A method of inspection suitable for use in an optical measurement tool

Abstract

The application discloses a detection method suitable for an optical measurement tool, which comprises the following steps: firstly, establishing a theoretical data model by using the measurement tool; secondly, establishing an actual data model according to the theoretical data model; and finally, performing actual measurement by using a three-coordinate measuring machine, and determining whether the measurement tool is qualified according to the data obtained in the actual measurement. The detection method can solve the bottleneck that cannot be detected by a laser tracker optical measurement tool by using the three-coordinate measuring machine, the configured tool plate and the measuring ball, broaden the range of the laser tracker installation and use tools, break the monopoly of the optical measurement tool, achieve the detection purpose, reduce the purchase cost and be suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tool measurement, in particular to a detection method suitable for optical measurement tools. BACKGROUND

[0002] The laser tracker is a three-dimensional optical coordinate measuring instrument composed of laser interference, range finder and two mutually perpendicular angle encoders. The laser tracker is an instrument that realizes measurement by using the principles of light reflection, light interference and photoelectric signal conversion. It uses laser to track the target mirror, determines the coordinates of the space point through its angle measurement system and laser ranging system, and thus realizes the complete measurement process. Its measurement accuracy can reach 10um. The laser tracker is the most accurate portable space large-size coordinate measurement system developed in recent years. This system has the advantages of large measurement range, high accuracy, real-time speed and dynamic flexibility, and has been widely used in the fields of part processing and manufacturing, large-size equipment installation and debugging, and reverse engineering.

[0003] In actual application process, the optical measurement tools for installing the laser tracker are provided by the manufacturer and need to be purchased as device accessories. With the progress of modern technology, the specifications of the original device accessories cannot meet the current use requirements. At the same time, in the long-term application process, if the configured measurement tools are damaged, new measurement tools can only be purchased from the manufacturer to continue using. At present, various use units begin to design and manufacture measurement tools by themselves, but the designed measurement tools have no measurement reference and are provided with a ball socket at the top of the optical measurement tool. Therefore, the conventional measurement method cannot be directly detected, and it is unknown whether the processed product meets the use. Therefore, it is necessary to determine whether the processed measurement tool meets the use, and to provide a convenient measurement method. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the problems in the background art. In order to conveniently determine whether the processed measurement tool meets the use requirement, a simple structure and convenient operation detection method is provided. The existing three-coordinate measuring machine is used for measurement, so that the problem of being unable to directly detect can be solved, and the work efficiency is improved. Specifically, it is a detection method suitable for optical measurement tools.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a detection method suitable for optical measurement tools, the detection method is to first establish a theoretical data model through the measurement tool, then establish an actual data model according to the theoretical data model, and finally perform actual measurement through a three-coordinate measuring machine, and determine whether it is qualified according to the data obtained by the actual measurement. Specifically, it includes the following steps:

[0006] S1. Adopting the measurement tool which has been processed, establishing the measurement tool numerical model, so as to obtain the model coordinates of the measurement tool;

[0007] S2. According to the measurement tool numerical model, establishing the datum axis and datum surface of the tool plate required by the measurement detection, establishing the data model according to the datum axis and datum surface, and finally determining the processing module according to the data model;

[0008] S3. According to the processing module determined in step S2, processing the tool plate required by the detection configuration, and meanwhile, the measurement ball matched with the measurement tool also needs to be equipped;

[0009] S4. Fixing the tool plate in step S3 on the measurement platform of the three-coordinate measuring machine, then placing the measurement tool on the tool plate, and finally placing the measurement ball in the ball socket in the measurement tool;

[0010] S5. Starting the three-coordinate measuring machine, using the three-coordinate measuring machine to firstly measure the measurement tool, obtaining the actual measurement data of the measurement tool, then measuring with the ball center of the measurement ball as the reference point, obtaining the actual measurement data of the ball center of the measurement ball, and finally forming the report data;

[0011] S6. Analyzing the report data obtained in step S5, so as to determine whether the processed measurement tool is qualified.

[0012] Further, in the process of determining the processing module in step S2 of the detection method suitable for the optical measurement tool, firstly, an actual data model is established according to the datum axis and datum surface, then an actual measurement coordinate system is established according to the actual data model, the actual measurement coordinate system is required to be aligned with the coordinate system of the model coordinates, and finally the processing module is determined according to the actual measurement coordinate system.

[0013] Further, in the process of fixing the tool plate in step S4 of the detection method suitable for the optical measurement tool, firstly, a measurement standard block matched with the three-coordinate measuring machine is placed on the measurement platform, and then the tool plate is fixed on the measurement standard block.

[0014] Further, in the measurement process in step S5 of the detection method suitable for the optical measurement tool, the measurement datum surface is determined in advance, the datum surface is the top plane of the tool plate, after the datum surface is determined, firstly, the measurement tool is measured to obtain the height value of the measurement tool to the datum surface, then the measurement ball center is measured as the reference point to obtain the height value of the ball center of the measurement ball to the datum surface, and finally the report data is formed.

