Method of drawing-in or flattening dents in sheet metal

Details Method of drawing-in or flattening dents in sheet metal Method of drawing-in or flattening dents in sheet metal

1974-03-27

1976-05-25

Grimley, Arthur T.

Electric heating

Metal heating

72705, 219119, 219128, H05B 300

Patent

active

039596192

ABSTRACT:
One side of a source of electrical energy is connected to a dented metal sheet and a hammer electrode connected to the other side of the source is successively brought into instantaneous contact with a multiplicity of locations spaced apart over the dent. The sheet is electrically heated at the location so that stresses in the sheet are relieved, thereby relaxing the sheet and flattening the dent. The electrode is generally L-shaped and has a pointed copper tip surrounded by a safety sleeve with only the point of the tip projecting from the sleeve.

REFERENCES:
patent: 2227476 (1941-01-01), Williams et al.
patent: 2272968 (1942-02-01), Dyer
patent: 2278487 (1942-04-01), Rakos
patent: 3415970 (1968-12-01), Cline
patent: 3801772 (1974-04-01), Curcio et al.
patent: 3854029 (1974-12-01), Fenollar

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