夹具中接触力的计算

以无摩擦的点接触假设为前提，建立夹具中工件与定位元件和夹紧元件之间接触力计算模型，并针对欠定位、完全定位和过定位等不同的定位模式，讨论接触力的计算方法问题。利用提出的接触力计算模型可以检验工件夹紧的封闭性，并为定位元件和夹紧元件的结构设计提供理论指导。最后，给出一个事例验证导出的计算模型。

On computing of contact forces in fixtures

Assuming that the contacts are frictionless contacts, a computing model of contact forces between the workpiece and locators/clamps is formulated. The computing methods of contact forces for the under-deterministic positioning, deterministic positioning, and over-deterministic positioning are derived respectively. The proposed computing model of contact forces, which is verified by presented example, can be used to verify the form closure of fixturing, and to design locators and clamps.