SE519170C2 - Process of producing closed cured profiles without cross-sectional limitations - Google Patents

Process of producing closed cured profiles without cross-sectional limitations

Info

Publication number
SE519170C2
SE519170C2 SE0200682A SE0200682A SE519170C2 SE 519170 C2 SE519170 C2 SE 519170C2 SE 0200682 A SE0200682 A SE 0200682A SE 0200682 A SE0200682 A SE 0200682A SE 519170 C2 SE519170 C2 SE 519170C2
Authority
SE
Sweden
Prior art keywords
blank
hydroforming
cross
time
hydraulic fluid
Prior art date
Application number
SE0200682A
Other languages
Swedish (sv)
Other versions
SE0200682L (en
SE0200682D0 (en
Inventor
Mats A Bergman
Finn Olsen
Original Assignee
Finnveden Technology Ab
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 Finnveden Technology Ab filed Critical Finnveden Technology Ab
Priority to SE0200682A priority Critical patent/SE0200682L/en
Publication of SE0200682D0 publication Critical patent/SE0200682D0/en
Priority to EP03445005A priority patent/EP1342515A1/en
Publication of SE519170C2 publication Critical patent/SE519170C2/en
Publication of SE0200682L publication Critical patent/SE0200682L/en

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
    • 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
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Method for the manufacture of closed, hardened steel sections by hydroforming, a blank being placed in a substantially enclosing forming tool and openings in the blank being closed and connections for hydraulic fluid being provided to the inside of the blank and fluid being pumped into the blank at high pressure so that the blank is deformed according to the forming tool, the fluid being removed and the blank being hardened by heating and subsequent cooling. <IMAGE>

Description

20 25 30 519 170 2 ämne som placeras i fonnverktyget och trycksätter det så att det formas på en kort tid till önskad form. Formningstiden är vanligen kortare än 3 sek och företrädesvis kortare än 1 sekund för att ämnet inte ska hinna ta härdning under forrnningen genom kontakten med tryckrnediet och det kylda fonnverktyget. Den formade produkten tillåts dock vara i kontakt med fonnverktyget och tryckmediet tillräckligt länge för att hinna ta härdning innan produkten sedan tas ur fonnverktyget. Substance which is placed in the mold tool and pressurizes it so that it is formed in a short time into the desired shape. The forming time is usually shorter than 3 seconds and preferably shorter than 1 second so that the blank does not have time to cure during the molding through the contact with the pressure medium and the cooled mold. However, the shaped product is allowed to be in contact with the mold tool and the printing medium long enough to have time to cure before the product is then removed from the mold tool.

Beskrivning Föreliggande uppfinning avser en process innefattande kombinerad hydrofonnning och efterhärdning.Description The present invention relates to a process comprising combined hydroforming and post-curing.

I en hydroformningsprocess pressar en hydraulisk vätska ut ett ämne mot ett väsentligen omslutande forrnverktyg samtidigt som ett mekaniskt tryck påförs ämnet för att förflytta ämnets material till de områden där det saknas material. På föreskrivet sätt erhålls en fonnförändring av ärrmet efter verktygets fonn.In a hydroforming process, a hydraulic fluid presses a blank against a substantially enclosing mold tool while a mechanical pressure is applied to the blank to move the material of the blank to the areas where there is no material. In the prescribed manner, a shape change of the scar is obtained after the shape of the tool.

I hydroformningsprocessen används ett ämne, i härdbart stål, som forrnmässigt kan anpassas till efterföljande processteg genom att exempelvis bocka ärrmet eller med arman förformning anpassa ämnet. Ämnet placeras i ett formverktyg med önskad form, som väsentligen omsluter ärrmet. Ãrnnet, exempelvis i form av ett rör tätas därefter i båda ändar och en hydraulisk vätska, företrädesvis vatten pumpas in och trycksätter röret samtidigt som ett mekaniskt tryck anbringas i båda ändar av änmet.In the hydroforming process, a blank is used, in hardenable steel, which can be formally adapted to subsequent process steps by, for example, bending the sleeve or adapting the blank with the arm preform. The blank is placed in a forming tool of the desired shape, which substantially encloses the sleeve. The tube, for example in the form of a tube, is then sealed at both ends and a hydraulic fluid, preferably water is pumped in and pressurizes the tube at the same time as a mechanical pressure is applied at both ends of the tube.

I hydroformningsprocessen erhålls önskad form genom formförändring av ämnet, varefter vattnet avlägsnas från fonnverktyget och även ämnet som i nästa processteg värms upp i en ugn till härdtemperatur. Ämnet placeras vidare i ett fixerverktyg för att ämnet ska bibehålla sin form under den kommande avkylningsfasen, där det uppvärmda ämnet kyls ned med lämpligt media, såsom vatten eller olja. En härdad fonnad produkt har nu erhållits genom de ovan närrmda processtegen.In the hydroforming process, the desired shape is obtained by changing the shape of the blank, after which the water is removed from the mold and also the blank which in the next process step is heated in an oven to a curing temperature. The substance is further placed in a fi xer tool so that the substance retains its shape during the coming cooling phase, where the heated substance is cooled down with suitable media, such as water or oil. A cured formed product has now been obtained through the process steps discussed above.

