Rapid coaxiality detection device and method

By combining the flash detector or imager with the V-block, optical method is used to capture the difference in axis position from multiple angles, and the existing coaxial detection methods are solved, and the rapid and accurate synchronous Axiality detection, suitable for large-scale product inspection.

CN119468994APending Publication Date: 2025-02-18NANYUE FUEL INJECTION SYST CO LTD
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Patent Information

Application Number
CN202411870883.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

The existing coaxial detection methods have large investments, long inspection time, and the special inspection tools are poorly versatile, which cannot meet the testing needs of thousands of products.

Method used

Design a fast coaxiality detection device, using a flash detector or imager combined with a V-block, to capture the difference in the axis position from both horizontal and vertical angles through optical method, and calculate the maximum difference to obtain the coaxiality value .

Benefits of technology

It realizes fast and accurate coaxial detection, reduces labor intensity and cost, improves inspection efficiency, and is suitable for 100 inspections of products with strict customer requirements, achieving zero defects.

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Abstract

The invention discloses a rapid coaxiality detection device. The rapid coaxiality detection device comprises a flash tester or an imager and a V-shaped block, the V-shaped block is placed on a workbench of the flash tester or the imager, and a shaft part to be tested is horizontally and vertically placed on the V-shaped block in two times and is located in an optical lens range of the flash tester or the imager; the flash tester or the imager captures the axis position difference between the reference axis of the to-be-tested shaft part and the measured axis of the to-be-tested shaft part from a horizontal angle and a vertical angle by using an optical method, and calculates the maximum difference value of the values measured at different angles, thereby obtaining the coaxiality value. The invention further discloses a detection method based on the rapid coaxiality detection device. The method has the beneficial effects that 1, the method is simple, reliable and low in cost; 2, the detection efficiency is high; and 3, the device is suitable for 100 inspection of products with strict customer requirements, and zero defect is achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of batch detection of coaxiality of shaft parts, and in particular to a rapid coaxiality detection device and method. Background Art

[0002] At present, there are two main methods for coaxiality detection of industrial products. One is three-coordinate detection, and the other is to design a special detection fixture. For enterprises, the former requires a large investment, a long detection time, and requires a special person to send it to the precision testing room for detection, which is inefficient. Special inspection fixtures require experienced designers to design and are highly targeted. One inspection fixture can only detect a specific product and has poor versatility. There are tens of thousands of factory products, and it is impossible to design special inspections for all of them. Summary of the invention

[0003] One of the technical problems to be solved by the present invention is to provide a rapid coaxiality detection device for shaft parts, which can reduce labor intensity, improve work efficiency and ensure accurate detection, in view of the shortcomings of the prior art.

[0004] The second technical problem to be solved by the present invention is to provide a detection method based on the above-mentioned rapid coaxiality detection device.

[0005] In order to achieve the above-mentioned purpose of the invention, a rapid coaxiality detection device of the present invention includes: a flash tester or an imager and a V-block; the V-block is placed on the workbench of the flash tester or the imager, and the shaft parts to be tested are placed on the V-block twice in a horizontal and vertical manner and are located within the optical lens range of the flash tester or the imager; the flash tester or the imager uses an optical method to capture the difference in the axial position between the reference axis of the shaft parts to be tested and the measured axis of the shaft parts to be tested from two angles, horizontal and vertical, respectively, and calculates the maximum difference of the values ​​measured at different angles, thereby obtaining the coaxiality value.

[0006] A detection method based on the above-mentioned rapid coaxiality detection device of the present invention comprises the following steps:

[0007] Step 1: Place the V-block on the workbench of the flash tester or imager;

[0008] Step 2: The shaft parts to be tested are placed horizontally on the V-block and within the optical lens range of the flash tester or imager;

[0009] Step 3: The flash tester or imager uses an optical method to capture the axis center positions of the reference axis of the horizontally placed shaft part to be tested and the measured axis of the shaft part to be tested from a horizontal angle;

[0010] Step 4: The shaft parts to be tested are placed vertically on the V-block and within the optical lens range of the flash tester or imager;

[0011] Step 5: The flash tester or imager uses an optical method to capture the axis center positions of the reference axis of the vertically placed shaft part to be tested and the measured axis of the shaft part to be tested from a vertical angle;

[0012] Step six: Based on the difference between the axis center positions of the horizontally placed reference axis of the shaft part to be tested and the axis center positions of the shaft part to be tested captured from a horizontal angle by the flash tester or imager using an optical method in step three, and the axis center positions of the vertically placed reference axis of the shaft part to be tested and the axis center positions of the shaft part to be tested captured from a vertical angle by the flash tester or imager using an optical method in step five, calculate the maximum difference between the values ​​measured at different angles to obtain the coaxiality value.

[0013] The inventive points of the present invention are as follows: 1. The use of general instruments and auxiliary tools has wide adaptability; 2. The optical method has high measurement efficiency. It usually takes less than half an hour to inspect the three coordinates of a part, while this method only takes 10 seconds, which is only 1 / 180 of the three coordinates.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. simple, reliable and low cost; 2. high detection efficiency; 3. suitable for 100 inspections of products with strict customer requirements to achieve zero defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the principle of a rapid coaxiality detection method of the present invention.

