EP1085949A1 - Method for producing metal shapes with a polygonal cross-section by means of continuous casting on a double-flanged wheel and continuous rolling - Google Patents

Method for producing metal shapes with a polygonal cross-section by means of continuous casting on a double-flanged wheel and continuous rolling

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Publication number
EP1085949A1
EP1085949A1 EP99925059A EP99925059A EP1085949A1 EP 1085949 A1 EP1085949 A1 EP 1085949A1 EP 99925059 A EP99925059 A EP 99925059A EP 99925059 A EP99925059 A EP 99925059A EP 1085949 A1 EP1085949 A1 EP 1085949A1
Authority
EP
European Patent Office
Prior art keywords
section
rollers
profile
aluminum alloy
alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99925059A
Other languages
German (de)
French (fr)
Other versions
EP1085949B1 (en
Inventor
Christian Gourdet
Gérard Thomas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP1085949A1 publication Critical patent/EP1085949A1/en
Application granted granted Critical
Publication of EP1085949B1 publication Critical patent/EP1085949B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • 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
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0028—Drawing the rolled product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for manufacturing metal profiles, in particular aluminum alloys, continuously rolled by a series of pairs of rollers from a blank obtained by continuous casting in a grooved wheel, optionally followed by one or more stages of drawing or drawing and annealing.
  • Wire rod has been manufactured for many years from non-ferrous alloys, in particular aluminum alloys, from a blank cast continuously in the groove of a wheel which is rotated, the groove being closed by a ribbon driven by the wheel.
  • 2-wheel casting systems with a small support wheel are known, 3-wheel systems, such as the Properzi casting described in patent GB 1143264, 4-wheel systems like the 4R casting by Pechiney described in FR 1178580, and 5-wheel systems such as that described in US 3416596.
  • the blank of generally triangular or trapezoidal section, is then rolled continuously through a series of successive cages formed of two rollers, and alternately horizontal and vertical, to obtain a wire of circular section, which can be used as it is or transformed by wire drawing.
  • the invention aims to remedy this drawback and allow precise control of the geometry of the section of the rolled product, when this section has a polygonal part, that is to say at least two intersecting straight parts.
  • the laminated profile can then be used directly as it is, or drawn or drawn to obtain a wire of non-circular section, with a smaller number of passes than from a circular section.
  • the subject of the invention is a method of manufacturing metal profiles of partially or totally polygonal section by continuous casting in a grooved wheel and continuous rolling using a series of at least 3 and preferably from 3 to 8 pairs of rollers provided with a peripheral groove, these rollers being arranged symmetrically with respect to the profile, and alternately horizontal and vertical, a process which is characterized in that.
  • the grooves of the first pairs of rollers are identical to those of the rollers used for the manufacture of profiles of circular section,
  • the last pair of rollers has grooves defining a section corresponding substantially to that of the desired profile
  • the section formed by the grooves of the last pair of rollers has radii of curvature between 1 and 5 mm at the vertices of the polygon, - the sides of the polygon not parallel to the air gap of the last pair of rollers have, with respect to at the corresponding sides of the section of the final profile a draft between Vi and 3 °
  • a subject of the invention is also a method of manufacturing drawn or drawn metal profiles of partially or totally polygonal section from blanks of partially or totally polygonal section obtained by continuous casting in a grooved wheel and continuous rolling, in which the number of drawing or drawing passes and the number of anneals are each reduced by at least a third compared to the process of the prior art starting from a roughly substantially circular section
  • FIG. 1 represents a continuous casting machine on a grooved wheel and the continuous rolling train of the blank.
  • Figures 2 to 5 show, in section through the plane of their axes of rotation, the last pair of rollers used for the rolling of the profiles described in Examples 1 to 4
  • the manufacturing method according to the invention uses a casting machine comprising a liquid metal feed nozzle (1), a casting wheel (2), which is rotated, provided with a peripheral groove, closed by a metallic ribbon (3) driven by the wheel.
  • the machine can be a two-wheel machine and a caster like that shown in FIG. 1, the second wheel (4) serving for tensioning the ribbon, and the caster (5) being intended to hold the ribbon on the casting wheel. in the vicinity of the casting area.
  • the machine can also be a machine with three, four or five wheels.
  • the section of the blank (6) generally trapezoidal, varies according to the installations between 900 and more than 3000 mm 2 .
  • the number of rolling stands (7), each comprising a pair of rollers, is greater than two and preferably between 3 and 8. This number depends on the final section to be obtained, since the starting section is linked to the casting and therefore cannot be changed easily.
  • the reduction in section at each cage is, in general, between 10 and 40%.
  • the precision of the geometry improves with the number of cages, but conversely a high number of cages tends to harden the metal, which makes subsequent drawing more difficult.
  • the first cages use rollers with the same grooves as those used for rolling the wire with circular section.
  • the penultimate cage may comprise, as the case may be, rollers identical to the first, either flat rollers, or rollers similar in shape to the rollers of the last cage, which in all cases have grooves delimiting a corresponding section to the desired final section.
  • this section is too close to the final section, it is not possible to meet acceptable dimensional tolerances.
  • experience has shown that if the radii of curvature between the planar faces are too small, the metal tends to stick to the rollers, which causes incidents on the line and forces stops.
  • these drawbacks are avoided by adapting the shape of the groove of the finishing rollers, which ensures easy removal and good filling of the shapes of the grooves.
  • This adaptation is obtained by providing radii of curvature between the flat faces of between 1 and 5 mm, and, for the faces not parallel to the air gap of the rollers, undercuts, that is to say angles between the groove and the corresponding face of the profile, between X A and 3 °. Special precautions must be taken when winding the profile at the end of rolling. Contrary to the winding of the wire with circular section, it is necessary to envisage a small space between the turns and to avoid that they overlap.
  • the continuous casting process according to the invention makes it possible to produce metal profiles, in particular of aluminum or copper alloys, of square, rectangular, triangular, and more generally partially or totally polygonal section, with good dimensional tolerances, from the 'order of 0, 1 mm, and with good detachment of the metal from the last rolling stand.
  • These profiles can be used as such in many mechanical or electrical applications, or for the manufacture of welding wire. They can also be transformed by drawing or drawing in one or more passes, in order to give them dimensions, tolerances on dimensions and shape, or particular mechanical characteristics. Some of these products, obtained from wire rod with circular section, are known.
