MF3502 Geometric Dimensioning and Tolerancing Syllabus:
MF3502 Geometric Dimensioning and Tolerancing Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
The main learning objective of this course is to prepare students for:
• A variety of symbols that are used on design drawings to replace words
• Types of geometric controls and what they are used to control.
• What a datum and a datum feature are and why they are chosen.
• How to convert from plus and minus tolerancing to geometric tolerancing
• How to measure MMC and LMC
• How to apply geometric tolerances of flatness, perpendicularity and position in sequence
UNIT I INTRODUCTION
Geometric product definition principles – verification of position with open setup- geometric characteristic symbols Geometric Dimensioning and Tolerancing – an explanation of tolerance zone conversion- surfaces, features, features of size, datum features, datum features of size, and datum’stolerances- components common to geometrically dimensioned & toleranced drawing- fits & allowances- advantages of GD&T.
UNIT II MATERIAL CONDITION & SIZE CONTROL FORM
Material Condition: MMC, LMC & RFS: Maximum Material Condition (meaning & use) – Least Material Condition (meaning & use) – Regardless of Feature Size – Feature Control Frame. Size Control Form: The Taylors principle- Gauging size limits- Rules- concepts- Characteristics- and Untoleranced Dimensions- individual or related Datum’s- Material Conditions- untoleranced dimensions.
UNIT III DATUMS
Datum features- oddly configured & curved surfaces as datum features- equalizing datum’s- datum feature symbols- flexible parts- direct vs indirect tolerancing- MMC and its ramifications- Relations between individual features- Virtual Condition and Resultant condition Boundaries- Virtual condition (MMC concept & a functional boundary)- Effect of LMC- wall thickness calculation.
UNIT IV DATUM FEATURE OF SIZE REPRESENTATION
Modes of datum feature representation- angular orientation- Form Controls: flatness- straightness Cylindricity – circularity- Spherical Diameters Controlled with circularity – Orientation Controls: Parallelism – perpendicularity – angularity- Profile Control: Profile of a Surface- Profile of a LineComposite Profile – Conicity – Run out: circular – total – concentricity- symmetry- position. A Logical Approach to part Tolerancing Dimensioning and Tolerancing Schemes Steps for the Development of a Dimensional Inspection Plan Paper Gauging and Functional Gauging
UNIT V TOLERANCE STACK-UP ANALYSIS
Fixed Fastener Assembly – Floating Fastener Assembly -Tolerance Stack-Up Analysis – Rules – Calculating Gaps- Working the Route -Calculating Inner and Outer Boundary Means and Their Tolerances – Statistical Tolerances.
TOTAL : 60 PERIODS
COURSE OUTCOMES:
Upon completion of this course, the students will be able to:
1. Contrast between conventional and GD&T tolerance zones
2. Assign a variety of symbols that are used on design drawings to replace words
3. Explain MMC, LMC and RFS concepts
4. Apply different types of geometric controls
5. Ability to choose proper datum and a datum feature
6. Ability to convert from plus and minus tolerancing to geometric tolerancing
7. Assess the significance of selection of datum & datum features
8. Ability to apply Point out form, orientation, profile, runout and orientation controls
TEXT BOOKS:
1. James D. Meadows Geometric Dimensioning and Tolerancing – Applications, Analysis & Measurement [per ASME Y14.5-2009] James D. Meadows & Assoc inc, ISBN: 0- 9714401-6-6. 2. Bryan R. Fischer, Mechanical tolerance stack up and analysis, Marcel Dekker, 2004 – Technology & Engineering
REFERENCES:
1. Robert G. Campbell, Edward S.Roth, “Integrated product design and Manufacturing using Geometric Dimensioning & Tolerancing” Marcel Dekker,Inc,New York.Basel,ISBN:0-8247-8890-7.
2. G. Henzold, Geometrical dimensioning and tolerancing for design, manufacturing and inspection, Butterworth-Heinemann, 2006.
3. Gene R. Cogorno, Geometric dimensioning and tolerancing for mechanical design, McGraw-Hll, 2006.
4. James D Meadows, “Geometric Dimensioning and Tolerancing”, Marcel Dekker, Inc
5. James D Meadows, “Measurement of Geometric Tolerances in Manufacturing” Marcel Dekker, Inc
6. P S Gill, “Geometric Dimensioning and Tolerancing”, S K Kataria & sons, 2005-6