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In this project “DESIGN AND FABRICATION OF SEMI-AUTOMATIC CIRCULAR PATH GAS CUTTING” main objectives is to bring out the idea of making circular path cutting in semi automatic manner without manual handling. Generally in conventional welding type, the cutting is done manually. As it is manual process, the chance for error is high moreover the accuracy is less, which leads to more tolerance. since in minute cutting operation, it is difficult to obtain the desired output. Particularly for cutting shapes, the conventional cutting method seems to more tedious. Here in our project, we suggest a new idea to overcome the difficulties in the conventional cutting.
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DESIGN AND FABRICATION OF
SEMI-AUTOMATIC CIRCULAR PATH GAS
CUTTING
A dissertation submitted in partial fulfillment for the award of the degree of
BACHELOR OF ENGINEERING
IN
MECHANICAL ENGINEERING
Submitted by:
C.RAJESH KUMAR 91008144073
N.SANKAR 91008144086
M.SIA 91008144100
.SRIRAM AINASH 91008144103
Under the Guidance of
M!. T.RAMACHANDRAN" M.E #A$$%&'()* +!%,*$$%!
DEPARTMENT OF MECHANICAL ENGINEERING
ANNA UNIVERSITY OF TECHNOLOGY TIRUCHIRAPPALLI
APRIL 2011
1
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DECLARATION
.
I hereby declare ha he !"r# e$%led DESIGN AND FABRICATION OF
SEMI-AUTOMATIC CIRCULAR PATH GAS CUTTING&%' '(b)%ed %$ *ar%al
+(l+%ll)e$ "+ he re,(%re)e$ +"r he a!ard "+ he de-ree %$ .E A$$a U$%/er'%y "+ Tech$"l"-y
T%r(ch%ra**all% %' a rec"rd "+ he )y "!$ !"r# carr%ed "( by )e d(r%$- he acade)%c year
2010 2011 ($der he '(*er/%'%"$ a$d -(%da$ce "+ M!.
T.RAMACHANDRAN"M.E#A$$%&'()* +!%,*$$%!" e*ar)e$ "+ 3echa$%cal
E$-%$eer%$- PSNA COLLEGE OF ENGINEERING AND TECHNOLOG/.
The e4e$ a$d '"(rce "+ %$+"r)a%"$ are der%/ed +r") he e4%'%$- l%era(re a$d ha/e
bee$ %$d%caed hr"(-h he d%''era%"$ a he a**r"*r%ae *lace'. The )aer e)b"d%ed %$ h%'
!"r# %' "r%-%$al a$d ha' $" bee$ '(b)%ed +"r he a!ard "+ a$y "her de-ree "r d%*l")a e%her
%$ h%' "r a$y "her U$%/er'%y.
5S%-$a(re "+ he Ca$d%dae6
3.SIVA
71008199100
I cer%+y ha he declara%"$ )ade ab"/e by he ca$d%dae %' r(e
S%-$a(re "+ he G(%de
M!. T.RAMACHANDRAN" M.E
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BONAFIDE CERTIFICATE
Th%' %' " cer%+y ha he d%''era%"$ e$%led : DESIGN AND FABRICATION OFSEMI-AUTOMATIC CIRCULAR PATH GAS CUTTING& %' a b"$a+%de !"r# carr%ed "(
by M!.M.SIA" R*.N% 91008144100. ($der )y d%rec '(*er/%'%"$ a$d %' '(b)%ed %$
*ar%al +(l+%ll)e$ "+ he re,(%re)e$' +"r he a!ard "+ de-ree "+ achel"r "+ 3echa$%cal
E$-%$eer%$- %$ PSNA C"lle-e "+ E$-%$eer%$- a$d Tech$"l"-y" A$$a U$%/er'%y "+ Tech$"l"-y
T%r(ch%ra**all% T%r(ch%ra**all% ;20029. N" *ar "+ he d%''era%"$ ha' bee$ '(b)%ed +"r
a$y de-ree
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SERIAL NO TITLE PAGES
ABSTRACT 6
1 INTRODUCTION 8
1.1 *5' 10
1. G($ &))' 11
1.3 O: ($ &))' *;'+
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6 APPLICATIONS 34
7 LIST OF MATERIALS 3=
8 COST ESTIMATION 36
9 CONCLUSION 37
BIBLIOGRAPH/
PHOTOGRAPH/
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ABSTRACT
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ASTRACT
I$ h%' *r"@ec DESIGN AND FABRICATION OF SEMI-AUTOMATIC CIRCULAR
PATH GAS CUTTING@)a%$ "b@ec%/e' %' " br%$- "( he %dea "+ )a#%$- c%rc(lar *ah c(%$-
%$ 'e)% a(")a%c )a$$er !%h"( )a$(al ha$dl%$-.
