NIST Special PublicationThe Institute, 2002 |
From inside the book
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Page 3
... peak duration ( Tp ) , background current ( IB ) , background duration ( TB ) , welding speed ( Ws ) , and wire feed speed ( WF ) . Selecting the most suitable GMAW - P parameter is very complex due to interdependence of parameters ...
... peak duration ( Tp ) , background current ( IB ) , background duration ( TB ) , welding speed ( Ws ) , and wire feed speed ( WF ) . Selecting the most suitable GMAW - P parameter is very complex due to interdependence of parameters ...
Page 4
... Peak duration -Background duration Peak duration -Background duration A verage current Spray current level Background_ current Time , ms a ) Pulsed current Peak current Voltage , V Background voltage b ) Pulsed voltage Time , ms Ip - Peak ...
... Peak duration -Background duration Peak duration -Background duration A verage current Spray current level Background_ current Time , ms a ) Pulsed current Peak current Voltage , V Background voltage b ) Pulsed voltage Time , ms Ip - Peak ...
Page 5
... peak duration , and cycle time can be vary over the ranges 10 to 40V , 10 to 30V , 1 to 15ms and 3.3 to 50 ms , respectively . Direct setting of levels at peak and background current is not possible with the welding power supply used in ...
... peak duration , and cycle time can be vary over the ranges 10 to 40V , 10 to 30V , 1 to 15ms and 3.3 to 50 ms , respectively . Direct setting of levels at peak and background current is not possible with the welding power supply used in ...
Page 6
... peak voltage values along the peak duration apart from those owing to the intentional pulsing . The reason for these variations is that when the droplet was transferred , the instantaneous arc voltage momentarily increased and formed ...
... peak voltage values along the peak duration apart from those owing to the intentional pulsing . The reason for these variations is that when the droplet was transferred , the instantaneous arc voltage momentarily increased and formed ...
Page 7
on the peak voltage levels along the peak duration . Droplet detachment time and the number of droplet detachments were obtained from the pulsed voltage traces . Stored waveforms of pulsed current and voltage were transferred from the ...
on the peak voltage levels along the peak duration . Droplet detachment time and the number of droplet detachments were obtained from the pulsed voltage traces . Stored waveforms of pulsed current and voltage were transferred from the ...
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Common terms and phrases
algorithm analysis angular distortion arc length arc voltage average current background duration boundary butt weldment calculated camera coefficient of variation detachment during peak developed droplet detachment dynamic effect electrode equation experimental Figure filler metal Friction Stir Welding geometry GMAW GMAW-P GTA weld GTAW hoop stress increase interface keyhole laser machine vision martensite material measured mechanical melting metal arc welding method microstructure mm/min mm/s mode molten pool monitoring NIST oscillation frequency peak duration penetration plasma arc welding plate predicted procedure pulsed current resetting residual stress robot rotational sensor shear stress shown in Fig splash strain structure surface technique Technology thermal types of droplet variation VPPAW waveform weld diameter weld fixture weld joint weld pool weld quality welding current Welding Journal welding parameters welding power supply welding process welding simulation welding speed width wire feed speed workpiece zone
Popular passages
Page ii - Certain commercial equipment, instruments, or materials are identified in this paper in order to adequately specify the experimental procedure. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.
Page 94 - Proceedings of the institution of Mechanical Engineers; Part B: Journal of Engineering Manufacture, Vol. 207, pp.9- 1 4, 1 993 [4] Soar RC and Dickens, PM, "Design of Laminated Tooling for High Pressure Die -Casting," Proceedings-SPIE The international society for Optical Engineering, pp.
Page 123 - Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy.