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EP0340747A2 - Procédé et dispositif pour améliorer la qualité de l'enduction du matériau métallique en forme de barres - Google Patents

Procédé et dispositif pour améliorer la qualité de l'enduction du matériau métallique en forme de barres Download PDF

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Publication number
EP0340747A2
EP0340747A2 EP89108003A EP89108003A EP0340747A2 EP 0340747 A2 EP0340747 A2 EP 0340747A2 EP 89108003 A EP89108003 A EP 89108003A EP 89108003 A EP89108003 A EP 89108003A EP 0340747 A2 EP0340747 A2 EP 0340747A2
Authority
EP
European Patent Office
Prior art keywords
strand
forming
der
temperature field
temperature
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Withdrawn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
EP89108003A
Other languages
German (de)
English (en)
Other versions
EP0340747A3 (fr
Inventor
Gerhard Fessel
Klaus-Michael Dr. Petzold
Joachim Dr. Schlegel
Wolfhart Müller
Bernd Fölber
Roland Hellwig
Reinhard Wartenberg
Diethard Dr. Kiessling
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.)
VEB Draht- und Seilwerk Rothenburg
Original Assignee
VEB Draht- und Seilwerk Rothenburg
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
Priority claimed from DD31533488A external-priority patent/DD271715A1/de
Priority claimed from DD31533388A external-priority patent/DD271714A1/de
Priority claimed from DD31533288A external-priority patent/DD271713A1/de
Application filed by VEB Draht- und Seilwerk Rothenburg filed Critical VEB Draht- und Seilwerk Rothenburg
Publication of EP0340747A2 publication Critical patent/EP0340747A2/fr
Publication of EP0340747A3 publication Critical patent/EP0340747A3/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Withdrawn legal-status Critical Current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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/12—Die holders; Rotating dies
    • B21C3/14—Die holders combined with devices for guiding the drawing material or combined with devices for cooling, heating, or lubricating
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment

Definitions

  • the invention relates to a method and a device for improving the coating quality of surface-coated strand-like metallic goods, such as wires, pipes, strips, rods and profiles, by means of thermal surface treatment.
  • DD-PS 140 113 describes a device for improving the drawability when wet-coating coated wires, which reduces the scraping of the coating metal which occurs during wet-drawing and improves the uniformity of the thickness of the anti-corrosion and / or anti-drag coating.
  • an additional element is used, which ensures free entry and exit of the lubricant. With changing drawing conditions, the uniformity of the thickness of the coating is difficult to control and the drawing block is clogged or the additional element is sintered with the drawing block or drawing block holder.
  • an improvement in the surface quality of hot-dip coated strand-shaped goods is achieved by a tensile-compression molding in a forming step with a cross-sectional decrease of at least 25% at room temperature or immediately after coating in the semi-hot forming area.
  • DD-PS 147 207 it is known to use so-called pressure drawing dies to make drawing easier, in particular to set lubrication conditions that are as hydrodynamic as possible.
  • the devices that cause the greatest possible pressure increase in the forming zone are technically complex.
  • a disadvantage of the processes with an increase in pressure in the forming zone, in particular when forming coated goods, is that, as a result of the narrow confinement of the pressure areas, they become clogged with coating material, thereby losing their effectiveness and making it easier to achieve a stable drawing.
  • the temperature conditions in such pressure rooms cannot be influenced in a targeted manner.
  • the coating material may therefore be necessary to expose the surface layer to an elevated temperature without changing the physical and mechanical-technological properties of the base material.
  • this thermal surface treatment is carried out on strand-shaped coated goods by means of induction annealing.
  • the strand-like material is continuously guided through an electrical induction coil, the heating depth being controlled by means of the frequency of the AC voltage used.
  • this method has the disadvantage that the strand-like material must be positioned precisely in the coil in order to achieve a uniform temperature effect over the cross section. In addition, a high energy expenditure is necessary.
  • devices are known from DE-OS 3 306 387 which, by means of external heat sources, cause the solid lubricants to heat up prior to the forming in order to obtain a better lubricant application. It is disadvantageous that a targeted temperature influence of the material to be formed is not achieved in front of the forming zone.
  • the invention has for its object to provide a generic method and a device that make it possible to carry out a targeted, controllable, thermal treatment of a surface layer applied to a strand-like material before forming with little technical effort, without the physical and mechanical-technological To change material properties of the base material significantly and to ensure a higher uniformity of the coating.
  • a defined temperature field is generated immediately in front of the forming zone and is spatially limited.
  • a temperature field is understood to be the generation of a temperature gradient perpendicular and horizontal to the direction of movement of the strand-like material by the process-related solution, which causes heat to flow into the surface layer of the strand-like coated material.
  • part of the amount of heat generated during the shaping and returned against the direction of movement of the strand-like material is used.
  • the temperature field will spatially delimited by elements known per se so that a certain space with a temperature that is higher than the ambient temperature is generated simultaneously with the formation of the temperature field directly in front of the forming zone.
  • the coating material is introduced by the material moving in the longitudinal direction and brought into a plastic to liquid state. A quantitative compensation of the coating material takes place in the reaction space in the radial and / or axial direction of the strand-like material.
  • the coating material adheres to the strand-like material in the reaction chamber and thus passes through the forming zone.
  • the heat flow against the direction of movement of the strand-like material is also made possible by the solid, liquid or gaseous medium located immediately in front of the forming zone and surrounding the strand-like material.
  • Part of the amount of heat generated during the forming of the strand-like material to be shaped is returned against the direction of movement of the strand-like material by suitable technical measures.
  • This heat flow is used to increase the temperature of the edge zone or the coating applied to the strand-like material and the reaction space directly in front of the forming zone.
  • This controls the type and level of the temperature field in front of the forming zone and determines it in more detail depending on the setting of the forming parameters, such as the degree of forming, the forming speed, the drawing die geometry, lubricant properties as well as the resistance to deformation and the diameter of the material to be formed.
  • the formation of the temperature field is controlled by the thermal conductivity properties of the individual elements that delimit the temperature field spatially, an additional control variable being that the elements consist of materials with different thermal conductivity properties (e.g. bimetal principle).
  • the strand-like material is subjected to additional heating before entering the defined and spatially limited temperature field located in front of the forming zone.
  • This heating takes place by means of suitable methods and devices known per se, predominantly in the surface layer of the strand-like material.
  • additional Liche heating can use external heat sources or the heat generated by previous forming can be used.
  • Such an additional heat flow can also be generated via the heat-conducting elements which spatially delimit the temperature field.
  • External heat sources can also be used to heat these elements, which spatially limit the temperature field.
  • the interaction of the temperature field and the reaction space formed by the limitation of the temperature field has surprisingly shown that the surface quality of coated stranded goods or the applied coating itself can be influenced in a targeted manner.
  • a device which consists of one or more elements, such as flat or curved plates, sieves, nets or tubes and the like, and which has no direct contact with the longitudinally moving strand-like material.
  • the elements are arranged in such a way that a limited space is created directly in front of the forming device, with free entry and exit of liquid, solid or gaseous media to the strand-like material in front of the forming zone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP89108003A 1988-05-04 1989-05-03 Procédé et dispositif pour améliorer la qualité de l'enduction du matériau métallique en forme de barres Withdrawn EP0340747A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DD315333 1988-05-04
DD315334 1988-05-04
DD31533488A DD271715A1 (de) 1988-05-04 1988-05-04 Verfahren zur verbesserung der beschichtungsqualitaet strangfoermiger werkstoffe
DD31533388A DD271714A1 (de) 1988-05-04 1988-05-04 Verfahren zur oberflaechenbehandlung von strangfoermigem und beschichtetem metallischem halbzeug
DD315332 1988-05-04
DD31533288A DD271713A1 (de) 1988-05-04 1988-05-04 Vorrichtung zur erzeugung eines definierten temperaturfeldes unmittelbar vor einer umformung

