US3695080A - System for the replacement of rolling-mill rolls - Google Patents

System for the replacement of rolling-mill rolls Download PDF

Info

Publication number
US3695080A
US3695080A US80666A US3695080DA US3695080A US 3695080 A US3695080 A US 3695080A US 80666 A US80666 A US 80666A US 3695080D A US3695080D A US 3695080DA US 3695080 A US3695080 A US 3695080A
Authority
US
United States
Prior art keywords
rolling
stand
rolls
mill
skid
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
US80666A
Other languages
English (en)
Inventor
Theodor Sevenich
Friedrich Zahn
Peter Zens
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.)
Maschinen und Werkzeugbau GmbH
Original Assignee
Masch & Werkzeugbau Gmbh
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 Masch & Werkzeugbau Gmbh filed Critical Masch & Werkzeugbau Gmbh
Application granted granted Critical
Publication of US3695080A publication Critical patent/US3695080A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21B31/08—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

  • ABSTRACT A pair of rolling-mill rolls, to be replaceably inserted in a rolling-mill stand, is mounted upon a skid carried parallel to the rolling direction and shiftable bodily in the horizontal transverse direction to carry the rolls into the stand.
  • the members of theskid are provided with hydraulic ducts connected to positioning cylinders on the lower roll for spacing the rolls apart.
  • PATENTEBHBH I972 sum a nr 2 INVENTORS, T. SEVENICH F. ZAHN BY P. ZENS .761, Tau
  • a rolling mill for billets, a blooms, bars and other elongated workpieces generally comprises a plurality of installations spaced along the rolling path, each including a rolling-mill stand and a pair of horizontal working rolls joumaled therein for squeezing the elongated workpiece between them.
  • Such mills are employed, for example, in the continuous rolling of strip, band and sheet stock from metal billets, blooms, ingots, bars and the like.
  • the rolling-mill stand also carries a pair of back-up rolls respectively engaging and tangent to the upper and lower working rolls and having axes of rotation coplanar therewith for supporting the working rolls against the bending pressures generated when a workpiece of larger thickness than the rolling gap is forced between the working rolls.
  • the working rolls may each be provided with a journal at its opposite ends which are held in the rolling-mill stand, support or frame and serves to enable the rolling-gap width to be adjusted to the thickness necessary for strip, band and sheet stock.
  • the adjusting means may include a hydraulic, jack or like piston-and-cylinder arrangement disposed between the journal blocks of the working rolls.
  • Such systems have generally provided a means for positioning one or more working rolls along a side of the rolling-mill stand, means for lifting the rolls therein and laterally shifting the rolls out of the stand, and means for feeding a fresh roll into the stand also in the lateral direction.
  • the rolling path is tangential to the working rolls and is horizontal while the rolls have horizontal axes parallel to one another (and to any back-up rolls) and parallel to the surface of the rolled body but running transversely to the rolling direction.
  • Each rolling-mill stand may be provided with an opening through which the lateral movement of the rolls isenabled.
  • a further object of the is the provision of an improved system for replacing the working rolls of a rolling mill for the production of continuous bands or strips of metal.
  • a system for replacing the working rolls of a rolling mill which comprises a skid carrying the working rolls and shiftable in a direction parallel to the rolling direction ahead of an opening provided in the rolling-mill stand and into which the working rolls are subsequently inserted.
  • the skid has an opening through which the lower roll rests upon its backing roll.
  • the apparatus for replacing the working rolls of a rolling mill and especially the working rolls of continuously operating strip or band rolling mills comprises a plate or platform displaceable by a suitable drive along the rolling path and parallel to the rolling direction ahead of the rolling stand which has a lateral opening in which pairs of working rolls can be accomodated. It has been found, surprisingly, that the disadvantages of the earlier systems enumerated above can be eliminated entirely if, upon this plate, the working rolls are carried by a slide which is shiftable bodily into the rolling-mill stand and can be inserted therein and withdrawn therefrom with a pair of working rolls in superposed relation.
  • the slide or skid may, according to this invention, cradle the lowermost working roll and' may be provided with means engageable with the insertion and retraction apparatus, i.e. a piston-and-cylinder arrangement reciprocal to withdraw the previous pair of working rolls out of the stand through the aforementioned opening or to insert a new pair of rolls through the opening once the first-mentioned pair has been removed.
