EP0635318B1 - Extrusion method - Google Patents

Extrusion method Download PDF

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Publication number
EP0635318B1
EP0635318B1 EP19940810389 EP94810389A EP0635318B1 EP 0635318 B1 EP0635318 B1 EP 0635318B1 EP 19940810389 EP19940810389 EP 19940810389 EP 94810389 A EP94810389 A EP 94810389A EP 0635318 B1 EP0635318 B1 EP 0635318B1
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EP
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Prior art keywords
process according
extrusion
hollow profiles
hollow
profile
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EP19940810389
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German (de)
French (fr)
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EP0635318A1 (en
Inventor
Lucien Bonvin
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3A Composites International AG
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Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages

Definitions

  • the present invention relates to a method for producing hollow profiles Extrusion of an aluminum alloy containing more than 10 wt .-% Si.
  • hollow profiles or tubes can have one or more hollow chambers.
  • suitable materials are limited. For example, aluminum in a purity from 99 to 99.9% by weight and alloys of the types AlMgSi 0.5, AlMg1, AlCuMg1 are e.g. especially suitable for processing in extrusion processes.
  • the object of the present invention is to provide a method for producing hollow profiles Type mentioned at the beginning with low porosity made of high silicon aluminum alloys to provide, which makes it possible to create such hollow profiles in a simple, fast and inexpensive to manufacture in one operation.
  • a press bolt from a Aluminum alloy which is one of the types AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19 or AlFeMgCuSi15-19 belongs to a temperature of 300 to 500 ° C brought and by extrusion at a pressure of 30.3975 to 354.6375 bar to hollow profiles, containing at least one cylindrical tread in the form of a shaped tube, is processed, the profile speed is 0.5 to 12 m / min.
  • hollow profiles can, for example, shaped tubes, such as simple shaped tubes or shaped tubes with outside profiling.
  • hollow profiles with at least two are preferred Chambers in the form of at least two coaxially connected, connected molded tubes or also of three or more connected, linked together Molded pipes.
  • These hollow profiles can also have an outer profile.
  • the hollow profile can, for example, at least two and suitably two to eight, preferably two to six and in particular four cylindrical treads in the shape of lined up, connected shaped pipes included.
  • Typical wall thicknesses of the shaped tubes can be, for example, 5 mm to 15 mm, expediently 7 to 13 mm and preferably 8 to 12 mm.
  • the material thickness can be from 5 to 30 mm, expediently from 7 to 26 mm and preferably 8 to 24 mm.
  • the diameter of the hollow chambers can be, for example, 4 to 12 cm, suitably 6 to 10 cm and preferably 6 to 8 cm.
  • the cross-sectional area of the material ie the aluminum alloy, is at least 15 cm 2 per shaped tube or. cylindrical tread.
  • the cross-sectional area of the material ie the aluminum alloy, can be, for example, 30 cm 2 to 240 cm 2 .
  • the four chambers are, respectively. have four cylindrical treads.
  • the cross-sectional area of the material of the hollow profile can be, for example, 75 to 120 cm 2 .
  • the cross-section of the cylindrical running surfaces is preferably round or approximately round, i.e. slightly oval.
  • An aluminum alloy is used as the material or material for pressing into hollow profiles containing more than 10% by weight of Si, aluminum alloys containing 12 expedient up to 22% by weight silicon and aluminum alloys containing 16 to 18% by weight Silicon are preferred.
  • aluminum alloys containing high silicon and in particular eutectic are preferred and hypereutectic silicon alloys.
  • Aluminum alloys in which the silicon particle size is smaller are also preferred are larger than 200 ⁇ m and in particular 5 to 80 ⁇ m.
  • Aluminum alloys are preferred which only contain traces of copper, or copper accompanying impurity, or contain a copper content of 0.001 to 1.5 wt .-%.
  • the method according to the invention is carried out in such a way that the alloy is produced and is usually poured into the form of an ingot and optionally annealed.
  • the cast ingot can then be split into press studs, and the press studs can if required to be turned off.
  • the extrusion process can be direct extrusion, indirect extrusion or a related extrusion process can be used, the direct extrusion with a chamber or bridge tool is preferred.
  • the extrusion process can be carried out with a profile speed of e.g. 0.5 to 12 m / min, expediently from 1 to 7 m / min and preferably at 1.5 to 5 m / min.
  • the temperature of the press bolts during extrusion can be, for example, 300 to 500 ° C and conveniently at 380 to 480 ° C.
  • the pressures are 30.3975 to 354.6375 bar (30 to 350 kg / cm 2 ), with 81.06 to 283.71 bar (80 to 280 kg / cm 2 ) being preferred.
  • the hollow profiles can be quenched if necessary, solution annealed, stretched, sawn, straightened and aged cold or warm.
  • the method according to the invention can advantageously be used for extruding hollow profiles such as Cylinder liners can be used.
  • the hollow profiles can e.g. as cylinder liners with at least one cylinder surface, expediently two to eight, advantageously two to six and in particular four cylinder running surfaces in piston engines, such as internal combustion engines with internal or external ignition, piston compressors, Steam engines, piston pumps, etc. are used.
  • piston engines such as internal combustion engines with internal or external ignition, piston compressors, Steam engines, piston pumps, etc. are used.
  • the hollow profiles can be subjected to further machining processes.
  • the cylinder surfaces of cylinder liners can be replaced by mechanical ones and / or chemical processes are processed.
  • the cylinder liners turned, ground, lapped or honed, or the cylinder surfaces can be exposed to a chemical process in which the surface aluminum layer removed by a few ⁇ m and the silicon crystals in the surface area partially exposed.
  • the hollow profiles can then be used, for example, as so-called wet cylinder liners in internal combustion engines be used.
  • the hollow profiles are preferred for the production of Cylinder blocks used, the hollow profile an integrated part of the cylinder block represents.
  • the cylinder block is made by gravity casting or by die casting, with the hollow profile cast around and in the cast metal, usually along the outer Side walls are embedded in whole or in part. This creates a cylinder block as a casting, the hollow profile produced according to the invention being cast in the casting forms dry cylinder liners. That which forms the further part of the cylinder block Cast metal is, for example, of the same or similar composition as that corresponding hollow profile.
  • the method according to the invention has the advantage that on the hollow profiles visually, even with the help of optical devices, none Porosity is recognizable.

