High-precision testing device for the inner diameter of ring parts and its usage method

Abstract

This invention relates to a high-precision detection device for the inner diameter of a ring-shaped component and its method of use. The high-precision detection device for the inner diameter of a ring-shaped component includes: an inner diameter measuring instrument with a measuring rod placed laterally for contacting the inner wall of the workpiece; two spaced-apart height measuring instruments for measuring their own height position, fixed to a fixed part parallel to the measuring rod; a support with the fixed part at its upper end and the inner diameter measuring instrument fixed at its lower end; and a detection module electrically connected to the inner diameter measuring instrument and the height measuring instruments, which calculates the inclination of the measuring rod using the height value obtained by the height measuring instrument and the distance between the two height measuring instruments, and calculates the actual inner diameter value using the preliminary inner diameter value obtained by the inner diameter measuring instrument and the inclination value. This invention has the advantages of high precision and ease of use.

Description

Technical Field

[0001] This invention relates to a high-precision detection device for the inner diameter of an annular component and its method of use. Background Technology

[0002] After the roller ring is produced, it is first machined with a high-precision surface grinder to ensure the parallelism and flatness of the roller ring end face. Then, using the roller ring end face as a reference surface, internal grinding is performed to make the inner diameter of the roller ring reach the set value. This requires multiple inner diameter checks of the roller ring. To reduce production costs, the inner diameter of roller rings and other ring-shaped parts is generally measured manually using a dial indicator or micrometer. First, the inner micrometer is calibrated with the corresponding ring gauge. Then, the inner micrometer is inserted into the roller ring, and the pointer is read through a three-point positioning circle. Finally, the difference from the standard ring gauge is calculated to determine the inner hole size.

[0003] However, when measuring manually, it is impossible to guarantee that the measuring rod of the inside micrometer is completely perpendicular to the inner wall when taking the reading. Usually, the measuring rod of the inside micrometer is swung so that the measuring head at one end of the measuring rod contacts different positions above and below, and the smallest reading is obtained. This operation and reading require a high level of skill in manual operation. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision and easy-to-use device for detecting the inner diameter of annular parts.

[0005] To achieve the above objectives, the present invention employs a high-precision detection device for the inner diameter of annular components, comprising:

[0006] An internal diameter measuring instrument is equipped with a measuring rod that is placed horizontally and used to contact the inner wall of the workpiece;

[0007] Two spaced-apart height measuring instruments are used to measure their own height position and are fixed on a fixed part parallel to the measuring rod;

[0008] The bracket has the fixing part at its upper end and the inner diameter measuring instrument is fixed at its lower end.

[0009] The detection module is electrically connected to the inner diameter measuring instrument and the height measuring instrument. It calculates the inclination of the measuring rod by using the height value obtained by the height measuring instrument and the distance between the two height measuring instruments. It can also calculate the actual value of the inner diameter by using the preliminary value of the inner diameter obtained by the inner diameter measuring instrument and the inclination.

[0010] This invention calculates the tilt angle of the measuring rod and then performs compensation calculations. It eliminates the need for traditional manual swinging to find the minimum value based on experience. Instead, it uses two height sensors in the detection module to measure the tilt angle and then uses trigonometric functions to convert the tilt measurement into the true diameter. This allows the true inner diameter to be obtained in one go while ensuring low cost, eliminating the difficult operation of manually finding the minimum value and achieving the technical objectives of high precision and ease of use.

[0011] This invention can improve the accuracy and efficiency of inner diameter measurement and reduce human error; by automatically calculating and displaying the results, it simplifies the operation process of inner diameter measurement and does not require experienced inspectors, making it more convenient to use.

[0012] Preferably, the bracket is equipped with a digital display screen that is electrically connected to the detection module. The digital display further facilitates the detection workers in obtaining specific values.

[0013] Preferably, a control button is also included. When the control button is triggered, the detection module starts and calculates the actual value of the inner diameter. Only after the button is pressed does the detection module perform the calculation and obtain the final value. This avoids interference from large amounts of data for the inspection worker, reduces the computational load of the detection module, and allows the use of a lower-cost microcontroller.

