Process for fabricating heavy wall to pipe

Details Process for fabricating heavy wall to pipe Process for fabricating heavy wall to pipe

1979-11-23

1981-10-13

Yost, Frank T.

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form longitudinally-seamed tube

72368, 72389, 72473, 72478, B21D 500

Patent

active

042940958

ABSTRACT:
Rolled steel plate is press-fabricated into cylindrical UO pipe with a large wall thickness, by the steps of crimping, U-ing and O-ing. In the U-ing process, a collapsible U-ing punch, including a center block carrying paired side punches on both sides and a bottom punch at the bottom, is used. The U-ing punch insures that the O-shaped workpiece has the desired butt gap by decreasing the ratio of its height to its width when the gap proves to be smaller than the desired butt edge gap, and vice versa when the gap proves to be larger than the desired butt edge gap.

REFERENCES:
patent: 737989 (1903-09-01), Wolfe
patent: 2825385 (1958-03-01), Allen
patent: 3466919 (1969-09-01), Bledstein
patent: 3802239 (1974-04-01), Karmann et al.
patent: 3844156 (1974-10-01), Hanni et al.

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