WO2024023863A1 - Device for balancing the axial forces generated during rolling operations - Google Patents

Device for balancing the axial forces generated during rolling operations Download PDF

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Publication number
WO2024023863A1
WO2024023863A1 PCT/IT2023/050176 IT2023050176W WO2024023863A1 WO 2024023863 A1 WO2024023863 A1 WO 2024023863A1 IT 2023050176 W IT2023050176 W IT 2023050176W WO 2024023863 A1 WO2024023863 A1 WO 2024023863A1
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WO
WIPO (PCT)
Prior art keywords
rolling stand
rolling
chocks
container
axial forces
Prior art date
Application number
PCT/IT2023/050176
Other languages
French (fr)
Inventor
Mirko ZANOTTI
Giuseppe Alberti
Original Assignee
Deltasteel S.R.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deltasteel S.R.L. filed Critical Deltasteel S.R.L.
Publication of WO2024023863A1 publication Critical patent/WO2024023863A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/30—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • F16C39/02—Relieving load on bearings using mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/07—Adaptation of roll neck bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

Definitions

  • the present invention refers to a device for contrasting the axial forces generated in a rolling process .
  • the present invention refers to a rolling stand of the tie-rod type .
  • the rolling cylinders therefore generate opposing axial forces which, passing through the radial bearings , are discharged onto the axial thrust bearings and, from here , through suitable members , onto the chocks of the machine . From these , they are discharged onto a container which acts as a support for a rolling stand .
  • US-A-3 851 934 discloses a conventional rolling stand, and not a tie-rod rolling stand such as the present invention .
  • Obj ect of the present invention is overcoming the disadvantage complained of through the use of a device which allows the axial forces to be directly discharged onto the support container of the rolling stand, creating a privileged passage for the forces , which allows the entire chain involved in the prior art to be discharged .
  • a device for counteracting the axial forces generated on the rolling cylinders during a rolling process , in which said rolling cylinders are supported by suitable chocks by means of radial bearings and axial bearings , said chocks being in turn supported by a container of the entire rolling stand, and is characteri zed in that it provides means suitable for transmitting said axial forces directly from said chocks to said container of the rolling stand, interposing between said chocks and said container of the rolling stand .
  • said means suitable for transmitting said axial forces directly from the chocks to the rolling stand housing, comprise a pair of shoes which are interposed between said chocks and said rolling stand housing .
  • the invention in question solves the drawbacks complained of s ince the axial forces no longer affect a kinematic chain and therefore do not cause wear of the relative members .
  • the contrast to the axial forces is obtained by means of rigid elements which are simultaneously in contact with the support container of the tie-rod rolling stand and with the chocks , said rigid elements being provided with means suitable for easily recovering any play which may be generated following wear .
  • FIG . 1 ( a, b ) are two views of a rolling stand in the area of the chocks, in which the device according to the invention is located;
  • FIG. 2 shows in detail the device according to the invention
  • FIG 3 shows a variation of the invention, suitable for particularly intense loads.
  • (1) indicates a rolling stand of the tie-rod type.
  • the upper rolling cylinder (2a) and the lower rolling cylinder (2b) are shown.
  • the upper rolling cylinder (2a) is supported by an upper chock (3a) by radial bearings (4a) and thrust bearings (5a) .
  • the lower rolling cylinder (2b) is supported by a lower chock (3b) by means of radial bearings (4b) and axial bearings (5b) .
