US3657913A - Crown control - Google Patents
Crown control Download PDFInfo
- Publication number
- US3657913A US3657913A US854055A US3657913DA US3657913A US 3657913 A US3657913 A US 3657913A US 854055 A US854055 A US 854055A US 3657913D A US3657913D A US 3657913DA US 3657913 A US3657913 A US 3657913A
- Authority
- US
- United States
- Prior art keywords
- assemblies
- backup roll
- roll assemblies
- rolling
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
- B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/025—Quarto, four-high stands
Definitions
- This disclosure provides a crown control apparatus for con- I trolling the contour of the roll opening, formed by the working [30] Foreign Application Priority Data rolls of a rolling mill.
- the upper roll is ultimately supported by one or more roller assemblies consisting of a plurality of axi- Sept' 1968 Great i i "46238/68 ally aligned short-faced rollers. These rollers are rotatably supported on a shaft carried by a separator beam located CL 72/242172/237 between the mill housings.
- the beam includes two opposed 1 s /0 32113 9/ projecting arms between which a threaded screw applies a [58] Field of Search ..72/24l, 242, 2 force to deflect the beam relative to the pass line of the mill. 72/240, 237 This deflection produces a crown on the roller assemblies that r is transmitted ultimately to the working rolls.
- This invention relates to a rolling mill provided with roll deflecting means for controlling the crown of the rolling mill rolls.
- crown control devices which flex the rolls to counteract for the inherentdeflection caused by the rolling loads.
- Such devices have been very successfully employed for the backup rolls of four-high mills and includehydrauliccylinders arranged in either of two separate forms. The cylinders were either mounted between the journals of the backup rolls,
- reactionforce absorbing means in the form of beams or additional cylinders I have been included in the mill to relieve the mill housings and screws from the roll bending reaction force.
- the backup rolls are necessarily constructed with extended journals on which are mounted outboard bearing chocks for the roll bending device.
- This construction along with the hydraulic roll bending cylinders and associated pumps, controls, etc., does represent an additional capital expense that may not be fully' justified in certainrolliug mill installations or embodiments.
- h In one form of the present invention there is provided in combination with a cluster-type rolling mill, four-high or sixhigh rolling mills or the like, at least one beam positioned in a rolling force transmitting relation between the mill housing and the ultimate support rollers for the working rolls of the mill and force generating means secured to the beam for imposing a self-contained bending moment on the beam for deflecting the support rollers to control the crown of at least one working roll at the work roll bite.
- FIG. 1 is an elevational view, partly in section, illustrating a cluster-type rolling mill incorporating the features of the present invention
- FIG. 2 is a sectional view taken along lines II-II of FIG. 1,
- FIG. 3 is a plane view of the rolling mill illustrated in FIG. 1,
- FIG. 4 is a sectional view taken along lines IV--IV. of FIG. 1
- the rolling mill essentially comprises a pair of spaced-apart housings 11 and 12 which are octagonally shaped and provided with circular windows 13 and 14 which are enclosed by covers 13a and 14a during operation of the mill. Supported by the housings within these windows are a total of 20 rolling mill rolls which i are divided into an upper set of rolls and a lower set of l0 rolls.
- the lower set of rolls With respect to the lower set of rolls, they comprise a small diameter work roll 15 supported in a nested relation by backing rolls l6 and 17 that are, in turn, supported by three driven backing rolls l8, l9 and 21,.
- Completing the lower set of rolls are four relatively large diameter backup rolls 22, 23, 24, and 25 which have bearing chocks mounted on their ends and supported in the windows 13 and 14.
- the rolls 23 and 24 have eccentric members 26 and 27 associated with their chocks and form part of an apparatus for rapidly adjusting these rolls, hence, the work roll 15, relative to a material pass line through the mill.
- Engaging the members 26 and 27 are push-pull bars 28 that have gear teeth in mesh with idle gears 29.
- Adjustment means 37 and 38 are provided for positioning the backup rolls 22 and 25, respectively, relative to the pass line'of the mill and, since these means are similar to other means for adjusting correspondingly located upper support rolls, they will not be described in greater detail.
- each of the roller assemblies 47 and is supported by a housing cross beam 53 secured between the housings by a threaded stud 11a and nuts 11b.
