US3828600A - Roll stand - Google Patents

Roll stand Download PDF

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Publication number
US3828600A
US3828600A US00368575A US36857573A US3828600A US 3828600 A US3828600 A US 3828600A US 00368575 A US00368575 A US 00368575A US 36857573 A US36857573 A US 36857573A US 3828600 A US3828600 A US 3828600A
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US
United States
Prior art keywords
roll
idle
rotation
stand
rolls
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
US00368575A
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English (en)
Inventor
O Kukushkin
V Krivobokov
G Pobegailo
V Nashivanko
G Borisenko
J Chernobrivenko
J Kutsov
A Gorbaney
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Individual
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Individual
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 Individual filed Critical Individual
Priority to US00368575A priority Critical patent/US3828600A/en
Priority to DE2330334A priority patent/DE2330334C3/de
Application granted granted Critical
Publication of US3828600A publication Critical patent/US3828600A/en
Priority to FR7431537A priority patent/FR2285194A1/fr
Priority to GB4319974A priority patent/GB1457850A/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
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/10—Driving arrangements for rolls which have only a low-power drive; Driving arrangements for rolls which receive power from the shaft of another roll
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • Pushkina ; Grigory Gavrilovich Pobegailo, pereulok Uritskogo, l l, kv. 3;- Vitaly Dmitrievich Nashivanko, ulitsa G. Pushkina, lb, kv. 57, all of Dnepropetrovsk, U.S.S.R.
  • the roll stand comprises a frame with pads housing one drive working roll connected to a drive and adapted to deform a bar being rolled, and idle rolls connected to drives to be accelerated and to synchronize the rates of rotation thereof with that of the drive working roll.
  • the drives designed to accelerate and synchronize idle rolls are fashioned as combined flange-type non-contact electric motors having armatures which are mounted on the axles of idle rolls, and the stator windings are mounted in the pads of the roll stand, the stator windings of the drives being connected to ac. supply sources.
  • the present invention has as its objective to increase the speed of rolling of the stand and decrease of its over-all dimensions and weight.
  • the present invention relates generally to metal rolling and more particularly, it relates to roll stands of a block-structure mill for rolling solid and hollow metal bars.
  • each pair of the rolls in the stands of a mill is disposed at an angle of 90 relative to the pair of the rolls of the adjacent stand.
  • the rolls are rotated by an electric motor through a transmission reduction gear andan intermediate transmission.
  • the pair of the rolls is rotated through a system of rack hyperbolic gears.
  • the above double-roll stand mounted on the body of the main reduction gear is, just alike the working stand, of no independent significance, and should be considered alongside with the design of the reduction gear of the main drive adapted to simultaneously transfer torque to a number of analogous stands assembled into a block.
  • the conventional double-roller stand has the following disadvantages.
  • the design of the reduction gear of the main drive of the stand is extremely intricate, it has a great weight and requires employment of high grades of manufacture precision, which raises the production costs of certain units of the stand by several times.
  • a double-roll stand is also known having rolls which are rotated by a controlled electric motor through a common reduction gear reduction gears specially provided for each stand, aligned with gear stands and disposed along the frame of the block of stands, and drive spindles equipped with Hook's joints.
  • the main disadvantage of the stand lies in the complex design of the main drive.
  • the bulky equipment to be found in the main drive of the stand considerably enlarges the over-all dimensions of the block of stands and its weight.
  • a design of a three-roll roll stand is also known in the art having one input shaft and internal distribution of rotation with the aid of bevel gearings, and used mainly for rolling bars made from carbon and low-alloy steel.
  • the minimal diameter of rolls of such stands is 250 mm, and the maximal rate of bar rolling in such stands is 45 m/sec.
  • a design of a three-roll roll stand which has a powerful drive connected to only one working roller and two idle rolls.
  • a design of a three-roll roll stand is known in the art having a powerful drive connected to only one roll and a special auxiliary drive for the other two rolls that are rigidly mechanically engaged neither with the drive roll, nor with each other.
  • the special auxiliary drive of the two rolls is essentially boxes stationary mounted on the frame pads having wheels of small turbines seated on axles insidethereof. A jet of liquid is thrown at a high speed from a nozzle mounted on the box body in the direction tangential to the turbine wheel, and rotates the latter (cf. U.S. Pat. No. 3,611,777; CL. 72249, Oct. 1971).
  • a disadvantage of this design of the stand lies in that it has no members synchronizing the rates of rotation of the auxiliary rolls and the drive roll, which hampers 3 I operation of the roll stand and the block of stands of the rolling mill at high speed.
  • Another object of the present invention is to provide such a roll stand that will make it possible to decrease the over-all dimensions and weight of the stand equipment.
  • Still another object of the present invention is to provide a roll stand that will allow elimination of impact loads and vibration in the stand.
  • Yet another object of the present invention is to simplify the design of the stand and, consequently, to reduce the costs of the equipment maintenance.
  • roll stand of a blockstructure rolling mill for rolling solid and hollow metal bars comprising a frame with pads having bearing units mounted therein, supporting axles with a working roll and at least one idle roll, a drive for deforming a bar being rolled, the drive being connected to the working roll, and drives of idle rolls.
  • the roll stand of a block-structure mill adapted to roll solid and hollow metal bars comprises a frame with pads having bearing units mounted therein and carrying axles with a working roll and at least one idle rolls, a drive for deforming the bar being rolled, the drive being connected to the working roll,'and drives of idle rolls.
  • each of the drives of the idle rolls is made as a combined noncontact flange-type electric motor adapted to accelerate and synchronize the rates of rotation of the working roll and the idle roll, the armature of the electric motor being mounted on the axle of the idle roll, and the stator being essentially a winding built in the pad of the roll stand and disposed in the plane parallel to the plane of rotation of the roll, the stator windings of the drives being connected to an a.c. supply source.
  • stator winding it is no less important to mount the stator winding on the pad face that is external relative to the idle roll, and to install the armature on the end portion of the axle of the roll in opposition to the stator winding which will ensure a quicker adjustment of the gap between the surface of the stator winding and that of the armature due to presence of free access to controllable parts of the stand.
  • the idle rolls as hollow rolls housing the bearing units, and make the axles of the rolls non-rotatable, which will considerably simplify treatment of the frame of the stand and dynamic balancing of the roll.
  • a roll stand which allows to carry out the rolling process at a speed of m/sec and more, which considerably raises efficiency of the rolling mill; to decrease the over-all dimensions and weight of the stand equipment; todo away with impact loads and vibration in the stand; to simplify the design of the stand and, consequently, to reduce the costs of the equipment maintenance.
  • FIG. 1 shows a block-structure rolling mill for rolling metal bars, comprising a roll stand made in accordance with the present invention, a top view;
  • FIG. 2 shows a roll stand made in accordance with the present invention, in which the armature of a noncontact electric motor is mounted on the butt face of the idle roll, facing the butt face of the pad, mounting the stator winding, and the bearing units are disposed asymmetrically relative to the roll whose axle is made rotatable, a view taken along the axis of the rolling process, with partial extraction;
  • FIG. 3 shows a variant of embodiment of unit A in FIG. 2, in which the armature of a non-contact electric motor is mounted on the butt face of the hollow idle roll housing the bearing unit built therein, the axle of the roll being made not rotatable;
  • FIG. 4 shows a variant of embodiment of unit A in FIG. 2, in which the stator winding is disposed on the side of pad that is external relative to the idle roll, and the armature is mounted on the end portion of the axle of the roll, the axle being made rotatable.
  • the block-structure rolling mill comprises a general controllable electric drive 1 connected through a clutch 2 to a group reducing gear 3 of the mill, a frame 4 of a block of stands, mounting roll stands 5, output shafts 6 of the reducing gear and electric pick-ups of the rates of rotation of the output shafts 6 of the stands 5.
  • the pick-ups 7 are mounted on the shanks (not shown in the drawings) of the output shafts 6 of the reducing gear 3 at its side opposite to that on which the roll stands 5 are disposed.
  • the roll stand 5 (FIG. 2) according to the invention comprises a frame 8 with pads 9, 10 and 11 made integral therewith and accomodating a working roll 12 mounted on a drive shaft 13 and two similar idle rolls 14 and 15.
  • Each of the pads 9 and 10 of the idle rolls l4 and 15 has detachable universal stator units 16 mounted therein and accomodating stator windings 17 that are essentially printed ones.
  • the stator unit 16 has an annular cooling chamber 18 designed to cool down the stator winding 17 in the course of its operation.
  • the cooling chamber 18 has two holes 19 adapted to supply and drain the cooling liquid, one of the holes being shown in FIG. 2.
  • the stator unit 16 and the stator winding 17 are installed in the body of the pad 10, and are disposed in a plane parallel to the plane of rotation of the roll 15.
  • the idle roll 15 is mounted on a rotatable axle 20 resting on bearing units 21 and 22 which are disposed symmetrically relative to the idle roll, the bearing unit 21 being spaced at the side of the stator unit 16 from the roll 15 over a greater distance than the bearing unit 22.
  • the difference in the distances is determined mainly by the width of the stator unit 16.
  • armature casing 23 Mounted on the butt face of the idle roll 15, facing the butt face of the pad 10 mounting the stator winding 17 is a casing 23 of the armature, the casing 23 having the armature 24 mounted therein.
  • the armature casing 23 is secured to the body of the roll 15 with the aid of several screws 25.
  • a duct 26 along which dried compressed air is supplied, the latter, on getting into an annular duct 27 formed by the surface of the axle 20 and the inner surface of the round hole of the stator unit 16, and a gap 28 formed by the surface of the stator winding 17 and the surface of the armature casing 23 cooling down the butt face of the stator winding 17.
  • a shaft 29 of an electric pick-up 30 measuring the rate of rotation of the idle roll 15, the pick-up being cut in an electric circuit (not shown in the drawing) synchronizing the rates of rotation of the roll 15 and the working roll 12 rotated by the output shaft 6 of the reducing gear and the drive shaft 13 carrying the working roll 12.
  • the second idle roll 14 mounts a similar pick-up 31 adapted to measure its rate of rotation and also cut in an electric circuit (not shown in the drawing) synchronizing the rates of rotation of the rolls l2 and 14.
  • stator windings 17 connected to an ac. supply source (not shown in the drawing) are used as the stator windings allows for decreasing the over-all dimensions of the stator unit 16 installed in the pad 10 of the roll stand 5, which, in its turn, makes it possible to decrease the dimensions of the pad and, consequently, that of the roll stand as a whole.
