Dimensioning, Tolerancing & Mat Finish

Dimensioning, Tolerancing & Mat Finish - Dimensions...

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Dimensions MTS – 242 Computer Aided Drawing
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The Real World MTS – 242 Computer Aided Drawing
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Content MTS – 242 Computer Aided Drawing Overview Terminology Basic Concept Standard Practice Detail Dimensioning Dimensioning Techniques AutoCAD
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Overview MTS – 242 Computer Aided Drawing
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Overview MTS – 242 Computer Aided Drawing Overview Dimension is a way of displaying the size information and feature location on a drawing Generally consist of lines and number: – dimension lines – extension lines – leader lines – number to indicate the measurement
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Overview MTS – 242 Computer Aided Drawing Overview
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Overview MTS – 242 Computer Aided Drawing Proper dimensioning should give enough information to manufacture the component! BUT NO REDUNDANCY!! Overview
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Overview MTS – 242 Computer Aided Drawing Overview GOOD! BAD!
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Overview MTS – 242 Computer Aided Drawing Overview Designs are dimensioned based on two criteria: – Basic sizes and locations of features – Details for construction and for manufacturing The unit of measurement should be consistent – mm or inches – mm, inches, etc …. – should be written on drawing CRITERIA
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Overview MTS – 242 Computer Aided Drawing Overview Generally two types: Linear dimension: Example: mm Angular dimension: in degree, minutes and seconds
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Example MTS – 242 Computer Aided Drawing Overview
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MTS – 242 Computer Aided Drawing
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Terminology MTS – 242 Computer Aided Drawing Terminology
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Basics MTS – 242 Computer Aided Drawing Basic Concept Size dimension May be the overall width of a part or the diameter of a hole Location dimension May be the length from the edge of an object to the center of a feature
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Basics MTS – 242 Computer Aided Drawing Basic Concept Basic criteria “What info is necessary to manufacture or construct the object?” Example: to drill a hole, you need to know 1. The diameter of the hole 1. The location of the center 1. The depth of the hole
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Basics MTS – 242 Computer Aided Drawing Basic Concept
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Standard Practice MTS – 242 Computer Aided Drawing
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Standard Practice MTS – 242 Computer Aided Drawing Standard Practice Dimension line – Broken for the placing numbers Placement – Dimension placement depends on the space available – Should follow the standard practices “Practice makes perfect!”
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MTS – 242 Computer Aided Drawing
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This note was uploaded on 01/29/2011 for the course EE 203 taught by Professor Gp.(r)muzaffarali during the Fall '10 term at College of E&ME, NUST.

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Dimensioning, Tolerancing & Mat Finish - Dimensions...

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