EP2548666B1 - Method for producing a profile from sheet metal - Google Patents

Method for producing a profile from sheet metal Download PDF

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Publication number
EP2548666B1
EP2548666B1 EP12171604.7A EP12171604A EP2548666B1 EP 2548666 B1 EP2548666 B1 EP 2548666B1 EP 12171604 A EP12171604 A EP 12171604A EP 2548666 B1 EP2548666 B1 EP 2548666B1
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EP
European Patent Office
Prior art keywords
section
metal strip
sheet metal
middle section
cross
Prior art date
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Not-in-force
Application number
EP12171604.7A
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German (de)
French (fr)
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EP2548666A1 (en
Inventor
Guenter Domani
Christoph Wiedner
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Hilti AG
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Hilti AG
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Publication of EP2548666A1 publication Critical patent/EP2548666A1/en
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    • 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
    • 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
    • B21B1/095—U-or channel sections
    • 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
    • B21B1/098—Z-sections
    • 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
    • B21B1/224—Edge rolling of flat products
    • 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
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Definitions

  • the invention relates to a method for producing a profile from a sheet metal strip according to the preamble of claim 1 (see eg EP-A-2 108 469 ,
  • Roll forming methods are known in which rail profiles are produced from a sheet-metal strip by bending operations. Such a method is for example from the EP0736345A1 out. Furthermore, it is, for example, from the EP2025420A1 and the EP2085163A1 Known to locally reduce the wall thickness of the metal as part of the Walzprofiliervons. In this way, it can be taken into account that, for static reasons, a profile often does not necessarily have to have a wall thickness that is constant over the profile circumference. In particular, in the less loaded sections of the profile, the wall thickness can be partially reduced and thus material can be saved.
  • the object of the invention is to provide a method for producing a profile from a sheet metal strip, which allows for particularly high efficiency and reliability, the production of particularly varied designed profiles.
  • a method for producing a profile from a sheet-metal strip in which the sheet-metal strip is bent at least twice in a first stage, so that, seen in cross-section of the sheet metal strip, a central portion and two flank portions are formed, which from two opposite end portions of the central portion protrude at an angle, and is compressed in a subsequent to the first stage second stage of the central portion by means of two complementary roller assemblies which engage the two opposite end portions of the central portion, while the sheet metal strip is locally thickened.
  • a basic idea of the invention can be seen in bending the sheet-metal strip at least twice and compressing the resulting middle section at its two ends in such a way that local thickening occurs in the region of the middle section.
  • profile cross-sectional areas with increased wall thickness are therefore not obtained by the fact that adjacent areas are thinned, but they are obtained by targeted thickening.
  • the double bending makes it possible to initiate the compression forces particularly easily and reliably in the middle section, since the faces of the opposite end portions of the central portion are freely accessible by the double bending. Since the bends can be introduced at any point in the cross section, according to the invention, the thickenings can be positioned largely freely in cross section.
  • one or more thickenings can be generated at almost any point in the sheet metal strip. It is also economically possible to produce a cross section in which only small areas have a large wall thickness and large areas have a small wall thickness.
  • the inventive method is a cold rolling process, which can be carried out in particular on a cold rolling mill.
  • at least one of the roller assemblies has at least one recess, into which the material in Upsetting process flows in the second stage and thereby generates at least one local thickening.
  • the upsetting takes place in the plane of the middle section, that is to say the upsetting forces act at least approximately parallel to the flat sides of the middle section.
  • the bending takes place about bending axes which run at least approximately parallel to the longitudinal axis of the sheet-metal strip.
  • the at least two fold can be done simultaneously or sequentially.
  • the first stage may also comprise several individual stages.
  • Each roller assembly may comprise one roller or a plurality of coaxially arranged rollers.
  • the sheet-metal strip may in particular be a sheet metal strip.
  • the bending in the first stage can preferably be done by roll forming. In principle, however, other forming techniques are possible.
  • the bending in the first stage can be done in particular without significant influence on the wall thickness, i. in the first stage, the wall thickness changes by a maximum of 10%, preferably a maximum of 5% or 1%, wherein preferably in the first stage only a reduction of the wall thickness and no increase in the wall thickness is provided.
  • the bends are retained and are still present in the finished profile.
  • the profile production can be further simplified.
  • it can be provided to cancel at least one of the bends after upsetting and thickening again.
  • this bend is merely an auxiliary structure for the production of the thickening, which is no longer present in the finished profile.
  • the freedom in the positioning of the thickening is further increased.
  • the first roller arrangement has a first axis of rotation and the second roller arrangement has a second axis of rotation, wherein the axes of rotation are expediently parallel.
  • a nip is formed through which the metal strip is performed.
  • the center section during upsetting, seen in cross-section of the sheet metal strip at least approximately perpendicular to the axis of rotation of the first roller assembly and / or the axis of rotation of the second roller assembly.
  • An at least approximately vertical course is understood to mean that the angle between the middle section, in particular between the flat sides of the central section, and the axes of rotation is 90 ° +/- 10 °, in particular 90 ° +/- 5 °, preferably 90 ° +/- 1 °.
  • the center section is thus guided through the roll gap at least approximately perpendicular to the rolling axes, so that the compression forces applied by the rolls lie in the plane of the center section.
  • a further preferred embodiment of the invention lies in the fact that the first flank section, viewed in cross-section of the sheet-metal strip, protrudes at least approximately at right angles from the middle section, and / or that the second flank section, seen in cross-section of the sheet-metal strip, protrudes at least approximately at right angles from the central section. Due to the rectangular arrangement, on the one hand, the end regions of the middle section for the roller arrangements are particularly easily accessible, so that the outlay on equipment is particularly low. On the other hand, in such an arrangement, the flank sections and / or the middle section can be supported particularly simply and reliably during swaging so that undesirable deformations are avoided.
  • An at least approximately perpendicular projection is understood to mean that the respective flank section and the middle section, in particular the flat sides of the respective flank section and the flat sides of the central section, form an angle of 90 ° +/- 10 °, in particular 90 ° +/- 5 °, preferably Include 90 ° +/- 1 °.
  • Another embodiment of the invention lies in the fact that the two flank sections protrude on opposite flat sides of the middle section from the middle section. Accordingly, the three sections in the cross-section of the sheet metal strip at least approximately form a Z-shape, wherein the two outer legs of the Z-shape are formed by the flank portions and the center leg of the Z-shape through the central portion. According to this embodiment, the two roller assemblies can support the central portion during upsetting on both sides, so that manufacturing precision and manufacturing reliability can be further enhanced.
  • the sheet-metal strip in the second stage is locally thickened on at least one of the end regions of the middle section, in particular in both end regions.
  • This embodiment takes into account that the end regions of the middle section, ie the transition regions between the middle section and the angled flange sections, in a profile are often particularly burdened.
  • the embodiment provides for strengthening of these particularly stressed areas by targeted local thickening.
