NIST Special PublicationThe Institute, 2002 |
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Results 1-5 of 47
Page 22
... workpiece . The function of a sine wave pulse following the square pulse is to activate an externally forced oscillation of a droplet before it detaches from the tip of an electrode wire . The sine wave pulse with its peak level ( 260 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 detaches from the tip of an electrode wire . The sine wave pulse with its peak level ( 260 A ) ...
Page 23
... workpiece . At the end of the base period for maintaining an arc , a new cycle repeats the same process . Bead - on - plate welds were made in a flat position on 6.0 - mm thick mild steel plates . The electrode wire is 1.2 - mm diameter ...
... workpiece . At the end of the base period for maintaining an arc , a new cycle repeats the same process . Bead - on - plate welds were made in a flat position on 6.0 - mm thick mild steel plates . The electrode wire is 1.2 - mm diameter ...
Page 47
... workpiece distance ) . Therefore it is generally necessary to weave or rotate the welding torch to intentionally stimulate the differences in the CTWD . With the conventional torch weaving method the upper limit of oscillation frequency ...
... workpiece distance ) . Therefore it is generally necessary to weave or rotate the welding torch to intentionally stimulate the differences in the CTWD . With the conventional torch weaving method the upper limit of oscillation frequency ...
Page 50
... workpiece ( b ) Euqivalent circuit of GMA welding system Figure 3 : Mathematical modeling of GMA welding system Qm / l M 1.2 wire - spray · 1.6 wire - spray Qm / l M A 1.2 wire - globular 1.6 wire - globular 2 3 2 3 Pe ( = w ( S / L ) ...
... workpiece ( b ) Euqivalent circuit of GMA welding system Figure 3 : Mathematical modeling of GMA welding system Qm / l M 1.2 wire - spray · 1.6 wire - spray Qm / l M A 1.2 wire - globular 1.6 wire - globular 2 3 2 3 Pe ( = w ( S / L ) ...
Page 80
... workpiece . Higher order modes of oscillation in the full penetration situation are to be expected in case of a more eccentric position of the arc with respect to the centre of the weld pool [ Ref . 11 ] . However , the amplitude of ...
... workpiece . Higher order modes of oscillation in the full penetration situation are to be expected in case of a more eccentric position of the arc with respect to the centre of the weld pool [ Ref . 11 ] . However , the amplitude of ...
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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.