[0015] Further, in the report data analysis process of step S6, the actual measurement data of the ball center of the measurement ball and the actual measurement data of the measurement tool are compared, and the machining manufacturing tolerance of the measurement tool is judged according to the value size between the two, so as to determine whether the machined measurement tool is qualified.

[0016] Further, in the detection method for the optical measurement tool, the tool plate is provided in a cubic structure, and a plurality of support holes with different apertures are arranged in the tool plate, and the measurement tool is detachably connected with the tool plate through the support holes.

[0017] Compared with the prior art, the detection method for the optical measurement tool has the beneficial effects that: through the configured tool plate and the measurement ball, the existing three-coordinate measuring machine is used, the measurement tool model is established, the tool plate model and the ball center theoretical point model of the measurement ball on the measurement tool are determined, the reference axis and the reference surface are then determined, the tool plate for supporting is machined, the corresponding measurement ball is selected, the three-coordinate measuring machine is used to collect the measurement theoretical data reference, the actual reference is established according to the collected data, and finally the actual measurement detection is performed by using the actual reference and the three-coordinate measuring machine, so as to determine whether the machined product meets the use requirements, solve the problem that the measurement tool cannot be detected without reference, and realize the processing and detection capability of the optical measurement tool.

[0018] Therefore, the detection method uses the three-coordinate measuring machine, solves the bottleneck that the optical measurement tool of the laser tracker cannot be detected, widens the range of the installation and use of the tool of the laser tracker, breaks the monopoly of the optical measurement tool, not only achieves the detection purpose, but also reduces the procurement cost, and is suitable for popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be described in further detail below with reference to the drawings.

[0020] Figure 1 is a working principle structure schematic diagram of the detection method.

[0021] As shown in the figure: 1-measurement tool, 2-measurement ball, 3-tool plate, 4-measurement standard block, 5-measurement platform. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0023] As shown in Figure 1 The present application provides a detection method suitable for an optical measurement tool. Since the manufactured optical measurement tool has a ball socket, no reference surface is available for direct detection. The detection is performed by establishing a theoretical data model, then building an actual model according to the theoretical data model, and detecting whether the tool is qualified by the difference between the actual model and the theoretical model. The method comprises the following steps:

[0024] S1. A measurement tool 1 is used to establish a measurement tool numerical model, so as to obtain a model coordinate of the measurement tool 1;

[0025] S2. A reference axis and a reference surface of a tool plate 3 required for measurement detection are established according to the measurement tool numerical model, a data model is established according to the reference axis and the reference surface, and finally a processing module is determined according to the data model;

[0026] S3. The tool plate 3 required for detection is processed according to the processing module determined in step S2, and a measurement ball 2 matched with the measurement tool 1 is also provided;

[0027] S4. The tool plate 3 in step S3 is fixed on a measurement platform of a three-coordinate measuring machine, then the measurement tool 1 is placed on the tool plate 3, and finally the measurement ball 2 is placed in the ball socket of the measurement tool 1;

[0028] S5. The three-coordinate measuring machine is started, the measurement tool 1 is measured by the three-coordinate measuring machine to obtain actual measurement data of the measurement tool 1, the measurement ball 2 is measured by taking the center of the measurement ball 2 as a reference point to obtain actual measurement data of the center of the measurement ball 2, and finally report data is formed;

[0029] S6. The report data obtained in step S5 is analyzed to determine whether the processed measurement tool 1 is qualified.

[0030] In the specific detection process, firstly, an actual data model is established according to the reference axis and the reference surface, then an actual measurement coordinate system is established according to the actual data model, the actual measurement coordinate system is required to be aligned with the model coordinate system, and finally, a machining module is determined according to the actual measurement coordinate system; secondly, during the fixing process of the tool plate 3, a measurement standard block 4 matched with the three-coordinate measuring machine is placed on the measurement platform, and then the tool plate 3 is fixed on the measurement standard block 4; thirdly, during the measurement process, the measurement datum surface needs to be determined in advance, the datum surface is the top surface of the tool plate 3, after the datum surface is determined, the measurement tool 1 is measured first to obtain the height value of the measurement tool 1 to the datum surface, then the center of the measurement ball 2 is taken as the reference point to measure, the height value of the center of the measurement ball 2 to the datum surface is obtained, and finally, the report data is formed; fourthly, during the report data analysis process, the actual measurement data of the center of the measurement ball 2 and the actual measurement data of the measurement tool 1 are compared, the machining and manufacturing tolerance of the measurement tool 1 is judged according to the value size between the two, and whether the machined measurement tool 1 is qualified is determined.

