在产品的最初设计阶段 ,首先把所需的装配功能公差分配给各有关零件的相关尺寸 ,然后把这些尺寸表示为工序尺寸 ,利用工序公差链 ,将产品的功能公差直接表示为工序公差。通过建立并求解优化模型 ,可实现工序公差的并行优化设计 ,最后给出了一个工程实例。 In the initial design phase of the product, the required assembly tolerances are first assigned to the relevant dimensions of the respective part, which are then expressed as process dimensions. The process tolerance chain is used to express the functional tolerance of the product directly as a process tolerance. By establishing and solving the optimization model, parallel optimization of process tolerance can be achieved. Finally, an engineering example is given.