EP1247592A2 - Walzwerk - Google Patents

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Publication number
EP1247592A2
EP1247592A2 EP02007095A EP02007095A EP1247592A2 EP 1247592 A2 EP1247592 A2 EP 1247592A2 EP 02007095 A EP02007095 A EP 02007095A EP 02007095 A EP02007095 A EP 02007095A EP 1247592 A2 EP1247592 A2 EP 1247592A2
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
rolling
joint means
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.)
Withdrawn
Application number
EP02007095A
Other languages
English (en)
French (fr)
Other versions
EP1247592A3 (de
Inventor
Yukio Ohno
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.)
Ohno Engineering Office GmbH
Original Assignee
Ohno Engineering Office 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 Ohno Engineering Office GmbH filed Critical Ohno Engineering Office GmbH
Publication of EP1247592A2 publication Critical patent/EP1247592A2/de
Publication of EP1247592A3 publication Critical patent/EP1247592A3/de
Withdrawn legal-status Critical Current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
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/06—Drives for metal-rolling mills, e.g. hydraulic drives for non-continuously-operating mills or for single stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B21B35/141—Rigid spindle couplings, e.g. coupling boxes placed on roll necks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands

Definitions

  • the present invention relates to a rolling mill for rolling a metal strip.
  • Figs. 1 and 2 show a conventional rolling mill 1 in which:
  • the conventional rolling mill 1 comprises a pair of upper and lower rolls 5 and 6 supported in a housing 2 through upper and lower journal boxes 3 and 4, respectively.
  • One of axial ends of the upper roll 5 has a wobbler (generally oval protrusion: Zapfen) 7 with a generally oval or partially chipped circular transverse section over which an upper coupling 9 with an coaxial connector 8 is fitted.
  • the upper coupling 9 is universally joined through the connector 8 to an upper spindle 10 which is universally jointed, at its end away from the connector 8, to a motor 11 which drives the upper roll 5.
  • One of axial ends of the lower roll 6 also has a wobbler 12 at the same side as that of the upper roll 5 and with a generally oval or partially chipped circular transverse section over which a lower coupling 14 with a coaxial connector 13 is similarly fitted.
  • the lower coupling 14 is also similarly jointed through a lower spindle 15 to a motor 16 which drives the lower roll 6.
  • an upper backup roll 17 Supported in the housing 2 and above the upper roll 5 through an upper journal box 18 is an upper backup roll 17 which suppresses bending of the upper roll 5. Supported in the housing 2 and below the lower roll 6 through a lower journal box 20 is a lower backup roll 19 which suppresses bending of the lower roll 6. Rails 21 extend from the housing and away from the motors 11 and 16. Arranged above the upper journal box 18 are screw down screws 22 which press axially opposite ends of the upper backup roll 17.
  • the motors 11 and 16 are driven to rotate the rolls 5 and 6 through the spindles 10 and 15 and couplings 9 and 14, respectively, thereby rolling the metal strip 23 passed between the rolls 5 and 6 into a predetermined thickness.
  • the rolls 5 and 6 are to be rearranged for inspection, exchange or the like after the rolling of the metal strip 23, the rolls 5 and 6 are dislodged for rearrangement by releasing the screw reduction of the backup rolls 17 and 19, disengaging the couplings 9 and 14 from the wobblers 7 and 12 of the rolls 5 and 6, respectively, and moving the rolls 5 and 6 together along the rails 21.
  • each of the couplings 9 and 14 has an inner space with a transverse section as shown in Fig. 2 which has a maximum diameter d1' and which is partially chipped circular for torque transmission, the inner space being smaller in transverse sectional area than a cylindrical inner space with diameter d1', leading to failure of fully exhibiting drive torque transmission ability inherently possessed by the diameter d1'.
  • a second disadvantage is that, because of the couplings 9 and 14 being vertically aligned, the outer diameter d2' of the couplings 9 and 14 is physically smaller than the diameter d of the rolls (d2' ⁇ d) so that the spindles 10 and 15 have always restricted rolling torque transmission ability.
  • the invention was made in view of the above and has its object to provide a rolling mill which can transmit increased rolling torque while a diameter of rolls being retained small.
  • one of axial ends of each of a pair of upper and lower rolls is provided with joint means, and motors for driving the paired rolls are arranged at opposite sides of the rolls, respectively, so that portions from the upper roll to the upper-roll driving motor are not interfered with portions from the lower roll to the lower-roll driving motor, which allows any connection of the axial end of the roll to the inner space of the joint means and allows any size of outer diameter of the joint means.
  • the connection of the axial end of the roll to the inner space of the joint means can be improved and the outer diameter of the joint means can be increased, leading to improvement of torque transmission ability so that greater rolling torque can be transmitted with the diameter of the rolls being retained small.
  • a wobbler of the roll to be connected to the joint means is not generally oval in transverse section but cylindrical or tapered so that a transverse sectional area of the inner space is made larger than that of oval, resulting in reliable transmission with no loss of torque transmission ability.
  • the coupling may be formed with hydraulic flow channels for introducing liquid under pressure to the inner space of the coupling so that introduction of the liquid under pressure causes the inner space to be expanded, whereby the connection of the axial end of the roll to the joint means can be readily released for rapid exchange of the roll and the like.
  • a rolling mill 25 comprises a pair of upper and lower rolls 29 and 30 supported in a housing 26 through upper and lower journal boxes 27 and 28, respectively.
  • One of axial ends of the upper roll 29 has a protrusion 31 which is cylindrical or tapered convergent towards a tip end.
  • Fitted over the protrusion 31 through press or shrinkage fitting is an upper adapter 34 of the joint means having a complementary inner space 32 with an inlet-side diameter d3.
  • the adapter 34 has a wobbler 33 with a generally oval or partially chipped circular transverse section with an outer diameter d1 over which an upper coupling 36 of the joint means with an outer diameter d2 and having a coaxial connector 35 is fitted so as to be easily releasable upon rearrangement of the roll.
