US3729973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll passes for rolling a bar of continuously cast non-ferrous metal and the method improving the metal structure
Assignee: Siemens Industry Inc
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Filing: 1971-04-02
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Granted: 1973-05-01
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Expires: 1991-04-02
Abstract
Abstract A first pair of rolls preferably of unequal diameter and grooved in a manner to change the cross-sectional configuration of a bar of non-ferrous metal delivered from a continuous casting machine, from a generally trapezoidal section of substantial depth to a wider flattened less asymmetrical section, flat on both sides or flat on one side and concave on the other, and a second pair of rolls having concave grooves which will reduce the flattened bar delivered by the first pair of rolls to a generally symmetrical bar. The successive passes effectively carry out a method of operation which works the loose structure of the continuously cast bar into a more homogeneous fibrous structure.
Inventors
- 👤 R Wykes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:34
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/16; B21B1/18; B21B3/00; B21B3/003
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
190 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll having a first circular groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relatively deep sides, the other roll having a second circular groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the diameter of the said first and second grooves being such that the forward slip of the major surface of said bar with respect to said first groove is substantially equal to the forward slip of the minor surface of said bar with respect to said second groove.
Claim 2
Dependent Claim
190 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll having a first circular groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relatively deep sides, the other roll having a second circular groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the diameter of the said first and second grooves being such that the forward slip of the major surface of said bar with respect to said first groove is substantially equal to the forward slip of the minor surface of said bar with respect to said second groove.
Claim 3
Dependent Claim
96 words
The construction set forth in claim 1 and a second pair of rolls adjacent said first pair of rolls and whose axes are at right angles to the axes of said first rolls, both grooves in said second rolls being generally semi-circular whereby said bar produced by said first pair of rolls will be engaged in its long dimension and then reduced to a generally cylindrical bar and the parting between said second pair of rolls being small whereby the unsupported sides of said delivered section total not more than 25 percent of the bar circumference.
Claim 4
Dependent Claim
26 words
The construction set forth in claim 1, the diameter of the said first circular groove being greater than the diameter of the said second circular groove.
Claim 5
Dependent Claim
193 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll having a first groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relatively deep sides, the other roll having a second groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the spacing of the sides of the second groove being less than the spacing of the sides of the first groove but proportionally more with respect to the initial width of the minor surface than the spacing of the sides of the first groove is to the initial width of the major surface.
Claim 6
Dependent Claim
193 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll having a first groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relatively deep sides, the other roll having a second groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the spacing of the sides of the second groove being less than the spacing of the sides of the first groove but proportionally more with respect to the initial width of the minor surface than the spacing of the sides of the first groove is to the initial width of the major surface.
Claim 7
Dependent Claim
243 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll hAving a first circular groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relative deep sides, the other roll having a second circular groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the diameter of the said first and second grooves being such that the forward slip of the major surface of said bar with respect to said first groove is substantially equal to the forward slip of the minor surface of said bar with respect to said second groove, the spacing of the sides of the second groove being less than the spacing of the sides of the first groove but proportionally more with respect to the initial width of the minor surface than the spacing of the sides of the first groove is to the initial width of the major surface.
Claim 8
Dependent Claim
243 words
In a rolling mill, a pair of rolls for performing a rolling operation on a bar of continuously cast non-ferrous metal having a cross-section generally in the form of a trapezoid with major and minor parallel surfaces, one roll hAving a first circular groove which in cross-section substantially conforms to the major surface of said bar, said first groove including relative deep sides, the other roll having a second circular groove narrower than the said first groove and which in cross-section substantially conforms to the minor surface of said bar, said second groove also including relatively deep sides, the spacing of the sides of the said first and second grooves being such that in the rolling operation the displaced metal of said bar will spread laterally thereagainst and the bar delivered from the rolls will have substantially parallel major and minor surfaces, the diameter of the said first and second grooves being such that the forward slip of the major surface of said bar with respect to said first groove is substantially equal to the forward slip of the minor surface of said bar with respect to said second groove, the spacing of the sides of the second groove being less than the spacing of the sides of the first groove but proportionally more with respect to the initial width of the minor surface than the spacing of the sides of the first groove is to the initial width of the major surface.
Claim 9
Dependent Claim
13 words
The construction set forth in claim 4, said second groove being transversely convex.