- FIG. 53 Sis an elevational view, partly in section, of a second embodiment illustrating a four-high rolling mill incorporating the features of the present invention
- FIG. 6 is a sectional view taken along lines VI-Vl of FIG. 5.
- FIGS. 1, 2, 3 and 4 there is illustrated one embodiment of the present invention in the form of a threadably received at one end in a nut 58 that is bolted to the housings.
- Gear teeth 59 formed on the other end of the spindle 57 mesh with a gear 61 secured to each end of the associated roller assembly.
- Rotation of the spindle 57 by a winch or other suitable means attached at end 57a causes the shaft 52 to rotate about its eccentrically mounted portion in the cross beams 53 to produce simultaneous displacement of all the rollers 51 relative to the mill pass line.
- lock nuts 62 prevent further rotation of the spindle 57.
- crown control feature of the present invention which is best illustrated in FIGS. 2 and 3.
- the illustrated crown control feature has been incorporated with the roller assemblies 48 and 49, although, as will be apparent to those skilled in the art, it may be incorporated with any one or more of the roller assemblies 47 and 50, as well as the backup rolls 22 23, 24 and 25.
- the illustrated crown control apparatus comprises for each roller assembly 48 and 49 a separator beam 63 secured to the housings 11 and 12 by wedges 64. Extending downwardly from the beam are a plurality of projections 65 that engage eccentric portions 52a formed on the shaft 52 at its ends and between the rollers 51.
- the separator 63 is formed with two opposed arms 66 and 67 that project upward between the housings. Enlarged circular castings 68 and 69 are made part of the projecting ends of the arms 66 and 67, respectively. Opposite hand threads formed in each casting 68 and 69 are engaged by similar threads formed on a shaft 71 that extends beyond the housing 11 and is rotatably mounted thereto by a bearing block 72, but held against axial movement.
- the extended end of the shaft 71 is splined at 73 for receiving a winch or other suitable drive means for rotating the shaft and causing the casting to be drawn towards or away from each other.
- the effect of the bowing of the cross beam is transmitted to the shafts 52 of the roller assemblies 48 and 49 producing a similar bowing of these roller assemblies which bowing now has the characteristics of a crown on a roll.
- the crown effect is transmitted through the intermediate backing rolls to the work roll and, thereby, effectively controls the shape of the opening between the two work rolls.
- a locking pin 71a is moved into engagement with a gear wheel 71b secured on the shaft 71 to prevent further rotation of the shaft.
- each adjusting means 74 carried in each housing for positioning the roller assemblies 48 and 49 relative to the pass line of the mill.
- Each adjusting means 74 comprises a spindle 75 provided at one end with gear teeth 76 that mesh with gear segments 77 and 78 secured to the shafts 52 of the roller assemblies 48 and 49.
- Formed to the other end of the spindle 75 is a worm gear unit 79 driven by a motor 80, shown in FIG. 3. Rotation of the spindle 75 by. the motor 80 causes rotation of the eccentric portions 52a of the shaft for the roller assemblies 48 and 49, thus displacing these roller assemblies relative to the pass line of the mill and, in effect, changing the distance between the work rolls.
- FIGS. and 6 there is provided a pair of spaced-apart housings 81 and 82, each having a window 83 into which there is received a pair of work rolls 84 and 85 supported in bearing chock assemblies 84a and 85a, respectively.
- a lower backup roll 86 has a bearing chock assembly 86a that rotatably supports the backup roll in the housing.
- the upper work roll 84 is supported by a backup roll assembly 87 constructed in accordance with the teachings of the present invention.
- the backup roll assembly 87 consists of a plurality of spaced-apart rollers 88 rotatably mounted by bearings on a shaft 89.
- a plurality of support members 90 are arranged along the length of the shaft 89 intermediate the rollers 88 and at each end thereof.
- the top portionof each support member is constructed in the shape ofa T and adapted to be slidably received in a similarly shaped slot formed in a support beam 91.
- the beam 91 is supported in the housings by a conventional rolling mill screwdown apparatus, which includes screws 92 threadably received in nuts 93 supported against rotation in the housings.
