Electricity: motive power systems – Constant motor current – load and/or torque control
Patent
1983-09-08
1985-04-09
Dobeck, B.
Electricity: motive power systems
Constant motor current, load and/or torque control
318434, 318689, G05D 1700
Patent
active
045104247
ABSTRACT:
A nut runner control circuit which permits tightening of a screw in the plastic region with a normal torque without necessity of detecting the critical point from the elastic region to the plastic region. The ratio T.sub.0 /.theta..sub.2 of an increase T.sub.0 of torque from a value T.sub.1 to a value T.sub.2 during tightening to a corresponding rotational angle .theta..sub.2 (the rate of increase in the torque) and the torque T.sub.2 are stored in a peak memory circuit. After rotation of an angle .theta..sub.1 from the end point P.sub.0 of the rotational angle .theta..sub.2 the above-mentioned stored values are read out. The stored torque T.sub.2 is increased at the stored rate T.sub.0 /.theta..sub.2, so that at the intersection of the increased torque value to the actual tightening torque, the driving of the screw tightening tool is stopped.
REFERENCES:
patent: 3572447 (1971-03-01), Pauley et al.
patent: 3926264 (1975-12-01), Bardwell et al.
patent: 4056762 (1977-11-01), Schadlich
patent: 4210852 (1980-07-01), Gustavson
patent: 4322668 (1982-03-01), Trussler et al.
patent: 4463293 (1984-07-01), Hornung et al.
Adams Bruce L.
Burns Robert E.
Daiichi Dentsu Kabushiki Kaisha
Dobeck B.
Lobato Emmanuel J.
LandOfFree
Nut runner control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nut runner control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nut runner control circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1171927