Method of preventing sag of panel and apparatus therefor

Details Method of preventing sag of panel and apparatus therefor Method of preventing sag of panel and apparatus therefor

1986-11-13

1988-05-17

Silverberg, Fred

Metal fusion bonding

Process

With condition responsive, program, or timing control

29447, B23K 3100

Patent

active

047445017

ABSTRACT:
A method and apparatus for preventing a sag of a panel, in which plate to be attached to a skeleton is located on the skeleton supported by a support means, both end parts of the plate are gripped by grasp electrodes of a resistance heating device, current is caused to flow through the plate by the grasp electrodes so as to preheat the plate to a predetermined temperature and to thermally expand it, the plate is welded to the skeleton by a welding machine, and a residual tensile stress is developed in the plate by the thermal shrinkage deformation attendant upon cooling of the plate after the welding. In the case where the plate has a cut-away part, electric conduction members for short-circuiting the cut-away part are interposed in this part so as to form electric conduction paths for the preheating of the plate.

REFERENCES:
patent: 1427753 (1922-08-01), Budd
patent: 1503639 (1924-08-01), Cunningham
patent: 3020867 (1962-02-01), Ballentini
patent: 3082519 (1963-03-01), Ballentini
patent: 3737978 (1973-06-01), Rathbun
patent: 3769675 (1973-11-01), Chaut
patent: 4404462 (1983-09-01), Murray

Affiliated with

Also associated with

Rating

Method of preventing sag of panel and apparatus therefor 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 preventing sag of panel and apparatus therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preventing sag of panel and apparatus therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1876594