Industrial Processes II INDUSTRIAL PROCESSES II INDEN 3313 Lecture Geometric Tolerancing and Dimensioning Precisely Defining Parts and Tooling

Industrial Processes II OVERVIEW Geometric TolerancingGeometric Tolerancing –Datum –Features Size Location Tolerances

Industrial Processes II ANNOUNCEMENTS Region IX IIE Conference OSU -- ATRC 101, 102 Awesome Design Lecture and Competition 3/3/00 Lecture -- 2:30 - 3:20 Watkins Center for International Trade Competition 8:15 - 9:30 Watkins Center for International Trade

Industrial Processes II IIE Student Conference Details ScheduleSchedule 9:15 – 10:00 –Facility Location Design (OU) –Alternative Route Effect on Turnaround Time – Campus Shuttle System (UH) 10:15 – 11:00 –Receiving at a Hardware Store –Integration of Security Monitoring and Switchboard Operations at Norman Regional Hospital (OU) 11:45 – 12:30 –Elementary School crossing Speed and Time (UH) –Improvement in Wiring and Examination of Outsourcing of Componenets (TT)

Industrial Processes II IIE Student Conference Details ScheduleSchedule 2:45 – 3:45 –Performance Improvement in a Service Environment (St.M) –Design and Development of a Graduate Application System (OSU) –Setup Reduction at CNC Machining Centers (WSU) –Main Conference Rm. 102 –Use 101 for Overflow, Short In/Out Minimize Disturbance to Conference –Note: Non-paying guest –On-time, quiet, etc. …

Industrial Processes II Observations Homework One Copy Submissions Case Studies -- An opportunity to Perform Self- Assessment Initial Reaction Dealing with Availability Teamwork/Self Reliance Scheduling and Organization Resources

Industrial Processes II QUESTIONS TO START ??

Industrial Processes II Jig and Fixture Design – Quick Review (1) Must Arrest 6 (12) Degrees of FreedomMust Arrest 6 (12) Degrees of Freedom –Provide “Fixed” Location and Orientation of Part in Space Location Surfaces/DatumLocation Surfaces/Datum –Must Use Those Specified on Drawing –Each Feature is Located from 3 Datum –Each Jig/Fixture Can Only Locate 3 Datum Multiple Datum Sets (for Different Features) May Require Multiple Tooling to be Designed and Built

Industrial Processes II Jig and Fixture Design – Quick Review (2) ConsiderationsConsiderations –Principles Maximum Separation Minimum Contact –Features Drain Holes Legs/Attachment to Machine Tool Clamps (Forces into Locators, Activation Time) Visibility/Operator Access Bushings (Jigs) – Type, Use Replacement of Worn Parts

Industrial Processes II DRAWING - Fundamental Rules From Madsen, Geometric Dimensioning and Tolerancing, p From Madsen, Geometric Dimensioning and Tolerancing, p –Every Dimension Has a Tolerance (except for Reference, Maximum, Minimum, or Stock). Tolerances May be Applied Directly to the Dimension or Via the Title Block –Dimensioning and Tolerancing Must be Complete. –All Needed Dimensions must be Shown, No Redundant Dimensions, Minimize Reference Dimensions –Dimensions Set By Part Function, Mating

Industrial Processes II DRAWING - Fundamental Rules From Madsen, Geometric Dimensioning and Tolerancing, p From Madsen, Geometric Dimensioning and Tolerancing, p –Specify Part, Not Process, Use Specifications –Can Include NON-MANDATORY (e.g., Shrink) –Arrange Dimensions for Readability –Use Dimensions (Not Gages, Codes) –90 o Implied When Not Stated Within General Title Block Tolerance (Surfaces, Centerlines) –All Dimensions at 20 o C (68 o F), Free State Conditions

Industrial Processes II DRAWING - Fundamental Rules From Madsen, Geometric Dimensioning and Tolerancing, p From Madsen, Geometric Dimensioning and Tolerancing, p –Unless Otherwise Stated, Geometric Tolerances Apply to Full Length, Width, Depth of Feature –Dimensions Apply Where Specified on Drawing

Industrial Processes II DRAWING - Basic Dimensioning Location DimensionsLocation Dimensions –Where, In Relation to Datum (Range) Size, Shape AllowedSize, Shape Allowed –Shape and Allowed Size Range Shape of Tolerance ZoneShape of Tolerance Zone ApplicabilityApplicability –Maximum Material Condition –Minimum Material Condition –Regardless of Feature Size Captured in Feature Control FrameCaptured in Feature Control Frame

Industrial Processes II DIMENSIONING TO CONVEY FUNCTIONAL REQUIREMENTS Dimensioning Must Reflect Part Function, Mating PartsDimensioning Must Reflect Part Function, Mating Parts Wilson, Figure 3-22, p. 44

Industrial Processes II DIMENSIONING PRACTICE Avoid Double Dimensioning - Stack-upAvoid Double Dimensioning - Stack-up Wilson, Figure 3-32a, p. 49