[0014] Preferably, one end of the measuring rod is provided with at least three first measuring heads arranged at equal heights and uniformly spaced in a ring, and the other end of the measuring rod is provided with a second measuring head, which is coaxially arranged with one of the first measuring heads.

[0015] Traditional three-point micrometers require first "slightly swinging to find the smallest value" and then locking to take the reading; now, simply inserting the probe completes self-centering and sampling, which is more convenient and easier to use.

[0016] Preferably, the two height measuring instruments are set at the same height. Numerical calculations can be performed directly using trigonometric functions such as sinθ = (H1–H2) / L and tanθ = (H1–H2) / L, without needing to subtract the initial height difference first, thus reducing the number of instructions required by the detection module.

[0017] The present invention also employs a method for using the above-mentioned high-precision detection device for the inner diameter of annular parts, comprising the following steps:

[0018] S1. Place the inner diameter measuring instrument in the inner hole of the ring, so that the measuring heads at both ends of the measuring rod contact the inner wall of the ring, and obtain the current inner hole size A through the inner diameter measuring instrument;

[0019] S2. Obtain the distance to the upper end face of the ring using two height measuring instruments, and obtain the height values ​​H1 and H2;

[0020] S3. The detection module receives height values ​​H1 and H2, the distance L between the two height measuring instruments, and the inner hole size A; it uses trigonometric functions to calculate the tilt angle of the measuring rod based on the height values ​​H1 and H and the distance L; and then calculates the actual inner hole size perpendicular to the end face of the annular part based on the tilt angle and the size A.

[0021] This invention has the advantages of high precision and ease of use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure when the present invention is used. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figure 1 As shown in the figure, this embodiment discloses a high-precision detection device for the inner diameter of an annular component, including a bracket 1, an inner diameter measuring instrument 2, two height measuring instruments 3 of equal height, and a detection module.

[0025] The internal diameter measuring instrument 2 in this embodiment uses a dial indicator with a head 21 for internal diameter measurement. It has a measuring rod 22 placed horizontally for contacting the inner wall of the workpiece. Measuring heads are located at both ends of the measuring rod 22. One end of the measuring rod 22 has three first measuring heads 221 arranged at equal heights and uniformly spaced in a ring. The other end of the measuring rod 22 has a second measuring head, which is coaxially arranged with the first measuring head located in the middle. Before use, a ring gauge must be used for calibration to ensure that the reading error of the indicator is within the allowable range. A circle is defined by the second measuring head and the two first measuring heads located on the side.

[0026] The height measuring instrument 3 is used to measure its own height position and is fixed on the fixed part 11 parallel to the measuring rod 22. In this embodiment, a laser rangefinder is used as the height measuring instrument 3. The distance between the two height measuring instruments 3 is fixed after debugging and confirmation. The distance between the two height measuring instruments 3 is determined according to the size of the roller ring 100 to be tested, so that the height measuring instrument 3 can detect the distance between the upper end face of the roller ring 100 to be tested and the height measuring instrument 3.

[0027] The upper end of the bracket 1 has the fixing part 11, the middle part of the bracket 1 is thinner for easy hand holding, and the lower end of the bracket 1 is fixed with the inner diameter measuring instrument 2. In this embodiment, the dial indicator 21 of the inner diameter measuring instrument 2 is located at the tip of the fingernail 1. The verticality of the bracket 1 is within 0.005mm.

[0028] The detection module is electrically connected to the inner diameter measuring instrument 2 and the height measuring instrument 3. It calculates the inclination of the measuring rod 22 using the height value obtained from the height measuring instrument 3 and the distance between the two height measuring instruments 3. It can also calculate the actual inner diameter value using the preliminary inner diameter value obtained from the inner diameter measuring instrument 2 and this inclination. The bracket 1 is equipped with a digital display screen 41 electrically connected to the detection module. The detection module includes a housing 4, and the digital display screen 41 is integrated into the housing 4. The bracket 1 is also equipped with a control button 42 electrically connected to the detection module. When the control button 42 is triggered, the detection module starts and calculates the actual inner diameter value.

