Improved Tool Positioning in 5-Axis Flank Milling by Simultaneous Perturbation Stochastic Approximation

This paper presents an improved tool positioning strategy in the 5-axis flank milling of a ruled surface by using simultaneous perturbation stochastic approximation (SPSA) techniques. The SPSA allows the near-global optimization of the machining error, even though the corresponding objective is not formulated as a closed-form representation. It adjusts all cutter locations of a tool path simultaneously, and reduces the induced deviation by not considering the CNC interpolation in the tool path planning. The resultant tool path produces a smaller error compared to the greedy approach that was adopted by several previous studies. This study provides a simple but systematic mechanism for machining error control in 5-axis flank milling.

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