  • the fact of using as a draft for drawing or drawing a machine wire of partially or totally polygonal section according to the invention considerably simplifies the manufacturing process since the shape of the cross section of the blank can be very close to that of the desired drawn product. Furthermore, lubricant leaks between the metal and the die are obtained, which are obtained when the geometries of the blank and of the die are too different.
  • the process for manufacturing drawn or drawn wire of partially or totally polygonal section according to the invention is characterized in that one chooses, for a given section of the final profile, a rough section such that the number of passes of drawing or drawing and annealing can be minimized.
  • a rate of work hardening E (inlet section - outlet section) / outlet section close to the maximum value (of the order of 80% for aluminum alloys) that can be supported by the wire without developing unacceptable defects
  • the person skilled in the art can define, for an aluminum or copper alloy wire, a manufacturing range such that the number of drawing or drawing passes and the number of anneals are each reduced by at least one third. This gain is greater for the sections which, at least locally, deviate the most from a circular section (V or T sections, very elongated flats and in particular those having a section such as the ratio of the width to the thickness is greater than 2).
  • the exact number of drawing or drawing passes depends on the type of alloy used, as well as on the parameters of the drawing or drawing process. For alloys aluminum and square or triangular section profiles, it is most often possible to limit the drawing or drawing to a single pass with annealing, instead of at least two passes and two anneals starting from a circular blank . For profiles of rectangular section with a width to thickness ratio between 1 and 2, it is possible to limit the drawing or the drawing to two passes and an annealing, and for the width to thickness ratios between 2 and 5, to three passes and two annealed.
  • the profiles of rectangular section with a width to thickness ratio greater than 4 are moreover very difficult to produce by drawing from a blank of round section, so that the method according to the invention allows a widening of the possibilities of manufacturing the wire drawing.
  • the process according to the invention can be used for a wide variety of metal alloys, in particular aluminum alloys, including heat treatment alloys (series 2000, 6000 and 7000), and copper alloys.
  • the metal was cast on a continuous casting machine of the 3-wheel type, in a grooved wheel leading to a trapezoidal blank, wider 41 mm and 29 mm high, i.e. a rough section of 1050 mm 2 .
  • the first 4 pairs of rollers have grooves defining a circular section, as is the case for the continuous rolling of profiles of circular shape.
  • the fifth pair of rollers delimits a flat air gap and the sixth delimits a square section very close to that of the finished product.
  • the air gap between the rollers cettee this sixth pair is 2 mm.
  • the radii of curvature of the section of the grooves of the rollers at the 4 vertices of the square are 3 mm.
  • the remains on the sides of the square perpendicular to the air gap of the rollers are 1 °.
  • the first 5 pairs of rollers have standard grooves similar to those used for rolling profiles of circular section.
  • the sixth pair has an air gap of 1.5 mm and its grooves define a rectangle whose apices have a radius of curvature of 2 mm and the sides perpendicular to the air gap a draft of 1 °. No bonding of the profile is observed at the outlet of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
  • An aluminum alloy 1370 profile is produced having a section in the general shape of a circular sector, delimited by a triangle at the bottom and an arc of a circle at the top, forming part of a rectangle 16.2 x 12.2 mm, and 150 mm section 2 .
  • the types of rollers, formats and speeds at the exit of each cage are shown in Table 3.
  • the first 4 pairs of rollers have standard grooves similar to those of the rollers used for the continuous rolling of profiles of circular section.
  • the grooves of the fifth pair define a sector-shaped section
  • the sixth pair has grooves delimiting a circular sector-shaped section, with a radius of curvature of 3 mm between the 2 flat parts, a draft of 1 ° on these parts planes and an air gap between the two 1.5 mm rollers.
  • the upper part of the section, in the shape of an arc of a circle, is carefully polished. No bonding of the profile is observed at the outlet of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
  • a profile is produced, intended for electrical applications, of aluminum alloy 1370 of the form shown in FIG. 4 of section 490 mm 2 .
  • the types of rollers, formats and speeds at the exit of each cage are indicated in Table 4: Table 4
  • a flat wire of section 15.0 x 4.0 mm in aluminum alloy 2017 is produced from a flat section of rectangular section 16.5 x 8, 1 mm described in example 2, by drawing in one three wire drawing passes, separated by annealing-lubrication in intermediate formats 16.0 x 6.3 mm and 15.65 x 4.45 mm.
  • the usual range according to the prior art started from a blank of circular section with a diameter of 18 mm, and included 6 drawing passes separated each time by an annealing and lubrication in intermediate formats: 17.3 x 13.8 mm, 16, 6 x 10.7 mm, 16.2 x 8.2 mm, 16.0 x 16.3 mm, 15.65 x 4.85 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
  • Continuous Casting (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a method for producing metal shapes with a partially or totally polygonal cross-section by means of continuous casting in a double-flanged wheel and continuous rolling using a series of at least 3 pairs of rollers with a peripheral flange, whereby said rollers are alternately horizontally and vertically disposed in a symmetrical position with respect to said shape. The inventive method is characterised in that the flanges of the first pairs of rollers are identical to those used to produce shapes with a circular cross-section; the last pair of rollers has flanges defining a section that corresponds substantially to that of the desired shape; the section formed by the grooves of the last pair of rollers has curve radiuses of between 1 and 5 mm at the highest points of the polygon; the sides of the polygon that are not parallel to the air gap pertaining to the last pair of rollers have a clearance angle of ½-3° in comparison with the corresponding of the section of the final shape. The invention can be used to produce copper or aluminum alloy shapes for drawing or and/or subsequent redrawing.

Description

Procédé de fabrication de profilés métalliques de section polygonale par coulée continue sur roue à gorge et laminage continu Method for manufacturing metal profiles of polygonal section by continuous casting on a grooved wheel and continuous rolling
Domaine de l'inventionField of the invention
L'invention concerne un procédé de fabrication de profilés métalliques, en particulier en alliages d'aluminium, laminés en continu par une série de paires de galets à partir d'une ébauche obtenue par coulée continue dans une roue à gorge, éventuellement suivi d'une ou plusieurs étapes d'étirage ou de tréfilage et de recuit.The invention relates to a method for manufacturing metal profiles, in particular aluminum alloys, continuously rolled by a series of pairs of rollers from a blank obtained by continuous casting in a grooved wheel, optionally followed by one or more stages of drawing or drawing and annealing.