- a conventional rolling mill screwdown apparatus which includes screws 92 threadably received in nuts 93 supported against rotation in the housings.
- the beam 91 it is formed with two opposed arms 91a and 91b which project upwardly between the housings. Formed on the ends of these arms 91a and 91b are circular castings 94 and 95.
- These castings have internal threads that mesh with threads formed on a common shaft 96 which is held against axial movement. Secured to this shaft between the circular castings is a gear wheel 97 that meshes with a worm gear 98 driven by a motor 99.
- the motor 99 is actuated to rotate the shaft 96 and draw the circular castings 94 and 95 towards or away from each other, thereby imposing a bending moment on the beam 91. This results in a bowing of the beam relative to the pass line of the mill. Since the beam supports the backup roll assembly 87, the rollers thereof assume a position which now takes the form of a crown on a roll. Since the roll assembly 87 supports the work roll 84, the crowned shape of the assembly is transmitted to the work roll.
- the present invention may be embodied in other rolling mill arrangements, such as a five-high or six-high arrangement of rolls.
- one or both of the ultimate supporting roller assemblies will take the form of the roll assembly 87 illustrated in the second embodiment or the roller assembly 48 or 49 illustrated in the first embodiment.
- a multi-high rolling mill having a housing for receiving a pair of work roll assemblies and at least one backup roll assembly for supporting one of the work roll assemblies and arranged to receive at least a portion of the rolling force to which the supported work roll assembly is subject,
- a force generating means also connected to said beam for deflecting said beam in a direction to deflect the backup roll assembly to control the crown of said one work roll assembly.
- a backup roll assembly received in said window for supporting at least one of said work roll assemblies and arranged to receive at least a portion of a rolling force to which the supported work roll assembly is subject
- a force generating means also connected to said beam for deflecting said beam in a manner to deflect said backup roll assembly to control the crown of said one work roll assembly
- said backup roll assemblies for said other work roll assembly each having a plurality of casters
- said innermost caster backup roll assemblies each carrying a deflectable beam
- said two backup roll assemblies that carry said deflectable beams include a plurality of casters arranged to extend along the body of said intermediate roll assemblies,
- said deflectable beams comprising means for rotatably supporting said casters and including means for connecting a frame for rotatably supporting said casters and constructed to receive a portion of the rolling loads of the mill,
- said beam having means for carrying said frame in a manner that the frame transfers a portion of the rolling load to the beam
- said force generating means including a shaft having opposite hand threads received by said portion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB46238/68A GB1279247A (en) | 1968-09-30 | 1968-09-30 | Crown control in a rolling mill or calender |
Publications (1)
Publication Number | Publication Date |
---|---|
US3657913A true US3657913A (en) | 1972-04-25 |
Family
ID=10440416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US854055A Expired - Lifetime US3657913A (en) | 1968-09-30 | 1969-08-29 | Crown control |
Country Status (3)
Country | Link |
---|---|
US (1) | US3657913A (en) |
FR (1) | FR2019169A1 (en) |
GB (1) | GB1279247A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857268A (en) * | 1971-12-10 | 1974-12-31 | Hitachi Ltd | Rolling mill and rolling method |
US5193377A (en) * | 1991-08-23 | 1993-03-16 | T. Sendzimir, Inc. | Crown adjustment systems on cluster mills |
WO1993005898A1 (en) * | 1991-09-23 | 1993-04-01 | Sundwiger Eisenhütte Maschinenfabrik Gmbh & Co. | Roll supporting device to correct the roll gap in a cluster mill for strips |
