EP0181828B1 - Dispositif d'entraînement en rotation des galets de travail d'une installation de laminoir planétaire de produits longs - Google Patents

Dispositif d'entraînement en rotation des galets de travail d'une installation de laminoir planétaire de produits longs Download PDF

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Publication number
EP0181828B1
EP0181828B1 EP85440064A EP85440064A EP0181828B1 EP 0181828 B1 EP0181828 B1 EP 0181828B1 EP 85440064 A EP85440064 A EP 85440064A EP 85440064 A EP85440064 A EP 85440064A EP 0181828 B1 EP0181828 B1 EP 0181828B1
Authority
EP
European Patent Office
Prior art keywords
axis
roll
ramp
rotor
rolling
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
Application number
EP85440064A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0181828A1 (fr
Inventor
Bernard Fazan
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT85440064T priority Critical patent/ATE44893T1/de
Publication of EP0181828A1 publication Critical patent/EP0181828A1/fr
Application granted granted Critical
Publication of EP0181828B1 publication Critical patent/EP0181828B1/fr
Expired 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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills

Definitions

  • the present invention relates to planetary rolling mill installations for rolling long metal products, in particular steel. It relates more specifically to the rotation drive of the grooved working rollers which equip the rotors of these installations.
  • a planetary rolling mill always consists, in principle, in the fact that the working rolls (or rollers) can not only rotate about their axis, but also move in space along a cylindrical trajectory which n is not necessarily revolutionary and which is not necessarily closed.
  • the planetary rolling plants considered here are those in which the rollers are provided with a rolling groove and are mounted in free rotation on their axes, which are parallel to one another and distributed at the periphery of rotors whose axis of rotation is itself parallel to those of the pebbles.
  • the rotors are grouped in pairs on either side of the product to be rolled.
  • a so-called "universal" planetary rolling mill is a processing tool specific to long products and which has at least two pairs of rotors, angularly offset around the product to be laminated in order to be able to laminate each of its faces.
  • rollers come periodically, over a portion of their orbit, called the working arc, into contact with the product to be rolled, the bottom of the groove laminating the edges of the product. They then suddenly acquire a high speed of rotation on themselves determined by the speed of the rotor which carries them and by the conditions of contact with the material to be laminated. We know that these sudden accelerations in the rotation of each roller during the first moments of contact with the product to be rolled can lead to slippage, and therefore to early wear of the rollers, as well as to subsequent defects on the surface of the rollers. products.
  • the object of the present invention is to apply a similar solution to the case of long products, while substantially improving it.
  • the subject of the invention is a device for driving in rotation the working rollers with a rolling groove of a planetary rolling mill installation for long products consisting of a ramp associated with each rotor, arranged outside thereof.
  • any point on the ramp's track is located at a distance from the axis of the rotor comprised between the distances to this axis from the bottom of the groove of the roller and of the point of contact between the roller and the product to be rolled furthest from the axis of the roller, and in that each roller has a bearing formed at at least one end of said roller and the lateral surface of which constitutes a strip by means of which the roller comes into contact with the raceway of said ramp.
  • pebbles have the general shape of a "diabolo".
  • the two conical parts are connected to their small base by a rounding forming the bottom of a groove which laminates the edges of the product and the sides laminate the sides of the product on either side of this edge (see for example the request EP-A 0 000 290 or patent No. FR-A 2 559 689).
  • the ramp it will be advantageous to arrange the ramp so that its running track is at a distance from the axis of the rotor close to, or even equal to, that of the half-depth of the groove.
  • the running track of the ramp and / or the journals are provided with a friction lining to alleviate the tendency of the roller to slip on the ramp.
  • the invention therefore consists, in its essential characteristics, of equipping a planetary rolling installation with long products with means intended to give the rollers a determined movement of rotation on themselves before they are brought into contact of the product to be laminated, the direction of this preliminary rotation being the same as that of the rotation on itself which the roller naturally acquires when it traverses its working arc.
  • the prior rotation speed of the rollers is not arbitrary, but adapted to that normally acquired during the abrupt phase of rotation of the rollers in the first moments of their coming into contact with the product.
  • the result sought by the invention is the elimination, or at least a strong attenuation, of the discontinuity of the rotational movement of a roller on itself which usually exists between the moment of its engagement on its working arc and the previous moments when it is free to rotate on its axis.
  • FIGs 1a and 1 illustrate the concept of "rolling radius” which will help to understand the foundations of the invention.
  • the "rolling radius” R is the internal radius of a fictitious ring 1, having as its axis the axis 2 of the rotor (not shown), and on which a fictitious rolled roller that 3, having the same axis as the axis 4 of the real roller 5 (represented on its working arc rolling a steel billet 6), would roll taking a rotational speed on itself ⁇ f , identical to the speed of true rotation ⁇ that the real roller 5 takes around its axis 4.
  • cylindrical bearings 11 are provided at the ends of the roller 5 having a circular strip 9, of the same axis 4 as the roller and of radius p which can be determined by the preceding relationship.
  • the roller comes to roll on the track 8 of the ramp 7 (by means of the band 9 of its end spans) where it already acquires the speed of rotation on itself that would normally impose contact with it - with the product to be laminated when it travels through its working arc TT '(fig. 3).
  • the radius p of the strip 9 is necessarily between the extreme radii of the roller grip, that is to say between the radius G of the groove bottom 13 laminating the edge of the product 6 and the radius F end points 14 of the blanks 15 of the groove laminating the sides of the product on either side of this edge.
  • the strip 9 is the outside face of a friction lining 12 constituted by a ring which is fitted to the end bearing surfaces 11.
  • This lining is made of a material, such as those used in friction clutches, that is to say having good friction properties ensuring a satisfactory drive.
  • a similar lining can of course also be provided to constitute the race track 8 of the ramp 7 and this separately or jointly with the ring 12 of the end bearings 11. Another advantage of the presence of such linings is to constitute bands easily replaceable.
  • the ramp 7 for putting the rollers in advance is interrupted in the vicinity of the rolled bar 6 so that the roller is free to take the speed of rotation ⁇ corresponding to the conditions of contact with the rolled metal without risk of skating.
  • the ramp can extend as far as desired around the rotor.
  • a ramp length of the order of 1 m is sufficient for obtaining the desired result and this with the usual range. rotational speeds imposed on the rotor. Of course, this length of 1 m can be further reduced if friction linings are used.
  • end bearings 11 of conical shape.
  • This in combination with a ramp, such as 7, no longer fixed in space, but adjustable in translation parallel to the axis 2 of the rotor and radially with respect to this axis, makes it possible to modify the rolling radius R, and therefore set the rotation speed ⁇ of the roller 5 on the ramp 7 to the desired value.
  • the means for fixing the ramp 7 must keep it in the same plane perpendicular to the axis 2 of the rotor while allowing it a slight tilting movement in this plane to take account of the fact that the envelope of the cross section of the conical bearing surface of the roller, contained in the plane of the ramp, is a circle whose radius varies with the lateral position of the ramp and cannot therefore remain constantly equal to the interior radius of the race track of the ramp.
  • the ramp fastening means may consist of springs or hydraulic or pneumatic cylinders, distributed over the outer periphery of the ramp and exerting convergent thrust forces directed towards the axis of the rotor.
  • Such fastening means allow both a tilting movement and a slight movement of radial translation relative to the axis of the rotor.
  • separate additional means will be provided to ensure a radial adjustment of greater amplitude than that permitted by said fixing means.
  • This variant which makes it possible to vary the radius p, is particularly advantageous since it is not possible in advance, without measuring ⁇ with precision, to know exactly the value of p which will give the roller the speed of rotation corresponding to optimal rolling conditions.
  • this value is between the minimum radius G of the roller at the bottom of the groove and the maximum radius F of the part of the groove in contact with the rolled product
  • we choose a priori a lateral position of the ramp such that the contact between the ramp and the conical bearing is made at the level of half the depth of the groove and the lateral position of the ramp is then adjusted so as to achieve the optimal rolling conditions between the roller and the rolled product which result in an absence of slippage, a good surface condition of the rolled product and minimal wear of the rollers.
  • the option A% different from zero means that the user accepts, during the first moments of contact with the product to be rolled, a certain rate of sliding of the roller bearing on the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Rolling Contact Bearings (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Pulleys (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Crushing And Grinding (AREA)
  • Conductive Materials (AREA)
  • Feed For Specific Animals (AREA)
EP85440064A 1984-11-14 1985-11-07 Dispositif d'entraînement en rotation des galets de travail d'une installation de laminoir planétaire de produits longs Expired EP0181828B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85440064T ATE44893T1 (de) 1984-11-14 1985-11-07 Rotationsantriebsvorrichtung fuer arbeitsrollen eines planetenwalzwerkes fuer langes walzgut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417694A FR2572962A1 (fr) 1984-11-14 1984-11-14 Dispositif d'entrainement en rotation des galets de travail d'une installation de laminoir planetaire
FR8417694 1984-11-14