  • the skid according to the instant invention, has a pair of longitudinally extending bars or runners along which the journal blocks of the lower working rolls rest, these journal blocks, in turn, carrying the journal blocks of the upper roll via hydraulic-jack means.
  • the skid is further provided with duct means connectable to a hydraulic or pneumatic network and communicating, in turn, with the fluid-responsive gap adjuster for the working rolls.
  • the gap adjuster may be hydraulic or pneumatic cylinders provided between the journal blocks of the lower rolls and the journal blocks of the upper rolls.
  • Still another feature of the present invention resides I in the provision of a snap-action, quick-release, ,highpressure coupling including a first coupling member upon the skid. and a mating coupling member upon the rolling-mill stand and interengageable automatically upon the insertion of the skid and. the working rolls carried' hereby into the stand through the opening.
  • the coupling may be of the male-female or plug-socket type and the mating members are axially aligned along an axis which is offset from but parallel to the axis of the rolls.
  • the skid is formed with a cross piece (between runners) which is engageable by the fluidresponsive feed assembly and is located at the ends of the working rolls remote from their drive extremities.
  • the drive extremities of the working rolls may, of course, be receivable in drive sockets of any conventional configuration. It has also been found to be desirable to provide the gap-adjusting means with a facility to relieve the pressure upon the working rolls when the latter is to be withdrawn from the manner previously described. For the most part, best results are obtained when the hydraulic connection is automatic as the slide or skid is inserted, the connection being made at the driving side of the stand.
  • the system of the present invention has numerous advantages aside from the fact that it enables the working rolls with the associated journal blocks and spacer arrangement to be removed rapidly from the rolling stand, to be inserted therein or to be replaced. Of greater significance is the reduction in the amount of manual labor which has hitherto been required for positioning, displacing and reconnecting the working rolls of a rolling mill for bands'and the like.
  • FIG. 1 is a vertical cross section taken generally transversely to the rolling direction of a rolling mill diagrammatically illustrating the invention.
  • FIG. 2 is anelevational view, drawn to an enlarged scale, of the replaceable rolling-roll assembly
  • FIG. 3 is a cross-sectional view taken along the line III III of FIG. 2; and v FIG. 4 is an elevational view of a skid for, use with the system of FIGS. 2 and 3.
  • FIG. 1 of the drawing there is shown a rolling mill, in part represented at l, which comprises the usual stand la within which back-up rolls lb and 1c are journaled in respective blocks 1d and 1e.
  • the stand la is provided with an opening 1f adapted to permit insertion andremoval of the working rolls 4 which fit into the gap 1g between the take-up rolls lb and 1c.
  • a platform 1h upon the stand 1a serves as a guide for the skid 7 12 carrying the working rolls into the installation.
  • the means for driving the rolls are, of course, conventional and need not be described here.
  • each of the rolls 4 may be formed with a fitting 4e having a noncircular tongue 4f receivable in a complementary socket of the drive means.
  • Each of the rolls 4 is, moreover, journaled in a block 3 serving to rotatably support the rolls relative to one another and to accommodate spacing means as well as the means for adjusting the rolling gap 43.
  • the rolls and installation illustrated in FIGS. 1 and 2 are those of a band or strip mill as already indicated.
  • each of the lower journal blocks 30 is provided with a pair of cylinders 3b accommodating hydraulic plungers 3: which project into and are received within recesses 3d formed in the upper bearing block.
  • hydraulic fluid is introduced into the cylinders 3b below the plungers 30, therefore, the pairs of bearing blocks 3, 3a are urged apart.
  • the cylinders are pressurized to hold the rolls. 4 apart. Since the workpiece forced through the gap 4g is thicker than the gap width, the compression of the workpiece will generate vertical forces which are transferred by the working rolls 4 to the respective back-up rolls 1b and 10.
  • a drive arrangement having one or more plates or platforms 2.
  • the platforms 2 preferably constitute the uppersurfaces of carriages 2a which may have a chassis 2b rotatably supporting wheels 2c received in a channel-shaped track 2d and upon a flat rolling surface 2e of a guideway 2f shown diagrammatically in FIG. 1.
  • the means for shifting the carriages along this guideway is represented diagrammatically at 2g and may be an electric or fluid motor.
  • the upper surface 2h of the platform 2 is coplanar with the surface 1h of the receiving table so that the working-roll assembly can be shifted into the installation 1 with ease.
  • the assembly 5 may comprise a piston-and-cylinder arrangement 5a of the telescoping type, the head 5b of which is provided with a downwardly open recess adapted to engage a hook-shaped formation 20 upon the skid as will be described in greater detail hereinafter.
  • the hydraulic cylinder arrangement 5a extends, therefore, itthrusts the working-roll assembly to the right (arrow A) through the opening lf in the stand la of the mill,
  • the head 5b is tilted upwardly to release the hook 20 and the cylinder is withdrawn.
  • an empty platform 2 is positioned ahead of the opening 1 f
  • the cylinder 5a is extended to permit the head 5b to engage the hook 20 of the skid of the assembly
  • the cylinder 5a is retracted to withdraw the skid and the working rolls 4 carried thereby onto the platform 2, and the hook 20 is released.
  • the cylinders 3b which are generically illustrated as spacer means at 14 in FIG. 2, are depressurized to bring the working rolls together and permit them to move out of the gap lg-between the back-up rolls with ease.
  • the skid or slide 6 carries both working rolls. More particularly, the skid is constituted as a frame or cradle for the lower rolls and the lower rolls, in turn, carry the upper roll.
  • the slide or skid 6 comprises a pair of longitudinal runners 7, the latter extending parallel to the axes of the working rolls 4 and in the direction in which the working rolls are shifted for introduction .into and removal from the mill.
  • the runners 7 lie in a horizontal plane but perpendicular to the'direction of rolling.
  • Each of the runners 7 is provided with a downwardly extending ridge 7a of narrow dimension for engagement with the platform 2 and the table 1h to reduce frictional retardation during insertion and withdrawal of the slide.
  • the leading edge 7b and the trailing edge 70 of the ridge is beveled to facilitate transition between platform 2 and table 1h upon move- I ment of the skid in either direction.
  • the runners 7 are I interconnected by traverses 8 such that a rectangular frame structure is provided. In FIG. 3 we show how the runners 7 are received within rectangular notches 3g of the bearing blocks 3a.
  • the frame 7, 8 is made up of hollow (tubular) profiles that are interconnected into a common duct work or space 9 forming part of the hydraulic system for pressurizing the cylinders 14.
  • the skid 6 is provided with at least one bore into which a right-angle high-pressure plug-type quick-release connector half 11 is threaded, the member being engageable in a complementary member not shown) in a stand (preferably on the driving side) of the rolling mill.
  • the high-pressure quick-release coupling 11 is made and disconnected automatically upon insertion of the skid and its withdrawal by the means 5.
  • the duct work 9 is further connected via bores 12 in slide 6 and connecting conduits 13 to the cylinders 14 of the bearing blocks 3.
  • a rolling-mill installation comprising:
  • a rolling-mill stand for the rolling of a workpiece in a rolling direction, said stand defining a receiving surface alongside the rolling path, said stand having a pair of spaced-apart backing rolls; a platform shiftable in said direction alongside said stand and having an upper surface substantially aligned with said receiving surface;
  • work-roller assembly receivable in said stand between said backing rolls and including a skid slidable along said surface and formed with an opening, a lower working roll carried by said skid, and an upper working roll carried by said lower working roll, at least one hydraulic duct in said skid, and means for connecting said duct into a hydraulic network, said lower working roll engaging its backing roll through said opening in said skid said up er and lower working rolls are each provided wit a pair of bearing blocks; means for shifting said assembly from said platform onto said receiving surface and into said stand; hydraulic cylinders in the bearing blocks of said lower working roll acting upon the bearing blocks of the upper working roll for establishing a gap between them; and
  • said means for connecting said duct to said network includes a high-pressure quick-release plugtype connector carried by said slide and automatically insertable into and releasable from a complementary connector on said stand upon displacement of said assembly into and out of said stand respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US80666A 1969-10-18 1970-10-14 System for the replacement of rolling-mill rolls Expired - Lifetime US3695080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691952646 DE1952646A1 (de) 1969-10-18 1969-10-18 Arbeitswalzenschlitten zum Ein- und Ausbau von zwei uebereinanderliegenden Arbeitswalzen in bzw. aus einem Walzgeruest