Publications (2)

Publication Number Publication Date
EP0340747A2 true EP0340747A2 (fr) 1989-11-08
EP0340747A3 EP0340747A3 (fr) 1990-06-06

Family

ID=27179917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108003A Withdrawn EP0340747A3 (fr) 1988-05-04 1989-05-03 Procédé et dispositif pour améliorer la qualité de l'enduction du matériau métallique en forme de barres

Country Status (1)

Country Link
EP (1) EP0340747A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989251A3 (fr) * 1998-09-23 2001-06-06 Goldbach Innenausbau GmbH Poteau profilé, en particulier pour cloisons et méthode de fabrication de poteaux profilés
CN112794157A (zh) * 2021-03-29 2021-05-14 国网山东省电力公司昌乐县供电公司 一种用于电缆盘的电缆加热装置及电缆布设方法
CN113692324A (zh) * 2019-02-20 2021-11-23 派拉蒙模具公司 线材拉伸监测系统
CN114011892A (zh) * 2021-10-29 2022-02-08 华中科技大学 可控温控速超声振动辅助薄壁毛细管拉拔成形装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1507823A (en) * 1973-12-17 1978-04-19 Lee & Sons Ltd A Wire drawing
EP0013012B1 (fr) * 1978-12-21 1984-06-20 Akademie der Wissenschaften der DDR Dispositif pour l'application d'un lubrifiant à une matière à déformer
DD160550A3 (de) * 1981-02-02 1983-09-14 Rothenburg Draht Seilwerk Verfahren zur direkten elektrischen widerstandserwaermung von metallischen werkstuecken
DE3306387A1 (de) * 1982-03-12 1983-09-22 Maschinenfabrik Herborn Kg, 6348 Herborn Vorrichtung zum drahtziehen
GB8311301D0 (en) * 1983-04-26 1983-06-02 Hashmi M S J Reducing section of elongated components
DD219124A1 (de) * 1983-10-13 1985-02-27 Adw Ddr Verfahren zum aufbringen definierter schmierstoffschichten auf metallisches umformgut

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989251A3 (fr) * 1998-09-23 2001-06-06 Goldbach Innenausbau GmbH Poteau profilé, en particulier pour cloisons et méthode de fabrication de poteaux profilés
CN113692324A (zh) * 2019-02-20 2021-11-23 派拉蒙模具公司 线材拉伸监测系统
CN112794157A (zh) * 2021-03-29 2021-05-14 国网山东省电力公司昌乐县供电公司 一种用于电缆盘的电缆加热装置及电缆布设方法
CN112794157B (zh) * 2021-03-29 2021-07-27 国网山东省电力公司昌乐县供电公司 一种用于电缆盘的电缆加热装置及电缆布设方法
CN114011892A (zh) * 2021-10-29 2022-02-08 华中科技大学 可控温控速超声振动辅助薄壁毛细管拉拔成形装置及方法
CN114011892B (zh) * 2021-10-29 2022-07-05 华中科技大学 可控温控速超声振动辅助薄壁毛细管拉拔成形装置及方法

Also Published As

Publication number Publication date
EP0340747A3 (fr) 1990-06-06

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