NIST Special PublicationThe Institute, 2002 |
From inside the book
Results 1-5 of 55
Page 5
... obtain the desired peak and background current levels , which were measured using high speed , double - channel , digital storage oscilloscope . The peak duration , wire feed speed , and cycle time could be independently adjusted using ...
... obtain the desired peak and background current levels , which were measured using high speed , double - channel , digital storage oscilloscope . The peak duration , wire feed speed , and cycle time could be independently adjusted using ...
Page 7
... obtained from the pulsed voltage traces . Stored waveforms of pulsed current and voltage were transferred from the oscilloscope to a personal computer and saved for later analysis . The personal computer was equipped with the General ...
... obtained from the pulsed voltage traces . Stored waveforms of pulsed current and voltage were transferred from the oscilloscope to a personal computer and saved for later analysis . The personal computer was equipped with the General ...
Page 8
... obtain a good quality weld were selected on the basis of uniformity of average current . RESULTS AND DISCUSSION The improvement of arc stability in GMAW - P through optimization of the control parameters can extend the operational range ...
... obtain a good quality weld were selected on the basis of uniformity of average current . RESULTS AND DISCUSSION The improvement of arc stability in GMAW - P through optimization of the control parameters can extend the operational range ...
Page 10
... obtain two droplets detachment during peak , and average peak energy of 30.7 J was required in the case of three droplets detachment during peak . Fig . 12 shows a typical pulsed current waveform with less variation in the mean average ...
... obtain two droplets detachment during peak , and average peak energy of 30.7 J was required in the case of three droplets detachment during peak . Fig . 12 shows a typical pulsed current waveform with less variation in the mean average ...
Page 11
... obtained at various pulsing conditions and grouped in Region - 1 , Region - 2 , Region - 3 , and Region - 4 . Good correlation was obtained between the standard deviation of average current and peak energy , and between the coefficient ...
... obtained at various pulsing conditions and grouped in Region - 1 , Region - 2 , Region - 3 , and Region - 4 . Good correlation was obtained between the standard deviation of average current and peak energy , and between the coefficient ...
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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.