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Development of Five-Axis Controlled Tool Path Interpolation Method for Variant Shape Tools

Chihiro KUMAKAWA, Ken OKAMOTO and Koichi MORISHIGE

Proceedings of the 11th International Conference on Leading Edge Manufacturing in 21st Century (LEM21), OS03-13 (Kukuru Itoman, Okinawa, Japan, December 1-5, 2025)

In simultaneous five-axis controlled machining using variant shape tools with curved cutting edges, the positional relationship between the command point and the cutting point changes depending on the tool posture. Therefore, the machining accuracy cannot be ensured when using the tool center point (TCP) control, which is widely employed as an interpolation method for command points. A new tool path interpolation method that references cutting points has been proposed for simultaneous five-axis controlled machining with the oval-shaped tool, which is a type of variant shape tools. In this study, this method was extended to be applicable to other variant shape tools with curved cutting edges. Machining simulations were conducted for four types of variant shape tools. As a result, the effectiveness of the proposed method was confirmed, as the machining accuracy improved for all variant shape tools compared to TCP control.

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