Abstract
This study describes a method to determine a 5-axis tool path in a CNC machine tool. In general, the tool path is determined by two steps: main and post processor. First, positions and postures of the tool are determined in the main processor. After that, travel amount of each axis is calculated based on form shaping theory in the post processor. Therefore, it is difficult to determine especially tool postures considering the axis travel amount in the conventional CAM. In order to solve this problem, this study proposes extended C-space, which is generated from form shaping surfaces defined by the form shaping function analogically, and several strategical constraints can be added to the axis travel amount. This paper describes two strategies as implementation examples of extended C-space. One is minimization strategy of angle change in rotation axes, and the other is minimization strategy of power consumption in all axes. Finally, these effectiveness are confirmed by machining.
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