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表面形状为自由曲面零件的夹具设计是机械制造领域中的一个难点问题。但是，该类夹具的设计尚未引起广大夹具设计人员的充分注意，成功的设计范例也为数不多，这一现实已不能满足日益增长的自由曲面零件加工制造的要求。本文结合８６３／ＣＩＭＳ关键技术攻关项目“面向并行工程的计算机辅助夹具设计”的实践并加以扩展，重点讨论了该类夹具设计领域的零件装夹这一难点问题，并根据确定性定位理论与曲面理论给出了自由曲面零件上定位点的选取算法与夹紧点选取策略。
Fixture design with free-form surface components in the surface shape is a difficult issue in the field of machine construction. However, the design of this type of fixture has not yet attracted the full attention of the majority of fixture designers, successful design examples are few, this reality has been unable to meet the growing requirements of the manufacture of free-form surface components. This paper combines the practice of 863 / CIMS key project “computer-aided fixture design for concurrent engineering” practice and expands it, and discusses the difficult part of the fixture fixture design. According to the deterministic positioning theory and surface The theory gives the selection algorithm of the locating point and the strategy of selecting the clamping point on the free-form surface part.