Device for producing a bead on the circumference of a hollow cyl

Details Device for producing a bead on the circumference of a hollow cyl Device for producing a bead on the circumference of a hollow cyl

1978-07-17

1979-12-04

Larson, Lowell A.

Metal deforming

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

During rotation of work

72105, 113120AA, B21D 1906

Patent

active

041765362

ABSTRACT:
A device for producing a bead on a circumference of a hollow cylinder seeks to minimize the risk of unwanted deformations of the hollow cylinder such as wrinkles or bulges which can result when an area of the hollow cylinder to be beaded is forced inward without support. In a preferred embodiment, the device of producing a bead on a hollow cylinder includes an internal tool and an external tool which can be adjusted in a controlled manner in the radial direction, the internal tool comprising a support mandrel and an inner ring which is adjacent to the supporting mandrel in the axial direction and is capable of being adjusted radially relative thereto, and the external tool includes an outer ring which surrounds the inner ring and a hold-down ring which is axially adjacent the outer ring and capable of being adjusted radially relative thereto. A preferred arrangement utilizes axially oriented springs whose forces are deflected radially inwards by tapered ring surfaces and assure proper relative movements of the several radially shiftable parts.

REFERENCES:
patent: 3967488 (1976-07-01), Hasselbeck et al.
patent: 4070888 (1978-01-01), Gombas

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