EP0405065A2 - Procédé pour la fabrication de profilés creux rectangulaires en acier à épaisseur de paroi différente - Google Patents

Procédé pour la fabrication de profilés creux rectangulaires en acier à épaisseur de paroi différente Download PDF

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Publication number
EP0405065A2
EP0405065A2 EP90106263A EP90106263A EP0405065A2 EP 0405065 A2 EP0405065 A2 EP 0405065A2 EP 90106263 A EP90106263 A EP 90106263A EP 90106263 A EP90106263 A EP 90106263A EP 0405065 A2 EP0405065 A2 EP 0405065A2
Authority
EP
European Patent Office
Prior art keywords
wall thickness
circumference
same wall
centers
rectangular hollow
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Withdrawn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
EP90106263A
Other languages
German (de)
English (en)
Other versions
EP0405065A3 (en
Inventor
Klaus Knäpper
Herbert Dipl.-Ing. Pollman
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.)
Fried Krupp AG Hoesch Krupp
Original Assignee
Fried Krupp AG Hoesch Krupp
Hoesch AG
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 Fried Krupp AG Hoesch Krupp, Hoesch AG filed Critical Fried Krupp AG Hoesch Krupp
Publication of EP0405065A2 publication Critical patent/EP0405065A2/fr
Publication of EP0405065A3 publication Critical patent/EP0405065A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • 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
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non-circular section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/024—Method or apparatus with local heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/032—Rolling with other step
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49623—Static structure, e.g., a building component
    • Y10T29/49625—Openwork, e.g., a truss, joist, frame, lattice-type or box beam

