NIST Special PublicationThe Institute, 2002 |
From inside the book
Results 1-5 of 52
Page 6
... shown in Fig . 2. Totally , two filters were designed and fabricated . The first one was used for the pulsed voltage signal and the second one for the pulsed current signal . These filters permit frequencies below 5 kHz to pass but ...
... shown in Fig . 2. Totally , two filters were designed and fabricated . The first one was used for the pulsed voltage signal and the second one for the pulsed current signal . These filters permit frequencies below 5 kHz to pass but ...
Page 7
... Figure 3 : Measurement of average current for each pulse cycle time , and calculation of the standard deviation and coefficient of variation . Pulsed Current Signal A typical pulsed current waveform is shown in Fig . 3. Area under every ...
... Figure 3 : Measurement of average current for each pulse cycle time , and calculation of the standard deviation and coefficient of variation . Pulsed Current Signal A typical pulsed current waveform is shown in Fig . 3. Area under every ...
Page 8
... shown in Fig . 4 . Zone ' A ' In the zone ' A ' a large droplet is formed and arc behavior becomes unstable accompanied by short circuits ( Fig . 5 ) , erratic droplet detachment , and much spatter , because the electromagnetic force ...
... shown in Fig . 4 . Zone ' A ' In the zone ' A ' a large droplet is formed and arc behavior becomes unstable accompanied by short circuits ( Fig . 5 ) , erratic droplet detachment , and much spatter , because the electromagnetic force ...
Page 9
... shown in Fig . 8 and Fig . 9 , respectively . Zone ' D ' The droplet detachment was apparently the spray type in the zone ' D ' . Where Ip > 168A and Tp > Tp max . In this multiple droplet detachment zone , either two droplets ( Fig ...
... shown in Fig . 8 and Fig . 9 , respectively . Zone ' D ' The droplet detachment was apparently the spray type in the zone ' D ' . Where Ip > 168A and Tp > Tp max . In this multiple droplet detachment zone , either two droplets ( Fig ...
Page 22
... shown in Fig . 1. The period of pulse consists of a square wave form and a sine wave form with a pre - selected frequency . The peak current for a square pulse is experimentally set at around 160 A that is below the spray transition ...
... shown in Fig . 1. The period of pulse consists of a square wave form and a sine wave form with a pre - selected frequency . The peak current for a square pulse is experimentally set at around 160 A that is below the spray transition ...
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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.