NIST Special PublicationThe Institute, 2002 |
From inside the book
Results 1-5 of 53
Page 8
... electrode- positive ( DCEP ) polarity . Prior to welding , the oxide film was removed from the base metal by mechanical means . The welding torch was mounted on four - wheeled variable speed tractor ( Esab A2 Mini trac ) . It was moved ...
... electrode- positive ( DCEP ) polarity . Prior to welding , the oxide film was removed from the base metal by mechanical means . The welding torch was mounted on four - wheeled variable speed tractor ( Esab A2 Mini trac ) . It was moved ...
Page 18
... Electrode Positive FPU Pulse frequency ( 1 / T ) TP Peak duration GMAW - P Pulsed Current Gas Metal Arc Welding TD Time between the beginning of the pulse and the second droplet detachment Time between the beginning of the pulse and the ...
... Electrode Positive FPU Pulse frequency ( 1 / T ) TP Peak duration GMAW - P Pulsed Current Gas Metal Arc Welding TD Time between the beginning of the pulse and the second droplet detachment Time between the beginning of the pulse and the ...
Page 21
... electrode wire is used . The critical welding currents at which the metal transfer mode changes are defined as transition currents , one of which is the spray transition current at which globular transfer becomes spray transfer ( Ref ...
... electrode wire is used . The critical welding currents at which the metal transfer mode changes are defined as transition currents , one of which is the spray transition current at which globular transfer becomes spray transfer ( Ref ...
Page 22
... electrode wire . The sine wave pulse with its peak level ( 260 A ) being higher than transition current ( 220-240 A , in this case ) adaptively terminates at the instant of the droplet detachment monitored by the arc voltage sensor ...
... electrode wire . The sine wave pulse with its peak level ( 260 A ) being higher than transition current ( 220-240 A , in this case ) adaptively terminates at the instant of the droplet detachment monitored by the arc voltage sensor ...
Page 23
... electrode wire is 1.2 - mm diameter steel ( AWS standard ER 70S ) and the shielding gas is argon- rich ( 85 % Ar + 15 % CO2 ) . RESULTS AND DISCUSSION According to the static force balance theory ( Ref . 10-12 ) , the forces promoting ...
... electrode wire is 1.2 - mm diameter steel ( AWS standard ER 70S ) and the shielding gas is argon- rich ( 85 % Ar + 15 % CO2 ) . RESULTS AND DISCUSSION According to the static force balance theory ( Ref . 10-12 ) , the forces promoting ...
Contents
3 | |
21 | |
31 | |
39 | |
47 | |
57 | |
71 | |
79 | |
147 | |
155 | |
173 | |
183 | |
203 | |
211 | |
223 | |
233 | |
87 | |
97 | |
105 | |
117 | |
125 | |
137 | |
241 | |
251 | |
265 | |
281 | |
297 | |
317 | |
Other editions - View all
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.