Method for detecting cross-section profile by utilizing two-dimensional measuring machine

Abstract

The invention relates to a method for detecting a cross-section profile by utilizing a two-dimensional measuring machine, belonging to the technical field of mechanical processing. The method comprises the following steps of adopting a two-dimensional measuring machine, setting a grating ruler on the two-dimensional measuring machine, contacting a spherical probe with a tested cross section, and acquiring the position information of the spherical probe through the grating ruler. According to the method provided by the invention, the probe and a test rod are selected according to the structure of the tested part, so as to achieve the universality, and overcome the problem that some parts with special structures such as arc-shaped tongues and grooves cannot be detected by using the conventional optical projection method; and the measurement method can be used for realizing on-line processing and measuring synchronously, and the detection time is short and the operation process is simple.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for detecting the profile degree of a section by using a two-dimensional measuring machine. Background technique [0002] The detection methods of tongue and groove profile are generally optical projection method and three-coordinate measuring machine detection method, and the use of these two methods has great limitations. The optical projection method detects the profile of the tongue and groove concentrated on the linear structure of the tongue and groove, and the detection of the arc structure of the tongue and groove or other parts that cannot pass through the light cannot be realized, and due to many insurmountable problems in the processing of the tongue and groove The size is inconsistent, so the test results only show the results of the larger parts of the entity, and there are errors in the test results. The method of using a three-co...

AI Technical Summary

Problems solved by technology

The optical projection method detects the profile of the tongue and groove concentrated on the linear structure of the tongue and groove, and the detection of the arc structure of the tongue and groove or other parts that cannot pass through the light cannot be realized, and due to many insurmountable problems in the processing of the tongue and groove The size is inconsistent, so the test result only shows the result of the larger part of the entity, and there is an error in the test result

The method of using a three-coordinate measuring machine for detection has higher requirements on the measuring mechanism. First, the continuous touch measuring head is required to detect the profile of the tenon and groove section. The price of the measuring head that can meet the requirements generally reaches one million yuan. The price of the measuring machine is even more astonishing, generally reaching millions of RMB; secondly, the traditional three-coordinate measuring machine cannot realize online detection. For tenon and groove processing, the inability to realize online measurement means that the processing cannot be carried out normally; Long, the detection must be carried out in sections according to the probe structure, the cost of such detection is too high, and the data processing is too difficult, because the three-coordinate measurement method cannot directly obtain the single contour evaluation conclusion of the part, and can only be eliminated through complex positional errors process to decompose shape error and position error

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