  • use of printed stator windings instead of windings made from wire considerably simplifies electric insulation of the winding, to raise by several times its resistance to water, and to protect it reliably against water, scale, oil and mechanical damage.
  • the variant of embodiment of the roll stand with unit A shown in FIG. 3 has some specific features which make it a little different from the viewpoint of its design from the roll stand as shown in FIG. 2, the difference residing in the following.
  • the bearing units 21 and 22 are substituted by one bearing unit 34, mounted inside the hollow roll 32.
  • the design of the armature casing 23 is different too, and it now serves also as a cover 35 of the bearing unit 34, secured to the butt face of the rotatable hollow roll 32 with the aid of screws 36.
  • Mounted at the opposite side of the bearing unit 34 on the butt face of the rotatable roll 32 is a second cover 37 of the unit, the cover 37 being fixed with the help of screws 38.
  • the design of the roll stand in which the hollow rolls 32 having the bearing units 54 mounted therein and the nonrotatable axles 33 are used as idle rolls is advantageous in the cases when bars having a low yield limit are rolled and high rigidity of the parts of unit A of the roll stand is not required. In this event it is much easier to treat the frame 8 of the roll stand and to effect dynamic balancing of the idle hollow rolls 32.
  • the stator unit 16 is mounted on the side of the pad 10, that is external relative to the idle roll 15, and the casing 23 of the armature is mounted on the end portion 43 of the axle 20, in opposition to the stator winding 17, and is fixed with the aid of a nut 44.
  • This disposition of the parts of unit A allows to quickly set up the gap 28 between the surface of the stator winding and the surface of the armature due to free access to the parts of the roll stand.
  • the armature casing 23 is mounted on the end portion 43 of the axle 20 of the idle roll instead of being installed in the body of the roll, it is possible to decrease the width of the rolls 12, 14 and 15 and to dispose the bearing units 21 and 22 symmetrically with respect to the roll 15.
  • the roll stand of this design is compact and has a higher rigidity, whereas the rotatable parts can be easily subjected to dynamic balancing.
  • the roll stand functions as follows.
  • the operator switches on the system cooling the stator windings 17 with the aid of the chambers 18 and the system cooling by compressed air the butt surface of the statorwinding 17 disposed in the annular gap 28.
  • the operator switches on the system cooling the stator windings 17 with the aid of the chambers 18 and the system cooling by compressed air the butt surface of the statorwinding 17 disposed in the annular gap 28.
  • each of the roll stands 5 is provided with additional synchronization of the rate of rotation of the rolls 14 and 15 with the rate of rotation of the roll 12.
  • each of the idle rolls l4 and 15 mounts the electric pick-ups 30 and 31 cut in the comparison circuit of the rates of rotation of the rolls and that of the working roll 12.
  • the electric signals are delivered to the control electric circuits of the supply sources and comparison circuits of the rates of rotation of the working roll 12 and is completed too, and the rolling mill is ready for operation.
  • metal bars are rolled in the mill in the direction as indicated by arrows in FIG. 1.
  • a great advantage of the roll stand of the present invention lies in considerable increase of the speed of rolling and, consequently, an increased efficiency of the rolling mill.
  • the design of the present roll stand allows the provision of rolling equipment exhibiting high dynamic characteristics and making it possible to roll bars of a small cross-section at high speeds m/sec and higher).
  • the roll stand of the block-structure rolling mill possesses widest technological possibilities, as compared to any other block-structure stands.
  • a roll stand of a block-structure mill for rolling solid and hollow metal bars said roll stand comprising a frame having pads; bearing units being mounted into said pads and carrying axles, said axles having a working roll and at least one idle roll; drive means for deforming a bar being rolled-and being connected to said working roll; drives of said idle rolls, said drives being adapted to accelerate them and to synchronize the rate of their rotation with that of said working roll, each of said drives being made as a combined non-contact electric motor having an armature which is mounted on the axle of said idle roll and a stator being formed essentially as a winding mounted in said pad of said roll stand and being disposed in a plane parallel to the plane of rotation of the roll; and a.c. supply sources being connected to said stator windings of said combined noncontact electric motor, providing for a rotating magnetic field between said stator windings and armatures, said magnetic field by interacting with said armature mounted in said idle roll rotating the latter.
  • stator windings are made as printed windings.
  • a roll stand of a block-structure mill for rolling solid and hollow metal bars comprising a frame having pads; a working roll and at least one idle roll being disposed between said pads; bearing units of said working roll mounted in said pads and carrying an axle with a working roll; said idle rolls being made hollow and accommodating one bearing unit in each, said bearing unit carrying a non-rotatable axle of the roll; drive means for deforming a bar being rolled and connected to said working roll; drives of said idle rolls being adapted to accelerate the latter and to synchronize the rates of their rotation with that of the working roll, each of said drives being fashioned as a combined non-contact electric motor having an armature which is mounted on the butt face of said hollow idle roll and a stator being essentially formed as a winding mounted in said pad of said roll stand and being disposed in a plane parallel to the plane of rotation of the roll; and a.c. supply sources being connected to said stator windings of said combined non-contact electric motor, providing between said stator windings and arma

