EP3212344B1 - Wiredrawing line for wiredrawing a metal wire, wire rod or strip - Google Patents

Wiredrawing line for wiredrawing a metal wire, wire rod or strip Download PDF

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Publication number
EP3212344B1
EP3212344B1 EP15805265.4A EP15805265A EP3212344B1 EP 3212344 B1 EP3212344 B1 EP 3212344B1 EP 15805265 A EP15805265 A EP 15805265A EP 3212344 B1 EP3212344 B1 EP 3212344B1
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EP
European Patent Office
Prior art keywords
wiredrawing
drives
line
machine
motors
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EP15805265.4A
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German (de)
English (en)
French (fr)
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EP3212344A1 (en
Inventor
Artemio Affaticati
Enrico Conte
Roberto Conte
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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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/20—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes from stock of essentially unlimited length

Definitions

  • the present invention relates to a wiredrawing line for wiredrawing a metal wire, wire rod or strip.
  • a wiredrawing line typically comprises, in the following order, a wiredrawing machine, which is designed to carry out a constant-volume deformation on a metal wire by drawing it through a sequence of dies in order to obtain a wire with a smaller cross-section, an annealing furnace, which carries out a thermal treatment on the hard-drawn wire delivered by the wiredrawing machine in order to recover at least part of the resistance and ductility features of the metal making up the wire, and a spooler to wind the annealed wire around a spool.
  • the annealing furnace is absent or not used, so as to obtain, at the end of the process, spools with a simple hard-drawn wire.
  • the wiredrawing line is a multi-wire line, then it comprises different spoolers provided with respective spools or it comprises a collection creel comprising different spools.
  • the wiredrawing machine comprises a plurality of drawing rings and the annealing furnace comprises a plurality of idler rollers and at least one drawing ring.
  • the drawing rings, the spools of the spooler and, if provided, the idler rollers are moved, by means of suitable transmission systems, by induction motors. Each one of these motors is controlled by a respective drive. If the wiredrawing line is used to draw wires with a large diameter, the motors coupled with the drawing rings have a great power, for example up to 80 KW and, as a consequence, the relative drives are large and dissipate a lot of heat.
  • all drives are housed in one single box arranged on the outside of the wiredrawing line, namely resting on the ground close to the wiredrawing line.
  • the drives comprise respective DC/AC inverters, which are supplied with power by a power supply means housed in the external box.
  • Each drive is connected to the respective motor by means of a respective shielded power cable.
  • the presence of the external box has clear drawbacks.
  • the external box has a large imprint on the ground, which complicates the logistics of the site where the wire drawing line is installed.
  • the power cables are very long (namely, different metres long), so as to cause power losses and, in the special case of use of AC motors, remarkable electromagnetic troubles.
  • the existence of the external box which must be installed separately from the other parts of the wiredrawing line, increases building and installation costs of the entire line, as suitable channels or conduits must be built and installed in order to allow the cables to go from the external box to the wiredrawing line.
  • the object of the present invention is to provide a wiredrawing line having an electric architecture that is not affected by the aforementioned drawbacks and, at the same time, can be obtained in a simple and low-cost manner.
  • number 1 generically indicates, as a whole, a multi-wire wiredrawing line according to the present invention.
  • the wiredrawing line 1 comprises, arranged in the following order according to a wiredrawing direction T, a multi-wire wiredrawing machine 2, which receives a plurality of metal wires and carries out a wiredrawing thereof so as to reduce their cross-section, an annealing furnace 3, which receives hard-drawn wires from the wiredrawing machine 2 and carries out a direct current resistance annealing of the wires, and a spooler 4, which is designed to wind the annealed wires in respective spools.
  • the annealing furnace 3 comprises a control board 5, which houses known electric apparatuses used to generate the so-called annealing voltage.
  • the wiredrawing line 1 is shown not in use, namely it is shown without raw wires at the input of the wiredrawing machine 2 and without the annealed wires at the output 3a ( figure 1 ) of the annealing furnace 3, namely at the inlet 4a ( figure 2 ) of the spooler 4.
  • the wiredrawing machine 2 comprises a plurality of drawing rings 6 ( figure 1 ), which rotate in a synchronized manner so as to draw the wires through a plurality of dies 7.
  • the drawing rings 6 are caused to rotate by one or more induction motors 8 (in the example of figure 1 there are three of them) by means of a gear transmission system, which is known per se and, therefore, it is not shown in the figures.
  • Part of each one of the motors 8 projects from a rear side 12 of the wiredrawing machine 2, namely from a side that is substantially parallel to the wiredrawing direction T, so as not to change the imprint of the wiredrawing machine 2 on the ground.
  • the annealing furnace 3 and the spooler 4 comprise respective protection casings 9 and 10.
  • the control board 5 is mounted on a lateral wall 11 of the protection casing 9, namely on a wall that is transverse to the wiredrawing direction T, so as not to change the imprint of the wiredrawing line 1 on the ground transversely to the wiredrawing direction T.
  • the annealing furnace 3 comprises, housed on the inside of its protection casing, two idler rollers 13, a drawing ring 14 and three induction motors 15, which are designed to cause the rotation of a respective one of said idler rollers 13 and drawing ring 14.
  • the control board 5 houses a power supply stage 16, which is of a known type and is designed to turn a three-phase voltage Uac provided by a three-phase source 17 into a direct current intermediate-volt voltage Udc, and subsequent voltage transformation stages, which are known per se and are indicated, as a whole, with number 18, to turn the intermediate voltage Udc into a direct current low-volt voltage Uann to be applied to the wire for its annealing.
  • the intermediate voltage Udc has an amplitude ranging from 500 to 1000 V.
  • the annealing voltage Uann has an amplitude that can be modulated in a known manner in an interval ranging from 0 to 110 V.
  • the maximum level of the annealing voltage Uann depends on the type of metal of the wires to be annealed, on the geometry of the annealing furnace 3 and on the maximum feeding speed of the wires in the wiredrawing line 1.
  • the spooler 4 comprises, housed on the inside of its protection casing 10, a plurality of spools 19, only two of them being shown in the figure for the sake of simplicity, and a plurality of induction motors 20, each designed to cause the rotation of a respective spool 19.
  • the motors 8, 15 and 20 are controlled by respective drives 21, 22 and 23, each one of them being of the type comprising at least one DC/AC inverter.
  • the drives 21, 22 and 23 are mounted on board the wiredrawing line 1 - in particular on board the respective motors 8, 15 and 20 - and are supplied with power by a single direct current voltage bus, or simply DC bus 24 ( figure 3 ), which is connected to the output of the power supply stage 16 and is mounted along - and on board - the wiredrawing line 1 so as to be able to reach all the drives 21-23.
  • Figure 2 only shows the motors 8 and the drives 21 of the wiredrawing machine 2.
  • the DC bus 24 comprises a first part mounted along the wiredrawing machine 2, a second part mounted along the annealing furnace 3 and a third part mounted along the spooler 4.
  • the power cables (not shown) connecting the drives 21, 22 and 23 to the respective motors 8, 15 and 20 are very short and do not need a special shielding.
  • the drives 21-23 are controlled, by means of a communication bus 25 mounted along - and on board - the wiredrawing line 1, by a control unit 26, which is mounted inside the control board 5 of the annealing furnace 3.
  • the overall imprint of the wiredrawing line 1 on the ground, in a direction that is transverse to the wiredrawing direction T, is basically defined by the depth of the annealing furnace 3 ( figure 2 ).
  • the drives 21-23 are, for example, of the type sold by Siemens under the name SINAMICS G120D.
  • control unit 26 is mounted inside the so-called control pulpit of the wiredrawing line 1, namely the human-machine interface device that allows an operator to interact with the wiredrawing line 1 (for example to give start and stop orders) and is typically installed on a pedestal resting on the ground or an a hanging arm that is fixed to the frame of the wiredrawing machine 2 or of the annealing furnace 3.
  • each motor 8, 15, 20 is liquid-cooled and the respective drive 21, 22, 23 has an outer casing that is integrated with the one of the motor 8, 15, 20 so as to use the same cooling circuit.
  • the drives 21 are housed in a small box 27 mounted on the rear side of the wiredrawing machine 2, next to the motors 8 ( figure 4 ), the drives 22 are housed in the control board 5 and the drives 23 are housed in a further small box 28 mounted on a rear wall 29 of the protection casing 10 at a given height from the ground ( figure 4 ).
  • the DC bus 24 partially extends inside the control board 5 and the boxes 27 and 28.
  • the position in which the boxes 27 and 28 are installed requires them to have a degree of protection at least of level IP54.
  • the power cables (not shown) connecting the drives 21, 22 and 23 to the respective motors 8, 15 and 20 are longer than the ones of the embodiment of figures 1-3 .
  • the box 27 is shaped so as not to project from the rear side 12 more than the motors 8 do.
  • the base 30 of the spooler 4 normally is deeper, transversely to the wiredrawing direction T, than the upper part of the protection casing 10 where the rear wall 29 is located; the box 28 is shaped so as to remain within the depth of the base 30. Therefore, the imprint of the wiredrawing line 1 on the ground is not influenced by the presence of the boxes 27 and 28.
  • the main advantage of the wiredrawing line 1 described above is that of having a definitely smaller imprint on the ground compared to the existing lines with the same production capacity, since the drives of the motors are mounted on board the wiredrawing line and, therefore, there is no need for external boxes resting on the ground and used to hold the drives themselves.
  • the wiredrawing line comprises an annealing furnace with the relative control board
  • the direct current intermediate-volt voltage generated inside the control board can be used to supply power to the inverters of the drives, by means of a direct current bus running along the wiredrawing line 1.
  • the presence of the drives on board the wiredrawing line allows a significant reduction in the length of the cables connecting the drives and the motors, especially in case the drives are directly mounted on the respective motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Metal Extraction Processes (AREA)
EP15805265.4A 2014-10-27 2015-10-27 Wiredrawing line for wiredrawing a metal wire, wire rod or strip Active EP3212344B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO20140598 2014-10-27
PCT/IB2015/058281 WO2016067201A1 (en) 2014-10-27 2015-10-27 Wiredrawing line for wiredrawing a metal wire, wire rod or strap

Publications (2)

Publication Number Publication Date
EP3212344A1 EP3212344A1 (en) 2017-09-06
EP3212344B1 true EP3212344B1 (en) 2020-12-02

Family

ID=51951860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15805265.4A Active EP3212344B1 (en) 2014-10-27 2015-10-27 Wiredrawing line for wiredrawing a metal wire, wire rod or strip

Country Status (3)

Country Link
EP (1) EP3212344B1 (zh)
CN (1) CN107206445B (zh)
WO (1) WO2016067201A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109967541A (zh) * 2019-05-05 2019-07-05 郭永祥 一种适用于电缆内部铜丝拉丝的加工装置
CN114632830B (zh) * 2022-03-04 2023-07-25 盐城市星凯环保科技股份有限公司 一种电热合金材料用自动拉丝纺丝设备
CN116511269B (zh) * 2023-04-18 2023-12-12 浙江明铖金属科技股份有限公司 一种紧固件拉丝工序用拉丝机及其拉丝工艺

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Publication number Priority date Publication date Assignee Title
DE29900994U1 (de) * 1999-01-21 1999-05-06 Henrich Gmbh, 35745 Herborn Anlage zur kontinuierlichen Herstellung von mehrdrähtigem Stranggut
CN2621846Y (zh) * 2003-04-09 2004-06-30 上海金东线缆设备有限公司 一种8头为单元的连续退火拉丝机
DE102006017671B4 (de) * 2006-04-12 2015-05-28 Ernst Koch Gmbh & Co Kg Drahtziehvorrichtung
CN201030483Y (zh) * 2007-04-12 2008-03-05 郑州恒杰实业有限公司 拉丝、退火、收丝智能联合设备机组
CN102059263A (zh) * 2010-12-03 2011-05-18 赵义敏 一种拉丝机控制***
JP5363598B2 (ja) * 2011-04-07 2013-12-11 ファナック株式会社 直流交流変換装置を接続可能なモータ駆動制御装置
CN102489533B (zh) * 2011-12-04 2013-08-14 西北有色金属研究院 一种MgB2线材的电塑性拉拔装置及拉拔方法
AT512676B1 (de) * 2012-03-23 2021-03-15 Steinklauber Ind & Vermoegensverwaltung Gmbh Drahtziehvorrichtung
CN203470504U (zh) * 2013-09-04 2014-03-12 江阴华电新材料有限公司 一种铜线拉丝退火一体机

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
EP3212344A1 (en) 2017-09-06
WO2016067201A1 (en) 2016-05-06
CN107206445A (zh) 2017-09-26
CN107206445B (zh) 2019-03-08

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