EP1678346A1 - Equipment and method for treating the surface of a metal object - Google Patents

Equipment and method for treating the surface of a metal object

Info

Publication number
EP1678346A1
EP1678346A1 EP04767105A EP04767105A EP1678346A1 EP 1678346 A1 EP1678346 A1 EP 1678346A1 EP 04767105 A EP04767105 A EP 04767105A EP 04767105 A EP04767105 A EP 04767105A EP 1678346 A1 EP1678346 A1 EP 1678346A1
Authority
EP
European Patent Office
Prior art keywords
metal object
rinsing
arrangement
gas
drying
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Withdrawn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
EP04767105A
Other languages
German (de)
English (en)
French (fr)
Inventor
Matti Leiponen
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.)
Luvata Oy
Original Assignee
Outokumpu Copper Products Oy
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 Outokumpu Copper Products Oy filed Critical Outokumpu Copper Products Oy
Publication of EP1678346A1 publication Critical patent/EP1678346A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • 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
    • 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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
    • B21C29/006—Gas treatment of work, e.g. to prevent oxidation or to create surface effects
    • 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
    • B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
    • 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

Definitions

  • the invention relates to an equipment and method for treating the surface of a metal object made of copper or copper alloy prior to the deformation process.
  • the material to be extruded is conducted to a groove made on the outer circumference of a wheel-like element.
  • the material to be extruded gets into contact with a counterpart element essentially filling the groove, so that the motion of the material to be extruded with respect to the wheel-like element is changed.
  • the material is fed into extrusion in the proceeding direction thereof, through an extrusion aperture provided in the extrusion element prior to the counterpart element.
  • the method utilizes the thermal energy created in the friction and in the deformation process. By means of the method, it is possible to extrude essentially long objects with advantageously different transversal surfaces.
  • the feed wire to be fed in continuous extrusion must often be cleared of the oxide layers accumulated on the surfaces.
  • the surface oxides are removed mechanically as so-called extrusion scrap, the treatment and recycling of which result in harmful additional expenses.
  • the creation of hot extrusion scrap results in intensive wearing of the extrusion tools and drops the extrusion speed down to a fraction.
  • pickling i.e. chemical clearing of oxide layers off the metal surfaces by a solution. It is common knowledge that all grease and oil should be removed from the surface of the product before pickling. Generally the pickling of copper metals is carried out in a sulfuric acid/water solution, and it removes the major part of the oxides accumulated on the surface.
  • a method and device for pretreating a non-ferrous object prior to deformation there is known a method and device for pretreating a non-ferrous object prior to deformation.
  • a moving metal object is subjected to a continuous deoxidation and cleaning treatment, as well as to a rinsing and drying treatment before deformation, and the purpose is to prevent the accumulation of an oxide layer on the surface of the object before the deformation process.
  • the oxygen content of the rinsing water of the feed wire may affect the accumulation of the oxide layers.
  • the use of normal air in the drying step may result in a harmful oxidation of the surface.
  • the object of the present invention is to introduce a novel solution for treating the surface of a metal object made of copper or copper alloy prior to the deformation process, so that the oxidation of the surface of the metal object is prevented.
  • a particular object of the invention is to prevent the surface oxidation by making the rinsing and drying treatment of the surface more effective and rapid.
  • the invention is characterized by what is set forth in the characterizing part of the independent claims. Other embodiments of the invention are characterized by what is set forth in the rest of the claims.
  • the arrangement according to the invention makes it possible to form an oxide-free wire surface prior to a deformation process, such as continuous extrusion, which enhances the creation of a flawless extrusion product. Consequently there are avoided the drawbacks caused by the treatment and recycling of extrusion scrap, because the creation of the extrusion scrap is prevented.
  • an equipment for treating the surface of a metal object made of copper or copper alloy prior to the working process said equipment including: means for conveying the metal object to the deformation process; equipment for deoxidizing the metal object surface in at least one step; a rinsing arrangement for cleaning the metal object surface, as well as a drying arrangement for drying the surface, so that the rinsing arrangement and the drying arrangement are mutually located as close to each other as possible.
  • the invention also relates to a method carried out by the above described equipment.
  • the rinsing equipment includes at least a rinsing chamber and rinsing nozzles for spraying rinsing liquid onto the metal object surface.
  • the employed rinsing liquid is water from which oxygen is removed, the surface oxidation during the rinsing step is advantageously prevented.
  • the drying arrangement includes at least a predrying chamber as well as gas nozzles for feeding gas, such as nitrogen, onto the metal object surface.
  • the distance between the rinsing nozzles and the gas nozzles is preferably no more than 200 millimeters, in which case an optimal degree of purity and dryness are achieved on the metal object surface.
  • the metal object is dried in a heated final drying chamber prior to the deformation. According to the invention, possible oxidation of the metal object surface is effectively prevented during the rinsing and drying treatment after the deoxidation step, before the deformation process.
  • Figure 1 illustrates a method according to the invention for treating the surface of a metal object 2 being conducted to a deformation process 14, such as a continuous extrusion process.
  • metal object generally means metal wire with a thickness of 10 - 25 millimeters.
  • the metal wire can be manufactured for example by vertical casting, which metal wire is further treated in continuous extrusion to form a product of a desired shape.
  • the metal object 2 is subjected to at least one deoxidation treatment 1 , where oxides are removed from its surface in a known way, such as pickling with sulfuric acid.
  • the metal object, such as metal wire is conducted to a rinsing treatment, where the surface of the metal object 2 is rinsed for removing impurities from the surface.
  • the metal object 2 is treated in a rinsing arrangement 3, comprising a rinsing chamber 4, provided with a necessary amount of rinsing nozzles 5 for spraying the rinsing liquid 21 onto the surface of the metal object 2, essentially so that the impurity films are removed throughout.
  • the rinsing nozzles 5 are arranged in the rinsing chamber 4 for example so that they are placed at regular intervals around the metal object. From the rinsing nozzles 5, there is sprayed rinsing liquid 21 , which is water. Oxygen is removed from the water for instance by poling water with nitrogen before the water is sprayed onto the surface of the metal object.
  • the quantity of oxygen left in the rinsing water is about 5 - 20 ppb.
  • the rinsing nozzles are placed in the rinsing chamber in a position where the rinsing liquid sprayed through the rinsing nozzles 5 at a pressure as high as possible removes all impurity films from the surface of the metal object 2.
  • the rinsing liquid sprayed through the rinsing nozzles is directed against the proceeding direction of the metal object, so that the angle C left between the rinsing nozzles and the metal object 2 is advantageously 45 - 60 degrees.
  • the used rinsing liquid can be removed from the rinsing chamber 4 through the discharge channel 10.
  • the metal object is conducted to a drying treatment in the predrying chamber 6 of a drying arrangement 15, where the metal object is subjected to predrying for removing the rinsing liquid films.
  • a wall 7 for mutually separating the spaces defined by the chambers 4 and 6, said wall being provided with a slot 8, through which the moving metal object 2 is fit to proceed.
  • the surface of the metal object 2 is sprayed with pure nitrogen for drying the surface. Nitrogen is fed through gas nozzles 9 onto the metal object surface, and a required number of gas nozzles is placed at regular intervals around the metal object 2.
  • the gas nozzles 9 are located so that gas is fed against the proceeding direction of the metal object, and the angle D left between the gas nozzles and the metal object D is advantageously 45 - 60 degrees.
  • the separate chambers are mutually arranged so that the distance A between the rinsing nozzles 5 and the gas nozzles 9 is as short as possible, 200 millimeters at the most, advantageously about 20 millimeters.
  • the distance B from the wall 7 to the end 11 of the predrying chamber 6 is essentially short, about 10 - 20 millimeters.
  • the major part of the nitrogen is discharged through a narrow slot 8 provided in the wall 7 to the side of the rinsing chamber 4, which prevents splashes of the rinsing liquid from accessing the predrying chamber from the rinsing chamber.
  • the metal object 2 is conducted to the final drying treatment, where the moving metal object is transferred to be dried in a heated gas atmosphere in the final drying chamber 12.
  • the employed gas 13 can be nitrogen, with a temperature higher than 150 9 C.
  • the metal object is held essentially longer than in the drying step taking place in the predrying chamber.
  • Another method according to the invention for obtaining heat in the final drying chamber 12 is to use induction heating for heating up the final drying chamber.
  • the metal object is conducted to deformation 14, i.e. to continuous extrusion.
  • Both the arrangement 1 for deoxidizing the metal surface, the rinsing arrangement 3 and the drying arrangement 15, as well as the continuous extrusion equipment 14, are insulated from indoor air in a separate oxygen-free protective gas atmosphere in order to avoid oxidation of the metal object surface.
  • the metal object 2 is guided, by means of control members 16, such as control rings, to proceed along the correct line, but mainly the metal object is moved by a moving feed element 17 of the continuous extrusion device.
  • Figure 2 is a more detailed illustration of a conventional continuous extrusion equipment 14. From the final drying chamber 12, the metal object 2 is conducted onto the feed element 17 of the extrusion device and further to a groove 18 provided on the circumference of the feed element. In the groove the material to be extruded further proceeds towards a stop 19 that forces the material to change direction towards the extrusion element 20, through which the material is extruded in a desired shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention relates to an equipment for treating the surface of a metal object (2) made of copper or copper alloy prior to a deformation process (14), said equipment including means for conveying the metal object to the deformation process, an arrangement (1) for deoxidizing the metal object surface in at least one step, a rinsing arrangement (3) for cleaning the metal object surface, as well as a drying arrangement (15) for drying the surface, said rinsing arrangement and drying arrangement being placed as close to each other as possible. The invention also relates to a method for treating the surface of a metal object made of copper or copper alloy.
EP04767105A 2003-10-27 2004-10-07 Equipment and method for treating the surface of a metal object Withdrawn EP1678346A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20031565A FI20031565A (fi) 2003-10-27 2003-10-27 Laitteisto ja menetelmä metallikappaleen pinnan käsittelemiseksi
PCT/FI2004/000591 WO2005040456A1 (en) 2003-10-27 2004-10-07 Equipment and method for treating the surface of a metal object

Publications (1)

Publication Number Publication Date
EP1678346A1 true EP1678346A1 (en) 2006-07-12

Family

ID=29226002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767105A Withdrawn EP1678346A1 (en) 2003-10-27 2004-10-07 Equipment and method for treating the surface of a metal object

Country Status (4)

Country Link
EP (1) EP1678346A1 (fi)
FI (1) FI20031565A (fi)
TW (1) TW200529941A (fi)
WO (1) WO2005040456A1 (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128326B (zh) * 2014-06-20 2016-06-08 珠海松田电工有限公司 一种漆包铜线清洗装置及利用其清洗铜线的方法
CN106625170A (zh) * 2016-11-24 2017-05-10 重庆市泰日建材有限公司 一种钢筋除锈装置
CN112605144B (zh) * 2020-11-20 2022-02-15 顺德职业技术学院 一种铝合金家具铝材生产加工用快速压合装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763502A (en) * 1982-09-09 1988-08-16 Amf - Aluteam Metal Forming Gmbh Method and a device for pretreating nonferrous metal for plastic deformation
DE4316144A1 (de) * 1993-05-14 1994-11-17 Siemens Ag Verfahren und Einrichtung zur Reinigung eines gezogenen Drahtes
JP3184672B2 (ja) * 1993-07-26 2001-07-09 ミネベア株式会社 金属品洗浄方法及び金属品洗浄装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005040456A1 *

Also Published As

Publication number Publication date
FI20031565A0 (fi) 2003-10-27
TW200529941A (en) 2005-09-16
FI20031565A (fi) 2005-04-28
WO2005040456A1 (en) 2005-05-06

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