Diaphragm processing fixture

Abstract

The present application relates to a diaphragm processing clamp, comprising a clamp block, the clamp block is equipped with a bearing part for bearing a diaphragm and a vacuum extraction channel for vacuum extraction operation on the bearing part to make the diaphragm adhere to the bearing part. The present application can well fix the diaphragm without causing the diaphragm to deform, and then high-precision machining operation can be carried out on the diaphragm.

Description

Technical Field

[0001] This invention relates to the field of fixtures, and more specifically to a diaphragm processing fixture. Background Technology

[0002] Diaphragms used in valve bodies such as pressure regulating valves need to be relatively thin and have a consistent thickness. When high precision is required, existing injection molding or compression molding processes are difficult to meet the requirements. Machining methods such as turning can meet high precision requirements, but considering that diaphragms have a certain degree of flexibility and are relatively soft, existing fixtures are prone to deforming the diaphragms during clamping and positioning, making it impossible to perform high-precision machining operations. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a diaphragm processing fixture that can fix the diaphragm well without causing the diaphragm to deform, thereby enabling high-precision machining operations on the diaphragm.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a diaphragm processing fixture, including a fixture block, wherein the fixture block is provided with a support portion for carrying a diaphragm and a vacuuming channel for performing a vacuuming operation on the support portion so that the diaphragm adheres to the support portion.

[0005] Furthermore, the support portion has a bottom attachment area for attaching the bottom of the diaphragm, and the vacuum channel extends axially through the center of the bottom attachment area.

[0006] Furthermore, the support portion also has an annular groove for the peripheral wall of the diaphragm to extend into, and the bottom attachment area is located within the area enclosed by the inner circle of the annular groove.

[0007] Furthermore, in order to better fix the membrane, the bottom attachment area is provided with a vacuum adsorption groove that connects to the vacuum channel.

[0008] Furthermore, the vacuum adsorption tank consists of several strip-shaped grooves that are evenly distributed circumferentially along the vacuum channel and extend radially along the bottom attachment area.

[0009] Furthermore, to prevent the diaphragm from being misaligned, the end of the vacuum channel near the support portion is shaped to match the central protrusion of the diaphragm, so as to also be used to position the central protrusion, which does not interfere with the communication between the vacuum adsorption tank and the vacuum channel.

[0010] Furthermore, the diaphragm processing fixture also includes a vacuum pumping mechanism and a vacuum pumping tube, wherein the vacuum pumping mechanism is connected to the vacuum pumping channel through the vacuum pumping tube.

[0011] Furthermore, the membrane is made of PFA or PTFE.

[0012] After adopting the above technical solution, a vacuuming operation is performed on the vacuum channel to attach the diaphragm to the support part. This allows the diaphragm to be well fixed without causing deformation, so that the diaphragm can be machined, thereby improving the diaphragm's precision. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the fixture block of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the clamp block fixing the diaphragm according to the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the diaphragm of the present invention;

[0016] Figure 4 This is a schematic diagram of the diaphragm processing fixture of the present invention;

[0017] In the figure, 1 is the clamp block; 2 is the diaphragm; 21 is the bottom; 22 is the peripheral wall; 23 is the central protrusion; 3 is the bearing part; 31 is the bottom attachment area; 32 is the annular groove; 4 is the vacuum channel; 5 is the vacuum mechanism; 6 is the vacuum tube; and 7 is the vacuum adsorption tank. Detailed Implementation

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] like Figure 1 , 2 As shown in Figures 3 and 4, a diaphragm processing fixture includes a fixture block 1. The fixture block 1 is provided with a support portion 3 for carrying a diaphragm 2 and a vacuum channel 4 for performing a vacuuming operation on the support portion 3 so that the diaphragm 2 adheres to the support portion 3.

[0020] It should be noted that the material of diaphragm 2 can be PFA or PTFE. Of course, the material of diaphragm 2 is not limited to these and can also be other flexible materials. When PFA material is used, it is first injection molded, and then fixed with the diaphragm processing fixture in this embodiment for machining. When PTFE material is used, it is first compression molded and sintered, and then fixed with the diaphragm processing fixture in this embodiment for machining.

[0021] Specifically, a vacuuming operation is performed on the vacuum channel 4 to attach the diaphragm 2 to the support part 3, thereby fixing the diaphragm 2 well without causing deformation, so that the diaphragm 2 can be machined and the precision of the diaphragm 2 can be improved.

[0022] In one embodiment, such as Figure 1 , 2 As shown in Figures 4 and 5, the support portion 3 has a bottom attachment area 31 for attaching the bottom 21 of the diaphragm 2, and the vacuum channel 4 passes through the center of the bottom attachment area 31 along the axial direction.

[0023] In one embodiment, such as Figure 1 , 2 As shown in Figures 4 and 5, the support portion 3 also has an annular groove 32 for the peripheral wall 22 of the diaphragm 2 to extend into, and the bottom attachment area 31 is located in the area enclosed by the inner circle of the annular groove 32.

[0024] The annular groove 32 can position the peripheral wall 22 of the diaphragm 2, thereby preventing the peripheral wall 22 from being stretched and deformed during the vacuum adsorption process, and avoiding the phenomenon of the outer ring shrinking inward due to the loss of constraint of the outer ring of the bottom 2 of the diaphragm 2.

