Valve core slot position measuring method

Abstract

The invention provides a method for measuring a valve core slot position, which comprises the following steps of: S1, providing a valve core, confirming a detection position of a radial slot on the valve core, and measuring a distance L1 from a reference end to one side wall, close to the reference end, of the radial slot through a caliper by taking the end surface of the valve core as the reference end; s2, a patch corresponding to the radial groove is manufactured, a go gauge is arranged at one end of the patch, the go gauge is matched with the radial groove, and the length of the go gauge is L2; s3, the plug piece is placed in the radial groove, the length of the valve element groove position is measured, finally, the length of the valve element groove position is calculated, and the length L of the valve element groove position is equal to L1 + L2; and S4, repeating the steps S1 to S3 until the valve core slots of all the valve cores are tested. The distance between the reference end and the side wall, close to the reference end, of the radial groove is determined through the caliper, the patch corresponding to the radial groove is manufactured, and finally detection is conducted through the patch, so that the detection efficiency is high, detection interference is small, and the method can be suitable for all hydraulic valve main valve element parts.

Description

Technical Field

[0001] This invention relates to the field of valve core technology, and in particular to a method for measuring the position of a valve core groove. Background Technology

[0002] During the processing of valve cores, radial grooves need to be inspected one by one with calipers, which is inefficient and the accuracy is unstable. Due to the large number of grooves, errors and omissions are easy to occur if the operator is not skilled. The reference end of such parts is uniformly the end face of the part. The dimensions of the reverse position need to be obtained by measurement and calculation, which is inefficient and prone to errors. Although the accuracy of using a projector or coordinate measuring machine is high, the inspection time is too long. A new inspection method is needed for fast and accurate inspection. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a method for measuring valve core slot position, which has high detection efficiency, low detection interference, and is applicable to all hydraulic valve main valve core parts.

[0004] The technical solution adopted in this invention is: A method for measuring the position of a valve core groove, comprising the following steps: Step S1. Provide the valve core, confirm the detection position of the radial groove on the valve core, and use the end face of the valve core as the reference end to measure the distance L1 between the reference end and the side wall of the radial groove near the reference end using a vernier caliper. Step S2. Fabricate a plug corresponding to the radial groove. A go gauge is provided at one end of the plug. The outer periphery of the go gauge and the radial groove cooperate with each other. The length of the go gauge is L2. Step S3. Place the plug into the radial groove, measure the length of the valve core groove, and finally calculate the length of the valve core groove, wherein the length of the valve core groove L = L1 + L2; Step S4. Repeat steps S1-S3 until all valve core slots have been tested.

[0005] Preferably, the method for measuring the valve core groove position includes: multiple radial grooves are provided on the valve core, and each radial groove corresponds to a plug.

[0006] Preferably, the method for measuring the valve core groove position includes a radial groove diameter tolerance of ≥0.2mm.

[0007] Preferably, in the method for measuring the valve core groove position, a no-go gauge is provided at the other end of the plug, and a transition section is provided between the go gauge and the no-go gauge.

[0008] Preferably, the method for measuring the valve core groove position includes: the outer periphery of one side of the transition section is trapezoidal, and the go gauge and no-go gauge on the other side of the transition section and the corresponding side are connected in a straight line.

[0009] Preferably, in the method for measuring the valve core groove, the width of the go gauge and the width of the no-go gauge are the same, and the length of the go gauge is greater than the length of the no-go gauge.

[0010] Advantages of this invention: (1) The valve core groove measurement method of the present invention first uses calipers to confirm the distance between the reference end and the side wall of the radial groove near the reference end, then makes a plug corresponding to the radial groove, and finally uses the plug for testing. The testing efficiency is high, the testing interference is low, and it can be applied to all hydraulic valve main valve core parts.

[0011] (2) The radial groove diameter tolerance of the valve core groove in the present invention is 0.2mm. The accuracy is not high and it is easy to make mistakes because of the repeated switching of the detection direction of the parts. This tolerance will not change due to product design changes. The groove will only change due to different product models. As long as the groove is within the tolerance range, it will not affect the product performance. By designing a plug for both opening and closing in the valve core groove measurement method, multiple grooves can be detected at once by using the plug, which has high detection efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the valve core of the present invention.

