A device and method for measuring the coaxiality of a parallel binaural part cone

Abstract

The application discloses a device and method for measuring coaxiality of parallel double-ear part conical holes, the device comprises a conical surface positioning gauge, a stepped shaft and a conical measuring block, the small base of the conical surface positioning gauge extends out of the stepped shaft, the conical measuring block can be sleeved on the stepped shaft, and the conical measuring block is marked with a scale line; the method comprises the following steps: S1, selecting the conical surface positioning gauge and the stepped shaft according to the conical hole of the parallel double-ear part; S2, the conical surface positioning gauge is attached to one conical hole of the parallel double-ear part, and the stepped shaft passes through the other conical hole; S3, the conical measuring block is sleeved into the stepped shaft until the small base of the conical measuring block contacts the side wall of the conical hole; S4, the depth of the conical measuring block entering the conical hole is measured; and S5, the coaxiality deviation value is calculated according to the depth of the conical measuring block entering the conical hole. The method solves the problem that the existing technology needs to use a measuring instrument to measure the coaxiality deviation value of the parallel double-ear conical hole, thereby improving the efficiency.

Description

Technical Field

[0001] This invention relates to the field of coaxiality measurement, and in particular to an apparatus and method for measuring the coaxiality of tapered holes in parallel double-ear parts. Background Technology

[0002] like Figure 1 As shown, some machined parts currently feature parallel double-eared discs and two tapered holes on each disc. Due to the installation and fitting relationship, the coaxiality of the two tapered holes requires high precision and needs to be measured carefully. Current methods for measuring this coaxiality are performed on a measuring machine. The drawback of this method is that the process requires first aligning one tapered hole as a reference, and then marking points on the other tapered hole to check its coaxiality with the reference. This marking and alignment process is cumbersome, taking at least 10 minutes for alignment and at least 5 minutes for inspection on a measuring machine. Current technology requires at least 15 minutes to inspect a single part. Therefore, there is an urgent need for a rapid measurement method for the coaxiality of parallel double-eared tapered holes on parts, capable of determining the specific numerical value of the coaxiality deviation. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem of low efficiency caused by the need for measuring instruments in the prior art to measure the coaxiality of parallel double-eared tapered holes, and to provide a device and method for measuring the coaxiality of tapered holes in parallel double-eared parts.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] A device for measuring the coaxiality of tapered holes in parallel double-eared parts includes a tapered surface positioning gauge, a stepped shaft, and a tapered measuring block.

[0006] The tapered surface of the tapered positioning gauge is used to fit with a tapered hole of the parallel double-ear part. The small base of the tapered positioning gauge extends out of the stepped shaft, and the stepped shaft is coaxial with the tapered positioning gauge.

[0007] The conical measuring block can be fitted onto the stepped shaft. The slope of the conical surface of the conical measuring block is the same as the slope of the conical hole of the parallel double-ear part. The conical surface is marked with scale lines corresponding to the coaxiality deviation values ​​of the conical measuring block entering the conical hole of the parallel double-ear part at different depths.

[0008] Preferably, the small base is a relatively small circular base.

[0009] Preferably, the cone surface of the cone measuring block is divided into four equidistant parts for marking the scale lines.

[0010] Preferably, the scale lines are offset by 1 / 4 of a grid for marking.

[0011] Preferably, each division of the scale represents a coaxiality deviation of 0.5 mm.

[0012] A method for measuring the coaxiality of tapered holes in parallel double-eared parts, using the aforementioned apparatus for measuring the coaxiality of tapered holes in parallel double-eared parts, includes the following steps:

[0013] S1. Based on the selection of the tapered hole of the parallel double-ear part and the tapered surface positioning gauge with the same slope of the tapered hole as the stepped shaft;

[0014] S2. The conical positioning gauge fits into one conical hole of the parallel double-ear part, and the stepped shaft passes through the other conical hole;

[0015] S3. Insert the conical measuring block into the stepped shaft until the small bottom of the conical measuring block contacts the side wall of the conical hole;

[0016] S4. Measure the depth to which the conical measuring block enters the conical hole;

[0017] S5. Calculate the coaxiality deviation value based on the depth of the conical measuring block entering the conical hole.