Ge$erally %$ c"$/e$%"$al !eld%$- y*e he c(%$- %' d"$e )a$(ally. A' % %' )a$(al
*r"ce'' he cha$ce +"r err"r %' h%-h )"re"/er he acc(racy %' le'' !h%ch lead' " )"re
"lera$ce. '%$ce %$ )%$(e c(%$- "*era%"$ % %' d%++%c(l " "ba%$ he de'%red "(*(.
Par%c(larly +"r c(%$- 'ha*e' he c"$/e$%"$al c(%$- )eh"d 'ee)' " )"re ed%"('.
Here %$ "(r *r"@ec !e '(--e' a $e! %dea " "/erc")e he d%++%c(l%e' %$ he c"$/e$%"$al
c(%$-.
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CHAPTER I
INTRODUCTION
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INTRODUCTION
I$ O(r *r"@ec &DESIGN AND FABRICATION OF SEMI-AUTOMATIC
CIRCULAR PATH GAS CUTTING& '(--e' a $e! )eh"d +"r c%rc(lar *ah "*era%"$ %$
c(%$- *r"ce''..
A$ O4yBAceyle$e "(+% %' *"rable %$e4*e$'%/e a$d /er'a%le. y ('%$- he
*r"*er %*' al)"' a$y )eal ca$ be c( ('%$- he O4yBAceyle$e *r"ce''.
Aceyle$e %' a -a'
ha %' )a$(+ac(red by )%4%$- Calc%() Carb%de !%h !aer. Aceyle$e !he$ b(r$ed al"$e ca$
*r"d(ce a +la)e e)*era(re "+ ab"( 9000 de-. F. %h he add%%"$ "+ O4y-e$ a +la)e
e)*era(re %$ e4ce'' "+ ;000 de-. F. ca$ be ach%e/ed )a#%$- Aceyle$e %deal +"r !eld%$- a$d
c(%$-.T"day )"' !eld%$- %' acc")*l%'hed by arc !eld%$- a$d -a' %' ('ed *red")%$aely +"r
c(%$- *(r*"'e'.O4yBAceyle$e "rch c(%$- rel%e' "$ he c")b('%"$ "+ +(el -a'e' ('(ally
O4y-e$ a$d Aceyle$e " hea )eal' a he c(%$- *"%$. T"rch c(%$- %' a ,(%c# a$d
%$e4*e$'%/e '"l(%"$ " he *r"ble) "+ +%eld c(%$- )eal'.
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1.1 ELDING
ELDING IS A PROCESS FOR JOINING DIFFERENT MATERIALS@
T2* (!* %,
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1. GAS CUTTING
The c"))"$ )eh"d' ('ed %$ c(%$- )eal are "4y -a' +la)e c(%$- a%r carb"$Barc
c(%$- a$d *la')aBarc c(%$-. The )eh"d ('ed de*e$d' "$ he y*e "+ )eal " be c( a$d he
a/a%lab%l%y "+ e,(%*)e$. A' a Seel!"r#er "4y -a' "r a%r carb"$Barc e,(%*)e$ %' he )"'
c"))"$ y*e "+ e,(%*)e$ a/a%lable +"r y"(r ('e.
