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E U R O J O I N 4E U R O J O I N 4DEVELOPMENT OF WELDING AND ALLIEDDEVELOPMENT OF WELDING AND ALLIED
PROCESSES AT THE BEGINNING OF THE NEW MILLENIUMPROCESSES AT THE BEGINNING OF THE NEW MILLENIUM
Cavtat-Dubrovnik, 24-26 May, 2001
CONTRIBUTION TO THE ANALYSIS OF CONTRIBUTION TO THE ANALYSIS OF MATERIAL TRANSFER IN GAS-MATERIAL TRANSFER IN GAS-
SHIELDED METAL-ARC WELDINGSHIELDED METAL-ARC WELDING
by Marjan Subanby Marjan Suban
FOR MORE INFO VISITFOR MORE INFO VISIT http://sites.google.com/site/chaosweld/http://sites.google.com/site/chaosweld/
My web page: http://www2.arnes.si/~msuban1/
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INTRODUCTION TO CHAOSINTRODUCTION TO CHAOS
Deterministic Stochastic
Chaotic
Dynamical systemsDynamical systems
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THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Maps for theMaps for thedripping faucet-dripping faucet-period oneperiod one
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Maps for theMaps for thedripping faucet-dripping faucet-period twoperiod two
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Maps for theMaps for thedripping faucet-dripping faucet-period threeperiod three
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Maps for theMaps for thedripping faucet-dripping faucet-chaoschaos
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Bifurcation diagram for dripping faucetBifurcation diagram for dripping faucet
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
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Material transferMaterial transfer
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF IN GMAWIN GMAW
similarity
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Material transferMaterial transfer
U
I t [ms]
t [ms]
t
c
o k
U
I t [ms]
t [ms]
t
tct
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF IN GMAWIN GMAW
Principle transfer modesin GMAW are:•short-circuit,•globular,•spray.
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SHUNTV
mV
POWERSOURCE
WORKPIECE
+
_ ARC
WIRESHIELDING GAS
LOW-PASSFILTER
ADCOMPUTER
LOW-PASSFILTER
0
100
200
300
400
500
600
t [ms]
I [A
]
0
10
20
30
40
50
0 20 40 60 80 100 120 140 160 180 200
U [V
]
t tO KS
EXPERIMENTAL SETUPEXPERIMENTAL SETUP
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RESULTSRESULTS
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
Welding parameters:Welding parameters:I = 69 AI = 69 AU = 15.6 VU = 15.6 V
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RESULTSRESULTS
Welding parameters:Welding parameters:I = 86 AI = 86 AU = 16.2 VU = 16.2 V
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
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RESULTSRESULTS
Welding parameters:Welding parameters:I = 92 AI = 92 AU = 16.6 VU = 16.6 V
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
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RESULTSRESULTS
Welding parameters:Welding parameters:I = 107 AI = 107 AU = 17.1 VU = 17.1 V
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
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RESULTSRESULTS
Welding parameters:Welding parameters:I = 160 AI = 160 AU = 19.1 VU = 19.1 V
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
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RESULTSRESULTS
Welding parameters:Welding parameters:I = 189 AI = 189 AU = 21.5 VU = 21.5 V
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
t (n)
t (n
+1
)
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CONCLUSIONSCONCLUSIONS
We did not find any chaotic We did not find any chaotic behavior for short-circuit behavior for short-circuit
material transfer in GMAW.material transfer in GMAW.