Abstract
This paper deals with geometric aspect of machined shapes and a machining process, which correspond directly to the machining process model. In order to make robust assignment rules of machining process, the working tool and operating step were introduced in the previous report. Moreover, to capture the essential information, the dimensions of operating step and working tool are also proposed as the parametric representation of them. However, it is necessary to consider the geometric representation of operating step and working tool, because the geometric information is used in feature extraction process from product model, and essential information of process plan are a tool shape and a tool path. In this paper, geometric model of working tool and operating step in three axis milling machine is discussed based on form shaping function. 16 classes of working tool are also proposed for the process planning.
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