EP1579928A1 - Verfahren zum Entfernen von Zunder- und Rostschichten von metallischem Umformgut - Google Patents
Verfahren zum Entfernen von Zunder- und Rostschichten von metallischem Umformgut Download PDFInfo
- Publication number
- EP1579928A1 EP1579928A1 EP05102316A EP05102316A EP1579928A1 EP 1579928 A1 EP1579928 A1 EP 1579928A1 EP 05102316 A EP05102316 A EP 05102316A EP 05102316 A EP05102316 A EP 05102316A EP 1579928 A1 EP1579928 A1 EP 1579928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- layer
- rust
- scale
- umformgut
- 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.)
- Granted
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
- 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 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
- B21C9/00—Cooling, heating or lubricating drawing material
- B21C9/005—Cold application of the lubricant
Definitions
- the invention relates to the field of metallurgy and relates to a method for removing scale and Rust layers of metallic Umformgut.
- wire drawing process involves the previous cleaning process the semifinished product usually referred to as wire rod a significant role. It is well known that wire rod covered with oxide, hydroxide, scale or the like is. These, mainly from the hot forming process Surface coatings must be carefully before pulling be removed because their presence is not just one much higher wear of the drawing tools and a significant reduction in the possible pulling speed but also a strong quality reduction of the pull to pulling wire.
- the mechanical cleaning methods can be used during Wire drawing usually in three in the drawing direction each other subdivide the following cleaning areas.
- the wire rod In the first cleaning area of the wire rod is through a winding distance of two at an angle of 90 ° offset roll assemblies positively guided, whereby the wire both mutually and in two rotated by 90 ° levels is bent and thus the brittle scale layers more or less flake off the metal surface.
- wire brush systems are around the wire rod arranged and usually brush tangentially the Wire surface.
- the disadvantage here is the very complex Mechanics of the brush drive driving system, the high acquisition and maintenance costs and the lack of reliability of these systems due to the dusty environment and at the same time high Performance requirements.
- Another disadvantage of this Arrangements is that in addition to technical facilities for automatic compensation of the game are to be provided since due to the high load of the brushes also their permanent high wear results.
- Another disadvantage of this Brush systems is that the wire rod surface Mechanically processed by the strong effect of the brushes is that in the immediate vicinity of the surface due to high temperatures and occasional high temperatures following rapid cooling microstructural changes up to the Martening result.
- the invention has for its object to provide a reliable, cost-effective, technologically simple and environmentally friendly feasible method for removing scale and To provide rust layers of metallic Umformgut, in which damage to the surface and texture of the Forming good is avoided.
- the method is characterized in that with a Scale layer and / or rust layer associated with forming material a closed layer of a lubricant is wrapped, that the Umformgut so wrapped for the purpose of detachment of Scale layer and / or rust layer of the metallic forming material a cross-section reducing forming with a Forming degree of> 3% is subjected and that after this Forming the existing on the Umformgut Lubricant coating together with the contained therein Parts of the scale layer and / or rust layer is removed.
- This can be an inlet nozzle and an outlet nozzle for and outlet of the Umformgutes, wherein the outlet nozzle may advantageously be a forming tool.
- the lubricant in the lubricant chamber under the Condition of a fixed or adjustable pressure applied to the forming material the lubricant externally supplied under the action of pressure of the lubricant chamber becomes.
- the Lubricant pressure measured in the lubricant chamber and the Measured values are used to control and regulate the Pulling speed and / or the process temperature used.
- the lubricant pressure in the lubricant chamber and / or the inlet nozzle so large be chosen that part of the lubricant against the Transport direction of the formed material through the annular gap is pressed between the inlet nozzle and Umformgut.
- the lubricant chamber can be advantageous liquefied or in a pasty state transferred solid lubricant can be used. It can the Solid lubricant under the action of pressure and / or Temperature in the liquid or pasty state be transferred.
- the detachment of the Scale layer and / or rust layer of the metallic forming material by choosing the degree of deformation, the geometry of the Forming tools, the type and thickness of the lubricant coating and / or the forming speed controlled.
- the process step of detaching the scale layer and / or rust layer can according to the invention one or more Forming tools are used.
- the lubricant envelope together with the parts of the scale layer contained therein and / or Rust layer is removed by a cleaning process.
- a liquid can be used become.
- the cleaning process is a heated Fed to forming material.
- the removal of the lubricant sheath together with the parts of the scale layer contained therein and / or rust layer can also be realized in that the cylindrical guide length L of the single or the last Forming tool with L ⁇ 0.3 d is selected, wherein d the Diameter of the expiring formed material is.
- the Lubricant coating as a result of the short Guide length caused rapid drop in pressure immediately on Output of the forming tool automatically from the forming material blasted off.
- the inventive method is distinguished from the State of the art by several significant advantages.
- the new process is also characterized by a high Reliability with simultaneous low wear of the Device system off.
- the invention is based on a Embodiment explained in more detail.
- the example relates to the cleaning of a wire rod of the Steel brand C40 with a nominal diameter of 5.5 mm. Of the Wire has a closed roll resulting from hot rolling Scale layer on.
- the Lubricant chamber is pressurized filled solid lubricant.
- the lubricant becomes the Lubricant chamber by means of an external Lubricant supply device under the action of Pressure supplied.
- the pressure in the lubricant chamber is on set a value of 600 bar and during the Pulling the wire rod through the lubricant chamber kept constant via a control device.
- the outlet nozzle of the lubricant chamber is as a drawing die formed, with which the scaled, in the Lubricant chamber with lubricant coated wire rod on a diameter of 4.75 mm is drawn.
- This Diameter reduction occurs an ideally uniform Stretching of the wire rod, which has the consequence that the scale layer separates from the wire rod and into small Laminated parts break, which of the lubricant coating be recorded.
- the wire thus treated is immediately after leaving from the lubricant chamber with rotating plastic brushes as well subjected to a fine cleaning with a compressed air blower. Then there is a wire completely cleaned of scale 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)
Abstract
Description
Claims (16)
- Verfahren zum Entfernen von Zunder- und Rostschichten von metallischem Umformgut, dadurch gekennzeichnet, dass das mit einer Zunderschicht und/oder Rostschicht behaftete Umformgut mit einer geschlossenen Schicht eines Schmierstoffs umhüllt wird, dass das so umhüllte Umformgut zum Zwecke des Loslösens der Zunderschicht und/oder Rostschicht vom metallischen Umformgut einer querschnittsvermindernden Umformung mit einem Umformgrad von > 3 % unterworfen wird und dass nach diesem Umformen die auf dem Umformgut vorhandene Schmierstoffumhüllung zusammen mit den darin enthaltenen Teilen der Zunderschicht und/oder Rostschicht entfernt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das mit einer Zunderschicht und/oder Rostschicht behaftete Umformgut zur Umhüllung mit dem Schmierstoff durch eine Schmierstoffkammer gezogen wird.
- Verfahren nach der Anspruch 2, dadurch gekennzeichnet, dass eine Schmierstoffkammer verwendet wird, die eine Einlaufdüse und eine Auslaufdüse für den Ein- und Austritt des Umformgutes aufweist.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass eine Schmierstoffkammer verwendet wird, deren Auslaufdüse ein Umformwerkzeug ist.
- Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Schmierstoff in der Schmierstoffkammer unter der Bedingung eines fest eingestellten oder regelbaren Druckes auf das Umformgut aufgebracht wird, wobei der Schmierstoff extern unter Einwirkung von Druck der Schmierstoffkammer zugeführt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass der Schmiermitteldruck in der Schmierstoffkammer gemessen und die Messwerte zur Steuerung und Regelung der Ziehgeschwindigkeit und/oder der Prozesstemperatur herangezogen werden.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Schmierstoffdruck in der Schmierstoffkammer und/oder die Einlaufdüse so groß gewählt werden, dass ein Teil des Schmierstoffs entgegen der Transportrichtung des Umformgutes durch den Ringspalt zwischen Einlaufdüse und Umformgut gedrückt wird.