  • the upper coupling 36 is universally jointed through the connector 35 to an upper spindle 37 which is universally joined, at its end away from the connector 35, with a motor 38 which drive the upper roll 29.
  • One of axial ends of the lower roll 30 away from the protrusion 31 of the upper roll 29 has a protrusion 40 which is cylindrical or tapered convergent towards a tip end.
  • Fitted over the protrusion 40 through press or shrinkage fitting is a lower adapter 43 of the joint means having a complementary inner space 41 with an inlet-side diameter d3.
  • the adapter 43 has a wobbler 42 with a generally oval or partially chipped circular transverse section with an outer diameter d1 over which a lower coupling 45 with an outer diameter d2 and having a coaxial connector 44 is fitted so as to be easily releasable upon rearrangement of the roll.
  • the lower coupling 45 is universally joined through the connector 44 to a lower spindle 46 which is universally joined, at its end away from the connector 44, with a motor 47 which drives the lower roll 30.
  • connection of the protrusions 31 and 40 of the rolls 29 and 30 to the adapters 34 and 43 through press or shrinkage fitting, respectively, is of a degree of strength such that torque transmission can be made by frictional force;
  • the relationship of the inlet-side diameter d3 of the adapters 34 and 43, the outer diameter d1 of the wobblers 33 and 42 of the adapters 34 and 43 and the outer diameter d2 of the couplings 36 and 45 is d2 > d1 > d3.
  • an upper backup roll 48 Supported in the housing 26 and above the upper roll 29 through an upper journal box 49 is an upper backup roll 48 which suppresses bending of the upper roll 29.
  • Balance beams or rails 50 extend from the housing 26 away from the upper-roll driving motor 38 (or towards the lower-roll driving motor 47).
  • Supported in the housing 26 and below the lower roll 30 through a lower journal box 52 is a lower backup roll 51 which suppresses bending of the lower roll 30.
  • Rails 53 extend from the housing and away from the lower-roll driving motor 47 (towards the upper-roll driving motor 38).
  • screw down screws 54 Arranged above the upper journal box 49 are screw down screws 54 for pressing axially opposite ends of the upper backup roll 48; arranged below the lower journal box 52 are automatic gauge control cylinders 55 which make fine adjustment of strip thickness.
  • the motor 38 When a metal strip 56 is to be rolled, the motor 38 is driven to rotate the roll 29 through the spindle 37, the coupling 36 and the adapter 34 while the motor 47 is driven to rotate the roll 30 through the spindle 46, the coupling 45 and the adapter 43, thereby rolling the metal strip 56 passed through the upper and lower rolls 29 and 30 into a predetermined thickness.
  • the rolls 29 and 30 are removed or dislodged from opposite sides of the rolls by releasing fitting of the wobblers 33 and 42 of the adapters 34 and 43 to the couplings 36 and 45, respectively, and moving the upper roll 29 and upper backup roll 48 together along the rails 50 and the lower roll 30 and the lower backup roll 51 together along the rails 53, respectively.
  • the upper and lower rolls 29 and 30 are life-expired, press or shrinkage fitting of the protrusions 31 and 40 of the rolls 29 and 30 to the adapters 34 and 43, respectively, is released for replacement of the rolls.
  • transverse sectional areas of the protrusions 31 and 40 in connection thereof to the adapters 34 and 43 and those of the wobblers 33 and 42 of the adapters 34 and 45 to the couplings 36 and 45 can be increased and the outer diameter d1 of the adapters 34 and 43 and outer diameter d2 of the couplings 36 and 45 can be made larger than the conventional outer diameters d1' and d2' shown in Fig. 2, thereby improving torque transmission ability and making it possible to transmit greater rolling torque while the diameter d of the rolls being kept small.
  • the transverse sectional area of each of the inner spaces 32 and 41 can be made grater than that of oval, resulting in reliable transmission with no loss of torque transmission ability.
  • Fig. 7 shows joint means in a rolling mill according to a further embodiment of the invention with the adapter 34 of the joint means according to the first embodiment being modified.
  • parts with the same reference numerals as those in Figs. 3 to 6 denote similar parts.
  • an adapter 60 fitted to the coupling 36 or 45 and having an inner space 61 tapered convergent toward its bottom is formed with a plurality of (four in Fig. 7) hydraulic flow channels 62.
  • the hydraulic flow channels 62 are communicated with a plurality of (four in Fig. 7) axially spaced annular grooves 63 on an inner periphery of the inner space 61 and have inflow ports 64 opened to an edge of the adapter 60.
  • Introduction means, for example manual hydraulic pump, (not shown) arranged outside can be detachably connected to the inflow ports 64.
  • the introduction means is connected to the inflow ports 64 to inject a high-pressure oil on an order or 1,000 atm so that the inner space 61 is expanded to allow the adapter 60 to be removed from the protrusion 31 or 40 of the roll 29 or 30.
  • the adapter 60 of the joint means is formed with hydraulic flow channels 62 which can introduce high-pressure oil.
  • Such introduction of the high-pressure oil into the inner space 61 causes the inner space 61 to be expanded, which allows easy disassembling and removal of the adapter 60 from the protrusion 31 or 40 of the roll 29 or 30 even if the former is shrinkage-fitted to the latter and is hard to release, resulting in easy exchange of the roll 29 or 30.
  • the second embodiment of the invention can attain similar effects and advantages as those of the first embodiment.
  • the joint means may be of any structure and of any shape.
  • construction is such that portions from the upper roll to the upper-roll driving motor are not interfered with portions from the lower roll to the lower-roll driving motor which allows any connection of the rolls to the inner spaces of joint means and any outer diameter of the joint means, so that connection of the rolls to the inner spaces of the joint means is improved and the outer diameter of the joint means is made larger, thereby improving torque transmission ability so that larger rolling torque can be transmitted with the diameter of the rolls being retained small.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP02007095A 2001-04-04 2002-03-28 Walzwerk Withdrawn EP1247592A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001106201 2001-04-04
JP2001106201A JP2002301508A (ja) 2001-04-04 2001-04-04 圧延機

