US2938706A - Roll changing device - Google Patents

Roll changing device Download PDF

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Publication number
US2938706A
US2938706A US442041A US44204154A US2938706A US 2938706 A US2938706 A US 2938706A US 442041 A US442041 A US 442041A US 44204154 A US44204154 A US 44204154A US 2938706 A US2938706 A US 2938706A
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US
United States
Prior art keywords
sledge
cylinder
track
piston
changing device
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
Application number
US442041A
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English (en)
Inventor
Langen Mathias
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Loewy Engineering Co Ltd
Original Assignee
Loewy Engineering Co Ltd
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 Loewy Engineering Co Ltd filed Critical Loewy Engineering Co Ltd
Application granted granted Critical
Publication of US2938706A publication Critical patent/US2938706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B31/103—Manipulators or carriages therefor
    • 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

Definitions

  • This invention relates to a roll changing device for a rolling mill and, in particular, to a roll changing device in which the rolls are inserted into the mill stand or withdrawn therefrom by being moved sideways with respect to the mill stand.
  • Roll changing devices of this type are particularly useful in connection with rolling mills in which the separating forces are considerable, such as four-high mills, and where, consequently, large screwdown gears are required, as the sideways movement of the rolls makes it possible for the rolling mill housings to have closed tops, whereby their strength and rigidity are greatly improved, particularly in that part which accommodates the Screwdown gear.
  • a roll changing device of the type above referred to comprises generally a movable support or carrier in the form of a Sledge receiving the rolls, together with any attachments, Such as their bearings or chocks, the sledge being adapted to be moved sideways with respect to the rolling mill Stand along a track to a point outside and adjacent the mill stand where the rolls can be taken oi the Sledge and replaced by another roll assembly.
  • the shifting means according to the invention are of the hydraulic type and they comprise accordingly a pres- Sure-fluid cylinder and a double-acting piston. Of these two elements, one is connected directly to the Sledge, while the other canslide along a track and be immobilized at spaced-apart and pre-selected points 'on that track.
  • the track for the slidable 'element may be the same as that for the sledge.
  • the element 'connected to the Sledge is preferably formed by the double-acting piston, and the slidable element formed by the cylinder, although the arrangement can be reversed.
  • Displacement of the piston in the cylinder, with the cylinder locked to the track will result in a corresponding displacement of the Sledge along its track.
  • Displacement of the piston in the cylinder, with the cylinder free to slide along the track and the sledge loaded with a set of rolls will result in -a corresponding displacement of' the cylinder along the track, as the piston and the Sledge will be immobilized by the weight of the rolls on the Sledge. In this way, the cylinder can be moved towards or away from the mill stand by a distance equal to the stroke of the piston.
  • This arrangement and mode of operation permits the movement of the Sledge along its track by a total distance which is a multiple of the stroke of the piston relative to the cylinder, simply by alternately admitting pressure-fluid to opposite sides of the piston and freeing or locking the cylinder to the track at alternate Strokes of the piston.
  • the length of the stroke of the piston, and accordingly the length of the cylinder required for moving the sledge in or out of the mill Stand by a given distance can be greatly reduced and need only be a fraction of the stroke which would otherwise be required to move the Sledge by the same distance.
  • the Shifting means according to the invention are therefore comparatively simple and inexpensive and do not require excessive space for their accommodation adjacent the rolling mill stand.
  • control means are provided for alternately admitting pressure-duid to opposite Sides of the double-acting cylinder.
  • Locking means may be provided for immobilizing the slidable elements at spaced-apart and pre-selected points along its track. These locking means may be in the form of pivoted pawls engageable in notches provided at spacedapart and pre-selected points along the track.
  • Fig. 1 is a front elevation showing a roll changing device according to the invention applied to a four-high rolling mill, with its hydraulic shifting means in section.
  • Figs. 2, 3, 4, 5 and 6 show, on a somewhat larger scale, various positions which the hydraulic Shifting means take up during a movement away from and towards the rolling mill stand.
  • Fig. 7 is a plan view of the roll changing device of Fig. 1.
  • Fig. 8 is a cross-section through the hydraulic shifting means according to line 8 8 of Fig. l.
  • Fig. 9 is a cross-section through the hydraulic shifting means according to line 9--9 of Fig. 1.
  • the rolling mill to which the roll changing device according to the invention is applied, is generally designated with 10. It is shown here as a fourhigh mill comprising work rolls 11, 12 and back-up rolls 13, 14. The chocks for the four rolls 11 to 14 are not separately shown as they are immaterial for the 'present first pull-out movement of the sledge 20.
  • the roll' changing device comprises a sledge 20 which ,is adapted to receive the roll assembly 17 and which can be moved together with a roll assembly into and sideways out of the rolling mill stand 10.
  • the sledge 20 is movable along a track 21 by hydraulic shiftingV means generally designated-by 22. These means comprise a cylinder element 23 and a double-acting piston element 24.
  • the piston has a piston rod 25 which, at its end, carries a hook 26 adapted to enter a notch 27 in the sledge 20.
  • the cylinder 23 is displaceable along the same track as the sledge 20, and its base-plate 28 is provided to this end with shoes 29v slidable along the track V21 (Fig. 9).
  • pawls 30 which can swing in opposite directions about pins 31 formed on cylinder bosses 32 (Fig. 8). These pawls co-operate with notches 33 arranged on the track 21 at stations A, B and C which are spaced-apart by a distance equal to the stroke length of the piston 24. AtV each of these three stations there are on each side of the track two notches 33 which form together dovetails 34 on the track 21. The notches 33 on the mill stand side of the dove-tail 34 are engaged by the pawls 30 during the inward travel of the Sledge and the notches at the opposite side of the dove-tail at the outward travel of the Sledge.
  • Each pawl 30 has accordingly two lugs with inclined faces 35 which can be alternately made to engage ⁇ one of the two notches 33 at opposite sides of a dove-tail 34 by tilting a pawl 30 about its pivot pin 31. Tilting of the pawls 30 is effected by means of weighted rocking arms 36 attached tothe pawls.V
  • the transition from a notch 33 to the upper level of the track 21 is formed by a slope 37 which acts as a cam-face for tilting a pawl on its becomingdisengaged from a notch, so that Ythe pawl can ride and pressure-fluid is, therefore, admitted to the right of the piston 24, whilst the pressure-fluid on the leftof the piston is exhausted.
  • the hydraulicY shifting device 22 is now ready for another stroke of the piston 24. This is effected by reversing again the connections of the hydraulic cylinder 23 by means of the hydraulic control valve 44, pressureiiuid being admitted to the left of the piston 24 yand exhausted from the right, in the same way as during the iirst step.
  • the piston, together With the sledge 20, is thereby moved Yaway'from the mill stand 10 by another stroke length, its position at the end of the stroke and that of the Sledge hook 26 beingV indicated in dotted lines in lig. 3. This is the second pull-out movement.
  • Stops 45, 46 co-operate with ears 47 protruding from the four corners of the base-plate'28.
  • the track 21 for the shifting means 22 is preferably located in a pit below iloor level, a second somewhat deeper pit being provided alongside the track for accommodating the loops formed by the flexible hoses 38 and 39 (Figs.
  • the cylinder 23 is now moved towards the mill stand 10 by reversing the position of the controlvalve 44, with the sledge being immobilized ⁇ owing .to the weight of the roll assembly.
  • the cylinder travels back until its pawls 30 enter the notches 33 at B.
  • the alternate movements of piston 24 and cylinder 23 are-repeated, as indicatedin Fig. 6, until the cylinder has reached the position in which its pawls 30 enter the notches 33'at A, and until the sledge 20 is inside the rolling mill stand 10.
  • shifting means having a The invention is capable of embodiments other than those shown here.
  • the operation of the shifting means can be made automatic by providing electric limit switches alongside the track which actuate the hydraulic control valve for the pressure-duid if and vwhen the cylinder and What I claim is:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Rolling (AREA)
US442041A 1953-07-09 1954-07-08 Roll changing device Expired - Lifetime US2938706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19030/53A GB750425A (en) 1953-07-09 1953-07-09 Roll-changing device

Publications (1)

Publication Number Publication Date
US2938706A true US2938706A (en) 1960-05-31

Family

ID=10122587

Family Applications (1)

Application Number Title Priority Date Filing Date
US442041A Expired - Lifetime US2938706A (en) 1953-07-09 1954-07-08 Roll changing device

Country Status (4)

Country Link
US (1) US2938706A (fr)
DE (1) DE969430C (fr)
FR (1) FR1103957A (fr)
GB (1) GB750425A (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136182A (en) * 1959-03-28 1964-06-09 Demag Ag Replacement of roll stands in rolling mills
US3146643A (en) * 1959-03-28 1964-09-01 Demag Ag Rolling mills
US3180125A (en) * 1962-08-15 1965-04-27 United Eng Foundry Co Roll changing apparatus
US3194046A (en) * 1961-12-28 1965-07-13 Davy & United Eng Co Ltd Device for changing rolls in horizontal rolling mills
US3208260A (en) * 1960-08-18 1965-09-28 United Eng Foundry Co Rolling mill
US3254875A (en) * 1964-01-22 1966-06-07 Dempster Brothers Inc Transporting equipment
US3339941A (en) * 1965-05-07 1967-09-05 Ray A Braunberger Lock for sliding fifth-wheel trunnions
US3394576A (en) * 1964-06-15 1968-07-30 United Eng Foundry Co Rolling mill
DE1283184B (de) * 1962-03-09 1968-11-21 United Eng Foundry Co Verfahren und Vorrichtung zum Wechseln der Walzen eines Walzwerks
US3431765A (en) * 1964-10-14 1969-03-11 Lombard Corp Hydraulic extrusion press
DE1292103B (de) * 1962-07-20 1969-04-10 Blaw Knox Co Walzgeruest fuer ein Pilgerschrittwalzwerk mit seitlich auswechselbaren Walzen
US3456919A (en) * 1966-11-14 1969-07-22 Brooks & Perkins Pallet positioner for aircraft cargo handling system
US3567044A (en) * 1968-09-03 1971-03-02 Bobby J Travis Apparatus for force application
US3993206A (en) * 1974-02-08 1976-11-23 Mitsubishi Jukogyo Kabushiki Kaisha Power slide mechanism
US4020745A (en) * 1974-11-05 1977-05-03 Mitsubishi Jukogyo Kabushiki Kaisha Power slide mechanism
US4066110A (en) * 1958-10-24 1978-01-03 Sarno Richard L Apparatus for splitting logs
CN114535306A (zh) * 2022-03-22 2022-05-27 重庆钢铁股份有限公司 一种热连轧轧机上支承辊快换方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122030B (de) * 1956-09-10 1962-01-18 Loewy Eng Co Ltd Hydraulische Streckmaschine fuer metallische Werkstuecke
DE1044746B (de) * 1957-10-21 1958-11-27 Schloemann Ag Universalgeruest mit in der gleichen Ebene liegenden Horizontal- und Vertikalwalzen
DE1263594B (de) * 1963-10-25 1968-03-14 Schierholz Kg Louis Vorrichtung zum Foerdern von Dung oder dergleichen Gut
DE3019052C2 (de) * 1980-05-19 1985-10-10 Maschinen- Und Werkzeugbau Gmbh, 4600 Dortmund Vorrichtung zum Auswechseln der Arbeitswalzen von Walzgerüsten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US749745A (en) * 1903-09-10 1904-01-19 Bethlehem Steel Corp Rolling-mill.
US1656748A (en) * 1925-12-14 1928-01-17 Schloemann Ag Rolling mill
US2657009A (en) * 1951-09-07 1953-10-27 Edgar C Alexander Jack
US2696313A (en) * 1952-11-04 1954-12-07 Sperry Corp Wagon self-unloader

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE620068C (de) * 1934-03-20 1935-10-14 Demag Akt Ges Rohrreduzierwalzwerk mit mehreren hintereinander angeordneten und um 90íÒ gegeneinander versetzten Walzgeruesten
DE693225C (de) * 1936-10-21 1940-07-04 Meer Akt Ges Maschf Walzwerk mit mehreren hintereinanderliegenden und abwechselnd senkrecht stehende und waagerecht liegende Walzen enthaltenden Geruesten
DE903807C (de) * 1943-01-20 1954-02-11 Schloemann Ag Duo-Kaliber-Walzwerk, bei dem bei axial festliegender Oberwalze die Unterwalze axial einstellbar und ein Schlitten zum seitlichen Ausbau der Walzen vorgesehen ist
DE856735C (de) * 1950-04-23 1952-11-24 Erich Schulte Einrichtung zum Auswechseln von auszutauschenden Walzensaetzen
DE931705C (de) * 1952-12-18 1955-08-16 Schloemann Ag Vorrichtung zum Verschieben eines Walzgeruestes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US749745A (en) * 1903-09-10 1904-01-19 Bethlehem Steel Corp Rolling-mill.
US1656748A (en) * 1925-12-14 1928-01-17 Schloemann Ag Rolling mill
US2657009A (en) * 1951-09-07 1953-10-27 Edgar C Alexander Jack
US2696313A (en) * 1952-11-04 1954-12-07 Sperry Corp Wagon self-unloader

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066110A (en) * 1958-10-24 1978-01-03 Sarno Richard L Apparatus for splitting logs
US3136182A (en) * 1959-03-28 1964-06-09 Demag Ag Replacement of roll stands in rolling mills
US3146643A (en) * 1959-03-28 1964-09-01 Demag Ag Rolling mills
US3208260A (en) * 1960-08-18 1965-09-28 United Eng Foundry Co Rolling mill
DE1294315B (de) * 1960-08-18 1969-05-08 United Eng Foundry Co Vorrichtung zum schnellen Ausbau und Auswechseln der Walzen eines Metallwalzwerkes
US3194046A (en) * 1961-12-28 1965-07-13 Davy & United Eng Co Ltd Device for changing rolls in horizontal rolling mills
DE1283184B (de) * 1962-03-09 1968-11-21 United Eng Foundry Co Verfahren und Vorrichtung zum Wechseln der Walzen eines Walzwerks
DE1292103B (de) * 1962-07-20 1969-04-10 Blaw Knox Co Walzgeruest fuer ein Pilgerschrittwalzwerk mit seitlich auswechselbaren Walzen
US3180125A (en) * 1962-08-15 1965-04-27 United Eng Foundry Co Roll changing apparatus
US3254875A (en) * 1964-01-22 1966-06-07 Dempster Brothers Inc Transporting equipment
US3394576A (en) * 1964-06-15 1968-07-30 United Eng Foundry Co Rolling mill
US3431765A (en) * 1964-10-14 1969-03-11 Lombard Corp Hydraulic extrusion press
US3339941A (en) * 1965-05-07 1967-09-05 Ray A Braunberger Lock for sliding fifth-wheel trunnions
US3456919A (en) * 1966-11-14 1969-07-22 Brooks & Perkins Pallet positioner for aircraft cargo handling system
US3567044A (en) * 1968-09-03 1971-03-02 Bobby J Travis Apparatus for force application
US3993206A (en) * 1974-02-08 1976-11-23 Mitsubishi Jukogyo Kabushiki Kaisha Power slide mechanism
US4020745A (en) * 1974-11-05 1977-05-03 Mitsubishi Jukogyo Kabushiki Kaisha Power slide mechanism
CN114535306A (zh) * 2022-03-22 2022-05-27 重庆钢铁股份有限公司 一种热连轧轧机上支承辊快换方法

Also Published As

Publication number Publication date
DE969430C (de) 1958-06-04
GB750425A (en) 1956-06-13
FR1103957A (fr) 1955-11-15

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