Etat de la techniqueState of the art
On fabrique depuis de nombreuses années du fil machine en alliages non-ferreux, notamment en alliages d'aluminium, à partir d'une ébauche coulée en continu dans la gorge d'une roue que l'on fait tourner, la gorge étant obturée par un ruban entraîné par la roue. On connaît des systèmes de coulée à 2 roues avec une petite roue d'appui, des systèmes à 3 roues, comme la coulée Properzi décrite dans le brevet GB 1143264, des systèmes à 4 roues comme la coulée 4R de Pechiney décrite dans FR 1178580, et des systèmes à 5 roues comme celui décrit dans US 3416596. L'ébauche, de section généralement triangulaire ou trapézoïdale, est ensuite laminée en continu à travers une série de cages successives formées de deux galets, et alternativement horizontales et verticales, pour obtenir un fil de section circulaire, qui peut être utilisé tel quel ou transformé par tréfilage.Wire rod has been manufactured for many years from non-ferrous alloys, in particular aluminum alloys, from a blank cast continuously in the groove of a wheel which is rotated, the groove being closed by a ribbon driven by the wheel. 2-wheel casting systems with a small support wheel are known, 3-wheel systems, such as the Properzi casting described in patent GB 1143264, 4-wheel systems like the 4R casting by Pechiney described in FR 1178580, and 5-wheel systems such as that described in US 3416596. The blank, of generally triangular or trapezoidal section, is then rolled continuously through a series of successive cages formed of two rollers, and alternately horizontal and vertical, to obtain a wire of circular section, which can be used as it is or transformed by wire drawing.
Dans le cas des alliages d'aluminium, le procédé est largement utilisé pour des alliages peu chargés, destinés notamment à des conducteurs électriques. Moyennant certaines adaptations, décrites par exemple dans les brevets FR 2234936 (Secim et Aluminium Pechiney), FR 2304414 (Secim) et FR 2359613 (Aluminium Pechiney), il a été possible de couler et laminer en évitant de provoquer des porosités des alliages plus chargés à intervalle de solidification plus élevé, tels que les alliages des séries 2000, 5000 et 7000 selon les désignations de l' Aluminum Association, utilisables pour des applications mécaniques.In the case of aluminum alloys, the process is widely used for lightly loaded alloys, intended in particular for electrical conductors. With certain adaptations, described for example in patents FR 2234936 (Secim and Aluminum Pechiney), FR 2304414 (Secim) and FR 2359613 (Aluminum Pechiney), it was possible to sink and laminate while avoiding causing porosities of the more charged alloys at higher solidification intervals, such as alloys of the 2000 series, 5000 and 7000 according to the designations of the Aluminum Association, usable for mechanical applications.
A la connaissance de la demanderesse, aucune des machines de coulée-laminage continus existantes n'a jamais fabriqué de produits à section non circulaire. Certes, il est normal d'utiliser du fil machine rond lorsque le produit final tréfilé est lui-même un fil rond, ce qui est le cas par exemple pour les conducteurs électriques ou le fil pour grillage. Il existe par contre, notamment dans les applications mécaniques, des produits tréfilés de section non circulaire, par exemple rectangulaire, triangulaire, polygonale ou en forme de té, pour lesquels il serait plus économique de partir d'un fil machine de forme voisine, ce qui limiterait les passes de tréfilage, voire de sortir de la machine de coulée-laminage aux cotes finales sans tréfilage ultérieur. L'une des raisons pouvant expliquer l'absence sur le marché de fil machine à section non circulaire tient à la difficulté de contrôler la géométrie du profil au laminage. Pour une section circulaire en effet, le produit sortant de la dernière cage de laminage ne repose sur la gorge des galets que par une génératrice, et son décollement en sortie ne pose pas de problème. Il n'en va pas de même pour des produits dont la section comporte une partie plane, par exemple une section rectangulaire, triangulaire ou en forme de té. Ils reposent sur la gorge des galets de la dernière cage par une bande plus ou moins large, dont le décollement irrégulier entraîne des distorsions dans la géométrie du produit laminé, ainsi que des défauts de surface.To the knowledge of the applicant, none of the existing continuous casting-rolling machines has ever manufactured products with a non-circular section. Of course, it is normal to use round machine wire when the final drawn product is itself a round wire, which is the case for example for electrical conductors or wire for wire mesh. On the other hand, there are, in particular in mechanical applications, drawn products of non-circular section, for example rectangular, triangular, polygonal or in the shape of a tee, for which it would be more economical to start from a machine wire of neighboring shape, this which would limit the drawing passes, or even leave the casting-rolling machine to the final dimensions without subsequent drawing. One of the reasons that could explain the absence on the market of wire rod with a non-circular section is due to the difficulty of controlling the geometry of the profile during rolling. For a circular section, in fact, the product leaving the last rolling stand rests on the groove of the rollers only by a generator, and its separation at the outlet poses no problem. The same is not true for products whose section has a flat part, for example a rectangular, triangular or tee-shaped section. They rest on the groove of the rollers of the last cage by a more or less wide strip, the irregular detachment of which causes distortions in the geometry of the rolled product, as well as surface defects.
Objet de l'inventionSubject of the invention
L'invention a pour but de remédier à cet inconvénient et de permettre un contrôle précis de la géométrie de la section du produit laminé, lorsque cette section comporte une partie polygonale, c'est-à-dire au moins deux parties droites sécantes. Le profilé laminé peut alors être utilisé directement en l'état, ou tréfilé ou étiré pour obtenir un fil de section non circulaire, avec un nombre de passes plus réduit qu'à partir d'une section circulaire. L'invention a pour objet un procédé de fabrication de profilés métalliques de section partiellement ou totalement polygonale par coulée continue dans une roue à gorge et laminage en continu à l'aide d'une série d'au moins 3 et préférentiellement de 3 à 8 paires de galets munis d'une gorge périphérique, ces galets étant disposés symétriquement par rapport au profilé, et alternativement horizontaux et verticaux, procédé qui se caractérise en ce que.The invention aims to remedy this drawback and allow precise control of the geometry of the section of the rolled product, when this section has a polygonal part, that is to say at least two intersecting straight parts. The laminated profile can then be used directly as it is, or drawn or drawn to obtain a wire of non-circular section, with a smaller number of passes than from a circular section. The subject of the invention is a method of manufacturing metal profiles of partially or totally polygonal section by continuous casting in a grooved wheel and continuous rolling using a series of at least 3 and preferably from 3 to 8 pairs of rollers provided with a peripheral groove, these rollers being arranged symmetrically with respect to the profile, and alternately horizontal and vertical, a process which is characterized in that.
