Method and apparatus for lubricating the mandrel upon the manufa

Details Method and apparatus for lubricating the mandrel upon the manufa Method and apparatus for lubricating the mandrel upon the manufa

1989-12-12

1990-10-30

Larson, Lowell A.

Metal deforming

With cleaning, descaling, or lubrication of work or product

Lubricating

72208, 72214, B21B 4502

Patent

active

049660225

ABSTRACT:
A method and apparatus for manufacturing seamless metal tubes by the cold pilger process permitting the continuous feeding of fresh cooling and lubricating agent between the mandrel and inner surface of the material being rolled. The apparatus includes a roll stand including tapering calibrated rolls (2) which is reciprocatingly movable in the direction of rolling at a predetermined stroke to define a reduction zone, the rolls (2) rolling with alternating direction of rotation over the material (3) being rolled and a tapering mandrel (1) inside the material for reducing the diameter and wall thickness of the material, wherein at least one of the rolls (2) and the mandrel (1) has a surface discontinuity within the reduction zone for creating a zone of interruption (6) or an annular gap within which no contact occurs between the material to be rolled (3) and the mandrel (1).

REFERENCES:
patent: 3783663 (1974-01-01), Prajsner et al.
patent: 4658617 (1987-04-01), Peytavin

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