  • the axial forces (FA) which are generated on the rolls (2a, 2b) during rolling, are transmitted to the chocks (3a, 3b) via the axial bearings (5a, 5b) and, from these, to a container (6) supporting the rolling stand (1) , via a device (10) , for contrasting the axial forces, according to the present invention.
  • Said device (10) is mounted on the upper and lower chocks (3a, 3b) of the front side of a rolling stand (1) .
  • FIG. 2 shows in detail the device (10) for contrasting the axial forces and, in the enlarged detail, the particular shape of the shoes (11, 12) which transmit the axial forces from the upper and lower chocks (3a, 3b) to a pair of gibs (13a, 13b) integral with the container (6) supporting the rolling stand (1) .
  • said gibs (13a, 13b) are fixed with screws to the gaskets (3a, 3b) so as to make them integral.
  • the device (10) according to the invention is interposed between the chocks (3a, 3b) and said container (6) of the rolling stand (1) , allowing the normal small relative oscillations that are generated during the rolling operations .
  • the upper cylinder (2a) transmits the axial force (FA) to the upper chock (3a) via the thrust bearing (5a) .
  • the upper gasket (3a) transmits two forces (FA/2) to the container (6) via a first pair of devices (10) , according to the invention.
  • the lower cylinder (2b) transmits its axial force (FA) to the lower chock (3b) via the thrust bearing (5b) .
  • the lower gasket (3b) transmits two forces (FA/2) to the container (6) via a second pair of devices (10) , according to the invention.
  • Each of said devices (10) comprises:
  • the device (10) further comprises adjustment means acting on at least one of said shoes (11, 12) to regulate the pressure on the gib (13a, 13b) and recover any play resulting from wear.
  • said adjustment means comprise one or more screws (14) , each provided with a locking nut (15) .
  • the screw (14) which acts on the adjustable shoe (12) , the pressure with which said adjustable shoe (12) presses on the gib (13a, 13b) is regulated and, with the locking nut (15) , the screw (14) itself is kept in position.
  • the adjustable shoe for example the second shoe (12) , comprises a first part (12a) in contact with the gib (13a, 13b) and a second part (12b) on which said adjustment screw (14) acts.
  • Said first part (12a) of the adjustable skate (12) has a concave surface which couples with a convex surface made on the second part (12b) of the adjustable skate (12) ; this allows the adjustable shoe (12) to follow the oscillations of the chock (3a, 3b) .
  • the fixed shoe (11) and the first part (12a) of the adjustable shoe (12) are made with a material resistant to corrosion, wear and strong stress, for example aluminium bronze.
  • the second part (12b) of the adjustable shoe (12) can be made with a cheaper material, for example C45 steel and with a hardened convex part.
  • the device for contrasting axial forces (FA) takes the form indicated with (20) , in which both shoes (21, 22) are fixed rather than adjustable.
  • the correct mobility of the chocks (3a, 3b) during the adjustment of the rolling gap is given by the precision of the machining tolerances of the seats of the pads (21, 22) .
  • a facet (23) is made to allow the oscillation of the chocks (3a, 3b) during rolling.
  • the devices (10, 20) according to the invention allow the axial forces (FA) generated during rolling to pass directly from the chocks (3a, 3b) to the container (6) supporting the rolling stand (1) , through the contact between the pads (11, 12, 21) and the gibs (13a, 13b) integral with said container (6) supporting the rolling stand (1) , without involvement of intermediate bodies.
  • the efforts, transmitted directly by the chocks (3a, 3b) to the gibs (13a, 13b) fixed directly to the container (6) supporting the rolling stand (1) are correctly resisted by the entire structure under stress, with the maximum guarantee of rigidity and non-deformability. This allows to avoid, in the following times, the periodic "heavy" maintenance, with a considerable reduction of costs, necessary for the restoration of the parts damaged/worn by the effects of the axial forces.

