Tài liệu Geometric dimensioning and tolerancing for mechanical design ppt

[...]... MHBD031-Cogorno-v6.cls April 8, 2006 17:58 Source: Geometric Dimensioning and Tolerancing for Mechanical Design Chapter 1 Introduction to Geometric Dimensioning and Tolerancing For many in the manufacturing sector, geometric dimensioning and tolerancing (GD&T) is a new subject During World War II, the United States manufactured and shipped spare parts overseas for the war effort Many of these parts were made to... MHBD031-Cogorno-v6.cls April 8, 2006 18:6 Source: Geometric Dimensioning and Tolerancing for Mechanical Design Chapter 2 Dimensioning and Tolerancing Fundamentals Many people know how to design parts and make drawings, yet they lack the basic knowledge to produce engineering drawings that conform to industry standards Nonconforming drawings can be confusing, cause misunderstanding, and produce unacceptable parts This... to Geometric Dimensioning and Tolerancing 2 Chapter One Conventional tolerancing methods have been in use since the middle of the 1800s These methods do a good job of dimensioning and tolerancing size features and are still used in that capacity today, but they do a poor job of locating and orienting size features GD&T is used extensively for locating and orienting size features and for many other tolerancing. .. MHBD031-Cogorno-v6.cls April 18, 2006 15:58 Source: Geometric Dimensioning and Tolerancing for Mechanical Design Chapter 3 Symbols, Terms, and Rules Symbols, terms, and rules are the basics of geometric dimensioning and tolerancing (GD&T) They are the alphabet, the definitions, and the syntax of this language The GD&T practitioner must be very familiar with these symbols and know how to use them It is best to commit... April 8, 2006 18:6 Dimensioning and Tolerancing Fundamentals Dimensioning and Tolerancing Fundamentals 15 “CAUTION: If CAD/CAM database models are used and they do not include tolerances, then tolerance must be expressed outside of the database to reflect design requirements.” The most effective way to communicate design intent is through the proper use of geometric dimensioning and tolerancing Summary... Introduction to Geometric Dimensioning and Tolerancing 8 Chapter One Summary GD&T is a symbolic language used to specify the size, shape, form, orientation, and location of features on a part GD&T was created to insure the proper assembly of mating parts, to improve quality, and to reduce cost GD&T is a design tool GD&T communicates design intent This text is based on the standard Dimensioning and Tolerancing. .. Introduction to Geometric Dimensioning and Tolerancing Introduction to Geometric Dimensioning and Tolerancing 3 When Should GD&T Be Used? Many designers ask under what circumstances they should use GD&T Because GD&T was designed to position size features, the simplest answer is, locate all size features with GD&T controls Designers should tolerance parts with GD&T when Drawing delineation and interpretation... primarily for the learner who is new to the subject of geometric dimensioning and tolerancing (GD&T) The primary purpose of this book is to teach the graphic language of GD&T in a way that the learner can understand and use it in practical applications It is intended as a textbook to be used in colleges and universities and as a training manual for corporate training programs that teach engineering, design, ... is a design tool Before designers can properly apply geometric tolerancing, they must carefully consider the fit and function of each feature of every part GD&T, in effect, serves as a checklist to remind the designers to consider all aspects of each feature Properly applied geometric tolerancing insures that every part will assemble every time Geometric tolerancing allows the designers to specify the... proper way to specify units of measurement Demonstrate the proper way to specify dimensions and tolerances Interpret limits Explain the need for dimensioning and tolerancing on CAD/CAM database models Fundamental Drawing Rules Dimensioning and tolerancing shall clearly define engineering intent and shall conform to the following rules: 9 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) . 17:58 Chapter 1 Introduction to Geometric Dimensioning and Tolerancing For many in the manufacturing sector, geometric dimensioning and tolerancing (GD&T) is a new. to Geometric Dimensioning and Tolerancing P1: PBU introduction1 MHBD031-Cogorno-v6.cls April 8, 2006 17:58 Introduction to Geometric Dimensioning and Tolerancing