US3753461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bending-roll unit for continuous-casting machine
Assignee: United States Steel Corp
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Filing: 1971-12-16
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Granted: 1973-08-21
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Expires: 1991-12-16
Abstract
Abstract A bending-roll unit for continuous-casting machines, where the unit directly follows a guide-roll rack and precedes a curved roll rack. The unit embodies a combination of driven rolls and idlers arranged in opposed pairs. One of the driven rolls is a fulcrum roll which defines the tangent line where a casting first acquires a curvature. Other driven rolls above and below the fulcrum roll sustain the reaction forces. These driven rolls also supply the initial tractive force which propels the casting and thus eliminate the need for separate driven pinch rolls usually located above the bending rolls. Floating idlers confine the casting against bulging. The unit may be used with either a flexible starter bar or slightly modified with a rigid bar.
Inventors
- 👤 F Gallucci
- 👤 G Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:58
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/12; B22D11/128; B22D11/1282
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
A bending roll unit for a continuous-casting machine, said unit comprising a frame, a plurality of opposed pairs of rolls, means journaling said rolls in said frame, said rolls including: a driven fulcrum roll and an opposed idler, said fulcrum roll being shiftable and defining a tangent line where a casting first acquires a curvature, said idler being journaled on a fixed axis; a driven reaction roll and an opposed idler above said firstnamed idler and said fulcrum roll respectively, said reaction roll being shiftable and said second-named idler being journaled on a fixed axis; a driven reaction roll and an opposed idler below said firstnamed idler and said fulcrum roll respectively, said secondnamed reaction roll being shiftable and said third-named idler being journaled on a fixed axis; and idlers journaled on fixed axis above said second-named pair and below said third-named pair; the rolls above said tangent line defining a straight path for a casting and those below said tangent line Defining a curved path.
Claim 2
Dependent Claim
166 words
A bending roll unit for a continuous-casting machine, said unit comprising a frame, a plurality of opposed pairs of rolls, means journaling said rolls in said frame, said rolls including: a driven fulcrum roll and an opposed idler, said fulcrum roll being shiftable and defining a tangent line where a casting first acquires a curvature, said idler being journaled on a fixed axis; a driven reaction roll and an opposed idler above said firstnamed idler and said fulcrum roll respectively, said reaction roll being shiftable and said second-named idler being journaled on a fixed axis; a driven reaction roll and an opposed idler below said firstnamed idler and said fulcrum roll respectively, said secondnamed reaction roll being shiftable and said third-named idler being journaled on a fixed axis; and idlers journaled on fixed axis above said second-named pair and below said third-named pair; the rolls above said tangent line defining a straight path for a casting and those below said tangent line Defining a curved path.
Claim 3
Dependent Claim
41 words
A bending roll unit as defined in claim 1 comprising in addition an opposed pair of floating idlers intermediate said first and second-named pairs of rolls and an opposed pair of floating idlers intermediate said first and third-named pairs of rolls.
Claim 4
Dependent Claim
20 words
A unit as defined in claim 2 in which said frame is fixed for use with a flexible starter bar.
Claim 5
Dependent Claim
44 words
A unit as defined in claim 2 in which said frame includes a switch section below said last-named floating idlers, said second-named driven reaction roll and one of said last-named idlers being journaled in said switch section for use with a rigid starter bar.
Claim 6
Dependent Claim
28 words
A bending roll unit as defined in claim 1 comprising in addition yieldable means carried by said frame urging said shiftable driven rolls toward their respective opposed idlers.
Claim 7
Dependent Claim
117 words
In a continuous-casting machine which includes a straight guide roll rack, a starter bar, a bending-roll unit directly following said rack therebelow, and a curved roll rack below said bending roll unit, the improvement in which said bending roll unit comprises a driven fulcrum roll defining a tangent line above which a casting is straight and below which a casting has a curvature, driven reaction rolls above and below said fulcrum roll at the convex side of the casting, and idlers opposed to said fulcrum and reaction rolls for engaging the opposite face of the casting, said driven rolls serving not only to bend the casting but also applying the initial tractive force for propelling the casting.
Claim 8
Dependent Claim
117 words
In a continuous-casting machine which includes a straight guide roll rack, a starter bar, a bending-roll unit directly following said rack therebelow, and a curved roll rack below said bending roll unit, the improvement in which said bending roll unit comprises a driven fulcrum roll defining a tangent line above which a casting is straight and below which a casting has a curvature, driven reaction rolls above and below said fulcrum roll at the convex side of the casting, and idlers opposed to said fulcrum and reaction rolls for engaging the opposite face of the casting, said driven rolls serving not only to bend the casting but also applying the initial tractive force for propelling the casting.
Claim 9
Dependent Claim
26 words
A bending roll unit as defined in claim 6 in which said fulcrum and reaction rolls are shiftable and said idlers are journaled on fixed axes.
Claim 10
Dependent Claim
44 words
A bending roll unit as defined in claim 6 including in addition an opposed pair of floating idlers immediately above said fulcrum roll and its opposed idler, and a second opposed pair of floating idlers immediately below said fulcrum roll and its opposed idler.
Claim 11
Dependent Claim
30 words
A bending roll unit as defined in claim 6 including in addition opposed pairs of idlers journaled on fixed axes above and below said reaction rolls and their opposed idlers.
Claim 12
Dependent Claim
23 words
In a continuous-casting machine as defined in claim 6, said starter bar being flexible, and said rolls being journaled in a fixed frame.
Claim 13
Dependent Claim
37 words
In a continuous casting machine as defined in claim 6, said starter bar being rigid, and rolls at the convex side of the casting below said fulcrum roll being journaled in a switch section of the frame.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |