US3740982A - Temperature and shape control system for rolling mill rolls - Google Patents

Temperature and shape control system for rolling mill rolls Download PDF

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Publication number
US3740982A
US3740982A US00195684A US3740982DA US3740982A US 3740982 A US3740982 A US 3740982A US 00195684 A US00195684 A US 00195684A US 3740982D A US3740982D A US 3740982DA US 3740982 A US3740982 A US 3740982A
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United States
Prior art keywords
roll
fluid
rolls
bearings
temperature
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Expired - Lifetime
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US00195684A
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English (en)
Inventor
R Hacker
Coy W Mc
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Timken Co
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Timken Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/08—Lubricating, cooling or heating rolls internally
    • 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
    • B21B31/07—Adaptation of roll neck bearings
    • B21B31/076—Cooling; Lubricating roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

Definitions

  • ABSTRACT A temperature and shape control system for rolling mill rolls operable to extract heat or add heat to the roll ends of the back-up rolls to produce and maintain a heat balance and temperature gradient across the width of the roll bodies to maintain the desired roll shape for determining and improving the flatness of the product being produced in the rolling mill.
  • Still another object of the present invention is to provide the improvements heretofore stated and to combine therewith means to control the heat balance and temperature gradient across the rolling mill rolls by modulating the flow of the heat transfer fluid.
  • FIG. 1 is a somewhat schematic end elevational side view of a rolling mill having work rolls and back-up rolls arranged in a generally conventional manner and wherein portions of the presently improved temperature and shape control system may be seen;
  • FIG. 2 is a fragmentary and partial sectional elevational view of the rolling mill taken at line 2-2 of FIG. I particularly showing the means by which the temperature of the back-up roll necks may be controlled in accordance with this invention;
  • FIG. 3 is a fragmentary and greatly enlarged sectional view along the line 3-3 in FIG. 1 to show details of a roll neck and bearing support therefor with a typical temperature and shape control system;
  • FIG. 4 is a fragmentary end elevational view of a back-up roll chock provided with a modified temperature and shape control system, the view being typical of both back-up rolls of the rolling mill shown in FIG.
  • FIG. 5 is a fragmentary sectional view taken at line 5-5 in FIG. 4'.
  • FIG. 6 is a fragmentary view of means to control the fluid circulating valves, such as the character of means shown in FIGS. 1 and 2.
  • FIGS. 1 and 2 of the drawings there is shown a preferred rolling mill arrangement which comprises a typical four-high rolling mill stand having the usual pair of mill housings, one of which is seen at 10.
  • the mill is used to roll flat strip materials S. Since there are a pair of housings for each stand, it is understood that the description of one housing will apply equally to the other.
  • the mill housing 10 supports the necks of a pair of work rolls 11 and 12 and a pair of back-up rolls l3 and 14. Work roll 11 is backed up by roll 13 and work roll 12 is backed up by roll 14.
  • the work rolls l1 and 12 are suitably mounted in chocks l5 and 16 respectively, and the back-up rolls are slidably mounted in chocks 17 and 18 so as to be vertically adjustable for back-up roll and for work roll diameter variations.
  • the adjustable chock 17 supports the backup roll 13 and the embodiment shown enables both the work roll 11 and its back-up roll 13 to be moved simultaneously relative to the work roll 12 and its back-up roll 14 for thickness control of the strip being rolled.
  • the work roll 12 has its chock 16 suitably mounted in the supporting chock 18 for the back-up roll 14, and in this case the chock 18 is rested in the mill housing 10 on a suitable bearing plate 19.
  • the means for adjusting the work rolls 11 and 12 is generally shown at the adjusting screw 20 operatively mounted in the upper end of the mill housing 10 and connected'in a suitable manner to the thrust bearing unit 21 engaged on the upper end of the chock 17 for the upper back-up roll 13 and work roll 11.
  • the upper back-up roll 13 is typically provided with roll necks 13a, each of which is operatively mounted in a four row tapered roller bearing 22 engaged between the roll neck 13a and the chock 17 in mill housings 10.
  • the back-up roll 14 is mounted in a similar manner at necks 14a so that the view of FIG. 3 will suffice for all of the roll neck mountings.
  • the initial set up for the mill is to have the work rolls 11 and 12 and the back-up rolls l3 and 14 cylindrical or with some preconceived special crown which will tend to counteract deformations imposed by normal rolling loads and thereby produce a flat strip.
  • the achievement sought is to maintain this initial setting by counteracting the effects of temperature and wear or to modify the initial setting if and when required to produce a flatter strip. It has been found that heat exchange fluid circulated in the back-up roll bearing areas will keep the initial desired shape of such rolls over substantially all mill operating conditions. The heat exchange fluid is circulated in such a way that a balance is obtained between the heat picked up from the work reduction and the heat picked up from the baring load reaction.
  • the temperature control fluid for the roll neck 13a is supplied through a swivel coupling 25 which receives the supply of control fluid which is directed by a conduit 26 at opposite sides of the stand axially through the roll neck 13a and into the inner end portion of bore 27 (FIG. 3) in the back-up roll 13.
  • the tube 26 penetrates the axial bore 27 and is smaller in diameter so as to provide an annular passage 28 for the fluid return flow outside of an enclosing sleeve 29 to isolate the return fluid in the annular passage 28 from the supply fluid within the tube 26.
  • the return fluid is conducted away through conduit 30 which is associated with or as a part of the fitting 25.
  • FIG. 1 a combined complete system is disclosed, with some portions shown in schematic outline.
  • the showing includes a roll neck recirculating system where the fluid is moved by a pump 31 through a filter 31A into branch conduits 32 at each side, and the fluid flows out through the T-fittings.
  • One such T-fitting 33 (FIG. 1) conducts the fluid into a fitting 25 of the character shown in FIG. 3.
  • the return flow is conducted by lines 30 to a return conduit 34 at T-fittings 35, and from conduit 34 the fluid flows to a heat exchanger unit 37, and thence to the pump 31 for recirculation.
  • the return fluid flow to conduit 34 from each fitting 25 is controlled by a suitable valve 38 which is modulated under the control response of temperature measuring thermocouple probes 39 mounted in the chocks 17 and 18 (FIG. 2) adjacent he roll neck bearings 22 so as to be responsive to the temperature at these hearings.
  • part of the combined system includes a system where the fluid from conduit 32 flows from T-flttings 40 to conduits 41 respectively connected to jacket spaces 42 in the chocks l7 and 18. From the jacket spaces 42 the fluid is conducted by cross-over passages 43 to jacket spaces 44 at the opposite sides of the roll neck bearings 22 where the fluid exits at conduits 45 to the return conduit 34 through individual flow regulating valves 36 to T-fittings 47 in return line 34.
  • the valves 36 may be manually regulated, but in the view shown they are automatically controlled by means 48 responsive through lead 48 to the temperature at the thermocouple probes 39 used to control the valves 38 in the roll neck heat control system.
  • fluid is circulated into the roll necks 13a and through the chocks around the neck bearings 22 so that the temperature across the back-up rolls l3 and 14 is controlled to avoid roll distortion due to the heat of rolling the strip material S or heat from the hearings or seals, thereby assuring flatness and accuracy of the thickness of the strip material S.
  • a header manifold 50 receives the fluid flow at end 51.
  • the manifold is provided with a plurality of (4 being seen) outlet conduits 52 (FIG. 5) which extend axially into bores 53 in the chock 17 along side the roll neck bearings.
  • the conduits 52 are smaller than the bore so as to form an annular flow passage 54 which leads into the return housing 55 so that the fluid may flow out at nipple 56 and into the return manifold 57 for exit at the manifold outlet end 58.
  • the inlet end 51 of manifold 50 is adapted to be connected at T-fitting 40 by conduit 41 (FIG. 1) and the end 58 of the manifold 57 is connected to T-fitting 47 by conduit 45 (FIG. 1).
  • the assembly shown in FIG. 4 also includes the provision of fluid circulating means 60 and 61 adjacent the roll neck bearing but below and at each side of the axis of the roll neck at approximately 45 from each side of the vertical.
  • the devices at 60 and 61 are each made up in a manner similar to the assembly shown in FIG. 5 except that the fluid inlet taps 62 and 63 respectively are laterally and downwardly directed while the fluid discharge taps 64 and 65 come out of the fittings 50 and 51 respectively in an axial direction.
  • the modified flow distribution system is shown in connection with the upper back-up roll neck where the reaction transmitted into the back-up roll from the upper work roll is predominately vertically upwardly. Therefore, the fluid supply and exhaust manifold 50 and 57 are connected to distribute the temperature control fluid over the area of maximum load reaction because it is in this area where the bearing loads generate the greatest heat.
  • thermocouple means 39 The heat balance in each of the back-up roll necks 13a and 14a (FIGS. 1 and 2) is subject to the control effected by temperature sensing thermocouple means 39.
  • Each thermocouple means 39 is connected by a lead 49 into an electrical buss in the protective tube 66.
  • the lead 49 is, in each instance, electrically united with lead 49' which connects to a suitable control mechanism generally shown at 46.
