Home | ADCATS Info | Search | Site Map | Bulletin Board | Reports & Publications | Bibliography | Contact Us

Manuals
AutoCAD 2D Verification:
Title Page
Home : Manuals : AutoCAD - Verification - Title  


ASSOCIATION FOR THE DEVELOPMENT OF COMPUTER-AIDED TOLERANCING SOFTWARE

 

Written by:
Dr. Kenneth W. Chase & Marvin J. Law

May 1, 1994

AutoCATS is a 2-D Computer-Aided Tolerancing System designed for AutoCAD. This system consists of two pieces of software: the AutoCATS 2-D Modeler and 2-D Analyzer. The AutoCATS 2-D Modeler allows designers to graphically create 2-D vector assembly models in AutoCAD. The AutoCATS 2-D Analyzer interactively assists designers in the selection and allocation of component tolerances for these assemblies in order to assure manufacturability, least cost, and minimum rejection rates.

With the AutoCATS 2-D Analyzer, vector models of 2-D mechanical assemblies created by the Modeler may be analyzed. The analysis may use worst case or statistical methods to predict the magnitude of variations and probable rejects for critical clearance, position, and other assembly specifications. Three sources of variation may be accounted for:

  1. Dimensional variations ( lengths and angles )
  2. Form and feature variations ( flatness, roundness, angularity, etc. )
  3. Kinematic variations ( small adjustments between mating parts )

In turn, the Analyzer may be used to allocate or select tolerances for an assembly to meet these same critical assembly specifications.

The AutoCATS 2-D Analyzer user interface is menu-driven with on-line help, command buffering, and global commands available at every menu. It features full-screen data editing and the ability to save design iteration data.

This manual provides the beginning and experienced users of CATS a set of practical sample problems to use as examples of how to make valid vector models of assemblies. Each assembly has been modeled and the solutions verified using a spreadsheet program. The chapters also contain text pointing out many of the modeling and analysis issues pertinant to each problem.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. Printed in the United States of America, Brigham Young University.

Addition copies of this manual may be purchased for $15 click on "contact us" at bottom to request a copy.

AutoCAD is a registered trademark of Autodesk, Inc.


 PRO-E 2 D
Modeler:
Title | Overview | Modeling | Commands
Analyzer:
Title | Overview | Analysis | Allocation | Interface
Verification: Overview

 AutoCAD 2 D
Modeler:
Title | Overview | Modeling | Commands
Analyzer: Title | Overview | Analysis | Allocation | Interface
Verification: Title | Overview

 Catia 3 D
Modeler:
Title | Overview | Modeling | Commands | Building a Tolerance Model

The ADCATS site: Home | ADCATS Info | Search | Site Map | Bulletin Board | Reports & Publications | Bibliography | Contact Us