EP3085471A1 - Procede de fabrication d'un composant structural et dispositif de laminage correspondant - Google Patents

Procede de fabrication d'un composant structural et dispositif de laminage correspondant Download PDF

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Publication number
EP3085471A1
EP3085471A1 EP16160667.8A EP16160667A EP3085471A1 EP 3085471 A1 EP3085471 A1 EP 3085471A1 EP 16160667 A EP16160667 A EP 16160667A EP 3085471 A1 EP3085471 A1 EP 3085471A1
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EP
European Patent Office
Prior art keywords
metal strip
rolling
rolling direction
profiling
produced
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
Application number
EP16160667.8A
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German (de)
English (en)
Other versions
EP3085471B1 (fr
Inventor
Selahattin Türel Memili
Igor Licko
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.)
Ford Global Technologies LLC
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Ford Global Technologies LLC
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Filing date
Publication date
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Publication of EP3085471A1 publication Critical patent/EP3085471A1/fr
Application granted granted Critical
Publication of EP3085471B1 publication Critical patent/EP3085471B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/12—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/18—Automatic gauge control
    • B21B37/20—Automatic gauge control in tandem mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B21H8/005—Embossing sheets or rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B21B2261/043—Blanks with variable thickness in the rolling direction

Definitions

  • the present invention relates to a method for producing a structural component, in particular for motor vehicles, wherein a metal strip having a plurality of rolls arranged one behind the other in succession groups of upper and lower rolls is rolled such that the metal strip can be produced with a varying thickness.
  • the EP 2 111 937 A1 discloses a method for the production of thickness-varying, sheet-metal laminates, in particular for the production of components for motor vehicles.
  • a sheet metal blank with a varying thickness is prefabricated as the starting workpiece.
  • the sheet metal plate is partially reworked, so embossed with an embossing stamp, so that the thickness of the sheet metal plate which already has a variable thickness is changed locally.
  • EP 2 208 555 B1 there is described a rolling method and a rolling apparatus for producing a metal strip having a thickness varying over its width. Groups of rolls are passed in the rolling direction of the metal strip.
  • Core of EP 2 208 555 B1 should be that the metal strip is bent out of its original direction of movement at a first puncture along a rolling on the metal strip surface of a piercing rolling tool, wherein the metal strip is bent beyond its yield point. This would result in a favorable structural change in the material.
  • the bend must run exactly transversely to the metal strip, so that the Breitungswiderstand would be lowered, resulting in a slight flow of material of the material displaced during the puncture in the width direction.
  • a rolling process for the formation of thickness-profiled, one-piece rolling stock, in which the starting material is converted by means of the width of the rolling stock to different depths penetrating into the starting material rolls in the width direction, is in of the DE 101 13 610 C2 disclosed. It is proposed that a deformation of the starting material is carried out in regions and is formed by defined superimposition of the forming a three-dimensional, both in the longitudinal direction and in the width direction arbitrary thickness profile. In one embodiment, this describes the DE 101 13 610 C2 a rolling device whose rollers are arranged in the form of a triangle one behind the other, wherein the contact surfaces of the rollers complement each other in such a way that a closed impression is introduced into the sheet metal part.
  • Another method for producing a material connection is the friction spot welding method, the weld refilled (Refill Friction Stir Spot Welding (RFSSW)).
  • RFSSW Refill Friction Stir Spot Welding
  • This is a welding process in which little heat is introduced into the material. By a rotating tool, a frictional heat is generated to plasticize the material. So be Welding performed at about 400-450 ° C for aluminum alloys and thus prevents the hot cracking and high hydrogen solubility of aluminum, which has a melting temperature of about 660 ° C. For aluminum alloys, a low-heat joining process should be preferred in order to ensure a high quality of the joint.
  • the resistance spot welding method is the fastest compared to SPR and RFSSW in terms of connection time.
  • the resistance spot welding method has a not very good welding quality, due to the complete melting of the joint with aluminum alloys.
  • SPR is faster than a connection using RFSSW, SPR is very unattractive due to the immense rivet bolt costs and possible contact corrosion.
  • several rivets would have to be used depending on the thickness of the joint.
  • the connection method by means of RFSSW is therefore a particularly good alternative to the connection method by means of SPR. This is especially true if the connection surfaces decrease in thickness.
  • the duration for the preparation of the compound in the two methods SPR and RFSSW is approximately the same, but eliminated in the process by means of RFSSW harmful contact corrosion and also the particularly high material costs of the variety of rivet bolts omitted.
  • connection surface ie, for example, an edge-side flange should be as small as possible, ie thin.
  • a metal strip with different thicknesses in the longitudinal direction can be produced.
  • the metal strip can also have different thicknesses in the width direction.
  • three-dimensional thickness profiling are possible, as the DE 101 13 601 C2 teaches.
  • several punctures and successively and juxtaposed roles are required for this, with even complicated heights and Position settings are necessary. In this respect, there is still room for improvement in processes for producing structural components for motor vehicles.
  • the invention is therefore based on the object of specifying a method of the aforementioned type, with which a metal strip in all directions, ie in the X and Y directions, can be produced with different thicknesses.
  • the invention is also based on the object of specifying a rolling device which is suitable for carrying out the method.
  • a metal strip is rolled with a plurality of groups of top and bottom rolls arranged one behind the other in a rolling direction such that the metal strip can be produced with a varying thickness.
  • the metal strip in all directions, ie in the X, Y and Z directions have a different thickness.
  • the profiling can be applied either only on the upper roll, only on the lower roll or on upper and lower rolls.
  • a metal strip is prefabricated, which due to the shape-changing profiling generated partial contours to a desired Final contour has.
  • the metal strip having the desired final contour is fed further processing steps.
  • the metal sheet is produced with the desired final contour in a continuous rolling process.
  • the final contour is produced in one pass of the metal strip, wherein a sheet is rolled with both different thicknesses in the longitudinal direction and in the transverse direction, said thickness distribution arbitrary, so optimized is
  • the metal strip is produced with the desired final contour, this can be rolled up into a coil, and thus fed to a further processing step.
  • the metal strip produced with the final contour can be formed and / or cured in a further processing step.
  • the metal strip produced with the final contour can be thermoformed or press-hardened (hot-forming quenching, HFQ).
  • the metal strip produced with the final contour can be trimmed in a further processing step, in order to obtain e.g. so to get the structural component with its gauge blocks.
  • a laser cutting method can be used, which allows very precise cuts.
  • the final contour is cut out together with a connecting surface.
  • the connecting surface may be referred to as a flange, which may be made particularly thin with the method according to the invention.
  • other areas of the metal strip provided with the final contour are, as provided according to the invention, variable in their thickness.
  • B-pillars can be produced. These have in the middle thickening, so reinforcements in order to withstand the corresponding loads occurring. Laterally, the connecting surfaces or flanges are arranged, which are thinner than the region of the reinforcement. But the reinforcement itself can vary in thickness.
  • an exemplary B-pillar at a lower region merely by way of example a seen in supervision larger, so wider reinforcement region than at an upper, the width seen in supervision does not decrease continuously, but after a constriction can also increase again.
  • other structural components for motor vehicles can be produced with the method according to the invention, that is, produced.
  • crash-optimized structural components For example, side members can be produced with the method according to the invention at certain, ie previously defined points with lower material thicknesses, so that the component fails in a crash at this optimized point.
  • the inventive method is quite advantageous because the additional, so subsequent step is eliminated. This further reduces costs, but also conserves energy and resources through lower material consumption.
  • the metal strip can be produced with the desired final contour in one pass, whereby previously predetermined, three-dimensional end contours can be generated.
  • the rollers completely overlap the metal strip transversely to the rolling direction, the upper and lower rollers of the individual groups laterally projecting beyond the metal strip.
  • the top and / or bottom rolls of each group have shape-changing profiles in the rolling direction, wherein the respective shape-changing profiling of each group has a respectively constant volume.
  • the first profiled upper and / or lower roll seen in the rolling direction has a narrower but deeper profiling than the subsequent upper and / or lower rolls of the following groups. It is also expedient that the profiles of the upper and / or lower rolls following the first group of upper and / or lower rolls are wider and narrower than the profilings of the upper and / or lower rolls respectively upstream in the rolling direction. It is particularly favorable that the successive profilings despite the changes in shape have an unchanged volume.
  • the upper and / or lower rollers of the first group has a narrower but deeper profiling than the subsequent group of upper and / or lower roller, which has a broader and shallower profiling.
  • the profiling are introduced as a depression in the upper and / or lower roller.
  • elevations it is also possible for elevations to be provided, the volume of which in the rolling direction remains bleaching even in the case of elevations, with the shape changing.
  • the nip between the top and bottom rollers is executed accordingly, so adjusted.
  • Both the lower roller and the upper roller have a profiling.
  • the metal strip has a partial contour which is relatively thick and narrow when the profiling is introduced as a depression in the relevant roll.
  • the sub-contour is always wider, but also flatter, which also applies to the metal strip.
  • At least the upper and lower rollers seen in the rolling direction have a width such that the rollers overlap the metal strip laterally. With this last group of upper and lower rollers, the final contour can be produced.
  • the B-pillar is produced by a continuous rolling process, ie with targeted rollers, targeted thickness ranges are set can be so that in the end only precise cut must be in order to obtain the desired B-pillar profile.
  • targeted rollers ie with targeted rollers
  • Each successive group of rollers is coordinated and has a different, so changed shape profiling.
  • the shape-changed profiling is worked into the roll surface, so that there is actually a depression.
  • increases can also be provided.
  • FIG. 1 shows a rolling device 1, of which only top rollers 2 shown.
  • the top rollers and bottom rollers form in the rolling direction (arrow 3) successive groups 4 of top and bottom rollers. Between the top rollers 2 and the bottom rollers, a nip is formed, in which a metal strip 5 passes.
  • the top rollers 2, but also the bottom rollers have a profiling 6, which varies in shape as seen in the rolling direction 3, wherein the volume remains the same.
  • the profiles 6 are referred to in the rolling direction 3 in the plane of the drawing from left to right with 6a, 6b and 6c.
  • the first upper roller 2a seen in the rolling direction 3 has a deeper but narrower profiling 6a than the upper roller 2b following in the rolling direction 3.
  • Their profiling 6b of the top roller 2b is in turn deeper and narrower than the profiling 6c of the top roller 2c which in turn follows in the rolling direction 3.
  • top rollers 2 project laterally beyond the metal strip 5 along the rolling direction 3. The same applies to the lower rollers concerned.
  • contours 7 are generated in the metal strip 5, which are designated in the rolling direction 3 in the plane of the drawing from left to right with the reference numerals 7a, 7b and 7c.
  • the contours 7a and / b are intended to be part contours 7a and 7b, wherein the contour 7c can be referred to as end contour 7c.
  • the metal strip 5 is seen in the rolling direction 3 continuously wider, but also thinner, which also applies to the contours 7a, 7b and 7c.
  • a structural component for a motor vehicle can thus be produced in a rolling pass, which is weight-optimized and optimized in terms of load.
  • the structural component can be designed in three dimensions, that is, have different thicknesses in each direction (X, Y, Z and / or oblique direction). This requires a particularly reduced material consumption, wherein the structural component in a rolling pass, for example in the configuration as a B-pillar quasi in its final form can be produced.
  • a B-pillar is produced in a rolling pass, wherein only three groups 4 of top rollers 2 and bottom rollers are shown by way of example.
  • the rolling means may also have more or less than three consecutive groups of rolls.
  • an edge region, ie flange or connection surface 9, can be made very thin, so that a welding connection of the structural component with other components by means of the RFSSW (Refill Friction Stir Spot Welding) can be carried out particularly advantageously.
  • FIG. 3 the structural component 10 produced by the method according to the invention and with the rolling device 1 according to the invention is shown in the exemplary embodiment as a B-pillar, wherein a sheet is rolled with different thicknesses both in the longitudinal direction and in the transverse direction, this thickness distribution being arbitrary, ie optimized.
  • the reinforcing region 11 has a contour which changes from the bottom to the top in the plane of the drawing.
  • the contour can be optimized for crashes but also optimized for weight, which means that over the plane seen in the drawing plane high extension of the B-pillar areas in their material thickness are thicker than others, which are intentionally provided in the crash case failure zones.
  • a very thin edge region 9 can be produced, which significantly reduces the welding time by means of RFSSW.
  • the arranged in the drawing plane for example, each below and above edge regions 9 are produced as welding flanges with a constant thickness, while the middle part of a has any, so optimized thickness distribution.
  • the contour of the B-pillar may also have constrictions 12 in the reinforcing region 11, wherein not only with respect to the constrictions 12 are widenings 13 again configured.
  • the B-pillar is as in FIG. 3 exemplified in a rolling pass with the rolling process and the rolling device 1 produced according to the invention, wherein only a precise Speedetute along the in FIG. 2 recognizable cutting edge 8 was performed from the metal strip.
  • the cutting edge 8 is in FIG. 3 indicated.
  • the metal band 5 may be a metal sheet or a light metal band such as an aluminum sheet.
  • the profiling 6 is almost completely introduced into the top roller 2, that is also in the bottom roller. Only one transition bar 14 is provided.
  • attachment elements such as flanges
  • connection surface 9 of the metal strip 5 provided with the final contour 7c by means of welding methods.
  • laser welding may be provided.
  • This component can be solution annealed and quenched in order to maintain the material properties of eg the aluminum used as a material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Metal Rolling (AREA)
EP16160667.8A 2015-03-19 2016-03-16 Procede de fabrication d'un composant structurel et dispositif de laminage correspondant Active EP3085471B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015204931 2015-03-19

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EP3085471A1 true EP3085471A1 (fr) 2016-10-26
EP3085471B1 EP3085471B1 (fr) 2019-10-02

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US (1) US10518306B2 (fr)
EP (1) EP3085471B1 (fr)
CN (1) CN105983574B (fr)
DE (1) DE102016200520B4 (fr)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
ITUB20160442A1 (it) * 2016-02-04 2017-08-04 Fiat Ricerche Procedimento per la laminazione di lamiere metalliche con spessore variabile
US20180169722A1 (en) * 2016-12-15 2018-06-21 GM Global Technology Operations LLC Systems, methods and devices for 3d rolling of multi-gauge parts
JP6638639B2 (ja) * 2016-12-19 2020-01-29 トヨタ自動車株式会社 差厚金属板の製造方法、プレス部品の製造方法及び加工機

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JPH05123807A (ja) * 1991-10-30 1993-05-21 Hitachi Cable Ltd ヒートシンク付きリードフレーム材の製造方法
JPH07284873A (ja) * 1994-04-18 1995-10-31 Hitachi Cable Ltd ヒートシンク付きリードフレーム材の製造方法
DE19748321A1 (de) 1996-10-31 1998-05-07 Hitachi Cable Verfahren zur Herstellung von Material mit modifiziertem Querschnitt
DE19962754A1 (de) 1999-08-06 2001-02-15 Muhr & Bender Kg Verfahren zum flexiblen Walzen eines Metallbandes
DE10113610C2 (de) 2001-03-20 2003-04-17 Reiner Kopp Verfahren und Walzvorrichtung zur Ausbildung von dickenprofiliertem einstückigem Walzgut
EP2111937A1 (fr) 2008-04-23 2009-10-28 Benteler Automobiltechnik GmbH Procédé de fabrication de platines en tôle à épaisseur variable
EP2208555B1 (fr) 2009-09-25 2012-01-18 DREISTERN GmbH & Co.KG Procédé de laminage et dispositif de laminage pour la fabrication d'une bande de métal ayant une épaisseur variant en largeur
WO2014075115A1 (fr) 2012-11-15 2014-05-22 Julius Blum Gmbh Procédé de fabrication d'un profilé en tôle pour dispositif de guidage de tiroir coulissant ainsi que profilé en tôle et guide de tiroir coulissant fabriqués par ce procédé.

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Publication number Priority date Publication date Assignee Title
JPS56151130A (en) * 1980-04-24 1981-11-24 Tamagawa Kikai Kinzoku Kk Method and apparatus for forming sheet of nonuniform section
JPH05123807A (ja) * 1991-10-30 1993-05-21 Hitachi Cable Ltd ヒートシンク付きリードフレーム材の製造方法
JPH07284873A (ja) * 1994-04-18 1995-10-31 Hitachi Cable Ltd ヒートシンク付きリードフレーム材の製造方法
DE19748321A1 (de) 1996-10-31 1998-05-07 Hitachi Cable Verfahren zur Herstellung von Material mit modifiziertem Querschnitt
DE19962754A1 (de) 1999-08-06 2001-02-15 Muhr & Bender Kg Verfahren zum flexiblen Walzen eines Metallbandes
DE10113610C2 (de) 2001-03-20 2003-04-17 Reiner Kopp Verfahren und Walzvorrichtung zur Ausbildung von dickenprofiliertem einstückigem Walzgut
EP2111937A1 (fr) 2008-04-23 2009-10-28 Benteler Automobiltechnik GmbH Procédé de fabrication de platines en tôle à épaisseur variable
EP2208555B1 (fr) 2009-09-25 2012-01-18 DREISTERN GmbH & Co.KG Procédé de laminage et dispositif de laminage pour la fabrication d'une bande de métal ayant une épaisseur variant en largeur
WO2014075115A1 (fr) 2012-11-15 2014-05-22 Julius Blum Gmbh Procédé de fabrication d'un profilé en tôle pour dispositif de guidage de tiroir coulissant ainsi que profilé en tôle et guide de tiroir coulissant fabriqués par ce procédé.

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Publication number Publication date
DE102016200520A1 (de) 2016-09-22
CN105983574A (zh) 2016-10-05
US10518306B2 (en) 2019-12-31
CN105983574B (zh) 2019-12-10
EP3085471B1 (fr) 2019-10-02
US20160271663A1 (en) 2016-09-22
DE102016200520B4 (de) 2019-10-31

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