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Assembly Drawings Assembly Drawings,,
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Parts ListsParts Lists
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A design that has been approved for prototype or
full-scale manufacture requires a set of working
drawings to communicate the object’s geometry toeveryone involved with its manufacture and
assembly.
Working drawings are a complete set ofdocuments that include:
Working rawingsWorking rawings
! Individual part drawings! One or more assembly
drawings
! A parts list
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Assembly rawings Assembly rawings
An assembly drawing shows how all of the
parts of a multi-component design fit together"and are generally depicted as one or more
orthographic projections.
#ne or more full section views are often used
in an assembly drawing to show necessary
internal features.
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$%ample Assembly rawing$%ample Assembly rawing
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&nformation from Assemblies&nformation from Assemblies
! #ne or more views" including sections or au%iliaries
! $nlarged views to show small details
! #verall or specific dimensions needed for assembly
! 'otes on manufacturing processes required forassembly
! (alloons to indicate item numbers
! )arts list or bill of materials *(#+,
Assembly drawings may contain the
following:
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! esign Assembly
! eneral Assembly
! etail Assembly
! $rection Assembly! ubassembly
! )ictorial Assembly
/ypes of Assembly rawings/ypes of Assembly rawings
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Design assemblies are used to
show various relationshipsbetween components.
/he design assembly at the right
shows the kinematic relationship
that e%ists between the flywheel’s 0123 rotation" and the
e%treme angular motion of the
piston cylinder body.
esign Assemblyesign Assembly
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Design assemblies are often made from sketches
during the preliminary phases of a design process
to study the relationships that e%ist between thecomponents before the design is modeled.
esign Assemblyesign Assembly
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A general assembly is the
most common type of
assembly drawing. &t is
displayed as a multiview
drawing and may contain a
section view.General assemblies do
not contain dimensions.
eneral Assemblyeneral Assembly
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etail Assemblyetail Assembly
A detail assembly is a combination of an
assembly view with several of its partsdepicted as dimensioned multiview drawings
on one drawing sheet.
/his practice" though not common" reducesthe number of drawing sheets needed" and
is more appropriate for designs with small
numbers of components.
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$%ample etail Assembly$%ample etail Assembly
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$rection Assembly$rection Assembly! imilar to general assemblies" e%cept
dimensions and fabrication specifications arecommonly included.
! /ypically associated with cabinetry or products
that are made from structural steel.
! 4sed for both fabrication and assembly.
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ubassembly rawingubassembly rawing
5omple% or large
assemblies may becommunicated through
subassembly drawings.
FlashlightSubassembly
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)ictorial Assembly)ictorial Assembly! 4sually depicted as an
isometric or perspective
drawing.
! +ay be rendered to imitate
photographic quality.
! 4ses include:
- Sales promotion
- Customer self-assembly
- aintenan!e pro!edures
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)ictorial assemblies are
often used in catalogs" journal articles" and
advertisements.
/his pictorial issectioned to show
interior details.
)ictorial Assembly rawings)ictorial Assembly rawings
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Exploded
pictorial
assembly
drawings are
commonly used
to show howindividual
components fit
together.
)ictorial Assembly rawings)ictorial Assembly rawings
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(alloons(alloons
A balloon is a
circle thatcontains a
single number"
which is
connected to anassembly
component with
a leader line.
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! All balloons on a drawing should be the same
si6e.
! (alloons should be grouped together in an easy-
to-read pattern.
! (alloon numbers must correspond to item
numbers in a parts list.
! (alloons should not have hori6ontal or vertical
leader lines.
(alloon uidelines(alloon uidelines
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A parts list is a
table that contains
information abouteach of the parts
contained in an
assembly. /he
item numbers
correspond with
the balloon
numbers.
)arts 7ist)arts 7ist
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$%ample )arts 7ist$%ample )arts 7ist
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)arts 7ist &nformation)arts 7ist &nformation
! &tem number 8 from balloons.! 9uantity 8 the number of a particular part needed
for the assembly.! )art or drawing number 8 a reference back to the
detail drawing.! escription 8 usually the part name or complete
description of a purchase part.! +aterial identification 8 the material of the part.
! &nformation about vendors 8 for purchase parts.
&tems commonly found in a parts list include:
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)arts 7ist 7ocation)arts 7ist 7ocation
! Above the title block 8 most common
! 4pper right corner ! 4pper left corner
! A convenient location on the drawing
/he location of a parts list usually depends on
company standards. 5ommon locations
include:
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)arts 7ist 7ocation)arts 7ist 7ocation
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