1 / 17

CHAPTER 2

CHAPTER 2. Introduction to Manual Drawing. MEMB113 | MANUAL DRAWING | CHAPTER 2. Contents. Drawing tools Drawing sheets and layout Lettering Lines Scale Abbreviations. MEMB113 | MANUAL DRAWING | CHAPTER 2. 2.1 Drawing tools.

evette
Download Presentation

CHAPTER 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHAPTER 2 Introduction to Manual Drawing

  2. MEMB113 | MANUAL DRAWING | CHAPTER 2 Contents • Drawing tools • Drawing sheets and layout • Lettering • Lines • Scale • Abbreviations

  3. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.1 Drawing tools • Tools and instruments that are used to produce technical drawing manually • Some tools are essentials while others are optional • Including: • The drawing board/table • Drawing instruments • Measuring instruments • The set squares • Pencils and erasers • Instruments to aid the drawing of curves

  4. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.1 Drawing tools • These are used to place the paper for drawing • The drawing table • Normally A0 or A1 size • Usually attached with Tee-square • The drawing board • Normally a flat wooden board with Tee square • Size to suit the range of paper sizes (A0-A3) • Drawing sheet is fixed to the board using clips or tape

  5. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.1 Drawing tools • Drawing instruments • Include instruments to draw circles • Compasses : friction-joint & spring bow • Many sizes e.g. • To draw small circles - up to 20mm radius • To draw circles 5mm to 150mm radius

  6. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.1 Drawing tools • Measuring instruments • E.g scale rule • Set squares • Several types • 60o,30o set square • 45o set square • adjustable set square

  7. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.1 Drawing tools • Pencil and erasers • 18 degrees of hardness: • from 9H – very hard • to 7B – very soft • normally it is recommended: • 2H or H for construction, dimension, extension, leader, center lines • HB or B for lettering, visible lines • Instruments to aid drawing curves • French curves • Flexible curve

  8. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.2 Drawing layout • Drawing sheets • Usually based on 'A' series • Drawing sheets material - paper, linen, plastic film • Drawing sheet layout • Sheet frames or border • Usually 20mm for A0 & A1, 10mm for others • Title block or title frame • Represents general information source for a drawing • Usually at bottom right-hand corner A0 : 1189x841 A1 : 841 x 594 A2 : 594 x 420 A3 : 420 X 297 A4 : 297 X 210 All in mm

  9. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.2 Drawing layout

  10. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.3 Lettering • Text is an important part of a technical drawing. Not all info required on technical dwg can be communicate graphically such as dimensions. • One method of creating text is by freehand lettering. The standard style for freehand lettering is single-stroke Gothic lettering.

  11. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.3 Lettering • Characteristic of good lettering • Should be neat, not sloppy • Should be uniform and consistent i.e. same height, proportion & inclination – use guidelines • Should have proper spacing of letters and words • Should not contain unnecessary frills

  12. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.3 Lettering • Characteristic of good lettering • Should use capital letters except for standard abbreviation e.g. mm, kg • Recommended minimum height 2.5mm • Recommended height 5mm to 7mm • Underlining of lettering should be avoided

  13. Pencil Description Usage Example B/2B/0.5mm Continuous thick Drawing outlines & visible edges Continuous thin Hatching, dimension & projection lines Continuous wavy thick Limit of partial view Dashed thin Hidden detail Long & short dash thin Center lines MEMB113 | MANUAL DRAWING | CHAPTER 2 2.4 Lines • Different line types for different purposes - to ensure drawing to be read quickly & accurately • Types of lines and thickness of line • Commonly used line types & thickness: 2H/H/ 0.3mm B/2B/ 0.5mm 2H/H/ 0.3mm 2H/H/ 0.3mm

  14. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.4 Lines Standard line types used in technical drawing

  15. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.5 Scale • What does it mean? • Scale used should always be stated on drawing – important info that is usually written in the title block. • 'do not scale' / 'not to scale‘ / NTS – the drawing is not drawn to a certain scale • Recommended scale • 1:1 for full size • for greater than full size • 2:1 for twice full size • 10:1 for ten times full size • for reduced size • 1:2 for half full size • 1:10 for tenth full size • other common scale - 1:5, 1:20, 1:50, 1:100, 1:500 etc.

  16. MEMB113 | MANUAL DRAWING | CHAPTER 2 2.6 Abbreviations

  17. End of Chapter 2 Thank You

More Related