  • the method according to the invention can also be used with other methods affecting sheet thickness, such as e.g. Strip profile rolls or strip edge upsetting are combined.
  • Strip profile rolls or strip edge upsetting are combined.
  • At least one of the two flank sections, in particular both flank sections, is thinned out of the roller arrangements in the second step.
  • thickenings and thinning are produced in the second stage with the same complementary roller arrangements, so that particularly large wall thickness variations can be produced in the profile with particularly little effort.
  • the middle section In order to thicken larger areas of the sheet-metal strip, it may be advantageous for the middle section to be further compressed by means of two further complementary roller arrangements which act on the two opposite end areas of the middle section in a third step adjoining the second step, thereby enlarging the local thickening , It is also possible to provide further such upsetting steps, so that the middle section is reduced in height several times and the thickening is likewise increased several times.
  • a width of the profile during the upsetting in the second stage can be avoided for example by lateral support rollers and / or by a shoulder in the roller assemblies. Possibly, however, the method can also be carried out without the use of such auxiliary tools or auxiliary geometries.
  • a further advantageous development of the invention is that the sheet-metal strip is bent at least four times in the first stage, so that, seen in cross-section of the sheet metal strip, a further central portion is formed at the opposite end portions each a flank portion protrudes angularly, and that in the at the first stage subsequent second stage, the two central portions are compressed by means of the two complementary roller assemblies. Accordingly, by the two roller assemblies simultaneously compressed two middle sections while the sheet metal strip locally thickened at least two points in cross-section of the sheet metal strip, so that the cost of the process can be further increased.
  • the two middle sections viewed in the cross section of the sheet-metal strip, run at least approximately parallel.
  • the compression force can be introduced particularly effectively in both middle sections at the same time.
  • An at least approximately parallel course is understood to mean that the two middle sections, in particular their flat sides, enclose an angle of less than 10 °, in particular less than 5 ° or 1 °.
  • the sheet metal strip can have a U-shape in regions in the cross-section of the sheet-metal strip, the side legs of the U-shape being formed by the two middle sections and the center leg of the U-shape being formed by the common flank section.
  • a profile shape is generated in the first stage, which includes at least one at least approximately vertical portion, the central portion. Subsequently, this profile shape is guided by complementary roller arrangements, which form a roll gap which is lower than the vertical central portion, which leads to a compression of the central portion.
  • FIGS. 1 to 4 show cross-sectional views of a metal strip in successive process stages of a first embodiment of a method according to the invention.
  • Starting material of the process is an unbent, flat sheet metal strip 1 as in FIG. 1 shown.
  • the sheet metal strip 1 preferably by roll profiling, bent twice, wherein the bending takes place about bending axes, in the longitudinal direction of the sheet metal strip, ie perpendicular to the plane of the FIGS. 1 to 4 extend.
  • the in FIG. 2 shown stepped structure having a central portion 10 and two angularly, in particular at right angles, for this purpose arranged flank sections 13 and 14 obtained, the flank sections 13 and 14 protrude at opposite end portions 23 and 24 from the central portion 10.
  • the two flank sections 13 and 14 in this case point in opposite directions, ie they project from opposite flat sides 17 and 18, respectively, from the middle section 10.
  • a structure which is angled at right angles to the cross section in two sections is obtained, in which the central section 10 is arranged perpendicular to the two flank sections 13 and 14, extending between the two flank sections 13, 14.
  • FIG. 2 deformed sheet metal strip 1 as in FIG. 3 shown guided by a nip formed between two corresponding roller assemblies 43 and 44, wherein the roller assemblies 43 and 44 are each rotatable about a rotation axis 53 and 54, respectively.
  • the sheet-metal strip 1 is passed between the two roller assemblies 43 and 44 that, seen in cross-section of the sheet-metal strip 1, the two flank portions 13 and 14 parallel to the two axes of rotation 53 and 54 and the central portion 10 perpendicular to the two axes of rotation 53 and 54 extend ,
  • the metal strip 1 act, as indicated by the arrows S, parallel to the plane and the flat sides 17, 18 of the central portion 10 directed compression forces on the end portions 23, 24 of the central portion 10, which elevate the central portion 10 in its end regions 23, 24 and thicken.
  • Compression-displaced material can flow into recesses 63 and 64, which are formed on the two roller assemblies 43 and 44 in the region of the end regions 23 and 24, respectively, thereby forming thickenings.
  • the first roller assembly 43 has a smaller diameter portion 91 and a larger diameter portion 92.
  • the second roller assembly 44 has a smaller diameter portion 96 and a larger diameter portion 95, wherein the smaller diameter portion 91 of the first roller assembly 43 opposite the larger diameter portion 95 of the second roller assembly 44 and the larger diameter portion 92 of the first roller assembly 43 to the smaller diameter portion 96 of the second Roller assembly 44 is opposite.
  • the first flank portion 13 is passed and preferably thinned out.
  • the second flank portion 14 is passed and thereby also preferably thinned out.
  • the middle section 10 is supported in the second stage when compressing the two larger diameter portions 95 and 92 which abut the flat sides 17 and 18, transversely to the direction of the compression forces S, so that an undesirable deformation of the central portion 10 is prevented.
  • the second step, ie the compression step, according to an alternative embodiment of the invention is in FIG. 5 shown.
  • the sheet-metal strip is bent four times in the first step, so that two parallel central portions 10 and 11 are obtained, which are connected by a common edge portion 14.
  • the common flank section 14 forms a U-shape with the two central sections 10 and 11 in cross-section.
  • the metal strip has a hat shape in cross section.
  • the central portions 10 and 11 are simultaneously upset and thickened by the two roller assemblies 43, 44.
  • the two roller assemblies 43, 44 are each formed mirror-symmetrically.
  • the first roller assembly 43 has a smaller-diameter portion 71, next to a central diameter larger area 72 and next to a further smaller diameter portion 73.
  • the corresponding second roller arrangement 44 has a diameter-sized region 74, next to it a smaller-diameter region 75 and next to it a further diameter-larger region 76.
  • the areas 71 and 74, 72 and 75 and 73 and 76 are opposite.
  • At least one of the outer edge portions 13 and 15 can be supported laterally by means of support rollers 103 and 105, respectively.
  • These support rollers 103 and 105 may in particular be part of the second roller arrangement 44.
  • One or more lateral support rollers acting on at least one end portion of the sheet metal strip 10 may also be provided in the other described embodiments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Forging (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Metal Rolling (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Profils aus einem Blechband gemäß dem Oberbegriff des Anspruchs 1 (siche z.B. EP-A-2 108 469 .The invention relates to a method for producing a profile from a sheet metal strip according to the preamble of claim 1 (see eg EP-A-2 108 469 ,

Es sind Walzprofilierverfahren bekannt, bei denen durch Biegeoperationen Schienenprofile aus einem Blechband erzeugt werden. Ein solches Verfahren geht beispielsweise aus der EP0736345A1 hervor. Weiterhin ist es, beispielsweise aus der EP2025420A1 und der EP2085163A1 bekannt, die Wandstärke des Metalls im Rahmen des Walzprofilierverfahrens lokal zu reduzieren. Hierdurch kann berücksichtigt werden, dass ein Profil aus statischen Gründen häufig nicht zwingend eine über den Profilumfang konstante Wandstärke aufweisen muss. Insbesondere kann in den weniger belasteten Abschnitten des Profils die Wandstärke partiell reduziert und somit Material eingespart werden.Roll forming methods are known in which rail profiles are produced from a sheet-metal strip by bending operations. Such a method is for example from the EP0736345A1 out. Furthermore, it is, for example, from the EP2025420A1 and the EP2085163A1 Known to locally reduce the wall thickness of the metal as part of the Walzprofilierverfahrens. In this way, it can be taken into account that, for static reasons, a profile often does not necessarily have to have a wall thickness that is constant over the profile circumference. In particular, in the less loaded sections of the profile, the wall thickness can be partially reduced and thus material can be saved.

Bei den vorgenannten Ausdünnverfahren ist der Aufwand umso höher, je grösser der Anteil der auszudünnenden Querschnittsbereiche am Gesamtprofilquerschnitt ist. Damit ist ein Profil, welches nur punktuell eine grosse Wandstärke und im überwiegenden Teil des Querschnitts eine kleine Wandstärke aufweisen soll, mit einem Ausdünnverfahren häufig nicht wirtschaftlich herstellbar. Ferner kann der maximale Blechdickenunterschied, der beim Ausdünnen erreicht werden kann, begrenzt sein.In the aforementioned thinning methods, the greater the proportion of thinned cross-sectional areas on the overall profile cross-section, the higher the effort. This is a profile, which is only occasionally a large wall thickness and in the majority of the cross section should have a small wall thickness, often not economically producible with a thinning process. Furthermore, the maximum sheet thickness difference that can be achieved during thinning can be limited.

Beim lokalen Ausdünnen des Profilblechs in einem Walzprofilierverfahren können im Bereich der Wandstärkenreduktion Materialanhäufungen auftreten. Aus der EP2065532A1 ist bekannt, diese Materialanhäufungen an den Biegungen des Profils vorzusehen. Gemäss der EP2065532A1 sind die Materialanhäufungen aber mit der Wandstärkenreduktion verknüpft, so dass sie häufig nicht frei positioniert werden können.During local thinning of the profile sheet in a roll forming process, accumulations of material may occur in the area of the wall thickness reduction. From the EP2065532A1 It is known to provide these material accumulations on the bends of the profile. According to the EP2065532A1 However, the material accumulations are linked with the wall thickness reduction, so that they often can not be freely positioned.

Aus der WO10009751A1 ist es bekannt, im Rahmen der Profilherstellung die Bandkante des Blechbandes zu stauchen und aufzudicken. Auch hier ist die Wandstärkenverdickung nicht frei positionierbar.From the WO10009751A1 It is known to compress and thicken the band edge of the sheet metal strip in the context of profile production. Again, the wall thickness thickening is not freely positionable.

Aufgabe der Erfindung ist es, ein Verfahren zum Herstellen eines Profils aus einem Blechband anzugeben, welches bei besonders hoher Wirtschaftlichkeit und Zuverlässigkeit die Herstellung besonders vielfältig gestalteter Profile ermöglicht.The object of the invention is to provide a method for producing a profile from a sheet metal strip, which allows for particularly high efficiency and reliability, the production of particularly varied designed profiles.

Die Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a method having the features of claim 1. Preferred embodiments are given in the dependent claims.

Nach der Erfindung ist ein Verfahren zum Herstellen eines Profils aus einem Blechband vorgesehen, bei dem das Blechband in einer ersten Stufe zumindest zweifach umgebogen wird, so dass, im Querschnitt des Blechbandes gesehen, ein Mittelabschnitt sowie zwei Flankenabschnitte gebildet werden, welche von zwei gegenüberliegenden Endbereichen des Mittelabschnitts winklig abstehen, und in einer an die erste Stufe anschliessenden zweiten Stufe der Mittelabschnitt mittels zweier komplementärer Walzenanordnungen, die an den beiden gegenüberliegenden Endbereichen des Mittelabschnitts angreifen, gestaucht wird und dabei das Blechband lokal aufgedickt wird.According to the invention, a method for producing a profile from a sheet-metal strip is provided in which the sheet-metal strip is bent at least twice in a first stage, so that, seen in cross-section of the sheet metal strip, a central portion and two flank portions are formed, which from two opposite end portions of the central portion protrude at an angle, and is compressed in a subsequent to the first stage second stage of the central portion by means of two complementary roller assemblies which engage the two opposite end portions of the central portion, while the sheet metal strip is locally thickened.

Ein Grundgedanke der Erfindung kann darin gesehen werden, das Blechband zumindest zweifach umzubiegen und den dabei entstehenden Mittelabschnitt an seinen beiden Enden so zu stauchen, dass es zu einer lokalen Aufdickung im Bereich des Mittelabschnitts kommt. Erfindungsgemäss werden Profilquerschnittsbereiche mit erhöhter Wandstärke also nicht dadurch erhalten, dass benachbarte Bereiche ausgedünnt werden, sondern sie werden durch gezieltes Aufdicken erhalten. Die zweifache Biegung erlaubt es, die Stauchkräfte besonders einfach und zuverlässig in den Mittelabschnitt einzuleiten, da durch die zweifache Biegung die Stirnseiten der gegenüberliegenden Endbereiche des Mittelabschnitts frei zugänglich sind. Da die Biegungen grundsätzlich an beliebiger Stelle in den Querschnitt eingebracht werden können, können erfindungsgemäss auch die Aufdickungen weitestgehend frei im Querschnitt positioniert werden.A basic idea of the invention can be seen in bending the sheet-metal strip at least twice and compressing the resulting middle section at its two ends in such a way that local thickening occurs in the region of the middle section. According to the invention profile cross-sectional areas with increased wall thickness are therefore not obtained by the fact that adjacent areas are thinned, but they are obtained by targeted thickening. The double bending makes it possible to initiate the compression forces particularly easily and reliably in the middle section, since the faces of the opposite end portions of the central portion are freely accessible by the double bending. Since the bends can be introduced at any point in the cross section, according to the invention, the thickenings can be positioned largely freely in cross section.

Durch die Erfindung können an nahezu beliebiger Stelle im Blechband eine oder mehrere Aufdickungen erzeugt werden. Dabei ist es auch wirtschaftlich möglich, einen Querschnitt zu erzeugen, bei dem nur kleine Bereiche eine grosse Wandstärke und grosse Bereiche eine kleine Wandstärke aufweisen.By the invention, one or more thickenings can be generated at almost any point in the sheet metal strip. It is also economically possible to produce a cross section in which only small areas have a large wall thickness and large areas have a small wall thickness.

Vorzugsweise ist das erfindungsgemässe Verfahren ein Kaltwalzverfahren, das insbesondere auf einer Kaltwalzanlage durchgeführt werden kann. Nach der Erfindung weist zumindest eine der Walzenanordnungen zumindest eine Aussparung auf, in welche der Werkstoff beim Stauchvorgang in der zweiten Stufe fliesst und dabei zumindest eine lokale Aufdickung erzeugt.Preferably, the inventive method is a cold rolling process, which can be carried out in particular on a cold rolling mill. According to the invention, at least one of the roller assemblies has at least one recess, into which the material in Upsetting process flows in the second stage and thereby generates at least one local thickening.

Erfindungsgemäss erfolgt das Stauchen in der Ebene des Mittelabschnitts, das heisst die Stauchkräfte wirken zumindest annähernd parallel zu den Flachseiten des Mittelabschnitts. Das Biegen erfolgt erfindungsgemäss um Biegeachsen, die zumindest annähernd parallel zur Längsachse des Blechbandes verlaufen. Das zumindest zweifache Umbiegen kann simultan oder nacheinander erfolgen. Demgemäss kann die erste Stufe auch mehrere Einzelstufen umfassen. Jede Walzenanordnung kann eine Walze oder mehrere koaxial angeordnete Walzen aufweisen. Das Blechband kann insbesondere ein Metallblechband sein.According to the invention, the upsetting takes place in the plane of the middle section, that is to say the upsetting forces act at least approximately parallel to the flat sides of the middle section. According to the invention, the bending takes place about bending axes which run at least approximately parallel to the longitudinal axis of the sheet-metal strip. The at least two fold can be done simultaneously or sequentially. Accordingly, the first stage may also comprise several individual stages. Each roller assembly may comprise one roller or a plurality of coaxially arranged rollers. The sheet-metal strip may in particular be a sheet metal strip.

Das Umbiegen in der ersten Stufe kann vorzugsweise durch Walzprofilieren erfolgen. Grundsätzlich sind aber auch andere Umformtechniken möglich. Das Umbiegen in der ersten Stufe kann insbesondere ohne nennenswerte Beeinflussung der Wandstärke erfolgen, d.h. in der ersten Stufe ändert sich die Wandstärke maximal um 10% vorzugsweise maximal um 5% oder 1%, wobei bevorzugt in der ersten Stufe nur eine Verringerung der Wandstärke und keine Vergrösserung der Wandstärke vorgesehen ist.The bending in the first stage can preferably be done by roll forming. In principle, however, other forming techniques are possible. The bending in the first stage can be done in particular without significant influence on the wall thickness, i. in the first stage, the wall thickness changes by a maximum of 10%, preferably a maximum of 5% or 1%, wherein preferably in the first stage only a reduction of the wall thickness and no increase in the wall thickness is provided.

Grundsätzlich kann nach der Erfindung vorgesehen sein, dass die Biegungen beibehalten werden und auch im fertigen Profil noch vorhanden sind. Hierdurch kann die Profilherstellung weiter vereinfacht werden. Alternativ kann vorgesehen sein, zumindest eine der Biegungen nach dem Stauchen und Aufdicken wieder aufzuheben. In diesem Fall ist diese Biegung lediglich eine Hilfsstruktur zur Herstellung der Aufdickung, die im fertigen Profil aber nicht mehr vorhanden ist. Gemäss dieser Ausführungsform ist die Freiheit bei der Positionierung der Verdickung noch weiter erhöht.In principle, it can be provided according to the invention that the bends are retained and are still present in the finished profile. As a result, the profile production can be further simplified. Alternatively it can be provided to cancel at least one of the bends after upsetting and thickening again. In this case, this bend is merely an auxiliary structure for the production of the thickening, which is no longer present in the finished profile. According to this embodiment, the freedom in the positioning of the thickening is further increased.

Erfindungsgemäss weist die erste Walzenanordnung eine erste Drehachse und die zweite Walzenanordnung eine zweite Drehachse auf, wobei die Drehachsen zweckmässigerweise parallel verlaufen. Zwischen den beiden Walzenanordnungen ist ein Walzspalt gebildet, durch den das Blechband durchgeführt wird.According to the invention, the first roller arrangement has a first axis of rotation and the second roller arrangement has a second axis of rotation, wherein the axes of rotation are expediently parallel. Between the two roller assemblies, a nip is formed through which the metal strip is performed.

Beispielsweise für eine besonders effiziente Krafteinleitung ist es vorteilhaft, dass der Mittelabschnitt beim Stauchen, im Querschnitt des Blechbandes gesehen, zumindest annähernd senkrecht zur Drehachse der ersten Walzenanordnung und/oder der Drehachse der zweiten Walzenanordnung verläuft. Unter einem zumindest annähernd senkrechten Verlauf wird verstanden, dass der Winkel zwischen dem Mittelabschnitt, insbesondere zwischen den Flachseiten des Mittelabschnitts, und den Drehachsen 90° +/- 10°, insbesondere 90° +/- 5°, vorzugsweise 90° +/- 1 ° beträgt. Gemäss dieser Ausführungsform wird der Mittelabschnitt also zumindest annähernd senkrecht zu den Walzachsen durch den Walzspalt geführt, so dass die durch die Walzen aufgebrachten Stauchkräfte in der Ebene des Mittelabschnitts liegen. In der Regel ist es vorteilhaft, Hinterschneidungen im Bandquerschnitt zu vermeiden, so dass die oben genannten Winkel zweckmässigerweise kleiner 90° sein können.For example, for a particularly efficient introduction of force, it is advantageous that the center section during upsetting, seen in cross-section of the sheet metal strip, at least approximately perpendicular to the axis of rotation of the first roller assembly and / or the axis of rotation of the second roller assembly. An at least approximately vertical course is understood to mean that the angle between the middle section, in particular between the flat sides of the central section, and the axes of rotation is 90 ° +/- 10 °, in particular 90 ° +/- 5 °, preferably 90 ° +/- 1 °. According to this embodiment, the center section is thus guided through the roll gap at least approximately perpendicular to the rolling axes, so that the compression forces applied by the rolls lie in the plane of the center section. In general, it is advantageous to avoid undercuts in the strip cross-section, so that the above-mentioned angle may conveniently be less than 90 °.

Eine weitere bevorzugte Ausführungsform der Erfindung liegt darin, dass der erste Flankenabschnitt, im Querschnitt des Blechbandes gesehen, zumindest annähernd rechtwinklig vom Mittelabschnitt absteht, und/oder dass der zweite Flankenabschnitt, im Querschnitt des Blechbandes gesehen, zumindest annähernd rechtwinklig vom Mittelabschnitt absteht. Durch die rechtwinklige Anordnung sind einerseits die Endbereiche des Mittelabschnitts für die Walzenanordnungen besonders gut zugänglich, so dass der apparative Aufwand besonders gering ist. Andererseits können die Flankenabschnitte und/oder der Mittelabschnitt bei einer solchen Anordnung besonders einfach und zuverlässig während des Stauchens abgestützt werden, so dass unerwünschte Deformationen vermieden werden. Unter einem zumindest annähernd rechtwinkligen Abstehen wird verstanden, dass der jeweilige Flankenabschnitt und der Mittelabschnitt, insbesondere die Flachseiten des jeweiligen Flankenabschnitts und die Flachseiten des Mittelabschnitts, einen Winkel von 90° +/- 10°, insbesondere 90° +/- 5°, vorzugsweise 90° +/- 1 ° einschliessen. In der Regel ist es vorteilhaft, Hinterschneidungen im Bandquerschnitt zu vermeiden, so dass die genannten Winkel zweckmässigerweise kleiner 90° sein können.A further preferred embodiment of the invention lies in the fact that the first flank section, viewed in cross-section of the sheet-metal strip, protrudes at least approximately at right angles from the middle section, and / or that the second flank section, seen in cross-section of the sheet-metal strip, protrudes at least approximately at right angles from the central section. Due to the rectangular arrangement, on the one hand, the end regions of the middle section for the roller arrangements are particularly easily accessible, so that the outlay on equipment is particularly low. On the other hand, in such an arrangement, the flank sections and / or the middle section can be supported particularly simply and reliably during swaging so that undesirable deformations are avoided. An at least approximately perpendicular projection is understood to mean that the respective flank section and the middle section, in particular the flat sides of the respective flank section and the flat sides of the central section, form an angle of 90 ° +/- 10 °, in particular 90 ° +/- 5 °, preferably Include 90 ° +/- 1 °. In general, it is advantageous to avoid undercuts in the band cross-section, so that the mentioned angle can be conveniently less than 90 °.

Eine andere Ausführungsvariante der Erfindung liegt darin, dass die beiden Flankenabschnitte an gegenüberliegenden Flachseiten des Mittelabschnitts vom Mittelabschnitt vorstehen. Demgemäss bilden die drei Abschnitte im Querschnitt des Blechbandes zumindest annähernd eine Z-Form, wobei die beiden Aussenschenkel der Z-Form durch die Flankenabschnitte und der Mittelschenkel der Z-Form durch den Mittelabschnitt gebildet werden. Gemäss dieser Ausführungsvariante können die beiden Walzenanordnungen den Mittelabschnitt während des Stauchens auf beiden Seiten abstützen, so dass die Fertigungspräzision und Fertigungszuverlässigkeit weiter gesteigert werden können.Another embodiment of the invention lies in the fact that the two flank sections protrude on opposite flat sides of the middle section from the middle section. Accordingly, the three sections in the cross-section of the sheet metal strip at least approximately form a Z-shape, wherein the two outer legs of the Z-shape are formed by the flank portions and the center leg of the Z-shape through the central portion. According to this embodiment, the two roller assemblies can support the central portion during upsetting on both sides, so that manufacturing precision and manufacturing reliability can be further enhanced.

Überdies ist es zweckmässig, dass das Blechband in der zweiten Stufe an zumindest einem der Endbereiche des Mittelabschnitts, insbesondere in beiden Endbereichen, lokal aufgedickt wird. Diese Ausführungsform berücksichtigt, dass die Endbereiche des Mittelabschnitts, also die Übergangsbereiche zwischen dem Mittelabschnitt und den abgewinkelten Flanschbereichen, in einem Profil häufig besonders belastet sind. Die Ausführungsform sieht vor, diese besonders belasteten Bereiche durch gezieltes lokales Aufdicken zu stärken.Moreover, it is expedient that the sheet-metal strip in the second stage is locally thickened on at least one of the end regions of the middle section, in particular in both end regions. This embodiment takes into account that the end regions of the middle section, ie the transition regions between the middle section and the angled flange sections, in a profile are often particularly burdened. The embodiment provides for strengthening of these particularly stressed areas by targeted local thickening.

Das erfindungsgemässe Verfahren kann auch mit anderen die Blechstärke beeinflussenden Verfahren wie z.B. Bandprofilwalzen oder Bandkantenaufstauchen kombiniert werden. Durch die Kombination von erfindungsgemäss erzeugten lokalen Aufdickungen mit lokalen Ausdünnungen, die in der zweiten Stufe oder in einer zusätzlichen Verfahrensstufe am selben Blechband erzeugt werden, kann ein sehr grosser Wandstärkenbereich wirtschaftlich nutzbar gemacht werden, wodurch der Materialeinsatz z.B. bei der Fertigung von Profilschienen optimiert werden kann.The method according to the invention can also be used with other methods affecting sheet thickness, such as e.g. Strip profile rolls or strip edge upsetting are combined. By combining local thickenings with local thinning produced according to the invention, which are produced in the second stage or in an additional process stage on the same sheet-metal strip, a very large wall thickness range can be made economically usable, whereby the material input can be used, for example. can be optimized in the production of profile rails.

Besonders bevorzugt ist es, dass in der zweiten Stufe zumindest einer der beiden Flankenabschnitte, insbesondere beide Flankenabschnitte, von den Walzenanordnungen ausgedünnt wird. Gemäss dieser Ausführungsform werden in der zweiten Stufe mit denselben komplementären Walzenanordnungen zugleich Aufdickungen und Ausdünnungen erzeugt, so dass im Profil bei besonders geringem Aufwand besonders grosse Wandstärkenvariationen erzeugt werden können.It is particularly preferred that at least one of the two flank sections, in particular both flank sections, is thinned out of the roller arrangements in the second step. According to this embodiment, at the same time thickenings and thinning are produced in the second stage with the same complementary roller arrangements, so that particularly large wall thickness variations can be produced in the profile with particularly little effort.

Um grössere Bereiche des Blechbandes aufzudicken, kann es vorteilhaft sein, dass in einer an die zweite Stufe anschliessenden dritten Stufe der Mittelabschnitt mittels zweier weiterer komplementärer Walzenanordnungen, die an den beiden gegenüberliegenden Endbereichen des Mittelabschnitts angreifen, weiter gestaucht wird und dabei die lokale Aufdickung vergrössert wird. Es können auch noch weitere solcher Stauchstufen vorgesehen werden, so dass der Mittelabschnitt mehrfach in der Höhe reduziert und die Aufdickung ebenfalls mehrfach vergrössert wird.In order to thicken larger areas of the sheet-metal strip, it may be advantageous for the middle section to be further compressed by means of two further complementary roller arrangements which act on the two opposite end areas of the middle section in a third step adjoining the second step, thereby enlarging the local thickening , It is also possible to provide further such upsetting steps, so that the middle section is reduced in height several times and the thickening is likewise increased several times.

Ein Breiten des Profils während des Stauchens in der zweiten Stufe kann beispielsweise durch seitliche Stützrollen oder/und durch einen Absatz in den Walzenanordnungen vermieden werden. Eventuell ist das Verfahren aber auch ohne Einsatz solcher Hilfswerkzeuge bzw. Hilfsgeometrien durchführbar.A width of the profile during the upsetting in the second stage can be avoided for example by lateral support rollers and / or by a shoulder in the roller assemblies. Possibly, however, the method can also be carried out without the use of such auxiliary tools or auxiliary geometries.