Definitions

  • Rectangular closed hollow profiles are known in a wide variety of applications and can be found e.g. as construction elements in steel and mechanical engineering, as a boom in crane construction and as beams and frame elements for transport vehicles.
  • These hollow profiles are usually hot or cold profiled from round tubes and show a high load capacity with a relatively low weight.
  • the flanges i.e. the horizontal side parts and the webs, i.e. the vertical side parts of such hollow profiles, show the same wall thicknesses and thus a uniform distribution of the masses over the circumference.
  • Such hollow profiles are usually assembled from individual sheets of different wall thicknesses for flanges and webs and joined together.
  • angle irons are first manufactured and cut to length as hot-rolled profiles, then positioned in mirror-image relation to each other and welded with two diagonally opposite longitudinal seams.
  • the submerged arc welding process commonly used here whose welding speed is around two to three meters per minute, reduces the production speed sustainably and requires subsequent annealing of the weld seam areas, which reduces the undesirable structural changes or welding stresses caused by the welding heat and the uncontrolled cooling.
  • EP 0 084 799 B1 shows another method for producing hollow profiles with different wall thicknesses over the circumference. These hollow profiles serve as internally cooled guide elements for continuous casting and are also profiled by forming a round tube.
  • the method for changing the wall thickness described in this document in the context of a further development either consists in mechanically machining a completely formed rectangular hollow profile or guide element on one side and thus reducing the wall thickness, or in symmetrically reshaping a front pipe with already different wall thicknesses .
  • the change in wall thickness serves primarily for better heat transfer for the intended purpose.
  • the disadvantage of the method based on mechanical processing described lies in the inefficiency which arises from the large outlay on manufacturing devices and production time and from the high amount of chips and scrap.
  • DE-PS 843 834 Another process for the production of hollow bodies of different wall thicknesses is disclosed in DE-PS 843 834, in which the shaping is carried out by hot drawing or hot pressing generally round pipes of uniform wall thickness.
  • the round exit tubes are heated non-uniformly over the circumference so that the temperatures are lower in the circumferential areas which are subjected to great tensile stresses during the drawing process than in the areas which have to absorb compressive stresses during the drawing.
  • This procedure prevents the occurrence of undesired constrictions in wall thickness, e.g. B. in the corners of drawn rectangular profiles, but also allows the production of hollow profiles with different wall thicknesses.
  • the latter is achieved by heating the areas which are more deformed with respect to the final shape, ie thinned here, if an internal mandrel is additionally used during the hot draft.
  • the invention was therefore based on the object of specifying a process for the production of rectangular hollow profiles with different wall thicknesses, which only uses pipes or profiles which are simply produced in series as a preliminary product and, without the need for joining or machining, simply redistributes the volume or mass in terms of plant technology of standard profiles "in the strand", d. i.e., made possible in continuous processing as well as in individual production.
  • the inventive method idea is to first transform a welded or seamless round tube of uniform wall thickness into a rectangular hollow profile of uniform wall thickness and then to effect a targeted redistribution of the masses by rolling processes with the aid of a local thermal influence on the material strength.
  • the center of the flange is raised to a temperature level that is at least 600 ° C higher than the center of the web, while the flanges are compressed and thickened perpendicularly to the longitudinal axis of the hollow profile while reducing their edge length with the aid of roller rollers.
  • a further advantage of this procedure is in particular that, due to the compression and thickening of the flanges, strain hardening is avoided in a high temperature range and the machining forces are many times greater than the cold deformation caused by rolling or drawing reduce.
  • Strain hardening - especially in the edge area - and roll or forming forces can advantageously be further minimized if the initial forming of the e.g. welded or seamless pipe of the same wall thickness in the warm, i.e., at a forming temperature of 900 ° C to 1,050 ° C and the subsequent temperature difference required for targeted mass distribution between the center of the flange and the center of the web before forming to a rectangular hollow profile with a non-uniform wall thickness over the circumference is generated by partially cooling the center of the web to 200 ° C to 450 ° C using water and / or air.
  • the rectangular hollow profiles of the same wall thickness formed from the round tubes of the same wall thickness at a temperature of 900 ° C to 1,050 ° C to a cooling process under normalization conditions and then to subject them Heat the middle of the flange to a temperature which is at least 600 ° C higher than that of the web by partial annealing.
  • the flanges are then again compressed and thickened perpendicularly to the longitudinal axis of the hollow profile by reducing their edge length by rolling.
  • Thermal energy then has serious economic advantages if the, for example, welded or seamless pipe is shaped into a rectangular hollow profile of the same wall thickness at room temperature and then by partial annealing the flange centers to a temperature that is at least 600 ° C higher than the center of the web and the targeted further compression and thickening of the Flanges is adjusted by rolling.
  • the subsequent processing steps are then added at different times as required by feeding the individual lengths to a roll in which the targeted mass distribution is achieved by partially annealing the flange centers to a temperature which is at least 600 ° C higher than the center of the web.
  • a welded round endless tube 1 with the same wall thickness over the circumference is guided in the production direction 2 into an induction annealing system 3 which completely heats the tube.
  • the temperature of the round tube 1 is approximately 975 ° C.
  • the roll stands 5, 6 and 7 deform the tube 1 into a rectangular hollow profile of the same wall thickness 8.
  • the hollow profile 8 is subjected to cooling under normalization conditions on the subsequent cooling section 9 and has a temperature of 210 ° C. at the exit point 10 from the cooling section 9.
  • the line inductors 11 and 12 which heat the flange centers of the upper flange 13 and the lower flange 14 to a temperature of 920 ° C., follow in the production direction 2.
  • the hollow profile 8 then enters the compression frame 15, which carries the deliverable form rollers 16 and 17 and the fixed support rollers 18 and 19.
  • the flanges 13 and 14 are compressed and thickened perpendicularly to the longitudinal axis 20 of the hollow profile while reducing the edge length of the flanges.
  • the rectangular hollow profile 21, now provided with different wall thicknesses runs into the cooling section 22, in which it is cooled with air to room temperature under normalization conditions.
  • a flying saw 23 then cuts the hollow profile 21 into individual lengths.
  • FIG. 2 again shows the function and the roller arrangement of the compression frame 15 in principle.
  • the deliverable upsetting rollers 16 and 17 are concavely calibrated to avoid web dents and upsets the flanges 13 and 14, which are guided by the support rollers 18 and 19 so that the height dimension 24 of the hollow profile with different wall thicknesses than that of the hollow profile 8 with over the circumference corresponds to the same wall thicknesses and the thickening of the flanges 13 and 14 takes place by mass displacement to the respective inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP19900106263 1989-06-30 1990-04-02 Method of producing rectangular hollow sections of steel with differential wall thickness Withdrawn EP0405065A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921456 1989-06-30
DE3921456A DE3921456A1 (de) 1989-06-30 1989-06-30 Verfahren zur herstellung von rechteckigen hohlprofilen unterschiedlicher wanddicke

Publications (2)

Publication Number Publication Date
EP0405065A2 true EP0405065A2 (fr) 1991-01-02
EP0405065A3 EP0405065A3 (en) 1991-02-06

Family

ID=6383966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900106263 Withdrawn EP0405065A3 (en) 1989-06-30 1990-04-02 Method of producing rectangular hollow sections of steel with differential wall thickness

Country Status (8)

Country Link
US (1) US5040399A (fr)
EP (1) EP0405065A3 (fr)
DE (1) DE3921456A1 (fr)
ES (1) ES2019271A4 (fr)
FI (1) FI902418A7 (fr)
GR (1) GR910300065T1 (fr)
NO (1) NO902051L (fr)
RU (1) RU1806030C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102764791A (zh) * 2012-07-31 2012-11-07 广东和胜工业铝材股份有限公司 不可热处理强化铝合金矩形管的制造方法
CN101344193B (zh) * 2007-03-14 2013-05-15 株式会社库尼特克 一种管状产品及其制造方法和生产设备
EP2399685A4 (fr) * 2009-01-14 2015-12-23 Nippon Steel & Sumitomo Metal Corp Élément creux, et dispositif de fabrication et procédé de fabrication de celui-ci
EP2470315B1 (fr) * 2009-08-28 2017-08-02 Vallourec Deutschland GmbH Procédé de fabrication de profilés creux à petits rayons d'arêtes par laminage à chaud
CN110449478A (zh) * 2019-07-26 2019-11-15 安徽鑫旭新材料有限公司 一种铜排精密冷挤压成型模具

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
US5907969A (en) * 1997-03-19 1999-06-01 Soder; James T. Tool for working shaped, hollow metal tubing to achieve an end reduction
US6722037B2 (en) * 2001-12-06 2004-04-20 Shape Corporation Variable thickness tubular doorbeam
US6644701B2 (en) 2002-01-14 2003-11-11 Shape Corporation Bumper energy absorber with foam and non-foam pieces
US6672635B2 (en) * 2002-06-06 2004-01-06 Netshape Corporation Bumper with integrated foam and non-foam components
US7290337B2 (en) * 2002-07-12 2007-11-06 Mitsubishi Materials Corporation Manufacturing method for frame body and frame body
US7578109B2 (en) * 2004-08-31 2009-08-25 Gossamer Space Frames Space frames and connection node arrangement for them
DE102007013174A1 (de) * 2007-03-20 2008-09-25 Bpw Bergische Achsen Kg Verfahren zum Herstellen eines aus gegeneinander gesetzten Profilen bestehenden Achskörpers
US8479552B1 (en) * 2007-05-22 2013-07-09 Temper Ip, Llc Method and die for forming a tubular blank into a structural component
US8484845B2 (en) * 2009-09-18 2013-07-16 Cpumate Inc. Method of manufacturing a heat conducting structure having a coplanar heated portion
DE102010012830B4 (de) * 2010-03-25 2017-06-08 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung einer Kraftfahrzeugkomponente und Karosseriebauteil
US9174263B2 (en) 2012-05-23 2015-11-03 Temper Ip, Llc Tool and shell using induction heating
US9656317B1 (en) 2014-02-03 2017-05-23 Temper Ip, Llc Stamp, mold, quench of aluminum and magnesium sheet
US11021768B2 (en) 2016-11-30 2021-06-01 L&W Engineering Shaped boron tubular structure support
CN112588818B (zh) * 2020-11-27 2023-01-24 中北大学 一种大型带内筋带导轨的矩形型材制造方法

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US368622A (en) * 1887-08-23 sa ndford
US1019968A (en) * 1910-07-27 1912-03-12 Phenix Tube Company Tube-forming mechanism.
US2085829A (en) * 1935-05-08 1937-07-06 Harry E Rogers Method of making beams
DE843834C (de) * 1944-04-19 1952-07-14 Deutsche Edelstahlwerke Ag Verfahren und Vorrichtung zum Ziehen von Hohlkoerpern
US2780000A (en) * 1951-07-16 1957-02-05 Combustion Eng Method of thickening tube wall
GB778422A (en) * 1955-01-03 1957-07-10 Stewarts & Lloyds Ltd Manufacture of steel or other metal tubes
FR1267303A (fr) * 1960-06-10 1961-07-21 Tubes De La Providence Soc D Procédé et dispositif pour le profilage de tubes
SU584946A2 (ru) * 1976-07-15 1977-12-25 Ворошиловградский машиностроительный институт Способ изготовлени полых железнодорожных осей
DE2805729C2 (de) * 1978-02-08 1986-02-20 Mannesmann AG, 4000 Düsseldorf Verfahren zum Herstellen von Vorwerkstücken für Achskörperhälften von Nutzfahrzeugen
JPS58125332A (ja) * 1982-01-22 1983-07-26 Kubota Ltd 偏平中空筒状体の製造方法
JPS611413A (ja) * 1984-06-15 1986-01-07 Nippon Kokan Kk <Nkk> 大径厚肉鋼管の製造方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101344193B (zh) * 2007-03-14 2013-05-15 株式会社库尼特克 一种管状产品及其制造方法和生产设备
EP2399685A4 (fr) * 2009-01-14 2015-12-23 Nippon Steel & Sumitomo Metal Corp Élément creux, et dispositif de fabrication et procédé de fabrication de celui-ci
EP2470315B1 (fr) * 2009-08-28 2017-08-02 Vallourec Deutschland GmbH Procédé de fabrication de profilés creux à petits rayons d'arêtes par laminage à chaud
CN102764791A (zh) * 2012-07-31 2012-11-07 广东和胜工业铝材股份有限公司 不可热处理强化铝合金矩形管的制造方法
CN110449478A (zh) * 2019-07-26 2019-11-15 安徽鑫旭新材料有限公司 一种铜排精密冷挤压成型模具

Also Published As

Publication number Publication date
FI902418A7 (fi) 1990-12-31
GR910300065T1 (en) 1991-11-15
DE3921456A1 (de) 1991-01-10
EP0405065A3 (en) 1991-02-06
DE3921456C2 (fr) 1993-05-19
FI902418A0 (fi) 1990-05-15
NO902051D0 (no) 1990-05-09
NO902051L (no) 1991-01-02
RU1806030C (ru) 1993-03-30
US5040399A (en) 1991-08-20
ES2019271A4 (es) 1991-06-16

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