Den formade härdade produkten behöver nu endast slutbearbetas genom ändbearbetning och upptagning av hål, vilket utförs av klippverktyg eller med laserskäming. 10 15 20 25 30 ø o n - ua 519 110 ß Föredragen utföringsform I det följande skall uppfinningen närmare beskrivas i anknytning till de exempel på utförande som visas i bifogad figur.The shaped hardened product now only needs to be finished by end machining and picking up holes, which is performed by cutting tools or with laser cutting. 10 15 20 25 30 ø o n - ua 519 110 ß Preferred embodiment In the following, the invention will be described in more detail in connection with the examples of embodiments shown in the attached fi gur.

Figur 1 visar ett flödesschema över en hydroforrnningsprocess med härdning.Figure 1 shows a flow chart of a hydroforming process with curing.

Nedan beskrivs en process beträffande hydroforrrming där ett ärrme ska formas till en färdig slutprodukt.Below is a process regarding hydroforming where a sleeve is to be formed into a finished end product.

I processen används företrädesvis ett ärrme i form av ett rör, av härdbart stål såsom exempelvis borstål, som forrnmässigt kan anpassas till efterföljande processteg.In the process, a sleeve in the form of a tube, of hardenable steel such as, for example, boron steel, is preferably used, which can be formally adapted to subsequent process steps.

Röränmet placeras i ett omslutande fonnverktyg med önskad fonn. Rörämnet tillsluts därefter i båda ändarna och anslutningar för hydraulisk vätska till ämnets inre anordnas varefter en hydraulisk vätska, företrädesvis vatten pumpas in med ett högt tryck av ca 2000 bar som trycksätter rörärrmet, samtidigt som ett mekaniskt tryck på ca 150 ton anbringas i båda ändama av rörärrmet. Dessa tryck påverkar rörärnnet under minst 30 sekunder, företrädesvis under cirka 60 sekunder som formar rörämnet efter verktyget med en temperatur på rörärrmet och verktyget lägre än 100 °C, företrädesvis rumstemperatur. Presskraften som åtgår för att sluta verktyget under processen är ca. 5000 ton.The tube end is placed in an enclosing mold tool with the desired shape. The pipe blank is then closed at both ends and connections for hydraulic fluid to the interior of the blank are arranged, after which a hydraulic fluid, preferably water is pumped in with a high pressure of about 2000 bar which pressurizes the pipe arm, while a mechanical pressure of about 150 tons is applied at both ends of the tube sleeve. These pressures affect the pipe pipe for at least 30 seconds, preferably for about 60 seconds which forms the pipe blank after the tool with a temperature on the pipe pipe and the tool lower than 100 ° C, preferably room temperature. The pressing force required to close the tool during the process is approx. 5000 tons.

I hydroforrnningsprocessen erhålls den önskade formen på rörärrmet. Vattnet avlägsnas från fonnverktyget och även ämnet som i nästa processteg värms upp i en ugn till en härdtemperatur på ca 900 °C. Uppvärmningsprocessen pågår under ca 50 sekunder.In the hydroforming process, the desired shape of the tube sleeve is obtained. The water is removed from the mold tool and also the substance which in the next process step is heated in an oven to a curing temperature of about 900 ° C. The heating process lasts for about 50 seconds.

För att rörämnet ska bibehålla sin form under den kommande avkylningsfasen placeras rörämnet i ett fixerverktyg. Rörämnet fixeras på ett lämpligt antal områden och/eller punkter, med ett mekaniskt fixertryck på ca 50 ton, varvid det uppvärmda ämnet kyls ned med ett lämpligt media, såsom vatten eller olja. Kylmedlet sprutas på röränmet från ett antal olika riktningar, under ca 30 sekunder med ett tryck på ca 10 bar, varvid det uppvärmda rörämnet kyls ner till ca 40 °C.In order for the tube blank to maintain its shape during the coming cooling phase, the tube blank is placed in a fi x tool. The tube blank is xered on a suitable number of areas and / or points, with a mechanical xer pressure of about 50 tons, whereby the heated substance is cooled down with a suitable medium, such as water or oil. The coolant is sprayed on the pipe blank from a number of different directions, for about 30 seconds with a pressure of about 10 bar, whereby the heated pipe blank is cooled down to about 40 ° C.

Härdningsprocessen i regel tar kortare tid än hydroformningsprocessen. Det vill säga att processen med att hårda änmet efter hydroformningen ryms under den tid hydroformningsprocessen tar, vilket leder till en kostnadseffektiv samlad process. ..- 519 170 | u o n - | o n o» u - » ~ y. 4 Föreliggande uppfinning är inte begränsat till ett enkelt rörämne med två öppningar i vardera änden, utan processen kan även användas till änmen med en betydligt komplexare form och som även tillåter färre eller fler antal öppningar i ämnet än två.The curing process usually takes less time than the hydroforming process. That is, the process of hardening the duct after hydroforming takes place during the time the hydroforming process takes, which leads to a cost-effective overall process. ..- 519 170 | u o n - | 4 The present invention is not limited to a simple tube blank with two openings at each end, but the process can also be used for the blank with a much more complex shape and which also allows fewer or fewer openings in the blank than two. .

