EP3523064A1 - Procédé de fabrication d'un élément tube haute résistance - Google Patents

Procédé de fabrication d'un élément tube haute résistance

Info

Publication number
EP3523064A1
EP3523064A1 EP17776982.5A EP17776982A EP3523064A1 EP 3523064 A1 EP3523064 A1 EP 3523064A1 EP 17776982 A EP17776982 A EP 17776982A EP 3523064 A1 EP3523064 A1 EP 3523064A1
Authority
EP
European Patent Office
Prior art keywords
tube part
strength
producing
tube
sheet metal
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Withdrawn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
EP17776982.5A
Other languages
German (de)
English (en)
Inventor
Markus Pfestorf
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3523064A1 publication Critical patent/EP3523064A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/22—Machines specially designed for operating on pipes or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • 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
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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
    • C21D2261/00—Machining or cutting being involved

Definitions

  • the present invention relates to a method for producing a high-strength tube part according to the preamble of the independent
  • tube creates connection possibilities directly in the sheet metal part or in the component, so that additional fastening means, such.
  • Threaded bushings, etc. can be dispensed with.
  • the tube is integral, d. H. integrally integrated in the sheet metal part. To introduce the tube in the sheet metal part, so far only soft steels can be used as the starting material of the sheet metal blank. Thus, such tube parts have a low overall strength. As known from the prior art
  • Tubular parts have a low strength in order to achieve relatively high degrees of deformation, they are unsuitable for use as structural and safety components.
  • the invention proposes a method for
  • Tubes parts find in the so-called load thread of the body shell, which should ensure the protection of the occupants in the event of a crash.
  • the curing of the tube part can take place in a hot-forming step.
  • This offers the advantage that tube parts with a tensile strength in the range of> 1300 MPa can be produced.
  • the hot forming step in the sense of this invention is understood to mean that the
  • a mechanical processing in particular the introduction of threads into the tube, takes place after the tube part has hardened, wherein the tube part has softer and harder sections.
  • the tube or region in which mechanical processing takes place corresponds to a section of the tube part which is soft after the hardening step. In this area, the tube part has low
  • the tube part can have strength values which correspond to the strength value of the material of the output plate. This can advantageously be a particularly simple mechanical processing, in which the wear of the
  • Machining tool is reduced to a minimum.
  • - to ensure a rework of the possible thread in the tube - leave this section of the tube or the tube part in a soft state or subsequently annealed in this section.
  • This can be done by typical methods of making soft sections in hot worked or press hardened parts.
  • Such measures may be, for example, the use of an absorber mass or a heat shield in the oven in which the already
  • cold-formed tube part is heated.
  • a 3-D heat radiator with which only the areas of the cold-formed tube part to be hardened are heated, non-hardening areas not being detected by the 3-D radiator.
  • measures can also be achieved in the hot forming step or during press hardening. In these measures, a part of the forming tool is heated or a thermal insulation between the heated
  • Tubenteil and the hot forming tool for example in the form of an air gap provided.
  • the component undergoes a slower cooling in this area, so that set in this section, a lower strength.
  • measures can be taken on the hardened component, whereby, for example, inductive tempering causes certain sections of the high-strength tube part to be heated, as a result of which the high strength initially achieved by hardening in this region is again reduced.
  • a heat-formable steel in particular 22MnB5
  • 22MnB5 a heat-formable steel
  • This is a martensitic hardenable tempered steel whose high-strength properties are only established during hot forming by transformation into a martensitic microstructure.
  • the strength of manganese steel grades is about 600 MPa. After their hardening, for example by hot working, a tensile strength up to about 1800 MPa can be achieved.
  • Conventional manganese drilling steels contain the following alloying elements:
  • the hot-workable steel of the board can be provided with a corrosion protection layer, wherein the board or the coil is precoated.
  • a corrosion protection layer in a
  • the coating is optionally on the board, on the cold-formed tube part or on the high-strength tube part.
  • the subsequent coating offers a particularly good sheathing of the complete tube part, and thus a particularly high corrosion protection.
  • coatings are particularly suitable aluminum-silicon coatings, zinc coatings, etc.
  • Tubular parts with a yield strength> 950 MPa and a tensile strength> 1300 MPa can be produced with this invention. This is achieved by the use according to the invention of the indirect hot forming or the two-stage hot forming process for producing such tube parts. In this process, boards are first cut from a coil of thermoformable material. Thereafter, the boards are cold formed, creating an uncured tube part.
  • cold forming takes place in several steps, wherein successively in 10-20 pressing the component is converted to its final geometry.
  • the blanks are formed using numerous drawing stages. In general, deep drawing of the board occurs in a first pull stage.
  • Forming stages are introduced with the help of die and male tube sections in the deep-drawn board, so that a tube part with its final shape is formed successively. If necessary, a thread can be introduced in a final press step of cold forming.
  • the forming in the cold state offers higher degrees of freedom with respect to
  • the tube part can be machined, for example by introducing threads or by trimming to a desired contour. It also punch holes and
  • the cold-formed tube parts are heated in an oven to the austenitizing temperature of about 900 ° C.
  • the tube part can be completely heated, or only certain portions of the tube part are heated, with other sections are not heated or only slightly heated.
  • After heating in the oven is a rapid cooling of the tube part.
  • the cooling takes place in a tool, which on the one hand increases the strength of the steel and, on the other hand, calibrates the geometry of the component. In this tool, in which the component is cooled, can optionally take place Restumformung. If only individual areas of the tube part were heated in the oven, a rapid increase in cooling will only increase the strength in the previously warmed up areas. Unheated areas or areas just below the
  • Strength values are generated to the immediate units, such as gearbox, engine, engine mounts, mountings for axle and the like, can be mounted. This can in the vehicle a
  • Weight savings are achieved and additional assembly processes, such as mounting nuts omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément tube haute résistance, comprenant les étapes consistant à : fabriquer une platine pour tôle, fabriquer un élément tube par formage à froid de la platine pour tôle, caractérisé par l'étape de trempe au moins de parties de l'élément tube afin d'obtenir un élément tube haute résistance.
EP17776982.5A 2016-10-05 2017-09-22 Procédé de fabrication d'un élément tube haute résistance Withdrawn EP3523064A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016219278.7A DE102016219278A1 (de) 2016-10-05 2016-10-05 Verfahren zur Herstellung eines hochfesten Tubenteils
PCT/EP2017/073965 WO2018065230A1 (fr) 2016-10-05 2017-09-22 Procédé de fabrication d'un élément tube haute résistance

