机加工艺设计的三维新模式研究

摘要

Aiming at ambiguous expression and miscellaneous changes of process in machining process planning under 2D environment,a new process planning mode under Three-Dimensional（3D） environment was proposed in which 3D process model was taken as the carrier for process information.A closed-loop architecture including design,data management and on-site application feedback of 3D machining process was put forward.The constitution elements of 3D machining process planning were analyzed.The transformation method from machining process ontology to geometric modeling ontology and 3D annotation inheritance method were proposed.Therefore,3D procedure model could be obtained from process designer oriented to machining process knowledge directly.The composition structure of 3D machining process chart was studied.The mapping relationship between process expression elements and process chart elements in 3D machining process models were established to implement machining process planning under 3D environment.%针对传统二维机加工艺设计中工艺表达不直观、工艺更改繁琐等问题,研究了三维环境下机加工艺设计的新模式。提出了以三维机加工序模型作为工艺信息载体的思路,提出了包括三维机加工艺设计、三维机加工艺管理和三维机加工艺现场应用反馈的闭环体系结构。分析了三维环境下机加工序模型的组成元素,提出了机加工艺本体向三维几何建模本体转换的方法和三维工艺标注的继承方法,以辅助工艺员直接面向机加工艺知识生成三维工步与工序模型。研究了三维机加工艺卡片的组成结构,建立了三维机加工序模型中工艺表达元素与工艺卡片元素之间的映射关系。最终实现了三维环境下的机加工艺设计。