18787028 Drilling Related Operations

8/13/2019 18787028 Drilling Related Operations

http://slidepdf.com/reader/full/18787028-drilling-related-operations 1/18



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+

Intr"#'t%n

Drilling is most common singlemc!ining o"ertion

Drilling m#es $" %' o( mc!ining

Drilling occ$rs t t!e en) o( tool*it!in t!e mteril+ (o$r ctions t#e"lce t!e )rill ti"

A smll !ole is (orme) ,- t!e e.c!i"s re not c$t !ere in t!e normlsense/

C!i"s re (orme) ,- t!e rotting %p$/

C!i"s re remo0e) (rom t!e !ole ,- t!escre* ction o( t!e he%'a !#te$/

T!e )rill is g$i)e) ,- an"$ or mrginst!t r$, ginst t!e *lls o( t!e !ole





Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+/

Nmen'at#re an" Gemetr ! a T%$t Dr%

T!ree min com"onents re t!e1

S!n#

Bo)-

Point

Shan1 2 T!is is t!e "ortion *!ic! is 3clm"e)4 to "ro0i)e t!e )ri0e/ Strig!ts!n# (or )rill $" to 54/ S!n# is e6$l to,o)- )imeter/ A,o0e 54+ s!n# cn ,et"ere) or re)$ce)/

2"

Fl$tes 2 Helicl groo0es c$t ro$n) t!e,o)- *!ic! (orm t!e c$tting e)ges

Allo* coolnt to (lo* to t!e c$ttinge)ge

Allo* c!i"s to ,e *it!)r*n

Mrgin2 Nrro* rise) section o( t!e,o)-/ Pro0i)es ($ll ,o)- to !ole s$""ort

to !el" #ee" it ligne) s it )rills/ Bo)- clernce 2 Re)$ce) section o( t!e

)rill ,et*een t!e (l$tes n) mrgin/Use) to re)$ce (riction ,et*een )rill n)*or#"iece



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+

4e- T!in section in t!e center o(t!e )rill *!ic! (orms 3core4 (or

t!e )rill/ T!is (et$re increses sit e7ten)s to t!e s!n#/ Forms t!ec!isel e)ge o( t!e )rill/

P%nt 2 C!isel e)ge o( t!e )rill/

T!e $p%ra+ or rte o( t*ist in t!e)rill+ controls t!e rte o( c!i"remo0l in )rill/ A (st s"irl )rill

is $se) in !ig! (ee) rte""lictions $n)er lo* s"in)les"ee)s+ *!ere remo0l o( lrge0ol$me o( s*r( is re6$ire)/ Lo*s"irl )rills re $se) in c$tting""lictions *!ere !ig! c$ttings"ee)s re tr)itionll- $se)+ n)

*!ere t!e mteril !s ten)enc-to gll on t!e )rill or ot!er*ise clogt!e !ole+ s$c! s l$min$m orco""er/



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+5

T!e p%nt an(e is )etermine) ,-t!e mteril t!e )rill *ill ,e o"erting

in/ Hr)er mterils re6$ire lrger"oint ngle+ n) so(ter mterilsre6$ire s!r"er ngle/ T!e correct"oint ngle (or t!e !r)ness o( t!emteril controls *n)ering+ c!tter+!ole s!"e+ *er rte+ n) ot!erc!rcteristics/

T!e %p an(e )etermines t!e

mo$nt o( s$""ort "ro0i)e) to t!ec$tting e)ge/ A greter li" ngle *illc$se t!e )rill to c$t moreggressi0el- $n)er t!e sme mo$nto( "oint "ress$re s )rill *it! smller li" ngle/ Bot! con)itions cnc$se ,in)ing+ *er+ n) e0ent$l

ctstro"!ic (il$re o( t!e tool/ T!e"ro"er mo$nt o( li" clernce is)etermine) ,- t!e "oint ngle/



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+6

Ca$$%!%'at%n$

Ca$$%!%'at%n 2a$e" n Cn$tr#'t%n Soli) Drills1 T!ose m)e o( one "iece o( mteril s$c! s !ig! s"ee) steel

Ti""e) Soli) Drills1 T!ose !0ing ,o)- o( one mteril *it! c$tting li"s m)e o(not!er mteril ,r8e) or ot!er*ise ,on)e) in "lce

Com"osite Drills1 T!ose !0ing c$tting "ortions mec!nicll- !el) in "lce

Ca$$%!%'at%n 2a$e" n 7eth"$ ! H"%n( r Dr%8%n( Strig!t S!n# Drills1 T!ose !0ing c-lin)ricl s!n#s *!ic! m- ,e t!e sme or

)i((erent )imeter t!n t!e ,o)- o( t!e )rill9 t!e s!n#s m- ,e m)e *it! or

*it!o$t )ri0ing (lts+ tng+ groo0es or t!re)s T"er S!n# Drills1 T!ose !0ing conicl s!n#s s$it,le (or )irect (itting into

t"ere) !oles in mc!ine s"in)les+ )ri0ing slee0es or soc#ets9 t"ere) s!n#sgenerll- !0e )ri0ing tng

T"er S!n# S6$re Drills1 T!ose !0ing t"ere) s!n#s *it! (o$r (lt si)es (or(itting rc!et or ,rce

S!ell Core Drills1 Core )rills mo$nt,le on r,ors s"eci(icll- )esigne) (or t!e

"$r"ose9 commonl- $se) *it! s!ell remer r,ors







Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+)0

C#tt%n( T$ !r Dr%%n( Operat%n$

Step Dr%1 A m$lti"le )imeter )rill *it! oneset o( )rill ln)s *!ic! re gro$n) to )i((erent)imeters

