EP0371280B1 - Procédé de dressage de tôles, bandes, plaques, profilés, poutres etc. - Google Patents

Procédé de dressage de tôles, bandes, plaques, profilés, poutres etc. Download PDF

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Publication number
EP0371280B1
EP0371280B1 EP89120439A EP89120439A EP0371280B1 EP 0371280 B1 EP0371280 B1 EP 0371280B1 EP 89120439 A EP89120439 A EP 89120439A EP 89120439 A EP89120439 A EP 89120439A EP 0371280 B1 EP0371280 B1 EP 0371280B1
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EP
European Patent Office
Prior art keywords
straightening
rolls
roll
machine
measured
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
EP89120439A
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German (de)
English (en)
Other versions
EP0371280A2 (fr
EP0371280A3 (fr
Inventor
Gerd Dr. Beisemann
Klaus Pietsch
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
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Publication date
Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT89120439T priority Critical patent/ATE90232T1/de
Publication of EP0371280A2 publication Critical patent/EP0371280A2/fr
Publication of EP0371280A3 publication Critical patent/EP0371280A3/fr
Application granted granted Critical
Publication of EP0371280B1 publication Critical patent/EP0371280B1/fr
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    • 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
    • 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers

Definitions

  • the invention relates to a method for straightening sheets, strips, sheets, profiles, beams, etc., according to the preamble of claim 1.
  • Deviations in the properties of the leveling material entering the leveling machine usually lead to undesirable leveling results.
  • a change in strength causes one Changed discharge curvature of the leveling material that runs out of the leveling machine.
  • changed straightening properties can also be determined with changed properties of the straightening material, which in turn lead to changed spring-back values and thus to changed effective positions, it can be seen that the stability of the straightening result in the event of scatter in the product parameters is largely determined by the spring-back behavior of the straightening machine. This corresponds to previous practical experience. In the case of high-strength, thick sheets, for example, the spring deflection can even become the dominant component of effective roll adjustment.
  • the machine rigidity is also used for an approximate description of the suspension behavior.
  • a stiffness matrix is particularly suitable for the linearized description of the dependencies between individual roller forces and individual suspensions.
  • the elements of the matrix can also depend on the respective operating point. Calculations have shown that there is a connection between the property changes of the straightening material entering the straightening machine (yield point) and the straightening result (curvature of the outgoing straightening material). Different machine stiffnesses have very different courses. Similar relationships can also be demonstrated for the parameters that depend on the thickness and width of the material to be straightened. In terms of process technology, it is fundamentally advantageous for the scattering to have as little effect as possible on the bending process, ie as far as possible flat functions.
  • the process is determined by the vertical positions of the straightening rollers, which are selected depending on the desired straightening result and the properties of the straightening material.
  • the upper and lower straightening rollers can be adjusted individually or together.
  • hydraulic piston-cylinder units are also used as adjusting devices.
  • the roller straightening gap is set and corrected with the aid of control wedges which are connected to pressure cylinders and spindle drives as displacement devices.
  • the control wedges are arranged running in the longitudinal direction of the straightening rollers and are therefore operatively connected to both bearings of the straightening roller in the same way.
  • the object of the invention is to use suitable measures to detect fluctuations and variations in the properties of the straightening good without a time delay and to switch off their effects, in particular also taking into account and compensating for off-center disturbances
  • each straightening forces acting perpendicularly on both sides of the axis of rotation of a straightening roller and / or its roller bearings and / or on the frame of the straightening machine are measured independently of one another, and in that the position of the rotational axis of the straightening rollers is adjusted as a function of these measured values at both ends of an axis of rotation takes place independently of one another, the straightening rollers being automatically adjusted in the range of the varying pressure forces that occur.
  • each of the straightening forces acting perpendicularly on both sides of the axis of rotation of a straightening roller and / or its roller bearings and / or on the frame of the straightening machine are measured independently of one another, and in that the position of the axes of rotation of the straightening rollers is adjusted as a function of these measured values both ends of an axis of rotation can be done independently, can be very Advantageously, every increased load occurring during the operation of the rolling mill, in particular also every off-center increased load on the straightening roll, is measured directly and corrected without delay. The practically instantaneous correction of the straightening roller position depending on the measured values is achieved in particular by the automatic adjustment of the straightening rollers.
  • the individual forces acting perpendicular to the axes of rotation of the straightening rollers and / or roller bearings and / or on the frame of the straightening machine can be determined very easily in a manner known per se by direct or indirect measurement, the measurement of the straightening forces on the frame using the elastic deformations. In most cases, measuring devices of only one type known per se are sufficient for this.
  • a control device known per se which, depending on the forces measured with the measuring devices and / or depending on the deformation paths measured using the measuring devices and possibly depending on the properties (yield strength, width, thickness ..) of the straightening material-dependent correction of the straightening roller position which can be adjusted during straightening, so that the parallel displacement of the straightening roller axes caused by this correction runs in the opposite direction in the direction determined by the elastic deformations of the machine.
  • This very advantageously keeps the roller straightening machine free from fluctuations and scatter in the properties of the straightening good.
  • the adjustment or correction of the straightening roller position is the same as that due to the elastic Deformations occurred after the straightening rollers were shifted.
  • a complete compensation of the influences, such as elastic deformations, starting from the leveling material and acting on the leveling machine, in particular on the leveling rollers, is achieved, which causes the leveling machine to behave rigidly, almost infinitely stiffly, without placing high demands on the actual machine rigidity have to.
  • the adjustment or correction of the straightening roller position is greater than the displacement of the respective straightening roller due to the elastic deformations.
  • This corresponds to an overcompensation of the straightening machine, the curve of which, as the graphic diagram shows, runs completely flat, ie flat.
  • An overcompensation of the elastic deformations which is suitably selected depending on the operating point of the straightening machine, allows a material influence of the straightening material on the straightening result for a wide range (e.g. the strength) to be suppressed practically completely and thereby to achieve a previously unattained, stable behavior of the work process.
  • the adjustment or correction of the straightening roller position can also be smaller than the displacement of the respective straightening roller due to the elastic deformations. This corresponds to a partial compensation of the influences of the leveling material on the leveling machine, which can be advantageous if the number of straightening rollers adjustable under load is small compared to the total number of rollers.
  • the correction values of the straightening roller positions can be very easily from case to case arithmetically determined with the help of PC computers and, depending on the calculated values, the straightening machine can either be driven by force or position-controlled.

