US3869898A - Roll changing device for a mill or a similar machine - Google Patents

Roll changing device for a mill or a similar machine Download PDF

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Publication number
US3869898A
US3869898A US432781A US43278174A US3869898A US 3869898 A US3869898 A US 3869898A US 432781 A US432781 A US 432781A US 43278174 A US43278174 A US 43278174A US 3869898 A US3869898 A US 3869898A
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United States
Prior art keywords
rolls
rail
mill
roll
chocks
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Expired - Lifetime
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US432781A
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English (en)
Inventor
Andre Quehen
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Secim SA
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Secim SA
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    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing

Definitions

  • Each rail is displaced by an hy- [56] References cued draulic cylinder and lifts the assemblies of roll chocks UNITED STATES PATENTS as a unit until the rails align with tracks arranged ex- 3,171,304 3/1965 Sims et a1. 72/241 y 0f the mill 3,312,096 4/1967 Stubbs et al. 72/238 F, 3,376,724 4/1968 Wolfendale et a1 72/239 1 Clam, 2 D'awmg Pmmioum 1 1915 $869,898
  • the present invention relates to a roll changing device intended for rolling mills of similar machines. It applies, more particularly, to the work rolls of a 4-high mill, but may also find application for use with other machines in which the working components are rolls between which passes a product to be transformed and which rolls are subject to wear and surface deterioration requiring frequent changing.
  • All the devices known for quick roll change of the rolls of a rolling mill consist of the extraction or introduotion in the roll stand of a complete set of rolls equipped with their bearings and their chocks; the rolls being placed one on top of the other. This moving as sembly (rolls-chocks) is traversed either by rolling or sliding.
  • the present invention which allows for the solution of these difficulties applies to a mill or a similar machine including in a stand at least two rolls mounted in their chocks, the rolls and chocks being a moving assembly to be changed and being designed with traverse components for sliding or rolling capable of supporting the assembly and provided with means for maintaining a fixed distance between the centerlines of each roll and the traverse components, the mill or similar ma chine including guide components arranged parallel to the centerline of the roll and on the outside with regard to the chocks, and also including means for displacement of the moving assembly, when supported, on the fixed guide components.
  • the device more particularly, includes symmetrically on the entry and delivery sides of the stand: a track movable parallel to the centerline of the rolls and having a form similar to that of the traverse components of the moving assembly, guides of the movable track in which said tracks are arranged parallel to themselves adapted to move from a resting position where they are completely retracted and a work position where they become the extension of the fixed guide components outside the chocks; the track adapted to come into contact with the traverse components of the moving equipment at an intermediate position between its resting position and work position, and means for displacing the movable tracks between their two extreme positions, these means being capable of supplying enough force to lift the moving assembly when the guides come into contact with the traverse components of the assembly.
  • the tracks and the means of displacement of each movable track are tied to a separator support located at the bottompart between the housing posts of the mill or simi lar machine.
  • each movable track is arranged on an angle with regard to the plane of the centerlines of the rolls; each movable track, therefore, passing above the bottom backup roll.
  • FIG. 1 is a simplified elevational view of a 4-high mill equipped with a device according to the invention.
  • FIG. 2 is a longitudinal section through the mill shown in FIG. 1 in which the left part of the figure is a section A-A of FIG. 1; the right part of the figure is a section BB of FIG. 1.
  • the mill consists of two housings l and 2 in the windows of which are arranged, on one hand, a pair of chocks 4 and 5 of the top and bottom backup rolls 6 and 7; on the other hand, a pair of chocks 8 and 9 of the top and bottom work rolls l0 and 11.
  • the chocks 8 and 9 of the work rolls are displaceable inside the openings of the corresponding chocks 4 and 5 of the backup rolls.
  • Roll balance cylinders 13 are located between each cooperative pair of the chocks 8 and 9.
  • the drive and operation side bottom checks 9 are connected at the bottom by two sleds 14 extended laterally beyond each of the housings 1 and 2 as best seen in FIG. 2.
