US3882710A - Roll stand - Google Patents

Roll stand Download PDF

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Publication number
US3882710A
US3882710A US486606A US48660674A US3882710A US 3882710 A US3882710 A US 3882710A US 486606 A US486606 A US 486606A US 48660674 A US48660674 A US 48660674A US 3882710 A US3882710 A US 3882710A
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US
United States
Prior art keywords
cross
roll
cross beam
screwdown
cylinder
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
US486606A
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English (en)
Inventor
Emil Friedrich Kersting
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.)
Maschinenfabrik Sack GmbH
Original Assignee
Maschinenfabrik Sack 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 Maschinenfabrik Sack GmbH filed Critical Maschinenfabrik Sack GmbH
Application granted granted Critical
Publication of US3882710A publication Critical patent/US3882710A/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
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • 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

  • a roll stand has two lateral frames which are spaced apart and each of which has a window opening.
  • a plurality of rolls extends between the lateral frames and each roll is journalled adjacent its opposite ends in chocks received in the window openings.
  • a screwdown cross beam extends between the lateral frames at a location between the top of each frame and the uppermost roll.
  • a screw-down mechanism is associated with each frame and comprises a nut fixedly mounted on the cross beam.
  • a thrust member in screw threaded engagement with said nut and a drive mechanism mounted on said cross beam for imparting a rotary motion to said thrust member while permitting movement thereof relative to said nut.
  • the cross beam in the screwed-down condition is thus braced against the upper part of the frame via the thrust members.
  • the invention relates to screwdown gear for rolling mills with closed housings forming windows for the roller installation members and with a screwdown crossbeam following the screwdown movements of the adjusting screws, which cross-beam may be inserted in the windows between the upper cross-bars of the housings and the installation members of the upper rollers.
  • a screwdown cross-beam of this type has the purpose either of facilitating the installation of rollers of varying surface length, without having to move the housings (DT-PS 607 741), or of serving as a support member, following the screwdown movements, for the power cylinder of a roll camber control device (DT-OS l 527 739).
  • a screwdown cross-beam of this type is used for another purpose. It was based on the consideration that the normal construction of a roll stand, comprising two closed housings and adjusting screws in the upper cross-bars of the housings for adjusting the upper roller, has certain drawbacks, connected with the weakening of the crosssections of the upper cross-bars of the housings by the adjusting screws passing therethrough. This weakening of the cross-section is normally made up for by an accumulation of material on the upper cross-bars in the region of the adjusting screws. Nevertheless, it is very difficult to adapt the bending behaviour of theupper cross-bars to that of the lower cross-bars of the housings.
  • a further drawback consists in that for the insertion of the screw-threaded nuts in the upper cross-bars, the housings, which under certain circumstances are very heavy, have to be machined on a correspondingly heavy machine tool having a high cost per hour. Not only must bores be provided, but also flat bearing surfaces for the attachments of the screwdown gear, namely for the screwdown gearing and the screwdown motors. Also, the expenditure for preparatory work, for example for marking the heavy cast parts is not inconsiderable. Even if the housings are produced in a split construction, the machining of the upper cross-bars must take place when the housings are assembled.
  • the hydraulic regulating cylinders together with their feed pipes may be supported by the screwdown cross-beam.
  • the screwdown cross-beam rests directly on the installation components of the upper roller, i.e. the adjusting screws are supported on the upper cross-bars of the housings, or whether, vice versa, the screwdown cross-beam rests directly on the cross-bars.
  • the roll stand is to be equipped with a camber control device for the upper adjustable roller, whereby the screwdown crossbeam is constructed to be resistant to bending as known per se and hydraulic power cylinders are fixed to the extended ends, which power cylinders are connected to auxiliary bearings for controlling the camber of the upper roller, located on the extended roll journals of the upper roll, then it is advisable for the screwdown cross-beam to rest directly on the installation components.
  • the regulating cylinders of an automatic roll gap regulator are then located between the adjusting screws and the cross-bars of the housings. Due to this, the known advantage is achieved that both during actuation of the mechanical screwdown gear for a coarse adjustment and during roll gap corrections by the automatic roll gap regulator, the hydraulic power cylinders of the camber control device follow the movements of the upper roller and the pre-set counter bending force remains unchanged. Also, the screwdown cross-beam may be removed more easily from the windows of the housings, when it rests directly on the installation components of the upper roller by a continuous lower bearing surface.
  • the regulating cylinders are interconnected by a common connecting plate guided in the windows, on which connecting plate the pressure medium feed pipes and if necessary, also hydraulic pressure converters are located.
  • the hydraulic control elements of the automatic roll gap regulator may be largely located on the connecting plate with the result that these parts requiring maintenance are also detachable together with the screwdown cross-beam.
  • FIG. 1 shows the upper part of a four-high roll stand
  • FIG. 2 is a section on line llll of FIG. 1 and P16. 3 shows a detail.
  • the illustrated four-high roll stand comprises two housings 2, in the assembled position, whereof the vertical housing posts are interconnected by upper crossbars 2a.
  • the housing, cross-bars 2a are interconnected by a bridge 3.
  • an upper backing roll 4 and an upper working roll 5 are shown.
  • the back ing roll 4 is mounted in installation components 6, which are guided in the windows 7 formed by the housings 2.
  • a screwdown cross-beam 8 Located between the installation components 6 and the upper cross-bars 2a of the housings 2 is a screwdown cross-beam 8 passing through the windows 7 and guided therein, which cross-beam is supported by way of knife-edge bearings 9 on the installation components 6 of the upper roller 4.
  • the screwdown cross-beam 8 supports non-rotary threaded nuts 10 for screwdown adjusting screws 11 (FIG. 2), which are inserted by their ends facing the cross-bars 2a inworm gears 12 such that they cannotrotate but are able to slide.
  • the worm gears 12 may be driven by worms 13, which are in turn driven laterally by a screwdown motor 14.
  • the screwdown cross-beam 8 thus supports the mechanical screwdown gear for both sides of the housing, in order to adjust the upper set of rolls 4, 5 to the desired roll gap with respect to the lower set of rolls (not shown). if, in fact, the worm gear 12 is rotated, depending on the direction of rotation, the adjusting screws 11 travel either upwards out of the screwdown cross-beam or vice versa, due to which the spacing of the installation component 6 of the upper roller 4 from the cross-bars 2a of the housings 2 is determined.
  • the arrangement of the adjusting screws 11 inside the screwdown cross-beam 8 has the result that the cross-bars 2a of the housings are no longer weakened by the previously required threaded bores for the adjusting screws and may have cross-sections undergoing equal bending both at the top and bottom.
  • the illustrated roll stand is also provided with hydraulic screwdown gear for an automatic roll gap regulation.
  • two pressure plates 16 and 17, centered one in the other, are placed on each upper end face 11a of the adjusting screws 11, whereof the'upper pressure plate 17 respectively forms the means for centering the piston 18 of the regulating cylinder 20.
  • Each regulating piston 20 is supported by means of a pressure plate 21 on the housing side, against a cross-bar 2a. According to the regulating pressure pre-set by the regulating piston 18, the pistons 18 carry out their regulating stroke inside the regulating cylinder 20, due to which a roll gap correction is undertaken by way of the adjusting screws 11, the threaded nuts 10 and thescrewdown cross-beam 8.
  • the regulating cylinders 20 are interconnected by a common connecting plate 22 guided vertically in the window 7, which plate 22, is provided with bores 23 at the spacing A of the two adjusting screws 11, according to FIG. 3.
  • the regulating pistons 18 are inserted in these bores 23 by a stepped end, which is reduced in diameter, to slide in a limited manner by the regulating stroke provided, because in the vicinity ofthe bores 23, the connecting plate 22 is screwed to the underneath 20, as shown in FIG. 2.
  • the pressure chamber 24a for example of the j pressure converter 24, opens at its outlet directly into the channel 26 of the associated regulating cylinder 20,, I
  • the two converters 24, 25 overlapping partly alon g their length and located one beside the otheruon the 1 1 f connecting 1 plate 22, serve, in the present case, in 1 known manner, for changing over a regulating pressure produced by pressure oil to grease as the lastpressure medium in the regulating cylinders 20.
  • the screwdown cross-beam 8 is constructed to be re. 7 sistant to bending if the stand is intended t'ojbeprovided with a so-called camber control devicefor at] f least the upper backing roll 4, as shown in FIG. 1.
  • the backing roll 4 is then provided with eio i tended journal ends 4a, on each of which is located an q auxiliary bearing 30mm a tie-rod 31., which Jiscon nected by way of a bifurcation which is not shown, to 1 a cross-beam 32 resting on theextended ends 8a of the screwdown cross-beam 8.
  • Bending cylinders 33i ini serted in the screwdown cross-beam 8 act on thecrossr n beams such that the tie-rods 31 are pulledupwards and I thus counter-bending is forced on the upper backing roll 4 by way of the auxiliary bearing 30.
  • the tie-rods 31 are detachably connected to the cross-beam132,.in
  • a roll stand comprising two lateral frames arranged in spaced parallel relationship; a window opening in each frame; a plurality of chocks in said window openings; a plurality of rolls extending between said lateral frames and journalled in said Chocks; a laterally re-- movable screwdown cross-beam extending between 1 said lateral frames and through said1window'openings braced against the upper part of the frame by means of said thrust members.
  • each cylinder has a bottom opening, each piston has a reroll.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
US486606A 1973-07-06 1974-07-08 Roll stand Expired - Lifetime US3882710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2334442A DE2334442B2 (de) 1973-07-06 1973-07-06 Anstellvorrichtung für Walzwerke mit geschlossenen Ständern

