Loaded double ball bar for capability testing of NC machine tools
(English)In: Mechanical systems and signal processing, ISSN 0888-3270, E-ISSN 1096-1216Article in journal (Other academic) Submitted
This paper presents a novel test device for the evaluation of the accuracy of NC machine tools. The design concept is similar to a double ball bar (DBB) with the difference that an adjustable load generated by the device can be applied between spindle nose and machine tool table. This load eliminates the play existing in machine tool joints, thus reproducing the testing conditions that exist during machining. Collected data can be used to plot diagrams displaying important aspects of machine tool performance and a number of key figures such as static stiffness may be determined. The data can also be used for trend analysis; to predict any accuracy problems, and further to conduct preventive maintenance instead of emergency calls. The determined static behaviour could also be used to improve digital models for process simulations and compensation of errors caused by deflection.
Machine tool testing, loaded double ball bar, static stiffness, trend analysis
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-25881OAI: oai:DiVA.org:kth-25881DiVA: diva2:360401
QC 201011032010-11-032010-11-032010-11-03Bibliographically approved