Claims (6)

  1. Procédé pour le dressage de feuilles métalliques, bandes, plaques, profilés, poutres ... etc dans une dresseuse dans laquelle le produit à dresser est forcé à travers une fente de dressage formée par plusieurs galets supérieurs et inférieurs, et réglée, conformément à la section et à la résistance nominale du produit à laminer, et dans laquelle les forces de dressage sont mesurées sur au moins un galet de la dresseuse et les positions des galets de dressage sont réglées en fonction des valeurs mesurées,
       caractérisé en ce qu'on mesure indépendamment l'une de l'autre toute force de dressage agissant verticalement sur les deux côtés de l'axe de rotation d'un galet de dressage et/ou sur les roulements de celui-ci et/ou sur le cadre de la dresseuse, et en ce qu'on effectue le réglage de la position des axes de rotation des galets de dressage indépendamment aux deux extrémités d'un axe de rotation en fonction de ces valeurs de mesure, les galets de dressage étant régulés automatiquement dans la zone des forces de pression variables.
  2. Procédé selon la revendication 1,
       caractérisé en ce que le réglage ou la correction de la position des axes de rotation des galets de dressage est effectué en fonction des valeurs mesurées au produit à dresser comme la limite d'élasticité, la largeur, l'épaisseur etc.
  3. Procédé selon la revendication 1 ou 2
       caractérisé en ce que le réglage ou la correction de la position des axes de rotation des galets de dressage est de valeur identique au déplacement des galets de dressage par suite de la déformation élastique.
  4. Procédé selon la revendication 1 ou 2
       caractérisé en ce que le réglage ou la correction de la position des axes de rotation des galets de dressage est de valeur supérieure au déplacement des galets de dressage par suite de la déformation élastique.
  5. Procédé selon la revendication 1 ou 2
       caractérisé en ce que le réglage ou la correction de la position des axes de rotation des galets de dressage est de valeur inférieure au déplacement des galets de dressage par suite de la déformation élastique.
  6. Procédé selon l'une ou plusieurs des revendications 1 à 5 précédentes
       caractérisé en ce qu'on calcule les valeurs correctives de la position des axes de rotation des galets de dressage selon la formule suivante, et en ce qu'on effectue les corrections de façon correspondante :
    Figure imgb0008
     pour i = 1, ..., k et j = 1, ..., l + m, avec
    Δp₁,..., Δpk :   modifications des k (au total) positions des galets de dressage sous charge,
    F₁,..., Fl :   valeurs mesurées aux l (au total) endroits de mesure de force,
    u₁,..., um :   valeurs mesurées des m (au total) déformations élastiques mesurées,
    mij :   dérivées partielles des positions de galet a₁,....., ak correspondant aux Δp₁,.....,Δpk modifications de position par rapport aux valeurs mesurées aux déformations élastiques:
    Figure imgb0009
    Figure imgb0010
     et
    c :   facteur d'amplification, par exemple compris entre -2,5 et +2,5
    (c = 1 ≅ revendication 3,
    c > 1 ≅ revendication 4,
    c < 1 ≅ revendication 5)
    réglable manuellement et/ou automatiquement en fonction du produit et/ou par adaptation en fonction du résultat de dressage.
EP89120439A 1988-11-26 1989-11-04 Procédé de dressage de tôles, bandes, plaques, profilés, poutres etc. Expired - Lifetime EP0371280B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89120439T ATE90232T1 (de) 1988-11-26 1989-11-04 Verfahren zum richten von blechen, baendern, tafeln, profilen, traegern etc.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840016A DE3840016A1 (de) 1988-11-26 1988-11-26 Verfahren zum richten von blechen, baendern, tafeln, profilen, traegern etc.
DE3840016 1988-11-26

