Two-dimensional cam part shape digital measurement method based on profile

Abstract

The invention belongs to the field of measurement, and relates to a two-dimensional cam part shape digital measurement method based on profile. The method includes the following steps: (1) establishing a two-dimensional cam part shape digital measurement model; (2) calculating the profile tolerance of the actual surface curve of the shape of the model according to the two-dimensional cam part shape digital measurement model; (3) obtaining a profile measurement result of the actual surface curve of a two-dimensional cam part; and (4) comparing the obtained profile measurement result with the profile tolerance, determining that the two-dimensional cam part product is qualified if the profile measurement result is within the profile tolerance range, and determining that the two-dimensional cam part product is unqualified if the profile measurement result is out of the profile tolerance range. The invention provides a two-dimensional cam part shape digital measurement method based on profile which can improve the measurement efficiency of cam shapes, make the measurement conclusion conform to the real allowance of cam profiles and facilitate rapid and accurate modification of processing procedures.

Description

technical field [0001] The invention belongs to the field of measurement, and relates to a digital measurement method, in particular to a contour-based two-dimensional cam type part surface digital measurement method. Background technique [0002] The general two-dimensional cam profile measurement technology mainly includes two methods: the standard part comparison measurement method and the cam profile point position measurement method based on the polar coordinate system. Among them, the comparison measurement method of standard parts needs to manufacture comparison standard parts and special measurement tooling, the production cost and cycle are longer, and the accuracy is lower; while the measurement result of the cam profile point position measurement method based on the polar coordinate system is a given polar angle The extreme radius deviation of the cam profile is not directly related to the cam profile allowance, and it changes with the curvature of the cam. The gr...

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Problems solved by technology

Among them, the comparison measurement method of standard parts needs to manufacture comparison standard parts and special measurement tooling, the production cost and cycle are longer, and the accuracy is lower; while the measurement result of the cam profile point position measurement method based on the polar coordinate system is a given polar angle The extreme radius deviation of the cam profile is not directly related to the cam profile allowance, and it changes with the curvature of the cam. The greater the curvature of the profile, the more the extreme radius deviation deviates from the actual state of the part allowance. The deviation result The distribution is discrete, the reference significance for machine adjustment is not great, and the measurement efficiency is low

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