[0018] Preferably, in step S4, the depth of the conical measuring block entering the conical hole is measured by subtracting the axial length of the portion of the conical measuring block that does not enter the conical hole from the axial length of the conical measuring block. The axial direction refers to the direction parallel to the theoretical axis of the two conical holes.

[0019] Preferably, in step S5, the formula for calculating the coaxiality deviation value is as follows:

[0020] h1 = h * (1 - L2 / L1)

[0021] Where h1 is the coaxiality deviation of the conical hole, h is the difference between the large base radius and the small base radius of the conical hole, L1 is the depth of the conical hole, L2 is the depth of the conical measuring block entering the conical hole, and the large base is the relatively large bottom circle.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The measurement method and device of this invention are simple and easy to use, and can quickly measure and read the coaxiality deviation value of the tapered hole of a parallel double-ear part. Attached image description:

[0024] Figure 1 Schematic diagram of the cross-section of a parallel double-eared conical hole

[0025] Figure 2 Cross-sectional view of the measuring device

[0026] Figure 3 This is a schematic diagram of the measurement method of the present invention.

[0027] Figure 4Diagram of scale markings for the conical measuring block Detailed Implementation

[0028] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Example

[0030] The method in this embodiment includes the following steps:

[0031] S1. Based on the selection of the tapered hole of the parallel double-ear part and the tapered surface positioning gauge with the same slope of the tapered hole as the stepped shaft;

[0032] S2. The conical positioning gauge fits into one conical hole of the parallel double-ear part, and the stepped shaft passes through the other conical hole;

[0033] S3. Insert the conical measuring block into the stepped shaft until the small bottom of the conical measuring block contacts the side wall of the conical hole;

[0034] S4. Measure the depth to which the conical measuring block enters the conical hole;

[0035] S5. Calculate the coaxiality deviation value based on the depth of the conical measuring block entering the conical hole. The calculation formula is as follows:

[0036] h1 = h * (1 - L2 / L1)

[0037] Where h1 is the coaxiality deviation of the conical hole, h is the difference between the large base radius and the small base radius of the conical hole, L1 is the depth of the conical hole, and L2 is the depth to which the conical measuring block enters the conical hole. The large base is the relatively large base circle. The derivation of this calculation formula is as follows:

[0038] like Figure 3 As shown, triangles ABC and ADE are similar triangles, and therefore the following relationship exists:

[0039] L2=L1-h1 / tanθ

[0040] L1=h / tanθ

[0041] and then

[0042] h1 = h * (1 - L2 / L1)

[0043] This method converts the depth L2 of the conical measuring block entering the conical hole into a coaxiality deviation value h1. L2 is obtained by measuring the axial length of the conical measuring block before it enters the conical hole, and then subtracting the axial length of the conical measuring block before it enters the conical hole from L1. The axial direction refers to the direction parallel to the theoretical axis of the two conical holes. The coaxiality deviation value h1, which is obtained by converting different depths L2 of the conical measuring block entering the conical hole, is engraved around the conical measuring block to intuitively read the coaxiality deviation value corresponding to the current depth of the conical measuring block entering the conical hole.

[0044] To achieve the above measurement method, such as Figure 2 The device shown is for measuring the coaxiality of a conical hole in a parallel double-eared part. It includes a conical positioning gauge, a stepped shaft, and a conical measuring block. The conical surface of the positioning gauge is used to fit against a conical hole in the parallel double-eared part. The small base of the positioning gauge extends out to form the stepped shaft, which is coaxial with the positioning gauge. The conical measuring block can be fitted onto the stepped shaft. The slope of the conical surface of the measuring block is the same as the slope of the conical hole in the parallel double-eared part. The conical surface is marked with scale lines corresponding to different depths the measuring block enters the conical hole of the parallel double-eared part, representing the coaxiality deviation values. The conical surface of the measuring block is divided into four equidistant parts for marking the scale lines. Figure 4 As shown, each division of the scale represents a coaxiality deviation of 0.5mm. The scale lines are offset by 1 / 4 division for marking, which makes the reading accuracy higher. The offset means that if the first scale line is marked at 0mm, then the second, third, and fourth scale lines will be marked at 0.125mm, 0.25mm, and 0.375mm respectively.