Abstract

A rolling bearing (1) is described comprising a device (10, 20) for contrasting the axial forces (FA) which are generated on rolling cylinders (2a, 2b) during a rolling process, in which said rolling cylinders (2a, 2b) are supported by suitable chocks (3a, 3b) by means of radial bearings (4a, 4b) and axial bearings (5a, 5b), said chocks (3a, 3b) being in turn supported by a container (6) of the rolling stand (1), the bearing providing means capable of transmitting the axial forces (FA) directly from the chocks (2a, 2b) to the container (6) of the rolling stand (1), interposing between the chocks (2a, 2b) and the container (6) of the rolling stand (1).

Description

DEVICE FOR BALANCING THE AXIAL FORCES GENERATED
DURING ROLLING OPERATIONS
The present invention refers to a device for contrasting the axial forces generated in a rolling process . In particular, the present invention refers to a rolling stand of the tie-rod type .
The main forces that are generated during rolling are in the radial direction and are opposed by suitable roller bearings . However, due to asymmetrically worn and/or incorrectly collimated rolling channels , axial forces are also generated which must be adequately counteracted .
The rolling cylinders therefore generate opposing axial forces which, passing through the radial bearings , are discharged onto the axial thrust bearings and, from here , through suitable members , onto the chocks of the machine . From these , they are discharged onto a container which acts as a support for a rolling stand .
All these members lengthen the chain of efforts and make the entire structure exposed to wear and deformation with heavy repercussions on the members for opening and closing the rolling gap ( screws , threaded nuts , guide bushings , etc . ) .
The above therefore translates into frequent maintenance interventions for the replacement of worn members and for restoring the correct assembly clearances .
US-A-3 851 934 discloses a conventional rolling stand, and not a tie-rod rolling stand such as the present invention .
Obj ect of the present invention is overcoming the disadvantage complained of through the use of a device which allows the axial forces to be directly discharged onto the support container of the rolling stand, creating a privileged passage for the forces , which allows the entire chain involved in the prior art to be discharged .
The above and other obj ects , as will be explained below, are achieved with the use of a device , for counteracting the axial forces generated on the rolling cylinders during a rolling process , in which said rolling cylinders are supported by suitable chocks by means of radial bearings and axial bearings , said chocks being in turn supported by a container of the entire rolling stand, and is characteri zed in that it provides means suitable for transmitting said axial forces directly from said chocks to said container of the rolling stand, interposing between said chocks and said container of the rolling stand .
According to a preferred embodiment , said means , suitable for transmitting said axial forces directly from the chocks to the rolling stand housing, comprise a pair of shoes which are interposed between said chocks and said rolling stand housing .
Preferred embodiments and non-trivial variations of the present invention form the subj ect matter of the dependent claims .
It is understood that all attached claims form an integral part of the present description .
The invention in question solves the drawbacks complained of s ince the axial forces no longer affect a kinematic chain and therefore do not cause wear of the relative members . The contrast to the axial forces is obtained by means of rigid elements which are simultaneously in contact with the support container of the tie-rod rolling stand and with the chocks , said rigid elements being provided with means suitable for easily recovering any play which may be generated following wear .
The fact that the axial forces are transmitted directly from the chocks to the rolling stand container, with the only means of a pair of gibs fixed directly to the support container of the rolling stand, allows these forces to be correctly faced by the entire structure under stress , with the maximum guarantee of rigidity and nondeformability . This allows to avoid, in the following times , the periodic "heavy" maintenance , with a considerable reduction of costs , necessary for the restoration of the parts damaged/worn by the ef fects of the axial forces .
It will be immediately obvious that innumerable variations and/or modi fications can be made to what is described ( for example relating to shape , dimensions , arrangements and parts with equivalent functions ) without departing from the scope of the invention, as appears from the attached claims .
The present invention will be better described by a preferred embodiment thereof , provided by way of non-limiting example , with reference to the attached drawings , in which :
- FIG . 1 ( a, b ) are two views of a rolling stand in the area of the chocks, in which the device according to the invention is located;
- FIG. 2 shows in detail the device according to the invention;
- FIG 3 shows a variation of the invention, suitable for particularly intense loads.
With reference to FIG. la and lb, (1) indicates a rolling stand of the tie-rod type. In particular, in FIG. la the upper rolling cylinder (2a) and the lower rolling cylinder (2b) are shown.