[0016] Figure 2 This is a schematic diagram of placing the shaft parts to be tested horizontally on a V-block in the present invention.

[0017] Figure 3 This is a schematic diagram of the present invention in which the shaft parts to be tested are placed vertically on a V-block. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below, but the present invention is not limited to the scope of the embodiments.

[0019] The standard of coaxiality refers to the change between the measured axis and the reference axis, such as Figure 1 The maximum difference between the center axis of the measured cylinder and the reference cylinder in the circumferential method is shown.

[0020] Flash testers or imagers usually cannot be used to detect coaxiality values, but can only be used to detect parameters such as diameter, length, and angle.

[0021] The method adopted in the present invention is to use a flash meter or an imager to use optical methods to capture the difference in the axial position of the reference axis and the measured axis from the horizontal and vertical angles respectively, calculate the maximum difference between the values ​​measured at different angles, and thus obtain the coaxiality value. The value measured by this method has no difference after comparison with the three coordinates, and the CGK value obtained by measurement system analysis meets the national standard.

[0022] See also Figure 2 and Figure 3 A rapid coaxiality detection device of the present invention comprises: a flash tester or an imager 3 and a V-block 2; the V-block 2 is placed on a workbench 3a of the flash tester or the imager 3, and a shaft part 1 to be tested is placed on the V-block 2 twice in a horizontal and vertical manner and is located within the optical lens range of the flash tester or the imager 3; the flash tester or the imager 3 uses an optical method to capture the difference in the axial center position between the reference axis of the shaft part 1 to be tested and the axis to be tested of the shaft part 1 to be tested from two horizontal and vertical angles, respectively, and calculates the maximum difference of the values ​​measured at different angles, thereby obtaining the coaxiality value.

[0023] The specific steps are as follows:

[0024] Step 1: Place the V-block 2 on the workbench 3a of the flash tester or imager 3;

[0025] Step 2: The shaft part 1 to be tested is placed horizontally on the V-block 2 and is within the range of the optical lens 3b of the flash tester or imager 3;

[0026] Step 3: The flash tester or the imager 3 uses an optical method to capture the axis center positions of the reference axis of the horizontally placed shaft-like part 1 to be tested and the axis to be tested of the shaft-like part to be tested from a horizontal angle;

[0027] Step 4: The shaft part 1 to be tested is placed vertically on the V-block 2 and is within the range of the optical lens 3b of the flash tester or imager 3;

[0028] Step 5: The flash tester or the imager 3 uses an optical method to capture the axis center positions of the reference axis of the vertically placed shaft-like part 1 to be tested and the axis to be tested of the shaft-like part to be tested from a vertical angle;

[0029] Step six: Based on the difference between the axial center positions of the horizontally placed reference axis of the shaft part 1 to be tested and the axis to be tested of the shaft part 1 to be tested captured by the flash tester or imager 3 using an optical method from a horizontal angle in step three, and the axial center positions of the vertically placed reference axis of the shaft part 1 to be tested and the axis to be tested of the shaft part 1 to be tested captured by the flash tester or imager 3 using an optical method from a vertical angle in step five, calculate the maximum difference between the values ​​measured at different angles, thereby obtaining the coaxiality value.

Claims

1. A rapid coaxiality detection device, characterized in that: include: A flash tester or an imager and a V-block; the V-block is placed on the workbench of the flash tester or the imager, and the shaft parts to be tested are placed on the V-block twice in a horizontal and vertical manner and are located within the optical lens range of the flash tester or the imager; the flash tester or the imager uses an optical method to capture the difference in the axial position between the reference axis of the shaft parts to be tested and the measured axis of the shaft parts to be tested from two angles, horizontal and vertical, respectively, and calculates the maximum difference of the values ​​measured at different angles, thereby obtaining the coaxiality value.

2. A detection method based on the rapid coaxiality detection device of claim 1, characterized in that: The steps include: Step 1: Place the V-block on the workbench of the flash tester or imager; Step 2: The shaft parts to be tested are placed horizontally on the V-block and within the optical lens range of the flash tester or imager; Step 3: The flash tester or imager uses an optical method to capture the axis center positions of the reference axis of the horizontally placed shaft part to be tested and the measured axis of the shaft part to be tested from a horizontal angle; Step 4: The shaft parts to be tested are placed vertically on the V-block and within the optical lens range of the flash tester or imager; Step 5: The flash tester or imager uses an optical method to capture the axis center positions of the reference axis of the vertically placed shaft part to be tested and the measured axis of the shaft part to be tested from a vertical angle; Step six: Based on the difference between the axis center positions of the horizontally placed reference axis of the shaft part to be tested and the axis center positions of the shaft part to be tested captured from a horizontal angle by the flash tester or imager using an optical method in step three, and the axis center positions of the vertically placed reference axis of the shaft part to be tested and the axis center positions of the shaft part to be tested captured from a vertical angle by the flash tester or imager using an optical method in step five, calculate the maximum difference between the values ​​measured at different angles to obtain the coaxiality value.