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research-article

SUSTAINED CAD/CAM INTEGRATION: INTEGRATING WITH SUCCESSIVE VERSIONS OF STEP OR IGES FILES

[+] Author and Article Information
Robert Kirkwood

University of Massachusetts Lowell 15 MacDonald Drive, Nashua, NH 03062
robert_kirkwood@student.uml.edu

James A. Sherwood

Department of Mechanical Engineering University of Massachusetts Lowell 1 University Avenue, Lowell MA 01854
james_sherwood@uml.edu

1Corresponding author.

ASME doi:10.1115/1.4040024 History: Received October 10, 2017; Revised February 17, 2018

Abstract

CAD/CAM/CAE integration offers designers, analysts, and manufacturers the opportunity to share data efficiently throughout the product development process. CAM for NC programming and tool design integrated with solid model data from CAD systems represents a large portion of the CAD/CAM/CAE domain. Sustained integration whereby successive changes to a CAD model are reintegrated with downstream applications is considered the most advanced and useful integration. Sustained integration is typically maintained when working in a homogeneous CAD/CAM environment. However, when working with applications that do not share a common environment (i.e., heterogeneous integration), sustained integration fails, and this lack of sustained integration can result in a loss of detailed information as a design progresses through the engineering design process. In the current paper, the authors discuss and demonstrate a novel approach to achieve sustained integration when working in heterogeneous CAD/CAM environments. After providing basic background information to establish a context, then discussing state-of-the-art and emerging solutions, the article discusses Virtual Persistent Identifiers as described via Design Change Vectors (VPI/DCV). A series of three case studies shows sustained integration based on neutral formats like STEP working as well as that observed in homogeneous environments. This novel approach demonstrates success as a generic solution using common export formats from current CAD systems and avoids the need to establish any new standards to achieve sustained integration. The paper finishes with a summary of observations learned from these case studies along with possible future research topics.

Copyright (c) 2018 by ASME
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