US3691809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill roll changing arrangement
Assignee: MESTA ENGINEERING COMPANY APARTNERSHIP OF PA
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Filing: 1971-02-03
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Granted: 1972-09-19
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Expires: 1991-02-03
Abstract
Abstract A quick-replaceable roll assembly for a rolling mill stand, said assembly comprising an inner carriage, rail engaging wheels rotatably mounted on said carriage, means for mounting a lower roll and a pair of bearing structures therefor on said carriage, said means comprising a number of balancing plungers reciprocatably mounted on said carriage and engaging said bearing structures, and means for mounting an upper roll and bearing structures therefor on said assembly in faced engagement with said lower roll.
Inventors
- 👤 Joseph L Hlafcsak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:37
CPC Classifications
B; B21; B21B; B21B13/00; B21B13/08; B21B13/10; B21B31/00; B21B31/08; B21B31/10; B21B13/001; B21B13/02; B21B2013/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A method for setting roll openings in a roll assembly for a mill stand, said assembly having upper and lower horizontal rolls and a pair of vertical rolls juxtaposed thereto, said method comprising the steps of aligning said vertical rolls with a roll assembly pass line, elevating one of said horizontal rolls to face on said pass line, elevating the other of said horizontal rolls to face against said one horizontal roll at said pass line to establish a zero roll position, and thereafter applying preloading forces to said roll assembly within said mill stand sufficient to induce substantially maximum deformations in said assembly and associated components and in said mill stand in order to establish a reference roll position.
Claim 2
Independent Claim
120 words
A method for setting roll openings in a roll assembly for a mill stand, said assembly having upper and lower horizontal rolls and a pair of vertical rolls juxtaposed thereto, said method comprising the steps of aligning said vertical rolls with a roll assembly pass line, elevating one of said horizontal rolls to face on said pass line, elevating the other of said horizontal rolls to face against said one horizontal roll at said pass line to establish a zero roll position, and thereafter applying preloading forces to said roll assembly within said mill stand sufficient to induce substantially maximum deformations in said assembly and associated components and in said mill stand in order to establish a reference roll position.
Claim 3
Dependent Claim
49 words
The method according to claim 1 including the additional steps of relieving said preloading forces and withdrawing said rolls from one another to establish roll gaps correspondingly less then predetermined rolling dimensions, and inserting a work piece among said rolls to expand said rolls precisely to said rolling dimensions.
Claim 4
Dependent Claim
19 words
The method according to claim 1 wherein said preloading forces are at least equal to maximum anticipated rolling forces.
Claim 5
Dependent Claim
26 words
The method according to claim 1 including the modified steps of performing said aligning and elevating steps prior to inserting said roll assembly into said mill.
Claim 6
Dependent Claim
32 words
The method according to claim 1 including the additional step of coinciding said roll assembly pass-line with a predetermined material pass-line of said mill stand prior to application of said preloading forces.
Claim 7
Dependent Claim
41 words
The method according to claim 1 wherein motive means are provided on said roll assembly for elevating said horizontal rolls and for aligning said vertical rolls, and said elevating and lining steps are accomplished by actuation of said motive means respectively.
Claim 8
Independent Claim
105 words
A method for setting roLl openings in a roll assembly for a mill stand, said assembly having a pair of lower horizontal rolls and a pair of vertical rolls juxtaposed thereto, said method comprising the steps performed on said roll assembly outside of said mill stand of aligning said vertical rolls with a roll assembly pass-line, elevating one of said horizontal rolls to face on said pass-line, elevating the other of said horizontal rolls to face against said one horizontal roll at said pass-line, and bringing each of said vertical rolls into engagement with both of said horizontal rolls to establish a zero roll position.
Claim 9
Independent Claim
105 words
A method for setting roLl openings in a roll assembly for a mill stand, said assembly having a pair of lower horizontal rolls and a pair of vertical rolls juxtaposed thereto, said method comprising the steps performed on said roll assembly outside of said mill stand of aligning said vertical rolls with a roll assembly pass-line, elevating one of said horizontal rolls to face on said pass-line, elevating the other of said horizontal rolls to face against said one horizontal roll at said pass-line, and bringing each of said vertical rolls into engagement with both of said horizontal rolls to establish a zero roll position.
Claim 10
Dependent Claim
36 words
The method according to claim 7 including the additional steps of inserting said roll assembly into said mill stand, and coinciding the pass-line of said roll assembly with a predetermined material pass-line of said mill stand.
Claim 11
Dependent Claim
25 words
The method according to claim 8 including the additional step of preloading said roll assembly within said mill stand to establish a reference roll position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |