate a uniform adsorption force on the entire surface of the workpiece, effectively avoiding the workpiece deformation caused by uneven force in traditional mechanical clamping, ensuring the stability of the workpiece's fixed position during processing, and guaranteeing processing accuracy. It adopts a multi-layer nested sealing structure, including a first groove, a first rubber ring, a second groove, and a second rubber ring. The various parts work together to effectively reduce air leakage and maintain a low pressure state inside the negative pressure chamber. Even if a small amount of leakage occurs in the first sealing layer, the second sealing layer can play a secondary sealing role, which greatly improves the overall sealing effect. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of a CNC suction cup proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of a CNC suction cup adsorbing a workpiece according to the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of the structure at point A. Detailed Implementation

[0017] refer to Figure 1-3 This utility model proposes a CNC suction cup, including: a base 1,

[0018] A negative pressure chamber 2 is provided on the base 1. When the base 1 is in contact with the workpiece surface, the opening 3 of the negative pressure chamber 2 and the workpiece surface form a relatively closed space. Air is extracted from the negative pressure chamber 2 by external equipment (such as a vacuum pump), causing its internal air pressure to be lower than the external air pressure. This creates a pressure difference between the negative pressure chamber 2 and the workpiece, which is used to firmly adhere the workpiece to the suction cup. This suction method based on the principle of negative pressure provides a stable and uniform suction force, ensuring that the workpiece remains in a fixed position during processing and avoiding any impact on processing accuracy due to displacement. A sealing assembly is arranged along the opening 3 and surrounds the negative pressure chamber 2. Its function is to work with the workpiece to seal the opening 3 after the base 1 is in contact with the workpiece, preventing outside air from entering the negative pressure chamber 2 and maintaining a low-pressure state inside. Specifically, the various parts of the sealing assembly work together to achieve a good sealing effect.

[0019] The first part of the sealing assembly includes a first groove 40 and a first rubber ring 41. The first groove 40 is arranged along the opening 3 and surrounds the negative pressure chamber 2, providing a mounting base for the first rubber ring 41. The first rubber ring 41 is installed at the bottom of the first groove 40 and arranged around the opening 3. The first rubber ring 41 has a unique structure, with its first annular end wall 42 close to the workpiece surface and its second annular end wall 43 installed on the first groove 40. The circumference of the first annular end wall 42 is greater than the circumference of the second annular end wall 43. This design allows the first rubber ring 41 to deform under pressure, better fit the workpiece surface, and improve the sealing performance.

[0020] The special structure of the first rubber ring 41 increases the contact area with the workpiece surface, and due to its circumference difference design, it can generate a certain elastic deformation during the adsorption process, effectively filling the small unevenness that may exist on the workpiece surface, thereby improving the sealing effect and reducing the possibility of air leakage. In addition, the support and fixing effect of the first groove 40 on the first rubber ring 41 ensures the stability and reliability of the first rubber ring 41 during long-term use.

[0021] The sealing assembly also includes a second groove 50 and a second rubber ring 51. The second groove 50 is arranged along the opening 3 and surrounds the first groove 40, further enhancing the overall sealing performance of the sealing assembly. The second rubber ring 51 is installed at the bottom of the second groove 50 and arranged around the opening 3. The second rubber ring 51 has a third annular end wall 52 and a fourth annular end wall 53. The third annular end wall 52 can be close to the surface of the workpiece, and the fourth annular end wall 53 is installed on the second groove 50. Similarly, the circumference of the third annular end wall 52 is greater than the circumference of the fourth annular end wall 53. Moreover, the circumference of the third annular end wall 52 is greater than the circumference of the first annular end wall 42, and the circumference of the fourth annular end wall 53 is greater than the circumference of the second annular end wall 43. This layered and gradually increasing size design makes the sealing assembly form a multi-layered sealing structure at different positions.

[0022] The size difference and structural fit between the second rubber ring 51 and the first rubber ring 41 enable the two rubber rings to work together to adapt to the shape of the workpiece surface during the adsorption process, thereby further improving the sealing effect. In addition, the second groove 50 provides support and protection for the second rubber ring 51, which is similar to the function of the first groove 40 for the first rubber ring 41, ensuring the stability and reliability of the second rubber ring 51 during long-term use.