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Manufacture Of Motors, Generators (AREA)
US00368575A 1973-06-11 1973-06-11 Roll stand Expired - Lifetime US3828600A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00368575A US3828600A (en) 1973-06-11 1973-06-11 Roll stand
DE2330334A DE2330334C3 (de) 1973-06-11 1973-06-14 Antriebseinrichtung für ein mit mindestens zwei Walzen pro Kaliber versehenes Walzwerk
FR7431537A FR2285194A1 (fr) 1973-06-11 1974-09-18 Cage de laminoir
GB4319974A GB1457850A (en) 1973-06-11 1974-10-04 Roll stand

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US00368575A US3828600A (en) 1973-06-11 1973-06-11 Roll stand
DE2330334A DE2330334C3 (de) 1973-06-11 1973-06-14 Antriebseinrichtung für ein mit mindestens zwei Walzen pro Kaliber versehenes Walzwerk
FR7431537A FR2285194A1 (fr) 1973-06-11 1974-09-18 Cage de laminoir
GB4319974A GB1457850A (en) 1973-06-11 1974-10-04 Roll stand

Publications (1)

Publication Number Publication Date
US3828600A true US3828600A (en) 1974-08-13

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US00368575A Expired - Lifetime US3828600A (en) 1973-06-11 1973-06-11 Roll stand

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Country Link
US (1) US3828600A (fr)
DE (1) DE2330334C3 (fr)
FR (1) FR2285194A1 (fr)
GB (1) GB1457850A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831858A (en) * 1987-01-30 1989-05-23 Fec Co., Ltd. Driving apparatus for vertical rolling mill
US4864838A (en) * 1986-08-14 1989-09-12 Sms Schloemann-Siemag Aktiengesellschaft Drive apparatus for the vertical rolls of a universal rolling mill stand
WO2018210473A1 (fr) * 2017-05-15 2018-11-22 Sms Group Gmbh Dispositif métallurgique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8624843D0 (en) * 1986-10-16 1986-11-19 Davy Mckee Sheffield Rolling mills

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611777A (en) * 1968-12-13 1971-10-12 Siemag Siegener Masch Bau Drive for rolling mill

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611777A (en) * 1968-12-13 1971-10-12 Siemag Siegener Masch Bau Drive for rolling mill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864838A (en) * 1986-08-14 1989-09-12 Sms Schloemann-Siemag Aktiengesellschaft Drive apparatus for the vertical rolls of a universal rolling mill stand
US4831858A (en) * 1987-01-30 1989-05-23 Fec Co., Ltd. Driving apparatus for vertical rolling mill
WO2018210473A1 (fr) * 2017-05-15 2018-11-22 Sms Group Gmbh Dispositif métallurgique
CN110636909A (zh) * 2017-05-15 2019-12-31 Sms集团有限公司 冶金设备
RU2735408C1 (ru) * 2017-05-15 2020-11-02 Смс Груп Гмбх Металлургическое устройство
US11638942B2 (en) 2017-05-15 2023-05-02 Sms Group Gmbh Metallurgical device with self-powered sensing

Also Published As

Publication number Publication date
DE2330334B2 (de) 1977-10-27
FR2285194B1 (fr) 1976-12-31
DE2330334A1 (de) 1975-02-06
FR2285194A1 (fr) 1976-04-16
GB1457850A (en) 1976-12-08
DE2330334C3 (de) 1978-06-15

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