Description

Vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Hohlprofilen durch Strangpressen einer Aluminiumlegierung, enthaltend mehr als 10 Gew.-% Si.The present invention relates to a method for producing hollow profiles Extrusion of an aluminum alloy containing more than 10 wt .-% Si.

Es ist bekannt, Hohlprofile oder Rohre durch Strangpressen herzustellen. Solche Hohlprofile können eine oder mehrere Hohlkammern aufweisen. In der Auswahl der für das Strangpressen geeigneten Werkstoffe ist man jedoch begrenzt. Beispielsweise Aluminium in einer Reinheit von 99 bis 99,9 Gew.-% und Legierungen der Typen AlMgSi 0,5, AlMg1, AlCuMg1 sind dabei z.B. besonders für die Verarbeitung in Strangpressverfahren geeignet.It is known to produce hollow profiles or tubes by extrusion. Such hollow profiles can have one or more hollow chambers. In the selection of for extrusion suitable materials are limited. For example, aluminum in a purity from 99 to 99.9% by weight and alloys of the types AlMgSi 0.5, AlMg1, AlCuMg1 are e.g. especially suitable for processing in extrusion processes.

Die US 4,313,327 beschreibt die Herstellung von Hohlprofilen, enthaltend mehrere rohrförmige Durchflusskanäle, durch Strangpressen von Aluminiumlegierungen, wobei die Trennwand zwischen zwei benachbarten Durchflusskanälen jeweils die Kanäle verbindende Durchlassöffnungen aufweist. Solche Hohlprofile dienen im wesentlichen zur Leitung von Kühlmittel in Wärmetauschern.US 4,313,327 describes the production of hollow profiles containing several tubular ones Flow channels, through extrusion of aluminum alloys, the partition passage openings connecting the channels between two adjacent flow channels having. Such hollow profiles are used essentially to guide coolant in heat exchangers.

