EP0142577A1 - Antriebsvorrichtung einer Rollenrichtmaschine - Google Patents

Antriebsvorrichtung einer Rollenrichtmaschine Download PDF

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Publication number
EP0142577A1
EP0142577A1 EP83111678A EP83111678A EP0142577A1 EP 0142577 A1 EP0142577 A1 EP 0142577A1 EP 83111678 A EP83111678 A EP 83111678A EP 83111678 A EP83111678 A EP 83111678A EP 0142577 A1 EP0142577 A1 EP 0142577A1
Authority
EP
European Patent Office
Prior art keywords
torque
driving
rolls
roller leveler
shafts
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Withdrawn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
EP83111678A
Other languages
English (en)
French (fr)
Inventor
Yoshimi c/o Nippon Steel Corporation Toriyama
Hiroshi c/o Nippon Steel Corporation Miyakawa
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to EP83111678A priority Critical patent/EP0142577A1/de
Publication of EP0142577A1 publication Critical patent/EP0142577A1/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Withdrawn legal-status Critical Current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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • This invention relates to an apparatus for driving a roller leveler that levels such steel plates, especially heavier-gage ones than those which develop excess unbending reactive force and torque during leveling.
  • the hot roller leveler for use in the continuous in-line quality control cooling process must have:
  • Fig. 1 shows an example of a roller leveler driving apparatus of the conventional type which essentially comprises a drive motor 1,' speed reducer 2, distributor 3 and spindle (not shown).
  • the rotation produced by the drive motor 1 is reduced by the reduction gears 4 in the speed reducer 2 and then transmitted to five intermediate shafts 6 via large distribution gears 5.
  • the rotation is further transmitted to thirteen driving shafts 8 via small distribution gears 7 in the distributor 3.
  • the power from the motor 1 is transmitted to each pair of top and bottom leveling rolls (not shown) through a spindle (not shown) coupled to each of the driving shafts 8.
  • the object of this invention is to provide an apparatus for driving a roller leveler that permits steel plates to be leveled safely and smoothly, avoiding the development of excess torque that might lead to the fracture of the drive unit.
  • a torque-limiting coupling is attached to all, or all but one, output shafts to which the motion of a single driving unit is transmitted in an apparatus for driving a roller leveler which comprises a plurality of bottom straightening rolls that are disposed at intervals below the pass line of the piece and top straightening rolls that are disposed, zigzagged with respect to the bottom rolls, above the same pass line.
  • the apparatus sends the piece forward while flattening by driving the bottom and top rolls simultaneously.
  • the torque control coupling absorbs the energy generated by it, so no torque greater than the predetermined level is transmitted to the driving unit. Also, conversely, even if the output of the driving unit works concentratedly on a single intermediate or distribution shaft, the torque transmitted is kept to the predetermined level.
  • Figs. 2 and 3 briefly show the mechanism by which the friction torque is produced.
  • the plate 11 is bent by the i-th leveling roll 10 arid gets curved to a radius R i at a point of contact with the roll. Since the center of curvature O can be an instantaneous one, the relationship between the velocity V . of the neutral plane in the direction of plate thickness and the peripheral velocity V o of the roll can be expressed as follows, if the peripheral velocity V is constant and, in addition, equal to the surface velocity of the plate or, in other words, if no slippage occurs between the surface of the plate and the roll:
  • Equation (1) or the aforesaid condi-. tions do not hold. Then, slippage occurs between the plate and rolls in order to reduce the roll-to-roll speed difference as the neutral plane velocity V i of the plate 11 should essentially be constant.
  • the re- a sult is the creation of/frictional force, as shown in Fig. 3.
  • P a , P b and P c designate the reactive forces that are developed against the leveling action on the rolls 10a, 10b and 10c, ⁇ the coefficient of kinetic friction, fa and f c the frictional forces. If the roll radius is r, then the frictional torques T a and T c can be expressed as follows:
  • Equations (2) and (3) show that the friction torque is proportional to the reactive force against the leveling action.
  • the reactive force varies from roll to roll as it increases with an increase in the amount of pressing.