The "4y -a' c(%$- "rch ha' )a$y ('e' %$ 'eelB !"r#. A )"' $a/al ac%/%%e' he Seel!"r#er+%$d' he c(%$- "rch a$ e4celle$ ""l +"r c(%$- +err"(' )eal'. Th%' /er'a%le ""l %' ('ed +"r
"*era%"$' '(ch a' be/el%$- *lae c(%$- a$d be/el%$- *%*e *%erc%$- h"le' %$ 'eel *lae a$d
c(%$- !%re r"*e.
he$ ('%$- he "4y -a' c(%$- *r"ce'' y"( hea a '*" "$ he )eal " he #%$dl%$- "r
%-$%%"$ e)*era(re 5be!ee$ 1900DF a$d 1;00DF +"r 'eel'6. The er) +"r h%' "4y -a' +la)e %'
he PREHEATING FLA3E. Ne4 y"( d%rec a @e "+ *(re "4y-e$ a he heaed )eal by
*re''%$- a le/er "$ he c(%$- "rch. The "4y-e$ ca('e' a che)%cal reac%"$ #$"!$ a'
OIATION " a#e *lace ra*%dly. he$ "4%da%"$ "cc(r' ra*%dly % %' called CO3USTION
"r URNING. he$ % "cc(r' 'l"!ly % %' #$"!$ a' RUSTING.
he$ y"( ('e he "4y -a' "rch )eh"d " c( )eal he "4%da%"$ "+ he )eal %'
e4re)ely ra*%d a$d *ar "+ he )eal ac(ally b(r$'. The hea l%beraed by he b(r$%$- "+ he
%r"$ "r 'eel )el' he %r"$ "4%de +"r)ed by he che)%cal reac%"$ a$d accelerae' he *rehea%$-
"+ he "b@ec y"( are c(%$-. The )"le$ )aer%al r($' "++ a' 'la- e4*"'%$- )"re %r"$ "r 'eel "
he "4y-e$ @e. I$ "4y -a' c(%$- "$ly ha *"r%"$ "+ he )eal ha %' %$ he d%rec *ah "+ he
"4y-e$ @e %' "4%d%ed. The $arr"! 'l% +"r)ed %$ he )eal a' he c(%$- *r"B -re''e' %' called
he #er+. 3"' "+ he )aer%al re)"/ed +r") he #er+ %' %$ he +"r) "+ "4%de' 5*r"d(c' "+ he
"4%da%"$ reac%"$6. The re)a%$der "+ he )aer%al %' )"le$ )eal ha %' bl"!$ "r !a'hed "( "+
he #er+ by he +"rce "+ he "4y-e$ @e.
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1.3 O/ GAS CUTTING E>UIPMENT
A$ "4y -a' c(%$- "(+% ('(ally c"$'%'' "+ a cyl%$der "+ aceyle$e "r 3APP -a' a
cyl%$der "+ "4y-e$ !" re-(la"r' !" le$-h' "+ h"'e !%h +%%$-' a$d a c(%$- "rch !%h %*'
5+%-. 9B16. A$ "4y -a' c(%$- "(+% al'" %' re+erred " a' a c(%$- r%-. I$ add%%"$ " he ba'%c
e,(%*)e$ )e$%"$ed ab"/e $()er"(' y*e' "+ a(4%l%ary e,(%*)e$ are ('ed %$ "4y -a' c(%$-.
A$ %)*"ra$ %e) %' he '*ar# %-$%er ha %' ('ed " l%-h he "rch 5+%-. 9B2 /%e! A6. A$"her
%e) y"( ('e %' a$ a**ara(' !re$ch. I %' '%)%lar %$ de'%-$ " he "$e 'h"!$ %$ +%-(re 9B2 /%e!
. The a**ara(' !re$ch %' '")e%)e' called a -a$- !re$ch beca('e % +%' all he c"$$ec%"$' "$
he c(%$- r%-. N"e ha he !re$ch 'h"!$ ha' a ra%'ed "*e$%$- %$ he ha$dle ha 'er/e' a' a$
aceyle$e a$# #ey.
Oher c"))"$ acce''"r%e' %$cl(de %* clea$er' cyl%$der r(c#' cla)*' a$d h"ld%$- @%-'.
Per'"$al 'a+ey a**arel '(ch a' -"--le' ha$d 'h%eld' -l"/e' leaher a*r"$' 'lee/e' a$d
le--%$-' are e''e$%al a$d 'h"(ld be !"r$ a' re,(%red +"r he @"b a ha$d. I$+"r)a%"$ "$ 'a+ey
a**arel %' al'" c"$a%$ed %$.
O4y -a' c(%$- e,(%*)e$ ca$ be 'a%"$ary "r *"rB able. A *"rable "4y -a' "(+% '(ch
a' he "$e %' a$ ad/a$a-e !he$ % %' $ece''ary " )"/e.
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1>
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1.4 CUTTING TORCHES
The e,(%*)e$ a$d acce''"r%e' +"r "4y -a' c(%$- are he 'a)e a' +"r "4y -a' !eld%$-
e4ce* ha y"( ('e a c(%$- "rch "r a c(%$- aach)e$ %$'ead "+ a !eld%$- "rch. The )a%$
d%++ere$ce be!ee$ he c(%$- "rch a$d he !eld%$- "rch %' ha he c(%$- "rch ha' ($'cre!
he !eld%$- %* a$d he$ 'cre! "$ he c(%$- aach)e$. The h%-hB*re''(re c(%$- "4y-e$ %'
c"$r"lled by a le/er "$ he "rch ha$dle.
1.= CUTTING TORCH TIPS
A' %$ !eld%$- y"( )(' ('e he *r"*er '%e c(%$- %* %+ ,(al%y !"r# %' " be d"$e. The
*rehea +la)e' )(' +(r$%'h @(' he r%-h a)"($ "+ hea a$d he "4y-e$ @e "r%+%ce )(' del%/er
he c"rrec a)"($ "+ "4y-e$ a @(' he r%-h *re''(re a$d /el"c%y " *r"d(ce a clea$ c(. All "+
h%' )(' be d"$e !%h a )%$%)() c"$'()*%"$ "+ "4y-e$ a$d +(el -a'e'. Carele'' !"r#er' a$d
!"r#er' $" ac,(a%$ed !%h he c"rrec *r"ced(re' !a'e b"h "4y-e$ a$d +(el -a'. Th%' d"e'
$" 'ee) %)*"ra$ !he$ y"( are !"r#%$- %$ a 'h"* b( %+ y"( are de*l"yed.
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CHAPTER III
DESCRIPTION OF E>UIPMENTS
1?
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MOTOR
P!'&'+*$ %, %+*!()'%
I$ a$y elecr%c )""r "*era%"$ %' ba'ed "$ '%)*le elecr")a-$e%'). A c(rre$Bcarry%$-
c"$d(c"r -e$erae' a )a-$e%c +%eld !he$ h%' %' he$ *laced %$ a$ e4er$al )a-$e%c +%eld %
!%ll e4*er%e$ce a +"rce *r"*"r%"$al " he c(rre$ %$ he c"$d(c"r a$d " he 're$-h "+ he
e4er$al )a-$e%c +%eld. A' y"( are !ell a!are "+ +r") *lay%$- !%h )a-$e' a' a #%d "**"'%e
5N"rh a$d S"(h6 *"lar%%e' arac !h%le l%#e *"lar%%e' 5N"rh a$d N"rh S"(h a$d S"(h6
re*el. The %$er$al c"$+%-(ra%"$ "+ a C )""r %' de'%-$ed " har$e'' he )a-$e%c %$erac%"$
be!ee$ a c(rre$Bcarry%$- c"$d(c"r a$d a$ e4er$al )a-$e%c +%eld " -e$erae r"a%"$al
)"%"$.
Le' 'ar by l""#%$- a a '%)*le 2B*"le C elecr%c )""r 5here red re*re'e$' a )a-$e
"r !%$d%$- !%h a N"rh *"lar%a%"$ !h%le -ree$ re*re'e$' a )a-$e "r !%$d%$- !%h a
S"(h *"lar%a%"$6.
