EP0673689A1 - Drawing machine - Google Patents

Drawing machine Download PDF

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Publication number
EP0673689A1
EP0673689A1 EP95103630A EP95103630A EP0673689A1 EP 0673689 A1 EP0673689 A1 EP 0673689A1 EP 95103630 A EP95103630 A EP 95103630A EP 95103630 A EP95103630 A EP 95103630A EP 0673689 A1 EP0673689 A1 EP 0673689A1
Authority
EP
European Patent Office
Prior art keywords
wire
pulley
skew
drum
drawing 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.)
Withdrawn
Application number
EP95103630A
Other languages
German (de)
English (en)
French (fr)
Inventor
Angelo Maccaferri
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.)
SAMP SpA Meccanica di Precisione
Original Assignee
SAMP SpA Meccanica di Precisione
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 SAMP SpA Meccanica di Precisione filed Critical SAMP SpA Meccanica di Precisione
Publication of EP0673689A1 publication Critical patent/EP0673689A1/en
Withdrawn legal-status Critical Current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
    • 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
    • B21C1/10—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 with accumulation of material between consecutively-arranged dies

Definitions

  • the invention relates to a drawing machine or draw-bench, particularly for metal wire, characterized by a considerably shorter length than that of known drawing machines, with all the advantages derived from this condition.
  • the wire drawing drums are mounted on the supporting frame with a small distance between them, at least sufficient to permit the free passage of the operator's arm for running the wire around them, the wire being run between each pair of adjacent drawing drums over a skew pulley of suitable diameter, designed to act also as an idler for the longitudinal tensioning of the said wire.
  • the skew pulley is disposed above the drawing drum to be fed, and between these two components is the drawplate which reduces the section of the wire.
  • the drums 1 are driven by a corresponding gearmotor unit with a motor 4 with electronic speed control, so that the said drums 1 rotate at a progressively increasing speed.
  • the motors 4 are conveniently cooled by a ventilation duct 105 to which is joined an electric fan 5. It should be understood, however, that these details are extraneous to the innovation concerned here, and therefore may be modified considerably.
  • the wire 2 which is to be wound on the first drawing drum 1 is first run around a pulley 6 supported so that it is free-running by the bench 3 (see below), parallel to the axis of the said drum, and the portion of wire leaving the said pulley passes through a drawplate 7 before reaching the drum.
  • each successive drum 1 there is provided a free-running pulley 8, with a skew disposition, whose diameter is sufficiently large for the entry part of the wire to be aligned with the exit point of the wire from the preceding drum 1 and for the exit part of the wire to be aligned with the entry point of the said wire to the underlying drum 1.
  • the pulley 8 is required to act both as a means of directing the wire from one drawing unit to the next, and as an idler or tensioning device to provide the wire with the necessary longitudinal tension.
  • the pulley 8 is supported rotatably about its own axis by a pivot 9 which passes through an aperture 10 in the vertical wall 103 of the bench 3 and whose end behind the said wall is integral with a vertical collar 11 which, with the interposition of recirculating ball bearings 12-112, slides on a vertical guide bar 13, fixed by its ends to supports 14-114 fixed to project from the said wall 103 of the bench.
  • the ends of a guide 15, parallel to the guide 13, are fixed to the said supports, and on its opposite sides there run a pair of rollers 16 supported by the carriage 17 integral with the said collar 11.
  • the pulley 8 may therefore undergo raising and lowering movements, while remaining in the predetermined skew orientation, with the orientation specified in respect of the preceding roller and of the underlying drawing roller.
  • a perpendicular pivot 18 is integral with the said collar 11 and is connected at 19 to the rod of a single-acting cylinder and piston unit 20, whose casing is hinged at 21 to the said wall 103.
  • the unit 20 may, for example, be of the plunger type, connected to a source of pressurized fluid, so that the pulley 8 is pushed upwards with a sufficient force which is inversely proportional to the portion of wire to be tensioned.
  • Figure 4 shows how the exposed portions of the guide 13 and of the rod of the unit 20 are protected by bellows 22-122-23.
  • the drawplate 107 which acts on the portion of wire between each pulley 8 and the underlying drawing drum 1 is vertical and at a tangent to the drawing surface of the said drum, and the point at which the wire leaves the said pulley 8 must be axially aligned as closely as possible with the said drawplate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)
  • Confectionery (AREA)
  • Metal Extraction Processes (AREA)
EP95103630A 1994-03-25 1995-03-14 Drawing machine Withdrawn EP0673689A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO940131 1994-03-25
ITBO940131A IT1273272B (it) 1994-03-25 1994-03-25 Trafilatrice ad ingombro contenuto

Publications (1)

Publication Number Publication Date
EP0673689A1 true EP0673689A1 (en) 1995-09-27

Family

ID=11339646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103630A Withdrawn EP0673689A1 (en) 1994-03-25 1995-03-14 Drawing machine

Country Status (2)

Country Link
EP (1) EP0673689A1 (it)
IT (1) IT1273272B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840878B2 (en) * 2002-12-23 2005-01-11 Depuy Products, Inc. Idler assembly for a sanding/polishing device
CN102699066A (zh) * 2012-01-29 2012-10-03 无锡市常欣机电科技有限公司 水箱拉丝机张力机构
ITUB20161051A1 (it) * 2016-02-25 2017-08-25 Zt S R L Macchina trafilatrice e metodo di trafilatura
CN116475254A (zh) * 2023-05-04 2023-07-25 浙江晋椿精密工业股份有限公司 一种具有线材预紧装置的连续拉丝机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB915257A (en) * 1961-03-10 1963-01-09 Syncro Mach Co Improvements in wire drawing machine
GB931178A (en) * 1961-08-28 1963-07-10 Morgan Construction Co Wire drawing machine
US4045992A (en) * 1976-06-04 1977-09-06 Amtel, Inc. Dancer pulley mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB915257A (en) * 1961-03-10 1963-01-09 Syncro Mach Co Improvements in wire drawing machine
GB931178A (en) * 1961-08-28 1963-07-10 Morgan Construction Co Wire drawing machine
US4045992A (en) * 1976-06-04 1977-09-06 Amtel, Inc. Dancer pulley mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840878B2 (en) * 2002-12-23 2005-01-11 Depuy Products, Inc. Idler assembly for a sanding/polishing device
US7090605B2 (en) 2002-12-23 2006-08-15 Depuy Products, Inc. Apparatus for processing a prosthetic component
CN102699066A (zh) * 2012-01-29 2012-10-03 无锡市常欣机电科技有限公司 水箱拉丝机张力机构
ITUB20161051A1 (it) * 2016-02-25 2017-08-25 Zt S R L Macchina trafilatrice e metodo di trafilatura
WO2017145084A1 (en) * 2016-02-25 2017-08-31 Zt S.R.L. Drawing machine and drawing method
CN116475254A (zh) * 2023-05-04 2023-07-25 浙江晋椿精密工业股份有限公司 一种具有线材预紧装置的连续拉丝机
CN116475254B (zh) * 2023-05-04 2023-11-17 浙江晋椿精密工业股份有限公司 一种具有线材预紧装置的连续拉丝机

Also Published As

Publication number Publication date
ITBO940131A1 (it) 1995-09-25
IT1273272B (it) 1997-07-07
ITBO940131A0 (it) 1994-03-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19960612

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18D Application deemed to be withdrawn

Effective date: 19970906