  • equation (1) therefore, a group of rolls that provide heavier pressing cause the plate to move forward at a higher speed, thus producing a greater friction torque. Consequently, such a group of rolls tend to rotate other group or groups of rolls that provide lighter pressing (and, therefore, impart lower travelling speed and develop smaller reactive force). Therefore, a/ positive friction torque develops on the group of rolls providing heavier pressing whereby the plate is caused to move forward through the rolls while a being flattened, whereas/negative friction torque develops on the group of rolls providing lighter pressing whereby the rolls are rotated by the motion of the plate.
  • the driving apparatus of the roller leveler is designed to drive groups of rolls through a mechanical coupling, positive and negative torques are exchanged among the individual groups. Being much greater than the flattening torque that is derived from an ordinary theoretical equation, the friction torque often causes the fracture of a spindle and other troubles. Even if the driving force for each roll is varied in advance depending on the roll-diameter, the development of the friction torque cannot be avoided since it arises if the amount of pressing and/or roll diameter varies, even slightly, from roll to roll. Providing a separate driving apparatus to each roll is also virtually meaningless because the friction torque develops in each unit. The foregoing may be summarized as follows:
  • a friction torque can be caused also by other phenomena than those described above, such as:
  • This invention perfectly eliminates the likelihood of the roller leveler driving apparatus of getting damaged or broken by the excess friction torque deve- lopped between the plate and leveler rolls and permits the plate to be straightened safely and smoothly.
  • a roller leveler driving apparatus embodying the principle of this invention will be described in the following by reference to Fig. 4.
  • the arrangement and structure of a motor 1, speed reducer 2 and distributor 3 are identical to those shown in Fig. 1.
  • the driving method is of the mechanical coupling type whereby the rotation from the motor is transmitted to thirteen distribution shafts 8a through 8m by way of five intermediate shafts 6a through 6e.
  • Couplings 12 and a torque-limiting coupling 13 are attached to the distribution shafts 8a through 8m on the output side of the distributor 3.
  • the torque-limiting coupling is a generic name given to couplings such as hydraulic or friction clutch coupl- ingsthat keep substantially constant the torque that is transmitted from the driving side to the driven side, or in the opposite direction,
  • Fig. 5 is a cross section
  • the function of the torque-limiting coupling is to limit the amount of torque working on the individual distribution shafts 8a through 8m. Even if any excess friction torque is developed as a result of a slippage between the plate and roll, no torque greater than the predetermined one is transmitted to the driving unit. Even if, conversely, the power of the motor 1 works concentratedly on only one intermediate or distribution shaft, no torque greater than the predetermined one is allowed to develop. While the positive and negative friction torques are being eliminated, such an amount of torque as is necessary for flattening is transmitted through the torque-limiting coupling to ensure a smooth leveling operation.
  • the roller leveler With all excess torque reduced to the predetermined level, the roller leveler is now able to perform its leveling function stably freed from the excess- torque-induced breakage of its driving unit or other troubles.
  • the torque-limiting coupling may be equipped with a mechanism to vary, either stepwise or continuously, the level of the torque transmitted therethrough.
  • one torque-limiting coupling 13 is attached to all distribution shafts 8a through 8m. Or otherwise, as shown in Fig. 6, an independent motor may be provided to each roll, with a torque-limiting coupling 13 attached to all or all but one distribution shafts in each driving unit.
  • the driving apparatus according to this invention is suited for use with roller levelers that flatten steel plates and other plate-formed products, especially those products which develop excess reactive force and torque during leveling.
  • the driving apparatus of this invention can be used not only with hot roller levelers but also with all kinds of roller levelers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP83111678A 1983-11-22 1983-11-22 Antriebsvorrichtung einer Rollenrichtmaschine Withdrawn EP0142577A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83111678A EP0142577A1 (de) 1983-11-22 1983-11-22 Antriebsvorrichtung einer Rollenrichtmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83111678A EP0142577A1 (de) 1983-11-22 1983-11-22 Antriebsvorrichtung einer Rollenrichtmaschine

