NIST Special PublicationThe Institute, 2002 |
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... functions is to develop , maintain , and retain custody of the national standards of measurement , and provide the means and methods for comparing standards used in science , engineering , manufacturing , commerce , industry , and ...
... functions is to develop , maintain , and retain custody of the national standards of measurement , and provide the means and methods for comparing standards used in science , engineering , manufacturing , commerce , industry , and ...
Page 3
... function , contains essential information about physical phenomena in arc . Therefore , the average current per pulse cycle time was measured from the pulsed current waveforms using AutoCAD 2000 and a self - developed computer software ...
... function , contains essential information about physical phenomena in arc . Therefore , the average current per pulse cycle time was measured from the pulsed current waveforms using AutoCAD 2000 and a self - developed computer software ...
Page 7
... function of various pulsing parameters was useful to understand arc's behavior and this could be correlated to the various types of molten metal droplet detachments . Current , A Time , ms C.WAV ( C.W1 + C . W2 + C.W3 .......... + C.W ) ...
... function of various pulsing parameters was useful to understand arc's behavior and this could be correlated to the various types of molten metal droplet detachments . Current , A Time , ms C.WAV ( C.W1 + C . W2 + C.W3 .......... + C.W ) ...
Page 22
... function of which is to initiate the droplet growth and minimize the energy input to a workpiece . The function of a sine wave pulse following the square pulse is to activate an externally forced oscillation of a droplet before it ...
... function of which is to initiate the droplet growth and minimize the energy input to a workpiece . The function of a sine wave pulse following the square pulse is to activate an externally forced oscillation of a droplet before it ...
Page 39
... function of position around the pipe , but it was found that this feature was unnecessary . Provisions were also made to vary the sensitivity and speed of correction for each weld pass , but this too was found to be unnecessary ...
... function of position around the pipe , but it was found that this feature was unnecessary . Provisions were also made to vary the sensitivity and speed of correction for each weld pass , but this too was found to be unnecessary ...
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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.