Electric heating – Metal heating – For bonding with pressure
Reexamination Certificate
2006-10-31
2006-10-31
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
For bonding with pressure
C219S098000
Reexamination Certificate
active
07129437
ABSTRACT:
The invention relates to a method of monitoring the welding operation in a stud welding process, wherein a part (19) to be welded is immersed into the melt by moving the part (5) towards a workpiece (17), with a physical quantity depending on the force required for moving the part (5) being measured at least during the phase of immersion of the part (19) to be welded into the melt and the measured gradient of the physical quantity plotted against time being compared with a predetermined set gradient. Furthermore, the invention relates to a stud welding device for carrying out such a method.
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patent: 5406044 (1995-04-01), Killian et al.
patent: 5977506 (1999-11-01), von Daniken
patent: 6011234 (2000-01-01), Kirchner et al.
patent: 4314528 (1994-11-01), None
patent: 4437264 (1996-04-01), None
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English abstract for German document No. DE20006636U1.
Citrich Ulrich
Kirchner Eduard
Madsak Jürgen
Gifford, Krass, Groh Sprinkle, Anderson & Citkowski, P.C.
Nelson Bolzenschweiss—Technik GmbH & Co. KG
Shaw Clifford C.
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