Method for manufacturing a box-shaped door

Details Method for manufacturing a box-shaped door Method for manufacturing a box-shaped door

1982-09-21

1984-11-27

Godici, Nicholas P.

Metal fusion bonding

Process

With shaping

228173C, 72421, B23K 3102

Patent

active

044847033

ABSTRACT:
A method for manufacturing a box-shaped door, which comprises the steps of cutting off the four corners of a rectangular metal blank in the square form to provide the four walls of a box body; vertically bending said cutoff four sides by a female die on whose inner wall there are provided in the stepped state an upper bending section and lower shaping section and a male die whose outer wall is shaped complementary to the inner wall of said female die; curvedly shaping the abutting edges of the corners of the four sides of the metal blank, said vertical bending and curved shaping being carried out at the same time; and welding said abutting edges to provide the box body of a box-shaped door.

REFERENCES:
patent: 163793 (1875-05-01), Martyn
patent: 858172 (1907-06-01), Godfrey
patent: 1272751 (1918-07-01), Winter
patent: 3440711 (1969-04-01), Roper

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