EP1326721A1 - Method and apparatus for production of a continuously extruded product - Google Patents

Method and apparatus for production of a continuously extruded product

Info

Publication number
EP1326721A1
EP1326721A1 EP00969691A EP00969691A EP1326721A1 EP 1326721 A1 EP1326721 A1 EP 1326721A1 EP 00969691 A EP00969691 A EP 00969691A EP 00969691 A EP00969691 A EP 00969691A EP 1326721 A1 EP1326721 A1 EP 1326721A1
Authority
EP
European Patent Office
Prior art keywords
feedstock
continuous extrusion
circumferentially extending
extending groove
machining
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Withdrawn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
EP00969691A
Other languages
German (de)
French (fr)
Inventor
Daniel John Hawkes
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.)
BWE Ltd
Original Assignee
BWE Ltd
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 BWE Ltd filed Critical BWE Ltd
Publication of EP1326721A1 publication Critical patent/EP1326721A1/en
Withdrawn legal-status Critical Current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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/005—Continuous extrusion starting from solid state material

Definitions

  • TITLE METHOD AND APPARATUS FOR PRODUCTION OF A CONTINUOUSLY EXTRUDED PRODUCT
  • EP 071490 describes the production of a continuously extruded product including a feed reel means arranged to supply feedstock generally of substantially circular cross-section to a circumferentially extending groove in a wheel.
  • machining means are positioned to receive feedstock from the feed reel means and to discharge machined feedstock to the circumferentially extending groove, with the machining means being arranged to remove at least a surface layer from the feedstock and form a circular cross-section dimensioned as a close fit within the circumferentially extending groove.
  • the machining means include a centreless lathe.
  • the machining means includes a shaving head.
  • drive motors for the feed reel, the machining means and the wheel are electronically linked such that the speed of the feed reel and the speed of the machining means are adjusted in accordance with the speed of the wheel.
  • a method of production of a continuous extrusion product including supplying feedstock of substantially generally circular cross-section from a feed reel to machining means, machining the feedstock to remove at least a surface layer and form a circular cross section feed dimensioned as a close fit within the circumferentially extending groove, feeding the machined feedstock directly from the machining means to the circumferentially extending groove and driving the wheel carrying the machined feedstock around in the circumferentially extending groove to contact an abutment and discharge through a die to form an extruded product.
  • the feedstock is of aluminium.
  • the feedstock is copper.
  • the machining means operates to a tolerance of +/- 0.1 mm on a typical diameter of 12.7mm of feedstock.
  • the extrusion plant includes, in in-line series, a feed reel means, machining means, a continuous extrusion machine and a product take-up reel.
  • the feed reel means includes an electric drive motor and is arranged to deliver aluminium feedstock in the form of an approximately circular cross-section aluminium wire rod through guide rollers to a centreless lathe having an electric drive motor.
  • the centreless lathe is positioned closely adjacent the continuous extrusion machine and delivers machined feedstock directly to a parallel sided circumferentially extruding groove formed on the rotating wheel of the continuous extrusion machine driven by an electric motor.
  • the continuous extrusion machine discharges extruded product from a die connected through a passage in a die body mounted adjacent an abutment extending into the circumferentially extending groove and delivers the extruded product to the product take-up reel driven by an electric motor.
  • Respective electronic speed control means are associated with each of the electric motors with the speeds at the feed reel, of the centreless lathe and at the take- up reel being electronically linked to the speed of rotation of the rotating wheel of the continuous extrusion machine.
  • aluminium feed stock with a nominal diameter to +/- 0.2mm, or
  • metals other than aluminium, such as copper, may be 85 utilised as feedstock and that the extrusion product may be delivered at a controlled rate as cut-to-length bar stock rather than being wound on to a take-up reel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Metal Extraction Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Continuous extrusion means in which aluminium or copper feedstock with a nominal diameter approximately 4% greater than the width of the circumferentially extending groove in a continuous extrusion wheel is fed from a feed reel to a centreless lathe or shaving machine set to machine the feedstock to a diameter corresponding to the width of the groove. In thereby removing the surface layer, surface impurities are removed and feedstock with a clean, non-oxidised surface is delivered directly to the groove without the intervention of feed rollers liable to cause distortions in the feedstock whilst ensuring that substantially constant forces arise between the machined-to-size feedstock and the walls of the groove. This reduces any tendency of irregular feed toward the associated abutment and thus enhances the constancy of the product quality as well as avoiding problems arising from oxidation and/or surface imperfections.

Description

TITLE: METHOD AND APPARATUS FOR PRODUCTION OF A CONTINUOUSLY EXTRUDED PRODUCT
DESCRIPTION
This invention relates to a method of and apparatus for the production of a continuously extruded product. EP 071490 describes the production of a continuously extruded product including a feed reel means arranged to supply feedstock generally of substantially circular cross-section to a circumferentially extending groove in a wheel.
According to one aspect of the present invention machining means are positioned to receive feedstock from the feed reel means and to discharge machined feedstock to the circumferentially extending groove, with the machining means being arranged to remove at least a surface layer from the feedstock and form a circular cross-section dimensioned as a close fit within the circumferentially extending groove.
Preferably the machining means include a centreless lathe.
Alternatively, the machining means includes a shaving head.
Desirably, drive motors for the feed reel, the machining means and the wheel are electronically linked such that the speed of the feed reel and the speed of the machining means are adjusted in accordance with the speed of the wheel.
According to another aspect of the present invention, there is provided a method of production of a continuous extrusion product including supplying feedstock of substantially generally circular cross-section from a feed reel to machining means, machining the feedstock to remove at least a surface layer and form a circular cross section feed dimensioned as a close fit within the circumferentially extending groove, feeding the machined feedstock directly from the machining means to the circumferentially extending groove and driving the wheel carrying the machined feedstock around in the circumferentially extending groove to contact an abutment and discharge through a die to form an extruded product. Preferably, the feedstock is of aluminium.
Alternatively the feedstock is copper.
Desirably, the machining means operates to a tolerance of +/- 0.1 mm on a typical diameter of 12.7mm of feedstock.
In one embodiment, the extrusion plant includes, in in-line series, a feed reel means, machining means, a continuous extrusion machine and a product take-up reel.
The feed reel means includes an electric drive motor and is arranged to deliver aluminium feedstock in the form of an approximately circular cross-section aluminium wire rod through guide rollers to a centreless lathe having an electric drive motor.
The centreless lathe is positioned closely adjacent the continuous extrusion machine and delivers machined feedstock directly to a parallel sided circumferentially extruding groove formed on the rotating wheel of the continuous extrusion machine driven by an electric motor.
The continuous extrusion machine discharges extruded product from a die connected through a passage in a die body mounted adjacent an abutment extending into the circumferentially extending groove and delivers the extruded product to the product take-up reel driven by an electric motor.
Respective electronic speed control means are associated with each of the electric motors with the speeds at the feed reel, of the centreless lathe and at the take- up reel being electronically linked to the speed of rotation of the rotating wheel of the continuous extrusion machine.
In operation, aluminium feed stock with a nominal diameter to +/- 0.2mm, or
4% (i.e. approximately 2mm) greater than the width, axially of the wheel, of the groove, is fed from the feed reel to the centreless lathe which is set to machine the feedstock to a diameter corresponding to the width of the groove thereby removing a surface layer from the feedstock. In removing the surface layer, surface impurities are removed and 75 feedstock with a clean, non-oxidised, surface is delivered directly to the groove without intervention of feed rollers liable to cause distortions in the feedstock whilst at the same time ensuring substantially constant forces arising at the walls of the groove between the feedstock, which has been machined to close tolerances, and the walls of the groove. This reduces any tendency toward irregular feed of the feedstock around the
80 groove toward the abutment and thus enhances the constancy of the product quality arising from extrusion as well as avoiding problems with oxidation and/or surface imperfections inherent in separating the two processes.
It will be apparent that metals other than aluminium, such as copper, may be 85 utilised as feedstock and that the extrusion product may be delivered at a controlled rate as cut-to-length bar stock rather than being wound on to a take-up reel.
90

Claims

Claims
1. Continuous extrusion means including a feed reel means arranged to supply feedstock generally of substantially circular cross-section to a circumferentially extending groove in a wheel, characterised in that machining means are positioned to receive feedstock from the feed reel means and to discharge machined feedstock to the circumferentially extending groove, with the machining means being arranged to remove at least a surface layer from the feedstock and form a circular cross-section dimensioned to be a close fit within the circumferentially extending groove.
2. Continuous extrusion means as claimed in Claim 1, characterised in that the machining means includes a centreless lathe.
3. Continuous extrusion means as claimed in Claim 1, characterised in that the machining means includes a shaving head.
4. Continuous extrusion means as claimed in Claim 1, Claim 2 or Claim 3, characterised in that drive motors for the feed reel, the machining means and the wheel are electronically linked such that the speed of the feed reel and the speed of the machining means are adjusted in accordance with the speed of the wheel.
5. A method of production of a continuous extrusion product including supplying feedstock generally of substantially circular cross-section from a feed reel to machining means, machining the feedstock to remove at least a surface layer and form a circular cross-section feed dimensioned to be a close fit within a circumferentially extending groove in a wheel, feeding the machined feedstock directly from the machining means to the circumferentially extending groove and driving the wheel carrying the machined feedstock around in the circumferentially extending groove to contact an abutment and discharge through a die to form an extruded product.
6. A method of production of a continuous extrusion product as claimed in Claim 5, characterised in that the feedstock is of aluminium.
7. A method of production of a continuous extrusion product as claimed in Claim 5, characterised in that the feedstock is of copper.
8. A method of production of a continuous extrusion product as claimed in Claim 5, Claim 6 or Claim 7, characterised in that the machining means operates to a tolerance of +/- 0.1mm on a typical diameter of 12.7mm of feedstock.
EP00969691A 2000-10-19 2000-10-19 Method and apparatus for production of a continuously extruded product Withdrawn EP1326721A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2000/004036 WO2002032595A1 (en) 2000-10-19 2000-10-19 Method and apparatus for production of a continuously extruded product

Publications (1)

Publication Number Publication Date
EP1326721A1 true EP1326721A1 (en) 2003-07-16

Family

ID=9886090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00969691A Withdrawn EP1326721A1 (en) 2000-10-19 2000-10-19 Method and apparatus for production of a continuously extruded product

Country Status (5)

Country Link
EP (1) EP1326721A1 (en)
JP (1) JP2004512954A (en)
AU (1) AU2000279347A1 (en)
CA (1) CA2413843A1 (en)
WO (1) WO2002032595A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101947568A (en) * 2010-09-16 2011-01-19 陕西黄河集团有限公司 Multiple cold extrusion molding method of multi-cavity thin-shell part with non-uniform sections

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI114871B (en) * 2002-07-31 2005-01-14 Outokumpu Oy Removal of copper surface oxides

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1425665A1 (en) * 1963-06-25 1968-12-12 Licentia Gmbh High pressure valve
US4763502A (en) * 1982-09-09 1988-08-16 Amf - Aluteam Metal Forming Gmbh Method and a device for pretreating nonferrous metal for plastic deformation
JPS59183927A (en) * 1983-04-04 1984-10-19 Sumitomo Heavy Ind Ltd Rotary wheel type extrusion foaming device for metal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0232595A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101947568A (en) * 2010-09-16 2011-01-19 陕西黄河集团有限公司 Multiple cold extrusion molding method of multi-cavity thin-shell part with non-uniform sections

Also Published As

Publication number Publication date
AU2000279347A1 (en) 2002-04-29
CA2413843A1 (en) 2002-04-25
JP2004512954A (en) 2004-04-30
WO2002032595A1 (en) 2002-04-25

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Legal Events

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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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AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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Effective date: 20031212

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 20040423