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An approximate method for generating draft on a free-form surface
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AI
DOI：10.1007/s003710050158.png)
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摘要
En 中文
When a CAD system is used to design a model manufactured by die casting, injection mould or another method, and the finished product is drawn out of a mould, it may be necessary to give the model draft. This paper presents a method for generating the draft on a free-form surface. An isocline curve and an isocline surface are first defined, then generated approximately. The approximate isocline surface, which becomes the draft on the free-form surface, is a ruled surface with a nonrational B-spline form.
Keyword:
CAD
CAM
modeling
draft
mould
isocline curve
isocline surface
B-spline