Publications (2)

Publication Number Publication Date
EP1247592A2 true EP1247592A2 (de) 2002-10-09
EP1247592A3 EP1247592A3 (de) 2005-03-02

Family

ID=18958750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007095A Withdrawn EP1247592A3 (de) 2001-04-04 2002-03-28 Walzwerk

Country Status (2)

Country Link
EP (1) EP1247592A3 (de)
JP (1) JP2002301508A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20120178A1 (it) * 2012-10-24 2014-04-25 Pmp Ind S P A "stazione e impianto di laminazione"

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3330371B1 (ja) * 2002-03-12 2002-09-30 有限会社大野設計事務所 圧延機用ロール組替装置
JP2004306111A (ja) * 2003-04-09 2004-11-04 Ishikawajima Harima Heavy Ind Co Ltd 熱間圧延設備

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044280A (en) * 1960-01-30 1962-07-17 Tacke Kg F Articulated-joint toothed coupling
US3111823A (en) * 1960-10-11 1963-11-26 Wuppermann Gmbh Theodor Overload protection means between connected rotary members
JPS5930409A (ja) * 1982-08-10 1984-02-18 Ishikawajima Harima Heavy Ind Co Ltd 圧延機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20120178A1 (it) * 2012-10-24 2014-04-25 Pmp Ind S P A "stazione e impianto di laminazione"
WO2014063803A1 (en) * 2012-10-24 2014-05-01 Pmp Industries S.P.A. Rolling station and rolling mill plant
CN104884181A (zh) * 2012-10-24 2015-09-02 Pmp工业股份公司 轧制站和轧制厂
RU2662754C2 (ru) * 2012-10-24 2018-07-30 Пмп Индастриз С.П.А. Прокатная клеть и оборудование для прокатки

Also Published As

Publication number Publication date
JP2002301508A (ja) 2002-10-15
EP1247592A3 (de) 2005-03-02

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