IBM Systems Journal - 2002 Copyright

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IBM Journal of Research and Development  
Volume 11, Number 2, Page 150 (1972)
Nontopical Issue
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Numerical control for machining complex surfaces

by D. B. Almond
The art of machining complex, doubly curved surfaces has been advanced by experimental extensions to the Automatic Programmed Tool Language (APT) and its numerical control program. Described are mathematical programming procedures and language extensions for directing the cutting path of a machine tool over a ship's propeller, which serves as an example. Illustrative of an area for future development is the possible extension of interactively designed surfaces—using graphic displays—to interface with an APT processor.
Related Subjects: General Applications; Languages; Mathematical Methods