EP0446499B1 - Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours - Google Patents

Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours Download PDF

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Publication number
EP0446499B1
EP0446499B1 EP90250071A EP90250071A EP0446499B1 EP 0446499 B1 EP0446499 B1 EP 0446499B1 EP 90250071 A EP90250071 A EP 90250071A EP 90250071 A EP90250071 A EP 90250071A EP 0446499 B1 EP0446499 B1 EP 0446499B1
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European Patent Office
Prior art keywords
pipe
pipes
drawn
pull
drum
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
EP90250071A
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German (de)
English (en)
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EP0446499A1 (fr
Inventor
Karl-Heinz Dipl.-Ing. Kemmerling
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to DE90250071T priority Critical patent/DE59003554D1/de
Priority to EP90250071A priority patent/EP0446499B1/fr
Priority to US07/500,041 priority patent/US5014531A/en
Publication of EP0446499A1 publication Critical patent/EP0446499A1/fr
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Publication of EP0446499B1 publication Critical patent/EP0446499B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums

Definitions

  • the invention relates to a method for lowering the drawing speed of drum drawing machines for pipes or the like before the drawing end of a tube bundle, wherein each of a plurality of tube bundles drawn in succession is collected after a pull through the drawing tool in a receiving basket, which in each case step by step after pulling the tube bundle into a Drain station is transported, from where another of several pulling processes in the same order is initiated.
  • a container Arranged below the drawing drum is a container which is referred to as a receiving basket and is dimensioned such that the largest possible bob weights can be taken up in one length even with the smallest drawn tube dimensions.
  • Pipes are reduced in several passes, for example based on the dimensions 55 x 2.5 mm and a unit weight of 300 kg to 6 x 0.35 mm.
  • the pipes are 5,450 m long.
  • the receiving basket which is filled with a complete length of pipe, is transported from its position below the drawing drum to the discharge station, from where the end of the pipe is fed to the drawing drum as the new beginning of the pipe for the next train, while a new free receiving basket is brought into the receiving station below the drawing drum .
  • several, about six to seven, baskets are on the way and are fed to the drawing drum one after the other.
  • the pulling speed must be reduced, on the one hand so that the last pipe turns do not swing back and forth in the drain basket uncontrollably and the pipe end would whip out of the basket and on the other hand so that the relief shock that arises when the pipe end leaves the drawing ring and the drawing force collapses, is greatly reduced.
  • the maximum achievable drawing speed is currently 1,200 m / min. A reduction of this drawing speed at the end of the train to approx. 60 m / min. is imperative.
  • the lowering of the drive speed when there are only a certain number of turns in the drain basket is carried out by the operator, who has to observe the turns lying in the drain basket by means of one or more mirrors. If there are only a few turns left in the basket, he presses the slow-down button to reduce the speed. The remaining turns are then drawn at the reduced speed for the reasons mentioned above. This activity occupies the operator over part of the drawing time so that he cannot carry out other work.
  • Another known method proposes to mark several turns of the tube behind the drawing ring by means of paint spraying. On the next train, this mark is recognized by sensors and used as a signal to reduce the speed of the drawing drum drive. This method takes advantage of the fact that the beginning of the pipe falling into the receiving basket becomes the end of the pipe on the next train. This method has so far not been successful in practice because there are no suitable marking colors on the market that do. Guarantee visual identification of the pipe end section.
  • the present invention has for its object to develop a method and an apparatus for reducing the pulling speed of drum drawing machines, which can be easily activated by the operator on the first move of each drawing game and then for other moves of this draw game is no longer changed.
  • the method therefore suggests recording the pipe lengths during the first draws of all the pipe bundles and comparing them with the extension of the first pipe bundle after the second train.
  • the constants Q and D that can be calculated from this are used to determine the switchover points for the following pipes of this draft game, without having to intervene again by hand.
  • the corresponding device works, for example, with pulse counters. After storing all lengths (impulses) of all (normally seven bundles of pipes), the operator observes the basket when pulling the first bundle of pipes of the second train and switches manually to low speed when there are only a few turns left in the basket. The impulses are counted and recorded from the start of drawing to the switchover point. In addition, the impulses from the start of drawing to the end of drawing this tube are counted and registered. The quotient Q from the counted pulses from the start of drawing to the end of drawing this drawn tube and the counted pulses to the end of drawing of the tube drawn in the first train is a measure of the extension of the pipe in the second train. The current diameter of the drawing ring and stopper are also taken into account, which also influence the length of the finished pipe.
  • the pulses counted until the switch to low speed are subtracted from the number of pulses which result between the start of pull and the end of pull of the second train.
  • the difference D formed in this way represents a measure of the pipe length which has to be driven at a reduced drawing speed.
  • the switchover points for the following pipes are then calculated.
  • the number of pulses corresponding to the new total pipe length is saved to determine the next switchover points. If a pipe ripper occurs, the automatic switchover is deactivated by pressing a button. When pulling the remainder, the switch to low speed is done by hand.
  • the drawing shows the principle of a continuous drum drawing machine on which the method according to the invention can be carried out.
  • the tube turns, as indicated at 2 are wound in several revolutions in a known manner.
  • a frictional force is thereby achieved which makes it possible to pull the tube 3 through the drawing tool 4 and thereby reduce it.
  • the pipe windings to be drawn lie in the drain basket 5 of the drain station (not shown in more detail), while the reduced, drawn pipe windings are thrown off by the drawing drum 1 into the receiving basket 7 arranged underneath. This is done in that the subsequent pipe coils 2 press the coils already on the drawing drum down so that they fall down when they come out of the area of the pressure roller 6.
  • the receiving basket 7 As soon as the receiving basket 7 is filled with a complete tube length of, for example, 5,000 m, the receiving basket 7 is brought into the drain station and is there to the drain basket 5.
  • the empty drain basket 5 is brought under the drum 1 as the drain basket 7.
  • the end of a drawn tube turn is introduced as the beginning of a new tube to be drawn in the next train in the continuous drum drawing machine, so that a second and in the same way further trains can take place.
  • a measuring device on the drum drawing machine emits a pulse per m tube. With a pipe length of 200 m after the first train, 200 pulses would then be stored.
  • This tube length of 200 mm is called M1.
  • M1 This tube length of 200 mm
  • M3 The total length of this tube is designated M3.
  • the number of pulses is counted from the start of the pull to the end of the pull and saved; this value serves as the basis for the calculation for the next drawing game.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Claims (1)

  1. Procédé pour diminuer la vitesse d'étirage de machines d'étirage à tambour (1), pour des tubes (3) ou analogues, avant la fin de l'étirage d'un tube en anneau, plusieurs tubes en anneau étant étirés les uns après les autres et chacun desdits tubes en anneau étant rassemblé dans un panier de réception (7) après une traction à travers l'outil d'étirage (4), panier de réception qui, à chaque fois, après l'étirage du tube en anneau est transporté pas-à-pas dans un poste de travail, d'où est déclenché un autre de plusieurs processus d'étirage effectués selon le même ordre,
    caractérisé en ce que la longueur (M₁) du tube étiré, de chacun des tubes en anneau se trouvant en circulation, est mesurée et enregistrée, lors du premier étirage, en ce que, lors du deuxième étirage du premier tube en anneau, la vitesse d'étirage est diminuée, manuellement, vers la fin de l'étirage et la longueur (M₂), du tube étiré jusqu'au moment de la diminution, est mesurée et enregistrée, en ce qu'après le deuxième étirage, la longueur totale (M₃) de ce tube est mesurée et enregistrée, en ce que, à partir de la troisième valeur mesurée (M₃) et de la première valeur mesurée (M₁), on forme le quotient Q = M₃ M₁
    Figure imgb0010
     et, à partir de la troisième valeur mesurée (M₃) et de la deuxième valeur mesurée (M₂), on forme la différence D = M₃ - M₂
    Figure imgb0011
     et en ce que, pour les deuxièmes étirages ultérieurs, des longueurs de tubes M'₁ suivantes, la vitesse d'étirage est diminuée, automatiquement, après le passage de la longueur LA du tube étiré, calculée à partir de l'expression suivante : L A = M'₁ x Q - D
    Figure imgb0012
EP90250071A 1990-03-15 1990-03-15 Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours Expired - Lifetime EP0446499B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE90250071T DE59003554D1 (de) 1990-03-15 1990-03-15 Verfahren zur Absenkung der Ziehgeschwindigkeit von Trommelziehmaschinen.
EP90250071A EP0446499B1 (fr) 1990-03-15 1990-03-15 Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours
US07/500,041 US5014531A (en) 1990-03-15 1990-03-27 Method for automatically reducing the drawing speed of a tubular material drawing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90250071A EP0446499B1 (fr) 1990-03-15 1990-03-15 Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours

Publications (2)

Publication Number Publication Date
EP0446499A1 EP0446499A1 (fr) 1991-09-18
EP0446499B1 true EP0446499B1 (fr) 1993-11-18

Family

ID=8205225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250071A Expired - Lifetime EP0446499B1 (fr) 1990-03-15 1990-03-15 Procédé pour abaisser la vitesse d'étirage de machines d'étirage à tambours

Country Status (3)

Country Link
US (1) US5014531A (fr)
EP (1) EP0446499B1 (fr)
DE (1) DE59003554D1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057909A (en) * 1935-05-18 1936-10-20 Cutler Hammer Inc Motor controller
GB1151523A (en) * 1965-09-20 1969-05-07 Marshall Richards Machine Comp Improvements in and relating to Tube Drawing Machines
US3337154A (en) * 1966-02-16 1967-08-22 Westinghouse Electric Corp Motor control system for coiling apparatus
US3539085A (en) * 1968-06-11 1970-11-10 Web Press Eng Inc Web control system
US3593558A (en) * 1969-07-24 1971-07-20 Fenn Mfg Co The Payoff reel controller
DE2132408C3 (de) * 1971-06-30 1982-03-11 Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn Anordnung zur Beeinflussung der Drehzahl der Elektromotoren der Einzelantriebe einer Mehrfachziehanlage
DE3233237C1 (de) * 1982-09-03 1984-03-15 Mannesmann AG, 4000 Düsseldorf Einrichtung zum automatischen Regeln der Geschwindigkeit des Ablaufkorbes einer Kontitrommelziehmaschine
DE3708859C1 (de) * 1987-03-17 1988-06-01 Mannesmann Ag Verfahren und Vorrichtung zur Durchfuehrung des Verfahrens zur automatischen Drehzahlsteuerung einer Konti-Trommelziehmaschine fuer Rohre oder dergleichen
DE3725511C1 (fr) * 1987-07-29 1988-03-10 Mannesmann Ag, 4000 Duesseldorf, De

Also Published As

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US5014531A (en) 1991-05-14
DE59003554D1 (de) 1993-12-23
EP0446499A1 (fr) 1991-09-18

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