  • the mechanism 46 is connected to the adjacent valve 38 so that the temperature in the roll neck can be regulated by flow of the heat transfer fluid through conduit 30.
  • the thermocouple 39 by measuring the temperature of a suitable place in the chock 17 and 18 modulates the mechanism 46 which opens or closes valve 38 in response tothe desired heat transfer to maintain accurate results in rolling the work strip S.
  • the general mechanism of 46 may be a Leeds and Northrup series 10260 drive mechanism for an electric valve controller which, in turn, may be a Leeds and Northrup Electromax III universal controller forapplications with thermocouples 39, or an equivalent. The
  • FIG. 1 there is shown a system for controlling the heat balance in the roll neck bearings as the load on the bearings contributes to the generation of heat.
  • the heat transfer fluid supplied from conduits 41 exits at conduits 45 to valves 36 and to the return conduit 34.
  • the valves 36 are each under the control of mechanism 48 which is similar to mechanism 46 described above.
  • the thermocouples 39 are electrically connected into the buss in tube 66, and a lead 48' extends therefrom for connection at mechanism 48. It is understood that when the thermocuples vary from a predetermined setting heat balance is ei ther retained by the closing of one or more of the valves 36 and 38, or by the opening of one or more of valves 36 and 38.
  • the valves 36 and 38 can be modulated between open and closed positions.
  • FIG. 6 there is shown an arrangement of components which constitute the mechanism of components 46 heretofore-described.
  • lead 49 and 49' from a thermocouple 39 is connected to the valve controller device VC that operates a prime mover PM connected by suitable links to the valve 38.
  • the valve 38 may control the flow of heat exchange fluid from line 30 to line 34 which leads back to the heat exchanger 37.
  • the devices VC and PM may be Leeds and Northrup components heretofore identified in the description of FIGS. 1 and 2.
  • the present system includes means whereby heat may be taken away from or added to the roll ends or necks to produce or maintain a desired heat balance and temperature gradient across the width of the roll, and therebymaintain the desired roll shape which determines the flatness of the product S being rolled. While the disclosure has shown the system applied only to the back-up rolls it is understood the same system is adapatable to the work rolls.
  • said circulating flow control means includes thermostatically controlled valve means adjacent each of said roll neck bearings, said valve means individually regulating the roll neck bearing heat rise in accordance with predetermined heat balance requirements of each'roll neck bearing.
  • said circulating flow control means includes temperature sensing means adjacent said roll neck bearings, valve means inserted in said fluid circulating system, and temperature controller means connected between said temperature sensing means and said valve means whereby the heat 'rise in said bearings is balanced across said work rolls.
  • said circulating flow control means includes thermostatically controlled valve means adjacent each of said roll neck bearings.
  • a roll shape and temperature control system for said back-up rolls comprising, fluid flow passage forming means in said roll necks, separate fluid flow passage forming means surrounding said bearings supporting said roll necks, conduits connected to both said passage forming means to supply fluid to and receive fluid from said passage forming means, heat exchange means connected to said fluid supply and receiving conduit means, pump means disposed in said system to cause fluid flow, heat responsive means in the framework carrying said'bearings, and valve means in said fluid receiving conduit connections, said valve means being connected to said heat responsive means and operated thereby to modulate the fluid flow in both said fluid flow passage forming means and cause said back-up -rolls to operate at a predetermined temperature and shape in response to the temperature conditions in said roll necks and supporting bearings.
  • control means including fluid flow means connected into each roll neck to circulate fluid internally of each roll neck, fluid conducting jackets externally adjacent said roll necks and bearings, conduits connected to said internal flow means and to said external jackets, heat transfer fluid contained in said conduits, pump means operative to circulate said fluid through said conduits and jackets, heat exchanger means connected into said conduits and pump means, temperature measuring means adjacnet said roll neck bearing supporting means responsive to temperature at said bearing means, and valve means responsive to said temperature measuring means to modulate said fluid circulation selectively to add and withdraw heat at said roll necks.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Metal Rolling (AREA)
US00195684A 1971-11-04 1971-11-04 Temperature and shape control system for rolling mill rolls Expired - Lifetime US3740982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19568471A 1971-11-04 1971-11-04

