NIST Special PublicationThe Institute, 2002 |
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Page iii
... Formation in VPPAW Prof. R. Kovacevic , SMU , Richardson , Texas ... A3-2 Systems Technology for Variable Polarity Plasma Arc Welding of Aluminum Alloys Dr. B. Zheng , EWI , Columbus , Ohio ........ .... 87 .......... 97 105 Chair : Dr ...
... Formation in VPPAW Prof. R. Kovacevic , SMU , Richardson , Texas ... A3-2 Systems Technology for Variable Polarity Plasma Arc Welding of Aluminum Alloys Dr. B. Zheng , EWI , Columbus , Ohio ........ .... 87 .......... 97 105 Chair : Dr ...
Page 28
... Closed Loop Control for Weld Formation Based on the Front Image Signal of the Keyhole in Variable Polarity Plasma Arc Welding of Aluminum Alloys . Welding Journal 12 : 363s to 371s 31. Agapakis J. E. and Bolstad J .. 1991. Vision 28.
... Closed Loop Control for Weld Formation Based on the Front Image Signal of the Keyhole in Variable Polarity Plasma Arc Welding of Aluminum Alloys . Welding Journal 12 : 363s to 371s 31. Agapakis J. E. and Bolstad J .. 1991. Vision 28.
Page 95
Session A3 : Sensing and Control II : VPPAW MONITORING STABILITY OF KEYHOLE FORMATION IN VPPAW G. Tao , 95.
Session A3 : Sensing and Control II : VPPAW MONITORING STABILITY OF KEYHOLE FORMATION IN VPPAW G. Tao , 95.
Page 97
... formation in variable polarity plasma arc welding ( VPPAW ) . Stability control of weld formation in VPPAW is required . One of the control strategies is to apply feedback control . The key for the successful application of feedback ...
... formation in variable polarity plasma arc welding ( VPPAW ) . Stability control of weld formation in VPPAW is required . One of the control strategies is to apply feedback control . The key for the successful application of feedback ...
Page 98
... formation in VPPAW ( Ref.5 ) . However , it is difficult to precisely monitor the keyhole size by machine vision when the keyhole is very small or very large . A new approach to characterize the presence and the size of the keyhole is ...
... formation in VPPAW ( Ref.5 ) . However , it is difficult to precisely monitor the keyhole size by machine vision when the keyhole is very small or very large . A new approach to characterize the presence and the size of the keyhole is ...
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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
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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.