Electric heating – Metal heating – For bonding with pressure
Reexamination Certificate
2006-12-05
2006-12-05
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
For bonding with pressure
C219S086510
Reexamination Certificate
active
07145097
ABSTRACT:
The present invention provides a servo driven spot welder where an electric servo actuator moves at least one of two electrodes to and away from the workpiece. The servo driven spot welder includes a controller that allows accurate control of the position of one of the electrodes such that fine adjustments may be made during the welding event. A power source is provided in communication with the actuator, the controller and the electrodes whereby the controller controls the delivery of power to the actuator for movement and to the electrodes for welding. A sensing device is provided between the servo drive and the electrode for sensing the load on the electrode during the welding event. The sensing device senses when a weld nugget forms on the workpiece and expands to cause an increase in the load and then becomes plastic to cause a decrease in the load. The controller operates to receive a signal from the sensing device that is indicative of the load change at the electrodes and to stop providing weld power to the electrodes when the weld nugget becomes plastic.
REFERENCES:
patent: 2021477 (1935-11-01), Bohn
patent: 2306593 (1942-12-01), Collom
patent: 2349835 (1944-05-01), Strickland, Jr.
patent: 2415082 (1947-02-01), Hurr
patent: 2472368 (1949-06-01), Cox et al.
patent: 2474816 (1949-07-01), Briggs
patent: 3396260 (1968-08-01), Waltonen
patent: 3889094 (1975-06-01), Needham
patent: 4419558 (1983-12-01), Stiebel
patent: 4447697 (1984-05-01), Dunne et al.
patent: 4473734 (1984-09-01), Henry
patent: 4504725 (1985-03-01), Beneteau
patent: 4517435 (1985-05-01), Humblot
patent: 4550236 (1985-10-01), Nakadate et al.
patent: 4551605 (1985-11-01), Numata et al.
patent: 4684778 (1987-08-01), Cecil
patent: 4771160 (1988-09-01), Pitsch et al.
patent: 4947017 (1990-08-01), Beck
patent: 4985612 (1991-01-01), Izume et al.
patent: 5099099 (1992-03-01), Saito
patent: 5113053 (1992-05-01), Umeda et al.
patent: 5117337 (1992-05-01), Sakuma
patent: 5225647 (1993-07-01), Dufrenne
patent: 5252801 (1993-10-01), Angel et al.
patent: 5254828 (1993-10-01), Stiebel
patent: 5340960 (1994-08-01), Takasaki et al.
patent: 5386092 (1995-01-01), Dufrenne
patent: 5405075 (1995-04-01), Narita et al.
patent: 5412172 (1995-05-01), Ichikawa et al.
patent: 5504297 (1996-04-01), Steibel et al.
patent: 5528011 (1996-06-01), Kono et al.
patent: 5582747 (1996-12-01), Sakai et al.
patent: 5789719 (1998-08-01), Pary et al.
patent: 5928531 (1999-07-01), Sato et al.
patent: 6232572 (2001-05-01), Kanjo
patent: 6271496 (2001-08-01), Domschot
patent: 6596958 (2003-07-01), Chase
Ariel Stiebel, Charles Ulmer, Dietrich Kodrack, Barry Homes, “Monitoring and Control of Spot Weld Operations,” SAE Technical Paper Series #860579, International Congress and Exposition, Detriot, MI, Feb. 24-28, 1986.
Leach Kenneth R.
Pippin, Jr. John R.
Gifford Krass Groh Sprinkle Anderson & Citkowski PC
Milco Manufacturing Co.
Shaw Clifford C.
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