- les gorges des premières paires de galets sont identiques à celles des galets utilisés pour la fabrication de profilés de section circulaire,the grooves of the first pairs of rollers are identical to those of the rollers used for the manufacture of profiles of circular section,
- la dernière paire de galets comporte des gorges délimitant une section correspondant sensiblement à celle du profilé désiré,- the last pair of rollers has grooves defining a section corresponding substantially to that of the desired profile,
- la section formée par les gorges de la dernière paire de galets présente aux sommets du polygone des rayons de courbure compris entre 1 et 5 mm, - les côtés du polygone non parallèles à l'entrefer de la dernière paire de galets présentent, par rapport aux côtés correspondants de la section du profilé final une dépouille comprise entre Vi et 3°- the section formed by the grooves of the last pair of rollers has radii of curvature between 1 and 5 mm at the vertices of the polygon, - the sides of the polygon not parallel to the air gap of the last pair of rollers have, with respect to at the corresponding sides of the section of the final profile a draft between Vi and 3 °
L'invention a également pour objet un procédé de fabrication de profilés métalliques étirés ou tréfilés de section partiellement ou totalement polygonale à partir d'ébauches de section partiellement ou totalement polygonale obtenus par coulée continue dans une roue à gorge et laminage en continu, dans lequel le nombre de passes d'étirage ou de tréfilage et le nombre de recuits sont réduits chacun d'au moins un tiers par rapport au procédé de l'art antérieur partant d'une ébauche de section sensiblement circulaireA subject of the invention is also a method of manufacturing drawn or drawn metal profiles of partially or totally polygonal section from blanks of partially or totally polygonal section obtained by continuous casting in a grooved wheel and continuous rolling, in which the number of drawing or drawing passes and the number of anneals are each reduced by at least a third compared to the process of the prior art starting from a roughly substantially circular section
Description des figuresDescription of the figures
La figure 1 représente une machine de coulée continue sur roue à gorge et le train de laminage continu de l'ébauche.FIG. 1 represents a continuous casting machine on a grooved wheel and the continuous rolling train of the blank.
Les figures 2 à 5 représentent, en coupe par le plan de leurs axes de rotation, la dernière paire de galets utilisée pour le laminage des profilés décrits dans les exemples 1 à 4Figures 2 to 5 show, in section through the plane of their axes of rotation, the last pair of rollers used for the rolling of the profiles described in Examples 1 to 4
Description de l'inventionDescription of the invention
Le procédé de fabrication selon l'invention utilise une machine de coulée comportant une busette d'alimentation (1) en métal liquide, une roue de coulée (2), que l'on fait tourner, munie d'une gorge périphérique, obturée par un ruban métallique (3) entraîné par la roue. La machine peut être une machine à deux roues et une roulette comme celle représentée à la figure 1, la deuxième roue (4) servant à la tension du ruban, et la roulette (5) étant destinée à maintenir le ruban sur la roue de coulée au voisinage de la zone de coulée. La machine peut être également une machine à trois, quatre ou cinq roues. La section de l'ébauche (6), de forme généralement trapézoïdale, varie suivant les installations entre 900 et plus de 3000 mm2.The manufacturing method according to the invention uses a casting machine comprising a liquid metal feed nozzle (1), a casting wheel (2), which is rotated, provided with a peripheral groove, closed by a metallic ribbon (3) driven by the wheel. The machine can be a two-wheel machine and a caster like that shown in FIG. 1, the second wheel (4) serving for tensioning the ribbon, and the caster (5) being intended to hold the ribbon on the casting wheel. in the vicinity of the casting area. The machine can also be a machine with three, four or five wheels. The section of the blank (6), generally trapezoidal, varies according to the installations between 900 and more than 3000 mm 2 .
Le nombre de cages de laminage (7), comportant chacune une paire de galets, est supérieur à deux et préférentiellement compris entre 3 et 8. Ce nombre dépend de la section finale à obtenir, puisque la section de départ est liée à la machine de coulée et ne peut donc être modifiée facilement. La réduction de section à chaque cage est, en général, comprise entre 10 et 40%. La précision de la géométrie s'améliore avec le nombre de cages, mais inversement un nombre élevé de cages a tendance à écrouir le métal, ce qui rend plus difficile le tréfilage ultérieur. Les premières cages utilisent des galets avec les mêmes gorges que ceux utilisés pour le laminage du fil à section circulaire. L'avant-dernière cage peut comporter, selon les cas, des galets identiques aux premiers, soit des galets plats, soit des galets de forme voisine des galets de la dernière cage, qui eux ont dans tous les cas des gorges délimitant une section correspondant à la section finale désirée. Cependant, l'expérience a montré que si cette section est trop proche de la section finale, on n'arrive pas à respecter des tolérances dimensionnelles acceptables. De même, l'expérience a montré que si les rayons de courbure entre les faces planes sont trop petits, le métal à tendance à coller aux galets, ce qui provoque des incidents sur la ligne et oblige à des arrêts. Selon l'invention, ces inconvénients sont évités par une adaptation de la forme de la gorge des galets finisseurs, qui assure un retrait aisé et un bon remplissage des formes des gorges. Cette adaptation est obtenue en prévoyant des rayons de courbure entre les faces planes compris entre 1 et 5 mm, et, pour les faces non parallèles à l'entrefer des galets, des dépouilles, c'est-à-dire des angles entre la gorge et la face correspondante du profilé, compris entre XA et 3°. Des précautions particulières doivent être prises à l'enroulement du profilé en fin de laminage. Contrairement à l'enroulement du fil à section circulaire, il faut prévoir un petit espace entre les spires et éviter qu'elles ne se chevauchent. Le procédé de coulée continue selon l'invention permet de réaliser des profilés métalliques, notamment en alliages d'aluminium ou de cuivre, de section carrée, rectangulaire, triangulaire, et plus généralement partiellement ou totalement polygonale, avec de bonnes tolérances dimensionnelles, de l'ordre de 0, 1 mm, et avec un bon décollement du métal de la dernière cage de laminage.The number of rolling stands (7), each comprising a pair of rollers, is greater than two and preferably between 3 and 8. This number depends on the final section to be obtained, since the starting section is linked to the casting and therefore cannot be changed easily. The reduction in section at each cage is, in general, between 10 and 40%. The precision of the geometry improves with the number of cages, but conversely a high number of cages tends to harden the metal, which makes subsequent drawing more difficult. The first cages use rollers with the same grooves as those used for rolling the wire with circular section. The penultimate cage may comprise, as the case may be, rollers identical to the first, either flat rollers, or rollers similar in shape to the rollers of the last cage, which in all cases have grooves delimiting a corresponding section to the desired final section. However, experience has shown that if this section is too close to the final section, it is not possible to meet acceptable dimensional tolerances. Likewise, experience has shown that if the radii of curvature between the planar faces are too small, the metal tends to stick to the rollers, which causes incidents on the line and forces stops. According to the invention, these drawbacks are avoided by adapting the shape of the groove of the finishing rollers, which ensures easy removal and good filling of the shapes of the grooves. This adaptation is obtained by providing radii of curvature between the flat faces of between 1 and 5 mm, and, for the faces not parallel to the air gap of the rollers, undercuts, that is to say angles between the groove and the corresponding face of the profile, between X A and 3 °. Special precautions must be taken when winding the profile at the end of rolling. Contrary to the winding of the wire with circular section, it is necessary to envisage a small space between the turns and to avoid that they overlap. The continuous casting process according to the invention makes it possible to produce metal profiles, in particular of aluminum or copper alloys, of square, rectangular, triangular, and more generally partially or totally polygonal section, with good dimensional tolerances, from the 'order of 0, 1 mm, and with good detachment of the metal from the last rolling stand.
Ces profilés peuvent être utilisés tels quels dans de nombreuses applications mécaniques ou électriques, ou pour la fabrication de fil de soudure. Ils peuvent aussi être transformés par étirage ou tréfilage en une ou plusieurs passes, afin de leur conférer des dimensions, tolérances sur dimensions et forme, ou des caractéristiques mécaniques particulières. Certains de ces produits, obtenus à partir de fil machine à section circulaire, sont connus. Le fait d'utiliser comme ébauche pour le tréfilage ou l'étirage un fil machine de section partiellement ou totalement polygonale selon l'invention simplifie considérablement le procédé de fabrication puisque la forme de la section transversale de l'ébauche peut être très proche de celle du produit tréfilé souhaité. Par ailleurs, on évite les fuites de lubrifiant entre le métal et- la filière qu'on obtient lorsque les géométries de l'ébauche et de la filière sont trop différentes. Le procédé de fabrication de fil étiré ou tréfilé de section partiellement ou totalement polygonale selon l'invention se caractérise en ce que l'on choisit, pour une section donnée du profilé final, une section d'ébauche telle que le nombre de passes d'étirage ou de tréfilage et de recuits peut être minimisé. Par rapport à un fil machine de section sensiblement circulaire, et en choisissant pour chaque passe d'étirage ou de tréfilage, un taux d'écrouissage E = (section d'entrée - section de sortie)/section de sortie proche de la valeur maximale (de l'ordre de 80% pour les alliages d'aluminium) que peut supporter le fil sans développer des défauts rédhibitoires, l'homme du métier peut définir, pour un fil en alliage d'aluminium ou de cuivre, une gamme de fabrication telle que le nombre de passes d'étirage ou de tréfilage et le nombre de recuits se trouvent chacun réduits d'au moins un tiers. Ce gain est plus grand pour les sections qui, au moins localement, s'écartent le plus d'une section circulaire (sections en V ou en T, méplats très allongés et notamment ceux ayant une section telle que le rapport de la largeur à l'épaisseur est supérieur à 2).These profiles can be used as such in many mechanical or electrical applications, or for the manufacture of welding wire. They can also be transformed by drawing or drawing in one or more passes, in order to give them dimensions, tolerances on dimensions and shape, or particular mechanical characteristics. Some of these products, obtained from wire rod with circular section, are known. The fact of using as a draft for drawing or drawing a machine wire of partially or totally polygonal section according to the invention considerably simplifies the manufacturing process since the shape of the cross section of the blank can be very close to that of the desired drawn product. Furthermore, lubricant leaks between the metal and the die are obtained, which are obtained when the geometries of the blank and of the die are too different. The process for manufacturing drawn or drawn wire of partially or totally polygonal section according to the invention is characterized in that one chooses, for a given section of the final profile, a rough section such that the number of passes of drawing or drawing and annealing can be minimized. Compared to a wire rod of substantially circular section, and by choosing for each drawing or drawing pass, a rate of work hardening E = (inlet section - outlet section) / outlet section close to the maximum value (of the order of 80% for aluminum alloys) that can be supported by the wire without developing unacceptable defects, the person skilled in the art can define, for an aluminum or copper alloy wire, a manufacturing range such that the number of drawing or drawing passes and the number of anneals are each reduced by at least one third. This gain is greater for the sections which, at least locally, deviate the most from a circular section (V or T sections, very elongated flats and in particular those having a section such as the ratio of the width to the thickness is greater than 2).
Le nombre exact de passes d'étirage ou de tréfilage dépend du type d'alliage utilisé, ainsi que des paramètres du procédé d'étirage ou de tréfilage. Pour des alliages d'aluminium et des profilés de section carrée ou triangulaire, on peut le plus souvent limiter l'étirage ou le tréfilage à une seule passe avec un recuit, au lieu d'au moins deux passes et deux recuits en partant d'une ébauche circulaire. Pour des profilés de section rectangulaire avec un rapport largeur sur épaisseur compris entre 1 et 2, on peut limiter l'étirage ou le tréfilage à deux passes et un recuit, et pour les rapports largeur sur épaisseur compris entre 2 et 5, à trois passes et deux recuits. Les profilés de section rectangulaire avec un rapport largeur sur épaisseur supérieur à 4 sont d'ailleurs très difficilement réalisables par tréfilage à partir d'une ébauche de section ronde, de sorte que le procédé selon l'invention permet un élargissement des possibilités de fabrication des tréfileries.The exact number of drawing or drawing passes depends on the type of alloy used, as well as on the parameters of the drawing or drawing process. For alloys aluminum and square or triangular section profiles, it is most often possible to limit the drawing or drawing to a single pass with annealing, instead of at least two passes and two anneals starting from a circular blank . For profiles of rectangular section with a width to thickness ratio between 1 and 2, it is possible to limit the drawing or the drawing to two passes and an annealing, and for the width to thickness ratios between 2 and 5, to three passes and two annealed. The profiles of rectangular section with a width to thickness ratio greater than 4 are moreover very difficult to produce by drawing from a blank of round section, so that the method according to the invention allows a widening of the possibilities of manufacturing the wire drawing.
