Method and apparatus for producing a bent angle piece from a she

Details Method and apparatus for producing a bent angle piece from a she Method and apparatus for producing a bent angle piece from a she

1977-05-13

1978-10-03

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72 84, B21D 1904

Patent

active

041177045

ABSTRACT:
A method and apparatus for producing a bent angle piece from a sheet-metal. The sheet-metal is shaped into a cylinder 1 split along a generating line so that the ends of the sheet-metal can be overlapping, a portion of the said cylinder is clamped on a support such as a mandrel 3 moving in rotation about the axis of the said cylinder, and during the rotation of the said support, successive areas adjacent the unclamped portion 1b of the sheet-metal cylinder are bent progressively either outwardly or inwardly until said unclamped portion reaches a position which is at least nearly perpendicular to the axis 3a of the cylindrical portion so as to form an annular flange joined to the cylindrical flange constituted by the portion of cylindrical flange clamped on the support.

REFERENCES:
patent: 545791 (1895-09-01), Gates
patent: 1816357 (1931-07-01), Boye
patent: 2490880 (1949-12-01), Olson

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