In der Praxis besteht das Bedürfnis, aus hochfesten und insbesondere hochsiliciumhaltigen Aluminiumlegierungen Formkörper der eingangs genannten Art zur Verfügung zu haben, wobei diese Formkörper auch grosse Querschnittsflächen bezüglich des Materials aufweisen. Solche Formkörper wurden bis anhin insbesondere durch Giessen hergestellt.In practice, there is a need for high-strength and in particular high-silicon ones To have available aluminum alloy shaped bodies of the type mentioned at the outset, these moldings also have large cross-sectional areas with respect to the material. Until now, such moldings have been produced in particular by casting.

Aufgabe vorliegender Erfindung ist es, ein Verfahren zur Herstellung von Hohlprofilen der eingangs genannten Art mit niedriger Porosität aus hochsiliciumhaltigen Aluminiumlegierungen zur Verfügung zu stellen, das es ermöglicht, solche Hohlprofile auf einfache, schnelle und kostengünstige Weise in einem Arbeitsgang herzustellen.The object of the present invention is to provide a method for producing hollow profiles Type mentioned at the beginning with low porosity made of high silicon aluminum alloys to provide, which makes it possible to create such hollow profiles in a simple, fast and inexpensive to manufacture in one operation.

Erfindungsgemäss wird dies dadurch erreicht, dass ein Pressbolzen aus einer Aluminiumlegierung, welche zu einem der Typen AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19 oder AlFeMgCuSi15-19 gehört, auf eine Temperatur von 300 bis 500 °C gebracht und durch Strangpressen bei einem Pressdruck von 30,3975 bis 354,6375 bar zu Hohlprofilen, enthaltend wenigstens eine zylindrische Lauffläche in Formrohrgestalt, verarbeitet wird, wobei die Profilgeschwindigkeit 0.5 bis 12 m/min beträgt.According to the invention, this is achieved in that a press bolt from a Aluminum alloy, which is one of the types AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19 or AlFeMgCuSi15-19 belongs to a temperature of 300 to 500 ° C brought and by extrusion at a pressure of 30.3975 to 354.6375 bar to hollow profiles, containing at least one cylindrical tread in the form of a shaped tube, is processed, the profile speed is 0.5 to 12 m / min.

Solche Hohlprofile können beispielsweise Formrohre, wie einfache Formrohre oder Formrohre mit Aussenprofilierung sein. Bevorzugt sind jedoch Hohlprofile mit wenigstens zwei Kammern in der Form von wenigstens zwei coaxial aneinandergereihten, verbundenen Formrohren oder auch von drei oder mehr gegeneinander versetzt aneinandergereihten, verbundenen Formrohren. Diese Hohlprofile können ebenfalls eine Aussenprofilierung aufweisen.Such hollow profiles can, for example, shaped tubes, such as simple shaped tubes or shaped tubes with outside profiling. However, hollow profiles with at least two are preferred Chambers in the form of at least two coaxially connected, connected molded tubes or also of three or more connected, linked together Molded pipes. These hollow profiles can also have an outer profile.

Demnach kann das Hohlprofil beispielsweise wenigstens zwei und zweckmässig zwei bis acht, bevorzugt zwei bis sechs und insbesondere vier zylindrische Laufflächen in Gestalt von aneinandergereihten, verbundenen Formrohren enthalten.Accordingly, the hollow profile can, for example, at least two and suitably two to eight, preferably two to six and in particular four cylindrical treads in the shape of lined up, connected shaped pipes included.

