鋼球を用いた直角度測定法

概要

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This paper describes a handy measuring method of perpendicularity. The method applies two precise steel balls of which the diameters are slightly different, and uses a differential transformer with the stylus having neutral point. One smaller ball is fixed on the base plate and another larger ball is held perpendicularly above the smaller ball. The object to be measured traverses on the base plate toward the smaller ball and contacts with it. The larger ball is slightly displaced, then the perpendicularity is obtained from this displaced quantity. The main points of this method are as fellows : (1) The measuring time per an object is short (20-30 s). (2) The accuracy is comparably equal to the other measuring methods (3-4μm). Therfore the method will be suitable for perpendicular measurement of precise mechanical parts in mass production system when the form deviations of the plane are known.
公益社団法人精密工学会の論文
1985-04-05