US3593554A - Rolling mills - Google Patents

Rolling mills Download PDF

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Publication number
US3593554A
US3593554A US847322A US3593554DA US3593554A US 3593554 A US3593554 A US 3593554A US 847322 A US847322 A US 847322A US 3593554D A US3593554D A US 3593554DA US 3593554 A US3593554 A US 3593554A
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US
United States
Prior art keywords
chock
beams
assemblies
pair
rolling mill
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
US847322A
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English (en)
Inventor
Eric Owen Swift
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.)
Davy Loewy Ltd
Original Assignee
Davy Loewy 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 Davy Loewy Ltd filed Critical Davy Loewy Ltd
Application granted granted Critical
Publication of US3593554A publication Critical patent/US3593554A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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 novelty resides particularly in that the wheels on adjacent chocks engage the same beams with the wheels on one chock behind the wheels on the other chock and in this way the processing rolls and their chocks can be withdrawn together from the mill housings at fixed centers and with the rolls spaced apart.
  • This invention relates to rolling mills and in particular to a construction of rolling mill which enables the pair of processing rolls of the mill, during roll changing, to be withdrawn from and introduced into the mill housings as a pair in fixed spaced-apart relation.
  • the processing rolls of a rolling mill have to be changed at regular intervals and it is necessary for the time taken to.
  • a rolling mill comprises a pair of spaced-apart housings each of which defines a window receiving the bearing chock assemblies carried at one end of each of a pair of processing rolls, one'of the pair of chocks of the processing rolls in each window being positioned in the other and each carrying means engageable one behind the other with support beams in the housing windows whereby the chocks are supported by said beams with the processing rolls in fixed spaced-apart relation as the rolls are together withdrawn from and introduced'into the housings.
  • a four-high rolling mill comprises a pair of spaced-apart housings each of which defines a window receiving the bearing chock assemblies carried at one end of each of a pair of processing rolls and the be:. ing chock assemblies carried at one end of each of a pair of backup rolls, means for raising andlowering the chocks of one of the backup rolls relative to the housings and one of the pair of chocks of the processing rolls in each window being positioned'in the other and each carrying means engageable one behind the other with support beams in the windows whereby the chocks of the processing rolls are supported by the beams with the processing rolls in fixed spaced-apart relation as the processing rolls are together withdrawn from and introduced into the housings.
  • the means carriedby the bearing chock assemblies of the processing rolls may be wheels, rollers or slides although wheels are preferred.
  • the provision of the wheels, rollers or slides enables the processing rolls to beseparated to fixed centers during the changing operation of the processing rolls.
  • An advantage of the processing rolls being separated tofixed centers is that the drive spindles for the processing rolls can be parked at a fixed position thereby facilitating the. coupling connection between the new pair of processing rolls and their respective drive spindles.
  • a further advantage lies in the fact that when the processing rolls have been withdrawn, as a pair, from the housings the upper processing roll and its bearing chock assemblies can be lifted vertically by means of a crane or jacks away from the lower work roll chock assemblies.
  • FIG. I is a side elevation, partly in section, of part of a fourhigh rolling mill in accordance with one embodiment of the invention.
  • FIG. 2 is a side elevation, partly in section, of part of a fourhigh rolling mill in accordance with a second embodiment of the invention
  • FIG. 3 is a perspective view of the bearing chock assemblies for the processing rolls of the mills shown in FIGS. 1 and 2,
  • FIG. 4 is a side elevation of the chocks shownin FIG. 3, and
  • FIG. 5 is an end elevation of the chocks shown in FIGS. 3 and 4.
  • FIGS. 1 and 2 the bearing chock assemblies at one end of each of the rolls of a four-high rolling mill are shown in the window defined by a rigid housing. It will be appreciated that the other end of each of the rolls will be provided with similar bearing chock assemblies mounted in the window defined by a second rigid housing.
  • the upper and lower chock assemblies l2, 13 there are arranged the bearing chock assemblies 14, 15 of the upper and lower processing rolls I6, 17 respectively.
  • the lower chockassembly 15 is nested in the upper chock assembly 14 and the construction of these chocks will be described .in more detail later.
  • Thechocks 14, 15 are provided with slide surfaces l8, 19 respectively which facilitate the relative vertical movement of each chock with respect to the other.
  • eachassembly can comprise two doubleacting pistons or two single-acting pistons with a spring return.
  • each assembly includes bore 35 in the block 21, 22, two double-acting pistons 36, 37 projecting from the bore and means (not shown) mounted on the housing for supplyingfluid underv pressure to'the bore between the two pistons and to spaces 42 between piston rings 43' on the pistons and the ends of the bore 35.
  • the upper chock 14 has a recess 50 in its lower face in which, is positioned the lower chock 15;
  • the lower chock is provided with a. pair of members in the form of wings 51 positioned on opposite sides of the chock and the wings project outwardly of the chock 14 through a pair of openings 52 in the opposite sidewalls of the chock 1 4.
  • the wings 51 lie adjacent a pair of similar wings 53 provided on opposite sides of the chock 14.
  • the wings 51 on the lower chock are disposed vertically below further wings 54 on the upper chock and the pistons-36, 37, act between the wings 54 and 51.
  • Each of the wings 53 carries means in the form of a wheel 55 by which the chock may be supported on a support beam and a further wheel 56is carried on each of the wings 51.
  • the wheels 55 and 56 are aligned one behind the other andare positioned above a pair of support beams 57, 58 (FIG. 1) in the housing window.
  • the wheels of the top chock are positioned slightly. above the wheels of the bottom chock so that when both sets of wheels are supported on the support beams the top roll is positioned in fixed spaced-apart relation relative to the bottom roll.
  • the support beam are stationary and are formed by depending portions of the blocks 21 and 22.
  • the lower backup roll chocks 13 are movable vertically with respect to'the housings by roll adjustment means which may take the form of a pair of hydraulic piston cylinder arrangements 60 located one in each of the housing windows.
  • the cylinders bear against the housings-and the pistons act against the underside of the lower backup chocks.
  • arrangement employing screws or wedges may be provided.
  • the lower backup roll chocks are lowered by the roll-adjusting means and this permits the chocks of the lower processing roll to be lowered until the wheels 56 engage the support beams 57, 58. On releasing the pistons 36 the.
  • the replacement rolls are introduced as a pair onto the beams 57, 58 and rolled into the housings.
  • FIG. 2 differs from that shown in FIG. 1 in that the lower backup roll chocks 13 are fixed in the housings and the support beams, one of which is indicated by reference numeral 59, can be raised and lowered in the housings.
  • the chocks of the upper backup roll are supported by a beam-type balance system or by hydraulic piston and cylinder devices whereby the top backup roll can be raised and lowered relative to the housings.
  • the upper backup roll is lifted out of engagement with the upper processing roll and the support beams are lifted as for example by piston cylinder arrangements 61 until they engage and support the wheels on the processing roll chocks with the lower processing roll clear of the lower backup roll.
  • the processing rolls and their chocks are then withdrawn longitudinally from the housings whilst supported on the beams.
  • a rolling mill comprising a pair of spaced-apart housing each of which defines a window, a pair of processing rolls each having bearing chock assemblies at its ends, the assemblies at one pair of adjacent ends of the rolls received in the window in one housing and the assemblies at the other pair of adjacent ends received in the window of the other housing, one of the pair of chocks of the processing rolls in each window being positioned in the other chock and each chock-carrying support means engageable with beams in the windows and means for causing relative vertical movement between the support means and the beams, said means being operative to disengage the support means from the beams during rolling and to engage said beams, with the support means on the chocks in each housing positioned one behind the other during roll changing.
  • a four-high rolling mill comprising a pair of spaced-apart housings each of which defines a window a pair of processing rolls each having bearing chock assemblies at its ends, a pair of backup rolls each having bearing chock assemblies at its ends, the bearing chock assemblies being received in said windows, one of the pair of chock assemblies of the processing rolls in each window being positioned in the other chock assembly and each chock assembly of the processing rolls carrying support means engageable with beams in the windows and means for causing relative vertical movement between the support means and the beams, said means being operative to disengage the support means form the beams during rolling and to engage said beams with the support means on the chocks in each housing positioned one behind the other during roll changing.
  • a rolling mill as claimed in claim I in which in each window one processing roll chock assembly defines a recess in I one face thereof and the other processing roll chock assembly is located in that recess.
  • a rolling mill as claimed in claim 2 in which in each window one processing roll chock assemblydefines a recess in one face thereof and the other processing roll chock assembly is located in that recess.
  • a rolling mill as claimed in claim 4 in which the processing ,roll chock assembly positioned in the recess has a pair of members projecting outwardly of the recess and carrying said support means engageable with the support beams.
  • a rolling mill as claimed in claim 5 in which said members project outwardly of the chock defining the recess through openings inthe sidewalls of the chock.
  • a rolling mill as claimed in claim 2 in which the chock assemblies of the lower backup roll are displaceable vertically with respect to the housings, means are provided for displacing said chock assemblies, and the beams are fixed in the housing windows.
  • a rolling mill as claimed in claim 9 in which the means for displacing said chock assemblies comprise hydraulic piston cylinder assemblies positioned between the housings and the lower backup roll chock assemblies.
  • a rolling mill as claimed ll'l claim 9 in which extensible means carried by the housings are provided, which means serve to urge processing rolls into engagement with their respective backup roll when the mill is in use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US847322A 1968-08-09 1969-08-04 Rolling mills Expired - Lifetime US3593554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38054/68A GB1248927A (en) 1968-08-09 1968-08-09 Rolling mills

