This paper proposes an evaluation method of a mechined shape with free-form surfaces and describes the basic way of thinking for the evaluation in which free-form surfaces are classified into a style surface and a function surface according to the application purpose. The evaluation items of a style surface and a function surface are determined as a unit normal vector and a positional vector respectively. The transformation from a designed shape to a machined shape is assumed as a model of a coordinate transformation, and the permitted transformations in the evaluations of a style surface and a function surface are clarified. The evaluation procedure based on the detection of positional vectors and unit normal vectors at sixteen arbitrary points on a patch of a machined surface is described in detail. In addition, the validity of the proposed evaluation method is examined by a computer simulation.
|ジャーナル||Journal of the Japan Society for Precision Engineering|
|出版ステータス||Published - 1991|
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