Engineering documentation for CAD/CAM applications PDF
Preview Engineering documentation for CAD/CAM applications
ENGINEERING DOCUMENTATION FOR CAD/CAM APPLICATIONS MECHANICAL ENGINEERING A Series of Textbooks and Reference Books EDITORS L. L. FAULKNER S. B. MENK.ES Department of Mechanical Engineering Department of Mechanical Engineering The Ohio State University The City College of the Columbus, Ohio City University of New York New York, New York 1. Spring Designer's Handbook, by Harold Carlson 2. Computer-Aided Graphics and Design, by Daniel L. Ryan 3. Lubrication Fundamentals, by J. George Wills 4. Solar Engineering for Domestic Buildings, by William A. Himmelman 5. Applied Engineering Mechanics: Statics and Dynamics, by G. Boothroyd and C. Poli 6. Centrifugal Pump Clinic, by Igor J. Karassik 7. Computer-Aided Kinetics for Machine Design, by Daniel L. Ryan 8. Plastics Products Design Handbook, Part A: Materials and Components; Part B: Processes and Design for Processes, edited by Edward Miller 9. Turbomachinery: Basic Theory and Applications, by Earl Logan, Jr. 10. Vibrations of Shells and Plates, by Werner Soedel 11. Flat and Corrugated Diaphragm Design Handbook, by Mario Di Giovanni 12. Practical Stress Analysis in Engineering Design, by Alexander Blake 13. An Introduction to the Design and Behavior of Bolted Joints, by John H. Bickford 14. Optimal Engineering Design: Principles and Applications, by James N. Siddall 15. Spring Manufacturing Handbook, by Harold Carlson I 6. Industrial Noise Control: Fundamentals and Applications, edited by Lewis H. Bell 17. Gears and Their Vibration: A Basic Approach to Understanding Gear Noise, by J. Derek Smith 18. Chains for Power Transmission and Material Handling: Design and Applications Handbook, by the American Chain Association 19. Corrosion and Corrosion Protection Handbook, edited by Philip A. Schweitzer 20. Gear Drive Systems: Design and Application, by Peter Lynwander 21. Controllin5 In-Plant Airborne Contaminants: Systems Design and Calculations, by John D. Constance 22. CAD/CAM Systems Planning and Implementation, by Charles S. Knox 23. Probabilistic Engineering Design: Principles and Applications, by James N. Siddall 24. Traction Drives: Selection and Application, by Frederick W. Heilich III and Eugene E. Shube 25. Finite Element Methods: An Introduction, by Ronald L. Huston and Chris E. Passerello 26. Mechanical Fastening of Plastics: An Engineering Handbook, by Brayton Lincoln, Kenneth J. Gomes, and James F. Braden 27. Lubrication in Practice, Second Edition, edited by W. S. Robertson 28. Principles of Automated Drafting, by Daniel L. Ryan 29. Practical Seal Design, edited by Leonard J. Martini 30. Engineering Documentation for CAD/CAM Applications, by Charles S. Knox OTHER VOLUMES IN PREPARATION ENGINEERING DOCUMENTATION FOR CAD/CAM APPLICATIONS CHARLES S. KNOX Knox Consulting Services St. Paul, Minnesota MARCEL DEKKER, INC. New York• Basel Library of Congess Cataloging in Publication Data Knox, Charles S., [date] Engineering documentation for CAD/CAM Applications. (Mechanical engineering : 30) Includes index. 1. CAD/CAM applications--Documentation. I. Title. II. Series. TS155.6.K67 1984 620'.0043'02854 84-1773 ISBN 0-824 7-7089-7 Copyright © 1984 by MARCEL DEKKER, INC. ALL RIGHTS RESERVED Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, micro-filming, and recording, or by any information storage and retrieval system, without permission in writing from the publisher. MARCEL DEKKER, INC. 270 Madison Avenue, New York, New York 10016 Current printing (last digit): 10 9 8 7 6 5 4 3 2 PRINTED IN THE UNITED STATES OF AMERICA To my two sons,David Stuart and Gary Sinclair, with love and respect PREFACE The purpose of this book is to emphasize to engineering, manufacturing, and account- ing the importance of consistent, well-planned, and computer-oriented engineering documentation systems. That such systems are needed to optimize flow of information and to increase the efficiency of modern CAD/CAM systems will become apparent as their interrelationships are discussed. Too many times engineering departments give little thought to the documentation and communication requirements of other departments. Thus, this book emphasizes and explains a set of principles and pro- cedures needed to improve these requirements. The word "flow" conveys an important concept when used with engineering doc- umentation. Engineers consider their main task to be designing "things." Too little time and effort has been spent by them to streamline methods for conveying the data they generate which "flows" from engineering through manufacturing to accounting. By "flow" we mean the means by which engineering drawings, their associated data, bills of material, engineering changes, part number or revision level changes, parts lists, and geometry are documented and disseminated to all other departments. With the advent of CAD/CAM and the emphasis on integrated computer systems, which now also include new data such as design geometry, the need for a more con- sistent flow path has become mandatory. After all the segments of engineering docu- mentation have been discussed, the actual flow of data will be described so the reader can sense the reasons for each of these segments and their importance. Some of the subjects we will cover include a simple part number system which conforms to rules of interchangeability and configuration management, piece part drawings for flexibility of design retrieval and manufacturing planning, design retrieval to minimize the proliferation of new designs, a mechanized parts list and bill of ma- terial for communication and integration of planning data with manufacturing sys- tems, product structures for conveying manufacturing assembly requirements, and modular design to minimize customizing bills of material for each new order. Of course, many companies have well-documented systems which operate effi- ciently today. For those companies, this book will serve to confirm their philosophies. Many more, however, do not have efficient engineering documentation systems. Long part numbers with obsolete or unimportant significance, multiple parts on one draw- ing, customer job cost control, and many more inefficient and wasteful systems still exist. This book will help those companies who have such problems to prepare plans V
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