Le procédé selon l'invention peut être utilisé pour une grande variété d'alliages métalliques, notamment des alliages d'aluminium, y compris des alliages à traitement thermique (séries 2000, 6000 et 7000), et des alliages cuivreux.The process according to the invention can be used for a wide variety of metal alloys, in particular aluminum alloys, including heat treatment alloys (series 2000, 6000 and 7000), and copper alloys.
ExemplesExamples
Pour l'ensemble des exemples, le métal a été coulé sur une machine de coulée continue du type à 3 roues, dans une roue à gorge conduisant à une ébauche de forme trapézoïdale, de plus grande largeur 41 mm et de hauteur 29 mm, soit une section d'ébauche de 1050 mm2.For all the examples, the metal was cast on a continuous casting machine of the 3-wheel type, in a grooved wheel leading to a trapezoidal blank, wider 41 mm and 29 mm high, i.e. a rough section of 1050 mm 2 .
Exemple 1Example 1
A partir d'une ébauche de section 1050 mm2, en alliage d'aluminium 5754 selon la désignation de l'Aluminum Association, on réalise un profilé de section carrée 13 x 13 mm, par laminage à travers 6 cages, comportant chacune un couple de galets de forme circulaire en acier Z38CDV5 traité à 52 HRC. A la sortie de chaque cage, on obtient les vitesses mentionnées au tableau 1, ainsi que les sections s'inscrivant dans les formats indiqués au même tableau: Tableau 1From a 1050 mm 2 section blank, made of 5754 aluminum alloy according to the designation of the Aluminum Association, a 13 x 13 mm square section profile is produced, by rolling through 6 cages, each comprising a pair of circular shaped rollers in Z38CDV5 steel treated at 52 HRC. At the exit from each cage, the speeds mentioned in table 1 are obtained, as well as the sections in the formats indicated in the same table: Table 1
Les 4 premières paires de galets ont des gorges délimitant une section circulaire, comme c'est le cas pour le laminage continu de profilés de forme circulaire. La cinquième paire de galets délimite un entrefer plat et la sixième délimite une section carrée très proche de celle du produit fini. L'entrefer entre les galets Ηe cette sixième paire est de 2 mm. Les rayons de courbure de la section des gorges des galets aux 4 sommets du carré sont de 3 mm. Les dépouilles sur les côtés du carré perpendiculaires à l'entrefer des galets sont de 1°.The first 4 pairs of rollers have grooves defining a circular section, as is the case for the continuous rolling of profiles of circular shape. The fifth pair of rollers delimits a flat air gap and the sixth delimits a square section very close to that of the finished product. The air gap between the rollers cettee this sixth pair is 2 mm. The radii of curvature of the section of the grooves of the rollers at the 4 vertices of the square are 3 mm. The remains on the sides of the square perpendicular to the air gap of the rollers are 1 °.
On n'obtient aucun collage du profilé sur les galets de sortie et les tolérances sur la section du profilé sont inférieures à 0, 1 mm.No bonding of the profile is obtained on the output rollers and the tolerances on the section of the profile are less than 0.1 mm.
Exemple 2Example 2
A partir d'une ébauche de même section que dans l'exemple précédent, on réalise un méplat de section rectangulaire 16,5 x 8, 1 mm en alliage d'aluminium 2017, par laminage continu à travers 6 cages. Les types de galets utilisés, les formats et les vitesses à la sortie de chaque cage sont mentionnés au tableau 2. Tableau 2From a blank of the same section as in the previous example, a flat 16.5 x 8, 1 mm rectangular section in 2017 aluminum alloy is produced by continuous rolling through 6 cages. The types of rollers used, the formats and the speeds at the exit of each cage are mentioned in Table 2. Table 2
Les 5 premières paires de galets ont des gorges standard analogues à celles utilisées pour le laminage des profilés de section circulaire. La sixième paire présente un entrefer de 1,5 mm et ses gorges délimitent un rectangle dont les sommets présentent un rayon de courbure de 2 mm et les côtés perpendiculaires à l'entrefer une dépouille de 1°. On n'observe aucun collage du profilé à la sortie de la dernière cage et les tolérances sur les dimensions du profilé sont inférieures à 0, 1 mm.The first 5 pairs of rollers have standard grooves similar to those used for rolling profiles of circular section. The sixth pair has an air gap of 1.5 mm and its grooves define a rectangle whose apices have a radius of curvature of 2 mm and the sides perpendicular to the air gap a draft of 1 °. No bonding of the profile is observed at the outlet of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
Exemple 3Example 3
On réalise un profilé en alliage d'aluminium 1370 ayant une section en forme générale de secteur circulaire, délimitée par un triangle en bas et un arc de cercle en haut, s'inscrivant dans un rectangle 16,2 x 12,2 mm, et de section 150 mm2. Les types de galets, les formats et les vitesses à la sortie de chaque cage sont indiqués au tableau 3. An aluminum alloy 1370 profile is produced having a section in the general shape of a circular sector, delimited by a triangle at the bottom and an arc of a circle at the top, forming part of a rectangle 16.2 x 12.2 mm, and 150 mm section 2 . The types of rollers, formats and speeds at the exit of each cage are shown in Table 3.
