NIST Special PublicationThe Institute, 2002 |
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Page 5
... variation were calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost- effective , spatter free , high quality ...
... variation were calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost- effective , spatter free , high quality ...
Page 6
... variations in the 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 ...
... variations in the 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 ...
Page 7
... variation . Pulsed Current Signal A typical pulsed current waveform is shown in Fig . 3. Area under every pulsed ... variation of average current were taken as the best measure of the regularity of filler metal melting , during welding ...
... variation . Pulsed Current Signal A typical pulsed current waveform is shown in Fig . 3. Area under every pulsed ... variation of average current were taken as the best measure of the regularity of filler metal melting , during welding ...
Page 9
... variations in the average current for the one droplet detachment during background duration and for the one droplet detachment during peak duration are shown in Fig . 8 and Fig . 9 , respectively . Zone ' D ' The droplet detachment was ...
... variations in the average current for the one droplet detachment during background duration and for the one droplet detachment during peak duration are shown in Fig . 8 and Fig . 9 , respectively . Zone ' D ' The droplet detachment was ...
Page 10
... variation in the mean average current for the two droplets detachment during peak duration . The pulsed current waveform with less variation in the mean average current for the three droplets detachment during peak duration is presented ...
... variation in the mean average current for the two droplets detachment during peak duration . The pulsed current waveform with less variation in the mean average current for the three droplets detachment during peak duration is presented ...
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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.