GEOMETRIC DIMENSIONING AND TOLERANCING (GD&T) Based on ASME Y14.5M-1994 Standard Duration : 4 days Time : 9:00am 5:00pm Methodology : Instructor led Presentation, exercises and discussion Target : Individuals performing inspection, design, manufacturing and assembly. Understanding geometric dimensioning and tolerancing is essential for anyone reading blue prints. Important for academic instructors who conduct design and manufacturing related courses. Prerequisite : None. This course will mainly focus on theoretical fundamental knowledge. Objective : This short course introduces the concepts of size control and material tolerances. After defining terminology to be used, geometric characteristics and symbols, the course demonstrates how the geometric system works, using practical applications, blue-print reading and interpretation. The course covers application of position tolerance measurement and limits of size methods. Form tolerances for configurations such as flatness, straightness and roundness are discussed, and datum reference methods are covered in detail. Orientation tolerances are also discussed, for perpendicular, parallel and profile views of various items. Profile and position tolerances are covered, as are co-axial, symmetrical and concentric applications.
Day 1 Tolerancing in Engineering Drawing 1.0 Geometric Dimensioning and Tolerancing (GD&T). 1.1 An Overview to GD&T. 1.2 Engineering Drawings and Dimensioning. 1.3 The Dimensioning Standard. 1.4 The Rules of Fundamental Dimensioning. 1.5 The Coordinate Tolerancing System. 1.6 The Benefit of GD&T. 1.7 Comparison of GD&T and Coordinate Tolerancing. 1.8 Standard Comparison for ASME and ISO 1.8 Case Study: i. Preliminary Assessment of GD&T Understanding (Objective Quiz) ii. The Drawing Languages. GD&T Symbols and Term 2.0 Geometric Tolerancing Symbols and Terms. 2.1 The Features. 2.2 The Materials Conditions. 2.3 The Modifiers. 2.4 Radius and Controlled Radius. 2.5 Geometric Characteristics Symbols. 2.6 Feature Control Frame. 2.7 Case Study: i. Definition and Understanding of GD&T Symbols and Terms. ii. Using the GD&T Symbols and Terms in the Engineering Drawing. Rules and Concept of GD&T 3.0 The Rules and Concept of GD&T. 3.1 The Basic Dimensions. 3.2 Virtual Condition, Inner and Outer Boundary. 3.3 Maximum Material Condition (MMC) Virtual Condition. 3.4 Least Material Condition (LMC) Virtual Condition. 3.5 Regardless of Feature Size (RFS) Inner and Outer Boundary. 3.6 Multiple Virtual Condition. 3.7 The Bonus Tolerance. 3.8 Case Study: i. Using Proper GD&T with the Correct Rules and Concepts. ii. True and False of GD&T Annotation Methodology. Form Control 4.0 The Form Controls. 4.1 Flatness Control. 4.2 Flatness Control Rule. 4.3 Flatness Control Application. 4.4 Straightness as a Surface Element Control. 4.5 Straightness as a Surface Element Control Rule. 4.6 Straightness as an Axis or Center-plane Control. 4.7 Straightness as an Axis or Center-plane Control Rule. 4.8 The Control of Circularity. 4.9 The Control of Cylindricity. 4.10 Surface Roughness Standard 4.11 Roughness Measurement Techniques 4.12 Roughness Symbols 3.8 Case Study: i. Knowing How to Indicate the Proper Form Control in the Engineering Drawing. ii. Applying Form Control in Varies Type of Engineering Drawing.
Day 2 Planar Datum 5.0 The Planar Datum. 5.1 The Implied Datums Term and Terminology. 5.2 Using Planar Datums in GD&T. 5.3 Using Datum Targets. 5.4 Case Study: i. Specifying Planar Datum in Engineering Drawing ii. Specifying the Proper Type of Datum Target to Engineering Axis and Center-Plane Datum 6.0 The Concept of Axis and Center-Plane Datums. 6.1 Features of Size (FOS) Datum Features. 6.2 FOS Datum Feature Application. 6.3 FOS Datum Feature Referenced at Maximum Material Condition (MMC). 6.4 FOS Datum Feature Application. 6.5 Case Study: i. Specifying Axis and Center-Plane Datums in Engineering Drawing ii. Specifying the Datum Feature in Engineering Drawing Orientation Control 7.0 Orientation Controls Definition. 7.1 The Perpendicularity Control. 7.2 Indirect Perpendicularity Controls. 7.3 Legal Specification Test for a Perpendicularity Control. 7.4 The Study of Perpendicularity Control. 7.5 The Angularity Control. 7.6 Indirect Angularity Controls. 7.7 Legal Specification Test for an Angularity Control. 7.8 Legal Specification Test for an Angularity Control. 7.9 The Study of Angularity Control. 7.10 The Parallelism Control. 7.11 Indirect Parallelism Controls. 7.12 Parallelism with the Tangent Plane Modifier. 7.13 Legal Specification Test for a Parallelism Control. 7.14 The Study of Parallelism Control. 7.15 Case Study: i. Using Different Types of Orientation Control in Engineering Drawing ii. Specifying the Orientation Control Value in Engineering Drawing iii. Tolerance Calculation for Hole and Shaft Assembly with Orientation Control
Day 3 Tolerance of Position (TOP) 8.0 Position Tolerancing Definition. 8.1 An Overview of Tolerance of Position (TOP). 8.2 The TOP Theories. 8.3 The TOP Regardless of Feature Size (RFS) Applications. 8.4 The Study of TOP Applied at RFS. 8.5 The Common TOP MMC Applications. 8.6 The Study of TOP Applied at MMC. 8.8 The Special Applications of TOP. 8.9 The Calculations of TOP. 8.10 The Fixed and Floating Fastener Calculations. 8.11 TOP for Multiple Single Segment Control (10:15am-1:00pm) 8.12 TOP for Composite Control 8.13 TOP for Elongated Holes 8.14 TOP apply at Boundary 8.15 TOP with Different Datum applied 8.16 Implied 90deg and Basic Zero Theory 8.17 TOP with LMC Applications 8.18 Bi-directional TOP 8.19 Zero TOP Theory and Applications 8.20 Tolerance Stack Calculation for TOP 8.11 Case Study: i. Applying TOP with Proper Technique in Engineering Drawing ii. Calculating TOP in Engineering Drawing Concentricity and Symmetrical Controls 9.0 Concentricity and Symmetrical Controls Overview. 9.1 The Definition of Concentricity Control. 9.2 The Application of Concentricity. 9.3 The Comparison between Concentricity, Runout, and TOP (RFS). 9.4 The Study of Concentricity Control. 9.5 The Definition of Symmetrical Control. 9.6 The Application of Symmetrical Control. 9.7 The Comparison between Symmetrical and TOP (RFS). 9.8 The Study of Symmetrical Control. 9.9 Case Study: i. Using Concentricity Control in Engineering Drawing ii. Using Symmetry Control in Engineering Drawing
Day 4 Runout Controls 10.0 Runout Controls Overview 10.1 Definition of Circular Runout. 10.2 Establishing a Datum Axis for Runout. 10.3 Composite Control of Circular Runout. 10.4 The Application of Circular Runout. 10.5 Legal Specification Test for Circular Runout Control. 10.6 The Study of Circular Runout. 10.7 Definition of Total Runout. 10.8 Composite Control of Circular Runout. 10.9 The Application of Total Runout. 10.10 Legal Specification Test for Total Runout. 10.11 The Study of Total Runout. 10.12 The Comparison between Circular and Total Runout. 10.13 The Calculations of Runout. 10.14 Case Study: (10:15am-1:00pm) i. Calculating the Runout Tolerance in Engineering Drawing ii. Differentiating Between Circular and Total Runout and their Applications Profile Controls 11.0 Profile Controls Overview. 11.1 The Profile Terminology. 11.2 The Profile Tolerance Zones. 11.3 Advantages of Profile. 11.4 Profile Used to Tolerance a Surface Location. 11.5 Profile Used to Tolerance a Polygon 11.6 Profile Used to Tolerance a Conical Feature. 11.7 Profile Used to Tolerance Coplanar Surfaces. 11.8 Profile Used in Multiple Single-Segments Controls. 11.9 Legal Specification Test for Profile a Surface. 11.10 The Study of Profile of a Surface. 11.11 Profile of a Line for Form and Orientation Control. 11.12 Profile of a Line and Coordinate Tolerance for Form and Orientation Control. 11.13 Legal Specification Test for a Profile of a Line. 11.14 The Study of a Profile of a Line. 11.15 Part Calculation Using Profile. 11.16 Case Study: i. Using Various Type of Profile Controls in Engineering Drawing ii. Calculating Profile Tolerance in Engineering Drawing Limits and Fits 12.0 ANSI Limits and Fits Standard 12.1 Shrinkage Fits 12.2 The Application of ANSI Limits and Fits Tables 12.3 Hole Basis Fits 12.4 Shaft Basis Fits 12.5 Clearance Fits and Interference Fits GD&T Final Assessment Test