Industrial Processes II DIMENSIONING PRACTICE Avoid Double Dimensioning - Stack-upAvoid Double Dimensioning - Stack-up Wilson, Figure 3-32b, p. 49

Industrial Processes II DIMENSIONING PRACTICE Reference DimensioningReference Dimensioning Wilson, Figure 3-33, p. 49

Industrial Processes II DIMENSIONING PRACTICE Tolerance InterpretationTolerance Interpretation Wilson, Figure 34-50a, p. 89

Industrial Processes II DIMENSIONING PRACTICE Tolerance InterpretationTolerance Interpretation Wilson, Figure 34-50b, p. 89

Industrial Processes II DIMENSIONING PRACTICE Tolerance InterpretationTolerance Interpretation Conventional Dimensioning Sets “Square” Tolerance Zones - May Not Be Functionally CorrectConventional Dimensioning Sets “Square” Tolerance Zones - May Not Be Functionally Correct SIZE, SHAPE OF TOLERANCE ZONE FOR POSITION OF CENTER OF MATING PIN (BLUE,BLACK,PINK, AND ORANGE) IN HOLE (GREEN)

Industrial Processes II DIMENSIONING PRACTICE Tolerance InterpretationTolerance Interpretation Conventional Dimensioning Sets “Square” Tolerance Zones - May Not Be Functionally CorrectConventional Dimensioning Sets “Square” Tolerance Zones - May Not Be Functionally Correct SIZE, SHAPE OF TOLERANCE ZONE FOR POSITION OF CENTER OF MATING PIN (BLUE,,PINK, AND ORANGE) IN SLOT (GREEN)

Industrial Processes II GD&T DIMENSIONING ConceptsConcepts –Least Material Condition –Maximum Material Condition –Represent the Acceptable Extremes of Part Surfaces/Material

Industrial Processes II GD&T DIMENSIONING External ( MMC and LMC)External ( MMC and LMC) Wilson, Figure 4-44, p. 86

Industrial Processes II GD&T DIMENSIONING Internal (MMC and LMC)Internal (MMC and LMC) Wilson, Figure 4-45, p. 86

Industrial Processes II GD&T DIMENSIONING Form Variation Within Perfect Form BoundariesForm Variation Within Perfect Form Boundaries Wilson, Figure 5-9, p. 102

Industrial Processes II GD&T DIMENSIONING Form Variation Within Perfect Form BoundariesForm Variation Within Perfect Form Boundaries Wilson, Figure 5-10, p. 103

Industrial Processes II GD&T DIMENSIONING Surface Elements - StraightnessSurface Elements - Straightness Wilson, Figure 5-11, p. 103

Industrial Processes II GD&T DIMENSIONING Surface Elements - StraightnessSurface Elements - Straightness Wilson, Figure 5-12, p. 104

Industrial Processes II GD&T DIMENSIONING Surface Elements - StraightnessSurface Elements - Straightness Wilson, Figure 5-13, p. 105

Industrial Processes II GD&T DIMENSIONING Surface Elements - Axis StraightnessSurface Elements - Axis Straightness Wilson, Figure 5-16, p. 106

Industrial Processes II GD&T DIMENSIONING Surface Elements - Axis StraightnessSurface Elements - Axis Straightness Wilson, Figure 5-17, p. 106

Industrial Processes II GD&T DIMENSIONING Surface Elements - Hole StraightnessSurface Elements - Hole Straightness Wilson, Figure 5-19, p. 107

Industrial Processes II GD&T DIMENSIONING Measuring StraightnessMeasuring Straightness Wilson, Figure 5-14, p. 105

Industrial Processes II GD&T DIMENSIONING Virtual ConditionVirtual Condition Wilson, Figure 5-18, p. 107

Industrial Processes II GD&T DIMENSIONING PerpendicularityPerpendicularity Wilson, Figure 7-17, p. 151

Industrial Processes II GD&T DIMENSIONING AngularityAngularity Wilson, Figure 7-26, p. 155

Industrial Processes II GD&T DIMENSIONING Feature Control FrameFeature Control Frame Madsen, p. 320

Industrial Processes II GD&T DIMENSIONING Feature Control FrameFeature Control Frame Madsen, p. 320

Industrial Processes II GD&T DIMENSIONING SymbolsSymbols Kalpakjian, Figure 35.27a, p. 1060

Industrial Processes II GD&T DIMENSIONING SymbolsSymbols Kalpakjian, Figure 35.27b, p. 1060

Industrial Processes II GD&T DIMENSIONING SamplesSamples Wilson, Figure 6-1, p. 117

Industrial Processes II GD&T DIMENSIONING SamplesSamples Madsen, p. 297

Industrial Processes II GD&T DIMENSIONING SamplesSamples Wilson, Figure 6-43, p. 137

Industrial Processes II QUESTIONS OR CLARIFICATIONS ???