Electric heating – Metal heating – For bonding with pressure
Reexamination Certificate
2007-07-17
2007-07-17
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
For bonding with pressure
Reexamination Certificate
active
11148733
ABSTRACT:
A method for estimating weld nugget diameter includes receiving current and voltage inputs, a time input, and a force input. In certain embodiments, the method also uses other weld parameters including type of material, type of stack, stack thickness, applied force, preheat current, RMS value of weld current, weld level, and weld time. The method further determines a resistance curve based on the current and voltage inputs, and time input. It also derives parameters from the resistance curve, and determines a weld nugget diameter estimate based on both resistance parameters.
REFERENCES:
patent: 4596917 (1986-06-01), Nied et al.
patent: 5343011 (1994-08-01), Fujii et al.
patent: 5450315 (1995-09-01), Stefanski
patent: 5764859 (1998-06-01), Kim et al.
patent: 5892197 (1999-04-01), Goto et al.
patent: 6018729 (2000-01-01), Zacharia et al.
patent: 6130396 (2000-10-01), Hasegawa et al.
patent: 6140825 (2000-10-01), Fujii et al.
patent: 6506997 (2003-01-01), Matsuyama
patent: 6518536 (2003-02-01), Fujii et al.
patent: 2004/0073319 (2004-04-01), Monari
Garza and M. Das, “On Real Time Monitoring and Control of Resistance Spot Welds Using Dynamic Resistance Signatures,” Proceedings of IEEE Midwest Symposium on Circuits and Systems, Jun. 2001.
Welding Handbook, Fourth Edition, Section Two, vol. 2, “Gas, Arc and Resistance Welding Processes,” Edited by Arthur L. Phillips, American Welding Society, New York, 1957-1962.
S. A. Gedeon, C. D. Sorenson, K. T. Ulrich, and T. W. Eager, “Measurment of dynamic electrical and mechanical properties of resistance spot welds,”Welding Journal, vol. 66, #12, pp. 378s-385s, Dec. 1987.
F. Garza and M. Das, “Indentification of time-varying resistance during welding,” Proceedings of IEEE IMTC conference, Baltimore, Maryland, 2000.
W. Li, S. Cheng, S. J. Hu and J. Shriver, “Statistical investigation on resistance spot welding quality using a two-state, sliding-level experiment,” Journal of manufacturing Science and Engineering, vol. 123, Aug. 2001, pp. 513-520.
Das Manohar
Fernandez Vernon
Grzadzinski Gerald
Strausbaugh James W.
DaimlerChrysler Corporation
Shaw Clifford C.
Smith Ralph E.
LandOfFree
Method for estimating nugget diameter and weld parameters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for estimating nugget diameter and weld parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for estimating nugget diameter and weld parameters will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3767510