aerospace_fastener_applications_part2_R2010.ppt

5/19/2018 aerospace_fastener_applications_part2_R2010.ppt

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An AerospaceAn Aerospace

ManufacturingManufacturing

PerspectivePerspective

Aerospace Fastener ApplicationsAerospace Fastener Applications

Part 2Part 2

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Aerospace Rivets

Primarily used to fasten aerospace skins to the

sub-structure Concerned mainly with shear and tension loads.

Two types of rivets:

Solid Rivet lind Rivet

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Aerospace Rivets

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Rivets on the skin of a

Boeing 737


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Aerospace Solid Rivets

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Universal solid rivets on the skin of a

Boeing 737

Note that they are not

flush with the skin


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ountersunk solid rivets on the engine

pylon of a Boeing 737

Note that these rivets

are flush with the surface


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Aerospace Solid Rivets - Identification

Rivets manufactured in accordance with the !"#$S standards are

identified by a four part code:

%. !" or $S specification and head type

&. one or two letters that indicate the material

'. shank diameter in %#'&nd inch increments

(. a dash followed by a number that indicates rivet len)th in %#%*th

inch increments.

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Aircraft rivets are !ade

of !any !aterials" and

co!e in a wide variety ofshapes and si#es

$ow do you select the

right si#e%

$ow do you select the

right !aterial%

&e !ust know what the

part nu!'er tells us(


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)*a!ple+ rivet identification standard universal head solid rivet

$aterial: &%%+-T( aluminium

%#, inch diameter

#%* inch in len)th

Rivet / 0 either !"(+1!/(-or $S&1(+1!/(-

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Same rivet2 different material:%%11 aluminium

!"(+1!(- or $S&1(+1!(-.

!"(+1 or $S&1(+1 denote the specification for universal head types

!/ is the material code for &%%+-T(

3!0%%112 01*2 C0copper2 /0&1%+2 //0&1&(2 40stainless

and $0$onel5

( 0 (#'& or %#, inch diameter - 0 #%* inch len)th

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Aerospace Solid Rivet Installation

Rivet installation su!!ary,

-rill appropriately si#ed holes, -e'urr holes

, .ecure pieces together with lecos

, /nstall rivet" 'uck with rivet gun or use a rivet

s0uee#er

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1234 256

8 sheet

alu!inu! to'e 9oined with

rivetsRivet gunBucking 'ar

-rill-rill 'it and

chuck keyenter punchleco

leco pliers


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-rilling holeswith a :32 drill

'it

Use ;1;=?4@

drill 'it


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-e'urr the holes

'y rotating >'yhand@ a !uch

larger drill 'it in the

holes

his re!oves any

!etal shavings

caused 'y drilling


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Position the

pieces togetherand secure using

lecos

lecos !aintain

proper align!entof the pieces while

rivets are 'eing

installed


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Place the rivet

in the hole

Make sure you

are using the

correct si#e"!aterial" and

type of rivet


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Align the rivet gun

on the rivet head

$old the 'ucking

'ar on the opposite

end of the rivet

Pull the trigger onthe rivet gun to

ha!!er the rivet in

place


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.olid rivets can 'e

installed using a rivet

s0uee#er instead of apneu!atic rivet gun

he s0uee#er is hand

operated

he s0uee#er uses

various inserts depending

on the type and si#e of

rivet 'eing installed

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Aerospace !lind Rivets

6sed when you cannot physically access one side of the

work

lind rivets are hollow2 and thus weaker than solid rivets

To retain stren)th of the 7oint:

stron)er material2 lar)er diameter rivets2 or more are

necessary and of course

&118 heavier than a solid rivet because of steel stem

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Aerospace !lind Rivets

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Aerospace Rivets " F#sela$e Repair

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Note that solid fasteners

are used e*cept in the

!iddle of the patch

&hy would you use 'lindfasteners in this

application%

)*terior of a riveted patch fuselage skin patch


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Aerospace Rivets " F#sela$e Repair

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Because the stringer

on the interior of the

fuselage prevents the

'ucking a solid rivet

re0uires

Blind rivets are the

only option when

access is restricted

/nterior of a riveted fuselage skin patch


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%#alit& Ass#rance of Aerospace

Fasteners

Aerospace asteners Material .election

Aerospace asteners esting

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Aerospace Fasteners 'aterial

Selection

ack)round

Some factors to be considered before material selection

are:

The ma9. and min. operatin) temperatures

The corrosiveness of the environment

4ati)ue and impact loadin) !lways try to use standard fasteners2 such as !"2 $S2

$2 "!S2 S!;

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Selection

Alloy .teels

Alu!inu! itaniu!

.tainless .teel

.uperalloys

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Selection

!luminum is the predominant material used in the manufacture of

commercial aircraft.

Table ' lists the typical aluminum alloys used in commercial aircraft.

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!asic Aerospace Fasteners

Application

he 'asic applications >or needs@ for

aerospace fasteners are+, .hear, ension

, atigue

, uel tightness, $igh te!perature

, orrosion control

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Aerospace Fasteners (estin$

Analy#ing a oint, alculate all the load re0uired for each type of

9oint failure+Rivet .hear.heet ensileBearing

.heet .hear

, ailure will occur in the !ode that correspondswith the lowest load carrying capa'ility1

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Aerospace Fastener Standardi)ation

Most aerospace hardware is !anufacturedper govern!ent standards

he three !ost co!!on aircraft fastener

standards used are+

, AN C Air orce


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*o++on Standardi)edFasteners

, Bolts

, Nuts

, &ashers

, urn'uckles

, otter pins

, .crews, Rivets

, Plu!'ing fittings >pipes and tu'es@

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aerospace_fastener_applications_part2_R2010.ppt

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