Method and apparatus for hydraulically forming a tubular body

Details Method and apparatus for hydraulically forming a tubular body Method and apparatus for hydraulically forming a tubular body

1987-08-14

1988-12-06

Combs, E. Michael

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 62, B21D 2602, B21D 3908

Patent

active

047888431

ABSTRACT:
A method and apparatus for hydraulically forming metallic tubular bodies are disclosed. A forming die is provided, with the interior of the die configured to receive the tubular body to be shaped. The tubular body is filled with liquid, preferably water, with the interior of the tubular body then sealed. A forming plunger is thereafter inserted into the tubular body whereby localized hydraulic pressurization of the liquid within the body is effected. Outward deformation of the body toward the interior of the forming die thus results, with the formation of tapers, steps, projections, or other desired features readily achieved. The present invention is particularly suited for forming the tubular components of musical instruments.

REFERENCES:
patent: 1210629 (1917-01-01), Foster
patent: 3625040 (1971-12-01), DeGain

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