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You searched on: Author: timothy quinn

Displaying records 21 to 28.
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21. GMAW Wire Feedability: A Friction Model
Published: 7/1/2003
Authors: A Padilla, D. R. Munoz, Timothy P Quinn, R. A. Rorrer
Abstract: A Hertzian-based contact model of the friction between the welding wire and the wire liner has been developed to predict the wire pulling force for gas metal arc welding (GMAW). The model predicts a 2.5:1 exponential increase inwire pulling force as ...

22. An Experimental Method for Measuring Mechanical Properties of Rat Pulmonary Arteries Verified With Latex
Series: Journal of Research (NIST JRES)
Published: 6/1/2003
Authors: Elizabeth S Drexler, Andrew J Slifka, J Wright, Christopher N McCowan, Dudley Finch, Timothy P Quinn, J D McCloskey, Dunbar Ivy, Robin Shandas
Abstract: A study of the biomechanics and hemodynamics of pulmonary hypertension is incomplete without including mechanical properties data comparing healthy and diseased arterial tissue. In the initial stabe of this study, Sprague-Dawley rats will be induced ...

23. XML for Exchange of Weld Inspection Results
Published: 4/1/2003
Authors: William G Rippey, Timothy P Quinn, John L Michaloski
Abstract: TECHNICAL SUMMARYIntroduction/Background SectionA system to demonstrate the transfer of weld inspection data between computer programs is described in this paper. The goal is effortless flow of the data between multi-vendor welding software applicat ...

24. Process Sensitivity of GMAW: Aluminum vs. Steel
Published: 4/1/2002
Author: Timothy P Quinn
Abstract: A heat-transfer model of the melting electrode in gas metal are welding (GMAW) was used to compare the relative sensitivity of the process when welding with aluminum electrodes compared to that of steel electrodes. The aluminum model was verified wi ...

25. Contact Tube Temperature During GMAW
Published: 12/1/2001
Authors: G Adam, Thomas A. (Thomas A.) Siewert, Timothy P Quinn, D P Vigliotti
Abstract: The rate of heating and the maximum temperature reached by the contact tube during gas metal arc welding (GMAW) is quantified. We studied the effect of changes in the contact-tube-to-work distance (CTWD), voltage, welding wire feed speed, gas flow r ...

26. A Welding Cell With Its Own Web Site
Published: 1/1/2000
Author: Timothy P Quinn
Abstract: Communications technology is allowing welding engineers to interact in the operation of a welding cell from a distance, as if they were physically present. The remote engineer can look at the weld, watch the robot motion, read front panel displays a ...

27. A Welding Cell That Supports Remote Collaboration
Published: 9/30/1999
Authors: James D Gilsinn, William G Rippey, Joseph A Falco, Timothy P Quinn, Robert Russell, Keith A Stouffer
Abstract: Discrete part manufacturers using robotic arc welding cells often have several more geographically distributed plants than welding experts. This ratio often leads to costly downtimes due to both logistic and communication deficiencies between weld ...

28. Through-the-Arc Detection of Weld Defects in Pulsed GTAW
Published: 3/1/1998
Authors: Timothy P Quinn, D C Oakley
Abstract: A through-the-arc sensing system was used to detect defects in the welding of thin-walled stainless-steel tubing. It measures the process current and voltage and passes the resulting signals through a signal processing algorithm. The arc condition ...

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