Typische Wandstärken der Formrohre können beispielsweise 5 mm bis 15 mm, zweckmässig 7 bis 13 mm und bevorzugt 8 bis 12 mm sein. An den Zwischenstegen zwischen den Formrohrteilen kann die Materialstärke von 5 bis 30 mm, zweckmässig 7 bis 26 mm und bevorzugt 8 bis 24 mm betragen. Die Durchmesser der Hohlkammern können beispielsweise 4 bis 12 cm, zweckmässig 6 bis 10 cm und vorzugsweise 6 bis 8 cm betragen.Typical wall thicknesses of the shaped tubes can be, for example, 5 mm to 15 mm, expediently 7 to 13 mm and preferably 8 to 12 mm. On the intermediate webs between the molded tube parts the material thickness can be from 5 to 30 mm, expediently from 7 to 26 mm and preferably 8 to 24 mm. The diameter of the hollow chambers can be, for example, 4 to 12 cm, suitably 6 to 10 cm and preferably 6 to 8 cm.

Bei Hohlprofilen, die nach dem Verfahren gemäss vorliegender Erfindung hergestellt werden können, beträgt die Querschnittsfläche des Materials, d.h. der Aluminiumlegierung, wenigstens 15 cm2 pro Formrohr, resp. zylindrische Lauffläche.In the case of hollow profiles which can be produced by the method according to the present invention, the cross-sectional area of the material, ie the aluminum alloy, is at least 15 cm 2 per shaped tube or. cylindrical tread.

Weist das erfindungsgemäss hergestellte Hohlprofil beispielsweise zwei bis sechs zylindrische Laufflächen in Gestalt von verbundenen Formrohren auf, welche als Strangpresskörper ein Mehrkammerhohlprofil bilden, so kann die Querschnittsfläche des Materials, d.h. der Aluminiumlegierung, beispielsweise 30 cm2 bis 240 cm2 betragen.If the hollow profile produced according to the invention has, for example, two to six cylindrical running surfaces in the form of connected molded tubes which form a multi-chamber hollow profile as an extruded body, the cross-sectional area of the material, ie the aluminum alloy, can be, for example, 30 cm 2 to 240 cm 2 .

Besonders bevorzugt ist ein Verfahren zur Herstellung von Hohlprofilen und insbesondere Mehrkammerhohlprofilen, die vier Kammern, resp. vier zylindrische Laufflächen, aufweisen. Die Querschnittfläche des Materials des Hohlprofils kann beispielsweise 75 bis 120 cm2 betragen.Particularly preferred is a method for producing hollow profiles and in particular multi-chamber hollow profiles, the four chambers, respectively. have four cylindrical treads. The cross-sectional area of the material of the hollow profile can be, for example, 75 to 120 cm 2 .

Die zylindrischen Laufflächen sind in ihrem Querschnitt bevorzugt rund oder annähernd rund, d.h. leicht oval.The cross-section of the cylindrical running surfaces is preferably round or approximately round, i.e. slightly oval.

Als Material oder Werkstoff zur Verpressung zu Hohlprofilen wird eine Aluminiumlegierung enthaltend mehr als 10 Gew.-% Si angewendet, wobei Aluminiumlegierungen enthaltend 12 bis 22 Gew.-% Silicium zweckmässig und Aluminiumlegierungen enthaltend 16 bis 18 Gew.-% Silicium bevorzugt sind.An aluminum alloy is used as the material or material for pressing into hollow profiles containing more than 10% by weight of Si, aluminum alloys containing 12 expedient up to 22% by weight silicon and aluminum alloys containing 16 to 18% by weight Silicon are preferred.

Bevorzugt sind demnach hochsiliciumhaltige Aluminiumlegierungen und insbesondere eutektische und übereutektische Siliciumlegierungen. Accordingly, aluminum alloys containing high silicon and in particular eutectic are preferred and hypereutectic silicon alloys.

Zu den bevorzugten Aluminiumlegierungen können beispielhaft folgende Typen genannt werden:
AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19, AlFeMgCuSi15-19.The following types of preferred aluminum alloys can be mentioned by way of example:
AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19, AlFeMgCuSi15-19.

Ebenfalls bevorzugt sind Aluminiumlegierungen, in denen die Siliciumpartikelgrösse Kleiner als 200 µm und insbesondere 5 bis 80 µm gross sind.Aluminum alloys in which the silicon particle size is smaller are also preferred are larger than 200 µm and in particular 5 to 80 µm.