Eine weitere vorteilhafte Fortbildung der Erfindung besteht darin, dass das Blechband in der ersten Stufe zumindest vierfach umgebogen wird, so dass, im Querschnitt des Blechbandes gesehen, ein weiterer Mittelabschnitt gebildet wird, an dessen gegenüberliegenden Endbereichen jeweils ein Flankenabschnitt winklig absteht, und dass in der an die erste Stufe anschliessenden zweiten Stufe die beiden Mittelabschnitte mittels der beiden komplementären Walzenanordnungen gestaucht werden. Demgemäss werden durch die beiden Walzenanordnungen zugleich zwei Mittelabschnitte gestaucht und dabei das Blechband an zumindest zwei Stellen im Querschnitt des Blechbandes lokal aufgedickt, so dass die Wirtschaftlichkeit des Verfahrens noch weiter gesteigert werden kann.A further advantageous development of the invention is that the sheet-metal strip is bent at least four times in the first stage, so that, seen in cross-section of the sheet metal strip, a further central portion is formed at the opposite end portions each a flank portion protrudes angularly, and that in the at the first stage subsequent second stage, the two central portions are compressed by means of the two complementary roller assemblies. Accordingly, by the two roller assemblies simultaneously compressed two middle sections while the sheet metal strip locally thickened at least two points in cross-section of the sheet metal strip, so that the cost of the process can be further increased.

Besonders zweckmässig ist es, dass die beiden Mittelabschnitte im Querschnitt des Blechbandes gesehen zumindest annähernd parallel verlaufen. Hierdurch kann die Stauchkraft besonders effektiv in beide Mittelabschnitte zugleich eingeleitet werden. Unter einem zumindest annähernd parallelen Verlauf wird verstanden, dass die beiden Mittelabschnitte, insbesondere ihre Flachseiten, einen Winkel von kleiner 10°, insbesondere kleiner 5° oder 1° einschliessen.It is particularly expedient that the two middle sections, viewed in the cross section of the sheet-metal strip, run at least approximately parallel. As a result, the compression force can be introduced particularly effectively in both middle sections at the same time. An at least approximately parallel course is understood to mean that the two middle sections, in particular their flat sides, enclose an angle of less than 10 °, in particular less than 5 ° or 1 °.

Weiter vorteilhaft ist es, dass ein gemeinsamer Flankenabschnitt vorgesehen ist, der von beiden Mittelabschnitten winklig absteht. Demgemäss kann das Blechband nach der ersten Stufe im Querschnitt des Blechbandes bereichsweise eine U-Form aufweisen, wobei die Seitenschenkel der U-Form durch die beiden Mittelabschnitte und der Mittelschenkel der U-Form durch den gemeinsamen Flankenabschnitt gebildet wird.It is also advantageous that a common flank section is provided, which protrudes at an angle from both middle sections. Accordingly, after the first stage, the sheet metal strip can have a U-shape in regions in the cross-section of the sheet-metal strip, the side legs of the U-shape being formed by the two middle sections and the center leg of the U-shape being formed by the common flank section.

Nach der Erfindung wird in der ersten Stufe eine Profilform erzeugt, welche zumindest einen zumindest annähernd senkrechten Abschnitt, den Mittelabschnitt, beinhaltet. Nachfolgend wird diese Profilform durch komplementäre Walzenanordnungen geführt, die einen Walzspalt bilden, der niedriger ist als der senkrechte Mittelabschnitt, was zu einer Stauchung des Mittelabschnitts führt.According to the invention, a profile shape is generated in the first stage, which includes at least one at least approximately vertical portion, the central portion. Subsequently, this profile shape is guided by complementary roller arrangements, which form a roll gap which is lower than the vertical central portion, which leads to a compression of the central portion.

Die Erfindung wird nachfolgend anhand bevorzugter Ausführungsbeispiele näher erläutert, die schematisch in den beiliegenden Figuren dargestellt sind. In den Figuren zeigen schematisch:

Figuren 1 bis 4:
Querschnittsansichten eines Blechbandes in aufeinanderfolgenden Prozessstadien eines erfindungsgemässen Verfahrens gemäss einer ersten Ausführungsform; und
Figur 5
eine Querschnittsansicht eines Blechbandes im Prozessstadium entsprechend Figur 3 eines erfindungsgemässen Verfahrens gemäss einer zweiten Ausführungsform.
The invention will be explained in more detail below with reference to preferred embodiments, which are shown schematically in the accompanying figures. In the figures show schematically:
FIGS. 1 to 4:
Cross-sectional views of a metal strip in successive stages of a process according to the invention according to a first embodiment; and
FIG. 5
a cross-sectional view of a metal strip in the process stage accordingly FIG. 3 a method according to the invention according to a second embodiment.

Gleich wirkende Elemente sind in den Figuren mit denselben Bezugszeichen gekennzeichnet.Like-acting elements are identified in the figures with the same reference numerals.

Die Figuren 1 bis 4 zeigen Querschnittsansichten eines Blechbandes in aufeinanderfolgenden Prozessstadien eines ersten Ausführungsbeispiels eines erfindungsgemässen Verfahrens.The FIGS. 1 to 4 show cross-sectional views of a metal strip in successive process stages of a first embodiment of a method according to the invention.

Ausgangsmaterial des Verfahrens ist ein ungebogenes, ebenes Blechband 1 wie in Figur 1 dargestellt.Starting material of the process is an unbent, flat sheet metal strip 1 as in FIG. 1 shown.

In einer ersten Stufe des Verfahrens wird das Blechband 1, vorzugsweise durch Walzprofilieren, zweifach umgebogen, wobei das Umbiegen um Biegeachsen erfolgt, die sich in Längsrichtung des Blechbandes, also senkrecht zur Zeichenebene der Figuren 1 bis 4 erstrecken. Durch das Umbiegen wird die in Figur 2 gezeigte stufenförmige Struktur mit einem Mittelabschnitt 10 und zwei winklig, insbesondere rechtwinklig, hierzu angeordneten Flankenabschnitten 13 und 14 erhalten, wobei die Flankenabschnitte 13 und 14 an gegenüberliegenden Endbereichen 23 beziehungsweise 24 vom Mittelabschnitt 10 abstehen. Die beiden Flankenabschnitte 13 und 14 weisen dabei in entgegengesetzte Richtungen, d.h. sie stehen jeweils von gegenüberliegenden Flachseiten 17 beziehungsweise 18 vom Mittelabschnitt 10 vor. Es wird also eine im Querschnitt zweifach rechtwinklig abgewinkelte Struktur erhalten, bei welcher der Mittelabschnitt 10 senkrecht zu den beiden Flankenabschnitten 13 und 14 verlaufend zwischen den beiden Flankenabschnitten 13, 14 angeordnet ist.In a first stage of the process, the sheet metal strip 1, preferably by roll profiling, bent twice, wherein the bending takes place about bending axes, in the longitudinal direction of the sheet metal strip, ie perpendicular to the plane of the FIGS. 1 to 4 extend. By bending, the in FIG. 2 shown stepped structure having a central portion 10 and two angularly, in particular at right angles, for this purpose arranged flank sections 13 and 14 obtained, the flank sections 13 and 14 protrude at opposite end portions 23 and 24 from the central portion 10. The two flank sections 13 and 14 in this case point in opposite directions, ie they project from opposite flat sides 17 and 18, respectively, from the middle section 10. Thus, a structure which is angled at right angles to the cross section in two sections is obtained, in which the central section 10 is arranged perpendicular to the two flank sections 13 and 14, extending between the two flank sections 13, 14.

