Nc machine tools as an automation equipment is being more and more widely adopted, and CNC programming technology is a comprehensive, practical and door set flexibility in a body specialized courses. China manufacturing industry is facing market globalization and economic integration trend, nowadays at a competitive strategy escalated, corresponding manufacturing idea and manufacturing mode innovation period. Therefore, in the numerical control technology are introduced a lot of computer, and nc machining, CAD/CAM is supporting the modern manufacturing base. CAD referred computer aided design, it helps people from tedious manual drawing freed, realize the paperless, no pen, no ruler, without drawing design, not only for simple drawings of workpiece efficiency, but also to the accuracy and efficiency of complex workpiece is very high also, and is also advantageous in drawings of the systematic management.
Key words: surveying and mapping, complex curved surface