ESCUELA POLITECNICA NACIONAL FACULTAD DE INGENIERÍA MECÁNICA Metrología Practica N° 1 Tema:
Meici!" # Lect$ra co" Cali%re Pie e Re# Objetivos: •
•
Al reali&ar e'ta (r)ctica el e't$ia"te e'tar) e" ca(acia e reali&ar *eicio"e' co" c$al+$ier i"'tr$*e"to +$e te"ga $" ,alor e a(reciaci!" ,ariaoA(arato $tili&ao el Cali%raor Pie e Re# Re #-
Marco Teórico:
Cali%raor Pie e Re# El cali cali%r %ree o .er"ie r"ier/ r/ e' $" i"'t i"'tr$* r$*e" e"to to $til $tili& i&a aoo (ara (ara *eir *eir i*e i*e"' "'io io"e "e'' e o%0e o%0eto to'' relati,a*e"te (e+$eo'/ e'e ce"tí*etro' 2a'ta 3raccio"e' e *ilí*etro'-E' $" i"'tr$*e"to '$*a*e"te elicao # e%e *a"i($lar'e co" 2a%ilia/ c$iao # elicae&aCo*(o"e"te' Co"'ta e $"a regla co" $"a e'c$ara e" $" e4tre*o/ 'o%re la c$al 'e e'li&a otra e'ti"aa a i"icar la *eia e" $"a e'cala- Meia"te (ie&a' e'(eciale' e" la (arte '$(erior # e" '$ e4tre*o/ (er*ite *eir i*e"'io"e' i"ter"a' # (ro3$"iae'S$' e'cala' 'o" o'5 la i"3erior e" *ilí*etro' # la '$(erior e" ($lgaa'/ al ig$al +$e '$' "o"io'-
Parte'5 1- Mora Mora&a' &a' (ara (ara *ei *eia' a' e4ter" e4ter"a'a'6- Mora Mora&a' &a' (ara (ara *ei *eia' a' i"ter" i"ter"a'a'7- A0$ga A0$ga ((ara ara *eia *eia e ((ro3 ro3$" $"ia iae' e'--
89:;<-
E'cala co" i,i'io"e' e" ce"tí*etro' # *ilí*etro'E'cala co" i,i'io"e' e" ($lgaa' # 3raccio"e' e ($lgaaNo"io (ara la lect$ra e la' 3raccio"e' e *ilí*etro'No"io (ara la lect$ra e la' 3raccio"e' e ($lgaa=ot!" e e'li&a*ie"to # 3re"o-
Tipos de Calibradores
A lo' +$e 'e ($ee te"er acce'o/ 'o"5 Pie e Re# e Tor"ero E' $" i"'tr$*e"to +$e 'ir,e (ara *eir i*e"'io"e' li"eale' e e4teriore' e i"teriore'- Co"'ta e $"a regla gra$aa co" o' co"tacto' (er(e"ic$lare' a la regla/ $"o 3i0o # otro *!,il/ 'o%re el >lti*o ,a *o"tao $" "o"io (ara a$*e"tar la re'ol$ci!" e la *eia-
Cali%re e Pro3$"ia E' $" i"'tr$*e"to +$e tie"e $"o' a(o#o' +$e (er*ite" la *eici!" e (ro3$"iae'/ e"talla$ra' # ag$0ero'- Tie"e i'ti"ta' lo"git$e' e %a'e' # ae*)' 'o" i"terca*%ia%le'-
Pie e Re# co" P$"ta' La caracterí'tica (ri"ci(al e e'te cali%re e' +$e '$ *a"í%$la (ara la *eici!" aca%a e" ($"taTa*%i?" e' *$# co",e"ie"te $tili&ar e'te cali%re (ara c$a"o 'e *ie e" &o"a' *$# e'trec2a' e alg$"a (ie&a o"e la *a"í%$la (la"a e $" cali%re "or*al "o e"tre-
Cali%re (ara E"gra"a0e'
E'te cali%re "o' 'er,ir (ara *eir e"gra"a0e' # '$' (arte'/ co*o (or e0e*(lo '$' ie"te'- Tie"e 3or*a e L # $"a *a"í%$laaca%aa e" ($"ta (ara el $'o e '$ *eici!" correcta-
A(li+$e la 3!r*$la e a(reciaci!" (ara "o"io' e 1@/ 6@/ 9@ i,i'io"e' e" el 'i'te*a *?trico/ 3raccio"e' e ($lgaa # *il?'i*a' e ($lgaa/ ae*)' co"cl$#a co" $"a e3i"ici!" e "o"io ge"eralEl Nonio-
El "o"io o e'cala e ,er"ier e' $"a 'eg$"a e'cala a$4iliar +$e tie"e" alg$"o' i"'tr$*e"to' e *eici!"/ +$e (er*ite a(reciar $"a *eici!"co" *a#or (reci'i!" al co*(le*e"tar la' i,i'io"e' e la regla o e'cala (ri"ci(al el i"'tr$*e"to e *eiaF!r*$la e a(reciaci!"5
E0e*(lo'5
Desarrollo de la Práctica
Daa $"a (ie&a i%$0ar # acotar '$' i*e"'io"e' e" letra' # (rocea a *eir caa $"a/ a"ote e" $" c$aro la' *eia' o%te"ia' ta"to e" *ilí*etro' # e" 3racci!" e ($lgaa # *il?'i*a' e ($lgaa-
PIEZA !
A(reciaci!"
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"ecomendaciones
A"te' e reali&ar la *eia la (ie&a/ e"cerar el i"'tr$*e"to e *eici!" e" e'te ca'o el cali%raor (ie e re#/ e' ecir re,i'ar +$e lo' cero' el "o"io e%e" coi"ciir co" lo' cero' e la regla (ri"ci(alRe,i'ar +$e "o e4i'ta 0$ego e4ce'i,o e"tre la regla # el "o"io/ # +$e "o e4i'ta" e3or*acio"e' el)'tica' o co"tracci!" el i"'tr$*e"to e *eici!"Al eter*i"ar la lect$ra reali&arla e 3or*a (er(e"ic$lar a lí"ea' el i"'tr$*e"to e *eia # (or ,ario' o%'er,aore' (ara la o%te"ci!" e $"a *eia *a' e4actaReali&ar la' *eia' e la (ie&a e" $" a*%ie"te aec$ao e 6@ °C e%io a la ilataci!" +$e 'e '$ele (ro$cir e" el i"'tr$*e"to e *eia # a $"a il$*i"aci!" correctaConcl#siones
La o%te"ci!" e la' *eia' e la (ie&a ">*ero ; 'e reali&! co" $" cali%raor (ie e re# e a(reciaci!" e @-@6 *ilí*etro' o @-@@1 *il?'i*a' e ($lgaa/ # ta*%i?" (le"a*e"te #a a"te' e"cerao # co" la' e%ia' (reca$cio"e' # reco*e"acio"e' e'ta"ari&aa'La' *eia' "o 'e o%t$,iero" e" $" a*%ie"te e 6@ °C el c$al e' el reco*e"ao # ta*(oco e" $"a '$(er3icie (la"a e *)r*ol co" $" 'o(orte aec$ao (ara la (ie&a # el $'o aec$ao el i"'tr$*e"to/ 'eg>" lo i"ica" la' "or*a' (ara reali&ar $"a %$e"a *eici!"/ ic2o' ,alore' o%te"io' "o 'er)" correcto' #a +$e lo' 3actore' e4($e'to' a3ecta" e" la *eici!" e la (ie&a-
La ca"tia o%te"ia 3$e la el ,alor *eio # "o la el ,alor real-
$iblio%ra&'a
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