NIST Special PublicationThe Institute, 2002 |
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Page 6
... pulsing . The reason for these variations is that when the droplet was transferred , the instantaneous arc voltage momentarily increased and formed voltage spikes on the peak voltage levels along the peak duration . 6.
... pulsing . The reason for these variations is that when the droplet was transferred , the instantaneous arc voltage momentarily increased and formed voltage spikes on the peak voltage levels along the peak duration . 6.
Page 10
... increases in this zone ' E ' , frequency of droplet detachment decreases at a constant feeding rate of filler metal , resulting in continual increased fluctuations of the arc length . Zone ' F ' In the zone ' F ' , arc breaks because of ...
... increases in this zone ' E ' , frequency of droplet detachment decreases at a constant feeding rate of filler metal , resulting in continual increased fluctuations of the arc length . Zone ' F ' In the zone ' F ' , arc breaks because of ...
Page 17
... . Furthermore , one droplet detachment during peak duration , two droplets detachment during peak duration , and three droplets detachment during peak duration require higher peak energies , increasing in the order given 17.
... . Furthermore , one droplet detachment during peak duration , two droplets detachment during peak duration , and three droplets detachment during peak duration require higher peak energies , increasing in the order given 17.
Page 18
require higher peak energies , increasing in the order given . The highest peak energy of 40.76 J was observed in the case of three droplets detachment during peak duration . 6. The most uniform average current was observed for the ...
require higher peak energies , increasing in the order given . The highest peak energy of 40.76 J was observed in the case of three droplets detachment during peak duration . 6. The most uniform average current was observed for the ...
Page 21
... increased ( Ref . 2-5 ) when steel electrode wire is used . The critical welding currents at which the metal transfer mode changes are defined as transition currents , one of which is the spray transition current at which globular ...
... increased ( Ref . 2-5 ) when steel electrode wire is used . The critical welding currents at which the metal transfer mode changes are defined as transition currents , one of which is the spray transition current at which globular ...
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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
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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.