Numerical analysis and experimental research on the accuracy decay of a ball screw with geometric errors under non-constant operating conditions

Abstract

The ball screw (BS) has become an indispensable key functional component in many fields, such as precision manufacturing equipment and intelligent manufacturing production lines. Inevitable geometric errors and non-constant operating conditions affect the accuracy decay of the BS component. In this paper, a numerical analysis method of this accuracy decay with geometric parameters errors, under non-constant operating conditions, is established. The accuracy degradation of the BS, under a single non-constant operation condition or multiple non-constant operating conditions, is analyzed, using a proposed numerical analysis method. The average value of the relative error between numerical analysis and theoretical model results was 5.52%, 5.66%, and 5.40%, under the three operating conditions of non-constant rotation rate (RR), non-constant contact load (CL), and non-constant rotation rate and contact load (RR + CL), respectively. And the maximum relative error value was 11.11%, 11.11%, and 10.98%. In addition, the numerical analysis method of BS accuracy degradation was compared to experimental tests. The average value of the relative error between numerical analysis outcome and experimental tests was 7.07%, 6.08%, 6.56%, and the maximum relative error value was 11.11%, 14.29%, and 13.04% under the three operating conditions of RR, CL, and RR + CL, respectively.

Measurement and identification method for geometric errors of the linear axis based on laser interferometer optimal measurement parameters method

“…2 From many scientific researches, the effect of geometric errors could not be ignored. 3,4 It’s an essential operation to measure and evaluate the geometric errors of linear axis. 5 Therefore, conducting an effective measurement operation is necessary for identification of geometric errors of linear axis and correlational geometric errors identification studies are received increased attention.…”