Application of spindle speed variation for chatter suppression in turning

In the present paper the chatter instability of variable speed machining is studied. Though, there exist numerical methods for the computation of the stability lobes for variable speed machining, especially in turning processes the potential of an active spindle speed variation for chatter suppression is mostly unexploited. In the case of a slowly time-varying spindle speed, which is practicable on a real machine tool, the stability behavior with a time-varying spindle speed is connected to the stability behavior with constant spindle speeds. This so-called frozen time approximation helps to understand the stabilizing mechanism of turning with spindle speed variation. Strategies for tuning the parameters of the speed variation for an optimal stabilization are developed. The results presented here are useful for a practical implementation of variable speed machining to increase the productivity without any negative effect due to the variation of the spindle speed.

[1]  O. Daněk,et al.  Selbsterregte Schwingungen : An Werkzeugmaschinen , 1962 .

[2]  Alpay Yilmaz,et al.  Machine-Tool Chatter Suppression by Multi-Level Random Spindle Speed Variation , 1999, Manufacturing Science and Engineering.

[3]  Jokin Munoa,et al.  Stability of milling processes with continuous spindle speed variation: Analysis in the frequency and time domains, and experimental correlation , 2008 .

[4]  Gilles Dessein,et al.  On the stability of high-speed milling with spindle speed variation , 2010 .

[5]  Gábor Stépán,et al.  Stability Analysis of Turning With Periodic Spindle Speed Modulation Via Semidiscretization , 2004 .

[6]  L. Uriarte,et al.  Continuous workpiece speed variation (CWSV): Model based practical application to avoid chatter in grinding , 2009 .

[7]  Richard E. DeVor,et al.  Analytical Stability Analysis of Variable Spindle Speed Machining , 2000 .

[8]  Soo Hun Lee,et al.  Programming spindle speed variation for machine tool chatter suppression , 2003 .

[9]  Günter Radons,et al.  Stability Analysis of Machining with Spindle Speed Variation , 2011 .

[10]  Gábor Stépán,et al.  Semi‐discretization method for delayed systems , 2002 .

[11]  Philippe Lorong,et al.  Dynamic Study of Thin Wall Part Turning , 2011 .

[12]  Eckehard Schöll,et al.  Some basic remarks on eigenmode expansions of time-delay dynamics , 2007 .

[13]  Wim Michiels,et al.  Stabilization of time-delay systems with a Controlled time-varying delay and applications , 2005, IEEE Transactions on Automatic Control.

[14]  Tamás Insperger,et al.  Analysis of directional factors in milling: importance of multi-frequency calculation and of the inclusion of the effect of the helix angle , 2010 .

[15]  L. N. López de Lacalle,et al.  An automatic spindle speed selection strategy to obtain stability in high-speed milling , 2009 .

[16]  Stephen Albert Tobias.  Schwingungen an Werkzeugmaschinen , 1961 .