- Verfahren nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass in der Schmierstoffkammer ein verflüssigter oder in einen pastenförmigen Zustand überführter Festschmierstoff verwendet wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der Festschmierstoff unter der Einwirkung von Druck und/oder Temperatur in den flüssigen oder pastenförmigen Zustand überführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Loslösen der Zunderschicht und/oder Rostschicht vom metallischen Umformgut durch die Wahl des Umformgrades, die Geometrie der Umformwerkzeuge, die Art und Dicke der Schmierstoffumhüllung und/oder die Umformgeschwindigkeit gesteuert wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass für die Verfahrensstufe des Loslösens der Zunderschicht und/oder Rostschicht ein oder mehrere Umformwerkzeuge eingesetzt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Schmierstoffumhüllung zusammen mit den darin enthaltenen Teilen der Zunderschicht und/oder Rostschicht durch einen Reinigungsprozess entfernt wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass beim Reinigungsprozess eine Flüssigkeit verwendet wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass dem Reinigungsprozess ein erwärmtes Umformgut zugeführt wird.
- Verfahren nach Anspruch 1 und 11, dadurch gekennzeichnet, dass zum Entfernen der Schmierstoffumhüllung zusammen mit den darin enthaltenen Teilen der Zunderschicht und/oder Rostschicht die zylindrische Führungslänge L des einzigen oder des letzten Umformwerkzeuges mit L < 0,3 d gewählt wird, worin d der Durchmesser des auslaufenden Umformgutes ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass ein erwärmter oder gekühlter Schmierstoff verwendet wird.
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 true EP1579928A1 (de) | 2005-09-28 |
EP1579928B1 EP1579928B1 (de) | 2010-02-24 |
Family
ID=34745458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05102316A Not-in-force EP1579928B1 (de) | 2004-03-26 | 2005-03-23 | Verfahren zum Entfernen von Zunder- und Rostschichten von metallischem Umformgut |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1579928B1 (de) |
AT (1) | ATE458562T1 (de) |
DE (2) | DE102004015975B3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (1)
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 |
Citations (7)
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 |
FR2702973A1 (fr) * | 1993-03-23 | 1994-09-30 | 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 |
EP0796675A1 (de) * | 1995-10-11 | 1997-09-24 | Nisshin Steel Co., Ltd. | Verfahren zum entzudern von stahlbandcoils durch walzen mit hohem waltzdruck |
-
2004
- 2004-03-26 DE DE102004015975A patent/DE102004015975B3/de not_active Expired - Fee Related
-
2005
- 2005-03-23 AT AT05102316T patent/ATE458562T1/de active
- 2005-03-23 DE DE502005009059T patent/DE502005009059D1/de active Active
- 2005-03-23 EP EP05102316A patent/EP1579928B1/de not_active Not-in-force
Patent Citations (7)
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 |
FR2702973A1 (fr) * | 1993-03-23 | 1994-09-30 | Trefileurope France Sa | Procédé et dispositif de décalaminage d'un fil métallique. |
EP0796675A1 (de) * | 1995-10-11 | 1997-09-24 | Nisshin Steel Co., Ltd. | Verfahren zum entzudern von stahlbandcoils durch walzen mit hohem waltzdruck |
DE19540602A1 (de) * | 1995-10-31 | 1997-05-07 | Kloeckner Stahl Gmbh | Verfahren zum Entzundern von warmgewalztem Edelstahl-Bandmaterial |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 006, no. 153 (M - 149) 13 August 1982 (1982-08-13) * |
PATENT ABSTRACTS OF JAPAN vol. 006, no. 236 (M - 173) 25 November 1982 (1982-11-25) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
ATE458562T1 (de) | 2010-03-15 |
DE502005009059D1 (de) | 2010-04-08 |
DE102004015975B3 (de) | 2005-08-11 |
EP1579928B1 (de) | 2010-02-24 |
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