Publications (1)

Publication Number Publication Date
US3593554A true US3593554A (en) 1971-07-20

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Application Number Title Priority Date Filing Date
US847322A Expired - Lifetime US3593554A (en) 1968-08-09 1969-08-04 Rolling mills

Country Status (4)

Country Link
US (1) US3593554A (de)
DE (1) DE1940414C3 (de)
FR (1) FR2015386A1 (de)
GB (1) GB1248927A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699796A (en) * 1970-11-30 1972-10-24 Blaw Knox Co Work roll changers
US3754426A (en) * 1971-02-25 1973-08-28 Wean United Inc Roll changing arrangement for a rolling mill
US3861189A (en) * 1972-11-09 1975-01-21 Krupp Gmbh Four-high mill frame structure
US4898014A (en) * 1988-12-23 1990-02-06 United Engineering, Inc. Roll shifting system for rolling mills
US20100071433A1 (en) * 2006-11-29 2010-03-25 Michael Bohland Roll stand

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3674781D1 (de) * 1986-03-04 1990-11-08 Mannesmann Ag Walzgeruest.

Citations (3)

* 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
US3446050A (en) * 1965-12-06 1969-05-27 United Eng Foundry Co Rolling mills
US3501936A (en) * 1965-11-15 1970-03-24 Davy & United Eng Co Ltd Rolling mills

Patent Citations (3)

* 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
US3501936A (en) * 1965-11-15 1970-03-24 Davy & United Eng Co Ltd Rolling mills
US3446050A (en) * 1965-12-06 1969-05-27 United Eng Foundry Co Rolling mills

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699796A (en) * 1970-11-30 1972-10-24 Blaw Knox Co Work roll changers
US3754426A (en) * 1971-02-25 1973-08-28 Wean United Inc Roll changing arrangement for a rolling mill
US3861189A (en) * 1972-11-09 1975-01-21 Krupp Gmbh Four-high mill frame structure
US4898014A (en) * 1988-12-23 1990-02-06 United Engineering, Inc. Roll shifting system for rolling mills
US20100071433A1 (en) * 2006-11-29 2010-03-25 Michael Bohland Roll stand
US8302446B2 (en) 2006-11-29 2012-11-06 Sms Siemag Ag Roll stand

Also Published As

Publication number Publication date
DE1940414A1 (de) 1970-02-12
GB1248927A (en) 1971-10-06
DE1940414B2 (de) 1978-04-13
FR2015386A1 (de) 1970-04-24
DE1940414C3 (de) 1979-11-29

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