EP1707284B1 - Method for the production of defect-free calibrated steel bars - Google Patents

Method for the production of defect-free calibrated steel bars Download PDF

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Publication number
EP1707284B1
EP1707284B1 EP05701668A EP05701668A EP1707284B1 EP 1707284 B1 EP1707284 B1 EP 1707284B1 EP 05701668 A EP05701668 A EP 05701668A EP 05701668 A EP05701668 A EP 05701668A EP 1707284 B1 EP1707284 B1 EP 1707284B1
Authority
EP
European Patent Office
Prior art keywords
bars
machining
bar
cracks
stage
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.)
Active
Application number
EP05701668A
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German (de)
English (en)
French (fr)
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EP1707284A1 (en
Inventor
Lluis Pascual Ventosa
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.)
Calibrados de Precision SA
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Calibrados de Precision SA
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Publication date
Application filed by Calibrados de Precision SA filed Critical Calibrados de Precision SA
Publication of EP1707284A1 publication Critical patent/EP1707284A1/en
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Publication of EP1707284B1 publication Critical patent/EP1707284B1/en
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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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • 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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • 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

  • This invention is intended to provide information about a process for the manufacture of defect-free gauged steel bars and the industrial installation which brings about the aforesaid process.
  • the hot rolled steel that is the so-called rod, from which the scale produced in hot rolling has been cleaned off, is passed through a die which has a reducing cone and a cylindrical gauging part, leaving the wire rounder and with a particular diameter tolerance of the order of 0.1 mm and a smoother surface.
  • the crack detection systems using induced currents used in these combined machines are capable of detecting defects having minimum depths of approximately 0.15 mm, with the result that bars shaped by this process may have defects of that depth.
  • the process of turning bars consists of passing the rod through the heads of multiple static or rotary cutters which by removing turnings reduce the diameter of the rod, leaving it rounder and with lower tolerance, and removing most of the surface defects typical of hot rolled rod with the turnings.
  • US Patent 4 545 227 describes an apparatus for dry continuous wire drawing in which the surface flaws of the wire are eliminated after each detection or alternatively they are marked in case of not being possible to be removed. However no feed-back is used in order to eventually change the diameter of the incoming wire.
  • US Patent 4 037 446 discloses a method of producing bright steel from rolled steel wire providing a first stage of reduction of the diameter of the steel wire by calibration, straightening the wire and imparting to the wire a radial bending force moving in a circle above the wire.
  • Patents abstracts of Japan 57 171 515 discloses a surface flaw removing method combining an automatic crack finder with an automatic cutting device which cuts the wire surface only in the flaw position before the final winding of the wire.
  • Patent abstracts of Japan 59 142 054 discloses a method and device for removing surface flaws on wire rods combining a crack detector with a grinding device to remove the surface flaws of the wire.
  • US Patent 5 582 051 discloses an automatic flaw cutting method, and apparatus for wire-shaped metal, to prevent overlooking of flaws rectifying the twist of a wire-shaped metal drawn from a canon-shaped wire supply stand, applying an automatic flaw-cutting process and removing the uncut flaws by hand.
  • Patent abstracts of Japan 04 238 621 discloses a device and method for manufacturing wire rod in which the rod is straightened and descaled prior to drawing and flaw detection, removing the flaws by an automatic flaw-repairing device before the spheroidizing and annealing of the wire rod in a treating furnace.
  • this invention provides a process in which the hot rolled rod proceeds from the spool to a pre-straightening and subsequent descaling operation, then proceeds to a combined stage of gauging by drawing and an intermediate crack monitoring process to detect the depth of defects in the bar in relation to a calibrated depth, these defects being subsequently removed in a machining operation with turnings being removed to a depth greater than that gauged by the detection equipment.
