Research Initiation: Automatic Design of Machining Fixturesfor Automatic Process Planning

由于夹具是特殊的工具，每个夹具通常用于制造一种类型的零件，因此在小批量生产的夹具的时间和成本在每个零件的基础上是过高的。在小批量生产的自动工艺计划的背景下，存在着对加工夹具的自动化设计的迫切需求。该项目旨在为以下夹具决策开发一种综合方法：概念设计、所需夹具的数量、每个夹具中的工件方向、夹持点和夹紧力。该方法将基于工程力学和夹具实践中使用的合理原则。前者用于确保正确的设计，后者用于夹具综合的高级指导。此外，还对零件几何进行了推理，为工艺设计与夹具设计的集成提供了依据。将使用知识系统工具开发一个原型系统。

Because fixtures are special tools in the sense that each is generally used for making one type of parts, the time and cost of fixturing for small-batch production are excessive on a per-part basis. A critical need is shown to exist for automating the design of machining fixtures in the context of automatic process planning for small-batch production. This project is directed towards the development of an integrated methodology for the following fixturing decisions: conceptual design, the number of fixtures needed, workpiece orientation in each fixture, fixturing points and clamping forces. The methodology will be based upon engineering mechanics and sound principles used in fixturing practice. The former is used to ensure proper design and the latter is used as high level guidance for fixture synthesis. In addition, the reasoning of part geometry is addressed, which provides a basis for the integration of process planning and fixture design. A prototype system will be developed using knowledge system tools.