Process and apparatus for upsetting pipe ends

Details Process and apparatus for upsetting pipe ends Process and apparatus for upsetting pipe ends

1978-08-15

1980-03-11

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72370, B21D 2200

Patent

active

041921674

ABSTRACT:
A process and apparatus for upsetting pipe ends, in particular drill rod pipe ends forming tool joints. The pipe end is held in a bottom die of a press and a shoulder mandrel is axially driven into the pipe end by a ram thereby simultaneously upsetting and filling the empty space between the die and the pipe end. The process includes at least two steps. In a first step the pipe end is upset on the outside into a cylindrical pipe section of larger diameter and a defined conical transition region while the internal diameter remains unchanged. In a second step the upset pipe section is swaged inwardly by means of a swaging tool mounted on the ram of the press.

REFERENCES:
patent: 1642696 (1927-07-01), Rateike
patent: 2748464 (1956-06-01), Kaul
patent: 3036366 (1962-05-01), Ricks
patent: 3124876 (1964-03-01), Putetti

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