Various Gear Finishing Methods

8/16/2019 Various Gear Finishing Methods

1/9

VARIOUS GEAR FINISHING

METHODS

Presented by –

Yoginder Yada Tan!" #inda$


2/9

%HY GEAR FINISHING ISNE&ESSARY'

Gear (nis)ing is ne*essary be*a!senone o+ t)e ,et)ods o+ gear

,an!+a*t!ring -rod!*es gears o+a**!rate di,ensions and s)a-e. D!eto /)i*) any error in -rod!*tion /i$$

$ead to noisy -er+or,an*e o+ t)e

gear bo0. Irreg!$ar /ear o+ t)e teet)and !neen $oad distrib!tion on t)e

teet) are t)e +a*tors eno!g) to

*a!se an ear$y +ai$!re o+ t)e gears


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GEAR SHAVING

• It is a (nis)ing o-eration t)at re,oes s,a$$a,o!nt o+ ,eta$ +ro, t)e 1an2s o+ gear teet).

• May *orre*t s,a$$ errors in toot) s-a*ing3 )e$i0ang$e3 toot) -ro($e and *on*entri*ity.

• &an e$i,inate toot) end $oad *on*entration 3 red!*egear noise and in*rease $oad *arrying *a-a*ity.

• It )as been !sed s!**ess+!$$y in (nis)ing

• gears o+ dia,eter -it*)es +ro, 456 to 7.

• S)aing is done by t/o ,et)ods

a8 Ra*2 s)aing

b8 Rotary s)aing


4/9

Ra*2 s)aing

• In ra*2 s)aing a ra*2 ty-es)aing too$ is re*i-ro*ated

!nder t)e gear and in +eedta2es -$a*e at t)e end o+ea*) stro2e.

• 496 ,, is t)e ,a0i,!,dia,eter o+ gear t)at *anbe s)aed by ra*2 s)aing,et)od.


5/9

ROTARY SHAVING

In Rotary s)aing3 t)e *!tter)as t)e sa,e basi* +or, as

t)e ro!g) *!t gear. T)e teet)

o+ t)e *!tter )ae grooes *!ta*ross t)e 1an2s in -$anes atrig)t ang$es to t)e a0is o+ t)e

*!tter: t)ese grooes +or,

t)e *!tting edges3 b!tbe*a!se on$y a s,a$$ a,o!nto+ ,eta$ bet/een 6;6< and6;65 ,, is to be re,oed.


6/9

GEAR =URNISHING

• =!rnis)ing is a--$ied to !n)ardened gears+or (nis)ing to ery a**!rate di,ensions.

• In t)is ,et)od t)e ,a*)ined gear is ro$$ed

!nder -ress!re /it) t)ree )ardened ,astergears o+ )ig) a**!ra*y and (nis).

• T)o!g) t)e ,et)od -roide s,oot) anda**!rate toot) -ro($e b!t d!e to $o*a$i>ed

resid!a$ stress.• It is ery adisab$e to e,-$oy

t)e ,et)od on -re*ision gears.


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GEAR GRINDING

• Grinding is a ery a**!rate ,et)od and is3t)o!g) re$atie$y e0-ensie3 ,ore /ide$y!sed +or (nis)ing teet) o+ di?erent ty-e andsi>e o+ gears o+ )ard ,ateria$ or )ardeneds!r+a*es.

• Hardened gears are di@*!$t to (nis) bys)aing and b!rnis)ing ,et)ods.

•

i2e gear ,i$$ing3 gear grinding is a$so done on t/o -rin*i-$es

Bi8 For,ing Bii8Generation

3/)i*) is ,ore -rod!*tie and a**!rate


8/9

Gear $a--ing

• T)e ob"e*t o+ e,-$oying t)e $a--ing -ro*ess+or (nis)ing gears is to a*)iee )ig) degreeo+ (nis).

• T)e gear to be (nis)ed a+ter ,a*)ining and)eat treat,ent and een a+ter grinding is r!nin ,es) /it) a gear s)a-ed $a--ing too$ oranot)er ,ating gear o+ *ast iron.

• a--ing *an re,oe ery s,a$$

a,o!nt o+ ,eta$ and *orre*t

s,a$$ errors !- to 6.69,,.


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GEAR HONING

• Gear toot) )oning is a gear (nis)ing -ro*ess t)at i,-roest)e s!r+a*e (nis) o+ t)e toot) -ro($e and red!*es t)e noiseo+ s-!r and )e$i*a$ gears a+ter )eat treat,ent.

• Gear )oning is a (nis)ing ,et)od +or )ardened gears T)egrain si>e o+ t)e abrasie /it) /)i*) it is *)arged is se$e*tedto s!it t)e )oning a$$o/an*e B64679 to 6.69 ,,8 and t)es!r+a*e (nis) reC!ire,ents. T)e /or2 gear is ,es)ed /it)t)e )oning too$ in a *rossed a0is re$ations)i-.

• T)ere is no in +eed ,e*)anis,. T)e gear is r!n in bot) t)edire*tions d!ring t)e -ro*ess.

• Gear toot) )oning *an be *arried o!t /it) eit)er a *onstant-ress!re bet/een teet) o+ t)e gear and )oning too$.

Various Gear Finishing Methods

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