An analysis Of Contemporary Methods For Measurement Of Form Errors Of Spherical Machine Parts

Abstract

Spherical elements constitute significant group of machine parts. In particular, they are commonly applied in bearing industry. Spherical elements should be usually manufactured very precisely and their form deviations are relatively small. Deviations of balls used in rolling bearings usually do not exceed 1 micrometer. The problem of accurate measurement of spherical parts is complicated and standards do not provide too many recommendations referring to this problem. The paper presents up-to-date solutions of the problem of measurements of spherical parts. It also presents the method of sphericity measurements developed at Kielce University of Technology. In addition, measurement strategies are presented that are based on developed method.

Accuracy Analysis of Milling Machine Based on Test Piece Machining and Measurement

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“…The term uncertainty is considered here as a measurement deviation. [2], [3] (1). The output is a combined measurement uncertainty consisting of these two uncertainties.…”