Two stage impact beller

Details Two stage impact beller Two stage impact beller

1988-06-06

1989-07-04

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

Clamp structure constitutes sole initial metal-deforming...

72370, B21D 4102

Patent

active

048438600

ABSTRACT:
A two stage impact beller has a rod driven pinch bullet that pre expands an end of a heat exchanger tube, and a belling tool which follows the pinch bullet. This die is generally bell shaped with a flared out proximal end. A jaw assembly holds the tube during a belling process.

REFERENCES:
patent: 1791887 (1931-02-01), Davies et al.
patent: 2016795 (1935-10-01), Belknap
patent: 2620013 (1952-12-01), DeVoss
patent: 3119435 (1964-01-01), Greenman

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