Method for achieving multi-station measurement element calculation through coordinate measuring machine

Abstract

The invention relates to the technical field of mechanical detection and particularly relates to a method for achieving multi-station measurement element calculation through a coordinate measuring machine. According to the method, the principles of multi-direction detection, unchangeable spherical center relative position and 6-point location are used, and a public coordinate system establishing method is used, accordingly, the problem of calculation of size and shape position tolerance among elements measured by coordinate parts in different stations is solved, the problem that parts exceeding measuring machine stroke cannot be detected on the coordinate and need to select larger-stroke coordinate is solved.

Description

technical field [0001] The invention relates to the technical field of mechanical detection, in particular to a method for realizing calculation of multi-station measurement elements by using a three-coordinate measuring machine. Background technique [0002] As the testing equipment with the highest degree of automation and the widest measurement range in the mechanical testing industry, the three-coordinate measuring machine has been widely used in machinery, electronics, instrumentation, plastics and other industries. However, when testing parts, the three-coordinate measuring machine can only calculate the size and shape and position tolerances of the elements measured at one station, that is, one installation. In actual work, there are many parts on which the measurement elements on multiple surfaces need to calculate the size or shape tolerance, but these elements cannot be detected in one installation, and the elements measured under multiple clamping Because of the ...

AI Technical Summary

Problems solved by technology

However, when inspecting parts, the three-coordinate measuring machine can only calculate the size and shape tolerance of the elements measured at one station, that is, under one installation.

In actual work, there are many parts on which the measurement elements on multiple surfaces need to calculate the size or shape tolerance, but these elements cannot be detected in one installation, and the elements measured under multiple clamping Because of the change of position, it is impossible to calculate and evaluate each other

E.g Figure 1-3 For the part shown, the holes φB and φC in the inner cavity of the part have coaxiality requirements with the outer circle φA on the part, but the parts such as Figure 4 When placing, due to the limitation of the length of the probe, the two holes in the inner cavity cannot be detected, only the outer circle φA can be detected; if the part is placed as Figure 5 If placed, you can take advantage of the large moving range of the Z-axis of the measuring machine to detect the holes φB and φC in the inner cavity, but the outer circle φA cannot be detected.

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