EP0279334A2 - Dispositif de levage pour une lingotière de coulée continue - Google Patents

Dispositif de levage pour une lingotière de coulée continue Download PDF

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Publication number
EP0279334A2
EP0279334A2 EP88101908A EP88101908A EP0279334A2 EP 0279334 A2 EP0279334 A2 EP 0279334A2 EP 88101908 A EP88101908 A EP 88101908A EP 88101908 A EP88101908 A EP 88101908A EP 0279334 A2 EP0279334 A2 EP 0279334A2
Authority
EP
European Patent Office
Prior art keywords
lifting device
gear
mold
eccentric
shaft
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Withdrawn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
EP88101908A
Other languages
German (de)
English (en)
Other versions
EP0279334A3 (fr
Inventor
Werner Dipl.-Ing. Schümers
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Edelstahlwerke AG
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 Thyssen Edelstahlwerke AG filed Critical Thyssen Edelstahlwerke AG
Publication of EP0279334A2 publication Critical patent/EP0279334A2/fr
Publication of EP0279334A3 publication Critical patent/EP0279334A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the invention relates to a lifting device by means of which a mold on continuous casting plants is set into sinusoidal vibrations.
  • Lifting devices are equipped in a known manner with an eccentric drive for the lifting table carrying the mold, which is periodically moved up and down along fixed guides.
  • eccentric drive for the lifting table carrying the mold, which is periodically moved up and down along fixed guides.
  • synchronously driven eccentrics are arranged in the region of the corners of the lifting table, on which leaf springs are attached on the one hand and on the other hand on the lifting table for transmitting the eccentric strokes.
  • the strand withdrawal curve C is the speed curve E of the Mold (Fig. 1) cuts in the area of its steep drop. This means that the time t N during which the directions of movement of the continuous casting mold and the strand are the same is short. However, this creates a long negative strip NS, which in turn is unfavorable due to the formation of chatter marks.
  • Fig. 2 (Technical Research Center Nippon Kokan K.K., Japan) shows in part a) the possibility of changing the sinusoidal course of the mold lifting movement into a non-sinusoidal one with an increased steep drop when reversing the movement.
  • the invention is based on the object of making a change in the course of the oscillation during the up and down movement of the mold possible in a constructive and operationally simple manner without the disadvantages of the previous solutions mentioned.
  • a lifting device with the features of claim 1 is proposed according to the invention.
  • the propeller shafts provided according to the invention allow a sensitive influence on the sinus curve of the lifting movement of the continuous casting mold, which can also be carried out after installation and during ongoing operation.
  • the solution according to the invention is structurally inexpensive, it is robust and does not cause a high maintenance effort. It also enables a number of different design variants with single and multiple drives, switching on gears, adjustability in the horizontal and / or vertical direction.
  • the invention makes use of the so-called gimbal error. This usually occurs unintentionally if a propeller shaft is not used in alignment between two shafts. This gimbal error is used positively in the case of the lifting device according to the invention in order to adjust the movement sequence of the mold during its lifting movement.
  • the individual advantages of using the lifting device according to the invention are as follows: - Installation of cardan shafts as low-maintenance components, - the stroke curve can also be changed during casting depending on other parameters, - the cardan shafts can be installed in existing systems, - the proven 4-eccentric drive can be retained, - The costs for investment and maintenance are low.
  • FIG 3 shows the eccentric shafts A, each with two eccentrics in the mold lifting device , to which connecting rods C or leaf springs are attached, which protrude from the mold lifting table with the mold K and, when the eccentric shafts A rotate, move up and down in the direction of the arrow.
  • the two eccentric shafts A are each connected via an articulated head G and a flange connection L to an articulated shaft D, the articulated shafts D at their end facing away from the articulated head G likewise being connected via an articulated head H to the gearbox P and via this to the rotary drive B.
  • By rotating the rod ends G, H against each other you can deliberately create a gimbal error.
  • the position of the joint head H facing away from the eccentric shaft A can be changed, as a result of which the position angle ⁇ changes. Both rotation options can be used additively or alternatively.
  • the flange connections L, N must be loosened and closed again after adjustment.
  • Fig.4 shows a modified embodiment in which the propeller shaft D is switched on between the gearbox P of the motor B and the gearbox P1, which is connected to the eccentric shaft A.
  • motor B and gearbox P are mounted so that they can be adjusted in the direction of the arrow to adjust the position angle ⁇ .
  • the speed profiles for the embodiment shown in FIG . 4 are shown in FIG . 5 .
  • the sine curves E (solid line) for the mold speeds without gimbal errors at a stroke rate of 1000 min ⁇ 1 and E3 (dotted) for a stroke rate of 40 min ⁇ 1 the non-sinusoidal curve E4 (dashed) Mold speed with gimbal error 50 ° at a stroke rate of 40 min ⁇ 1 and the straight strand extraction curve C, the courses of the angular velocities W1 in front of the first joint H, W2 with gimbals behind the first joint H and W3 behind the second joint G are shown.
  • two cardan shafts D1 and D2 are arranged, between which a height-adjustable gear P2 is switched on to form and possibly change the position angle ⁇ for the purpose of changing the size of the gimbal error. Due to the gear ratio, the two gimbal errors overlap and the angular velocity W of the eccentric shafts A swells up and down.
  • the gear P2 can be designed as a double planetary gear according to Fig.7 .
  • S denotes the sun gears coupled to the cardan shafts D, and T the planet gears meshing with them, each of which is surrounded by a ring gear R with which they are also meshed.
  • the cardan shafts D are rotated against each other and the total gimbal error can thus also be changed during the running drive of the lifting device during casting.
  • the cardan shafts D1 and D2 can either be rotated against each other under computer control during casting via an adjustable ring gear R or adjustable planet gears. This allows the mold oscillation to be changed during the casting operation.
  • FIG. 8 shows a known universal joint and FIG. 9 shows the associated speed profiles and the gimbal error that occurs due to the position angle ⁇ , which manifests itself in a displacement of the speed profile as a function of angle ⁇ .
  • the position angle ⁇ is also selected as a variable parameter in the curves in FIG. 11 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Casting Devices For Molds (AREA)
EP88101908A 1987-02-16 1988-02-10 Dispositif de levage pour une lingotière de coulée continue Withdrawn EP0279334A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873704793 DE3704793A1 (de) 1987-02-16 1987-02-16 Hubvorrichtung an einer stranggusskokille
DE3704793 1987-02-16

Publications (2)

Publication Number Publication Date
EP0279334A2 true EP0279334A2 (fr) 1988-08-24
EP0279334A3 EP0279334A3 (fr) 1989-02-08

Family

ID=6321057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101908A Withdrawn EP0279334A3 (fr) 1987-02-16 1988-02-10 Dispositif de levage pour une lingotière de coulée continue

Country Status (4)

Country Link
EP (1) EP0279334A3 (fr)
JP (1) JPS63203253A (fr)
KR (1) KR880010186A (fr)
DE (1) DE3704793A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998048960A1 (fr) * 1997-04-26 1998-11-05 Sms Schloemann-Siemag Aktiengesellschaft Methode de balancement d'une coquille de coulee continue
GB2334691A (en) * 1998-02-26 1999-09-01 Kvaerner Metals Cont Casting Skewed sinusoidal profile for displacement of a continuous casting mould

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854329A1 (de) * 1998-11-25 2000-05-31 Schloemann Siemag Ag Verfahren zum Oszillieren einer Stranggießkokille mittels variabler Oszillationsparameter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583675C3 (de) * 1967-12-28 1973-01-04 Mannesmann-Meer Ag, 4050 Moenchengladbach Axiale Kokillenbewegungseinrichtung für Stranggießanlagen
DE2061436B2 (de) * 1970-12-14 1977-12-15 Schloemann-Siemag AG, 4000 Düsseldorf Stranggiessanlage
IT1104414B (it) * 1978-08-23 1985-10-21 Continua Int Dispositivo per impartire il movimento oscillatorio alla lingottiera aperta da una linea di colata in impianti per la colata continua di metalli in particolare di acciai
DE3000117A1 (de) * 1980-01-03 1981-07-09 Sack GmbH, 4000 Düsseldorf Antriebs- und fuehrungsvorrichtung fuer eine stranggiesskokille

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998048960A1 (fr) * 1997-04-26 1998-11-05 Sms Schloemann-Siemag Aktiengesellschaft Methode de balancement d'une coquille de coulee continue
CN1072049C (zh) * 1997-04-26 2001-10-03 Sms舒路曼-斯玛公司 使连铸结晶器振动的方法
GB2334691A (en) * 1998-02-26 1999-09-01 Kvaerner Metals Cont Casting Skewed sinusoidal profile for displacement of a continuous casting mould

Also Published As

Publication number Publication date
DE3704793C2 (fr) 1990-05-17
KR880010186A (ko) 1988-10-07
JPS63203253A (ja) 1988-08-23
DE3704793A1 (de) 1988-08-25
EP0279334A3 (fr) 1989-02-08

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