ENGINEERING TOOLS & METHODS
• Requirements and categories of a feature of size • Identifying and interpreting a complete, interrupted, partial, and bounded feature of size Applicable Drawing Standards • Determining on which standards an engineering drawing is based • Clarifying a drawing when no dimensioning standard is referenced • Reducing confusion on dimensioning standards Drawing Interpretation • Interpreting an engineering drawing • Drawing title block, revision column, general drawing notes • Fundamental rules that affect drawing interpretation • Surface coating and heat treat • Geometric controls and a valid datum system • Misconceptions on measuring parts that use the datum system • Controlling characteristics for each part feature • Proper uses for coordinate tolerancing • Specification / interpretation
• Describe uses, advantages, misconceptions, and common errors of the datum system • List nine common datum feature types • Describe advanced datum target concepts • Explain how to specify / interpret specialized datum feature applications • Describe modifier usage in tolerance of position applications • Describe the effects of simultaneous and separate requirements with tolerance of position • Explain composite position tolerancing and multiple single- segment position tolerancing • Interpret tolerance of position applications with a conical tolerance zone • Explain composite profile tolerancing and multiple single- This course is valuable for individuals who create or interpret engineering drawings, product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/ professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals. Prerequisites Please be aware that this is not an introductory course. In order to understand the course content, students should have completed Fundamentals of GD&T course or equivalent. segment profile tolerancing • Describe profile applications Who Should Attend
Using Substandard Drawings • Categories of substandard drawing specifications • Steps for dealing with substandard drawings • Things not to do when using a substandard drawing
Rigid/Non-Rigid Parts Definitions • Free state • Restrained state • Rigid part • Non-rigid part and part feature
Topical Outline GD&T Fundamentals Review • GD&T skills survey • GD&T fundamentals for further study Importance of Product Design • Product design effects on costs • Consequences of drawing errors • Advantages of GD&T
Tolerancing Non-Rigid Parts • Tolerancing a non-rigid (restrained) part • Roles of a restraint note • Determining restraining conditions on non-rigid parts • Requirements that need to be addressed in a restraint note • The difference between a general note and a local restraint note • When a free state symbol should be used • Areas that need special attention when inspecting a non- rigid part Restrained Part Datum Usage • How to use datum targets to support, orient, and locate a Form Controls • Calculating the flatness tolerance value for a gasketed joint application • Calculating the cylindricity tolerance value in a support application • Calculating the straightness tolerance value in an assembly application • Overriding Rule #1 to limit flatness on a thin part restrained part in the datum reference frame • How datum shift occurs on a restrained part
Functional Dimensioning • The purpose of tolerances
• The importance of specifying proper tolerances • The importance of a common tolerancing approach • Tolerancing principles and benefits
Interpretation of Feature • The terms “element,” “gap,” and “interruption” • Y14.5 definition of feature and types • Regular, element, complex, and interrupted feature; sub-feature Interpretation of Feature of Size • The terms “opposed,” “fully opposed,” “partially opposed, “size dimension,” and “cylindrical” • Importance of distinguishing between a feature and feature of size • The definition of feature of size from Y14.5
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