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LAPORAN PRAKTEK
”PENGUJIAN PUNTIR”
DISUSUN OLEH :
NAMA : AZANO DESFIANTO
NIM : 4201417017
KELAS : 4A (TEKNIK MESIN D4)
KELOMPOK : 2
TGL . PRAKTEK : 30 MARET 2016
LABORATORIUM PENGUIAN BAHAN DAN METROLOGI
URUSAN TEKNIK MESIN
POLNEP 2016
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A. TUJUAN
S!"!#$% &!#$''$ *$ &!+,'", -$'",'&/ &$%$,$ *,%$$-'$ *$-$" :
1. M!#$''$ -!$$ -",$.2. M!&$" *,$+$& &&! -", *$ *" -", !++%5$ *$, $%$
',+$ *$ S" 37.
3. M!&$" *,$+$& "!+$+$ -", *$ *" -", -!,,' *$, $%$ ',+$
*$ S" 37.
4. M!+!"$%, &*# '!'$'$ $"$ +!#,, *$, $" $%$.
B. DASAR TEORI
P!+,$ $" $%$ $"$ &$"!,$#/ *$-$" &!&-!+$'$ !!$-$ &!"*! $"$
$$ *$ *!+$ !!$-$ &$$& -!$#$"$. D!+$ -!+,$ 5$+ !!*$ $'$
&!&-!#,%$"'$ %$,# *$ ,&$, 5$+ !!*$ -#$.
D!+$ &!#$''$ &!"*! -!+,$ -", *,&$$ $'$ *,*$-$"'$ :
1. T!+$+$ -", &$',&&.
2. M*# '!'$'$ $"$ +!#,,.
3. S*" -", *$, $%$ 5$+ *,,.U"' -!+,$ &&! -", *,-!#'$ $" &!, 5$+ *, *,$, '% *$
&!&-5$, -,,- '!$ 5$+ !*!%$$ 5$," $#$% $" +5$ (!*$ '!$ *,
,'$" -$*$ $+,$ &!, 5$+ "!"$-. S!*$+'$ + 5$+ #$,5$ *,,'$" -$*$ $+,$
&!, 5$+ *$-$" *,-"$ !%,++$ &!,&#'$ &&! -",.
U"' &!$-$, "$ -!+,$ -", 5$+ !$ *$-$"#$% *,+$'$ !!$-$
& 5$+ *,-$'$, *$#$& -!%,"+$ 8 -!%,"+$ *$#$& -!+#$%$ *$"$.
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Gambar 1. Poros pejal diberi momen punir !"P#
Gambar $. Gra%i& 'ubun(an momen punir dan sudu punir
Gambar ). Gra%i& 'ubun(an e(an(an punir dan sudu punir
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Gambar *. Benu& paa'an du+ile dan brile
Tabel 1. ,ar(a modulus elasisias beberapa ba'an
N !, B!*$ M*# 9+ ( E ) (N&2)
1
2
3
4;
6
7
<
A#&,,&
B$$
B!,
B!" N,'!#
T!&$+$
B!, "$+
K,+$
7/0 = 1010
20 = 1010
21 = 1010
2/3 = 10
10
21 = 1010
11 = 1010
10 = 1010
10 = 1010
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D!+$ *!&,',$ &$'$ &>& 5$+ $'$ *,+$'$ *$#$& -! -!+#$%$
*$"$ $*$#$% :
1. Sudu Punir sesun((u'n-a !#
S*" -", ,, *,*$-$"'$ *!+$ $#$ &!+$+'$ !$ *" 5$+
*,-!%,"+'$ *$, *!#!', (?) 5$+ "!$*, *,$+, -$$+ #!+$ (#) -$*$ &!,
, -", (102 &&)
γ @ θ > θ / *, &$$ θ @ $ "+ 102
X
()
$. Sudu punir Spesi%i& !
#
Φ @ γx L
). Te(an(an Punir ! p#
τ - @ P
P
W
M
2mm
N
@
23
16
mm
N
xd
x M P
π
*. "odulus &e&a&uan !G#
G *$"$ @
21
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. B!$ : 0/; '+ : 1 '+ : 2 '+.