Tableau 3Table 3
Les 4 premières paires de galets ont des gorges standard analogues à celles des galets utilisés pour le laminage continu des profilés de section circulaire. Les gorges de la cinquième paire délimitent une section en forme de secteur La sixième paire a des gorges délimitant une section en forme de secteur circulaire, avec un rayon de courbure de 3 mm entre les 2 parties planes, une dépouille de 1° sur ces parties planes et un entrefer entre les 2 galets de 1,5 mm. La partie supérieure de la section, en forme d'arc de cercle est soigneusement polie. On n'observe aucun collage du profilé à la sortie de la dernière cage et les tolérances sur les dimensions du profilé sont inférieures à 0, 1 mm.The first 4 pairs of rollers have standard grooves similar to those of the rollers used for the continuous rolling of profiles of circular section. The grooves of the fifth pair define a sector-shaped section The sixth pair has grooves delimiting a circular sector-shaped section, with a radius of curvature of 3 mm between the 2 flat parts, a draft of 1 ° on these parts planes and an air gap between the two 1.5 mm rollers. The upper part of the section, in the shape of an arc of a circle, is carefully polished. No bonding of the profile is observed at the outlet of the last cage and the tolerances on the dimensions of the profile are less than 0.1 mm.
Exemple 4Example 4
On réalise un profilé, destiné à des applications électriques, en alliage d'aluminium 1370 de la forme représentée à la figure 4 de section 490 mm2. Les types de galets, les formats et les vitesses à la sortie de chaque cage sont indiqués au tableau 4: Tableau 4A profile is produced, intended for electrical applications, of aluminum alloy 1370 of the form shown in FIG. 4 of section 490 mm 2 . The types of rollers, formats and speeds at the exit of each cage are indicated in Table 4: Table 4
On n'utilise que 3 cages, dont seule la première a des galets standard. Le seconde cage a des galets plats et la troisième a des galets dont les gorges délimitent la section désirée. Pour cette dernière paire, les rayons de courbure aux sommets des angles vifs sont de 1,1 mm et les dépouilles sur les faces verticales de 1,5°. Les gorges sont très soigneusement polies. L'entrefer utilisé est de 2 mm.Only 3 cages are used, only the first of which has standard rollers. The second cage has flat rollers and the third has rollers whose grooves define the desired section. For this last pair, the radii of curvature at the vertices of the sharp angles are 1.1 mm and the undercuts on the vertical faces are 1.5 °. The grooves are very carefully polished. The air gap used is 2 mm.
Exemple 5Example 5
On réalise un fil carré de section carrée 10 x 10 mm en alliage d'aluminium 5754, destiné à la fabrication de goujons pour la fixation de manches en bakélite sur des ustensiles culinaires en aluminium, par tréfilage en une seule passe à partir du profilé de section carrée 13 x 13 mm décrit dans l'exemple 1. La gamme habituelle selon l'art antérieur partait d'une ébauche de section circulaire de diamètre 18 mm et comportait deux passes de tréfilage, séparées par un recuit-graissage au format 13 x 13 mm.We realize a square wire of square section 10 x 10 mm in aluminum alloy 5754, intended for the manufacture of studs for the fixing of bakelite handles on aluminum cooking utensils, by drawing in a single pass from the profile of square section 13 x 13 mm described in example 1. The usual range according to the prior art started from a circular section blank with a diameter of 18 mm and included two drawing passes, separated by an annealing-greasing in 13 x format 13 mm.
Exemple 6Example 6
On réalise un fil méplat de section 15,0 x 4,0 mm en alliage d'aluminium 2017 à partir d'un profilé méplat de section rectangulaire 16,5 x 8, 1 mm décrit dans l'exemple 2, par tréfilage en une trois passes de tréfilage, séparées par un recuit-graissage aux formats intermédiaires 16,0 x 6,3 mm et 15,65 x 4,45 mm. La gamme habituelle selon l'art antérieur partait d'une ébauche de section circulaire de diamètre 18 mm, et comportait 6 passes de tréfilage séparées à chaque fois par un recuit graissage aux formats intermédiaires: 17,3 x 13,8 mm, 16,6 x 10,7 mm, 16,2 x 8,2 mm, 16,0 x 16,3 mm, 15,65 x 4,85 mm. A flat wire of section 15.0 x 4.0 mm in aluminum alloy 2017 is produced from a flat section of rectangular section 16.5 x 8, 1 mm described in example 2, by drawing in one three wire drawing passes, separated by annealing-lubrication in intermediate formats 16.0 x 6.3 mm and 15.65 x 4.45 mm. The usual range according to the prior art started from a blank of circular section with a diameter of 18 mm, and included 6 drawing passes separated each time by an annealing and lubrication in intermediate formats: 17.3 x 13.8 mm, 16, 6 x 10.7 mm, 16.2 x 8.2 mm, 16.0 x 16.3 mm, 15.65 x 4.85 mm.

Claims

Revendications claims
1. Procédé de fabrication de profilés métalliques de section partiellement ou totalement polygonale par coulée continue dans une roue à gorge et laminage en continu à l'aide d'une série d'au moins 3 et préférentiellement de 3 à 8 paires de galets munis d'une gorge périphérique, ces galets étant disposés symétriquement par rapport au profilé, et alternativement horizontaux et verticaux, caractérisé en ce que:1. Method for manufacturing metal profiles of partially or totally polygonal section by continuous casting in a grooved wheel and continuous rolling using a series of at least 3 and preferably from 3 to 8 pairs of rollers provided with 'A peripheral groove, these rollers being arranged symmetrically with respect to the profile, and alternately horizontal and vertical, characterized in that:
- les gorges des premières paires de galets sont identiques à celles des galets utilisés pour la fabrication de profilés de section circulaire,the grooves of the first pairs of rollers are identical to those of the rollers used for the manufacture of profiles of circular section,
- la dernière paire de galets comporte des gorges délimitant une section correspondant sensiblement à celle du profilé désiré, - la section formée par les gorges de la dernière paire de galets présente aux sommets du polygone des rayons de courbure compris entre 1 et 5 mm,the last pair of rollers has grooves defining a section corresponding substantially to that of the desired profile, the section formed by the grooves in the last pair of rollers has radii of curvature between 1 and 5 mm at the vertices of the polygon,
- les côtés du polygone non parallèles à l'entrefer de la dernière paire de galets présentent, par rapport aux côtés correspondants de la section du profilé final une dépouille comprise entre Vi et 3°.- the sides of the polygon which are not parallel to the air gap of the last pair of rollers have, relative to the corresponding sides of the section of the final profile, a draft between Vi and 3 °.
2. Procédé selon la revendication 1, caractérisé en ce que le profilé a une section carrée ou rectangulaire.2. Method according to claim 1, characterized in that the profile has a square or rectangular section.