[0031] Further, in order to meet the detection of measurement tools 1 with different outer diameters, the tool plate 3 is provided in a cubic structure, a plurality of support holes with different diameters are arranged in the tool plate 3, and the measurement tool 1 is detachably connected with the tool plate 3 through the support hole. By machining a plurality of support holes with different diameters in the tool plate 3 in advance, the tool plate 3 prepared by one-time machining can meet the detection requirements of measurement tools 1 with different outer diameters, which can reduce the machining cost and improve the detection efficiency without the need to manufacture a tool plate 3 every time.

[0032] According to the detection method for the optical measurement tool, only the tool plate 3 and the measurement ball 2 are needed for the newly manufactured optical measurement tool, the measurement tool 1 manufactured by the technician is used to establish a measurement tool 1 model, determine a model coordinate, then establish a tool plate model for fixing the measurement tool 1 and a center of the measurement ball 2 theoretical point model after the measurement ball 2 is placed on the measurement tool 1, extract lines, points and surfaces in the model according to the three-coordinate measuring machine detection principle to obtain theoretical data, the technician guides the measurement worker to use the three-coordinate measuring machine to take the collected theoretical data as a reference to establish an actual reference, after the actual reference is established, the measurement worker uses the three-coordinate measuring machine to perform actual measurement and detection, the height H of the center of the measurement ball 2 placed on the measurement tool 1 to the datum surface is measured, and the height H value is used to test the manufacturing tolerance of the newly manufactured measurement tool 1.

[0033] It can be seen that the detection method adopts the three-coordinate measuring machine, and solves the bottleneck of the optical measurement tool 1 of the laser tracker that cannot be detected by the configured tool plate 3 and the measuring ball 2, widens the range of the installation and use of the tool of the laser tracker, breaks the monopoly of the optical measurement tool 1, not only achieves the detection purpose, but also reduces the procurement cost, and is suitable for popularization and application.

[0034] Other details of the present application are well known to those skilled in the art and are not described in detail.

[0035] The protection scope of the present application is not limited to the technical solutions disclosed in the specific embodiments, and the above description is only the preferred embodiments of the present application, and does not limit the present application, and any slight modification, equivalent replacement and improvement made according to the technical solutions of the present application should be included in the protection scope of the technical solutions of the present application.

Claims

1. A detection method suitable for use in an optical measurement tool, characterized by: The detection method is to establish a theoretical data model by measuring tools, then establish an actual data model according to the theoretical data model, and finally measure the actual data by a three-coordinate measuring machine, and determine whether it is qualified according to the data obtained by the actual measurement, which specifically includes the following steps: S1. Adopting the measuring tools that have been processed, a measuring tool model is established, so as to obtain the model coordinates of the measuring tools; S2. According to the measuring tool model, the reference axis and reference surface of the tool plate required for measurement detection are established, a data model is established according to the reference axis and reference surface, and finally the processing module is determined according to the data model; S3. According to the processing module determined in step S2, the tool plate required for detection is processed, and at the same time, the measuring ball matched with the measuring tool is also needed; S4. Fix the tool plate of step S3 on the measuring platform of the three-coordinate measuring machine, then place the measuring tool on the tool plate, and finally place the measuring ball in the ball socket in the measuring tool; S5. Start the three-coordinate measuring machine, first measure the measuring tool by using the three-coordinate measuring machine, obtain the actual measurement data of the measuring tool, then measure the ball center of the measuring ball as the reference point, obtain the actual measurement data of the ball center of the measuring ball, and finally form the report data; S6. Analyze the report data obtained in step S5, so as to determine whether the processed measuring tool is qualified.

2. A detection method suitable for use in an optical measurement tool according to claim 1, characterized in that : In the process of determining the processing module in step S2, first, the actual data model is established according to the reference axis and reference surface, then the actual measurement coordinate system is established according to the actual data model, and the actual measurement coordinate system is required to be aligned with the coordinate system of the model coordinates, and finally the processing module is determined according to the actual measurement coordinate system.

3. The method of claim 1, wherein : In the process of fixing the tool plate in step S4, first, place the measuring standard block matched with the three-coordinate measuring machine on the measuring platform, and then fix the tool plate on the measuring standard block.

4. The method of claim 1, wherein : In the process of measurement in step S5, the measurement reference surface is determined in advance, which is the top surface of the tool plate, when the reference surface is determined, first measure the measuring tool to obtain the height value of the measuring tool to the reference surface, then measure the ball center of the measuring ball as the reference point to obtain the height value of the ball center of the measuring ball to the reference surface, and finally form the report data.

5. The method of claim 1, wherein : In the process of analyzing the report data in step S6, compare the actual measurement data of the ball center of the measuring ball with the actual measurement data of the measuring tool, and determine the processing and manufacturing tolerance of the measuring tool according to the numerical value between the two, so as to determine whether the processed measuring tool is qualified.

6. The method of claim 1, wherein : The tool plate is provided in a square structure, and a plurality of support holes with different hole diameters are arranged in the tool plate, and the measuring tool is detachably connected with the tool plate through the support hole.

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