[0013] Figure 2 This is a schematic diagram of the structure of the stopper of the present invention.

[0014] Figure 3 This is a schematic diagram of the structure of the plug of the present invention placed in the corresponding radial groove. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments.

[0016] Example 1 like Figures 1-3 A method for measuring the position of a valve core groove, comprising the following steps: Step S1. Provide valve core 1, confirm the detection position of radial groove 2 on valve core 1, and take the end face of valve core 1 as the reference end, measure the distance L1 between the reference end and the side wall of the radial groove near the reference end by using vernier calipers. Step S2. Fabricate a plug 3 corresponding to the radial groove 2. A go gauge 31 is provided at one end of the plug 3. The outer periphery of the go gauge 31 and the radial groove 2 cooperate with each other. The length of the go gauge 31 is L2. Step S3. Place the plug 3 into the radial groove 2, measure the length of the valve core groove, and finally calculate the length of the valve core groove, wherein the length of the valve core groove L = L1 + L2; Step S4. Repeat steps S1-S3 until all valve core slots of valve core 1 have been tested.

[0017] The valve core 1 is provided with multiple radial grooves 2, each radial groove 2 corresponding to a plug 3; the groove diameter tolerance of the radial groove 2 is ≥0.2mm.

[0018] The other end of the plug 3 is provided with a stop gauge 32, and a transition section 33 is provided between the go gauge 31 and the stop gauge 32. One side of the transition section 33 is trapezoidal in shape, and the other side of the transition section 33 and the corresponding side of the go gauge 31 and the stop gauge 32 are connected in a straight line. The width of the go gauge 31 is the same as the width of the stop gauge 32, and the length of the go gauge 31 is greater than the length of the stop gauge 32.

[0019] The valve core groove measurement method of the present invention has a radial groove diameter tolerance of 0.2mm, which is not very accurate and is prone to errors due to repeated switching of the part inspection direction. This tolerance will not change due to product design changes, but the groove will only change due to different product models. As long as the groove is within the tolerance range, it will not affect the product performance. By designing a go and stop plug in the valve core groove measurement method, multiple grooves can be inspected at once by using the plug plug method, which has high inspection efficiency.

[0020] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for measuring the position of a valve core groove, characterized in that, Includes the following steps: Step S1. Provide valve core (1), confirm the detection position of radial groove (2) on valve core (1), and take the end face of valve core (1) as the reference end, measure the distance L1 between the reference end and the side wall of the radial groove near the reference end by using vernier calipers; Step S2. Make a plug (3) corresponding to the radial groove (2). A gauge (31) is provided at one end of the plug (3). The outer periphery of the gauge (31) and the radial groove (2) cooperate with each other. The length of the gauge (31) is L2. Step S3. Place the plug (3) into the radial groove (2), measure the length of the valve core groove, and finally calculate the length of the valve core groove, where the length of the valve core groove is L = L1 + L2; Step S4. Repeat steps S1-S3 until all valve core slots (1) have been tested.

2. The method for measuring the valve core groove position according to claim 1, characterized in that: The valve core (1) is provided with multiple radial grooves (2), and each radial groove (2) corresponds to a plug (3).

3. The method for measuring the valve core groove position according to claim 1, characterized in that: The diameter tolerance of the radial groove (2) is ≥0.2mm.

4. The method for measuring the valve core groove position according to claim 1, characterized in that: The other end of the plug (3) is provided with a stop gauge (32), and a transition section (33) is provided between the go gauge (31) and the stop gauge (32).

5. The method for measuring the valve core groove position according to claim 4, characterized in that: The outer periphery of one side of the transition section (33) is trapezoidal, and the go gauge (31) and no-go gauge (32) on the other side of the transition section (33) and the corresponding side are connected in a straight line.

6. The method for measuring the valve core groove position according to claim 4, characterized in that: The width of the go gauge (31) is the same as the width of the stop gauge (32), and the length of the go gauge (31) is greater than the length of the stop gauge (32).

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