セグメント間の加減速運動に起因するマシニングセンタの直線補間工具経路の誤差推定(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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This paper proposes a practical approach to estimating the path errors produced by the NC acceleration/deceleration motions around connection points between every two segments for a linear interpolation cutter path of a machining center. The approach consists of two parts. The first is an experimental method to identify the value of each related parameter in NC appareture to the acceleration/deceleration motion control, in which only an operation is needed to measure a few simple motion trajectories with two linear segments with the machining center. The other part is a concise and efficient simulation algorithm based on the identification results for a cutter path composed of a number of short linear segments. A comparison result of the simulated cutter path trajectories with the measured ones and contours of machined work pieces sufficiently demonstrates the effectiveness and reliability of the proposed approach. Therefore, as a useful tool, the approach is applicable to beforehand estimating the influence of the NC acceleration/deceleration motions on cutter path accuracy or judging the cutting conditions for the machining purpose without performing an actual machining test with the machining center.
2010-10-25