Process and tool for producing a barrel for a telescopic univers

Details Process and tool for producing a barrel for a telescopic univers Process and tool for producing a barrel for a telescopic univers

1991-12-19

1992-11-03

Larson, Lowell A.

Metal deforming

Process

Tube making or reshaping

72401, 72402, B21K 2116

Patent

active

051601087

ABSTRACT:
A barrel to be formed has internal tracks of circular profile which abut ridges (4). The process starts with a sheet-metal blank which is arranged around an inner shaping mandrel equipped with protuberances integral or rotatably attached and defining shaping surfaces for the tracks. Three dies are displaced radially and have a projection which initiates a fold and which than forces this fold between the protuberances in order to produce the ridge as a result of a flow of material towards this region, which will undergo a very high load during operation.

REFERENCES:
patent: 4381659 (1983-05-01), Welch et al.
patent: 4453395 (1984-06-01), Takeda et al.

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