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Influence of the positioning error of the machine tool working bodies caused by the backlash of the ball screw on the accuracy of manufacturing a part

Authors: Orlov Yu.M.
Published in issue: #11(52)/2020
DOI: 10.18698/2541-8009-2020-11-657


Category: Mechanical Engineering and Machine Science | Chapter: Machine Science, Drive Systems, and Machine Components

Keywords: determination of positioning error, positioning repeatability, ball screw backlash, drive accuracy of machine tools with numerical software, backlash, deviation from accuracy, linear movements
Published: 14.12.2020

The paper considers the influence of backlash arising in drives of metal-cutting machines on the positioning repeatability of the machine working bodies. The causes of backlash in machine tool drives are described when the ball screw moves in different directions. The deviation from the specified machining accuracy is calculated using the example of drilling holes in the workpiece. A method is described for optimizing the movements of drives of machine tools with ball screws without preload, taking into account the repeatability of their positioning. The formula is presented for calculating the positioning error in the case of operation of two axes with ball screws, options are presented for the possible deviation of the machine working bodies from the specified accuracy of manufacturing the part.


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