Bevorzugt werden Aluminiumlegierungen, die nur Spuren von Kupfer, oder Kupfer nur als begleitende Verunreinigung, oder einen Kupferanteil von 0,001 bis 1,5 Gew.-% enthalten.Aluminum alloys are preferred which only contain traces of copper, or copper accompanying impurity, or contain a copper content of 0.001 to 1.5 wt .-%.

Das erfindungsgemässe Verfahren wird derart ausgeführt, dass die Legierung hergestellt und in der Regel in die Form eines Barrens gegossen und gegebenenfalls geglüht wird.The method according to the invention is carried out in such a way that the alloy is produced and is usually poured into the form of an ingot and optionally annealed.

Der Gussbarren kann dann in Pressbolzen aufgeteilt werden, und die Pressbolzen können falls erforderlich abgedreht werden.The cast ingot can then be split into press studs, and the press studs can if required to be turned off.

Als Strangpressverfahren kann das direkte Strangpressen, das indirekte Strangpressen oder ein verwandtes Strangpressverfahren angewendet werden, wobei das direkte Strangpressen mit einem Kammer- oder Brückenwerkzeug bevorzugt ist.The extrusion process can be direct extrusion, indirect extrusion or a related extrusion process can be used, the direct extrusion with a chamber or bridge tool is preferred.

Das Strangpressverfahren kann mit einer Profilgeschwindigkeit von z.B. 0,5 bis 12 m/min, zweckmässig von 1 bis 7 m/min und vorzugsweise mit 1,5 bis 5 m/min durchgeführt werden.The extrusion process can be carried out with a profile speed of e.g. 0.5 to 12 m / min, expediently from 1 to 7 m / min and preferably at 1.5 to 5 m / min.

Die Temperatur der Pressbolzen während des Strangpressens kann beispielsweise bei 300 bis 500°C und zweckmässig bei 380 bis 480°C liegen.The temperature of the press bolts during extrusion can be, for example, 300 to 500 ° C and conveniently at 380 to 480 ° C.

Die Pressdrücke liegen bei 30,3975 bis 354,6375 bar (30 bis 350 kg/cm2), wobei 81,06 bis 283,71 bar (80 bis 280 kg/cm2) bevorzugt sind.The pressures are 30.3975 to 354.6375 bar (30 to 350 kg / cm 2 ), with 81.06 to 283.71 bar (80 to 280 kg / cm 2 ) being preferred.

Nach dem Strangpressverfahren können die Hohlprofile, falls erforderlich, abgeschreckt, lösungsglühungsbehandelt, gereckt, gesägt, gerichtet und kalt bzw. warm ausgelagert werden.After the extrusion process, the hollow profiles can be quenched if necessary, solution annealed, stretched, sawn, straightened and aged cold or warm.

Das erfindungsgemässe Verfahren kann vorteilhaft zum Strangpressen von Hohlprofilen wie Zylinderlaufbuchsen angewendet werden. The method according to the invention can advantageously be used for extruding hollow profiles such as Cylinder liners can be used.

Die Hohlprofile können z.B. als Zylinderlaufbuchsen mit wenigstens einer Zylinderlauffläche, zweckmässig zwei bis acht, vorteilhaft zwei bis sechs und insbesondere vier Zylinderlaufflächen in Kolbenmaschinen, wie Verbrennungsmotoren mit Eigen- oder Fremdzündung, Kolbenkompressoren, Dampfmaschinen, Kolbenpumpen usw. eingesetzt werden.The hollow profiles can e.g. as cylinder liners with at least one cylinder surface, expediently two to eight, advantageously two to six and in particular four cylinder running surfaces in piston engines, such as internal combustion engines with internal or external ignition, piston compressors, Steam engines, piston pumps, etc. are used.

Falls erforderlich können die Hohlprofile weiteren Bearbeitungsverfahren ausgesetzt werden. Beispielsweise können die Zylinderflächen von Zylinderlaufbuchsen durch mechanische und/oder chemische Verfahren bearbeitet werden. Beispielsweise können die Zylinderlaufbuchsen ausgedreht, geschliffen, geläppt oder gehont werden, oder die Zylinderlaufflächen können einem chemischen Prozess ausgesetzt werden, in dem die oberflächliche Aluminiumschicht um einige µm entfernt und die im Oberflächenbereich befindlichen Siliciumkristalle teilweise freigelegt werden.If necessary, the hollow profiles can be subjected to further machining processes. For example, the cylinder surfaces of cylinder liners can be replaced by mechanical ones and / or chemical processes are processed. For example, the cylinder liners turned, ground, lapped or honed, or the cylinder surfaces can be exposed to a chemical process in which the surface aluminum layer removed by a few µm and the silicon crystals in the surface area partially exposed.

Die Hohlprofile können dann beispielsweise als sogenannte nasse Zylinderbuchsen in Verbrennungsmotoren eingesetzt werden. Bevorzugt werden die Hohlprofile zur Herstellung von Zylinderblöcken eingesetzt, wobei das Hohlprofil einen integrierten Teil des Zylinderblockes darstellt. Der Zylinderblock wird durch Giessen mit Schwerkraft oder durch Druckguss hergestellt, wobei das Hohlprofil umgossen und im Gussmetall, in der Regel entlang den äusseren Seitenwänden ganz oder teilweise, eingebettet wird. Es entsteht dabei ein Zylinderblock als Gusstück, wobei das erfindungsgemäss hergestellte Hohlprofil die im Gusstück eingegossenen trockenen Zylinderlaufbuchsen bildet. Das den weiteren Teil des Zylinderblockes bildende Gussmetall ist beispielsweise von gleicher oder ähnlicher Zusammensetzung wie das entsprechende Hohlprofil. The hollow profiles can then be used, for example, as so-called wet cylinder liners in internal combustion engines be used. The hollow profiles are preferred for the production of Cylinder blocks used, the hollow profile an integrated part of the cylinder block represents. The cylinder block is made by gravity casting or by die casting, with the hollow profile cast around and in the cast metal, usually along the outer Side walls are embedded in whole or in part. This creates a cylinder block as a casting, the hollow profile produced according to the invention being cast in the casting forms dry cylinder liners. That which forms the further part of the cylinder block Cast metal is, for example, of the same or similar composition as that corresponding hollow profile.

Anhand der Figuren 1 bis 3 werden verschiedene Ausführungsformen von erfindungsgemäss hergestellten Strangpressprofilen in der Draufsicht beschrieben.

  • Figur 1 zeigt die Draufsicht auf einen Formkörper, welcher als Zylinderlaufbuchsenteil z.B. in die Gussform für einen Zylinderblock eingesetzt werden kann. Dargestellt sind die Wände des Mehrkammerhohlprofils. Die einzelnen Kammern, resp. Zylinderlaufbuchsen, sind durch Stege, die während dem Strangpressen angelegt werden, verbunden.
  • Figur 2 zeigt die Draufsicht auf einen Formkörper gemäss Figur 1, wobei die Formrohre eine Aussenprofilierung aufweisen.
  • Figur 3 zeigt die Draufsicht auf einen Formkörper, wobei die einzelnen Kammern, resp. Zylinderlaufbuchsen, nicht in gerader Linie aneinander gereiht, sondern gegeneinander versetzt auf zwei Querachsen liegend angeordnet sind.
    • Various embodiments of extruded profiles produced according to the invention are described in plan view with reference to FIGS. 1 to 3.
  • FIG. 1 shows the top view of a shaped body which can be used as a cylinder liner part, for example in the casting mold for a cylinder block. The walls of the multi-chamber hollow profile are shown. The individual chambers, resp. Cylinder liners are connected by webs that are created during extrusion.
  • FIG. 2 shows the top view of a shaped body according to FIG. 1, the shaped tubes having an outer profile.
  • Figure 3 shows a plan view of a molded body, the individual chambers, respectively. Cylinder liners, not lined up in a straight line, but offset against each other on two transverse axes.

    • Das erfindungsgemässe Verfahren hat den Vorteil, dass an den Hohlprofilen visuell, auch bei einer Zuhilfenahme von optischen Geräten, keine Porosität erkennbar ist.The method according to the invention has the advantage that on the hollow profiles visually, even with the help of optical devices, none Porosity is recognizable.

    Claims (10)

    1. Process for the production of hollow profiles by the extrusion of an aluminium alloy containing more than 10 % by weight Si, characterised in that an extrusion billet consisting of an aluminium alloy belonging to one of the types AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19 or AlFeMgCuSi15-19 is brought to a temperature of 300 to 500°C and is worked by extrusion at a pressure of 30.3975 to 354.6375 bar into hollow profiles containing at least one cylindrical working surface in the form of a section tube, the profile speed being 0.5 to 12 m/min.
    2. Process according to claim 1, characterised in that the aluminium alloy contains 12 to 22 % by weight silicon and, in particular, 16 to 18 % by weight silicon.
    3. Process according to claim 1, characterised in that the aluminium alloy contains silicon particles having dimensions of less than 200 µm.
    4. Process according to claim 1, characterised in that the temperature of the extrusion billet is 380 to 480°C.
    5. Process according to claim 1, characterised in that the pressure is 81.06 to 283.71 bar.
    6. Process according to claim 1, characterised in that the profile speed is 1 to 7 m/min and, in particular, 1.5 to 5 m/min.
    7. Process according to claim 1, characterised in that the hollow profiles are produced by direct extrusion.
    8. Process according to claim 1, characterised in that the hollow profile contains at least two chambers in the form of section tubes arranged in a row and connected together.
    9. Process according to claim 1, characterised in that the cross-sectional surface area per cylindrical working surface is at least 15 cm2.
    10. Process according to claim 1, characterised in that the hollow profile has two to six cylindrical working surfaces in its cross-sectional surface area, and the cross-sectional surface area of the material of the hollow profile is 30 cm2 to 240 cm2.
    EP19940810389 1993-07-22 1994-06-30 Extrusion method Revoked EP0635318B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    CH2213/93 1993-07-22
    CH221393 1993-07-22
    CH225193 1993-07-26
    CH2251/93 1993-07-26

    Publications (2)

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    EP0635318A1 EP0635318A1 (en) 1995-01-25
    EP0635318B1 true EP0635318B1 (en) 1999-04-21

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    EP19940810389 Revoked EP0635318B1 (en) 1993-07-22 1994-06-30 Extrusion method

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    DE (1) DE59408129D1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19532253C2 (en) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Process for the production of thin-walled pipes (II)
    DE19532244C2 (en) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Process for the production of thin-walled tubes (I)
    DE19532252C2 (en) * 1995-09-01 1999-12-02 Erbsloeh Ag Method of manufacturing bushings

    Family Cites Families (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3404967A (en) * 1965-06-24 1968-10-08 Anaconda American Brass Co Two-hole extrusion
    FR2344358A2 (en) * 1976-03-19 1977-10-14 Pechiney Aluminium NEW BLANKETS FOR IMPACT SPINNING
    US4313327A (en) * 1979-12-31 1982-02-02 Peerless Of America, Inc. Extrusion die for forming multi-passage tubular members
    JPS61190051A (en) * 1985-02-20 1986-08-23 Sumitomo Light Metal Ind Ltd Manufacture of al type hollow section having low coefficient of linear expansion
    JPS6283453A (en) * 1985-10-07 1987-04-16 Sumitomo Alum Smelt Co Ltd Manufacture of aluminum alloy ingot for extrusion
    JPH0323011A (en) * 1989-06-20 1991-01-31 Kobe Steel Ltd Manufacture of hollow extruded stock of al-si type alloy
    JPH03126802A (en) * 1989-10-09 1991-05-30 Kobe Steel Ltd Manufacture of hollow extruded material

    Also Published As

    Publication number Publication date
    DE59408129D1 (en) 1999-05-27
    EP0635318A1 (en) 1995-01-25

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