NIST Special PublicationThe Institute, 2002 |
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Page 3
... droplet detachments , namely one droplet detachment during peak duration , one droplet detachment during background duration , two droplets detachment during peak duration , and three droplets detachment during peak duration have been ...
... droplet detachments , namely one droplet detachment during peak duration , one droplet detachment during background duration , two droplets detachment during peak duration , and three droplets detachment during peak duration have been ...
Page 4
... droplet , this detachment may occur either in peak duration or background duration , and if it is multiple droplet detachment , the detachment may occur in peak duration ( Refs . 4-5 ) . This difference in the timing of droplet ...
... droplet , this detachment may occur either in peak duration or background duration , and if it is multiple droplet detachment , the detachment may occur in peak duration ( Refs . 4-5 ) . This difference in the timing of droplet ...
Page 5
... droplet detachment . Secondly , the average current per pulse cycle time was measured for the various types of droplet detachments and the values of mean , standard deviation , and coefficient of variation were calculated . The optimum ...
... droplet detachment . Secondly , the average current per pulse cycle time was measured for the various types of droplet detachments and the values of mean , standard deviation , and coefficient of variation were calculated . The optimum ...
Page 6
... droplet frequency is well within 5 kHz , the droplet detachment phenomena could be clearly studied from the voltage spikes on the waveforms of pulsed voltage . Data Acquisition The pulsed current was sensed from the power supply and the ...
... droplet frequency is well within 5 kHz , the droplet detachment phenomena could be clearly studied from the voltage spikes on the waveforms of pulsed voltage . Data Acquisition The pulsed current was sensed from the power supply and the ...
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
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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.