文中根据数控刀具的设计特点 ,建立了基于实例推理的数控刀具智能化设计系统。该系统由数控刀具的实例库和建立在实例库基础上的编码匹配推理机制构成。实例库的建立采用编码对应设计参数的模式 ,从而避免了图形库的存储 ,既节约存储空间 ,又可以加快实例的匹配检索速度 According to the design features of NC tool, an intelligent design system of NC tool based on case reasoning is established. The system consists of an instance database of NC tools and a coding matching reasoning mechanism based on the instance library. The establishment of the instance library adopts the mode of encoding the corresponding design parameters, thereby avoiding the storage of the graphics library, not only saving the storage space, but also accelerating the matching retrieval speed of the instance