Development of a Device for Measurement of the Deviations of the Form and Roughness of the Surfaces of Ultra-Precise Parts

Evaluation of the Calculated Sizes Based on the Neural Network Regression

“…Owing to the fact that the absolute sizes between the sampling points in the cylinder's profile and the rotary axis of the worktable should be measured for the realization of precision measurement of the calculated sizes, although ISO 14405-1 was issued by ISO (International Standardization Organization), there have been no suitable products of precision cylindrical coordinate measuring machine (C 2 M 2 ) at present, and the standard can not be implemented in the real production. On the other hand, the roundness error of cylinder can be measured by using precision cylindricity or roundness measuring instruments [2][3][4][5][6], which can be seen as a like cylindrical coordinate measuring machine (Like-C 2 M 2 ) in this paper. Owing to that the variations of the sampling points in the extracted roundness profile [7][8][9][10] by using Like-C 2 M 2 are the relative radial sizes, the roundness error or cylindricity error can be evaluated based on the pseudo roundness profile, the pseudo radial sizes of which are equal to the sum values of the radial variations of the sampling points and a radius of a virtual ideal cylinder.…”

Spectral Parameters of Straightness Deviation Evaluation

“…Form deviations are one of main characteristics defining geometric precision of parts [1][2][3][4][5][6]. The majority of cases implements the complex indices of form deviation, and the conclusion on part acceptability is made by means of comparison of value of largest straightness deviation and the tolerance.…”