EP1101545A2 - Machine a tréfiler - Google Patents

Machine a tréfiler Download PDF

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Publication number
EP1101545A2
EP1101545A2 EP00124359A EP00124359A EP1101545A2 EP 1101545 A2 EP1101545 A2 EP 1101545A2 EP 00124359 A EP00124359 A EP 00124359A EP 00124359 A EP00124359 A EP 00124359A EP 1101545 A2 EP1101545 A2 EP 1101545A2
Authority
EP
European Patent Office
Prior art keywords
drawing machine
wire drawing
machine according
capstans
traction
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Withdrawn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
EP00124359A
Other languages
German (de)
English (en)
Other versions
EP1101545A3 (fr
Inventor
Boris Filipovic
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.)
Tecnocard Srl
Original Assignee
Tecnocard 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 Tecnocard Srl filed Critical Tecnocard Srl
Publication of EP1101545A2 publication Critical patent/EP1101545A2/fr
Publication of EP1101545A3 publication Critical patent/EP1101545A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms

Definitions

  • the present invention relates to a wire drawing machine of the multiple-pass type.
  • These machines are constituted by a wet section, in which both the wire handling mechanism and the wire being drawn are immersed in a fluid, and by a so-called dry section, in which the mechanical part is dry while the drawn wire moves at a speed which entrains around it the fluid contained in the wet section.
  • the wet section comprises a succession of dies, through which a metal wire is passed, gradually reducing its cross-section to a chosen and preset value.
  • the number of dies is linked to the total reduction in cross-section that the wire must undergo, owing to the fact that depending on the material of which it is made it cannot undergo, in a same pass, a reduction in cross-section by more than a certain percentage.
  • the dies are arranged parallel to each other and are interposed between groups of drawing capstans.
  • the capstans of each group increase in diameter as the wire decreases in cross-section, with consequent elongations.
  • the dies are subject to inevitable wear due to the passage of the wire; therefore, in order to compensate for the increase in the cross-section of the wire with respect to the intended value and for the reduction of the output speed of the wire, the capstans are provided with a certain taper.
  • the taper with which the capstans are provided is in fact sufficient to compensate for the variations in the speed of the wire in output from the dies only within narrow limits.
  • the aim of the present invention is to provide a wire drawing machine which eliminates or substantially reduces the drawbacks of the prior art.
  • a consequent primary object of the present invention is to provide a wire drawing machine which allows to compensate for variations in the speed of the wire during drawing.
  • Another important object is to provide a wire drawing machine which allows on-line evaluation of the state of wear of the dies.
  • Another object is to provide a wire drawing machine which allows to evaluate, and possibly eliminate, slippage of the wire on the capstan.
  • Another object is to provide a wire drawing machine which allows to provide step synchronization even with an advanced state of wear of the dies.
  • a further object is to provide a wire drawing machine which allows a better qualitative result than current ones.
  • a still further object is to provide a wire drawing machine which can be manufactured with conventional equipment and systems.
  • a wire drawing machine of the multiple-pass type comprising successions of dies and means for subjecting to traction and guiding the wire being drawn, characterized in that said traction and guiding means comprise a plurality of capstans which are rigidly coupled to corresponding coaxial hollow shafts which are provided with kinematically independent rotary motions, said shafts being arranged one inside the other.
  • a wire drawing machine according to the invention, particularly the wet section, is generally designated by the reference numeral 10.
  • the machine 10 comprises a succession of dies 28 of a per se known type which are arranged between two pairs of traction means 11a and guiding means 11b which are arranged in operating succession.
  • the traction means 11a and the guiding means 11b have, as a whole, the same structure.
  • the traction means 11a is constituted by a tubular support 12 which is fixed to a frame 13 and inside which a plurality of hollow shafts, generally designated by the reference numeral 15 and arranged inside each other, rotate independently, being supported by rolling bearings 14 which are arranged between the shafts 15.
  • the innermost shaft 15a the only one that is not hollow since it does not have to contain any other shaft, rigidly supports, at its ends, a capstan 16a and a wheel 17a which is shaped complementarily to a transmission belt 18a.
  • the wheel 17a in turn rigidly and circumferentially supports a reading disk 19a for transducers which are not shown in the figure.
  • the shaft 15a is, as mentioned, contained in a series of hollow shafts, generally designated by the reference numeral 15b, which can rotate independently.
  • the hollow shafts 15b are advantageously provided with radial through holes 26 which allow the passage of lubricating oil for bearings inside the tubular interspaces 27.
  • the hollow shafts 15b have axial overall dimensions which gradually decrease from the shaft that is adjacent to the shaft 15a to the shaft that is adjacent to the tubular support 12.
  • the hollow shafts 15b too can rigidly support, at their ends, capstans, generally designated by the reference numeral 16b, and wheels, generally designated by the reference numeral 17b, which are shaped complementarily to transmission belts 18b and rigidly and circumferentially support reading disks 19b for transducers.
  • the reading disks 19b circumferentially support a plurality of equidistant teeth which allow transducers, advantageously of the type known commercially as proximity and not shown in the figure, to read the angular movements of the disks 19b.
  • the traction means 11a and the guiding means 11b are thus provided with a plurality of adjacent capstans 16 which can rotate independently.
  • the capstans 16 of each traction means 11a and guiding means 11b substantially have the same dimensions and a wire winding surface 20 which tapers slightly.
  • the main purpose of such taper is to make the wire 23 arrange itself at right angles to the capstans 16, allowing its correct winding; it is also designed to compensate for small speed variations of the wire 23.
  • the difference between the traction means 11a and the guiding means 11b lies in that the guiding means 11b, by being free, do not require the wheels 17b that are adapted to couple, by means of the belts 18, to the electric motors 22, and thus bear the reading disks 19 keyed directly onto the shafts 15.
  • the capstans 16, each of which is substantially constituted by a hollow cylinder having a slightly tapering surface, are rigidly coupled to their corresponding shafts 15 by means of disks 21.
  • each belt 18 is meant to connect an electric motor 22.
  • the wire 23, which enters the wet part of the drawing machine 10, is alternately wound by the capstans 16 of the guiding means 11b and traction means 11a.
  • the wire 23 is wound alternately on the capstans 16 of a second pair 25 of means 11b and 11a, undergoing of course additional drawing passes whose number is equal to the number of capstans 16 of said pair 25.
  • each capstan 16 of the traction means 11a is provided with independently actuated motion, since it is connected by means of the wheels 17 and the belts 18 to electric motors 22.
  • Each electric motor 22 is an integral part of corresponding control systems which allow to perform on-line some adjustments in combination with the use of the reading disks 19, which are arranged at the shafts 15, opposite the capstans 16.
  • the adjustments are required by the fact that the dies, as mentioned, are subject to continuous wear, which causes a gradual increase in the cross-section of the wire 23 being drawn, and a consequent reduction in its speed.
  • the main adjustment consists in step synchronization.
  • the capstan 16 of the guiding means 11b reports the exact speed of the wire 23 before the die.
  • the capstan 16 of the guiding means 11b again reports the speed of the wire 23 after the die.
  • Each one of the steps (motors) is cascade-connected to a PID (proportional-integral-derivative) card of a per se known type, in order to have an adequate recall response.
  • PID proportional-integral-derivative
  • the speeds of the capstan 16 of the traction means 11a and of the capstan 16 of the guiding means 11b downstream of the die, arranged in operating succession, are compared.
  • the elongation of the metal wire 23 produced by the ratio between the rim speeds of two successive freely rotating capstans 16, i.e., of the guiding means 11b, with mathematical processing is indicated as die wear.
  • the difference between the set diameter of the wire 23 and the diameter read by the system is measured.
  • the materials used may be any according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
EP00124359A 1999-11-18 2000-11-17 Machine a tréfiler Withdrawn EP1101545A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD990255 1999-11-18
ITPD990255 IT1309934B1 (it) 1999-11-18 1999-11-18 Struttura di trafila per fili metallici

Publications (2)

Publication Number Publication Date
EP1101545A2 true EP1101545A2 (fr) 2001-05-23
EP1101545A3 EP1101545A3 (fr) 2002-06-05

Family

ID=11392778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00124359A Withdrawn EP1101545A3 (fr) 1999-11-18 2000-11-17 Machine a tréfiler

Country Status (2)

Country Link
EP (1) EP1101545A3 (fr)
IT (1) IT1309934B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20100099A1 (it) * 2010-04-09 2011-10-10 Welding Wire Machineries S R L Struttura di trafila per fili metallici e relativo processo di trafilatura
CN111085556A (zh) * 2019-12-30 2020-05-01 镇江耐丝新型材料有限公司 一种双低功率车台拉拔粗规格钢丝的模链设计方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582537C (de) * 1932-04-01 1933-08-17 Heraeus Vacuumschmelze Akt Ges Mehrfachdrahtziehmaschine
JPS62244520A (ja) * 1986-04-14 1987-10-24 Fuji Electric Co Ltd 多頭式伸線機の制御装置
JPS6462212A (en) * 1987-08-31 1989-03-08 Furukawa Electric Co Ltd Wire-drawing bench
EP0448528A1 (fr) * 1990-03-21 1991-09-25 R. LISCIANI TRAFILERIE E DIVISIONE DYN AUTOMAZIONE INDUSTRIALE S.n.c. Machine pour le tréfilage multiple sans glissement à bobines alignées avec synchronisation entre les cabestans de déroulement successifs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582537C (de) * 1932-04-01 1933-08-17 Heraeus Vacuumschmelze Akt Ges Mehrfachdrahtziehmaschine
JPS62244520A (ja) * 1986-04-14 1987-10-24 Fuji Electric Co Ltd 多頭式伸線機の制御装置
JPS6462212A (en) * 1987-08-31 1989-03-08 Furukawa Electric Co Ltd Wire-drawing bench
EP0448528A1 (fr) * 1990-03-21 1991-09-25 R. LISCIANI TRAFILERIE E DIVISIONE DYN AUTOMAZIONE INDUSTRIALE S.n.c. Machine pour le tréfilage multiple sans glissement à bobines alignées avec synchronisation entre les cabestans de déroulement successifs

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 116 (M-684), 13 April 1988 (1988-04-13) -& JP 62 244520 A (FUJI ELECTRIC CO LTD), 24 October 1987 (1987-10-24) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 258 (M-838), 15 June 1989 (1989-06-15) -& JP 01 062212 A (FURUKAWA ELECTRIC CO LTD:THE), 8 March 1989 (1989-03-08) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20100099A1 (it) * 2010-04-09 2011-10-10 Welding Wire Machineries S R L Struttura di trafila per fili metallici e relativo processo di trafilatura
CN111085556A (zh) * 2019-12-30 2020-05-01 镇江耐丝新型材料有限公司 一种双低功率车台拉拔粗规格钢丝的模链设计方法
CN111085556B (zh) * 2019-12-30 2021-06-01 镇江耐丝新型材料有限公司 一种双低功率车台拉拔粗规格钢丝的模链设计方法

Also Published As

Publication number Publication date
ITPD990255A1 (it) 2001-05-18
IT1309934B1 (it) 2002-02-05
EP1101545A3 (fr) 2002-06-05

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