Method for rapidly evaluating parallelism degree of plane relative to reference plane

Abstract

The invention belongs to the field of precision metering and computer application and relates to a rapid and simple method for rapidly evaluating the parallelism degree of a plane relative to a reference plane. The method comprises the following steps that: step 1, a measuring point set is acquired, a state element set, a feature row vector set and a boundary element set are constructed according to the measuring point set, and the position of a gauge is determined according to the measuring point set; step 2, two key points are acquired; step 3, an analysis matrix is constructed with the key point set; step 4, rank analysis is carried out, whether optimization is continued or not is determined, and an optimization strategy is determined; step 5, the analysis matrix and an analysis column vector are solved, so that an optimization direction is obtained; step 6, a new key point is solved, a measurement point coordinate set and the position of the gauge are updated, and the method enters the next circulation step; step 7, the flatness of the reference plane is calculated; step 8, flatness error t is compared with a given tolerance value TD, and whether the flatness is qualified or not is judged; and step 9, if the flatness is qualified, the parallelism error value of a plane to be measured is calculated; and step 10, parallelism error t' is compared with a given tolerance value T'D, and whether parallelism is qualified or not is judged.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a fast and simple method for evaluating the parallelism of a reference plane, which can be used for the qualification detection and evaluation of the parallelism error of the plane relative to the reference plane, and is used for the processing technology. Provide reasonable guidance for improvement. Background technique [0002] Shape error (short for shape error and position error) has a direct impact on the assembly accuracy, working accuracy and service life of machines and instruments. In order to control the shape error of machine parts, improve the accuracy of the machine and prolong the service life , to ensure interchangeability, it is of great significance to perform fast and accurate part error calculation. [0003] The national standard GB / 1182-2018 stipulates a plane parallelism tolerance relative to the datum plane, and the surface to be ...

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and is not always stable for the geometry evaluation task

[0011] To sum up, when the current geometric evaluation method is applied to the plane parallelism relative to the reference plane, it cannot take into account the characteristics of stability, speed and simple form at the same time.

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