Publications (1)

Publication Number Publication Date
US3695080A true US3695080A (en) 1972-10-03

Family

ID=5748614

Family Applications (1)

Application Number Title Priority Date Filing Date
US80666A Expired - Lifetime US3695080A (en) 1969-10-18 1970-10-14 System for the replacement of rolling-mill rolls

Country Status (5)

Country Link
US (1) US3695080A (enExample)
BE (1) BE757269A (enExample)
DE (1) DE1952646A1 (enExample)
FR (1) FR2065111A5 (enExample)
GB (1) GB1320556A (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162626A (en) * 1978-05-03 1979-07-31 Wean United, Inc. Rolling mill
US20070200025A1 (en) * 2006-02-28 2007-08-30 Barner James W Apparatus and method for feeding a material web to a machine
US11565292B2 (en) 2015-09-24 2023-01-31 Sms Group Gmbh Roll stand and method for changing work rolls

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1385495A (en) * 1972-01-27 1975-02-26 British Steel Corp Rolling mills

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE575486C (de) * 1932-01-29 1933-04-28 Schloemann Akt Ges Walzenwechselgeruest
US2037210A (en) * 1934-12-18 1936-04-14 United Eng Foundry Co Roll changing apparatus
US3180125A (en) * 1962-08-15 1965-04-27 United Eng Foundry Co Roll changing apparatus
US3406552A (en) * 1966-01-06 1968-10-22 Bliss E W Co Remotely operated fluid coupling mechanism for a rolling mill or a similar device
US3433046A (en) * 1966-08-17 1969-03-18 Blaw Knox Co Roll changing mechanism for rolling mills
US3436945A (en) * 1967-02-21 1969-04-08 Textron Inc Roll-changing apparatus for a rolling mill
US3438234A (en) * 1966-02-15 1969-04-15 United Eng Foundry Co Roll changing device for rolling mills
US3446050A (en) * 1965-12-06 1969-05-27 United Eng Foundry Co Rolling mills
US3459023A (en) * 1966-04-05 1969-08-05 United Eng Foundry Co Rolling mill

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE575486C (de) * 1932-01-29 1933-04-28 Schloemann Akt Ges Walzenwechselgeruest
US2037210A (en) * 1934-12-18 1936-04-14 United Eng Foundry Co Roll changing apparatus
US3180125A (en) * 1962-08-15 1965-04-27 United Eng Foundry Co Roll changing apparatus
US3446050A (en) * 1965-12-06 1969-05-27 United Eng Foundry Co Rolling mills
US3406552A (en) * 1966-01-06 1968-10-22 Bliss E W Co Remotely operated fluid coupling mechanism for a rolling mill or a similar device
US3438234A (en) * 1966-02-15 1969-04-15 United Eng Foundry Co Roll changing device for rolling mills
US3459023A (en) * 1966-04-05 1969-08-05 United Eng Foundry Co Rolling mill
US3433046A (en) * 1966-08-17 1969-03-18 Blaw Knox Co Roll changing mechanism for rolling mills
US3436945A (en) * 1967-02-21 1969-04-08 Textron Inc Roll-changing apparatus for a rolling mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162626A (en) * 1978-05-03 1979-07-31 Wean United, Inc. Rolling mill
US20070200025A1 (en) * 2006-02-28 2007-08-30 Barner James W Apparatus and method for feeding a material web to a machine
US11565292B2 (en) 2015-09-24 2023-01-31 Sms Group Gmbh Roll stand and method for changing work rolls

Also Published As

Publication number Publication date
GB1320556A (en) 1973-06-13
FR2065111A5 (enExample) 1971-07-23
BE757269A (fr) 1971-03-16
DE1952646A1 (de) 1971-07-22

Similar Documents

Publication Publication Date Title
US3665746A (en) Combination rolling mill
EP0593709B1 (en) A rolling stand for generic rolling mills having three or more adjustable driven rolls
US6200245B1 (en) Apparatus and method for changing dies
US4763505A (en) Rolling mill stand with roll replaceability
KR100979424B1 (ko) 롤 스탠드에서 작업 롤 쌍 및/또는 지지 롤 쌍을 교체하는방법 및 장치
US3695080A (en) System for the replacement of rolling-mill rolls
EP0302254A1 (en) Rolling mill stand which can be converted into a four-high stand or universal stand
GB1421629A (en) Apparatus for dismantling and assembling roll assemblies of a rolling mill
US4631948A (en) Roll stand with braced and offset working rolls
US6672124B2 (en) Rolling mill train with staggered mills, especially as a tandem rolling installation
EP0281782A1 (de) Walzgerüst
CN104646429B (zh) 换辊装置
US3691809A (en) Mill roll changing arrangement
US3585831A (en) Rolling mill structure and roll changing means therefor
US3459023A (en) Rolling mill
US3877276A (en) Mill roll changing system including a cantilevered roll assembly
JP3241569B2 (ja) エッジング圧延機のガイド装置
NZ514693A (en) Strip casting apparatus
US3866455A (en) Mill roll changing system including a roll buggy
CN219192257U (zh) 轧辊转运车
US3443410A (en) Method of and apparatus for changing rolls in a rolling mill
US3436945A (en) Roll-changing apparatus for a rolling mill
HU176116B (en) Entering case for piercing rolls
AU708596B2 (en) Compact rolling block
US20040144150A1 (en) Device for disassembling rolling mill cylinders