Industrial Processes II INDUSTRIAL PROCESSES II INDUSTRIAL PROCESSES II INDEN 3313 INDEN 3313 Lecture 10 -- Geometric Lecture 10 -- Geometric Tolerancing and Dimensioning Tolerancing and Dimensioning Precisely Defining Parts and Precisely Defining Parts and Tooling Tooling
44
Embed
Industrial Processes II INDUSTRIAL PROCESSES II INDEN 3313 Lecture 10 -- Geometric Tolerancing and Dimensioning Precisely Defining Parts and Tooling.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Industrial Processes II
INDUSTRIAL PROCESSES IIINDUSTRIAL PROCESSES II
INDEN 3313INDEN 3313
Lecture 10 -- Geometric Lecture 10 -- Geometric Tolerancing and DimensioningTolerancing and Dimensioning
Precisely Defining Parts and Precisely Defining Parts and ToolingTooling
Industrial Processes II
OVERVIEWOVERVIEW
• Geometric TolerancingGeometric Tolerancing– Datum– Features
• Size• Location• Tolerances
Industrial Processes II
ANNOUNCEMENTSANNOUNCEMENTS
Region IX IIE ConferenceOSU -- ATRC 101, 102
Awesome Design Lectureand Competition 3/3/00Lecture -- 2:30 - 3:20Watkins Center for International TradeCompetition 8:15 - 9:30Watkins Center for International Trade
– 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 Observations
HomeworkOne Copy Submissions
Case Studies --
An opportunity to Perform Self-AssessmentInitial ReactionDealing with AvailabilityTeamwork/Self RelianceScheduling and OrganizationResources
Industrial Processes II
QUESTIONSQUESTIONSTO START ??TO START ??
Industrial Processes II
Jig and Fixture Design – Jig and Fixture Design – Quick Review (1)Quick Review (1)
• Must Arrest 6 (12) Degrees of Must Arrest 6 (12) Degrees of FreedomFreedom– 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 – Jig and Fixture Design – Quick Review (2)Quick Review (2)
• ConsiderationsConsiderations– Principles
• 3-2-1• 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 DRAWING - Fundamental RulesRules
• From From Madsen, Madsen, Geometric Dimensioning Geometric Dimensioning and Tolerancingand Tolerancing, p. 11-12, p. 11-12– 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 DRAWING - Fundamental RulesRules
• From From Madsen, Madsen, Geometric Dimensioning and Geometric Dimensioning and TolerancingTolerancing, p. 11-12, p. 11-12– Specify Part, Not Process, Use
Specifications– Can Include NON-MANDATORY (e.g.,
Shrink)– Arrange Dimensions for Readability– Use Dimensions (Not Gages, Codes)– 90o Implied When Not Stated Within
General Title Block Tolerance (Surfaces, Centerlines)
– All Dimensions at 20o C (68o F), Free State Conditions
Industrial Processes II
DRAWING - Fundamental DRAWING - Fundamental RulesRules
• From From Madsen, Madsen, Geometric Dimensioning Geometric Dimensioning and Tolerancingand Tolerancing, p. 11-12, p. 11-12– Unless Otherwise Stated, Geometric
Tolerances Apply to Full Length, Width, Depth of Feature
• 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 DIMENSIONING TO CONVEY FUNCTIONAL REQUIREMENTSFUNCTIONAL REQUIREMENTS• Dimensioning Must Reflect Part Dimensioning Must Reflect Part