IT 110

Geometric Dimensioning & Tolerancing

Fall 2007

 

Instructor:        Dr. Feng-Chang Roger Chang

                        Associate Professor

                        Department of Technology

                        Southern Illinois University Carbondale

Phone:             (618)536-3396

Fax:                 (618)453-7455

E-Mail:            chang@engr.siu.edu

 

COURSE OBJECTIVE: This course will present the principles of geometric dimensioning and tolerancing (GD&T) as it applied to industry accepted standards, such as ANSI/SME Y14.5M – 1994. This includes the use and meaning of GD&T symbols on manufactured part drawings. The interpretation of GD&T symbols in feature control frames and the application of GD&T symbology to various working drawings is emphasized.

 

TEXTBOOK: Geometric Dimensioning and Tolerancing, by David A. Madsen, The Goodheart-Willcox Company, Inc., 2003.

 

EVALUATION:

 

            Exam 1                                                20%

            Exam 2                                                20%

            Quizzes                                               10%

            Homework                                          10%

            Term Project

                        Written Report             15%

                        Oral Presentation                     15%

            Class Participation and Attendance     10%

 

GRADING STANDARDS:

 

A:        90-100%

B:        80-89%

C:        70-79%

D:        60-69%

F:         <60%

 

EQUIPMENT: A hand-held scientific calculator.

 

GRADING POLICY: No late homework will be accepted and missed exams have a 20% penalty unless an appropriate, prior excuse is given to the instructor. The missed exam must be completed on the make-up date set by the instructor.

 

ACADEMIC CONDUCT: Cheating on examinations, submitting work of other students as your own, or plagiarism in any form will result in penalities ranging from an F on the assignment to expulsion from the university, depending on the seriousness of the offense.

 

 

MAJOR TOPICS:

  • ANSI/ASME Y14.5M standard
  • GD&T rules and practices
    • Maximum material conditions (MMC)
    • Least material conditions (LMC)
    • Extreme form variation
  • GD&T symbols and terms
    • Feature Control Frame
    • Basic dimensions
    • Geometric characteristic symbol
    • Bonus tolerance
  • Datums
    • ANSI/ASME Y14.5M symbols
    • Datum targets
  • Form and Profile Tolerances
    • Straightness
    • Flatness
    • Circularity and Cylindricity
    • Profile of a line/surface
  • Orientation and runout
    • Parallelism
    • Perpendicularity
    • Angularity
  • Location tolerances
    • Position
    • Concentricity
    • Virtual condition

 

MINIMUM STUDENT COMPETENCIES:

  • Interpret dimensioning rules
  • Identify different dimensioning practices
  • Explain coordinate tolerancing uses
  • Explain geometric tolerancing benefits
  • Compare coordinate versus geometric tolerancing
  • Identify different tolerance types
  • Interpret mating part fits
  • Interpret tolerancing fundamentals
  • Identify geometric characteristic symbols
  • Draw feature control frames
  • Interpret feature control frames
  • Identify datum surfaces
  • Identify datum axis
  • Identify datum center planes
  • Identify datum target symbols
  • Interpret datums
  • Interpret material condition symbols
  • Analyze straightness tolerances
  • Measure feature straightness
  • Analyze flatness tolerances
  • Measure feature flatness
  • Analyze circularity tolerances
  • Measure feature circularity
  • Analyze cylindricity tolerances
  • Measure feature cylindricity
  • Draw form tolerance symbols
  • Interpret form tolerances
  • Analyze profile of a line tolerances
  • Analyze profile of a surface tolerances
  • Draw profile tolerance symbols
  • Interpret profile tolerances
  • Analyze parallelism tolerances
  • Measure feature parallelism
  • Analyze perpendicularity tolerances
  • Measure feature perpendicularity
  • Analyze angularity tolerances
  • Measure feature angularity
  • Analyze circular runout tolerances
  • Analyze total runout tolerances
  • Measure feature runout
  • Draw orientation tolerance symbols
  • Draw runout tolerance symbols
  • Interpret orientation and runout tolerances
  • Define true position
  • Measure feature positioning
  • Analyze multiple feature positional tolerancing
  • Analyze composite pattern tolerancing
  • Analyze two single-segment feature control frames
  • Draw location tolerance symbols
  • Interpret tolerances of position
  • Analyze projected tolerance zones
  • Analyze concentricity tolerances
  • Analyze coaxiality tolerances
  • Measure feature concentricity
  • Analyze symmetry tolerances
  • Interpret virtual condition