WO1980002238A1 - Reglage de la tension dans une installation de laminage continu - Google Patents

Reglage de la tension dans une installation de laminage continu Download PDF

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Publication number
WO1980002238A1
WO1980002238A1 PCT/DE1980/000051 DE8000051W WO8002238A1 WO 1980002238 A1 WO1980002238 A1 WO 1980002238A1 DE 8000051 W DE8000051 W DE 8000051W WO 8002238 A1 WO8002238 A1 WO 8002238A1
Authority
WO
WIPO (PCT)
Prior art keywords
speed
tension
torque
mill
tension control
Prior art date
Application number
PCT/DE1980/000051
Other languages
German (de)
English (en)
Inventor
H Feldmann
W Rohde
H Thiemann
Original Assignee
Schloemann Siemag Ag
H Feldmann
W Rohde
H Thiemann
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 Schloemann Siemag Ag, H Feldmann, W Rohde, H Thiemann filed Critical Schloemann Siemag Ag
Publication of WO1980002238A1 publication Critical patent/WO1980002238A1/fr

Links

Classifications

    • 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
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control

Definitions

  • the invention relates to tension control in continuous rolling mills according to the preamble of the main claim.
  • Loop control and minimum tension control are known as tension controls.
  • the loop control is mainly used for continuous profile rolling and for smaller cross sections. This requires large distances between scaffolding and sling tables.
  • the minimum tension control was created on the basis of the knowledge that longitudinal stresses do not occur in the roll rod if each drive delivers exactly the torque that is required for the material deformation in the associated roll gap.
  • the need for deformation torque is determined for each scaffold of the continuous series during the entire stitch duration and the required deformation torque is maintained by intervening in the speed controls of the main drives.
  • the relationship between the rolling force and the deformation torque for each bar is calculated frame by frame after the tapping.
  • the torque requirement is then determined during the entire stitch duration by means of a continuous measurement of the rolling forces, which involves the detection of changes in the working point.
  • the invention has for its object to provide a tension control, which is based on existing parameters in the rolling mill, and regulates the stands without mechanical engineering additions so that there is essentially a zero rolling tension between the stands.
  • the tension control according to the invention is based on the knowledge that in the tensioned state, with increasing speed difference between two adjacent stands, the driving torque of the roughing stand decreases as a result of train, while with decreasing speed difference, the driving torque of the roughing stand increases.
  • the driving torque of the roughing stand no longer changes and the rolling stock forms a "micro loop" that continues to grow until the speed difference has decreased to zero.
  • the micro-loop formed in this way is dismantled and reduced again when the speed difference becomes positive again, until the micro-loop is drawn in and a jump in driving torque occurs due to the suddenly occurring train.
  • the aforementioned knowledge is advantageously used by periodically changing the speed of one scaffolding, the speed difference being continuously scanned.
  • the roughing stand reacts continuously with changes in torque, then the traction is only carried out when it is under tension. If, however, the roughing stand reacts only temporarily with torque changes and torque jumps during a cycle, then the stands are moved in the desired limit range and the knowledge mentioned is thus advantageously used. If the roughing stand does not react, then uncontrolled sling behavior is used in the draft-free area.
  • Figure 1 is a schematic diagram of part of a rolling mill with two stands.
  • Fig. 4 speed curve according to the invention on a scaffold at a certain speed with the associated torque curve on the roughing stand.
  • n 1 ⁇ and n 2 ⁇ each represent the synchronous speeds.
  • tension is applied between the frames.
  • a superposition of a further speed in sinusoidal form is applied to the frame 20, for example a size ⁇ n s ⁇ sin ⁇ t.
  • the torque curve according to FIG. 4 can be changed so that the gate or jump is shifted in the course of the superimposed torque ⁇ Md 1 .
  • a change in the speed according to FIG. 4 is to be preferred as the setpoint for regulating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

Dans une installation de laminage avec au moins deux laminoirs (10, 20) le reglage de la tension du produit lamine est tel que le laminage a lieu dans la zone frontiere ou la tension s'annule. En particulier, on superpose a un laminoir (20) avec un nombre de rotations n2 une rotation supplementaire. En outre, on superpose au laminoir (20) une rotation additionnelle sous forme sinusoidale. Si la rotation supplementaire est egale a zero l'absence de tension qui regne entre les deux laminoirs (10 et 20), est maintenue. Il y aura cependant une petite boucle qui se formera et qui se resorbera au rythme des oscillations sinusoidales. De ce fait il n'y aura aucune variation de couple au laminoir (10). Si lors de la mise en marche la premiere demi-onde sinusoidale est positive on enregistre pour cette demi-onde et une fois seulement, une variation du couple au laminoir (10). Par la suite il n'y a plus de variation de moment. La rotation supplementaire peut etre choisie egale ou superieure a l'amplitude de la rotation additionnelle. On peut aussi, en changeant la valeur de la rotation supplementaire, modifier le deroulement du couple au laminoir (10).
PCT/DE1980/000051 1979-04-20 1980-04-18 Reglage de la tension dans une installation de laminage continu WO1980002238A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792915942 DE2915942A1 (de) 1979-04-20 1979-04-20 Zugregelung bei kontinuierlichen walzstrassen
DE2915942 1979-04-20

Publications (1)

Publication Number Publication Date
WO1980002238A1 true WO1980002238A1 (fr) 1980-10-30

Family

ID=6068769

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1980/000051 WO1980002238A1 (fr) 1979-04-20 1980-04-18 Reglage de la tension dans une installation de laminage continu

Country Status (3)

Country Link
EP (1) EP0027454A1 (fr)
DE (1) DE2915942A1 (fr)
WO (1) WO1980002238A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290834A1 (fr) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Régulation de la tension dans un laminoir continu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665173B2 (en) 2004-11-05 2010-02-23 Simonette Dallas W Automated cleaning system for structures

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200624A (en) * 1962-02-14 1965-08-17 Bochumer Ver Fur Gusstahlfabri Apparatus and process for processing strip material
DE1427785A1 (de) * 1961-05-03 1969-07-10 Asea Ab Band- oder Drahtwalzwerk
GB1163274A (en) * 1965-12-28 1969-09-04 British Iron Steel Research Improvements in and relating to Rolling Mills
US3553993A (en) * 1969-01-31 1971-01-12 United States Steel Corp Method and apparatus for hot rolling
EP0008037A1 (fr) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Dispositif de commande de la tension dans un laminoir continu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1427785A1 (de) * 1961-05-03 1969-07-10 Asea Ab Band- oder Drahtwalzwerk
US3200624A (en) * 1962-02-14 1965-08-17 Bochumer Ver Fur Gusstahlfabri Apparatus and process for processing strip material
GB1163274A (en) * 1965-12-28 1969-09-04 British Iron Steel Research Improvements in and relating to Rolling Mills
US3553993A (en) * 1969-01-31 1971-01-12 United States Steel Corp Method and apparatus for hot rolling
EP0008037A1 (fr) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Dispositif de commande de la tension dans un laminoir continu

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290834A1 (fr) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Régulation de la tension dans un laminoir continu
US4942543A (en) * 1987-05-15 1990-07-17 Danieli & C. Officine Meccaniche Spa And Ceda Spa Costruzioni Elettromeccaniche E Dispositivi D'automazione Method for regulating the pull in continuous rolling trains and rolling train which adopts said method

Also Published As

Publication number Publication date
DE2915942A1 (de) 1980-10-30
EP0027454A1 (fr) 1981-04-29

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