Stretch reducing of hollow stock

Details Stretch reducing of hollow stock Stretch reducing of hollow stock

1976-06-21

1978-07-11

Mehr, Milton S.

Metal deforming

By use of roller or roller-like tool-element

Plural roller-couples

B21B 1714

Patent

active

040994023

ABSTRACT:
A multistand, continuous stretch reducing mill is designed so that for the major reduction passes the largest to smallest diameter ratio changes by less than 0.4% from pass to pass and the squeeze length differential remains below 1.15 times the square root of the average logarithmic reduction (in millimeters) of the outer diameter of each pass. This way, polygonal inner contour and cracks in the pipe adjacent a roll gap is avoided.

REFERENCES:
patent: 2041937 (1936-05-01), Korbuly
patent: 3754425 (1973-08-01), Bindernagel et al.

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