Claims (1)

1. 0 15 20 5 19 1 7 Û få _? . . 5 o o u ø n n. Patentkrav . Sätt vid framställning av slutna härdade stålprofiler genom hydroformning kännetecknat av att ett ämne placeras i ett väsentligen omslutande forrnverktyg, öppning i ämnet tillsluts och anslutningar för hydraulisk vätska till ämnets inre anordnas, vätska pumpas in i ämnet till högt tryck så att ämnet formas efler formverktyget, vätskan avlägsnas och ämnet härdas genom upphettning och påföljande avkylning. . Sätt enligt krav l kännetecknat av att den hydrauliska vätskan är vatten. . Sätt enligt krav 1 kännetecknat av att temperaturen vid fommingen är företrädesvis rumstemperatur. . Sätt enligt krav 1 kännetecknat av att ett högt tryck inne i ämnet upprätthålls under minst 30 sekunder, företrädesvis cirka 60 sekunder. . Sätt enligt krav 1 kännetecknat av att tiden för härdningsprocessen tar företrädesvis kortare tid än tiden för hydroformningsprocessen.1. 0 15 20 5 19 1 7 Û få _? . . 5 o o u ø n n. Patent claims. Method of manufacturing closed hardened steel profiles by hydroforming characterized in that a blank is placed in a substantially enclosing mold tool, an opening in the blank is closed and connections for hydraulic fluid to the inner member are arranged, liquid is pumped into the blank to high pressure so that the blank is formed the liquid is removed and the substance is cured by heating and subsequent cooling. . A method according to claim 1, characterized in that the hydraulic fluid is water. . Method according to Claim 1, characterized in that the temperature during the formation is preferably room temperature. . A method according to claim 1, characterized in that a high pressure inside the blank is maintained for at least 30 seconds, preferably about 60 seconds. . A method according to claim 1, characterized in that the time for the curing process preferably takes less time than the time for the hydroforming process.
SE0200682A 2002-03-07 2002-03-07 Process of producing closed cured profiles without cross-sectional limitations SE0200682L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0200682A SE0200682L (en) 2002-03-07 2002-03-07 Process of producing closed cured profiles without cross-sectional limitations
EP03445005A EP1342515A1 (en) 2002-03-07 2003-01-17 Process for the manufacture of closed, hardened sections with no cross-sectional limits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0200682A SE0200682L (en) 2002-03-07 2002-03-07 Process of producing closed cured profiles without cross-sectional limitations

Publications (3)

Publication Number Publication Date
SE0200682D0 SE0200682D0 (en) 2002-03-07
SE519170C2 true SE519170C2 (en) 2003-01-21
SE0200682L SE0200682L (en) 2003-01-21

Family

ID=20287185

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0200682A SE0200682L (en) 2002-03-07 2002-03-07 Process of producing closed cured profiles without cross-sectional limitations

Country Status (2)

Country Link
EP (1) EP1342515A1 (en)
SE (1) SE0200682L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018281A1 (en) 2007-04-18 2008-10-23 Volkswagen Ag Tool for hydroforming, comprises tool base body with suitable deformation chamber for hydroforming, and heating unit is provided for heating of deformation chamber
DE102011051965A1 (en) * 2011-07-20 2013-01-24 Benteler Automobiltechnik Gmbh Method for producing a tubular structural component for a motor vehicle and structural component
DE102016107952B4 (en) * 2016-04-28 2018-07-12 Schuler Pressen Gmbh Method for manufacturing a component, component and press for manufacturing a component
DE102017223374A1 (en) 2017-12-20 2019-06-27 Bayerische Motoren Werke Aktiengesellschaft Method for producing a profile component and profile component

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA9295B (en) * 1991-01-11 1992-10-28 Scambia Ind Dev Ag Process for the production of a double-walled pipe section and apparatus for carrying out such a process
DE19642824A1 (en) * 1996-10-17 1998-04-23 Hermann Bartels Method and device for deforming metal hollow profile workpieces
GB2332163B (en) * 1997-12-13 2002-03-13 Gkn Sankey Ltd A hydroforming process
DE10012974C1 (en) * 2000-03-16 2001-03-15 Daimler Chrysler Ag Production of a hollow profile used in the automobile industry comprises a cold forming a hollow profile green body, heating to a temperature above the austenite temperature
CA2342702A1 (en) * 2001-04-04 2002-10-04 Copperweld Canada Inc. Forming method using tube blanks of variable wall thickness

Also Published As

Publication number Publication date
SE0200682L (en) 2003-01-21
EP1342515A1 (en) 2003-09-10
SE0200682D0 (en) 2002-03-07

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