Detc 99 / Dac - 8561 Automated Methods in Computer Aided Design
نویسنده
چکیده
A numerical variational method is herein introduced for the automatic redesign of mechanical parts subject to a design change. This method is demonstrated to the design of mechanical parts in the context of concurrent engineering of 3D parts. Relations between dimensions in a mechanical part as dictated by a designer are modeled using mechanisms and their kinematic relations. Variational cut-joint constraints are introduced, kinematic joints in the formulation are combined, and a Jacobian is determined. Constraint violations are then compensated to compute an assembled mechanism, hence redesigning the part. It is shown that this formulation is broadly applicable to 2D and 3D models. The method and algorithm are illustrated through examples. 1. INTRODUCTION Commercial computer aided design and manufacturing (CAD/CAM) computer code have provided versatile venues for end-users to automate the design process. Despite recent advances, the sophistication of these formulations remains at an early stage of development. Learning and creating new methods and methodologies for computers to provide more aid to the designer is a goal worth hundreds of millions of dollars to the world economy. The goal is to automate the product development process within the mechanical CAD/CAM environment.
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تاریخ انتشار 1999