University of Maryland
CIM Lab collage

The Computer Integrated Manufacturing Laboratory is a constituent laboratory of the Institute for Systems Research at the University of Maryland.

Design Classification and Hybrid Variant-Generative Process Planning

This material is based upon work supported by the National Science Foundation under Grant Number 9713718. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

Principal Investigators:

Project Summary:

Developing successful generative process planners for complex machined parts is a difficult challenge. Although researchers have developed generative techniques for process selection, they have been less successful developing generative techniques for selecting the fixtures needed to complete the process plan. To address this problem, we are developing a new hybrid approach to process planning.

We believe that, in most cases, a generative planner is a better approach for creating a preliminary process plan. A variant approach is a very useful technique, however, for completing the process plan and adding the necessary details (like fixturing).

This research is developing a new hybrid approach that uses a successful generative process planning approach and adds a variant fixture planning approach. The fixture planning approach must identify designs and process plans that have fixtures that can hold the new design. We have developed an approach for defining a usefulness measure that explicitly reflects fixture usefulness. A specific example shows how one can use this approach to measure the usefulness of setups.

See also the web page describing our Design for Production research.

On-line papers based on this work:

Last updated on September 5, 2002, by Jeffrey W. Herrmann.