  • separator supports 16 are fitted at the bottom part of the housing posts to which they are fixed by means of the bearing plates 17. As best shown in FIG. 2, the separator supports 16 each support two guide boxes 18 arranged symmetrically about the centerline of the mill. Each box 18 includes a sleeve 19 fitted with a bushing 20 in which slides a cylindrical post 21. On each side of the mill, the two heads of the posts 21 are secured to a track or rail 22 fitted with a liner 12. The 23. and post assembly forms a sliding assembly allowing for a parallel displacement of the rail 22. It should, particularly in FIG.
  • each support 16 includes an opening in which an hydraulic cylinder 28 is mounted and pivoted on the support 16 on trunnions "24 fitted in well-known type bearings and represented on the drawings in a simplified way.
  • the rod 25 of the cylinder 28 is connected to the rail 22 by means of bearing plate 26 in which a nut 27 allows for the adjustment of the cylinder rod length.
  • the top backup roll 6 is first raised by means of its balance cylinder, not shown. Then, the roll balance cylinders 13 between the chocks 8 and 9 of the work rolls l0 and 11 are used to bring the center distance of the work rolls to a predetermined distance which may, for instance, be that of the corresponding center distance of a pair of new rolls while the rolls are continued to be so maintained.
  • the cylinders 28 are pressurized, which raises the rails 22 towards the vertical centerline of the mill.
  • the rails will first touch by their liners 23 the bottom faces of the sleds 14, which elevation depends upon the wear of the bottom work roll 11.
  • the rail assembly and the work rolls-chock assemblies 8 and 9 are raised.
  • the sleds 14 fixed on the chocks are exactly in line with the fixed track 30 located outside the mill, as shown in FIG. 1, while the bottom work roll 11 is raised out of contact with the bottom backup roll 7.
  • the centerlines of the two work rolls will be at a fixed predetermined distance with regard to the fixed track 30. It is then easy to hook the rolls to the extraction and introduction rig which may be of any well-known type, for instance, by hydraulic or air cylinder or by a cable and drum arrangement in which the extraction and introduction mechanism may be located on either the drive side or the operating side of the mill.
  • the extraction and introduction rig may be of any well-known type, for instance, by hydraulic or air cylinder or by a cable and drum arrangement in which the extraction and introduction mechanism may be located on either the drive side or the operating side of the mill.
  • the invention is not limited to the example described above, but it may also apply to other designs which will only differ in detail or the use of equivalent means. Therefore, the invention may be applied with any method of extraction of the rolls and the sliding tracks described may be replaced by rolling tracks if the moving assembly were equipped with wheels as known.
  • the sleds 14 do not necessarily have to be fixed to the bottom work roll chocks. In other mill designs such a sled may be located at the bottom of the legs of the top work roll chocks; the bottom chocks are then allowed to slide between these legs and remain suspended during roll changing. This would be another method of keeping the center distance between work rolls at a fixed predetermined distance during the roll change operations.
  • devices other than hydraulic cylinders and other arrangements than guide boxes can be employed, which arrangements will have the essential function of providing for parallel displacement of the rails 22 by providing a vertical force sufficient to lift the movable assembly of the work rolls and its chocks.
  • a housing having a window for receiving at least two rolls mounted in chocks, said rolls and chocks constituting an assembly unit to be removed from said housing,
  • said assembly unit including means for transferring said two rolls and their chocks out of said stand and also including means for maintaining fixed distances between the axes of rotation of said rolls and said transferring means,
  • rail means movable parallel to the axes of rotation of said rolls, so constructed and arranged that their planes of displacements are set at an angle with respect to a plane passing through the axes of rotation of rolls such that the rail means are passable above the lowermost roll of said mill and in which said rail means have support means for supporting and guiding said transferring means while said assembly unit is within said window,
  • said displacing means capable of carrying said roll assembly unit when said rail means are brought into a supporting relationship with said transferring means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US432781A 1973-02-22 1974-01-11 Roll changing device for a mill or a similar machine Expired - Lifetime US3869898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7306229A FR2218953B1 (enrdf_load_stackoverflow) 1973-02-22 1973-02-22

