EP1579928B1 - Procédé d'enlèvement de calamine ou de rouille d'un produit métallique déformable - Google Patents

Procédé d'enlèvement de calamine ou de rouille d'un produit métallique déformable Download PDF

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Publication number
EP1579928B1
EP1579928B1 EP05102316A EP05102316A EP1579928B1 EP 1579928 B1 EP1579928 B1 EP 1579928B1 EP 05102316 A EP05102316 A EP 05102316A EP 05102316 A EP05102316 A EP 05102316A EP 1579928 B1 EP1579928 B1 EP 1579928B1
Authority
EP
European Patent Office
Prior art keywords
lubricant
layer
scale
rust
process according
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.)
Expired - Lifetime
Application number
EP05102316A
Other languages
German (de)
English (en)
Other versions
EP1579928A1 (fr
Inventor
Harri Weihnhold
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.)
Ecoform Umformtechnik GmbH
Original Assignee
Ecoform Umformtechnik GmbH
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 Ecoform Umformtechnik GmbH filed Critical Ecoform Umformtechnik GmbH
Publication of EP1579928A1 publication Critical patent/EP1579928A1/fr
Application granted granted Critical
Publication of EP1579928B1 publication Critical patent/EP1579928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS 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
    • B21C43/02—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • B21C43/04—Devices for de-scaling wire or like flexible work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS 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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material

Definitions

  • the invention relates to the field of metallurgy and relates to a method for removing scale and rust layers of metallic Umformgut.
  • wire rod In the wire drawing process, the previous cleaning process of the semifinished product, usually referred to as wire rod, plays an important role. It is well known that wire rod is covered with oxide, hydroxide, scale or the like. This, especially from the hot forming process originating surface layers must be carefully removed before pulling, because their presence not only cause a much higher wear of the drawing tools and a significant reduction in the possible pulling speed, but also a strong reduction in quality of the wire to be pulled.
  • the group of dry cleaning processes basically involves wet pickling of the wire, but requires a number of additional operations, such as neutralizing, rinsing, drying, etc.
  • Such process steps and associated processes Facilities are very expensive.
  • the media required for this, such as acids and alkalis burden the environment to a not inconsiderable degree.
  • Another method of scale removal by rolling and thus combined chemical treatment utilizes specific geometric relationships between the roll diameter and the thickness of the metal strip, the diameter of at least one of the rolls being greater than 5 times and less than 50 times the thickness of the strip should ( US 2,650,888 ).
  • a rolling process leading buckling and a subsequent breaking of the scale layer are used in order to be able to remove them in the sequence easier with a chemical treatment can.
  • the mechanical cleaning methods can usually be subdivided into three cleaning zones which follow one another in the drawing direction during wire drawing.
  • the wire rod is forcibly guided through a tortuous path of two angularly staggered roller assemblies, whereby the wire is bent both mutually and in two planes rotated by 90 ° and thus more or less flaking off the brittle scale layers from the metal surface ,
  • wire brush systems are arranged around the wire rod and usually brush tangentially the wire surface.
  • the disadvantage here is the very complex mechanics of the brush driving drive system, the high cost of acquisition and maintenance and the lack of reliability of these systems due to the dusty environment and the high performance requirements.
  • Another disadvantage of these arrangements is that in addition technical means for the automatic compensation of the game are to be provided, as a result of the high load of the brush and their constant high wear results.
  • Another disadvantage of these brush systems is that the wire rod surface is mechanically processed by the strong action of the brushes that result in close proximity to the surface due to taking place occasional high warming and subsequent rapid cooling structural changes to martensite. These solidified brittle structural parts are very detrimental to the subsequent drawing process as well as downstream electrolytic surface treatment processes, such as e.g.
  • the wire rod is treated in a third cleaning area to remove the remaining oxide dust residues with compressed air jets.
  • the invention has for its object to provide a reliable, cost-effective, technologically simple and environmentally friendly method for removing scale and To provide rust layers of metallic Umformgut, in which damage to the surface and the structure of the Umformgutes and the forming tools is avoided.
  • the inventive method is based on the technology that the Umformgut afflicted with a scale layer and / or rust layer is coated with a closed layer of a lubricant and the Umformgut so wrapped for the purpose of detachment of the scale layer and / or rust layer of metallic Umformgut a cross-section reducing forming with a Is subjected to a degree of deformation of> 3% and in which the lubricant coating present on the forming material is removed together with the parts of the scale layer and / or rust layer contained therein.
  • the inventive method is characterized in that the Umformgut is drawn for wrapping with the lubricant through a lubricant chamber having an inlet nozzle and a discharge nozzle for the inlet and outlet of the Umformgutes, wherein the outlet nozzle is the forming tool.
  • the lubricant is applied in the lubricant chamber under the condition of a fixed or controllable pressure on the Umformgut.
  • the lubricant of the lubricant chamber is supplied externally under the action of pressure, wherein the lubricant pressure in the lubricant chamber and / or the inlet nozzle are chosen so large that a portion of the lubricant against the transport direction of the Umformgutes is pressed through the annular gap between inlet nozzle and Umformgut.
  • the lubricant pressure is measured in the lubricant chamber and the measured values are used to control and control the pulling rate and / or the process temperature.
  • the lubricant chamber can advantageously be used a liquefied or converted into a paste state solid lubricant.
  • the solid lubricant can be converted under the action of pressure and / or temperature in the liquid or pasty state.
  • the detachment of the scale layer and / or rust layer from the metallic material to be formed is controlled by the choice of the degree of deformation, the geometry of the forming tools, the type and thickness of the lubricant coating and / or the forming speed.
  • one or more forming tools can be used according to the invention.
  • the lubricant coating is removed together with the parts of the scale layer and / or rust layer contained therein by a cleaning process.
  • a liquid can be used for the cleaning process.
  • a heated Umformgut is supplied to the cleaning process.
  • the removal of the lubricant envelope together with the parts of the scale layer and / or rust layer contained therein can also be realized by selecting the cylindrical guide length L of the single or the last forming tool with L ⁇ 0.3 d, where d is the diameter of the outgoing Forming good is.
  • the lubricant casing is automatically blasted from the forming material as a result of the rapid pressure drop due to the short guide length directly at the outlet of the forming tool.
  • a heated or cooled lubricant can be used for the coating of the forming material afflicted with a scale layer and / or rust layer.
  • the method according to the invention is distinguished by several significant advantages over the prior art.
  • the new method is also characterized by a high level of reliability coupled with low wear of the device system.
  • the example concerns the cleaning of a steel wire brand C40 with a nominal diameter of 5.5 mm.
  • the wire has a closed scale layer resulting from hot rolling.
  • the wire rod is drawn at a speed of 1 m / s through a lubricant chamber having an inlet nozzle and an outlet nozzle for the entry and exit of the Umformgutes.
  • the lubricant chamber is filled with a pressurized solid lubricant.
  • the lubricant is supplied to the lubricant chamber by means of an external lubricant supply device under the action of pressure.
  • the pressure in the lubricant chamber is set to a value of 600 bar and kept constant during the passage of the wire rod through the lubricant chamber via a control device.
  • the outlet nozzle of the lubricant chamber is designed as a drawing die, with which the scaled, in the lubricant chamber covered with lubricant wire rod is drawn to a diameter of 4.75 mm.
  • the wire thus treated is subjected to a fine cleaning immediately after exiting the lubricant chamber with rotating plastic brushes and with a compressed air blower. After that there is a wire completely cleaned of scale for further processing in, for example, a drawing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (11)