Publications (2)

Publication Number Publication Date
EP0181828A1 EP0181828A1 (fr) 1986-05-21
EP0181828B1 true EP0181828B1 (fr) 1989-07-26

Family

ID=9309783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85440064A Expired EP0181828B1 (fr) 1984-11-14 1985-11-07 Dispositif d'entraînement en rotation des galets de travail d'une installation de laminoir planétaire de produits longs

Country Status (8)

Country Link
EP (1) EP0181828B1 (cs)
JP (1) JPS61126912A (cs)
AT (1) ATE44893T1 (cs)
CA (1) CA1285793C (cs)
CS (1) CS261230B2 (cs)
DD (1) DD239133A5 (cs)
DE (1) DE3571776D1 (cs)
FR (1) FR2572962A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2225763C1 (ru) * 2002-11-19 2004-03-20 Южно-Уральский государственный университет Валок для шаговой прокатки

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978933A (en) * 1958-03-05 1961-04-11 Sendzimir Tadeusz Beambacked planetary rolling mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2225763C1 (ru) * 2002-11-19 2004-03-20 Южно-Уральский государственный университет Валок для шаговой прокатки

Also Published As

Publication number Publication date
DE3571776D1 (en) 1989-08-31
CA1285793C (fr) 1991-07-09
DD239133A5 (de) 1986-09-17
ATE44893T1 (de) 1989-08-15
CS817085A2 (en) 1988-05-16
CS261230B2 (en) 1989-01-12
EP0181828A1 (fr) 1986-05-21
FR2572962A1 (fr) 1986-05-16
JPS61126912A (ja) 1986-06-14

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