Publications (1)

Publication Number Publication Date
US3869898A true US3869898A (en) 1975-03-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US432781A Expired - Lifetime US3869898A (en) 1973-02-22 1974-01-11 Roll changing device for a mill or a similar machine

Country Status (3)

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US (1) US3869898A (enrdf_load_stackoverflow)
ES (1) ES422200A1 (enrdf_load_stackoverflow)
FR (1) FR2218953B1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321815A (en) * 1978-10-19 1982-03-30 Wirth Maschinen-Und Bohrgerate-Fabrik Gmbh Apparatus for interchangeable mounting of rollers, particularly in a straightening machine
DE4004286C1 (enrdf_load_stackoverflow) * 1990-02-13 1991-02-21 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover, De
US6038905A (en) * 1998-04-17 2000-03-21 Danieli & C. Officine Meccaniche Spa Device to remove working rolls in a four-high rolling stand

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2114428B1 (es) * 1994-12-22 1999-03-01 Comercial De Tecnologia Sanita Mecanismo graduable y desmontable para el arrastre de material laminar mediante pares de rodillos.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171304A (en) * 1961-07-10 1965-03-02 Davy & United Eng Co Ltd Rolling mills
US3312096A (en) * 1963-10-03 1967-04-04 Davy & United Eng Co Ltd Rolling mills
US3376724A (en) * 1966-04-05 1968-04-09 Mesta Machine Co Automatic roll changing means and methods of roll changing
US3585831A (en) * 1969-04-03 1971-06-22 Mesta Machine Co Rolling mill structure and roll changing means therefor
US3651679A (en) * 1969-01-03 1972-03-28 United Eng Foundry Co Rolling mill
US3698226A (en) * 1971-07-01 1972-10-17 Blaw Knox Foundry Mill Machine Roll changers
US3733876A (en) * 1971-02-03 1973-05-22 Mesta Machine Co Mill roll changing arrangement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738142A (en) * 1971-05-24 1973-06-12 United Eng Foundry Co Rolling mill

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171304A (en) * 1961-07-10 1965-03-02 Davy & United Eng Co Ltd Rolling mills
US3312096A (en) * 1963-10-03 1967-04-04 Davy & United Eng Co Ltd Rolling mills
US3376724A (en) * 1966-04-05 1968-04-09 Mesta Machine Co Automatic roll changing means and methods of roll changing
US3651679A (en) * 1969-01-03 1972-03-28 United Eng Foundry Co Rolling mill
US3585831A (en) * 1969-04-03 1971-06-22 Mesta Machine Co Rolling mill structure and roll changing means therefor
US3733876A (en) * 1971-02-03 1973-05-22 Mesta Machine Co Mill roll changing arrangement
US3698226A (en) * 1971-07-01 1972-10-17 Blaw Knox Foundry Mill Machine Roll changers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321815A (en) * 1978-10-19 1982-03-30 Wirth Maschinen-Und Bohrgerate-Fabrik Gmbh Apparatus for interchangeable mounting of rollers, particularly in a straightening machine
DE4004286C1 (enrdf_load_stackoverflow) * 1990-02-13 1991-02-21 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover, De
US6038905A (en) * 1998-04-17 2000-03-21 Danieli & C. Officine Meccaniche Spa Device to remove working rolls in a four-high rolling stand

Also Published As

Publication number Publication date
FR2218953A1 (enrdf_load_stackoverflow) 1974-09-20
ES422200A1 (es) 1976-04-01
FR2218953B1 (enrdf_load_stackoverflow) 1975-04-04

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