Sodann wird das entsprechend Figur 2 deformierte Blechband 1 wie in Figur 3 gezeigt durch einen Walzspalt geführt, der zwischen zwei korrespondierenden Walzenanordnungen 43 und 44 ausgebildet ist, wobei die Walzenanordnungen 43 und 44 jeweils um eine Drehachse 53 beziehungsweise 54 drehbar sind. Das Blechband 1 wird so zwischen den beiden Walzenanordnungen 43 und 44 hindurchgeführt, dass, im Querschnitt des Blechbandes 1 gesehen, die beiden Flankenabschnitte 13 und 14 parallel zu den beiden Drehachsen 53 und 54 und der Mittelabschnitt 10 senkrecht zu den beiden Drehachsen 53 und 54 verlaufen. Beim Durchführen des Blechbandes 1 wirken, wie durch die Pfeile S angedeutet, parallel zu der Ebene und den Flachseiten 17, 18 des Mittelabschnitts 10 gerichtete Stauchkräfte auf die Endbereiche 23, 24 des Mittelabschnitts 10, welche den Mittelabschnitt 10 in seinen Endbereichen 23, 24 aufstauchen und aufdicken. Beim Stauchen verdrängtes Material kann in Aussparungen 63 und 64 fliessen, welche an den beiden Walzenanordnungen 43 beziehungsweise 44 im Bereich der Endbereiche 23 beziehungsweise 24 gebildet sind, und dabei Aufdickungen bilden. Ergebnis ist das in Figur 4 gezeigte Blechband 1, bei dem das Blech an den Endbereichen 23, 24 des Mittelabschnitts aufgedickt ist. Um einen besonders zuverlässigen Materialfluss zu gewährleisten ist die Länge der Aussparungen 63 und 64, senkrecht zu den beiden Drehachsen 53 und 54 betrachtet, kleiner als die Knicklänge des Mittelabschnitts 10.Then this is done accordingly FIG. 2 deformed sheet metal strip 1 as in FIG. 3 shown guided by a nip formed between two corresponding roller assemblies 43 and 44, wherein the roller assemblies 43 and 44 are each rotatable about a rotation axis 53 and 54, respectively. The sheet-metal strip 1 is passed between the two roller assemblies 43 and 44 that, seen in cross-section of the sheet-metal strip 1, the two flank portions 13 and 14 parallel to the two axes of rotation 53 and 54 and the central portion 10 perpendicular to the two axes of rotation 53 and 54 extend , When passing through the metal strip 1 act, as indicated by the arrows S, parallel to the plane and the flat sides 17, 18 of the central portion 10 directed compression forces on the end portions 23, 24 of the central portion 10, which elevate the central portion 10 in its end regions 23, 24 and thicken. Compression-displaced material can flow into recesses 63 and 64, which are formed on the two roller assemblies 43 and 44 in the region of the end regions 23 and 24, respectively, thereby forming thickenings. Result is that in FIG. 4 Sheet metal strip 1 shown, in which the sheet is thickened at the end portions 23, 24 of the central portion. To be a particularly reliable To ensure material flow is the length of the recesses 63 and 64, viewed perpendicular to the two axes of rotation 53 and 54, smaller than the buckling length of the central portion 10th

Wie Figur 3 weiter zeigt, weist die erste Walzenanordnung 43 einen durchmesserkleineren Bereich 91 und einen durchmessergrösseren Bereich 92 auf. Ebenso weist die zweite Walzenanordnung 44 einen durchmesserkleineren Bereich 96 und einen durchmessergrösseren Bereich 95 auf, wobei der durchmesserkleinere Bereich 91 der ersten Walzenanordnung 43 dem durchmessergrössere Bereich 95 der zweiten Walzenanordnung 44 gegenüberliegt und der durchmessergrössere Bereich 92 der ersten Walzenanordnung 43 dem durchmesserkleineren Bereich 96 der zweiten Walzenanordnung 44 gegenüberliegt. Zwischen den Bereichen 91 und 95 wird der erste Flankenabschnitt 13 hindurchgeführt und dabei vorzugsweise ausgedünnt. Zwischen den Bereichen 92 und 96 wird der zweite Flankenabschnitt 14 hindurchgeführt und dabei ebenfalls vorzugsweise ausgedünnt. Der Mittelabschnitt 10 wird in der zweiten Stufe beim Stauchen von den beiden durchmessergrösseren Bereichen 95 und 92, die an den Flachseiten 17 beziehungsweise 18 anliegen, quer zur Richtung der Stauchkräfte S gestützt, so dass eine unerwünschte Deformation des Mittelabschnitts 10 verhindert ist.As FIG. 3 shows further, the first roller assembly 43 has a smaller diameter portion 91 and a larger diameter portion 92. Likewise, the second roller assembly 44 has a smaller diameter portion 96 and a larger diameter portion 95, wherein the smaller diameter portion 91 of the first roller assembly 43 opposite the larger diameter portion 95 of the second roller assembly 44 and the larger diameter portion 92 of the first roller assembly 43 to the smaller diameter portion 96 of the second Roller assembly 44 is opposite. Between the regions 91 and 95, the first flank portion 13 is passed and preferably thinned out. Between the regions 92 and 96, the second flank portion 14 is passed and thereby also preferably thinned out. The middle section 10 is supported in the second stage when compressing the two larger diameter portions 95 and 92 which abut the flat sides 17 and 18, transversely to the direction of the compression forces S, so that an undesirable deformation of the central portion 10 is prevented.

Der zweite Schritt, d.h. der Stauchschritt, gemäss einer alternativen Ausführungsform der Erfindung ist in Figur 5 dargestellt. Gemäss Figur 5 wird das Blechband im ersten Schritt vierfach umgebogen, so dass zwei parallel verlaufende Mittelabschnitte 10 und 11 erhalten werden, die durch einen gemeinsamen Flankenabschnitt 14 verbunden sind. Vom ersten Mittelabschnitt 10 steht überdies ein weiterer Flankenabschnitt 13 ab und vom zweiten Mittelabschnitt 11 ein weiterer Flankenabschnitt 15. Der gemeinsame Flankenabschnitt 14 bildet dabei mit den beiden Mittelabschnitten 10 und 11 im Querschnitt eine U-Form. Insgesamt weist das Blechband im Querschnitt eine Hutform auf. Bei dem in Figur 5 dargestellten Stauchschritt werden die Mittelabschnitte 10 und 11 durch die beiden Walzenanordnungen 43, 44 simultan aufgestaucht und aufgedickt.The second step, ie the compression step, according to an alternative embodiment of the invention is in FIG. 5 shown. According to FIG. 5 the sheet-metal strip is bent four times in the first step, so that two parallel central portions 10 and 11 are obtained, which are connected by a common edge portion 14. Moreover, from the first middle section 10 there is another flank section 13 and from the second middle section 11 a further flank section 15. The common flank section 14 forms a U-shape with the two central sections 10 and 11 in cross-section. Overall, the metal strip has a hat shape in cross section. At the in FIG. 5 The upsetting step shown, the central portions 10 and 11 are simultaneously upset and thickened by the two roller assemblies 43, 44.