  • the detection equipment is set to a depth corresponding to the defects experimentally detected in the bars and the bars are machined, removing part of the material corresponding to the detection depth plus a specific excess so as to achieve greater safety when wholly cleaning the bar, the said detection zone detecting any areas in which the defects are greater than the gauge for the detection equipment, producing bars which will be automatically separated at the end of the process in accordance with universally known methods for identifying defects in bars of a continuous type in order ultimately to locate bars incorporating defects and to allow them to be eliminated.
  • all defects within the gauge value of the detection equipment will be removed automatically in the stage of turning the bars, which will remove a quantity of material corresponding to the gauged depth plus a small safety margin.
  • the process will therefore make it possible to guarantee that there are no surface defects which can be detected by existing monitoring equipment.
  • the process to which this invention relates will include the possibility of feeding results back to the cold gauging stage of the installation because if the number of bars rejected during the final stage as a result of intermediate sorting is very high the machining depth will be increased, simultaneously changing the gauging die to a larger diameter to enable the material to have sufficient excess for cracks to be removed, and so that the nominal diameter for the gauged bar can be achieved. Obviously, if no rejects at all are produced, this will mean that the equipment must be gauged to a lower value, avoiding excessive losses of material due to removal of the turnings.
  • Figure 1 shows a diagram of the set of components involved in this invention.
  • Figure 2 shows diagrammatically the interrelationship between bar diameters from the starting rod to the final gauged bar with the corresponding excesses.
  • the process begins with the spool -1- of hot rolled rod from which the rod is drawn, after which there is a pre-straightening stage 2- and subsequently the stage -3- of eliminating surface residues or scale using shot blasting or brush systems, yielding the straightened and descaled bar - 4- which then goes to a drawing gauging stage which incorporates a die and a pulling unit represented by the number -5-.
  • the gauged rod -6- then goes onto the control system -7- which is calibrated to detect cracks at a particular depth, identifying those locations on the continuous bar where areas having defects greater than the machine's gauge have been located.
  • the gauged rod then passes to the machining system -8- in which a surface part of the bar which is slightly greater than the gauge for the monitoring system is removed mechanically, with the result that surface defects are systematically removed.
  • the rod then passes to the cutting stage -9-, after which it is passed to the straightening unit -10-, passing finally through the bar selection zone -11- where bars which fulfil the specified conditions -12- are regarded as being marketable bars and defective bars -12'- in which defects of depth greater than the machine gauge have been detected will be eliminated.
  • Figure 2 shows diagrammatically the process in which will be seen the diameter - ⁇ b- of the rod after cold drawing incorporating multiple defects due to surface cracks such as -d1-, -d2-, -d3-, etc., which lie within the gauge value ⁇ A ⁇ for the machine. It is possible that some defects such as -d4- will be greater than the gauge value, giving rise to a reference mark in the detection zone which will bring about automatic rejection of the bar at the end of the line.
  • the crack detection machine is calibrated to the value -A- indicated in the graph, and turning is carried out with removal of the excess -B- which comprises the gauge -A- plus a small safety surplus - ⁇ - shown in the graph, giving rise finally to the nominal diameter - ⁇ n - of the bar which it is desired to obtain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Wire Processing (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • General Factory Administration (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
EP05701668A 2004-01-23 2005-01-13 Method for the production of defect-free calibrated steel bars Active EP1707284B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200400139A ES2222839B1 (es) 2004-01-23 2004-01-23 Procedimiento para la fabricacion de barras de acero calibradas libres de defectos e instalacion para su fabricacion.
PCT/ES2005/000013 WO2005070578A1 (es) 2004-01-23 2005-01-13 Procedimiento para la fabricación de barras de acero calibradas libres de defectos e instalación para su fabricación

Publications (2)

Publication Number Publication Date
EP1707284A1 EP1707284A1 (en) 2006-10-04
EP1707284B1 true EP1707284B1 (en) 2009-12-02

Family

ID=34354862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05701668A Active EP1707284B1 (en) 2004-01-23 2005-01-13 Method for the production of defect-free calibrated steel bars

