NIST Special PublicationThe Institute, 2002 |
From inside the book
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Page 26
... boundary located at the rear part of a weld pool can not be clearly identified because of its convex shape . The image of a weld pool from the front view satisfies the requirements needed for image processing , even though a brighter ...
... boundary located at the rear part of a weld pool can not be clearly identified because of its convex shape . The image of a weld pool from the front view satisfies the requirements needed for image processing , even though a brighter ...
Page 27
... boundary extraction and area calculation and provides the possibility for real time quantifiable monitoring and control of the weld pool penetration state in the future . ACKNOWLEDGEMENT The author expresses his great acknowledgement to ...
... boundary extraction and area calculation and provides the possibility for real time quantifiable monitoring and control of the weld pool penetration state in the future . ACKNOWLEDGEMENT The author expresses his great acknowledgement to ...
Page 51
... boundary in the vicinity of arc with reasonable accuracy ( Ref . 8 ) . A quasi - steady conduction model was used for calculation of the CTWD during high - speed arc rotation . Welding current waveforms were simulated by solving the ...
... boundary in the vicinity of arc with reasonable accuracy ( Ref . 8 ) . A quasi - steady conduction model was used for calculation of the CTWD during high - speed arc rotation . Welding current waveforms were simulated by solving the ...
Page 87
... boundary of the molten pool is extracted . Because the molten pool is partially hidden by the tungsten electrode , its boundary is incomplete . The molten pool area is selected as the feedback to the closed - loop control of the GTAW ...
... boundary of the molten pool is extracted . Because the molten pool is partially hidden by the tungsten electrode , its boundary is incomplete . The molten pool area is selected as the feedback to the closed - loop control of the GTAW ...
Page 88
... boundary of the molten pool is extracted from the binary image . The molten pool size and shape in the hybrid RP & T are strongly influenced by the two- dimensional geometrical features of the part to be built . Fig . 1 demonstrates the ...
... boundary of the molten pool is extracted from the binary image . The molten pool size and shape in the hybrid RP & T are strongly influenced by the two- dimensional geometrical features of the part to be built . Fig . 1 demonstrates the ...
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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.