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1988
Conference Paper
Title
Surface quality as a function of the static and dynamic machine tool behaviour in process.
Other Title
Oberflächenqualität als Funktion des statischen und dynamischen Maschinennachgiebigkeitsverhaltens während des Feinstzerspanprozesses
Abstract
Interferograms of flat workpiece surfaces demonstrate that vibrations in thecutting process can lead to insufficient surface quality. Consequently it is necessary to minimize these vibrations by optimizing the machining process. The examinations start with the analysis of ultraprecision machines. The static and dynamic compliance of several machine tools are listed and weakpoints of the machine are described by the modal analysis. A computerized model is generated to create synthetic interferograms and to find out the vibration frequencies, amplitudes and phase shifts in the cutting process. Insufficient surface modulations can also minimized by choosing appropriate technological parameters. This can be done mathematically. The calculation starts by estimating static and dynamic process forces. Computering the contact area in all three directions it is possible to describe the static and dynamic forces. In this way it will be possible to deduce measures which ensure a workpiece surface with minimized surface modulations. (IPT)