Evaluation and representation of machine tool deformations

• Autorzy: Archenti A. , Osterlind T. , Nicolescu C. M.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

machine tool; testing; deformation; static stiffness; circular test; loaded double ball bar

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2011
• Tom: Vol. 11, No. 4
• Strony: 105--117
• Opis fizyczny: Bibliogr. 8 poz., tab., rys.

Twórcy

autor

Archenti A.

• KTH Royal Institute of Technology, Production Engineering, Stockholm, Sweden

autor

Osterlind T.

• KTH Royal Institute of Technology, Production Engineering, Stockholm, Sweden

autor

Nicolescu C. M.

• KTH Royal Institute of Technology, Production Engineering, Stockholm, Sweden

Bibliografia

• [1] VON EULER-CHELPIN A., Information modelling for the manufacturing system life cycle, 1st ed. Stockholm, Sweden: KTH Royal Institute of Technology, 2008, PhD thesis.
• [2] ISO230-4, ISO 230-4 Test code for machine tools Part 4: Circular tests for numerically controlled machine tools.: ISO, 1996.
• [3] ANSI/ASMEB5.54-1992, Methods for performance, evaluation of computer numerically controlled machining centres.: ANSI/ASME, 1992, vol. reaffirmed 1998.
• [4] ARCHENTI A., Machining system testing – static and dynamic analysis. tockholm, Sweden: KTH Royal Institute of Technology, 2007.
• [5] KNAPP W., "Circular test for three-coordinate measuring machines and machine tools," Precision Engineering, 1983.
• [6] KAKINO Y., IHARA Y., SHINOHARA A., Accuracy inspection of NC machine tools by double ball bar method, 1st ed. Munchen, Germany: Carl Hanser Verlag, 1993.
• [7] HJELM S., "New test method for Industrial Robots and Numerical Controlled equipment," in ISR, vol. 33, 2002.
• [8] ARCHENTI A., A Computational Framework for Control of Machining systems Capability – From Formulation to Implementation. Stockholm, Sweden: KTH Royal Institute of Technology, 2011, PhD thesis.