[0045] As a preferred embodiment, when a user uses the device to measure a part with a double-eared tapered hole according to the method described above, the coaxiality deviation of the part with a double-eared tapered hole can be quickly obtained by using the coaxiality deviation value marked around the cone surface of the cone measuring block. Compared with traditional measuring machines, the whole process is simple and convenient to operate, does not require complex calculations, and is highly implementable.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for measuring the coaxiality of tapered holes in parallel double-ear parts, characterized in that, This includes a conical positioning gauge, a stepped shaft, and a conical measuring block; The tapered surface of the tapered positioning gauge is used to fit against one tapered hole of the parallel double-ear part. The small base of the tapered positioning gauge extends out from the stepped shaft. The stepped shaft is coaxial with the tapered positioning gauge and passes through the other tapered hole of the parallel double-ear part. The conical measuring block can be fitted onto the stepped shaft. The slope of the conical surface of the conical measuring block is the same as the slope of the conical hole of the parallel double-ear part. The conical surface of the conical measuring block is marked with scale lines corresponding to the coaxiality deviation values ​​of the conical measuring block entering the conical hole of the parallel double-ear part at different depths.

2. The device for measuring the coaxiality of the tapered holes of parallel double-ear parts according to claim 1, characterized in that, The small base is a relatively small circular base.

3. The device for measuring the coaxiality of the tapered holes in parallel double-ear parts according to claim 1, characterized in that, The cone-shaped measuring block has its cone surface divided into four equidistant sections for marking the scale lines.

4. The device for measuring the coaxiality of the tapered holes in parallel double-ear parts according to claim 1, characterized in that, The scale lines are offset by 1 / 4 of a grid for marking.

5. The device for measuring the coaxiality of the tapered holes of parallel double-ear parts according to claim 1, characterized in that, Each division of the scale represents a coaxiality deviation of 0.5 mm.

6. A method for measuring the coaxiality of tapered holes in parallel double-ear parts, characterized in that, The apparatus for measuring the coaxiality of tapered holes in parallel double-ear parts as described in claim 1 includes the following steps: S1. Based on the selection of the tapered hole of the parallel double-ear part and the tapered surface positioning gauge with the same slope of the tapered hole as the stepped shaft; S2. The conical positioning gauge and the parallel double-ear part fit together with one conical hole, and the stepped shaft passes through the other conical hole; S3. Insert the conical measuring block into the stepped shaft until the small bottom of the conical measuring block contacts the side wall of the conical hole; S4. Measure the depth of the conical measuring block entering the conical hole; S5. Calculate the coaxiality deviation value based on the depth of the conical measuring block entering the conical hole.

7. A method for measuring the coaxiality of tapered holes in parallel double-ear parts according to claim 6, characterized in that, In step S4, the depth of the conical measuring block entering the conical hole is measured by subtracting the axial length of the portion of the conical measuring block that does not enter the conical hole from the axial length of the conical measuring block. The axial direction refers to the direction parallel to the theoretical axis of the two conical holes.

8. A method for measuring the coaxiality of tapered holes in parallel double-ear parts according to claim 7, characterized in that, In step S5, the formula for calculating the coaxiality deviation value is: h1 = h * (1 - L2 / L1) Where h1 is the coaxiality deviation of the conical hole, h is the difference between the large base radius and the small base radius of the conical hole, L1 is the depth of the conical hole, L2 is the depth of the conical measuring block entering the conical hole, and the large base is the relatively large bottom circle.

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