[0025] like Figure 2 As shown, after the diaphragm 2 is placed on the support part 3, the bottom 21 of the diaphragm 2 protrudes upward from the support part 3 and even the entire clamp block 1, thereby facilitating the machining operation of the diaphragm.

[0026] When the diaphragm 2 is placed on the support part 3, there is always a gap between the end face of the peripheral wall 22 and the bottom of the annular groove 32, so as to avoid the annular groove 32 affecting the adhesion between the bottom 21 of the diaphragm 2 and the bottom attachment area 31.

[0027] In one embodiment, such as Figure 1 , 4 As shown, the bottom attachment area 31 is provided with a vacuum adsorption tank 7 that connects to the vacuum channel 4. The vacuum adsorption tank 7 consists of several strip-shaped grooves that are evenly distributed circumferentially along the vacuum channel 4 and extend radially along the bottom attachment area 31. The strip-shaped grooves connect the annular groove 32 and the vacuum channel 4.

[0028] In this embodiment, four strip grooves are provided. Of course, the number of strip grooves is not limited to this; it can also be six, eight, etc.

[0029] The vacuum adsorption tank can also be multiple annular tanks of different radii, each concentric with the vacuum channel 4, or an annular spiral tank, etc.

[0030] A vacuum adsorption tank is provided so that all parts of the bottom 21 of the diaphragm 2 can be firmly attached to the bottom attachment area 31, thereby preventing the diaphragm 2 from lifting, moving, or deflecting during machining, thus better ensuring the machining accuracy of the diaphragm 2.

[0031] In one embodiment, such as Figure 1 , 2As shown, the end of the vacuum channel 4 near the support part 3 matches the shape of the central protrusion 23 of the diaphragm 2, so as to serve as a positioning center protrusion 23. The central protrusion 23 does not interfere with the communication between the vacuum adsorption tank 7 and the vacuum channel 4.

[0032] On the one hand, the diaphragm 2 has a central protrusion 23, which can be used to pre-position the diaphragm 2 by cooperating with the vacuum channel 4 to prevent the diaphragm 2 from being placed off-center on the support part 3.

[0033] On the other hand, the center of the bottom attachment area 31 is unsupported due to the presence of the vacuum channel 4, and the suction force is relatively strong. Without the central protrusion 23, the center of the membrane 2 is prone to depression when it is adsorbed. The central protrusion 23 makes the center of the membrane 2 thicker and harder than other parts. The end of the vacuum channel 4 near the support part 3 can also support the central protrusion 23, which solves the problem well.

[0034] In this embodiment, the peripheral wall 22 and the central protrusion 23 of the diaphragm 2 are positioned respectively, and the bottom 21 of the diaphragm 2 is vacuum adsorbed. The diaphragm 2 can be well fixed without causing the bottom 21 of the diaphragm 2 to deform, so as to perform high-precision machining operations on the diaphragm 2. The thickness of the bottom 21 of the diaphragm 2 can reach 0.15mm, and the machining accuracy can reach ±2μm.

[0035] In one embodiment, such as Figure 4 As shown, the diaphragm processing fixture also includes a vacuuming mechanism 5 and a vacuuming tube 6. The vacuuming mechanism 5 is connected to the vacuuming channel 4 through the vacuuming tube 6. The vacuuming tube 6 can be a flexible hose for easy on-site setup. The vacuuming mechanism 5 is used to perform vacuuming operations on the support part 3.

[0036] Of course, the mechanism for evacuating the bearing part 3 is not limited to those described above. It can also be a piston that is slidably fitted in the vacuum channel 4 and a drive mechanism for driving the piston to reciprocate within the vacuum channel.

[0037] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A diaphragm processing fixture, characterized in that, Includes a clamp block (1), the clamp block (1) having a support portion (3) for supporting a diaphragm (2) and a vacuum channel (4) for performing a vacuum operation on the support portion (3) so that the diaphragm (2) adheres to the support portion (3); wherein, The diaphragm (2) includes a bottom (21), a peripheral wall (22) connected to the bottom (21) and surrounding the outer periphery of the bottom (21), and a central protrusion (23) located at the center of the bottom (21) and protruding toward the protruding side of the peripheral wall (22). The supporting part (3) has a bottom attachment area (31) for the bottom (21) to attach to, and an annular groove (32) for the peripheral wall (22) to extend into. The bottom attachment area (31) is located in the area enclosed by the inner circle of the annular groove (32). The bottom attachment area (31) is provided with a vacuum adsorption groove (7) that connects to the vacuum channel (4). The vacuum adsorption groove (7) is a number of strip grooves that are evenly distributed along the circumference of the vacuum channel (4) and extend radially along the bottom attachment area (31) to the annular groove (32). The vacuum channel (4) extends axially through the center of the bottom attachment area (31). The end of the vacuum channel (4) near the support part (3) matches the shape of the central protrusion (23) to serve as a positioning support for the central protrusion (23). The central protrusion (23) does not interfere with the communication between the vacuum adsorption groove (7) and the vacuum channel (4).

2. The diaphragm processing fixture according to claim 1, characterized in that, It also includes a vacuum pumping mechanism (5) and a vacuum pumping tube (6), wherein the vacuum pumping mechanism (5) is connected to the vacuum pumping channel (4) through the vacuum pumping tube (6).

3. The diaphragm processing fixture according to claim 1, characterized in that, The membrane (2) is made of PFA or PTFE.

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