Engineering drawings
What are Engineering drawings?
• An engineering drawing is a type of
technical drawing
Types of technical drawings
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Engineering drawing
Cut away drawing
Exploded view drawing
Patent drawing
Technical illustrations
Technical sketches
Working drawings eg plumbing and electrical
drawings.
Cut away drawing
Exploded view drawing
Patent drawing
Technical Illustration
Technical sketches
A typical Engineering drawing
What is the purpose of an
Engineering drawing?
• Discuss in groups
• Engineering drawings provide information
for an operator to make an item
• They are created within the technical
drawing discipline
• They are used to fully and clearly define
requirements for engineered items.
• Engineering drawings are usually created in
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accordance with standardized conventions for:
layout,
nomenclature,
interpretation,
appearance (such as typefaces and line styles),
size, etc.
Standardisation
• What do we mean by standardisation?
• Discuss in groups
• Will Engineers in Japan understand the
drawings made in this country?
• It means consistent , all the same,
identical
What needs to be standardised?
• Discuss in groups
Standards and Conventions
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Standards and conventions for:
layout
line thickness
text size
Symbols
view projections
descriptive geometry
dimensioning
What information would you need
to make an item?
• What material will we use
• Dimensions- what size will it be
• Imperial or metric measurement – how are the
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sizes measured?
Tolerances – how accurate do the
measurements need to be – limits and fits
Surface texture – how smooth or rough
How will it be made – what process
Are there more than one part
How will they be put together