US3651675A - Automatic gauge control of strip in rolling mill employing backup roll bending - Google Patents

Automatic gauge control of strip in rolling mill employing backup roll bending Download PDF

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Publication number
US3651675A
US3651675A US865331A US3651675DA US3651675A US 3651675 A US3651675 A US 3651675A US 865331 A US865331 A US 865331A US 3651675D A US3651675D A US 3651675DA US 3651675 A US3651675 A US 3651675A
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United States
Prior art keywords
roll
backup
strip
mill
change
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Expired - Lifetime
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US865331A
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English (en)
Inventor
Morris Denor Stone
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United Engineering and Foundry Co
United Engineering Inc
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United Engineering and Foundry Co
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Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP.OF OH
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP. OH.
Assigned to WEAN UNITED, INC. reassignment WEAN UNITED, INC. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). TO RELEASE SECURTIY DOCUMENT RECORDED AT REEL, FRAME 4792/307 RECORDED FEB. 26, 1987 Assignors: PITTSBURGH NATIONAL BANK
Assigned to UNITED ENGINEERING ROLLING MILLS, INC. reassignment UNITED ENGINEERING ROLLING MILLS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WEAN INCORPORATED
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Definitions

  • the disclosure of the present invention relates to the construction and operation of a rolling mill wherein automatic control of the gauge of the strip being rolled is achieved. More particularly, it relates to a rolling mill provided with mechanisms for bending either or both of the work rolls or backup rolls, including backup roll necks, and thereby control the longitudinal gauge of the material. it provides in the preferred form a four-high rolling mill including means for bending the backup rolls thereof so as to control the thickness of the material along its longitudinal axis.
  • a beam so arranged with respect to these two elements that the force of the backup crown control system is self-contained and not imposed upon the mill housing.
  • Use of the beam with respect to both backup rolls in this manner assures that the forces of the backup crown control mechanism, which would otherwise impose additional stretch on the housing, is nullified so that there is less need of continually adjusting the roll gap for automatic gauge control.
  • FIG. 1 is an elevational view, partly in section, of a four-high mill illustrating one embodiment of the present invention
  • FIG. 2 is an end elevational view of the mill shown in FIG. 1;
  • FIG. 3 is a diagrammatical view of the major components of the mill.
  • a fourhigh mill comprising two vertically arranged, spaced-apart housings I1 and 12, the housings having customary windows 13 and 14 into which is received a pair of work rolls 15 and 16, each work roll being backed up in turn by a backup roll 17 and 18, respectively.
  • the journals of each roll are received in bearing chocks, the work roll chocks being identified by the number 19 and the backup bearing chocks by the number 20.
  • the work rolls are urged away from each other and against their respective backup rolls by balance piston cylinder assemblies 21 mounted in the lower work roll chocks 19.
  • a horizontally arranged beam 23 which, for brevity, reference will be made to only one side of the mill.
  • the lower surface of the beam, in the vicinity of the chock 20, is provided with a rocker plate 24 which engages a similar rocker plate 25 formed on the top of the adjacent chock.
  • a raised portion which receives a breaker block 26, the top of the breaker block having a spherical surface which is engaged by a complementary surface formed at the bottom of the screw 27.
  • the screw 27 is received in a nut 28 formed in the housing 11, the screw being rotated by a worm and wheel not specifically shown on the drawings.
  • the center is connected to a rod 31, which extends in a vertical direction.
  • a piston 32 of a piston cylinder assembly 33 mounted on a separator 34 that connects the housings l1 and 12 together at the top of the mill.
  • the piston cylinder assembly 33 is employed to urge the chocks against the beam and the beam against the screws.
  • the beam at its lower end is provided with opposed downwardly extending hooks 35 which cooperate with projections 35a formed at the tops of the chocks 20, whereby in operation of the piston cylinder assembly 33 the hooks engage the chocks and bring them into contact with the bottom ofthe beam.
  • each side of the mill piston cylinder assemblies 36 which, as shown at the left of FIG. 1, receive two pistons 37a and 37b, one extending from the top of the cylinder and the other extending from the bottom.
  • the lower piston 37b engages a rocker plate 38 carried by the beam 23, the rocker plate being provided with a spherical surface which cooperates with a spherical surface formed at the end of the piston, thereby allowing for any relative movement between the two pieces.
  • the upper piston 37a as shown best in FIG. 2, is connected to a cross member 39, to the ends of which are connected identically pivotal links 40 which extend downward of the rolls on the outside of the windows 13.
  • a second bearing chock 41 which, as shown in FIG. 2, is provided with opposed projecting horizontal wings 42.
  • the lower ends of the links 40 are formed so as to engage the wings 42 of the bearing chock 41 whereby the bending force exerted by the cylinder 36 through the piston 37a is imposed upon the end of the roll 17 causing the center portion of the roll to bend in the direction of the work roll.
  • FIG. 1 shows that the beam carries the bearing chocks 20 of the lower backup roll 18.
  • the chock 20 is separated from the beam by a series of filler plates 46 which are replaceable so as to compensate for the various diameters of the rolls employed in the mill. This, of course, is quite customary in mill design.
  • FIG. 1 also shows as to one side of the mill the relationship between the beam 45 and the housing 11, wherein the beam rests upon the housing, there being rocker plates 48 provided so as to allow for relative movement between these two elements.
  • the cylinder in referring to one side of the mill, as in the case of the cylinders 36, is provided with two oppositely arranged pistons 51a and 51b, 51a being the upper piston which engages the lower surface of the beam 45 through a spherical bearing block 52 provided for allowing for relative movement between the beam and the piston 51a.
  • the piston 51b extends downwardly from the cylinder 49 and is connected to a cross member 53, to which are pivotally secured at its outer ends, elongated links 54 extending toward the work roll in such a way as to be clear of the window 13.
  • a second bearing chock 55 Outward of the main bearing chock 20 of the lower backup roll 18 is a second bearing chock 55, the chock of which, as shown in FIG. 2, has horizontal wings 56 engaged by links 54 and through which means the bending force of the piston cylinder assembly 49 is applied to the lower roll 18 in a way to bend the central portion of the roll 18 in a direction of the lower work rolls l6 pursuant to a longitudinal gauge control signal.
  • This arrangement as in the arrangement provided for the upper backup roll 17, provides a closed force circuit wherein the piston 51a imposes a force on the beam in one direction and the piston 51b imposes an equal, but opposite, force on the beam through the chock 20, whereby the bending forces are self-contained and are not imposed upon the housings 11 and 12.
  • M ,,,,,, mill spring constant, comprising housing stretch, screw compression, etc., as well as roll compression and flattening and backup roll inboard neck bending (No/in.) related to P.
  • m P/M mill stretch under rolling load P i.e., increase in roll gap
  • ZFIM decrease in roll gap due to forces F (two rolls).
  • Equations 1 and 2 are general equations for which it will now be observed that in using the reaction beams, as shown in FIG. 3, the forces F are self-contained between the backup rolls and their associated beams, i.e., as F changes, there is no change in housing stretch since the stretch in the housing is influenced only by the rolling load p.
  • Equations 1 and 2 are general equations for which it will now be observed that in using the reaction beams, as shown in FIG. 3, the forces F are self-contained between the backup rolls and their associated beams, i.e., as F changes, there is no change in housing stretch since the stretch in the housing is influenced only by the rolling load p.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US865331A 1968-10-21 1969-10-10 Automatic gauge control of strip in rolling mill employing backup roll bending Expired - Lifetime US3651675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4980568 1968-10-21

