WO2017145084A1 - Machine d'étirage et procédé d'étirage - Google Patents

Machine d'étirage et procédé d'étirage Download PDF

Info

Publication number
WO2017145084A1
WO2017145084A1 PCT/IB2017/051035 IB2017051035W WO2017145084A1 WO 2017145084 A1 WO2017145084 A1 WO 2017145084A1 IB 2017051035 W IB2017051035 W IB 2017051035W WO 2017145084 A1 WO2017145084 A1 WO 2017145084A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
capstan
speed
pulling
machine
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/IB2017/051035
Other languages
English (en)
Inventor
Mario BEAUPAIN
Fabio ZANROSSO
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.)
Zt Srl
Original Assignee
Zt Srl
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 Zt Srl filed Critical Zt Srl
Publication of WO2017145084A1 publication Critical patent/WO2017145084A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
    • B21C1/08—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series in which the material does not slip on the drums

Definitions

  • the present invention regards a machine for drawing metal wires and a method for drawing a metal wire.
  • drawing is a process that consists in pulling a metal wire through a succession of matrices, called dies, with progressively decreasing section to reduce the diameter of the wire to a predefined value.
  • the dies are alternated with pulling capstans around which the wire is wound and which are driven in rotation to drag the wire in question.
  • the feedback system comprises a dancer device arranged between each capstan and the die immediately downstream and it comprises two idle pulleys with variable distance between centres and around which the wire is loop- wound and which are forced to move away from each other so as to maintain the wire tensioned.
  • a change of the speed of the wire tends to change the tension thereof and thus changes the distance between the two pulleys, which is detected by a sensor.
  • a control system connected to the sensor adjusts the speed of the corresponding capstan so as to stabilise the pulleys around a new balanced position.
  • the aforementioned feedback system has the sure advantage of absorbing the speed change of the wire until the speed of the capstan adjusts suitably.
  • the feedback system described above reveals the drawback of not eliminating the sliding of the wire in the direction of the axis of the capstan, due to the fact that the entry point and exit point of the wire wound around each capstan are arranged on different planes, between which the turns of the wire are required to move during the advancement.
  • the axial sliding reveals the drawback of creating unwanted marks on the wire, reducing the quality of the product, and leading to an early wear of the capstans.
  • the axial sliding is particularly marked in the so-called “dry” machines, in which the wire is cooled by contact between the latter and the capstan and they thus require a high number of turns around each capstan to guarantee a sufficient contact surface.
  • a fixed axis idle pulley alongside each capstan, which serves for detaching the turns, is known to be used in an effort to eliminate the axial sliding.
  • the wire is wound for a portion of a turn around the capstan, thus around the aforementioned pulley and lastly around a capstan for a further turn portion.
  • the axis of the pulley is inclined with respect to the capstan axis so as to divert the wire from the first turn portion to the second turn portion in the direction of the capstan axis so as to eliminate the axial sliding.
  • the feedback system described above is particularly suitable for the so-called "oil bath” machines, in which the removal of heat from the wire is guaranteed by the presence of oil and which, thus, require a limited number of wire turns around each capstan.
  • the idle pulley may be coupled to a speed transducer to measure the speed of the wire, enabling avoiding the use of the dancer and directly adjusting the speed of the capstans depending on the speed of the wire, so as to avoid tangential sliding.
  • An object of the present invention is to overcome all the aforementioned drawbacks of the prior art.
  • an object of the invention is to provide a drawing machine that enables eliminating the tangential sliding of the wire on the capstans.
  • Another object of the present invention is to provide a machine that also enables eliminating the axial sliding.
  • Another object of the invention is to provide a machine having a limited construction complexity.
  • the reduction of the sliding of the wire on the capstan enables reducing the machining defects of the wire with respect to what can be obtained with the prior art machines, obtaining a higher quality product.
  • FIG. 1 schematically represents a drawing machine according to the invention, in front view
  • - fig. 2 represents an enlarged detail of fig. 1 , showing a pulling capstan and the relative wire tensioning means;
  • - fig. 3 represents the detail of fig. 1 , in lateral view.
  • the metal wires drawing machine of the invention is indicated in its entirety in fig. 1 with reference 1.
  • the machine 1 comprises a drawing line consisting in a succession of pulling capstans 2 around which a wire W is wound and between which corresponding dies 3 are interposed.
  • Each capstan 2 is associated to drive means for the rotation thereof, not represented but per se known, so as to pull the wire W through the die 3 arranged immediately upstream according to the advancement direction Z of the wire.
  • the dies 3 have respective passage sections decreasing along the drawing line so that, upon passing through each die 3, the wire W is subjected to a corresponding reduction of the section.
  • the machine 1 also comprises a pilot capstan 11 arranged downstream of the aforementioned succession of pulling capstans 2 and associated to drive means, also not represented but per se known, for the rotation thereof at a pre-settable fixed speed, which determines the advancement conditions of the wire W through the drawing line.
  • Elastically yieldable means 4 for tensioning the wire W suitable to tension the wire W in a portion at contact with a first pulling capstan 2 with a tensioning force, are also present.
  • the aforementioned tensioning means 4 are capable of temporarily absorbing the speed changes of the wire W modifying the geometric configuration thereof and maintaining the wire tensioned.
  • control means that act on the drive means to adjust the rotation speed of the first pulling capstan 2 in response to the change of the aforementioned geometric configuration of the tensioning means 4, are also present.
  • control means are configured to increase or reduce the rotation speed of the first pulling capstan 2 following a movement of the tensioning means 4 corresponding to an increase or, respectively, a reduction of the speed of the wire W.
  • control means enable the adjustment of the speed of the first pulling capstan 2 to adapt it to the actual speed of the wire W, which may change due to the dimensional tolerances of the die 3 and the wire W and the wear of the die 3.
  • a sensor unit that determines the peripheral speed of the first pulling capstan 2 and the advancement speed of the aforementioned portion of the wire W, is present.
  • An adjustment system also not represented but per se known, that increases the tensioning force of the tensioning means 4 upon detecting a difference between the advancement speed of the wire W and the peripheral speed of the first capstan 2, a sign of the presence of tangential sliding of the wire on the first capstan, is also present.
  • the increase of the tensioning force increases the friction of the wire W on the first pulling capstan 2 so as to eliminate the tangential sliding.
  • the aforementioned adjustment means enable adjusting the tensioning force of the wire W to the drawing conditions, thus avoiding having to manually set it at a predefined value.
  • a manually set value could be insufficient and cause the tangential sliding of the wire W on the first pulling capstan 2, or it could be excessive and subject the wire W to excessive tension.
  • the invention enables adapting the tensioning force to the drawing conditions, maintaining it at the minimum value compatible with absence of tangential sliding.
  • the tensioning means 4 comprise a first idle pulley 5 which receives the wire W exiting from the first pulling capstan 2, which is rotatably associated to mobile support means 7.
  • the aforementioned mobile support means 7 are configured to enable the movement of the first pulley 5 in a displacement direction Y orthogonal to the rotation axis X of the first pulling capstan 2.
  • Figures 1 and 2 represent the two extreme positions that the first pulley 5 may take, in which the upper position is obtained when the support means 7 are arranged in the position represented with a solid line and the lower position is obtained when the support means 7 are arranged in the position represented with a dashed line.
  • a tensioner device 9 suitable to exert - on the first pulley 5 - the direct tensioning force according to the aforementioned displacement direction Y is also present.
  • a first advantage lies in the fact that the first pulley 5 is directly driven in rotation by the wire W and, thus, it can also be used for measuring the advancement speed of the wire, hence limiting the number of components of the machine 1.
  • the aforementioned speed measurement is preferably carried out through a means for detecting the angular speed of the first pulley 5, preferably an encoder, belonging to the sensor unit.
  • the comparison between the latter speed and the peripheral speed of the first capstan 2 must be carried out at a constant rotation speed of the capstan 2, i.e. not during the speed adjustment steps.
  • a speed change of the first capstan 2 depends on the movement of the axis of the first pulley 5 and, thus, the speed of the wire W detected by the latter is definitely different from the peripheral speed of the first capstan 2, though in absence of tangential sliding.
  • a constant rotation speed of the first capstan 2 corresponds to a stable position of the first pulley 5 and, thus, a difference between the peripheral speed of the first capstan and the one detected for the wire W is a sign of the presence of tangential sliding.
  • a second advantage related to the use of the aforementioned first pulley 5 lies in enabling to eliminate the axial sliding of the wire W.
  • the first pulley 5 has an inclined rotation axis with respect to the axis X of the first capstan 2 and the wire W is arranged so as to perform, in the following order: a first turn portion around the first capstan 2; a revolution portion around the inclined pulley; a second turn portion around the first capstan 2.
  • the machine 1 also comprises a second idle pulley 6, coaxial to the aforementioned first pulley 5.
  • the aforementioned second pulley 6 enables winding the wire W for a third turn portion around the first capstan 2, so as to enhance the pulling efficiency of the capstan reducing the relative tension on the wire W.
  • the second pulley 6 is rotatably released from the first pulley 5, so that the two pulleys can rotate at different speeds to adapt to possible speed differences between the respective wire portions, that may occur in particular operative conditions.
  • the means 7 for supporting the first idle pulley 5 preferably comprise an oscillating arm 8 provided with a free end on which the first pulley 5, the possible second idle pulley 6 and further idle pulleys, if present, are fitted.
  • the tensioner device 9 preferably comprises a pneumatic cylinder 10 associated to the oscillating arm 8.
  • the aforementioned sensor means preferably comprise a cam associated to the end of the aforementioned oscillating arm 8 opposite to the free end and to which there is faced a sensor that detects the radial overall dimension of the cam so as to determine the angular position thereof.
  • the control means command the increase or reduction of the rotation speed of the first pulling capstan 2 depending on whether the sensor means detect a displacement of the first pulley 5 in the opposite direction or, respectively, in the same direction as the tensioning force.
  • first pulling capstan 2 especially as concerns the means 4 for tensioning the wire W, control means, a sensor unit and a system for adjusting the tensioning force, may be similarly applied to each pulling capstan of the machine 1.
  • the machine 1 described above also comprises a system for cooling the wire W which, preferably, provides for the at least partial immersion of the pulling capstans 2 and the dies 3 in a lubricating substance.
  • the aforementioned lubricating substance enables efficiently cooling the wire W even if it forms a small number of turns around each capstan 2 and, thus, the heat exchange surface between the wire and the capstans is small.
  • embodiments of the invention may provide for a different system for cooling the wire W with respect to the one described above.
  • the sensor means detect the aforementioned displacement and command the increase of speed of the first capstan 2, until the first pulley 5 reaches a stable position, a sign of successful adjustment of the speed of the first capstan 2 and the advancement speed of the wire W.
  • the present invention also regards a method for drawing a metal wire W that provides for winding the wire W around a pulling capstan 2 and driving the latter in rotation so as to advance the wire W through a die 3 arranged upstream of the capstan.
  • a portion of the wire W at contact with the pulling capstan 2 is tensioned with a predefined tensioning force so as to generate - between the wire and the capstan - a friction sufficient to enable the transmission of the pulling force.
  • the method also provides for adjusting the rotation speed of the pulling capstan 2 in response to the speed change of the wire, increasing it upon the increase of the speed of the wire W and vice versa.
  • the aforementioned tensioning force is increased upon detecting a difference between the advancement speed of the wire W exiting from the capstan and the peripheral speed of the latter.
  • the method described above enables adapting the tensioning force to any drawing condition, adjusting it to the minimum value compatible with absence of tangential sliding.
  • the method preferably provides for an operation for setting the tensioning force to a value suitable to produce a given initial sliding, so as to force the aforementioned adjustment.
  • the setting operation described above averts the possibility of setting a tensioning force higher than the strictly required one.
  • the adjustment of the tensioning force of the wire in response to the change of drawing conditions enables maintaining the tension of the wire and, thus, the friction of the latter on each capstan, at the minimum value sufficient to guarantee the absence of tangential sliding.
  • idle pulleys coupled to the capstans having inclined axes with respect to the rotation axis of the latter, also enables eliminating the axial sliding of the wire.

Landscapes

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

Abstract

On décrit une machine d'étirage (1) comprenant des cabestans (2) pour tirer un câble métallique (W) disposé en succession et en alternance avec des matrices (3); un tendeur (4) à déformation élastique pour appliquer une force de tension à une première partie du câble (W) en contact avec un premier cabestan (2); un moyen pour régler la vitesse de rotation du premier cabestan (2) en réaction à la modification de la configuration géométrique du tendeur (4); un capteur pour mesurer la vitesse périphérique du premier cabestan (2) et la vitesse d'avancement du câble (W) dans la première partie; un système de réglage qui augmente la force de tension lorsqu'un écart est détecté entre la vitesse d'avancement et la vitesse périphérique. L'invention concerne également un procédé d'étirage d'un câble métallique.
PCT/IB2017/051035 2016-02-25 2017-02-23 Machine d'étirage et procédé d'étirage Ceased WO2017145084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2016A001051A ITUB20161051A1 (it) 2016-02-25 2016-02-25 Macchina trafilatrice e metodo di trafilatura
IT102016000019739 2016-02-25

Publications (1)

Publication Number Publication Date
WO2017145084A1 true WO2017145084A1 (fr) 2017-08-31

Family

ID=56084254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/051035 Ceased WO2017145084A1 (fr) 2016-02-25 2017-02-23 Machine d'étirage et procédé d'étirage

Country Status (2)

Country Link
IT (1) ITUB20161051A1 (fr)
WO (1) WO2017145084A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109317526A (zh) * 2018-12-11 2019-02-12 珠海桑贝思精密科技有限公司 拉丝装置和拉丝机
CN112718898A (zh) * 2021-01-21 2021-04-30 江苏鑫旺新材料科技有限公司 一种金属拉丝生产用可调式拉丝辊轴
CN115673008A (zh) * 2022-10-26 2023-02-03 无锡三麟精密金属制品有限公司 一种拉力实时监控的钨丝加工拉伸机组
CN118455286A (zh) * 2024-07-12 2024-08-09 江苏华申申龙纺织集团有限公司 一种避免纺织线断裂的纺织线牵引装置及方法
CN118558757A (zh) * 2024-06-20 2024-08-30 中天钢铁集团(淮安)新材料有限公司 一种具有在线张力检测装置的拉丝机及换模方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118950729A (zh) * 2024-10-21 2024-11-15 崇义章源钨业股份有限公司 一种用于控制钨丝放丝速度的装置及采用其的钨丝拉丝方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR660100A (fr) * 1928-02-18 1929-07-06 Gerhardi W Machine multiple à étirer le fil métallique
GB539588A (en) * 1940-03-15 1941-09-17 Harold John Lloyd Improvements in wire drawing machines
CA712892A (en) * 1965-07-06 P. Norton Charles Wire drawing machines
US4079609A (en) * 1976-12-14 1978-03-21 Amtel, Inc. Control system for multiple stage reducing apparatus
EP0673689A1 (fr) * 1994-03-25 1995-09-27 S.A.M.P. S.p.A. Meccanica di Precisione Machine à tréfiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA712892A (en) * 1965-07-06 P. Norton Charles Wire drawing machines
FR660100A (fr) * 1928-02-18 1929-07-06 Gerhardi W Machine multiple à étirer le fil métallique
GB539588A (en) * 1940-03-15 1941-09-17 Harold John Lloyd Improvements in wire drawing machines
US4079609A (en) * 1976-12-14 1978-03-21 Amtel, Inc. Control system for multiple stage reducing apparatus
EP0673689A1 (fr) * 1994-03-25 1995-09-27 S.A.M.P. S.p.A. Meccanica di Precisione Machine à tréfiler

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109317526A (zh) * 2018-12-11 2019-02-12 珠海桑贝思精密科技有限公司 拉丝装置和拉丝机
CN112718898A (zh) * 2021-01-21 2021-04-30 江苏鑫旺新材料科技有限公司 一种金属拉丝生产用可调式拉丝辊轴
CN115673008A (zh) * 2022-10-26 2023-02-03 无锡三麟精密金属制品有限公司 一种拉力实时监控的钨丝加工拉伸机组
CN115673008B (zh) * 2022-10-26 2024-02-13 无锡凌意精密金属制品有限公司 一种拉力实时监控的钨丝加工拉伸机组
CN118558757A (zh) * 2024-06-20 2024-08-30 中天钢铁集团(淮安)新材料有限公司 一种具有在线张力检测装置的拉丝机及换模方法
CN118455286A (zh) * 2024-07-12 2024-08-09 江苏华申申龙纺织集团有限公司 一种避免纺织线断裂的纺织线牵引装置及方法

Also Published As

Publication number Publication date
ITUB20161051A1 (it) 2017-08-25

Similar Documents

Publication Publication Date Title
WO2017145084A1 (fr) Machine d'étirage et procédé d'étirage
US6874724B2 (en) Method and device for reeling up in the proper position a hot-rolled strip in a reeling installation
US10576521B2 (en) Roll feeder and coilded material conveyance method
CN103787148B (zh) 一种电缆绕线的输送张力自动调节装置
EP3689801B1 (fr) Appareil d'enroulement de déchets vierges pour papier d'étiquettes continu
WO2016175083A1 (fr) Dispositif d'enroulement de tige de fil métallique
CN113353695B (zh) 高速收卷机卷轴调速装置
EP1068920B1 (fr) Scie a fil
GB2245087A (en) Wire feeding and measuring apparatus.
CN111606130A (zh) 一种用于钢丝预应力模具的变张力缠绕装置
US20010002561A1 (en) Wire saw apparatus and method
KR100314840B1 (ko) 열연권취기의 스트립 미단 자동정지 제어방법
EP2134481B1 (fr) Rouleau d'étirage à double pivot
JP2016097479A (ja) 切断装置
US6018975A (en) Multipass wiredrawing machine with wire tension control device
CN108415134B (zh) 调整套管放线张力的方法及主控系统
US11504755B2 (en) Device and method for transporting strip material, in particular a hot strip
KR102131335B1 (ko) 가공 정밀도 향상을 위한 노칭 시스템
KR101675813B1 (ko) 보조 가이드를 이용한 권폭조정장치
US20170326776A1 (en) Film-making machine for producing stretch film
CN108436724B (zh) 线状锯及线状锯的运转方法
CN103889726B (zh) 用于将至少一个材料带拉入加工设备的方法
JP7076884B2 (ja) 走行する金属ストリップの横方向のストリップ輪郭またはストリップ縁部の位置を確認するための方法および装置
KR100700386B1 (ko) 선재(線材) 어큐므레이터
JPS60231516A (ja) ル−パ機構を有する巻取機

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17717224

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17717224

Country of ref document: EP

Kind code of ref document: A1