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MEASUREMENT OF GEOMETRIC TOLERANCES

IN MANUFACTURING

(per ASME Y14.5M-1994)
James D. Meadows
May 1998 / 496 pages; illustrated;  'Print-on-Demand' $79.75

This insightful reference demonstrates a system of measurement, inspection, gaging, geometric tolerancing and fixturing of products in full compliance with the American National Standards Institute (ANSI), the American Society of Mechanical Engineers (ASME), and the International Organization for Standardization (ISO) approved standards. Providing thorough, easy-to-understand explanations of complex principles, Measurement of Geometric Tolerances in Manufacturing shows how to:

 

save time and money by anticipating potential problems in functionality, part manufacture and measurement 
design high-quality, low-cost products that are easy to produce and measure 
plan a detailed process of data collection during the design phase and collect variables and attribute inspection data 
reduce revisions, increase production-line efficiency, and enhance product reliability 
increase tolerances without adversely affecting function 
move quickly from design to concept to part production by bridging communication barriers between job disciplines 
and more! 

 

Generously illustrated with hundreds of drawings and explaining the language of geometric symbology to clarify technical points, Measurement of Geometric Tolerances in Manufacturing  is a practical guide for mechanical, manufacturing, design, quality control, project, process, industrial automation, automotive, and aerospace engineers and managers; metrologists; draftspersons; and upper-level undergraduate, graduate, and continuing education students in these disciplines. 

James D. Meadows has written some of the wonderful (and real) stories he tells in his training sessions to illustrate technical points and clarify concepts...you'll discover that learning really can be "entertaining". 

Contents:

Introduction to Measurement Principles 
  [Once Upon a Time...in the Land of Measurement] 
       Condition Illustration 
       Verification of Position with Open Set-Up 

Geometric Product Definition and Measurement, Inspection and Gaging Principles 
  [Just Talk the Talk] 
       How to Read a Feature Control Frame 
       How to Read a Feature Control Frame for Purposes of Measurement 

Reading the Feature Control Frame 
  [For a Functional Understanding and To Guide Product Measurement]

Functional Product Definition Creates Functional Inspection 
  [Inspecting Parts as They are Used]
       Functionality Can Be Used to Suggest Manufacturing Procedures 
       Multiple Possibilities of Dimensioning and Tolerancing for Functionality and Inspectability 
       I Can't Measure That 
       Functionality vs. Producibility 
       The Things I've Seen (Where Tolerances Come From) 
       Hog-Tied and Cow-Chipped (Importance of Geometric Definition) 
       Correct and Complete (Tips on Functional Product Definition) 
       Miles to go Before We Sleep (Importance of Geometric Definition) 
       Plastic Parts and Stretch Tolerances 
       Design, Inspection, Production, and Prototype Needs and Capabilities Regarding 
       Dimensioning and Tolerancing 
       Implying a Manufacturing Sequence on Complex Part Configurations 

Principles of Measurement for Geometric Characteristics 
     Geometric Characteristic Symbols 
          Straightness; Flatness; Circularity; Cylindricity; Parallelism; Angularity-Orientation Category; 
          Profile of a Surface 
     Composite Profile vs. Two Single-Segment Profile Controls 
     Coplanarity 
     Conicity 
     Profile of a Line 
     Circular Runout 
     Total Runout 
     Concentricity 
     Symmetry 
     Inspecting Threaded Holes 
     The Boundary Concept 
     Composite Positional Tolerancing vs. Two Single-Segment Positional Tolerancing Controls 

Comparison of Controls [Food Chain of Symbology]
     2-D vs. 3-D Controls 
     Comparison of Coaxiality Controls (Position, Concentricity, Circular Runout, Total Runout) 
     Concentricity vs. Runout 

Datums [When Sweet Seeds Grow Rancid Fruit (How to Select Datum Features)]
    Part Stabilization (Datums for Flexible Parts) 
    Sequential Part Definition vs. Simultaneous Requirement (The Game of Leaders and Followers) 
    Datum Features 
    Simultaneous and Separate Requirements 
    Datum Target Assignment 
    Oddly Configured and Curved Surfaces as Datum Features 
    Free State Variation in Sheet Metal Parts 

Material Conditions (Modifiers) - Meaning and Uses 
    Maximum Material Condition 
    The Maximum Material Condition Symbol and Its Ramifications 
    Allowed vs. Actual Deviation from True Position 
    Least Material Condition (Meaning and Uses) 
    Regardless of Feature Size 

Virtual and Resultant Condition Boundaries
    Virtual Condition-a Functional Boundary 
    Surface vs. Axis Verification 
    Zero Positional Tolerancing at MMC for a Greater Yield 

Gaging--Principles, Terms and Examples
    Gage General Principles 
    Gaging Size Limits; Terms 
    A Few Major Measurement Concepts 
    Gaging a Complex sheet Metal Part 
    General Principles and Terms of Tolerance Compliance 

Merging Theory with Reality [Having the Right Measurement Tool]
     Theory vs. Reality (Uncertainties) 
     Reactions to a Non- Perfect Datum Establishment 

How to Improve Quality [The Zen of Quality]
     Tying Measurements to the Machine 
     How Many Points Should I Probe? 
     The Search for Common Sense (Statistics Out of Control) 
     Quality Issues from the Afterlife (Slogans vs. Programs and Planning) 
     Focus and Excel (Maximizing your Abilities) 
     Competing in a Global Economy (Great Products at an Affordable Cost)] 

Inspection Planning
     Dimensional Inspection Planning 
     Methodical Measurement 

Sources of Measurement Error
  [What We Know Is Often Untrue and Other Sources of Measurement Error]
     CMM Error compensation 
     Certification vs. Calibration 

Graphical Inspection Techniques and Examples
     Graphical Techniques and Inspection Reporting 
     Comparison of Measurement Techniques and Equipment (Advantages and disadvantages 

Teamwork Issues [Unity of Purpose Affects the Bottom Line]
     Concurrent Engineering-Key to Our Future 
     Magical, Mystical Stuff (Doing Something vs. Doing Nothing) 
     Avoiding Tiger Pits . . . While Helping a Leopard Change Its Spots 

Training Issues [I Wonder as I Wander;  Training: An On-Going Process] 

Statistical Process Control [Faulty Implementation--Wonderful Concepts]
     Concepts of Statistical Process Control; Statistical Tolerancing] 

Letters:  Common Problems and Their Solutions [The Good, The Bad and The Really Weird]
     -I See the Light at the End of the Tunnel, But It Could Be a Train 
     -Explosives and a Cell Mate Named Bubba . . . or Training 
     -Shakin' Like a Dog Passin' Peach Pits 
     -My Boss Just Died and I Feel Fine 
     -Bad Meat . . . and No Mayo 
     -Low Foreheads, Bad Instincts, and Hangdog Looks 
     -GD&T Questions I Can't Take Any More

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