Publications (1)

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US3651675A true US3651675A (en) 1972-03-28

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US865331A Expired - Lifetime US3651675A (en) 1968-10-21 1969-10-10 Automatic gauge control of strip in rolling mill employing backup roll bending

Country Status (5)

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US (1) US3651675A (enrdf_load_stackoverflow)
CA (1) CA924139A (enrdf_load_stackoverflow)
DE (1) DE1950904A1 (enrdf_load_stackoverflow)
FR (1) FR2021129A1 (enrdf_load_stackoverflow)
GB (1) GB1289098A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762202A (en) * 1971-10-18 1973-10-02 W Sherwood Rolling mill for flat-rolled products
US11400498B2 (en) * 2016-10-11 2022-08-02 Sms Group Gmbh Cross-rolling mill
US20230076364A1 (en) * 2020-01-29 2023-03-09 Sms Group Gmbh Rolling device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808143A1 (de) * 1988-03-11 1989-09-21 Goebel Gmbh Maschf Einrichtung zum lagern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935091A (en) * 1932-07-22 1933-11-14 Mesta Machine Co Apparatus for balancing rolls
US3171305A (en) * 1961-05-03 1965-03-02 United Eng Foundry Co Rolling mill
US3212314A (en) * 1961-10-20 1965-10-19 United Eng Foundry Co Beam and plate rolling mill
US3373588A (en) * 1965-08-17 1968-03-19 United Eng Foundry Co Crown control for rolling mill
US3531960A (en) * 1966-12-15 1970-10-06 United Eng Foundry Co Gauge control method for rolling mills and like apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935091A (en) * 1932-07-22 1933-11-14 Mesta Machine Co Apparatus for balancing rolls
US3171305A (en) * 1961-05-03 1965-03-02 United Eng Foundry Co Rolling mill
US3212314A (en) * 1961-10-20 1965-10-19 United Eng Foundry Co Beam and plate rolling mill
US3373588A (en) * 1965-08-17 1968-03-19 United Eng Foundry Co Crown control for rolling mill
US3531960A (en) * 1966-12-15 1970-10-06 United Eng Foundry Co Gauge control method for rolling mills and like apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762202A (en) * 1971-10-18 1973-10-02 W Sherwood Rolling mill for flat-rolled products
US11400498B2 (en) * 2016-10-11 2022-08-02 Sms Group Gmbh Cross-rolling mill
US20230076364A1 (en) * 2020-01-29 2023-03-09 Sms Group Gmbh Rolling device
US11745234B2 (en) * 2020-01-29 2023-09-05 Sms Group Gmbh Rolling device

Also Published As

Publication number Publication date
CA924139A (en) 1973-04-10
GB1289098A (enrdf_load_stackoverflow) 1972-09-13
FR2021129A1 (enrdf_load_stackoverflow) 1970-07-17
DE1950904A1 (de) 1970-05-06

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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

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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

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Owner name: WEAN UNITED, INC.

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:004925/0218

Effective date: 19880509

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Owner name: UNITED ENGINEERING ROLLING MILLS, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WEAN INCORPORATED;REEL/FRAME:004920/0256

Effective date: 19880610