The upper rolling cylinder (2a) is supported by an upper chock (3a) by radial bearings (4a) and thrust bearings (5a) .
Similarly, the lower rolling cylinder (2b) is supported by a lower chock (3b) by means of radial bearings (4b) and axial bearings (5b) .
The axial forces (FA) which are generated on the rolls (2a, 2b) during rolling, are transmitted to the chocks (3a, 3b) via the axial bearings (5a, 5b) and, from these, to a container (6) supporting the rolling stand (1) , via a device (10) , for contrasting the axial forces, according to the present invention.
Said device (10) is mounted on the upper and lower chocks (3a, 3b) of the front side of a rolling stand (1) .
FIG. 2 shows in detail the device (10) for contrasting the axial forces and, in the enlarged detail, the particular shape of the shoes (11, 12) which transmit the axial forces from the upper and lower chocks (3a, 3b) to a pair of gibs (13a, 13b) integral with the container (6) supporting the rolling stand (1) .
As shown in FIG. la, said gibs (13a, 13b) are fixed with screws to the gaskets (3a, 3b) so as to make them integral. The device (10) according to the invention is interposed between the chocks (3a, 3b) and said container (6) of the rolling stand (1) , allowing the normal small relative oscillations that are generated during the rolling operations .
In practice, there are four devices (10) according to the invention which transmit the axial forces from the chocks (3a, 3b) to the container (6) of the rolling stand (1) .
In particular, the upper cylinder (2a) transmits the axial force (FA) to the upper chock (3a) via the thrust bearing (5a) . The upper gasket (3a) , in turn, transmits two forces (FA/2) to the container (6) via a first pair of devices (10) , according to the invention.
Similarly, the lower cylinder (2b) transmits its axial force (FA) to the lower chock (3b) via the thrust bearing (5b) . The lower gasket (3b) , in turn, transmits two forces (FA/2) to the container (6) via a second pair of devices (10) , according to the invention.
Each of said devices (10) comprises:
- a first shoe (11) positioned and fixed on a first side of a gib (13a, 13b) made integral with the chocks (3a, 3b) ;
- a second shoe (12) , positioned and fixed on the opposite side of said gib (13a, 13b) ; a pair of said gibs (13a, 13b) , fixed directly to the container (6) supporting the rolling stand (1) , on which said shoes (11) and (12) slide.
According to a preferred embodiment, the device (10) further comprises adjustment means acting on at least one of said shoes (11, 12) to regulate the pressure on the gib (13a, 13b) and recover any play resulting from wear.
According to a preferred embodiment, said adjustment means comprise one or more screws (14) , each provided with a locking nut (15) . By means of the screw (14) , which acts on the adjustable shoe (12) , the pressure with which said adjustable shoe (12) presses on the gib (13a, 13b) is regulated and, with the locking nut (15) , the screw (14) itself is kept in position.
According to a preferred embodiment, the adjustable shoe, for example the second shoe (12) , comprises a first part (12a) in contact with the gib (13a, 13b) and a second part (12b) on which said adjustment screw (14) acts. Said first part (12a) of the adjustable skate (12) has a concave surface which couples with a convex surface made on the second part (12b) of the adjustable skate (12) ; this allows the adjustable shoe (12) to follow the oscillations of the chock (3a, 3b) .
The fixed shoe (11) and the first part (12a) of the adjustable shoe (12) are made with a material resistant to corrosion, wear and strong stress, for example aluminium bronze. The second part (12b) of the adjustable shoe (12) can be made with a cheaper material, for example C45 steel and with a hardened convex part.
According to a preferred embodiment shown in FIG. 3, suitable for particularly high axial forces, the device for contrasting axial forces (FA) according to the invention takes the form indicated with (20) , in which both shoes (21, 22) are fixed rather than adjustable. The correct mobility of the chocks (3a, 3b) during the adjustment of the rolling gap is given by the precision of the machining tolerances of the seats of the pads (21, 22) . Furthermore, on the faces of said shoes (21, 22) in contact with the gib (13a, 13b) , a facet (23) is made to allow the oscillation of the chocks (3a, 3b) during rolling.
As is clear from the above description, the devices (10, 20) according to the invention allow the axial forces (FA) generated during rolling to pass directly from the chocks (3a, 3b) to the container (6) supporting the rolling stand (1) , through the contact between the pads (11, 12, 21) and the gibs (13a, 13b) integral with said container (6) supporting the rolling stand (1) , without involvement of intermediate bodies. The efforts, transmitted directly by the chocks (3a, 3b) to the gibs (13a, 13b) fixed directly to the container (6) supporting the rolling stand (1) , are correctly resisted by the entire structure under stress, with the maximum guarantee of rigidity and non-deformability. This allows to avoid, in the following times, the periodic "heavy" maintenance, with a considerable reduction of costs, necessary for the restoration of the parts damaged/worn by the effects of the axial forces.

