Weld Pool Oscillation for Penetration Sensing and Control |
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Page 46
... arc length and the geometry of the electrode . • Helium rather than argon should be used as shielding gas : the electric field strength in an helium arc is higher ( 1-4 V / mm ) than in an argon arc ( 0.5-1 V / mm ) , which makes the ...
... arc length and the geometry of the electrode . • Helium rather than argon should be used as shielding gas : the electric field strength in an helium arc is higher ( 1-4 V / mm ) than in an argon arc ( 0.5-1 V / mm ) , which makes the ...
Page 77
... arc length becomes shorter , although this problem can be dealt with by applying AVC ( Arc Voltage Control ) instead of mechanical arc length control [ 6.5 ] , as used in the present experiments . An advantage of downward welding is the ...
... arc length becomes shorter , although this problem can be dealt with by applying AVC ( Arc Voltage Control ) instead of mechanical arc length control [ 6.5 ] , as used in the present experiments . An advantage of downward welding is the ...
Page 134
... arc length becomes increasingly smaller due to the forward flow of the weld pool between torch and workpiece ( see Fig . 6.3 ) . As the arc length is linearly related to the arc voltage , this implies that without correction the heat ...
... arc length becomes increasingly smaller due to the forward flow of the weld pool between torch and workpiece ( see Fig . 6.3 ) . As the arc length is linearly related to the arc voltage , this implies that without correction the heat ...
Common terms and phrases
500 frequency Hz AISI arc current arc length arc welding backface base current chapter cold wire supply convection correct penetration correction current step current pulses doorlassing equation Fast Fourier Transform feedback control feedback system flow frequency analysis frequency distribution frequency spectrum full penetration function GTAW heat input in-process intensity a.u. IPPC IPPC system l/min liquid metal mm/s mode 3 oscillation orbital tube welding orbital welding oscillation behavior oscillation frequency oscillation mode partial penetration penetration control penetration sensing penetration to overpenetration pool diameter pulse current pulsed GTA welding pulsed welding purging gas rotation sample seam sensing and control sensor shielding gas situation spot welding sum frequency surface tension temperature TIG welding torch total cycle travel speed tungsten tuning factor voltage and arc wall thickness wave weld bead weld penetration weld pool oscillation welding conditions welding current Welding Journal welding position welding process welding with cold workpiece