Publications (3)

Publication Number Publication Date
EP0371280A2 EP0371280A2 (fr) 1990-06-06
EP0371280A3 EP0371280A3 (fr) 1991-05-02
EP0371280B1 true EP0371280B1 (fr) 1993-06-09

Family

ID=6367981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120439A Expired - Lifetime EP0371280B1 (fr) 1988-11-26 1989-11-04 Procédé de dressage de tôles, bandes, plaques, profilés, poutres etc.

Country Status (5)

Country Link
US (1) US5115653A (fr)
EP (1) EP0371280B1 (fr)
JP (1) JPH02182320A (fr)
AT (1) ATE90232T1 (fr)
DE (2) DE3840016A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653569C2 (de) * 1996-12-20 1999-07-22 Witels App Masch Albert Gmbh Verfahren zur automatisierten Führung eines Richtprozesses
EP1038602B1 (fr) * 1999-03-26 2002-05-22 SMS Demag AG Méthode et dispositif pour cintrer des profiles
DE102004041732A1 (de) * 2004-08-28 2006-03-02 Sms Demag Ag Verfahren zum Richten eines Metallbandes und Richtmaschine
CN100584478C (zh) * 2005-08-22 2010-01-27 西安重型机械研究所 液压动态恒压矫直方法
DE102006009173B4 (de) * 2006-02-24 2015-02-05 Kocks Technik Gmbh & Co. Kg Verfahren zum Ermitteln der Walzkraft in einem Walzgerüst und Walzgerüst
CN101733308B (zh) * 2008-11-17 2012-02-01 鞍钢股份有限公司 一种热矫直机入口及出口矫直力保护方法
CN102489551B (zh) * 2011-11-22 2013-08-28 南京钢铁股份有限公司 中厚板轧制矫直机松卡缸压力自适应控制方法及控制结构
CN102527774B (zh) * 2012-01-19 2014-07-09 太原科技大学 一种辊式矫直机压下工艺参数动态调整方法
RS60196B1 (sr) * 2015-12-21 2020-06-30 Komax Holding Ag Uređaj za ispravljanje kablova
AT522234B1 (de) * 2019-02-28 2022-05-15 Evg Entwicklungs U Verwertungs Ges M B H Verfahren und Vorrichtung zum Geraderichten von Draht oder Bandmaterial

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1210674A (en) * 1967-11-21 1970-10-28 Davy & United Eng Co Ltd Apparatus for processing sheet and strip material
US3566638A (en) * 1968-05-29 1971-03-02 Textron Inc Screwdown system for a rolling mill
DE1934496A1 (de) * 1969-07-08 1971-01-21 Schloemann Ag Walzenrichtmaschine fuer Blech und Band
US4152913A (en) * 1976-12-21 1979-05-08 Horst Zerhoch Vorrichtungs und maschinenbau GmbH & Co. KG Straightening machine for straightening sheet metal and flat materials
US4454738A (en) * 1981-06-29 1984-06-19 The Paxson Machine Company Roller leveler and method of operating same
DE3308616C2 (de) * 1983-03-11 1993-11-25 Schloemann Siemag Ag Verfahren und Maschine zum Richten von Blech
JPS6061108A (ja) * 1983-09-13 1985-04-08 Mitsubishi Electric Corp 連続圧延機の負荷配分制御方法
DE3430034A1 (de) * 1984-08-16 1986-02-27 Mannesmann AG, 4000 Düsseldorf Planheitsregelung an bandwalzgeruesten
DE3437777A1 (de) * 1984-10-16 1986-04-24 Fr. W. Schnutz GmbH & Co, 5900 Siegen Stuetzwalzenverstellung fuer richtmaschinen
US4730472A (en) * 1986-07-10 1988-03-15 United Engineering, Inc. Hydraulic contouring means for a hot or cold leveler machine
JPH0626723B2 (ja) * 1986-09-24 1994-04-13 三菱電機株式会社 板材の形状制御方法

Also Published As

Publication number Publication date
US5115653A (en) 1992-05-26
EP0371280A2 (fr) 1990-06-06
DE58904631D1 (de) 1993-07-15
JPH02182320A (ja) 1990-07-17
EP0371280A3 (fr) 1991-05-02
DE3840016A1 (de) 1990-05-31
ATE90232T1 (de) 1993-06-15

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