Method of electrical resistance spot welding

Details Method of electrical resistance spot welding Method of electrical resistance spot welding

2005-12-09

2008-10-07

Lorengo, Jerry (Department: 1793)

Electric heating

Metal heating

For bonding with pressure

C219S061400, C219S119000

Reexamination Certificate

active

07432466

ABSTRACT:
A method of resistance welding comprising the steps of contacting a metal sheet with an electrode having an initial contact surface area at a force to provide a pressure to the metal sheet applying a current through the electrode to the metal sheet; measuring dimensional changes of the electrode; correlating dimensional changes in the electrode to changes in the initial contact surface area; and adjusting the force to compensate for the changes in the initial contact surface area of the electrode to maintain pressure to the metal sheet. The force may be adjusted by stepping the force to maintain pressure to the faying surface of the metal sheet to be welded. By maintaining the pressure at the faying surface the life cycle of the electrodes may be increased without forming discrepant welds. The current may also be stepped to further extend electrode life.

REFERENCES:
patent: 3592994 (1971-07-01), Ford
patent: 3689731 (1972-09-01), Miller
patent: 4296304 (1981-10-01), Defourny
patent: 4317980 (1982-03-01), Goodrich et al.
patent: 4472620 (1984-09-01), Nied
patent: 4633054 (1986-12-01), Patrick et al.
patent: 4634829 (1987-01-01), Okabe et al.
patent: 4694135 (1987-09-01), Nagel et al.
patent: 4733042 (1988-03-01), Nishiwaki et al.
patent: 4954687 (1990-09-01), Bush et al.
patent: 4972047 (1990-11-01), Puddle et al.
patent: 5302797 (1994-04-01), Yasuyama et al.
patent: 5395687 (1995-03-01), Totsuka et al.
patent: 5409156 (1995-04-01), Tsuji et al.
patent: 5449878 (1995-09-01), Beneteau et al.
patent: 5504299 (1996-04-01), Heckendorn
patent: 5541382 (1996-07-01), Taylor et al.
patent: 5789719 (1998-08-01), Pary et al.
patent: 5906755 (1999-05-01), Arasuna et al.
patent: 6054668 (2000-04-01), Van Otteren et al.
patent: 6198071 (2001-03-01), Kitsunai
patent: 6342686 (2002-01-01), Farrow
patent: 6403913 (2002-06-01), Spinella et al.
patent: 6646221 (2003-11-01), Wang et al.
patent: 2002/0053555 (2002-05-01), Matsuyama
patent: 2005/0045597 (2005-03-01), Wang et al.
patent: 19917896 (1999-10-01), None
patent: 06-007954 (1992-05-01), None
Arrington, Jr., Samuel E., “Twisting Electrodes Improve Tip Life and Weld Quality on Resistance Spot Welded Aluminum Sheet”, SAE Technical Paper Series 950717, Detroit, MI (1995).
Ashton, R.F. & Rager, D.D., “An Arc-Cleaning Approach For Resistance Welding Aluminum”, Welding Journal 55 (9): pp. 750 to 757 (1976).
Boomer, D.R., Hunter, J.A., and Castle, D.R., “A New Approach For Robust High-Productivity Resistance Spot Welding of Aluminum”, SAE Technical Paper 2003-01-0575, Detroit, MI (2003).
Saunders, H.L., Chapter 14 “Resistance Welding”, pp. 14.1-14.13, The Aluminum Association, Welding Aluminum: Theory and Practice, Fourth Edition (2002).
Spinella, D.J. et al: “Trends in Aluminum Resistance Spot Welding for the Auto Industry”, Welding Journal, American Welding Society, Miami, FL, US; vol. 84, No. 1, Jan. 2005, pp. 34-40.
Fukomoto, S. et al: “Effects of Electrode Degradation on Electrode Life in Resistance Spot Welding of Aluminum Alloy 5182”, Welding Journal, American Welding Society, Miami, FL, US, vol. 82, No. 11, Nov. 2003, pp. 307-312.

Affiliated with

Also associated with

Rating

Method of electrical resistance spot welding 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 of electrical resistance spot welding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of electrical resistance spot welding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3992865