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MEMB113: ENGINEERING

GRAPH ICS & CAE

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Assembly and detail drawings

There are several different types of engineering

drawings:Detail drawings (single part drawing)

Assembly drawing

Collective part drawing

Combined detail and assembly drawingExploded drawing assembly

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Detail drawings

Used as the main reference in the manufacture of

individual components

Should give complete detailed information to

manufacture the component

Should completely define shape and size

Include all dimensions and tolerances

Should include information related to material,

treatment, surface finish, inspection required.

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Detail drawing

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Assembly drawing

Used to show how a number of components are fitted

together to make a complete product unit

Will have min. info. such as overall size

Each individual components is referenced by a number

in a circle (balloon reference), and a leader pointing to

it

Parts list table is indicated on the drawing

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Assembly drawing

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Collective part drawings

Alternative to single part drawingShows an item with all dimensions, but those

dimension/s which vary will be given a letter and, by

reference to a table, the size/s and the part number

can be obtainedE.g. rivets or bolts

The items have the same form but dimensions may vary

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Collective part drawings

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Combined detail & assembly drawing

A combination of detailed and assembly drawing

Used to show each items and the assembly on one

drawing sheet

Only suitable for small products, and simple assembly

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Combined detail & assembly drawing

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Exploded assembly drawing

A pictorial drawing showing all components in a 3D

form in their correct position for assembly

Useful in DIY kit and giving information to not

technically trained people

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Exploded assembly drawing

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End of Chapter [11]

References:

-Engineering Drawing, A.W. Boundy, McGraw-Hill, 2000-Fundamentals of Graphics Communication 3rd Edition, GaryBertoline & Eric Weibe, McGraw-Hill