Accurate identification and compensation of geometric errors of 5-axis CNC machine tools using double ball bar. (30th March 2016)

• Record Type: Journal Article
• Authors: Lasemi, Ali; Xue, Deyi; Gu, Peihua
• Is Part Of: Measurement science & technology. Volume 27:Number 5(2016:May)
• Publication Date: 2016-03-30
• Subjects: five-axis CNC machine tools -- geometric errors -- sensitivity analysis -- error compensation -- double ball bar; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/0957-0233/27/5/055004
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: Five-axis CNC machine tools are widely used in manufacturing of parts with free-form surfaces. Geometric errors of machine tools have significant effects on the quality of manufactured parts. This research focuses on development of a new method to accurately identify geometric errors of 5-axis CNC machines, especially the errors due to rotary axes, using the magnetic double ball bar. A theoretical model for identification of geometric errors is provided. In this model, both position-independent errors and position-dependent errors are considered as the error sources. This model is simplified by identification and removal of the correlated and insignificant error sources of the machine. Insignificant error sources are identified using the sensitivity analysis technique. Simulation results reveal that the simplified error identification model can result in more accurate estimations of the error parameters. Experiments on a 5-axis CNC machine tool also demonstrate significant reduction in the volumetric error after error compensation.