E/ery C )""r ha' '%4 ba'%c *ar' BB a4le r""r 5a.#.a. ar)a(re6 'a"r c"))(a"r
+%eld )a-$e5'6 a$d br('he'. I$ )"' c"))"$ C )""r' 5a$d all ha EA3er' !%ll 'ee6 he
e4er$al )a-$e%c +%eld %' *r"d(ced by h%-hB're$-h *er)a$e$ )a-$e'1. The 'a"r %' he
'a%"$ary *ar "+ he )""r BB h%' %$cl(de' he )""r ca'%$- a' !ell a' !" "r )"re *er)a$e$
)a-$e *"le *%ece'. The r""r 5"-eher !%h he a4le a$d aached c"))(a"r6 r"ae !%h
re'*ec " he 'a"r.
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The r""r c"$'%'' "+ !%$d%$-' 5-e$erally "$ a c"re6 he !%$d%$-' be%$- elecr%cally
c"$$eced " he c"))(a"r. The ab"/e d%a-ra) 'h"!' a c"))"$ )""r lay"( BB !%h he r""r
%$'%de he 'a"r 5+%eld6 )a-$e'.
The -e")ery "+ he br('he' c"))(a"r c"$ac' a$d r""r !%$d%$-' are '(ch ha
!he$ *"!er %' a**l%ed he *"lar%%e' "+ he e$er-%ed !%$d%$- a$d he 'a"r )a-$e5'6 are
)%'al%-$ed a$d he r""r !%ll r"ae ($%l % %' al)"' al%-$ed !%h he 'a"r' +%eld )a-$e'. A'
he r""r reache' al%-$)e$ he br('he' )"/e " he $e4 c"))(a"r c"$ac' a$d e$er-%e he
$e4 !%$d%$-. G%/e$ "(r e4a)*le !"B*"le )""r he r"a%"$ re/er'e' he d%rec%"$ "+ c(rre$
hr"(-h he r""r !%$d%$- lead%$- " a +l%* "+ he r""r' )a-$e%c +%eld dr%/%$- % " c"$%$(e
r"a%$-.
I$ real l%+e h"(-h C )""r' !%ll al!ay' ha/e )"re ha$ !" *"le' 5hree %' a /ery
c"))"$ $()ber6. I$ *ar%c(lar h%' a/"%d' dead '*"' %$ he c"))(a"r. Y"( ca$ %)a-%$e
h"! !%h "(r e4a)*le !"B*"le )""r %+ he r""r %' e4acly a he )%ddle "+ %' r"a%"$
5*er+ecly al%-$ed !%h he +%eld )a-$e'6 % !%ll -e '(c# here. 3ea$!h%le !%h a !"B*"le
)""r here %' a )")e$ !here he c"))(a"r 'h"r' "( he *"!er '(**ly 5%.e. b"h br('he'
"(ch b"h c"))(a"r c"$ac' '%)(la$e"('ly6. Th%' !"(ld be bad +"r he *"!er '(**ly !a'e
e$er-y a$d da)a-e )""r c")*"$e$' a' !ell. Ye a$"her d%'ad/a$a-e "+ '(ch a '%)*le )""r%' ha % !"(ld e4h%b% a h%-h a)"($ "+ "r,(e r%**le 5he a)"($ "+ "r,(e % c"(ld *r"d(ce %'
cycl%c !%h he *"'%%"$ "+ he r""r6.
S" '%$ce )"' ')all C)""r' are "+ a hreeB*"le de'%-$ le' %$#er !%h he !"r#%$-' "+ "$e
/%a a$ %$erac%/e a$%)a%"$ 5Ja/aScr%* re,(%red6=
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DC MOTORS
A C )""r %' de'%-$ed " r($ "$ C elecr%c *"!er. T!" e4a)*le' "+ *(re C de'%-$'
are 3%chael Faraday' h")"*"lar )""r 5!h%ch %' ($c"))"$6 a$d he ball bear%$- )""r
!h%ch %' 5'" +ar6 a $"/ely. y +ar he )"' c"))"$ C )""r y*e' are he br('hed a$d
br('hle'' y*e' !h%ch ('e %$er$al a$d e4er$al c"))(a%"$ re'*ec%/ely " *er%"d%cally re/er'e
he c(rre$ %$ he r""r !%$d%$-'
BRUSHED DC MOTORS
"r#%$-' "+ a br('hed elecr%c )""r
C )""r de'%-$ -e$erae' a$ "'c%lla%$- c(rre$ %$ a !"($d r""r "r ar)a(re !%h a
'*l% r%$- c"))(a"r a$d e%her a !"($d "r *er)a$e$ )a-$e 'a"r. A r""r c"$'%'' "+ "$e "r
)"re c"%l' "+ !%re !"($d ar"($d a c"re "$ a 'ha+ a$ elecr%cal *"!er '"(rce %' c"$$eced " he
r""r c"%l hr"(-h he c"))(a"r a$d %' br('he' ca('%$- c(rre$ " +l"! %$ % *r"d(c%$-
elecr")a-$e%'). The c"))(a"r ca('e' he c(rre$ %$ he c"%l' " be '!%ched a' he r""r
(r$' #ee*%$- he )a-$e%c *"le' "+ he r""r +r") e/er +(lly al%-$%$- !%h he )a-$e%c *"le' "+
he 'a"r +%eld '" ha he r""r $e/er '"*' 5l%#e a c")*a'' $eedle d"e'6 b( raher #ee*'
r"a%$- %$de+%$%ely 5a' l"$- a' *"!er %' a**l%ed a$d %' '(++%c%e$ +"r he )""r " "/erc")e he
'ha+ "r,(e l"ad a$d %$er$al l"''e' d(e " +r%c%"$ ec.6
a$y "+ he l%)%a%"$' "+ he cla''%c c"))(a"rC )""r are d(e " he $eed +"r br('he'
" *re'' a-a%$' he c"))(a"r. Th%' creae' +r%c%"$.S*ar#' are creaed by he br('he' )a#%$-
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http://en.wikipedia.org/wiki/Michael_Faradayhttp://en.wikipedia.org/wiki/Homopolar_motorhttp://en.wikipedia.org/wiki/Ball_bearing_motorhttp://en.wikipedia.org/wiki/Armature_(electrical_engineering)http://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/File:Electric_motor_cycle_2.pnghttp://en.wikipedia.org/wiki/Michael_Faradayhttp://en.wikipedia.org/wiki/Homopolar_motorhttp://en.wikipedia.org/wiki/Ball_bearing_motorhttp://en.wikipedia.org/wiki/Armature_(electrical_engineering)http://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Friction7/17/2019 Design and Fabrication -Mini Project
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a$d brea#%$- c%rc(%' hr"(-h he r""r c"%l' a' he br('he' cr"'' he %$'(la%$- -a*' be!ee$
c"))(a"r 'ec%"$'. e*e$d%$- "$ he c"))(a"r de'%-$ h%' )ay %$cl(de he br('he'
'h"r%$- "-eher ad@ace$ 'ec%"$'Ka$d he$ce c"%l e$d'K)")e$ar%ly !h%le cr"''%$- he -a*'.
F(rher)"re he %$d(ca$ce"+ he r""r c"%l' ca('e' he /"la-e acr"'' each " r%'e !he$ %'
c%rc(% %' "*e$ed %$crea'%$- he '*ar#%$- "+ he br('he'. Th%' '*ar#%$- l%)%' he )a4%)()
'*eed "+ he )ach%$e a' ""Bra*%d '*ar#%$- !%ll "/erhea er"de "r e/e$ )el he c"))(a"r.
The c(rre$ de$'%y *er ($% area "+ he br('he' %$ c")b%$a%"$ !%h he%r re'%'%/%y l%)%' he
"(*( "+ he )""r. The )a#%$- a$d brea#%$- "+ elecr%c c"$ac al'" ca('e' elecr%cal $"%'e a$d
he '*ar#' add%%"$ally ca('e RFI. r('he' e/e$(ally !ear "( a$d re,(%re re*lace)e$ a$d he
c"))(a"r %'el+ %' '(b@ec " !ear a$d )a%$e$a$ce 5"$ lar-er )""r'6 "r re*lace)e$ 5"$
')all )""r'6. The c"))(a"r a''e)bly "$ a lar-e )""r %' a c"'ly ele)e$ re,(%r%$-
*rec%'%"$ a''e)bly "+ )a$y *ar'. O$ ')all )""r' he c"))(a"r %' ('(ally *er)a$e$ly
%$e-raed %$" he r""r '" re*lac%$- % ('(ally re,(%re' re*lac%$- he !h"le r""r.
Brushless DC motors
S")e "+ he *r"ble)' "+ he br('hed C )""r are el%)%$aed %$ he br('hle'' de'%-$. I$
h%' )""r he )echa$%cal r"a%$- '!%ch "r c"))(a"r
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POER SUPPL/
There are )a$y y*e' "+ *"!er '(**ly. 3"' are de'%-$ed " c"$/er h%-h /"la-e AC
)a%$' elecr%c%y " a '(%able l"! /"la-e '(**ly +"r elecr"$%c' c%rc(%' a$d "her de/%ce'. A
*"!er '(**ly ca$ by br"#e$ d"!$ %$" a 'er%e' "+ bl"c#' each "+ !h%ch *er+"r)' a *ar%c(lar
+($c%"$.
F%! *(
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S a$d 9. (r%$- he *"'%%/e hal+ cycle "+
he a**l%ed AC /"la-e d%"de' 1 a$d > c"$d(c'. h%le d(r%$- he $e-a%/e hal+ cycle 2 9
c"$d(c'. The c(rre$ hr"(-h he l"ad +l"!' %$ he 'a)e d%rec%"$ %$ he b"h hal+ cycle he
"(*( "+ he rec%+%er c"$a%$' r%**le'. F%ler' are ('ed red(ce' he r%**le' c")*"$e$' %$ he
"(*(.
21
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SPUR GEAR TERMINOLOG/
A55*5
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5*+)2.
C*(!(&*.T2* (
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BEARING
A *(!'%' a de/%ce " all"! c"$'ra%$ed rela%/e )"%"$ be!ee$ !" "r )"re*ar' y*%cally
r"a%"$ "r l%$ear )"/e)e$. ear%$-' )ay be cla''%+%ed br"adly acc"rd%$- " he )"%"$' hey
all"! a$d acc"rd%$- " he%r *r%$c%*le "+ "*era%"$ a' !ell a' by he d%rec%"$' "+ a**l%ed l"ad'
hey ca$ ha$dle.
T/PES OF BEARING
Pla%$ bear%$-
R"ll%$- ele)e$ bear%$-
Je!el bear%$-
3a-$e%c bear%$-
Fle4(re bear%$-
ROLLING-ELEMENT BEARING
A !%'-**
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Needle
Ta*ered r"ller bear%$-
S*her%cal r"ller
BALL BEARING
A ( *(!' %' a y*e "+ r"ll%$-Bele)e$ bear%$- ha ('e' ball' " )a%$a%$ he
'e*ara%"$ be!ee$ he )"/%$- *ar' "+ he bear%$-.
The *(r*"'e "+ a ball bear%$- %' " red(ce r"a%"$al +r%c%"$ a$d '(**"r rad%al a$d a4%al
l"ad'. I ach%e/e' h%' by ('%$- a lea' !" races " c"$a%$ he ball' a$d ra$')% he l"ad'
hr"(-h he ball'. U'(ally "$e "+ he race' %' held +%4ed. A' "$e "+ he bear%$- race' r"ae' %
ca('e' he ball' " r"ae a' !ell. eca('e he ball' are r"ll%$- hey ha/e a )(ch l"!er c"e++%c%e$
"+ +r%c%"$ ha$ %+ !" +la '(r+ace' !ere r"a%$- "$ each "her.
all bear%$-' e$d " ha/e l"!er l"ad ca*ac%y +"r he%r '%e ha$ "her #%$d' "+ r"ll%$-B
ele)e$ bear%$-' d(e " he ')aller c"$ac area be!ee$ he ball' a$d race'. H"!e/er hey ca$
"lerae '")e )%'al%-$)e$ "+ he %$$er a$d "(er race'.
C")*ared " "her r"ll%$-Bele)e$ bear%$-' he ball bear%$- %' he lea' e4*e$'%/e
*r%)ar%ly beca('e "+ he l"! c"' "+ *r"d(c%$- he ball' ('ed %$ he bear%$-.
2?
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C2(+)*! I
DESIGN AND DRAING
2;
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MATERIAL SELECTION
3aer%al +"r b"h *%$%"$ a$d -ear %' TEFLON GEAR@
TEFLON GEAR
PROPERT/ ALUE
D*$'): 00
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FORMULAE USED
1. P%?*! #P 3.14NT60
. T%!;* #T 3.14516
2*!* N$+**5 %, )2*
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27
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CHAPTER
ORKING PRINCIPLE
>0
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%!' +!'&'+*
The able c"$'%' "+ -ear c"(*led )""r *%$%"$ )a%$- -earbear%$-
re/"/%$- d%'c a$d -(%d%$- *lae. he 'ha+ "+ he )""r " !h%ch *%$%"$ -ear %' +%4ed. The *%$%"$
%' )ade " be )aed !%h he lar-e )a%$- -ear +"r he *(*"'e "+ '*eed red(c%"$. The 'ha+ "+
he )a%$- -ear " !h%ch he re/"l/%$- d%'c +%4ed.
The -(%d%$- *lae %$ he re/"l/%$- d%'c %' ('ed " h"ld he c(%$- "rch. The
-ear c"(*led )""r !h%ch ac' a' he e4er$al '"(rce "+ *"!er ra$')%' he '*eed +r") he
*%$%"$ " )a%$- -ear a$d h(' he '*eed -e' red(ced. (e " he re/"l/%$- d%'c r"ae' he
"rch aached " % al'" r"aed.
The +"r!ard a$d re/er'e )"%"$ "+ he d%'c %' "ba%$ by ('%$- +"r!ard a$d
re/er'e '!%ch. he !"r# *%ece !he$ *laced "$ a bed a cera%$ d%'a$ce +r") he "rch -e c(ed
%$ c%rc(lar *ah.
>1
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MERITS AND DE-MERITS
MERITS
P"rable.
Le'' '*ace "cc(*%ed.
Le'' )a%$e$a$ce.
I$%%al c"' %' le''.
DE-MERITS
H%-h 'a+ey *reca(%"$ %' re,(%red.
Cha$ce " b(r'
>2
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APPLICATION
U'ed %$ ')all 'cale %$d('r%e'. Re-(lar +abr%ca%"$ "+ a(")"b%le car' a%rBcra+' re+r%-era"r' ec.
3ach%$e ""l' +ra)e' c(%$- ""l' a$d d%e'.
>>
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LIST OF MATERIAL
SI .NO COMPONENT MATERIAL
1 G*(! T*,%
C*)!* $2(,) M'5 $)**3 B*(!' C($) '!%
4 G'5* +()* M'5 $)**
= I5*' +()* M'5 $)**
>9
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COST ESTIMATION
LABOUR COST
L()2*" 5!''" ?*5'" +%?*! 2(&$(?" ($ &))' &%$)
L(%! &%$)1000!$
OERHEAR CHARGES
M(,(&)!' &%$) M()*!'( &%$) L(%! &%$)
30001000
4000!$
O*!2*(5 &2(!*$ 0 %, )2* ?
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CONCLUSION
I !*&*) )!*5" )2* &))' +!%&*$$ +(:$ ( '
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BIBLIOGRAPH/
*$')*$
???.(52*$'*$(5$*(()$.&%