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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/
INTRODUCTION TO CHAOSINTRODUCTION TO CHAOS
Deterministic Stochastic
Chaotic
Dynamical systemsDynamical systems
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Maps for theMaps for thedripping faucet-dripping faucet-period oneperiod one
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Maps for theMaps for thedripping faucet-dripping faucet-period twoperiod two
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Maps for theMaps for thedripping faucet-dripping faucet-period threeperiod three
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Maps for theMaps for thedripping faucet-dripping faucet-chaoschaos
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Bifurcation diagram for dripping faucetBifurcation diagram for dripping faucet
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF THE DRIPPING FAUCETTHE DRIPPING FAUCET
Material transferMaterial transfer
THE CHAOTIC BEHAVIOR OF THE CHAOTIC BEHAVIOR OF IN GMAWIN GMAW
similarity
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.
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
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
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
)
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
)
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
)
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
)
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
)
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.