板材FMC中特征技术研究

An Investigation on the Feature Technique for Staet Metal FMC

机械设计CAD领域中,目前所采用的设计方法主要在于功能到形式的转换,设计决策时对产品生命周期中下游活动(包括工艺规划、制造、装置、测试、销售、服务、培训)的影响考虑较少.设计结果对下游活动的影响情况往往是在设计完成之后,进行下游活动时才得以发现.这样,增加了设计时间,而且由于设计阶段的信息不充分,设计决策的制定很难做到最优.因此,作者的目标是运用一种新的设计理论,使得从贯穿产品生命周期时各阶段中得到的约束信息能直接用于产生新的设计.并行工程的核心是建立一个统一的产品信息模型,它是信息的全集,既能满足设计的需要,又能满足加工和检验的需要,特征技术正是针对如何建立集成系统统一产品模型问题的一个卓有成效的探索。

The design thought of concurrent engineering lies in the constant consideration of the constraint of 'downstream' activity in all activities throughout the life cycle of a product so that the performance of activities over the life cycle of a product can be optimized. The key is the development of a feature model. The concept of the feature technique and its application in the automatic generating system of the sheet metal FMC operation control software are described. The method for developing the feature model and the general construction of the feature-based modelling system are presented. The feature model provides complete and rich product information, and offers the convenience of exchanging and sharing product data.