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Analiza dokładności pięcioosiowej frezarki CNC z użyciem standardowego i zmodyfikowanego testu okrągłości

Wolny R.

Mechanik

2018

R. 91, nr 10

822-824

W analizie dokładności pięcioosiowej frezarki CNC wykorzystano system pomiarowy z teleskopowym prętem kinematycznym kulowym typu ball bar. Wykonano standardowy test pomiarowy. Zaproponowano zmodyfikowany test z zastosowaniem pochylonej podstawy badawczej. Porównano otrzymane wyniki. W sposób pośredni oceniono dokładność obrabiarki.

In analysis of accuracy of 5-axis CNC milling machine measuring system with telescopic kinematic ball bar was used. Standard measuring test was made. The modified test was proposed with application of investigated inclined basis. The obtained results were compared. The accuracy of machine tool in indirect way was evaluated.

Evaluation and representation of machine tool deformations

Archenti A., Osterlind T., Nicolescu C. M.

Journal of Machine Engineering

2011

Vol. 11, No. 4

105--117

This paper presents a novel test concept for the evaluation of the accuracy of NC machine tools. The evaluation of machine tools deformations is performed by help of a device similar to the double ball bar (DBB) with the difference that an adjustable load generated by the devic 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 are used to plot diagrams displaying characteristic 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 deviations, 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 that are caused by deflection.