Beim Ausführungsbeispiel der Figur 5 sind die beiden Walzenanordnungen 43, 44 jeweils spiegelsymmetrisch ausgebildet. Die erste Walzenanordnung 43 weist einen durchmesserkleineren Bereich 71, daneben einen mittigen durchmessergrösseren Bereich 72 und daneben einen weiteren durchmesserkleineren Bereich 73 auf. Die korrespondierende zweite Walzenanordnung 44 weist einen durchmessergrösseen Bereich 74, daneben einen durchmesserkleineren Bereich 75 und daneben einen weiteren durchmessergrösseren Bereich 76 auf. Dabei liegen jeweils die Bereiche 71 und 74, 72 und 75 sowie 73 und 76 gegenüber. Beim Stauchen stützen die Bereiche 74 und 72 den ersten Mittelabschnitt 10 an seinen Flachseiten ab und die Bereich 72 und 76 stützen den zweiten Mittelabschnitt 11 an seinen Flachseiten ab.In the embodiment of FIG. 5 the two roller assemblies 43, 44 are each formed mirror-symmetrically. The first roller assembly 43 has a smaller-diameter portion 71, next to a central diameter larger area 72 and next to a further smaller diameter portion 73. The corresponding second roller arrangement 44 has a diameter-sized region 74, next to it a smaller-diameter region 75 and next to it a further diameter-larger region 76. In each case, the areas 71 and 74, 72 and 75 and 73 and 76 are opposite. When upsetting the areas 74 and 72 support the first central portion 10 at its flat sides and the areas 72 and 76 support the second central portion 11 at its flat sides.

Wie das Ausführungsbeispiel der Figur 5 weiter zeigt, kann zumindest einer der äusseren Flankenabschnitte 13 bzw. 15 seitlich mittels Stützrollen 103 bzw. 105 abgestützt werden. Diese Stützrollen 103 bzw. 105 können insbesondere Teil der zweiten Walzenanordnung 44 sein. Eine oder mehrere seitliche Stützrollen, die an zumindest einem Endbereich des Blechbandes 10 wirken, können auch bei den anderen beschriebenen Ausführungsbeispielen vorgesehen sein.Like the embodiment of FIG. 5 further shows, at least one of the outer edge portions 13 and 15 can be supported laterally by means of support rollers 103 and 105, respectively. These support rollers 103 and 105 may in particular be part of the second roller arrangement 44. One or more lateral support rollers acting on at least one end portion of the sheet metal strip 10 may also be provided in the other described embodiments.

Claims (9)

  1. Method for producing a profile from a sheet metal strip (1), in which
    - in a first step the sheet metal strip (1) is folded at least twice, so that, viewed in the cross section of the sheet metal strip (1), a middle section (10) and two side sections (13, 14) are formed, which side sections (13, 14) project at an angle from two opposed end regions (23, 24) of the middle section (10),
    characterised in that
    - in a second step following the first step the middle section (10) is upset by means of two complementary roll arrangements (43, 44) engaging on the two opposed end regions (23, 24) of the middle section (10), the sheet metal strip (1) thereby being thickened locally.
  2. Method according to Claim 1,
    characterised in that
    the first roll arrangement (43) has a first axis of rotation (53) and the second roll arrangement (44) has a second axis of rotation (54), and in that
    during the upsetting the middle section (10), viewed in the cross section of the sheet metal strip (1), is disposed at least approximately perpendicularly to the axis of rotation (53) of the first roll arrangement (43) and/or to the axis of rotation (54) of the second roll arrangement (44), so that the angle between the middle section and the axes of rotation is 90° ± 10°.
  3. Method according to either of the preceding claims,
    characterised in that
    the first side section (13), viewed in the cross section of the sheet metal strip (1), projects at least approximately at a right angle from the middle section (10), and in that
    the second side section (14), viewed in the cross section of the sheet metal strip (1), projects at least approximately at a right angle from the middle section (10), so that the respective side section and the middle section include an angle of 90° ± 10°.
  4. Method according to any one of the preceding claims,
    characterised in that
    the two side sections (13, 14) project from the middle section (10) on opposite flat sides (17, 18) of the middle section (10).
  5. Method according to any one of the preceding claims,
    characterised in that
    in the second step the sheet metal strip (1) is thickened locally in at least one of the end regions (23, 24) of the middle section (10).
  6. Method according to any one of the preceding claims,
    characterised in that
    in the second step at least one of the two side sections (13, 14) is thinned by the roll arrangements (43, 44).
  7. Method according to any one of the preceding claims,
    characterised in that
    - in the first step the sheet metal strip (1) is folded at least four times, so that, viewed in the cross section of the sheet metal strip (1), a further middle section (11) is formed, from each of the opposed end regions of which further middle section (11) a respective side section (14, 15) projects at an angle, and in that
    - in the second step following the first step the two middle sections (10, 11) are upset by means of the two complementary roll arrangements (43, 44).
  8. Method according to Claim 7,
    characterised in that
    the two middle sections (10, 11) are disposed approximately parallel to one another, viewed in the cross section of the sheet metal strip (1), so that the two middle sections include an angle of less than 10°.
  9. Method according to Claim 7 or 8,
    characterised in that
    in the first step a common side section (14) projecting at an angle from both middle sections (10, 11) is formed.
EP12171604.7A 2011-07-13 2012-06-12 Method for producing a profile from sheet metal Not-in-force EP2548666B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011079095A DE102011079095A1 (en) 2011-07-13 2011-07-13 Method for producing a profile from a sheet metal strip

Publications (2)

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EP2548666A1 EP2548666A1 (en) 2013-01-23
EP2548666B1 true EP2548666B1 (en) 2014-02-26

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ID=46318951

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EP12171604.7A Not-in-force EP2548666B1 (en) 2011-07-13 2012-06-12 Method for producing a profile from sheet metal

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US (1) US9199289B2 (en)
EP (1) EP2548666B1 (en)
CN (1) CN102873181B (en)
BR (1) BR102012016611A2 (en)
CA (1) CA2782445A1 (en)
DE (1) DE102011079095A1 (en)
DK (1) DK2548666T3 (en)
IN (1) IN2012CH02736A (en)
RU (1) RU2610375C2 (en)
UA (1) UA110929C2 (en)

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Also Published As

Publication number Publication date
BR102012016611A2 (en) 2013-10-01
EP2548666A1 (en) 2013-01-23
DK2548666T3 (en) 2014-04-14
US20130180303A1 (en) 2013-07-18
CA2782445A1 (en) 2013-01-13
RU2610375C2 (en) 2017-02-09
IN2012CH02736A (en) 2015-07-31
UA110929C2 (en) 2016-03-10
CN102873181A (en) 2013-01-16
US9199289B2 (en) 2015-12-01
RU2012129479A (en) 2014-01-20
DE102011079095A1 (en) 2013-01-17
CN102873181B (en) 2016-12-07

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