[0023] The first rubber ring 41 has a first inner wall 44 and a first outer wall 45, and the second rubber ring 51 has a second inner wall 54. The first annular end wall 42, the first inner wall 44, the second annular end wall 43 and the first outer wall 45 are connected and integrally formed. The third annular end wall 52, the second inner wall 54, the fourth annular end wall 53 and the second outer wall are connected and integrally formed. When the base 1 is close to the workpiece, and the first rubber ring 41 and the second rubber ring 51 cooperate with the workpiece to close the opening 3, the first inner wall 44 is partially attached to the surface of the workpiece, the second inner wall 54 is partially attached to the surface of the workpiece, the first annular end wall 42 and the first outer wall 45, and the second rubber ring 51 is pressed on the first rubber ring 41. This bonding method makes a tight contact between the rubber rings and between the rubber rings and the surface of the workpiece, which further enhances the sealing effect.

[0024] The mutual adhesion between the rubber rings and their close contact with the workpiece surface effectively reduce the channels for air leakage. Through this multi-part, multi-layer adhesion method, even when there is a certain degree of unevenness on the workpiece surface, the sealing component can achieve a good sealing effect through the elastic deformation and mutual cooperation of the rubber rings. This design improves the adaptability of the suction cup to workpieces of different shapes and surface qualities, and broadens its application range.

[0025] The first rubber ring 41 and the second rubber ring 51 can be made of any one of silicone rubber, fluororubber, or nitrile rubber. These materials have their own unique performance characteristics and are suitable for different processing environments and workpiece materials. Silicone rubber has excellent high and low temperature resistance and can maintain good elasticity and sealing performance in a temperature range of -50℃ to 200℃. Fluororubber can resist the corrosion of most chemicals, such as strong acids, strong alkalis, and organic solvents. Nitrile rubber has good oil resistance and good resistance to various mineral oils, vegetable oils, and animal oils. At the same time, nitrile rubber also has certain wear resistance and good elasticity.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A CNC suction cup, characterized in that, include: The base (1) and the sealing assembly have a negative pressure chamber (2) with one side open. The opening (3) of the negative pressure chamber (2) can be attached to the surface of the workpiece. The sealing assembly is arranged along the opening (3) and surrounds the negative pressure chamber (2). After the base (1) is attached to the workpiece, the sealing assembly can cooperate with the workpiece to close the opening (3) so that the air pressure inside the negative pressure chamber (2) is lower than the outside air pressure.

2. A CNC suction cup according to claim 1, characterized in that, The sealing assembly includes a first groove (40) and a first rubber ring (41). The first groove (40) is arranged along the opening (3) and surrounds the negative pressure chamber (2). The first rubber ring (41) is installed at the bottom of the first groove (40) and arranged around the opening (3).

3. A CNC suction cup according to claim 2, characterized in that, The first rubber ring (41) has a first annular end wall (42) and a second annular end wall (43). The first annular end wall (42) can be close to the surface of the workpiece, and the second annular end wall (43) is installed on the first groove (40). The circumference of the first annular end wall (42) is greater than the circumference of the second annular end wall (43).

4. A CNC suction cup according to claim 2, characterized in that, The sealing assembly also includes a second groove (50) and a second rubber ring (51), the second groove (50) being arranged along the opening (3) and surrounding the first groove (40), and the second rubber ring (51) being installed at the bottom of the second groove (50) and arranged around the opening (3).

5. A CNC suction cup according to claim 4, characterized in that, The second rubber ring (51) has a third annular end wall (52) and a fourth annular end wall (53). The third annular end wall (52) can be close to the surface of the workpiece, and the fourth annular end wall (53) is installed on the second groove (50). The circumference of the third annular end wall (52) is greater than the circumference of the fourth annular end wall (53).

6. A CNC suction cup according to claim 5, characterized in that, The circumference of the third annular end wall (52) is greater than that of the first annular end wall (42), and the circumference of the fourth annular end wall (53) is greater than that of the second annular end wall (43).

7. A CNC suction cup according to claim 5, characterized in that, The first rubber ring (41) has a first inner wall (44) and a first outer wall (45), and the second rubber ring (51) has a second inner wall (54) and a second outer wall. The first annular end wall (42), the first inner wall (44), the second annular end wall (43) and the first outer wall (45) are connected and integrally formed. The third annular end wall (52), the second inner wall (54), the fourth annular end wall (53) and the second outer wall are connected and integrally formed. The base (1) is close to the workpiece. After the first rubber ring (41) and the second rubber ring (51) cooperate with the workpiece to close the opening (3), the first inner wall (44) partly abuts the surface of the workpiece, the second inner wall (54) partly abuts the surface of the workpiece, the first annular end wall (42) and the first outer wall (45).

8. A CNC suction cup according to claim 4, characterized in that, The first rubber ring (41) and the second rubber ring (51) can be made of any one of silicone rubber, fluororubber, or nitrile rubber.

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