All mechanical designs pass through a series of formal and informal redesign steps, involving the analysis of functionality, manufacturability, cost and other life-cycle factors. The speed and e cacy of these steps has a major in uence on the lead time of the product from conceptualization to launching. In this paper we propose a methodology for automatically generating redesign suggestions for reducing setup costs for machined parts. Given an interpretation of the design as a collection of machinable features, our approach is to generate alternate machining features by making geometric changes to the original features, and add them to the feature set of the original part to create an extended feature set. The designer may provide restrictions on the design indicating the type and extent of modi cations allowed on certain faces and volumes, in which case all redesign suggestions generated by our approach honor those restrictions. By taking combinations of features from the extended feature set generated above, we can generate modi ed versions of the original design that still satisfy the designer's intent. By considering precedence constraints and approach directions for the machining operations as well as simple xturability constraints, we can estimate the setup time that will be required for each design. Any modi ed design whose setup time is less than that of the original design can be presented to the designer as a possible way to modify the original design. 0
Das et al. (1994 REF proposed a methodology that proposes redesign suggestions of less setup time than original designs.
Generating Redesign Suggestions To Reduce Setup Cost: A Step Towards Automated Redesign
COMPUTER-AIDED DESIGN
Computer Science