Metal deforming – By use of tool acting during relative rotation between tool... – With metal deformation of different type
Patent
1977-03-07
1978-04-18
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
With metal deformation of different type
72 84, 72 86, B21H 106
Patent
active
040844196
ABSTRACT:
A method of manufacturing annular metal workpieces which have a deeply profiled cross-section, such as a blank flange, comprises heating the workpiece bloom or bar to a forging temperature and upsetting and piercing the workpiece to form a pierced blank. The pierced blank is then roughened by applying a force which acts at least on the outside and the inside periphery while the blank is rotated in order to form the blank into a ring which has a substantially rectangular cross-section and an inside diameter which is equal to or slightly larger than the inside diameter of the finished part. Thereupon, the ring is rotated and is shaped to the desired profile by directing a force on the front face of the rotating ring and finish-rolling it to the final internal and external diameters. The forces are exerted simultaneously on the peripheral surfaces and the front surfaces of the rotating ring. The material flow of the rotating ring is limited in the radial direction during this process. The rolling mill for carrying out the method includes first and second mill rolls which are mounted on respective axes for rotation with the axis of one of the rolls being inclined relative to the other by a small angle and with the rolls being movable toward and away from each other and with one of the rolls being formed with a negative of the face portion of the profile to be rolled, and the other formed with the negative of the other face portion of the profile being rolled which is designed on an obtuse-angled cone portion of the roll.
REFERENCES:
patent: 965036 (1910-07-01), Slick
patent: 1745514 (1930-02-01), Taylor
patent: 1965446 (1934-07-01), Bell
patent: 2058007 (1936-10-01), Edelmeier
patent: 3611771 (1971-10-01), Ulrych
patent: 3738139 (1973-06-01), Stuart et al.
Metals Handbook, 8th Ed., vol. 5, American Society for Metals, pp. 106 & 107, "Ring Rolling."
Dittrich Erich
Grone Siegfried
Larson Lowell A.
Thyssen Industrie AG
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