Automatic machining of 2·5D components with the ACIS modeller

The full automation of the planning and control code generation for the NC machining of complex components is a commendable aim. Progress has been hindered by the lack of modeller systems capable of storing and providing access to a full product model. The ACIS modeller provides improved geometric modelling functionality, access to data structures and model attribute attachment mechanisms. This paper describes the first attempts to use the modeller to automate the planning and machining process. Initial strategies and algorithms are described and demonstrated. These cover: component validation; workpiece holding, including the use of vices, bolting and clamping; and the stability of the secured workpiece.