寸法測定値におよぼす表面あらさの影響(第2報)

測定端子が曲率を持つ場合

抄録

In this report accuracy of length measurement relating to the mechanical contact between spherical surface of feeler and the test piece is discussed.
In order to make clear these relations, displacement of a lapped disc tracing on the specimen is recorded by a roughness meter. And one more factor "reducing factor" is added to the profile factor suggested in the previous paper. The reducing factor means a ratio of the maximum height of the recorded envelope curve to the maximum height of the surface roughness. Introducing the reducing factor, reasonable length and distribution of the measured values can be known when measuring force and radius of curvature of the feeler and material of the test specimen are given.
And further the authors suggest that the radius of curvature of the spherical surface of skid used for recording envelope curve of the surface is more than about four thousands times the maximum height of surface roughness.