Claim 10
Independent Claim
181 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls of unequal diameter and then through the operation of said rolls acting simultaneously on said major and minor surfaces over substantially their full widths from the time of initial engagement by the rolls, compressing and widening said bar to a new generally trapezoidal form in which the widened major and minor surfaces remain substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, the larger of said rolls acting on the said major surface over an area which is shorter and wider than the area being acted on by the smaller of said rolls, said larger roll producing less height reduction than said smaller roll and both rolls producing substantially equal forward slip of the respective surface.
Claim 11
Independent Claim
181 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls of unequal diameter and then through the operation of said rolls acting simultaneously on said major and minor surfaces over substantially their full widths from the time of initial engagement by the rolls, compressing and widening said bar to a new generally trapezoidal form in which the widened major and minor surfaces remain substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, the larger of said rolls acting on the said major surface over an area which is shorter and wider than the area being acted on by the smaller of said rolls, said larger roll producing less height reduction than said smaller roll and both rolls producing substantially equal forward slip of the respective surface.
Claim 12
Dependent Claim
20 words
The method set forth in claim 7, the minimum thickness dimension of the bar being along the longitudinal center line.
Claim 13
Dependent Claim
30 words
The method set forth in claim 7, the sides of said bar during said compressing step being restrained over a major portion of their reduced side dimensions from further widening.
Claim 14
Dependent Claim
24 words
The method set forth in claim 7, the percentage widening of the minor surface being greater than the percentage widening of the major surface.
Claim 15
Dependent Claim
76 words
The method set forth in claim 7 and delivering the bar in its new form to a second pair of rolls and then, through the action of the second pair of rolls, compressing the bar in the direction of its long cross-section dimension, and simultaneously applying lateral restraints of increasing resistance to widening of said bar as the long cross-section dimension is diminished whereby a substantially cylindrical bar is delivered from said second pair of rolls.
Claim 16
Dependent Claim
18 words
The method set forth in claim 7, said new form being less asymmetrical than said original cast bar.
Claim 17
Dependent Claim
39 words
The method set forth in claim 7, the initial compressing occurring along the center line of said bar and spreading immediately thereafter over the full width of said major and minor surfaces as the bar advances between said rolls.
Claim 18
Independent Claim
119 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces comprising compressing the bar on both sides according to opposed cylindrical patterns in which the length of the pressure arc against the wider majoR surface is less than the length of the pressure arc against the narrower minor surface whereby the decrease in thickness of said bar on the major surface side will be less than the decrease in thickness on the minor surface side and the forward slip of the major and minor surfaces will be substantially equal.
Claim 19
Independent Claim
119 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces comprising compressing the bar on both sides according to opposed cylindrical patterns in which the length of the pressure arc against the wider majoR surface is less than the length of the pressure arc against the narrower minor surface whereby the decrease in thickness of said bar on the major surface side will be less than the decrease in thickness on the minor surface side and the forward slip of the major and minor surfaces will be substantially equal.
Claim 20
Dependent Claim
34 words
The method set forth in claim 14 and in which the cylindrical pressure pattern against said minor surface side will be of less diameter than the cylindrical pressure pattern against said major surface side.
Claim 21
Dependent Claim
40 words
The method set forth in claim 14 and in which lateral spreading is limited and the extent of the lateral spreading of the major surface side is less than the extent of the lateral spreading of the minor surface side.
Claim 22
Independent Claim
125 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls and then through the operation of said rolls acting on said major and minor surfaces compressing and widening said bar to a new generally trapezoidal form in which the major and minor surfaces are substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, the percentage widening of the minor surface being greater than the percentage widening of the major surface.
Claim 23
Independent Claim
125 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls and then through the operation of said rolls acting on said major and minor surfaces compressing and widening said bar to a new generally trapezoidal form in which the major and minor surfaces are substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, the percentage widening of the minor surface being greater than the percentage widening of the major surface.
Claim 24
Independent Claim
119 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls and then through the operation of said rolls acting on said major and minor surfaces compressing and widening said bar to a new generally trapezoidal form in which the major and minor surfaces are substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, said new form being less asymmetrical than said original cast bar.
Claim 25
Independent Claim
119 words
The method of improving the grain structure in a bar of non-ferrous continuously cast metal in which the bar in cross-section is delivered from the casting process substantially in the form of a trapezoid having major and minor parallel surfaces, said method comprising the steps of delivering the bar to a pair of rolls and then through the operation of said rolls acting on said major and minor surfaces compressing and widening said bar to a new generally trapezoidal form in which the major and minor surfaces are substantially parallel and the cross-sectional area of said new form is less than the cross-sectional area of said original bar, said new form being less asymmetrical than said original cast bar.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |