Case study: A comparison of error sources in high-speed milling

This paper describes a case study devised to quantify the relative contributions of geometric, thermal, contouring, and cutting force errors to machined part dimensional errors. Measurements were performed to independently evaluate the: (1) quasi-static geometric errors using the laser ball bar; (2) variations in geometric errors due to thermal effects; (3) spindle thermal growth errors using a capacitance gage nest; (4) two-dimensional contouring errors using a grid plate encoder; and (5) surface location error due to (stable) forced vibrations during cutting. The effects of the first three error components were related to part dimensions using a homogeneous transformation matrix approach integrated into a Monte Carlo simulation. A comparison of the individual influences of these error sources showed that the cutting force error was dominant for the high-speed machining center/tool-holder combination selected for this study.

[1]  T. Willis,et al.  Book Reviews : DESIGN OF MACHINE ELEMENTS Fifth Edition M. F. Spotts Prentice Hall, Inc., Englewood Cliffs, NJ, 1978 , 1979 .

[2]  A. Slocum,et al.  Precision Machine Design , 1992 .

[3]  Narayan Srinivasa,et al.  Spindle thermal drift measurement using the laser ball bar , 1996 .

[4]  John W. Sutherland,et al.  An Improved Method for Cutting Force and Surface Error Prediction in Flexible End Milling Systems , 1986 .

[5]  S. Smith,et al.  An Overview of Modeling and Simulation of the Milling Process , 1991 .

[6]  W. Kline,et al.  The Prediction of Surface Accuracy in End Milling , 1982 .

[7]  Robert I. King,et al.  Handbook of High-Speed Machining Technology , 1986 .

[8]  James B. Bryan,et al.  International Status of Thermal Error Research (1990) , 1990 .

[9]  Yusuf Altintas,et al.  Dynamic peripheral milling of flexible structures , 1992 .

[10]  T. Schmitz,et al.  Closed-form solutions for surface location error in milling , 2006 .

[11]  B. Mann,et al.  Limit cycles, bifurcations, and accuracy of the milling process , 2004 .

[12]  Tony L. Schmitz,et al.  Examination of surface location error due to phasing of cutter vibrations , 1999 .

[13]  John C. Ziegert,et al.  The laser ball bar: a new instrument for machine tool metrology , 1994 .

[14]  Richard E. DeVor,et al.  The prediction of cutting forces in end milling with application to cornering cuts , 1982 .

[15]  Yusuf Altintas,et al.  Mechanism of Cutting Force and Surface Generation in Dynamic Milling , 1991 .

[16]  F. Koenigsberger,et al.  Testing Machine Tools: For the Use of Machine Tool Makers, Users, Inspectors and Plant Engineers , 1978 .