Publications (1)

Publication Number Publication Date
US3882710A true US3882710A (en) 1975-05-13

Family

ID=5886147

Family Applications (1)

Application Number Title Priority Date Filing Date
US486606A Expired - Lifetime US3882710A (en) 1973-07-06 1974-07-08 Roll stand

Country Status (11)

Country Link
US (1) US3882710A (sv)
JP (1) JPS5739846B2 (sv)
AT (1) AT330706B (sv)
BE (1) BE817287A (sv)
DD (1) DD112913A5 (sv)
DE (1) DE2334442B2 (sv)
FR (1) FR2324384A1 (sv)
GB (1) GB1423924A (sv)
IT (1) IT1017024B (sv)
SE (1) SE408860B (sv)
SU (1) SU524497A3 (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551273A (en) * 1994-09-30 1996-09-03 Pomini S.P.A. Rolling stand with tie-rods with extremely high strength to axial stresses
WO1997027011A1 (en) * 1996-01-23 1997-07-31 Tippins Incorporated Rolling mill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3912303C2 (de) * 1989-04-14 1994-08-04 Troester Maschf Paul Kalander für die Herstellung von Dichtungsplatten

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212314A (en) * 1961-10-20 1965-10-19 United Eng Foundry Co Beam and plate rolling mill
US3364715A (en) * 1964-07-08 1968-01-23 United Eng Foundry Co Crown control for rolling mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS489634U (sv) * 1971-06-17 1973-02-02

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212314A (en) * 1961-10-20 1965-10-19 United Eng Foundry Co Beam and plate rolling mill
US3364715A (en) * 1964-07-08 1968-01-23 United Eng Foundry Co Crown control for rolling mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551273A (en) * 1994-09-30 1996-09-03 Pomini S.P.A. Rolling stand with tie-rods with extremely high strength to axial stresses
WO1997027011A1 (en) * 1996-01-23 1997-07-31 Tippins Incorporated Rolling mill
US5666845A (en) * 1996-01-23 1997-09-16 Tippins Incorporated Rolling mill

Also Published As

Publication number Publication date
AT330706B (de) 1976-07-12
FR2324384B1 (sv) 1979-02-16
SE408860B (sv) 1979-07-16
JPS5739846B2 (sv) 1982-08-24
DE2334442B2 (de) 1976-01-08
IT1017024B (it) 1977-07-20
SE7408618L (sv) 1975-01-07
JPS5049150A (sv) 1975-05-01
FR2324384A1 (fr) 1977-04-15
GB1423924A (en) 1976-02-04
BE817287A (fr) 1974-11-04
SU524497A3 (ru) 1976-08-05
DE2334442A1 (de) 1975-01-16
DD112913A5 (sv) 1975-05-12
ATA556174A (de) 1975-10-15

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