MEMB113 ENGINEERING GRAPHICS & CAE. 02 Engineering Graphics & Sketching. Contents. Overview Sketching Engineering graphics & manual drawing Drawing tools Drawing sheets and layout Lettering Lines Scale Abbreviations. Overview .
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02 Engineering Graphics & Sketching
The ability to mentally picture things that do not exist in front of the eyes.
The design solution should be communicated to others without ambiguity
Documentation Permanent record of the solution for future reference.
3-D computer model of the interior of an office building
A dimensioned technical/mechanical drawing
Sketching component (proportional)
A0 : 1189x841
A1 : 841 x 594
A2 : 594 x 420
A3 : 420 X 297
A4 : 297 X 210
A5 : 210 X 148
A6 : 148 X 105
All in mm
A revision table is normally located in the upper right of the drawing frame, or at the bottom on the left side of the title block.
All modifications to the drawing should be documented here.
Material or Parts List
If the drawing contains a number of parts, or if it is an assembly drawing, a tabulated parts list is attached to the bottom right of the drawing frame, just above the title block.
The parts list should give the following information:
the part number
the part name
the quantity required
the drawing number of each individual part
other applicable information
When the parts list is very large a separate drawing sheet may be used for the parts list alone.
A drawing may be divided up into a grid using letters and numbers. When zoning is used it is located inside the drawing frame.
Zoning allows easy references to various parts of the drawing by referencing a coordinate such as C7.
The title block is normally placed in the bottom right of the drawing frame, and it should contain the following information:
- the name of the company or organization
- the title of the drawing
- the drawing number, which is generally a unique filing identifier
- the scale
- the angle of projection used, either first or third, generally shown symbolically
- the signature or initials of the draftsman, checker, approving officer, and issuing officer, with the respective dates
-other information as required
Drawing outlines & visible edges
Hatching, dimension & projection lines
Continuous wavy thick
Limit of partial view
Long & short dash thin
Standard line types used in technical drawing
Engineering Drawing, A.W. Boundy, McGraw-Hill, 2000
Fundamentals of Graphics Communication 3rd Edition, Gary Bertoline & Eric Weibe, McGraw-Hill