Publications (1)

Publication Number Publication Date
EP0142577A1 true EP0142577A1 (de) 1985-05-29

Family

ID=8190823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111678A Withdrawn EP0142577A1 (de) 1983-11-22 1983-11-22 Antriebsvorrichtung einer Rollenrichtmaschine

Country Status (1)

Country Link
EP (1) EP0142577A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584384A1 (de) * 2004-04-07 2005-10-12 Sundwig GmbH Richtmaschine mit Wechselkassette
EP2058059A1 (de) * 2007-11-07 2009-05-13 The Bradbury Company, Inc. Verfahren und Vorrichtung zum Antreiben von Materialbearbeitungsmaschinen
EP2116315B2 (de) † 2008-05-08 2013-03-13 Arku Maschinenbau Gmbh Walzenrichtmaschine mit Kassettenwechselsystem
ITMI20130229A1 (it) * 2013-02-19 2014-08-20 I Spianatrice a rulli per lamiere e procedimento per spianare con essa una lamiera
US9050638B2 (en) 2010-10-06 2015-06-09 The Bradbury Company, Inc. Apparatus and methods to increase the efficiency of roll-forming and leveling systems
CN110762168A (zh) * 2018-07-27 2020-02-07 江苏泰隆减速机股份有限公司 一种矫直机用减速机
CN118357309A (zh) * 2024-06-19 2024-07-19 中南大学 一种高筋壁板局部矫直装置及矫直方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1522634A (fr) * 1967-03-28 1968-04-26 Wtz Feikeramischen Ind Commande pour laminoirs et décintreuses à galets
FR1599475A (de) * 1968-12-27 1970-07-15
GB1230860A (de) * 1968-12-23 1971-05-05
DE2103892A1 (en) * 1971-01-28 1972-08-24 Schloemann AG, 4000 Düsseldorf Sheet metal straightening - partic cold plate by a reverse bending method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1522634A (fr) * 1967-03-28 1968-04-26 Wtz Feikeramischen Ind Commande pour laminoirs et décintreuses à galets
GB1230860A (de) * 1968-12-23 1971-05-05
FR1599475A (de) * 1968-12-27 1970-07-15
DE2103892A1 (en) * 1971-01-28 1972-08-24 Schloemann AG, 4000 Düsseldorf Sheet metal straightening - partic cold plate by a reverse bending method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584384A1 (de) * 2004-04-07 2005-10-12 Sundwig GmbH Richtmaschine mit Wechselkassette
US8893537B2 (en) 2007-11-07 2014-11-25 The Bradbury Company, Inc. Methods and apparatus to drive material conditioning machines
EP2058059A1 (de) * 2007-11-07 2009-05-13 The Bradbury Company, Inc. Verfahren und Vorrichtung zum Antreiben von Materialbearbeitungsmaschinen
US10537923B2 (en) 2007-11-07 2020-01-21 The Bradbury Company, Inc. Methods to drive material conditioning machines
EP2116315B2 (de) † 2008-05-08 2013-03-13 Arku Maschinenbau Gmbh Walzenrichtmaschine mit Kassettenwechselsystem
US10252306B2 (en) 2010-10-06 2019-04-09 The Bradbury Company, Inc. Apparatus and methods to increase the efficiency of roll-forming and leveling systems
US9050638B2 (en) 2010-10-06 2015-06-09 The Bradbury Company, Inc. Apparatus and methods to increase the efficiency of roll-forming and leveling systems
US11045850B2 (en) 2010-10-06 2021-06-29 The Bradbury Company, Inc. Apparatus and methods to increase the efficiency of roll-forming and leveling systems
US9901967B2 (en) 2013-02-19 2018-02-27 F.I.M.I.—Fabbrica Impianti Macchine Industriali—S.P.A. Roll leveller for metal sheets and a process for levelling a metal sheet with it
EP2958688B1 (de) 2013-02-19 2018-04-04 F.I.M.I. - Fabbrica Impianti Machine Industriali - S.p.A. Rollenrichtanlage für bleche und verfahren zum nivellieren eines blech damit
WO2014128614A1 (en) * 2013-02-19 2014-08-28 F.I.M.I. - Fabbrica Impianti Macchine Industriali - S.P.A. Roll leveller for metal sheets and a process for levelling a metal sheet with it
ITMI20130229A1 (it) * 2013-02-19 2014-08-20 I Spianatrice a rulli per lamiere e procedimento per spianare con essa una lamiera
CN110762168A (zh) * 2018-07-27 2020-02-07 江苏泰隆减速机股份有限公司 一种矫直机用减速机
CN118357309A (zh) * 2024-06-19 2024-07-19 中南大学 一种高筋壁板局部矫直装置及矫直方法

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Inventor name: MIYAKAWA, HIROSHIC/O NIPPON STEEL CORPORATION

Inventor name: TORIYAMA, YOSHIMIC/O NIPPON STEEL CORPORATION