3. Procédé selon la revendication 2, caractérisé en ce que le profilé a une section rectangulaire avec un rapport largeur/épaisseur > 4.3. Method according to claim 2, characterized in that the profile has a rectangular section with a width / thickness ratio> 4.
4. Procédé selon la revendication 1, caractérisé en ce que le profilé a une section triangulaire.4. Method according to claim 1, characterized in that the profile has a triangular section.
5. Procédé selon la revendication 1, caractérisé en ce que le profilé a une section en forme de T ou de V. 5. Method according to claim 1, characterized in that the profile has a T-shaped or V-shaped section.
6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que les galets de P avant-dernière paire ont une surface plane.6. Method according to one of claims 1 to 5, characterized in that the rollers of P penultimate pair have a flat surface.
7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'il est suivi d'au moins une passe d'étirage ou de tréfilage et éventuellement d'au moins un recuit.7. Method according to one of claims 1 to 6, characterized in that it is followed by at least one drawing or drawing pass and optionally by at least one annealing.
8. Procédé selon la revendication 7, caractérisé en ce que: le nombre de passes de tréfilage et le nombre de recuits sont réduits chacun d'au moins un tiers par rapport à un procédé qui utiliserait comme ébauche d'étirage ou de tréfilage un fil machine de section sensiblement circulaire pour obtenir un produit semblable.8. Method according to claim 7, characterized in that: the number of wire drawing passes and the number of anneals are each reduced by at least a third compared to a process which would use as a draft or wire drawing blank machine of substantially circular section to obtain a similar product.
9. Procédé selon la revendication 8, caractérisée en ce que le profilé est en alliage d'aluminium, de section carrée ou triangulaire et que le procédé ne comprend qu'une passe d'étirage ou de tréfilage et qu'un recuit.9. Method according to claim 8, characterized in that the profile is made of aluminum alloy, of square or triangular section and that the method comprises only a drawing or drawing pass and an annealing.
10. Procédé selon la revendication 9, caractérisé en ce que l'alliage d'aluminium est un alliage de la série 5000.10. Method according to claim 9, characterized in that the aluminum alloy is an alloy of the 5000 series.
11. Procédé selon la revendication 10, caractérisé en ce que l'alliage d'aluminium est un alliage 5756.11. Method according to claim 10, characterized in that the aluminum alloy is an alloy 5756.
12. Procédé selon la revendication 8, caractérisé en ce que le profilé est en alliage d'aluminium de section rectangulaire avec un rapport de la largeur à l'épaisseur compris entre 2 et 5, et que le procédé comprend au plus 3 passes d'étirage ou de tréfilage et 2 recuits.12. The method of claim 8, characterized in that the profile is of aluminum alloy of rectangular section with a ratio of width to thickness between 2 and 5, and that the method comprises at most 3 passes of drawing or drawing and 2 annealing.
13. Procédé selon la revendication 12, caractérisé en ce que l'alliage d'aluminium est un alliage de la série 2000.13. Method according to claim 12, characterized in that the aluminum alloy is an alloy of the 2000 series.
14. Procédé selon la revendication 13, caractérisé en ce que l'alliage d'aluminium est un alliage 2017. 14. Method according to claim 13, characterized in that the aluminum alloy is a 2017 alloy.
5. Procédé selon la revendication 8, caractérisé en ce que le profilé est en alliage d'aluminium de section rectangulaire avec un rapport de la largeur à l'épaisseur compris entre 1 et 2, et que le procédé comprend au plus 2 passes d'étirage ou de tréfilage et un recuit. 5. Method according to claim 8, characterized in that the profile is of aluminum alloy of rectangular section with a ratio of the width to the thickness between 1 and 2, and that the method comprises at most 2 passes of drawing or drawing and annealing.
EP99925059A 1998-06-10 1999-06-09 Method for producing metal shapes with a polygonal cross-section by means of continuous casting on a double-flanged wheel and continuous rolling Expired - Lifetime EP1085949B1 (en)

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FR9807478 1998-06-10
FR9807478A FR2779672B1 (en) 1998-06-10 1998-06-10 METHOD FOR MANUFACTURING METAL PROFILES OF POLYGONAL SECTION BY CONTINUOUS CASTING ON A THREADED WHEEL AND CONTINUOUS LAMINATION
PCT/FR1999/001360 WO1999064176A1 (en) 1998-06-10 1999-06-09 Method for producing metal shapes with a polygonal cross-section by means of continuous casting on a double-flanged wheel and continuous rolling

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EP1085949A1 true EP1085949A1 (en) 2001-03-28
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KR100343771B1 (en) * 2000-04-27 2002-07-20 선남기 A method of preparing a coil spring with good tention
CN100464939C (en) * 2005-08-16 2009-03-04 吴乐瑞 Improved method for manufacturing slide carriage, and manufacturing equipment
CN101224544B (en) * 2008-01-30 2010-06-02 江阴华电新材料有限公司 Producing method of lead frame cuprum alloy strip with high strength and conductivity
RU2465081C1 (en) * 2011-06-24 2012-10-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Method of making cold-rolled sheets from aluminium and its alloys
DE102012013425A1 (en) * 2012-07-03 2014-01-09 Salzgitter Flachstahl Gmbh Continuous strip casting and rolling plant
CN104325099B (en) * 2014-11-25 2017-06-27 四川金岳新型材料有限公司 Aluminium alloy narrow boards band continuous casting and rolling device and method
PL3624963T3 (en) 2017-05-19 2022-01-31 Iq Power Licensing Ag Device for casting electrode supports for lead-acid batteries

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JP2002517316A (en) 2002-06-18
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WO1999064176A1 (en) 1999-12-16
FR2779672A1 (en) 1999-12-17
MXPA00012159A (en) 2002-04-17
UA57618C2 (en) 2003-06-16
CN1309591A (en) 2001-08-22
EP1085949B1 (en) 2001-12-05
ATE209975T1 (en) 2001-12-15
FR2779672B1 (en) 2000-07-28
CA2334851A1 (en) 1999-12-16
US6584669B1 (en) 2003-07-01
RU2217250C2 (en) 2003-11-27
BR9911085A (en) 2001-02-20
DE69900558D1 (en) 2002-01-17
AU4147999A (en) 1999-12-30
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CN1155446C (en) 2004-06-30
DK1085949T3 (en) 2002-07-08

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