Bellows forming apparatus

Details Bellows forming apparatus Bellows forming apparatus

1975-01-30

1976-04-27

Lanham, C. W.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

72370, 72392, B21D 4102

Patent

active

039525759

ABSTRACT:
Apparatus for forming circumferential corrugations in a thin wall tube to produce a cylindrical bellows. The tube is supported on a rigid sleeve to prevent distortion, but is free to move axially as each corrugation is formed by an expanding mandrel which extends through a circumferential channel in the sleeve to form a complete ring. The mandrel is composed of interfitting wedge elements, alternate elements of which move radially more than the others to accommodate the expansion and contraction, a common multiple cam actuator providing the driving force on all elements simultaneously.

REFERENCES:
patent: 1825030 (1931-09-01), Vaughn
patent: 2089476 (1937-08-01), Grotnes
patent: 2435306 (1948-02-01), Grotnes

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