Feedrate Scheduling Strategies for Free-Form Surfaces(Analytical advancement of machining process)

概要

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Free-form surface machining is one of the commonly used manufacturing processes for several industries. It is critical, but often difficult, to select applicable cutting conditions to achieve high productivity while maintaining high quality of parts. The common approach used in feedrate scheduling is material removal rate (MRR) model. In this approach, feedrate is proportional to either average or instantaneous volumetric material removal rate. Commonly used CAD/CAM programs and NC code generators based on only the geometric and volumetric analysis, but they do not include the physics of the process yet. The second approach that is also introduced and analyzed is based on the mechanics of the process. In this approach, feedrate is set to values which keep instantaneous cutting forces to prescribed values. In this paper, essentially both volumetric (MRR) and force based feedrate scheduling strategies are compared theoretically and experimentally for ball-end milling. It is shown that rather than MRR based strategy, force based mechanical modeling strategy is much better for determining the optimum feedrate scheduling.
一般社団法人日本機械学会の論文
2005-10-18