面向自动数控编程的零件加工特征建模技术

从提高数控编程效率的实际出发,在改进传统的加工特征模型的基础上,提出了一种新的加工特征模型.该模型除具备一般加工特征模型的基本特性外,还包含工艺决策知识、数控程序模板等其他相关应用信息.通过该模型的使用,在设计数控工艺时就能依据特征的复杂程度,以模块化的方式分别采用检索式、变异式和智能创成型等设计方法辅助进行数控程序的生成,从而实现了数控程序的模块化设计,提高了数控工艺设计的柔性和自适应能力,为数控工艺的标准化、模块化和参数化奠定了基础.该方法在一个模型系统中得到了验征.

Modeling Technique of Machining Feature for Automatic Numeric Control Part Programming

Aiming at reducing period of numeric control part programming, a new machining feature model is proposed to remedy the drawbacks in the traditional feature models, which contains the common properties of general machining features as well as the associate information, such as manufacturing knowledge, the modular numeric control programs. Following the implementation of the modular numeric control programs, numeric control part programming is expected to flexibly perform. According to the complexity of parts, the search, variant and generative approaches can be selected and applied to the generation of numeric control programs with robustness and flexibility. The proposed scheme has been practically demonstrated by a prototype system.