10. Test piece (!*$ ,).
11. S-,*#
D. ESE0A"ATAN ERJA 2
1. P!#$$, %!!" !!#& -$'"!'
2. G$'$ -$'$,$ -$'",'& *$ !-$" '#,".
3. $+$ &!'' *$ &$'$ $'" -$'"!'
4. T$5$'$ -$*$ -!&,&,+ -$'",'& %$#>%$# 5$+ !#& !#$
E. PROSEDUR PER/OBAAN
1. alibrasi.
$. H+'$ '$!# E101 *,+,"$# &!"! *!+$ $ #,",'.
. H+'$ o!t p!t soc$et (P) -$*$ !!#$% '$$ &!, -", *!+$
)inp!t soc$et *,!#$'$+ E*+* digita# &!"!.
. T!'$ s,icth on/ 5$#$ *$ &!''$ #.
*. A" $"$+ *!#!', (H) %,++$ !"#>!"# $"$ *!+$ &!&"$ Le-e#ing
hand ,hee# (G).
!. P,#,% ,",& SI/ *!+$ $$ &!+$" $'#$ SI 8 IMP *, *!-$ E101 *,+,"$#
&!"!.
. G$"+'$ !$ ; '+ -$*$ $"$+ '$#,$, (E) *$ $$ -$*$ E101 *,+,"$#
&!"! 24/; N& (,'$ "!$*, '!$#$%$ ± 0/; N& $"$ 2. B,#$ ",*$'
&!''$ $+'$ "!!" *, $"$ $" .a# %cre, *!+$ &!++$'$
!+ '!,# %,++$ &!''$ $+'$ *, $"$.
+. H,#$+'$ !$ *$ -!,'$ $%$ E101 &!"! '!&$#, '! #.
%. ,'$ ',"$ &!+%!*$', ,"!& ,&-!,$# (#>,) #$+, -!* *, $"$/ %$5$
&!+$" $'#$ -$*$ '!$*$$ IMP *$ $" SI IMP AD ! %,++$
&!''$ $+'$ -$*$ *,+,"$# &!"! 217 #>,.
$. Pen(eesan benda uji
$. U' *,&!, !*$ ,.
. P$$+ !*$ , *!+$ -!$"$$$ '!" !+, !$& -$*$ "$+'$, &$' (T)*$ + "$+'$, -", (). ,'$ $$' (T) *$ () '!-!*!'$ $"$
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'!-$$+$/ -"$ *$ ++# -!+, (K) %,++$ '!* '!&*,$ $"
-,,5$ $&-$, !*$ , "!-$$+ *!+$ $,'.
. S!" $"$+ *!#!', (H) *!+$ &!+$" %$* %!!# (G) '!&*,$ !" dia#
ga!ge (F) -$*$ -,, #.
*. P,#,% -!++$$ ,",& (&!",' $"$ ,&-!,$#) 5$+ $'$ *,+$'$/ *$ $"
-$*$ -!&$$$ # *!+$ &!+$" ad'!sting $no& $"$ scre, *, !#$'$+
E101 *,+,"$# &!"!.
!. P"$ %$* %!!# (M) $&-$, '!" '! *$ !+!#,, *$ &!+,'$" !*$ ,.
K!&*,$ +!$''$ #$+, *!+$ -!#$>-!#$ $&-$, *,+,"$# &!"! &!''$
0/1 N& $"$ 1 #>,.
. A" '$#$ A !+$, *!+$ (S) -$*$ -,, #. %et co!nter -$*$ $+'$
# *!+$ $$ &!&"$ $no& -$*$ + co!nter .
+. S!"!#$% !&$ #/ !'$$+ &#$, &!#$''$ -!+,$ :
1. P"$ hand ,hee# (M) J
• $$ -$*$ '$#$ A.
• $$ !$5$ &&! -", -$*$ *,+,"$# &!"!.
• $$ !$5$ *!#!', -$*$ *,$# +$+! (F).
2. U#$+, !-!", *, $"$ *$ $"$" !&$ *$"$ !",$- -!$&$%$ -"$$/
$&-$, -" !"!#$% ," $$ -$*$ 60 protector sca#e *$ co!ter -$*$ 3600
protector sca#e.
3. E4A0UASI ,ASI0 PRATIU"
1. L$-$ '!#&-' *$"$ %$,# -!+,$
2. L$-$ -!$+$ %$,# -!+,$.
G. JA5AB PERTAN6AAN
1. A-$ "$ *$, -!+,$ -", $%$
$$:
T$ -!+,$ -", $%$ $*$#$% "' &!+!"$%, '!'$"$ -", $"
$%$.
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2. S!"'$ -!!*$$ %$,# -!+,$ -$*$ $%$ /erros *$ /erros
$$:
D$, %$,# -!+,$ -", $%$ ! (ST37) L!,% #$&$ -$"$% *,$*,+'$
$%$ ! (',+$) *,'$!$'$ $%$ ! (ST37) &!+$*+ $5$'
'$*+$ '$ !%,++$ &!&,#,', ,$" 5$+ '!$ *$ +!"$ !*$+'$ $%$
! (',+$) &!+$*+ !*,'," '$ !%,++$ &!&,#,', ,$" 5$+ #!".
3. A-$ 5$+ "!$*, ,#$ &!, , -", ",*$' *,'$#,$,
$$:
A-$,#$ &!, , -", ",*$' *, '$#,$, $'$ &!5!$'$ *,&!, -!,&!
!$% *$, '*,, $$#5$
,. DATA ,ASI0 ANA0SIS
A. UNINGAN
D @12 &&
* @;.40&&
07 $)8 mm
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B!*$ K!$ : ',+$
* @ ;.40 &&
L @ 236 &&
N ϴ
?
(
&
&
)
M- (N&) ϴ ϒ ɸ PƮ G
1 6 0/024 01/20/00023
;
;/76
;
141;/4
4
2/42700
3
0/404;1636
<
2 12 0/02< 02/0/00027
;
11/7
3
2
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B. BA,AN ST )9
B!*$ K!$ : B$$ ST37
* @ 6 &&L @ 23 &&
N ϴ?
(&&)
M-
(N&
)
ϴ ϒ ɸ PƮ G
1 6 0/01 00/;/
0;
;/0
21433/<
0/73720
2
0/122
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12 72 0/034 0/00/00033333
3
71/6
7161/2
13/266
4
0/1
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6 1
32 12 0/03< 11/60/000372;4
11/
64;311/1
17/1030
0/0
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;1 306 0/02 12/20/0002
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4 7 < 2
71 426 0/031 13/40/0003032
2
42;/
7
100;3;/
3
1/7;70
20/04637
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0 ;40 0/0;7 13/60/000;;
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6 ; < 4 ;
110 660 0/0; 14/30/000401
6
6;/
;
1;;7;/<
<
21/0
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12 774 0/03; 14/60/00034313
7
773/
7
1
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2 ; 3
14
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16< 100< 0/044 1;/;0/00043137
3100<
237
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; 3 1 ;
1
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207 1242 0/0;1 16/0 0/000; 124223111/<
<
23/;04
7
0/01
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< ; 1
227 1362 0/047 16/20/0004607<
41362
321431/<
23/
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246 1476 0/03 16/60/0002411
<1476
34
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1 7
266 1;6 0/046 16/6 0/0004;0< 1;63766;;/<
24/47;1
1
0/01;33;2<
<
267 1602 0/047 16/6 0/0004607<4
1602 37
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2
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2 3 4 4
30; 1
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0.00 100.00 200.00 300.00 400.00
0
5
10
15
20
25
30
ST37
Kuningan
I. PENGO0A,AN DATA
/ono' Per'iun(an Daa No 2 *
H$,# -!%,"+$ ',+$ (-"$$ 4)
U'$ -$$+ '!!#%$ L @ 236 &&
D,$&!"! '!,# * @ ;/40 &&
S*" ϴ @ 24
M- @ 4/; N& @ 4;00 N&&
1. Sudu Punir sesun((u'n-a !#
γ @ θ
> θ
/ *, &$$ θ
@ $ "+ 102
X
(
)
Ɵ/@$ "+ 102
032/0
()
θ@ 0/00031
γ @ 24 8 0/00031
γ @ 23/7
Sudu punir Spesi%i& ! #
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Φ @ γx l
Φ @ 23/7 = 236
Φ @ ;663/3
$. Te(an(an Punir! p#
τ - @ P
P
W
M
2mm
N
@
23
16
mm
N
xd
x M P
π
@
234/;14/3164;00
mm N
x x
@ /10126
). "odulus &e&a&uan !G#
G @
2
1
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/ono' Per'iun(an Daa No 2 *
H$,# -!%,"+$ ST37 (-"$$ 4)
U'$ -$$+ '!!#%$ L @ 23 &&
D,$&!"! '!,# * @ 6 &&
S*" ϴ @ 24
M- @
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G @
2
137 *$ ',+$ &!&,#,', ,$" #!". M$"!,$# #!" ,$$5$ &!&-5$,
*$!$% *!&$, -#$", 5$+ #$ *,!"$, -!5!$-$ !!+, 5$+ !$. P$"$% #!"
*,"$*$, *!+$ $*$5$ *!&$, -#$", 5$+ #$ *, !',"$ !"$'$. P!
-!&$$+$ !"$' ,, "!$*, '- #$&$ *$ ,$ *,'$"$'$ "$,#. H$# ,,
&!$*$'$ $%$ &$"!,$# &!#$''$ -!#$$$ "!%$*$- -!&$$+$ !"$'$
'!$#, $-$,#$ "!+$+$ 5$+ "!$*, *,-!!$. K!",'$ *,#$''$ , -",/
-!,&! ST>37 *$ ',+$ -$"$% *, $+,$ -,++,. H$# ,, *,!$'$ '$!$
-!,&! *, $" ,, *,!+'$& *$ $" ,, #$+, *,-",. D$!$% *!'$"
!+'$&$ $'$ "!$*, -!&$"$ "!+$+$ *,&$$ $'$ "!$*, "!+$+$ +!!
&$',&&. M$'$/ -$"$% "!$*, -$*$ $+,$ 5$+ *,'!$, -!&$"$ "!+$+$/ 5$,"
*, $+,$ -,++,. B,#$ ',"$ &!&", *, *$ ,, -!,&!/ -!&$"$ "!+$+$ $'$
!$*$ *, "!+$% -!,&!/ !%,++$ -$"$% $'$ "!$*, *, $+,$ "!+$%. N$&
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$$ ,, ",*$' *,-$'$, '$!$ '!",*$''"$$ *" -",/ !%,++$ *" -",
#," "' *,"!"'$.H$# #$, 5$+ &!5!$'$ -$"$% "!$*, *, -,++, -!,&!
$*$#$% '!$*$$ -!,&! 5$+ ",*$' %&+!. D$, %$,# -!+,$ -", $%$
ST37 #!,% #$&$ -$"$% *,$*,+'$ $%$ ',+$ *,'$!$'$ $%$ ST37
&!+$*+ $5$' '$*+$ '$ !%,++$ &!&,#,', ,$" 5$+ '!$ *$
+!"$ !*$+'$ $%$ ',+$ &!+$*+ !*,'," '$ !%,++$ &!&,#,', ,$"
5$+ #!".
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J. ESI"PU0AN
1. P!+,$ -", !"$ "' &!+!"$%, '!'$"$ -", $" &$"!,$# %,++$
&$"!,$# "!!" -".
2. 0.00 100.00 200.00 300.00 400.00
0
5
10
15
20
25
30
ST37
Kuningan
D,$+$&
&&! -", *$ *" -", !++%5$
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3. 0.00 100.00 200.00 300.00 400.00
0
5
10
15
20
25
30
ST37
Kuningan
D,$+$&
T!+$+$ -", *$ *" -", !++%5$
4. D$, *$"$ -!+$&$"$ *,*$-$" &*# '!'$'$+!#,, 5$,":
• P$*$ ',+$:
G "!, @ 3/7037=1010
G %,"+$ @ 0/37224137
G "!, @ 3/
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• Gambar patahan ST 37
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