Rod rolling
AssigneeM.I.M. Rolling Consultants (H.K.) Limited
InventorRaymond Oliver Sayer
Life of this patent
Estimating the term…
Abstract
A method and apparatus for the reduction rolling of metal rod out of billets, ingots, continuously cast bar and like starting elements, in and by which the stock to be reduced is sent through a sequential series of roll-stands each having a pair of reduction rolls and an entry guide to direct the stock into the nip of the rolls. Some, most or all of the rolls are cylindrical, parallel and devoid of grooves; the stock is shaped by rolling so that upon arrival at and upon departure from each pair of grooveless rolls it has a cross-sectional profile having a major axis which is from one and one half to two and one half times longer than a minor axis at right angles to the major axis. The stock so shaped is presented to the grooveless rolls so that its minor axis is substantially parallel to the work surfaces of the rolls.
Claims2
A method of reduction of metal rod from stock initially of relative large transverse cross-sectional area, said method comprising:
- shaping said stock into a substantially rectangular transverse cross-sectional profile, the longer sides of which are from one and one-half to two and one-half times larger than the shorter sides;
- then
- guiding the stock into the space between a first pair of spaced parallel grooveless rolls with the shorter sides disposed substantially parallel to the work surfaces of the rolls and rollingly compressing the stock through the pair of rolls and with that pair of rolls only while not restraining lateral spreading thereof to reduce the length of the longer sides and increase the length of the shorter sides to the extent that the transverse cross-sectional area of the stock departing from said rolls is less than that of the stock approaching the rolls and the transverse cross-sectional profile of the stock departing from the rolls is substantially rectangular with the longer sides thereof substantially parallel to the work surfaces of the rolls and from one and one-half to two and one-half times longer than the shorter sides thereof substantially perpendicular to the work surface of the rolls;
- then
- guiding the stock into the space between a second pair of spaced parallel grooveless rolls with the last-mentioned shorter sides disposed parallel to the work surfaces of the second rolls and rollingly compressing the stock through the second pair of rolls and the with second pair of rolls only while not restraining lateral spreading thereof to reduce the length of the last-mentioned longer sides and increase the length of the last-mentioned shorter sides to the extent that the transverse cross-sectional area of the stock departing from said second pair of rolls is less than that of the stock approaching said second pair of rolls and the transverse cross-sectional profile of the stock departing from the second pair of rolls is substantially rectangular with the longer sides thereof substantially parallel to the work surfaces of the second pair of rolls and from one and one-half to two and one-half times longer than the shorter sides thereof substantially perpendicular to the work surfaces of the second pair of rolls.
A method of reduction rolling of metal rod from stock initially of relatively large transverse cross-sectional area, said method comprising:
- shaping said stock into a substantially rectangular transverse cross-sectional profile, the longer sides of which are substantially 2.1 times larger than the shorter sides;
- then
- guiding the stock into the space between a first pair of spaced parallel grooveless rolls with the shorter sides disposed substantially parallel to the work surfaces of the rolls and rollingly compressing the stock through the pair of rolls and with the pair of rolls only while not restraining lateral spreading thereof to reduce the length of the longer sides and increase the length of the shorter sides to the extent that the transverse cross-sectional area of the stock departing from said rolls is less than that of the stock approaching the rolls and the transverse cross-sectional profile of the stock departing from the rolls is substantially rectangular with the longer sides thereof substantially parallel to the work surfaces of the rolls and substantially 2.1 times longer than the shorter sides thereof substantially perpendicular to the work surfaces of the rolls;
- then
- guiding the stock into the space between a second pair of spaced parallel grooveless rolls with the last-mentioned shorter sides disposed parallel to the work surfaces of the second rolls and rollingly compressing the stock through the second pair of rolls and with the second pair of rolls only while not restraining lateral spreading thereof to reduce the length of the last-mentioned longer sides and increase the length of the last-mentioned shorter sides to the extent that the transverse cross-sectional area of the stock departing from said second pair of rolls is less than that of the stock approaching said second pair of rolls and the transverse cross-sectional profile of the stock departing from the second pair of rolls is substantially rectangular with the longer sides thereof substantially parallel to the work surfaces of the second pair of rolls and substantially 2.1 times longer than the shorter sides thereof substantially perpendicular to the work surfaces of the second pair of rolls.
Dependencies are inferred from the claim text.