Identification and Analysis of Linked SystemsDynamic Accuracy Proposal of a Measurement Approach and Instrumentation

• Autorzy: Dapero A. , Archenti A.
• Języki publikacji: EN

Abstrakty

EN

In this paper a measurement approach and instrumentation for capturing the dynamic stiffness of a linked system is proposed. The approach is based on the loaded double ball bar (LDBB) in combination with an integral dynamic shaker. The innovation is the introduction of a dynamic load besides the static one given by the LDBB and consequently able to extract the frequency response functions, taking advantage of the possibility of orienting the LDBB in different directions of the machine tool. The dynamic behaviour is studied through experimental modal analysis. The test conditions are therefore more similar to a cutting situation in which both a static and a dynamic component of force characterise the system. However, it must be underlined that the introduced dynamic force does not replicate the one arising in a cutting operation, but it is chosen instead for its spectrum characteristics, i.e. the energy introduced must equally cover a given range of frequencies. The test method is able to reveal machine tool characteristics not obtainable with existing methods, for instance the variation of dynamic stiffness in the working space. The paper will include some theoretical aspects on the approach as well as some experimental investigation.

Słowa kluczowe

EN

machining system; accuracy; dynamics; elastically linked system

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2015
• Tom: Vol. 15, No. 3
• Strony: 90--105
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Dapero A.

• Tetra Pak Italiana, Rubiera, Italy

autor

Archenti A.

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

Bibliografia

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• [2] ISO 230-4, ISO 230-4 Test code for machine tools Part 4: Circular tests for numerically controlled machine tools, ISO, 1996AKMEASE R., EASTHAM J., 1992, Design of permanent magnet at linear motors, IEEE Trans Magn, 28/5, 302-306.
• [3] NICOLESCU C.M., Analysis, identification and prediction of chatter in turning, PhD thesis, KTH Royal Institute of Technology, Stockholm, Sweden.
• [4] ARCHENTI A., 2011, A computational framework for control of machining system capability, PhD thesis, KTH Royal Institute of Technology, Stockholm, Sweden, ISBN 978-91-7501-162-2.
• [5] WECK M., 1984, Handbook of Machine Tools, Metrological Analysis and Performance Tests, 4, John Wiley & Sons.
• [6] ARCHENTI A., NICOLESCU M., 2013, Accuracy analysis of machine tools using Elastically Linked Systems, CIRP Annals - Manufacturing Technology, 62/1, 503-506.
• [7] CARLSSON U., 2009, Experimental Structure Dynamics, KTH Royal Institute of Technology, Stockholm, Sweden.
• [8] ISO Guide 98-3: Uncertainty of Measurement – Part 3: Guide to the expression of uncertainty in measurements (GUM: 1995