Engineering Drawning & Graphics-Introduction,types &other information-Lecture 1-By Engr Zohaib Ali Khan
- 1. Engr. Zuhaib Ali Khan University of Engineering and Technology Peshawar Pakistan engr_zuhaib@nwfpuet.edu.pk engr_zuhaib@yahoo.com Office Location : Fuel Lab Mechanical Engineering Department Mechanical Engineering Department Spring 2015 ENGINEERING DRAWING & GRAPHICS
- 2. ME-105 (Th) ENGINERING DRAWING & GRAPHICS Contact hours: 2 Credit hours: 2 Objective: To understand basic concepts of Engineering Drawing and its applications in the production of design outputs.
- 3. Books • Text: a. ‘Elementary Engineering Drawing’, Revised and Enlarged Edition by N. D. Bhatt. • Reference: a. ‘Engineering Drawing and Graphic Technology’, 14th Edition by Thomas E. French, Charles J. Vierck and Robert J. Foster.
- 4. Grading Mid-term Exam 25% Final-term Exam 50% Homework Assignments 10% Tests and Quizzes 15%
- 5. 1. INTRODUCTIOIN TO ENGINEERING DRAWING: • A language of Engineers to describe a. Shape b. Size c. Fit d. Finish e. Production Process and Specification f. Function g. Assembly
- 6. 2. TYPES OF DRAWING: a. Detail Drawings • To describe the shape, size, fit and finish of each and every part in detail for production purposes. b. Sub-Assembly Drawings • To describe the fit and method of fastening for a small group of components to create an assembly. c. Assembly Drawings • To describe the fit and method of fastening for a group of sub-assemblies to create a larger assembly.
- 7. PC SUB-ASSEMBLY AND ASSEMBLY DRAWING PC detail Drawing
- 8. 3. TYPES OF MEASURING SYSTEMS: a. English • Feet and Inches b. Metric • Meters and Millimeters
- 9. 4. DRAWING INSTUMENTS AND THEIR USES: a. Drawing Board Serves as a flat drawing surface to attach a paper to. Drawing board size: Drawing boards are made in various sizes. The selection of Drawing board depends on the size of drawing paper used. • Standard size of Drawing boards • Designation Size (mm) Designation Size (mm) • B0 1500 × 1000 B3 500 × 350 • B1 1000 × 700 B4 250 × 350 • B2 700 × 500
- 10. b. Drafting Media • Paper • Film (Tracing Paper) Standard Sizes are: USA size, inches Closest International size, mm A (8.5 x 11.0) A4 (210 x 297) B (11.0 x 17.0) A3 (297 x 420) C (17.0 x 22.0) A2 (420 x 594) D (22.0 x 34.0) A1 (594 x 841) E (34.0 x 44.0) A0 (841 x 1189)
- 11. c. Pencils Classification according to lead hardness is: Hard grades Medium grades Soft grades 9H Hardest 3H Hardest 2B Hardest 8H 2H 3B 7H H 4B 6H F 5B 5H HB 6B 4H Softest B Softest 7B Softest d. Eraser e. T Square For drawing horizontal lines and provide a supporting/sliding edge for set-squares and other stencils.
- 12. f. Set-Squares For drawing vertical and angular lines g. Scales i. Linear scales (English and Metric) ii. Cardboard scales (For reducing and increasing size) iii. Diagonal scales (For measuring fractions) iv. Protractor (For measurement of angles) h. Compass with Extender For drawing circles and circular arcs i. Divider For transferring measurements and for dividing lines into andy number of equal parts.
- 13. Lecture 2
- 14. 5. TYPES OF LINES USED IN ENGINEERING DRAWING:
- 18. a) Visible Outline For showing visible edges of an object b) Hidden Outline For showing hidden edges of an object c) Center Line For locating center of circles, arc and ellipses relative to the object. 0.35 mm to 0.5 mm thick 0.25 mm to 0.35 mm thick 0.13 mm to 0.2 mm thick 0.5 mm to 0.7 mm thick d) Cutting Plane Line To show the location of the imaginary secion plane in the reference view. 2 to 2.5 mm 1 to 1.5 mm 15 to 20 mm 1 to 1.5 mm2 to 2.5 mm 15 to 20 mm 2 to 2.5 mm 1 to 1.5 mm
- 19. Dimension line 0.18 to 0.25 mm thick Extension Line 0.18 to 0.25 mm thick Terminator 0.25 to 0.35 mm thick 2 to 2.5 mm long 0.13 mm to 0.2 mm thick 0.35 to 0.5 mm thick i) Section Lines A pattern of thin lines 0.2 to 0.25 mm thick. The pattern and thickness is dependent on the material. h) Long Break Line To show long breaks 0.35 mm to 0.5 mm thick g) Short Break Line For showing short breaks f) Extension Lines, Dimension Lines and Terminators For extension of edges and placement of dimensions. e) Phantom Line For showing alternate position and/or adjacent part. 1 to 1.5 mm 15 to 20 mm 0.13 mm to 0.2 mm thick 2 to 2.5 mm 73
Editor's Notes
- #4: ہب