Method of rolling metal articles
OwnerVladimir N. Vydrininventor
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Abstract
The present invention relates to methods of rolling metal articles and can be used to advantage in rolling sheet steel. This method envisages the rotation of drive and driven work rolls in opposite directions at a higher and a lower peripheral speeds, respectively. The chosen ratio between the peripheral speeds of the work rolls is less than the elongation of the article so that thereby the specified unit tension applied to the article at the exit section thereof is provided for with reference to the ultimate strength of the metal emerging from the rolls. This is conducive to increasing the maximum elongation of the article and reducing the roll force by a considerable amount with the constriction of the article in breadth at the same time.
Claims9
A method of rolling metal articles comprising the following operations:
- imparting drive and driven rolls rotation in opposite directions at a higher and a lower peripheral speed, respectively;
- applying to an article disposed between said rolls a tension at the entry and exit sections thereof;
- inducing the article to move at a speed which at the exit section thereof is equal to the peripheral speed of said drive work roll, due consideration being given to the possible changes in the speed of this latter roll;
- maintaining a ratio between the peripheral speeds of said work rolls which is less than the elongation of the article so that thereby the specified unit tension applied to the article at the exit section thereof is provided for with reference to the ultimate strength of the metal emerging from the rolls.
A rolling process for a metal piece maintaining a peripheral velocity ratio between a pair of working rolls as high as possible but below a thickness ratio between the metal piece entering the working rolls and the same metal piece leaving the working rolls, whereby the rolling torque may be within a maximum tolerable torque.
A rolling process for a metal piece maintaining a peripheral velocity ratio between a pair of working rolls as high as possible but below a thickness ratio between the metal piece entering the working rolls and the same metal piece leaving the working rolls, whereby the rolling torque may be within a maximum tolerable torque, the magnitude of the torque on a drive roll of the working rolls rotating with the greater speed being the maximum possible under the conditions of the rolling process.
Dependencies are inferred from the claim text.