MECH 192 COMPUTER AIDED DESIGN

Transcription

1 MECH 192 COMPUTER AIDED DESIGN Asst. Prof. Dr. Onur SARAY Department of Mechanical Engineering Office: T

2 1. INTRODUCTION What is an Engineering Drawing? Engineering drawing is a technical drawing which clearly defines and communicates a design to other interested parties. Other parties may have an interest in: Design collaboration, Manufacturing, Quality control, Marketing, Maintenance Mech 192 Computer Aided Design 2

3 Why do we need to know about Engineering Drawings? To allow our designs to develop from a thought or concept to a sketch on paper. To enable us to communicate Mech 192 Computer Aided Design 3

4 What are aims of this course? To represent our designs on piece of paper To be able to understand principles and rules of engineering drawing. To be able to represent 3D objects/parts/systems in 2D sketches. To be able to use CAD program effectively in 2D module To get the knowledge of 3D modelling of single parts and assemblies To be able to use 3D part design tools effectively. Modellling geometry of engineering systems part by part To be able to mate them into assemblies To be able to use state of the art technology Mech 192 Computer Aided Design 4

5 Suggested Text books: Technical Drawing with Engineering Graphics by Frederick E. Giesecke, Ivan L. Hill, Henry C. Spencer and Alva E. Mitchell Makine resmi, İbrahim Zeki Şen, Nail Özçilingir, Deha Yayınları Teknik resim I-II Kemal Türkdemir, Pamukkale University Mech 192 Computer Aided Design 5

6 Week s 1 Course schedule: Lecture topics Syllabus-Learning objectives Introduction, Basic components of engineering drawing Drawing are, paper layout, lines: properties and meanings Introduction to SolidWorks 2012 GUI, Basic drawing tools of Solidworks Construction of drawing area 2 Geometric construction, projections, dimensions HW#2 3 Sectioning HW#3 2D 4 Drawing of common machine elements: Screws, nuts, ball bearings, gears, etc. HW#4 5 Assembly principles, tolerences HW#5 6 Assemblies-applications HW#6 7 Assemblies-applications HW#7 8 MIDTERM EXAM Dues HW#1 9 Part design with Solidworks HW#8 10 Part design with Solidworks: Automated generation of 2D drawings of 3D parts, annotations HW#9 11 Assembling parts : Mates HW# D Assemblies: Automated generation of 2D drawings of 3D assemblies HW#11 13 Using design library for assemblies HW#12 14 Review of semester, preperation to final exam Mech 192 Computer Aided Design 6

7 Grading policy? Homeworks %30 Midterm %30 Final exam % Mech 192 Computer Aided Design 7

8 2. Principles of technical drawing 2. Drawing sheet(s) A0 A1 A2 A series (mm) 841x x x594 A3* 297x420 A4** A5 A6 A7 210x x x210 74x105 * Midterm and final exams ** Homeworks Orientations: Portrait (A4) 90 Landscape (A3) Mech 192 Computer Aided Design 8

9 2. Principles of technical drawing 2. Layout: All the details necessary to manufacture the part have to be clearly illustrated. 2D views 3D models Paper border Drawing area border Notes to underline critical issues. TITLE BLOCK conveys info. about: Company name Designer,controll er Design date Part defination Revisions Materials Surface finish, tolerences Mech 192 Computer Aided Design 9

10 2. Principles of technical drawing 2. Title blocks according to Turkish standart TS EN ISO 5457 TS EN ISO Mech 192 Computer Aided Design 10

11 2. Principles of technical drawing 2. Lines Lines with different visual properties (type, thickness) are used to illustrate different features of a 2D drawing view. Basic line types: Appearance Features Function Continuous, solid, Thick (0.35mm) Dashed, Medium (0.25mm) Chain, Medium (0.2mm) Continuous, solid Thin (0.2 mm) Part outlines, visible edges Invisible edges Center lines center marks, sectioning lines. Hatching, dimensioning annotations, extension lines Mech 192 Computer Aided Design 11

12 2. Principles of technical drawing 2. Sheet layout to be used in the course Left margin: 15mm Bottom, Top Right margins: 10mm Mech 192 Computer Aided Design 12

13 2. Principles of technical drawing 2. Dimensions of title block to be used in the course Mech 192 Computer Aided Design 13