NIST Special PublicationThe Institute, 2002 |
From inside the book
Results 1-5 of 51
Page 3
... determine uniformity of average current . Results show that one droplet detachment during peak duration can provide stable weld compared to other types of droplet detachments . This experimental study helped to achieve high - quality ...
... determine uniformity of average current . Results show that one droplet detachment during peak duration can provide stable weld compared to other types of droplet detachments . This experimental study helped to achieve high - quality ...
Page 5
... determine to what extent pulsed current can be used to produce stable Al - Mg alloy welds . EXPERIMENTAL WORK Filler Metal and Base Metal The welding was carried out using solid filler metal ER 5356 Al - Mg alloy having a diameter of ...
... determine to what extent pulsed current can be used to produce stable Al - Mg alloy welds . EXPERIMENTAL WORK Filler Metal and Base Metal The welding was carried out using solid filler metal ER 5356 Al - Mg alloy having a diameter of ...
Page 7
... determine the suitable pulse parameter . The level of arc stability was assessed from the regularity of average current per cycle time . The standard deviation and coefficient of variation of average current were taken as the best ...
... determine the suitable pulse parameter . The level of arc stability was assessed from the regularity of average current per cycle time . The standard deviation and coefficient of variation of average current were taken as the best ...
Page 22
... determine the instant of the droplet detachment . Also , the camera had some limitations , such as the shutter speed and the luminance , which could not meet the needs of imaging and controlling a GMAW weld pool . The objective of this ...
... determine the instant of the droplet detachment . Also , the camera had some limitations , such as the shutter speed and the luminance , which could not meet the needs of imaging and controlling a GMAW weld pool . The objective of this ...
Page 25
... determined by counting the number of image frames and making a simple calculation ) is nearly the same as that of a sine wave pulse ( 500 Hz ) . Compared with the droplet oscillation , the sine wave current has just two and a half ...
... determined by counting the number of image frames and making a simple calculation ) is nearly the same as that of a sine wave pulse ( 500 Hz ) . Compared with the droplet oscillation , the sine wave current has just two and a half ...
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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.