Publications (1)

Publication Number Publication Date
EP3523064A1 true EP3523064A1 (fr) 2019-08-14

Family

ID=59974408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17776982.5A Withdrawn EP3523064A1 (fr) 2016-10-05 2017-09-22 Procédé de fabrication d'un élément tube haute résistance

Country Status (5)

Country Link
US (1) US11131002B2 (fr)
EP (1) EP3523064A1 (fr)
CN (1) CN109414742A (fr)
DE (1) DE102016219278A1 (fr)
WO (1) WO2018065230A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220402010A1 (en) * 2020-03-16 2022-12-22 Nikkeikin Aluminium Core Technology Company, Ltd. Die set and processing method using die set

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891804A (en) * 1954-12-16 1959-06-23 John S Frayne Vehicle body rigidifying device and mounting for passenger harness
JPH07103420B2 (ja) * 1990-04-05 1995-11-08 住友金属工業株式会社 ボロン鋼板を素材とする部材の製造方法
JPH06256854A (ja) * 1993-03-05 1994-09-13 Nippon Steel Corp 曲がりの少ない超高張力電縫鋼管の製造方法
FR2780984B1 (fr) 1998-07-09 2001-06-22 Lorraine Laminage Tole d'acier laminee a chaud et a froid revetue et comportant une tres haute resistance apres traitement thermique
DE19941993C1 (de) * 1999-09-02 2000-12-14 Benteler Werke Ag Verfahren zur Herstellung eines biegesteifen torsionsweichen Rohrprofils als Querträger für eine Verbundlenkerhinterachse eines Personenkraftwagens
JP4319828B2 (ja) * 2002-11-18 2009-08-26 新日本製鐵株式会社 超音波衝撃処理による冷間加工部の強度向上方法およびその金属製品
CN1738687A (zh) * 2003-01-20 2006-02-22 新日本制铁株式会社 金属箔管及其制造方法与制造装置
US20040145140A1 (en) * 2003-01-29 2004-07-29 Amos Chen Twist car
US20050081964A1 (en) * 2003-10-21 2005-04-21 Urband Bruce E. A Method Of Establishing Stress Relieving Procedures For Minimizing Sulfide Stress Cracking In Cold Worked Metals
PT1790422E (pt) * 2004-09-15 2012-05-25 Nippon Steel Corp Peça com elevada resistência, e processo para produção da mesma
PT2517949E (pt) * 2007-04-04 2014-03-17 Nippon Steel & Sumitomo Metal Corp Membro resistente para uma carroçaria de automóvel
US7845061B2 (en) * 2007-05-16 2010-12-07 Frank's International, Inc. Low clearance centralizer and method of making centralizer
DE102008025165B4 (de) * 2008-05-26 2013-06-06 Elisabeth Braun Antriebsbauteil
DE102010048209C5 (de) * 2010-10-15 2016-05-25 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines warmumgeformten pressgehärteten Metallbauteils
KR101119173B1 (ko) * 2011-09-30 2012-02-22 현대하이스코 주식회사 레이저 열처리를 이용한 이종강도를 갖는 강 제품 제조 방법 및 이에 이용되는 열처리 경화강
US8919867B2 (en) * 2013-03-14 2014-12-30 Honda Motor Co., Ltd. Front pillar garnish
WO2015017212A1 (fr) * 2013-08-01 2015-02-05 Antelope Tools & Mfg., Co., Llc Centreur tubulaire roulé
MX2017000077A (es) * 2014-06-27 2017-05-30 Ati Properties Llc Tubos de aleacion resistentes a la corrosion de formacion por flujo y tubo manufacturado por los mismos.
US20170136874A1 (en) * 2015-08-23 2017-05-18 Brian Harris Off road vehicle

Also Published As

Publication number Publication date
US11131002B2 (en) 2021-09-28
CN109414742A (zh) 2019-03-01
DE102016219278A1 (de) 2018-04-05
US20190226042A1 (en) 2019-07-25
WO2018065230A1 (fr) 2018-04-12

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