Claims

1. Rolling stand (1) of a tie-rod type, comprising a device (10, 20) for contrasting the axial forces (FA) which are generated on rolling cylinders (2a, 2b) during a rolling process, in which said rolling cylinders (2a, 2b) are supported by suitable chocks (3a, 3b) by means of radial bearings (4a, 4b) and axial bearings (5a, 5b) , said chocks (3a, 3b) being in turn supported by a container (6) of the rolling stand (1) , characterized in that it provides means suitable for transmitting said axial forces (FA) directly from said chocks (2a, 2b) to said container (6) of said rolling stand (1) , interposing between said chocks (2a, 2b) and said container (6) of the rolling stand (1) ; wherein said means suitable for transmitting said axial forces directly from said chocks (2a, 2b) to said container (6) of said rolling stand (1) , interposing themselves between chocks (2a, 2b) and container (6) comprise:
- a first shoe (11, 21) positioned and fixed on a first side of a gib (13a, 13b) ;
- a second shoe (12, 22) positioned and fixed on the opposite side of said gib (13a, 13b) ; a pair of said gibs (13a, 13b) , fixed directly to the container (6) supporting the rolling stand (1) , on which said shoes (11, 12, 21, 22) slide.
2. Rolling stand (1) according to claim 1, characterized in that it provides adjustment means, acting on at least one of said shoes (11, 12, 21, 22) suitable for regulating the pressure on the gib (13a, 13b) and recovering any play resulting from wear .
3. Rolling stand (1) according to claim 2, characterized in that said adjustment means comprise one or more screws (14) , each hone equipped with a locking nut (15) , said screw (14) acting on the adjustable shoe (11, 12, 21, 22) , in order to regulate the pressure on the gib (13, 13b) and recover possible slacks, said screw (14) being kept in position by said locking nut (15) .
4. Rolling stand (1) according to claims 2 and 3, characterized in that said at least one adjustable shoe (12) comprises a first part (12a) in contact with the gib (13a, 13b) and a second part (12b) on which said adjustment screw (14) acts, said first part (12a) of the adjustable shoe (12) having a concave surface which couples with a convex surface made on the second part (12b) of said adjustable shoe (12) , so as to allow the adjustable shoe (12) to follow the oscillations of the chock (3a, 3b) .
5. Rolling stand (1) according to claim 1, characterized in that both shoes (21, 22) are fixed rather than adjustable.
6. Rolling stand (1) according to claim 5, characterized in that a facet (23) is made on the faces of said shoes (21, 22) in contact with the gib (13a, 13b) to allow the chocks (3a, 3b) to oscillate during rolling.
7. Rolling stand (1) according to at least one of claims from 1 to 6, characterized in that at least the part of the shoes (11, 12, 21, 22) in contact with said gibs (13a, 13b) is made of aluminium bronze.
PCT/IT2023/050176 2022-07-29 2023-07-26 Device for balancing the axial forces generated during rolling operations WO2024023863A1 (en)

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IT102022000016032 2022-07-29

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851934A (en) 1972-04-21 1974-12-03 Skf Ind Trading & Dev Journal for rolls
US4037450A (en) * 1975-11-17 1977-07-26 Morgan Construction Company Apparatus for supporting bearing chocks in a rolling mill
SE401624B (en) * 1977-03-08 1978-05-22 Morgan Construction Co DEVICE AT BEARING BLOCK IN ROLLING MILL
DE2743560A1 (en) * 1977-09-28 1979-03-29 Schloemann Siemag Ag Screw spindles operated by worm gear drive - connect adjustable rolling cylinder mounting bridges
DE7921861U1 (en) * 1979-10-25 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Device for the storage of heavily loaded rolls for duo rolling mills

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7921861U1 (en) * 1979-10-25 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Device for the storage of heavily loaded rolls for duo rolling mills
US3851934A (en) 1972-04-21 1974-12-03 Skf Ind Trading & Dev Journal for rolls
US4037450A (en) * 1975-11-17 1977-07-26 Morgan Construction Company Apparatus for supporting bearing chocks in a rolling mill
SE401624B (en) * 1977-03-08 1978-05-22 Morgan Construction Co DEVICE AT BEARING BLOCK IN ROLLING MILL
DE2743560A1 (en) * 1977-09-28 1979-03-29 Schloemann Siemag Ag Screw spindles operated by worm gear drive - connect adjustable rolling cylinder mounting bridges

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