Country Status (10)

Country Link
US (1) US20060156779A1 (pt)
EP (1) EP1707284B1 (pt)
JP (1) JP2007518574A (pt)
AT (1) ATE450326T1 (pt)
BR (1) BRPI0506145A (pt)
CA (1) CA2536001A1 (pt)
DE (1) DE602005018018D1 (pt)
ES (2) ES2222839B1 (pt)
WO (1) WO2005070578A1 (pt)
ZA (1) ZA200601901B (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012011509A1 (de) 2012-06-09 2013-12-12 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer gestuften Stange sowie gestufte Stange

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10339191A1 (de) * 2003-08-22 2005-03-17 Sms Demag Ag Coilbox zwischen Vorstraße und Fertigstraße im Warmwalzwerk
IT1401449B1 (it) * 2010-06-10 2013-07-26 Trafilerie Brambilla S P A Metodo ed impianto per la produzione di barre di acciaio inossidabile e/o di leghe inossidabili trafilate a freddo.
DE102019206878A1 (de) * 2019-05-13 2020-11-19 Sms Group Gmbh Ziehanlage zur Erzeugung von Metallprofilen sowie Verfahren zum automatischen Betrieb einer solchen Ziehanlage
CN112809030B (zh) * 2020-12-30 2022-02-15 重庆工业职业技术学院 应用于机加工设备的塑料废料收集装置及其设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702937A (en) * 1950-10-17 1955-03-01 Gordon E Smart Rod machine and process
DE2120550B2 (de) * 1971-04-27 1974-09-05 Th. Kieserling & Albrecht, 5650 Solingen Anlage zur Querschnittsminderung von Stranggut wie beispielsweise Walzdraht
FR2317023A1 (fr) * 1975-07-19 1977-02-04 Kieserling & Albrecht Procede pour la fabrication d'ebauches d'acier blanc, a partir de fil lamine ou de troncons de ce fil
JPS6028611B2 (ja) * 1981-04-11 1985-07-05 株式会社神戸製鋼所 引抜ラインにおける線材の表面疵取り方法
JPS58221611A (ja) * 1982-06-18 1983-12-23 Sumitomo Metal Ind Ltd 線材の乾式連続伸線装置
FR2540246A1 (fr) * 1983-01-28 1984-08-03 Solmer Dispositif pour detecter des criques sur les brames d'acier sortant d'une coulee continue
JPS59142054A (ja) * 1983-01-28 1984-08-15 Sumitomo Metal Ind Ltd 線材の表面疵取方法および装置
JPH04238621A (ja) * 1991-01-08 1992-08-26 Sumitomo Metal Ind Ltd 線材の連続製造装置及び線材の連続製造方法
US5582051A (en) * 1994-03-03 1996-12-10 Nippon Koshuha Steel Co., Ltd. Automatic flaw-cutting method and apparatus for wire-shaped metal
US6153131A (en) * 1996-05-13 2000-11-28 Huang; Yean-Jenq Method for designing an extrusion process and die

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012011509A1 (de) 2012-06-09 2013-12-12 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer gestuften Stange sowie gestufte Stange
DE102012011509B4 (de) 2012-06-09 2022-12-15 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer gestuften Stange sowie gestufte Stange

Also Published As

Publication number Publication date
ATE450326T1 (de) 2009-12-15
EP1707284A1 (en) 2006-10-04
JP2007518574A (ja) 2007-07-12
ES2222839B1 (es) 2005-10-01
WO2005070578A1 (es) 2005-08-04
BRPI0506145A (pt) 2006-10-24
US20060156779A1 (en) 2006-07-20
ES2335109T3 (es) 2010-03-22
ES2222839A1 (es) 2005-02-01
CA2536001A1 (en) 2005-08-04
DE602005018018D1 (de) 2010-01-14
ZA200601901B (en) 2007-07-25

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