  1. Procédé d'enlèvement de couches de calamine et de rouille d'un produit métallique déformable, dans lequel on enveloppe le produit déformable affecté d'une couche de calamine et/ou d'une couche de rouille avec une couche fermée d'un lubrifiant, on soumet le produit métallique ainsi enveloppé à une déformation de réduction de la section transversale avec un taux de déformation ε > 3 % dans le but de détacher la couche de calamine et/ou la couche de rouille du produit métallique déformable, et après cette déformation on enlève l'enveloppe de lubrifiant présente sur le produit déformable en même temps que les parties de la couche de calamine et/ou de la couche de rouille qu'elle contient, caractérisé en ce que l'on tire le produit déformable à travers une chambre de lubrifiant en vue de l'envelopper avec le lubrifiant, chambre qui présente une buse d'entrée et une buse de sortie pour l'entrée et la sortie du produit déformable, dans laquelle la buse de sortie est l'outil de déformation, et en ce que l'on applique le lubrifiant dans la chambre de lubrifiant sur le produit déformable sous la condition d'une pression fixement réglée ou régulable et on fournit le lubrifiant de l'extérieur à la chambre de lubrifiant sous l'action de la pression, dans lequel on choisit une pression de lubrifiant dans la chambre de lubrifiant et/ou dans la buse d'entrée, suffisamment élevée pour qu'une partie du lubrifiant soit pressée à travers la fente annulaire entre la buse d'entrée et le produit déformable dans la direction opposée à la direction de transport du produit déformable.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on mesure la pression de lubrifiant dans la chambre de lubrifiant et on utilise les valeurs mesurées pour commander et réguler la vitesse de tirage et/ou la température de traitement.
  3. Procédé selon la revendication 1, caractérisé en ce que l'on utilise dans la chambre de lubrifiant un lubrifiant solide liquéfié ou amené dans un état pâteux.
  4. Procédé selon la revendication 3, caractérisé en ce que l'on amène le lubrifiant solide dans l'état liquide ou pâteux sous l'action de la pression et/ou de la température.
  5. Procédé selon la revendication 1, caractérisé en ce que l'on commande la séparation de la couche de calamine et/ou de la couche de rouille du produit métallique déformable par le choix du taux de déformation, la géométrie des outils de déformation, la nature et l'épaisseur de l'enveloppe de lubrifiant et/ou la vitesse de déformation.
  6. Procédé selon la revendication 1, caractérisé en ce que l'on emploie un ou plusieurs outils de déformation pour l'étape de séparation de la couche de calamine et/ou de la couche de rouille.
  7. Procédé selon la revendication 1, caractérisé en ce que l'on enlève l'enveloppe de lubrifiant en même temps que les parties de la couche de calamine et/ou de la couche de rouille qu'elle contient par un processus de nettoyage.
  8. Procédé selon la revendication 7, caractérisé en ce que l'on utilise un liquide dans le processus de nettoyage.
  9. Procédé selon la revendication 7, caractérisé en ce que l'on amène un produit déformable chauffé au processus de nettoyage.
  10. Procédé selon la revendication 1 et 6, caractérisé en ce que l'on choisit, pour l'enlèvement de l'enveloppe de lubrifiant en même temps que les parties de la couche de calamine et/ou de la couche de rouille qu'elle contient, une longueur de guidage cylindrique L du seul ou du dernier outil de déformation telle que L < 0,3 d, dans laquelle d est le diamètre du produit déformable sortant.
  11. Procédé selon la revendication 1, caractérisé en ce que l'on utilise un lubrifiant chauffé ou refroidi.
EP05102316A 2004-03-26 2005-03-23 Procédé d'enlèvement de calamine ou de rouille d'un produit métallique déformable Expired - Lifetime EP1579928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004015975A DE102004015975B3 (de) 2004-03-26 2004-03-26 Verfahren zum Entfernen von Zunder- und Rostschichten von metallischem Umformgut
DE102004015975 2004-03-26

Publications (2)

Publication Number Publication Date
EP1579928A1 EP1579928A1 (fr) 2005-09-28
EP1579928B1 true EP1579928B1 (fr) 2010-02-24

Family

ID=34745458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05102316A Expired - Lifetime EP1579928B1 (fr) 2004-03-26 2005-03-23 Procédé d'enlèvement de calamine ou de rouille d'un produit métallique déformable

Country Status (3)

Country Link
EP (1) EP1579928B1 (fr)
AT (1) ATE458562T1 (fr)
DE (2) DE102004015975B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213251B4 (de) * 2013-07-05 2016-09-29 Ecoform Umformtechnik Gmbh Verfahren und Vorrichtung zum Beschichten von zunderbehaftetemUmformgut mit einem Schmierstoff
CN109513767A (zh) * 2018-11-27 2019-03-26 宁波市铭宏国光化工有限公司 一种金属线材拉丝工艺以及拉丝设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835462A (en) * 1928-09-13 1931-12-08 American Electrical Works Wire drawing apparatus
US2650888A (en) * 1949-08-09 1953-09-01 Freeport Sulphur Co Metal surface treatment
JPS5772720A (en) * 1980-10-24 1982-05-07 Kawasaki Steel Corp Manufacture of cold rolled steel strip
JPS57137023A (en) * 1981-02-18 1982-08-24 Nippon Kokan Kk <Nkk> Descaling method for hot rolled steel plate
FR2702973B1 (fr) * 1993-03-23 1995-05-05 Trefileurope France Sa Procédé et dispositif de décalaminage d'un fil métallique.
DE19540602A1 (de) * 1995-10-31 1997-05-07 Kloeckner Stahl Gmbh Verfahren zum Entzundern von warmgewalztem Edelstahl-Bandmaterial
US6210501B1 (en) * 1995-10-11 2001-04-03 Nisshin Steel Co., Ltd. Heavy-duty cold-rolling for mechanically descaling a hot-rolled steel strip before pickling

Also Published As

Publication number Publication date
DE102004015975B3 (de) 2005-08-11
EP1579928A1 (fr) 2005-09-28
DE502005009059D1 (de) 2010-04-08
ATE458562T1 (de) 2010-03-15

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