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WO1999059757A1 - Dispositif et procede de sectionnement tres rapide de barres laminees en avance continue - Google Patents

Dispositif et procede de sectionnement tres rapide de barres laminees en avance continue Download PDF

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Publication number
WO1999059757A1
WO1999059757A1 PCT/IT1999/000118 IT9900118W WO9959757A1 WO 1999059757 A1 WO1999059757 A1 WO 1999059757A1 IT 9900118 W IT9900118 W IT 9900118W WO 9959757 A1 WO9959757 A1 WO 9959757A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutters
cutting
shear
rolled section
advancement
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.)
Ceased
Application number
PCT/IT1999/000118
Other languages
English (en)
Inventor
Renzo Offoiach
Raffaele Di Sarno
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.)
SIMAC SpA
Original Assignee
SIMAC SpA
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 SIMAC SpA filed Critical SIMAC SpA
Priority to AU38466/99A priority Critical patent/AU3846699A/en
Publication of WO1999059757A1 publication Critical patent/WO1999059757A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D36/00—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut
    • B23D36/0008—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices
    • B23D36/0033—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices for obtaining pieces of a predetermined length
    • B23D36/0041—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices for obtaining pieces of a predetermined length the tool moving continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/18—Switches for directing work in metal-rolling mills or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • B23D25/12—Shearing machines with blades on coacting rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • 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
    • B21B37/70—Length control

Definitions

  • the present invention has for object a high speed cutting method for rolled sections in continuous advancement and cutting group thought for working by such method.
  • the cutting groups of the present invention usually include substantially at least a shear for the rolled sections cutting, generally known as flying shear, to which a shifter is associated, which alternatively shifts the bar on two channels placed downstream the shear, in order to allow the cut crop-ends advancement stopping, generally by means of a tail-braking device of known art, and then the following discharge on an underlying cooling bed, also known as cooling plate.
  • These cutters generally include a couple of opposite rotating cutters, which are stopped in stand-by, and at the suitable time are made rotate substantially at the peripheral speed corresponding to the advancement speed of the rolled section to be cut + O%/+10%.
  • T-8397A/87 (Danieli), utilises said system and for a rational co-ordination it obviously provides the co-ordination of the shifter movement with respect to the cutters movement and in the specific case: the synchronization between the rotating cutters circumferential position and the shifter temporal side position, in the phase just previous to the cutting. All this being anyway obvious and necessary in order to allow a rational cutting, with no jamming or cutting errors.
  • the solution of making the cutters rotate continuously has the great advantage of working at high speeds and practically evenly with the bar advancement speed also up to 100 m/sec and over.
  • the present innovation substantially thought for a cutting group in which the cutters are continuously rotating as above and the bar is made pass at a suitable time beneath the cutters in continuous rotation for the cutting, just like in the solution proposed in said IT-769668 (Application 9027/65 - DEMAG).
  • These cutting groups though, which adopt continuously rotating cutters, have the drawback of wasting or scrapping a bar crop-end at the beginning (bar head) and a bar crop-end at the end (bar tail), and anyway present errors in the exact positioning of the rolled section cutting point, particularly the cutting values being corresponding to a certain necessarily whole number of blade revolutions.
  • the main purpose of the present invention is that of making all the cut bars have the same length.
  • a further purpose of the present invention is that of obtaining the highest number of bars from the rolled section whole length.
  • discard which is wasted, that is, destined to scrapping
  • the standard lengths of the bars to be cut by the shear are generally equal to "n x c", where "n” is the number of submultiples which can be obtained from a bar discharged on the cooling plate, and "c” is the length of the bars which make up the finished product bundle.
  • the cutters in continuous rotation for the rolled section cutting to measure use a cutters angular speed which is constant in time and: - the shifter movement is tightly bound to the cutters angular speed (IT-769668 - application 9027/65 - DEMAG); - otherwise the shifter movement is adjustable by synchronization means with respect to the cutters position in the phase just previous to the cutting (IT- 8397A/87 - Danieli).
  • the present invention is neither directed to one nor to the other of these solutions.
  • the purpose of the present innovation is that of obviating the aforementioned drawbacks and of substantially making possible: - a higher operational speed; - the avoidance of material wasting in the rolled section head and tail; - a greater functionality with minor stress for the mechanisms and a whole system simplification.
  • a high speed cutting method for rolled sections in continuous advancement of the type in which is substantially provided: - a flying shear for the rolled section cutting with always rotating cutters; - shifter means which guide the rolled section to be cut from a position sideways of said cutting rotating cutters, through said cutting cutters, for carrying out the cutting, and - sensing means of the rolled section to be cut; characterised in that - said sensor means of the rolled section to be cut include at least means for detecting its advancement speed "Vb" and its position "Pb” along the advancement line with respect to the cutting point; - computer means and means for changing the rotational speed of said cutters "Vr", with finding of the respective angular position "Pc", driven by said computer means are further provided, and in which: - said rolled section sensor means are connected to said computer means; - some programming means are further provided for forcing said rotating cutters to rotate at a higher or a minor "Vr” in function: - of said "
  • said method and computer means are conceived in a way that: - in case the remaining rolled section tail length was minor than "c", said computer shall provide, at least, for reducing of a unit said value "n" of the pre-determined cutting length, in at least the penultimate bar, and this in order to make said last bar increase of an equal length.
  • said computer shall provide, at least, for reducing of a unit said value "n" of the pre-determined cutting length, in at least the penultimate bar, and this in order to make said last bar increase of an equal length.
  • the shear is a cutting to measure system for rolled section made up of a shear in continuous rotation and of a known system for shifting the rolled material.
  • the shear being a machine made up of two or more cutters counter-rotating on two rotation axes parallel one to the other and driven in their movement by a known electric motor.
  • the cutting occurs by a displacement orthogonal to the rolling axis, the shifting system brings the rolled section beneath the shear cutters for then displacing it away from the cutters interference once this has been cut.
  • the high speed shear system is thus made up of - a rotating shear with one or more cutters - a rolled section shifting system - an automation system which is made up of: - a micro-processor system which controls the cutting process; - an electric drive electrically connected to the finishing stand; - an electric drive mechanically connected to the shear cutters; - a pneumatical or electric or hydraulic drive connected to the shifting device; - a sensor of the rolled section position; - a sensor of the shear cutters angular position (encoder); - three sensors of the shifting device position, respectively: - one on a side - one on the other side; and - one at the centre in the middle position, corresponding to the cutting one; - a sensor of the rolling cylinders angular position (en
  • Such electronic system is thus able to effect a continuous synchronization between the head position of the rolled section in advancement on the rolling line (“Master” electric axis, that is master electric axis) and: - the shear cutters position and rotation speed.
  • Master electric axis that is master electric axis
  • Shear electric axis that is slave electric axis
  • - the material shifting device position (Slave” electric axis)
  • the control principle between the "Master” axis and the “Slave” axes is based on that: -
  • the rolled section axis represents the control system "Master” axis while the cutters rotation axis is the “Slave” axis which must be synchronized with the "Master” axis.
  • the synchronism point is the cutting point at the desired length of the rolled material on the "Master” axis and the cutters crossing for the "Slave” axis.
  • the perfect synchronization occurs when once it has passed a cutting to measure length on the "Master” axis "nc"; the "Slave” axis is at the cutters crossing with the speed necessary for correctly performing the cutting.
  • Such adjustment occurs by means of a control closed ring where, moment by moment, the shear cutters position in time is generated and corrected.
  • the bar in advancement is displaced with a certain advance with respect to the cutting time, this being performed by the displacement device movement control; - being further provided that: - during the shear cutters revolution previous to the cutting one, such device brings the material on the axis of interference with the cutters before these may cross; - the two axes interference phase causes the bar cutting. - once this has occurred, the shifter moves the rolled section into a non- interference position before the cutters complete their next revolution. - once this has occurred, the shifter remains into an external position with respect to the cutting axis up to the next cutting cycle.
  • Figure 1 is a schematic view of the rolling line section concerning the cutting plant according to the present invention.
  • Figure 1 A is a block schematic view of the cutting shear group drive and control system according to the present invention and which thus is an integrant part of Figure 1.
  • Figures 2 and 3 are respective front and side schematic views of the shear controlled by the system according to the present invention.
  • Figure 4 shows the system operational scheme, that is the operational method according to the present invention, in its optimal version.
  • "L” indicates the rolled section in advancement and the corresponding rolling line
  • (Lb) indicates a bar cut in a first shifting line
  • (Lb') indicates the second shifting line for a next cut bar, being the cut bars shifted on one or on the other channel (25), by means of a shifter (23) placed upstream the always rotating opposite cutters (24).
  • a tail-braking device (bars braking device 5) and a movable multi-channel raceway (6) also of known art which has the function of receiving the bars, that after being stopped in their advancement are made fall onto an underlying cooling bed, also known as cooling plate, which provides for the transversally cut bars translation, before conveying them again in a movement longitudinal to the packing line also of known art and not shown, are provided.
  • the shifter (23) is controlled by a fluidynamical cylinder (234) and its movement is controlled by three position sensors: - two end ones (231 -233) for the corresponding shifting lines (Lb, Lb') and - a centre one (232) for detecting the moment of passage under the cutting cutters ( 24 ) .
  • the cutters are driven by an electric motor (20) whose angular position parameters, and following rotational speed, are transmitted by an encoder (21), while the cutters crossing position is determined by a cutters crossing sensor (22).
  • the shifter control fluidynamical cylinder (234) is controlled and driven by the computer (7) controlled shifter drive control system (2340).
  • the computer (7) receives the rolled section advancement position and speed parameters, respectively from the encoder (1 1 ) which detects the rotational parameters of the finishing stand (1) rolling cylinders before the shear (2) and from the photocell (L1) which shows the advancing rolled section presence, starting from its coming head, and which thus allows, in function of the angular total route of the finishing stand rolling cylinders and their diameter (1 -11 ) and, in function of the finishing stand distance with respect to the cutting point (232) of the shear (2) cutters (24) and/or of a rolled section head (L1 ) position sensor in relation to its distance form the cutting point, to know the exact moment in which the shifter (23) must be driven for reaching the cutting position (232) and this by a cutters (24) rotation speed slight acceleration or deceleration in function of the rotational parameters detected by the respective encoders (21 ) and of the cutters crossing position (cutting condition 22).
  • the parameters detected by the finishing stand (1) may also be detected by the bars pinch-roll (8) just upstream of the shear or also by a couple of rolls which copy the bar advancement speed (idle rolls provided with said encoder), nothing changing in the innovative system of the present patent.
  • Fig. 1A which should be meant as integrated with Fig. 1 , all is explained, being the respective electric means of known art for the finishing stand (1 ) and shear (2) drive indicated with their respective references (100) and (200).
  • the shear is controlled by a single motor (20) which by a known gear system transmits the same motion in a contrary, equal and symmetrical angular direction to one and the other cutters (24).
  • two electric motors preferably brushless
  • one for each blade (24) axis and the same concept of "Master” electric axis (finishing stand motor or pinch-roll motor placed just upstream the shear), and “slave” electric axis but in this case for both motors of the two cutters which in such case would be driven in an absolutely alike way, are used.
  • the shear eliminates the need of any type of gearing, notoriously noisy and highly limitative for reaching high speeds, being always able to use the cutters (22) crossing sensor and also making possible, thanks to the computing speed of the present processors, to make in operating time corrections of the speed and then of one and the other blade position for obtaining the optimal cutting conditions, which would not otherwise be possible by using the mechanical transmission rigid restrains between the angular position of one and the other cutters.
  • Figure 4 shows the operational method which results very explanatory.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Metal Rolling (AREA)

Abstract

Procédé servant à sectionner très rapidement des barres laminées en avance continue et dispositif permettant de mettre ce procédé en application et comprenant des cisailles volantes servant à sectionner les barres au moyen de lames à rotation continue ; des moyens de déplacement guidant la barre à sectionner depuis une position latérale par rapport aux lames de sectionnement et à travers lesdites lames afin d'exécuter le sectionnement et des moyens de détection de la barre à sectionner qui comportent des moyens servant à détecter les paramètres d'avance de la barre laminée (1, 11) et des moyens automatiques servant à régler la vitesse des lames (24) sur la vitesse et la position de la barre laminée (1-11, L1) en progression vers l'avant et associés à la commande du déplacement de l'élément de déplacement respectif (23). L'invention permet de corriger les erreurs de longueur de sectionnement des barres.
PCT/IT1999/000118 1998-05-19 1999-05-05 Dispositif et procede de sectionnement tres rapide de barres laminees en avance continue Ceased WO1999059757A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38466/99A AU3846699A (en) 1998-05-19 1999-05-05 High speed cutting method for rolled sections in continuous advancement and cutting group thought for working by such method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD980085 IT1299796B1 (it) 1998-05-19 1998-05-19 Metodo di taglio ad alta velocita' per laminati in continuo avanzamento e gruppo di taglio concepito per operare con
ITUD98A000085 1998-05-19

Publications (1)

Publication Number Publication Date
WO1999059757A1 true WO1999059757A1 (fr) 1999-11-25

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PCT/IT1999/000118 Ceased WO1999059757A1 (fr) 1998-05-19 1999-05-05 Dispositif et procede de sectionnement tres rapide de barres laminees en avance continue

Country Status (3)

Country Link
AU (1) AU3846699A (fr)
IT (1) IT1299796B1 (fr)
WO (1) WO1999059757A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070156A1 (fr) * 2001-03-08 2002-09-12 S.I.M.A.C. S.P.A. Dispositif et son equipement de reception et de dechargement de barres, utilises notamment a des fins de manutention et/ou d'emballage en aval de laminoirs, et laminoir correspondant
WO2006092734A1 (fr) * 2005-03-03 2006-09-08 Gdx North America Inc. Bandes renforcees d’etancheite, couvre-joint ou de guidage
US7475524B2 (en) * 2004-06-16 2009-01-13 Danieli & C. Officine Meccaniche S.P.A. Bar packing plant and relative process
ITMI20110217A1 (it) * 2011-02-15 2012-08-16 Semplice Spa Macchina spezzonatrice a produttivita' incrementata per la produzione di bacchette filiformi, particolarmente per la produzione di elettrodi a bacchetta da saldatura.
CN110538871A (zh) * 2019-07-26 2019-12-06 宝钢特钢韶关有限公司 一种防止坯料切头留刀座上的控制方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630233A (fr) *
FR666433A (fr) 1928-01-28 1929-10-01 Schloemann Ag Commande de cisailles ou de cisailles associées à des dispositifs de refroidissement ou de mise en pile
DE804056C (de) 1948-10-23 1951-04-16 Heinrich Th Kleff Verfahren zum Unterteilen laufenden Walzgutes
DE1513248A1 (de) * 1964-03-02 1969-07-03 Zd Y V I Plzen Narodni Podnik Verfahren zur Regelung der Lage bei fliegenden Rotationsscheren
FR1578587A (fr) 1967-08-29 1969-08-14
FR2333604A1 (fr) * 1975-12-04 1977-07-01 Kawasaki Heavy Ind Ltd Machine a cisailles volantes du type a tambours rotatifs
GB2075899A (en) 1980-05-16 1981-11-25 Thaelmann Schwermaschbau Veb Rotatable cropping shear assembly
EP0618033A1 (fr) * 1993-04-02 1994-10-05 DANIELI & C. OFFICINE MECCANICHE S.p.A. Cisaille volante

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630233A (fr) *
FR666433A (fr) 1928-01-28 1929-10-01 Schloemann Ag Commande de cisailles ou de cisailles associées à des dispositifs de refroidissement ou de mise en pile
DE804056C (de) 1948-10-23 1951-04-16 Heinrich Th Kleff Verfahren zum Unterteilen laufenden Walzgutes
DE1513248A1 (de) * 1964-03-02 1969-07-03 Zd Y V I Plzen Narodni Podnik Verfahren zur Regelung der Lage bei fliegenden Rotationsscheren
FR1578587A (fr) 1967-08-29 1969-08-14
FR2333604A1 (fr) * 1975-12-04 1977-07-01 Kawasaki Heavy Ind Ltd Machine a cisailles volantes du type a tambours rotatifs
GB2075899A (en) 1980-05-16 1981-11-25 Thaelmann Schwermaschbau Veb Rotatable cropping shear assembly
EP0618033A1 (fr) * 1993-04-02 1994-10-05 DANIELI & C. OFFICINE MECCANICHE S.p.A. Cisaille volante

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070156A1 (fr) * 2001-03-08 2002-09-12 S.I.M.A.C. S.P.A. Dispositif et son equipement de reception et de dechargement de barres, utilises notamment a des fins de manutention et/ou d'emballage en aval de laminoirs, et laminoir correspondant
US6855290B2 (en) 2001-03-08 2005-02-15 S.I.M.A.C. S.P.A. Device and respective equipment for receiving and discharging bars, used particularly for handling and/or wrapping purposes downstream of rolling-mills, and its respective rolling-mill
US7475524B2 (en) * 2004-06-16 2009-01-13 Danieli & C. Officine Meccaniche S.P.A. Bar packing plant and relative process
WO2006092734A1 (fr) * 2005-03-03 2006-09-08 Gdx North America Inc. Bandes renforcees d’etancheite, couvre-joint ou de guidage
ITMI20110217A1 (it) * 2011-02-15 2012-08-16 Semplice Spa Macchina spezzonatrice a produttivita' incrementata per la produzione di bacchette filiformi, particolarmente per la produzione di elettrodi a bacchetta da saldatura.
WO2012110136A1 (fr) * 2011-02-15 2012-08-23 Semplice S.P.A. Machine de découpe à productivité accrue destinée à la fabrication de tiges de type fil, en particulier à la production d'électrodes du type tige pour soudage
CN110538871A (zh) * 2019-07-26 2019-12-06 宝钢特钢韶关有限公司 一种防止坯料切头留刀座上的控制方法

Also Published As

Publication number Publication date
ITUD980085A1 (it) 1999-11-19
IT1299796B1 (it) 2000-04-04
AU3846699A (en) 1999-12-06

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