Pierced metal tube blanks and methods of making such blanks

Details Pierced metal tube blanks and methods of making such blanks Pierced metal tube blanks and methods of making such blanks

1978-11-03

1981-04-21

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72267, 72256, 72208, B21B 1708, B21C 2318, B21D 2226

Patent

active

042625165

ABSTRACT:
A pierced metal blank having an annular cross-section with one end closed and the other end open for use in the manufacture of seamless tubes has a bore with portions of different diameters, the portion of larger diameter, which is adjacent the open end of the blank has a wall thickness which is less than that of the portion of smaller diameter which is adjacent the closed end of the blank. Preferably there is a conical transition between the two portions of different diameters. The blank is preferably made from a metal billet of square cross-section in a substantially cylindrical piercing mould by piercing the billet within the mould by means of a stepped mandrel which presses the material of the square billet outwards into contact with the cylindrical wall of the mould.

REFERENCES:
patent: 495245 (1893-04-01), Ehrhardt
patent: 520296 (1894-05-01), Cayley
patent: 796223 (1905-08-01), Kaub
patent: 1171344 (1916-02-01), Legere
patent: 1314366 (1919-08-01), Reigart
patent: 1347415 (1920-07-01), Sherman et al.
patent: 2248002 (1941-07-01), Layton
patent: 2299105 (1942-10-01), Muir
patent: 2339019 (1944-01-01), Le Tourneau
patent: 2642647 (1953-06-01), Culhane, Jr.
patent: 2739372 (1956-03-01), Kritscher
patent: 2917823 (1959-12-01), Fletcher

Affiliated with

Also associated with

Rating

Pierced metal tube blanks and methods of making such blanks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pierced metal tube blanks and methods of making such blanks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pierced metal tube blanks and methods of making such blanks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-551915