WO2001094042A1 (en) * | 2000-06-06 | 2001-12-13 | Sundwig Gmbh | Multiple-roll rolling mill for strip material |
WO2002060610A1 (en) * | 2001-01-30 | 2002-08-08 | Pohang Iron & Steel Co., Ltd. | Crown preventing backup roll assembly for rolling mills |
ITUD20090010A1 (en) * | 2009-01-15 | 2010-07-16 | Danieli Off Mecc | SUPPORTING ROLLER FOR A LAMINATION CAGE, DEVICE AND COMPENSATION PROCEDURE FOR A USING ROLLER AS A SUPPORTING ROLLER, AND ITS LAMINATION CAGE |
US20140331730A1 (en) * | 2011-11-19 | 2014-11-13 | Jilin University | Rolling device and the method thereof |
US20150143864A1 (en) * | 2010-01-29 | 2015-05-28 | Jp Steel Plantech Co. | Roller leveler |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2132122B (en) * | 1982-12-16 | 1986-05-29 | Sumitomo Metal Ind | Rolling mill |
DE3736683C3 (en) * | 1987-10-29 | 2003-09-11 | Froehling Josef Gmbh | Multi-roll rolling mill |
JP3034928B2 (en) * | 1990-09-19 | 2000-04-17 | 株式会社日立製作所 | Multi-high rolling mill, cluster-type rolling mill, sendzimer-type multi-high rolling mill, and method of controlling multi-high rolling mill |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3147648A (en) * | 1962-06-26 | 1964-09-08 | Sendzimir Inc T | Strip mill with roll cartridge |
US3355924A (en) * | 1963-07-10 | 1967-12-05 | Sendzimir Inc T | Control of deflection in rolling mills and the like |
US3429166A (en) * | 1965-03-09 | 1969-02-25 | Aluminium Lab Ltd | Rolling mill |
US3546914A (en) * | 1966-06-28 | 1970-12-15 | Schloemann Ag | Multi-roll stands |
-
1968
- 1968-09-30 GB GB46238/68A patent/GB1279247A/en not_active Expired
-
1969
- 1969-08-29 US US854055A patent/US3657913A/en not_active Expired - Lifetime
- 1969-09-25 FR FR6932691A patent/FR2019169A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3147648A (en) * | 1962-06-26 | 1964-09-08 | Sendzimir Inc T | Strip mill with roll cartridge |
US3355924A (en) * | 1963-07-10 | 1967-12-05 | Sendzimir Inc T | Control of deflection in rolling mills and the like |
US3429166A (en) * | 1965-03-09 | 1969-02-25 | Aluminium Lab Ltd | Rolling mill |
US3546914A (en) * | 1966-06-28 | 1970-12-15 | Schloemann Ag | Multi-roll stands |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857268A (en) * | 1971-12-10 | 1974-12-31 | Hitachi Ltd | Rolling mill and rolling method |
US5193377A (en) * | 1991-08-23 | 1993-03-16 | T. Sendzimir, Inc. | Crown adjustment systems on cluster mills |
WO1993005898A1 (en) * | 1991-09-23 | 1993-04-01 | Sundwiger Eisenhütte Maschinenfabrik Gmbh & Co. | Roll supporting device to correct the roll gap in a cluster mill for strips |
WO2001094042A1 (en) * | 2000-06-06 | 2001-12-13 | Sundwig Gmbh | Multiple-roll rolling mill for strip material |
WO2002060610A1 (en) * | 2001-01-30 | 2002-08-08 | Pohang Iron & Steel Co., Ltd. | Crown preventing backup roll assembly for rolling mills |
ITUD20090010A1 (en) * | 2009-01-15 | 2010-07-16 | Danieli Off Mecc | SUPPORTING ROLLER FOR A LAMINATION CAGE, DEVICE AND COMPENSATION PROCEDURE FOR A USING ROLLER AS A SUPPORTING ROLLER, AND ITS LAMINATION CAGE |
US20150143864A1 (en) * | 2010-01-29 | 2015-05-28 | Jp Steel Plantech Co. | Roller leveler |
US9248486B2 (en) * | 2010-01-29 | 2016-02-02 | Jp Steel Plantech Co. | Roller leveler |
US20140331730A1 (en) * | 2011-11-19 | 2014-11-13 | Jilin University | Rolling device and the method thereof |
Also Published As
Publication number | Publication date |
---|---|
GB1279247A (en) | 1972-06-28 |
FR2019169A1 (en) | 1970-06-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765 Effective date: 19850610 |
|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK,PENNSYLVANIA Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 |
|
AS | Assignment |
Owner name: WEAN UNITED, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:004925/0218 Effective date: 19880509 |
|
AS | Assignment |
Owner name: UNITED ENGINEERING ROLLING MILLS, INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WEAN INCORPORATED;REEL/FRAME:004920/0256 Effective date: 19880610 |