G#n Dr%1 A g$n )rill is $se) (or )rilling )ee"!ole/ All g$n )rills re strig!t2(l$te)+ n)ec! !s single c$tting e)ge/ A !ole in t!e,o)- cts s con)$it to trnsmit coolnt$n)er consi)er,le "ress$re to t!e ti" o( t!e)rill/

Gun drill with holes for coolant

Step drill: for ste""e) !oles

Center Dr%1 Center )rill ,its re $se) in metl*or#ing to"ro0i)e strting !ole (or lrger2si8e) )rill ,it or to m#e conicl in)enttion in t!e en) o( *or#"iece in *!ic! tomo$nt lt!e center/ In eit!er $se+ s t!e )rill is eit!erest,lis!ing t!e center o( !ole or m#ing conicl !ole(or lt!e center/ Ho*e0er+ t!e tr$e "$r"ose o( center)rill is t!e ltter ts#+ *!ile t!e (ormer ts# is ,est )one

*it! s"otting )rill/



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+))

Operat%n$ Reate" t Dr%%n(

Ream%n(1 Reming is $se) to slig!tl- enlrge !ole+ to

"ro0i)e ,etter tolernce on its )imeter n) to im"ro0e itss$r(ce (inis!/ T!e tool is clle) remer n) it $s$ll- !sstrig!t (l$tes/

Tapp%n(1 T!is o"ertion is "er(orme),- n t" n) is $se) to "ro0i)einternl scre* t!re)s on n e7isting!ole/

C#nterr%n(1 Co$nter,oring "ro0i)es ste""e) !ole+ in

*!ic! lrger )imeter (ollo*s smller )imeter "rtill-into t!e !ole/ A co$nter,oring !ole is $se) to set ,olt !e)sinto !ole so t!e !e)s )o not "rotr$)e ,o0e t!e s$r(ce/



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+)

Operat%n$ Reate" t Dr%%n(

C#nter$%n1%n(1 T!is is similr to Co$nter,oring+ e7ce"t

t!t t!e ste" in t!e !ole is cone2s!"e) (or (lt !e) scre*sn) ,olts/

Spt!a'%n(1 S"ot(cing is similr to milling/ It is $se) to"ro0i)e (lt mc!ine) s$r(ce on t!e *or#"rt in locli8e)re/

Center%n(1 Also clle) center )rilling+

t!is o"ertion )rills strting !ole tocc$rtel- est,lis! its loction (ors$,se6$ent )rilling/ T!is tool is clle) center)rill/




Dr%$ an" Dr%%n( Operat%n$



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+)/

Dr% Pre$$

A )rill "ress is "re(er,le to !n) )rill*!en t!e loction n) orienttion o( t!e

!ole m$st ,e controlle) cc$rtel-/ A)rill "ress is com"ose) o( ,se t!ts$""orts col$mn+ t!e col$mn in t$rns$""orts t,le/ <or# cn ,e s$""orte)on t!e t,le *it! 0ise or !ol) )o*nclm"s+ or t!e t,le cn ,e s*i0ele) o$to( t!e *- to llo* tll *or# to ,e

s$""orte) )irectl- on t!e ,se/ Heig!t o(t!e t,le cn ,e )=$ste) *it! t,le li(tcrn# t!n loc#e) in "lce *it! t,leloc#/ T!e col$mn lso s$""orts !e)contining motor/ T!e motor t$rns t!es"in)le t s"ee) controlle) ,-

0ri,le s"ee) control )il/ T!e s"in)le!ol)s )rill c!$c# to !ol) t!e c$ttingtools :)rill ,its+ center )rills+ )e,$rringtools+ etc/;/



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+)

Spe'%a%;e" Dr% Pre$$e$

Gan(-"r%%n( ma'h%ne$1 in)e"en)ent col$mns+ ec! *it! )i((erent )rillingo"ertion+ *or# "iece sli) (rom one col$mn to ne7t

T#rret-tpe, #pr%(ht "r%%n( ma'h%ne$1 $se) *!en n$mero$s )rilling o"ertionre re6$ire) in r"i) s$ccession+ t$rret rottes nee)e) tool into "osition (or ec!o"ertion

Gng2)rilling mc!ines T$rret2t-"e+ $"rig!t )rilling mc!ines




Spe'%a%;e" Dr% Pre$$e$

Ra"%a "r%%n( ma'h%ne$1 $se) on lrge *or#"ieces+ s"in)le mo$nts on r)il rm+llo*ing )rilling o"ertions n-*!ere long t!e rm lengt!

7#t%pe-$p%n"e "r%%n( ma'h%ne$1 Single "o*er!e) o"ertes m$lti"le s"in)lesen,ling m$lti"le !oles t one time+ ec! !ole cn ,e $ni6$e

R)il )rilling mc!ines M$lti"le2s"in)le )rilling mc!ines




S#mmar

Drilling is t!e most common mc!ining o"ertion

Drilling cn ,e "er(orme) on n$m,er o( mc!ine tools+)rill "resses re s"ecili8e) mc!ine tools (or )rillingonl-

Drills come in *i)e 0riet- o( t-"es n) ti" geometries)e"en)ing $"on "ro)$ction rte n) cc$rc- nee)e)

Hole geometries cn ,e )=$ste) t!ro$g! t!e $se o(co$nter,oring+ co$ntersin#ing n) reming



Department ! In"#$tr%a & Pr"#'t%n En(%neer%n( )*+)*

?

<#e$t%n$

18787028 Drilling Related Operations

Documents