最小二乗法によるねじの幾何学的要素に関する評価

概要

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A method for estimating the geometrical elements of screw threads is proposed. This method is based on the method of least squares and enables to obtain unknown geometrical elements, namely a position and an attitude of a screw axis, a pitch, a flank angle, a taper angle and a pitch diameter, from measured coordinates values of screw surface. A screw thread being treated to be three-dimensional, the method also has a capability to estimate form deviations in addition to the above elements. According to experimental examinations on some thread plug gauges which are performed by using a coordinate measuring machine, the method shows an expected performance, giving good results in the estimations with respect to the geometry of the specimens. In particular, the method is considered to be available for automatic inspections of screw threads by means of coordinate measuring machines.
公益社団法人精密工学会の論文
1991-09-05