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US3740982A true US3740982A (en) 1973-06-26

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US00195684A Expired - Lifetime US3740982A (en) 1971-11-04 1971-11-04 Temperature and shape control system for rolling mill rolls

Country Status (8)

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US (1) US3740982A (fr)
JP (1) JPS5010829B2 (fr)
AU (1) AU451158B2 (fr)
BE (1) BE787636A (fr)
CA (1) CA957878A (fr)
DE (1) DE2240204A1 (fr)
GB (1) GB1404663A (fr)
IT (1) IT961979B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6523383B2 (en) 2000-12-28 2003-02-25 The Timken Company Monitoring and controlling system with connectorless quick-change components
US6568459B2 (en) * 1999-07-16 2003-05-27 Mannesmann Ag Process and apparatus for casting a continuous metal strand
US20110154877A1 (en) * 2008-02-19 2011-06-30 Michael Breuer Roll stand, particularly push roll stand
US20120128279A1 (en) * 2009-07-30 2012-05-24 The Timken Company Method and apparatus for setting rolling element bearings in rolling mills
WO2015142733A1 (fr) * 2014-03-20 2015-09-24 The Timken Company Cylindre de laminage avec arbre central creux pour faire circuler un fluide et procédé de commande de réglage de palier dans celui-ci
CN105327943A (zh) * 2015-12-04 2016-02-17 重庆麦拓科技有限公司 底座和轧机
CN112969540A (zh) * 2018-11-23 2021-06-15 考克利尔维修工程有限责任公司 灵活冷轧机及其转换方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5916608A (ja) * 1982-07-20 1984-01-27 Kobe Steel Ltd 圧延機における形状制御方法
JPS6153002U (fr) * 1984-09-11 1986-04-10
AT407497B (de) * 1997-12-04 2001-03-26 Voest Alpine Ind Anlagen Walzgerüst
CN112974534A (zh) * 2021-02-22 2021-06-18 莱芜钢铁集团银山型钢有限公司 热轧带钢卷取机卷筒对带钢头部的张力控制方法和系统

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6568459B2 (en) * 1999-07-16 2003-05-27 Mannesmann Ag Process and apparatus for casting a continuous metal strand
US6523383B2 (en) 2000-12-28 2003-02-25 The Timken Company Monitoring and controlling system with connectorless quick-change components
US20110154877A1 (en) * 2008-02-19 2011-06-30 Michael Breuer Roll stand, particularly push roll stand
US9770745B2 (en) * 2008-02-19 2017-09-26 Sms Siemag Ag Roll stand, particularly push roll stand
US20120128279A1 (en) * 2009-07-30 2012-05-24 The Timken Company Method and apparatus for setting rolling element bearings in rolling mills
US8757890B2 (en) * 2009-07-30 2014-06-24 The Timken Company Method and apparatus for setting rolling element bearings in rolling mills
WO2015142733A1 (fr) * 2014-03-20 2015-09-24 The Timken Company Cylindre de laminage avec arbre central creux pour faire circuler un fluide et procédé de commande de réglage de palier dans celui-ci
CN105327943A (zh) * 2015-12-04 2016-02-17 重庆麦拓科技有限公司 底座和轧机
CN112969540A (zh) * 2018-11-23 2021-06-15 考克利尔维修工程有限责任公司 灵活冷轧机及其转换方法
US11400497B2 (en) * 2018-11-23 2022-08-02 Cockerill Maintenance & Ingenierie S.A. Flexible cold rolling mill and method for converting the same
CN112969540B (zh) * 2018-11-23 2023-11-03 考克利尔维修工程有限责任公司 灵活冷轧机及其转换方法

Also Published As

Publication number Publication date
BE787636A (fr) 1973-02-19
DE2240204A1 (de) 1973-05-10
AU451158B2 (en) 1974-08-01
CA957878A (en) 1974-11-19
JPS5010829B2 (fr) 1975-04-24
IT961979B (it) 1973-12-10
AU4502372A (en) 1974-01-31
GB1404663A (en) 1975-09-03
JPS4853955A (fr) 1973-07-28

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