Electric heating – Metal heating – For bonding with pressure
Patent
1996-06-24
1998-10-27
Mills, Gregory L.
Electric heating
Metal heating
For bonding with pressure
2191171, 219157, B23K 1114
Patent
active
058280286
ABSTRACT:
An apparatus and method for resistance welding and then hot forging first and second workpieces together is disclosed. The first workpiece is provided with a deformable rivet. The second workpiece is provided with an aperture sized to receive the deformable rivet. The first and second workpieces are placed together with the deformable rivet of the first workpiece extending through the aperture in the second workpiece. A resistance heating power supply having a pair of power output terminals is provided. One of the terminals is connected in electrical communication with the first workpiece and the other one of the terminals is connected to a hot forging electrode. The hot forging electrode is movable relative to the deformable rivet. The hot forging electrode is affixed to an actuator. The actuator shifts the hot forging electrode into and out of engagement with the deformable rivet. A transducer provides an output indicative of the position of the hot forging electrode to determine rivet deformation. The controller cooperates with the transducer and the resistance heating power supply wherein the controller regulates the power output of the resistance heating power supply as a function of rivet deformation to ensure that the deformable rivet properly deforms.
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