Optical quadratic element based profile tolerance measurement method for spherical surface

Abstract

The invention discloses an optical quadratic element based profile tolerance measurement method for the spherical surface, and relates to the field of spherical surface contour degree detection of machine tooled parts. The method comprises that S1) all parts are arranged successively, and placed on a projector to project 2D surface contour degree lines successively; S2) an ideal 2D surface contourdegree zone of the parts s drafted, and a head model with a 2D surface contour degree tolerance zone of the parts is made; S3) the ideal 2D surface contour degree zone is overlapped with a measured practical 2D surface contour degree line, namely, the head model is overlapped in the head portion of a measured part; and S4) if the measured practical 2D surface contour degree line within the ideal2D surface contour degree zone is qualified, and otherwise, is unqualified. The method is simple, easy in measurement, and extremely high in practicality and social value.

Description

technical field [0001] The invention relates to the field of detecting the profile degree of a spherical surface of a machined part, in particular to a method for measuring the profile degree of a spherical surface based on an optical two-dimensional element. Background technique [0002] The surface contour of parts in machining has certain requirements. The ideal contour of the surface contour is the area between the two enveloping surfaces of concentric circles. When the surface contour of the part is within the area of ​​the ideal contour, it means that the part The surface profile is qualified. However, surface profile is a geometric element that is difficult to define. Unlike general regular geometric elements, it can be precisely defined with a small number of parameters, so the inspection of free-form surface machining accuracy has become more complicated, mainly in It is impossible to directly use the measured surface itself as the measurement reference, so that th...

AI Technical Summary

Problems solved by technology

However, surface profile is a geometric element that is difficult to define. Unlike general regular geometric elements, it can be precisely defined with a small number of parameters, so the inspection of free-form surface machining accuracy has become more complicated, mainly in It is impossible to directly use the measured surface itself as the measurement reference, so that the measurement results contain systematic errors caused by the misalignment of the measurement coordinate system and the design coordinate system

Images