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Lecture 3 ENGR3030U Zeid Ch 4 and 3

# Lecture 3 ENGR3030U Zeid Ch 4 and 3 - Engineering Drawings...

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Engineering Drawings – Ch. 4 Modeling Aids and Tools – Ch. 3 Objectives: Engineering drawings. CAD drawings and CAD views. Title block, dimensioning, tolerances. Notes and labels. Manufacturing information. Geometric modifiers.

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Engineering Drawings – Ch. 4 Modeling Aids and Tools – Ch. 3 Objectives (con’d): Layers. Colors. Grids. Groups. Basic drawing functions. Utility functions.
ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Engineering drawing – tool to document design and communicate it to engineering enterprise, from production, inspection, and assembly to sales and marketing. Formats and customs specific to each discipline. Mechanical and industrial disciplines – parts and models 3D; therefore, drawings contain different views of part geometry. Electrical discipline – circuit and PCB (printed circuit board) usually 2D. Introduction

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drafting paper went through chemical process to preserve content. To this day, engineering drawings referred to as blueprints . Introduction
ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drawing Setup – The Size of Drawing (Limits) Paper Size Sheet Size Limits (1:1) Limits (1:4) – Reduction Limits (4:1) – Magnification A 12 x 9 12, 9 48, 36 3, 2.25 B 18 x 12 18, 12 72, 48 4.5, 3 C 24 x 18 24, 18 96, 72 6, 4.5 D 36 x 24 36, 24 144, 96 9, 6 E 48 x 36 48, 36 192, 144 12, 9 English System (inches)

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drawing Setup – The Size of Drawing (Limits) Paper Size Sheet Size Limits (1:1) Limits (1:4) – Reduction Limits (4:1) – Magnification A4 210 x 197 210, 297 1050, 1485 42, 59.4 A3 297 x 420 297, 420 1485, 2100 59.4, 84 A2 420 x 594 420, 594 2100, 2970 84, 118.8 A1 594 x 841 594, 841 2970, 4205 118.8, 168.2 A0 841 x 1189 841, 1189 4205, 5945 168.2, 237.8 Metric System (mm)
ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drawing Setup – Units Screenshot of unit control dialogue box in SolidWorks.

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drawing Structure Figure 4.1 Structure of an engineering drawing.
ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Model Drawing Associativity Two-way associativity between model and drawing modes. User may either make changes in either modelling or drawing mode. Changes automatically reflected in the other mode once user implements REBUILD or UPDATE command.

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ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Drawing Content Drawing contains model views, dimensions, tolerances, annotations, BOM, assembly instructions, surface finish, and roughness symbols. Views defined and placed while file open on screen. Orthographic rules also enforced. After drawings located and made proper size, add dimensions and tolerances (use of ANSI format). Finally, add labels and notes, title block, BOM, and save.
ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng.

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