[0029] The usage method of this embodiment includes the following steps:

[0030] S1. The worker holds the middle of the support 1 and places the inner diameter measuring instrument 2 in the inner hole of the annular part (the roller ring to be measured 100), so that the measuring heads at both ends of the measuring rod 22 contact the inner wall of the annular part (the roller ring to be measured 100), and the height measuring instrument 3 is positioned directly above the upper end face of the annular part (the roller ring to be measured 100). The inner diameter measuring instrument 2 obtains the current inner hole size A.

[0031] S2. The distance to the upper end face of the annular part (the roller ring 100 to be tested) is obtained by two height measuring instruments 3, and the height values ​​H1 and H2 are obtained;

[0032] S3. Press control button 42. The detection module receives height values ​​H1 and H2, the distance L between the two height measuring instruments, and the inner hole size A. Using trigonometric functions, the tilt angle of the measuring rod is determined based on the height values ​​H1 and H and the distance L. Then, based on the tilt angle and size A, the actual inner hole size in the direction perpendicular to the end face of the annular part (the roller ring 100 to be tested) is calculated.

[0033] This embodiment does not require high inspection skills from employees grinding internal cylinders. It can ignore the angle of the measuring rod during operation, filter out the angle error of manual operation, and ensure that the correct inner hole size is output when the end face is the horizontal plane.

Claims

1. A high-precision detection device for the inner diameter of an annular component, characterized in that... include: An internal diameter measuring instrument is equipped with a measuring rod that is placed horizontally and used to contact the inner wall of the workpiece; Two spaced-apart height measuring instruments are used to measure their own height position and are fixed on a fixed part parallel to the measuring rod; The bracket has the fixing part at its upper end and the inner diameter measuring instrument is fixed at its lower end. The detection module is electrically connected to the inner diameter measuring instrument and the height measuring instrument. It calculates the inclination of the measuring rod by using the height value obtained by the height measuring instrument and the distance between the two height measuring instruments. It can also calculate the actual value of the inner diameter by using the preliminary value of the inner diameter obtained by the inner diameter measuring instrument and the inclination.

2. The high-precision detection device for the inner diameter of an annular component according to claim 1, characterized in that: The bracket is equipped with a digital display screen that is electrically connected to the detection module.

3. The high-precision detection device for the inner diameter of an annular component according to claim 1, characterized in that: It also includes a control button. Once the control button is triggered, the detection module starts and calculates the actual value of the inner diameter.

4. The high-precision detection device for the inner diameter of an annular component according to claim 1, characterized in that: One end of the measuring rod is provided with at least three first measuring heads arranged at equal heights and uniformly spaced in a ring, and the other end of the measuring rod is provided with a second measuring head, which is coaxially arranged with one of the first measuring heads.

5. The high-precision detection device for the inner diameter of an annular component according to claim 1, characterized in that: The two height measuring instruments are set at the same height.

6. A method of using the high-precision detection device for the inner diameter of an annular component as described in any one of claims 1-5, characterized in that... Includes the following steps: S1. Place the inner diameter measuring instrument in the inner hole of the ring, so that the measuring heads at both ends of the measuring rod contact the inner wall of the ring, and obtain the current inner hole size A through the inner diameter measuring instrument; S2. Obtain the distance to the upper end face of the ring using two height measuring instruments, and obtain the height values ​​H1 and H2; S3. The detection module receives height values ​​H1 and H2, the distance L between the two height measuring instruments, and the inner hole size A; it uses trigonometric functions to calculate the tilt angle of the measuring rod based on the height values ​​H1 and H and the distance L; and then calculates the actual inner hole size perpendicular to the end face of the annular part based on the tilt angle and the size A.

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