EP0035718A1 - Process for the production of a deep-drawing sheet or strip from aluminum or - alloy - Google Patents
Process for the production of a deep-drawing sheet or strip from aluminum or - alloy Download PDFInfo
- Publication number
- EP0035718A1 EP0035718A1 EP81101433A EP81101433A EP0035718A1 EP 0035718 A1 EP0035718 A1 EP 0035718A1 EP 81101433 A EP81101433 A EP 81101433A EP 81101433 A EP81101433 A EP 81101433A EP 0035718 A1 EP0035718 A1 EP 0035718A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deep
- micro
- strip
- sheet
- rolling
- 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
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Definitions
- the invention relates to a deep-drawn sheet or strip made of non-ferrous metal or alloys made thereof, in particular aluminum, with a surface treated for deep drawing. Furthermore, the invention relates to a method for producing this sheet, strip, or the like.
- the film of lubricant is squeezed away from the hold-down device, so that the friction at this point of extreme stress quickly assumes an impermissible level and leads to the drawing part tearing. It is also known that an improvement in the friction in the drawing gap and in the hold-down he The aim is to use a roughened surface instead of the usual bright, matt rolled, brushed, ground or even deep-drawn foil-coated board surface, which enables the build-up of a high lubricant pressure on the tool-board contact surface.
- the invention is therefore based on the object of creating a sheet or strip suitable for deep drawing with an improved surface.
- a sheet, tape or the like characterized in that the surface has micro-roughness of about 0.8 to 5 / um, which show predominantly slender tips finely distributed on the surface.
- a drawn part with a micro-surface designed in this way creates very favorable frictional relationships between the hold-down device and the drawn part during deep drawing, which enables the material to flow into the die in a qualified manner and thus largely prevents the formation of cracks and wrinkles.
- Such a micro-surface leads to particularly favorable friction conditions when using a lubricant, because the sharp profiles of the roughness in connection with the attached hold-down seal the lubricant and prevent it from pushing away.
- micro-depressions are flattened or rounded in the area of their base to avoid a notch effect.
- micro-profile of the sheet has the lowest possible hardness.
- the easiest and best way to achieve the micro surface on a sheet or strip is by re-rolling if the roller is appropriately roughened by means of sandblasting.
- the rolling is carried out with at least one roughened roll in a last rolling pass with a decrease in thickness of at most 6%, preferably 3%.
- the rolling should take place in order to achieve a soft, recrystallized structure in the area of the micro elevations before the solution or soft annealing.
- the invention proposes a re-rolling with rollers, the rolling surface of which is sandblasted so that a largely uniform surface is formed which, due to a slight flattening of the blasted profiles on the roller, does not produce any sharp notches in the base of the profile thus rolled Bleches results.
- Ra was determined to be 1.5 to 3.3 / um.
- the roll pass must be carried out before soft or solution annealing, depending on the alloy used.
- Subsequent annealing softens the hardened profiles during re-rolling, making the tips easier to flatten out with the hold-down device.
- the annealing therefore meets the requirement for the softest possible characteristic of the micro-profile.
- the annealing should be such that its effect is aimed only at influencing the micro-profile and the mechanical-technological values of the base material are not undesirably influenced.
- the rolls to be used for re-rolling the sheets are expediently sandblasted in a cabin.
- the roller hardness should be at least 95 Shore-C.
- a jet of cast steel with a hardness of HRC 62 to 65 and grits No. 2 to No. 4 with a maximum grain size of 0.5 to 1.5 mm and sieved fine particles can be used.
- the spin speeds should be 50 to 150 m / s. Irradiation takes place with the roller rotating and the beam being axially displaced.
- the soft annealing is expediently carried out in a continuous strip furnace with or without protective gas.
- the throughput time through the furnace should be between 30 to 90 seconds, preferably 50 to 60 seconds, and the final temperature of the belt should be 400 to 550 ° C, preferably 490 to 520 ° C.
- the invention is not limited to the embodiment shown in FIGS. 1 and 2. Not all micro elevations need to have a uniform cone shape. The elevations can also differ in height, just as the cross-sectional areas parallel to the height or base axis can also be quite varied. On the other hand, it is essential that the micro-profiles are formed in an arrangement that is not aligned but offset against one another in the finest possible distribution on the sheet metal surface. This ensures that the material flows sufficiently and evenly into the die or the die and, when using a lubricant, largely prevents it from being pushed away.
- the invention is intended to cover all possible processes, such as chemical, mechanical, thermal or the like. Include species that are suitable for producing the proposed micro-surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
Die Erfindung betrifft ein tiefziehfähiges Blech oder Band aus Nichteisen-Metall oder Legierungen daraus, insbesondere aus Aluminium, mit einer für das Tiefziehen behandelten Oberfläche. Ferner betrifft die Erfindung ein Verfahren zur Herstellung dieses Bleches, Bandes, od. dgl.The invention relates to a deep-drawn sheet or strip made of non-ferrous metal or alloys made thereof, in particular aluminum, with a surface treated for deep drawing. Furthermore, the invention relates to a method for producing this sheet, strip, or the like.
Es ist bekannt, daß beim Tiefziehen von Blechen, insbesondere von relativ dünnen Blechen, den Reibungsverhältnissen zwischen Niederhalter und dem Ziehteil besondere Bedeutung zukommt, weil diese das Nachfließen des Werkstoffes in die Matrize beeinflussen. Um falten- und rißfreie Werkstücke zu erhalten, sind neben diesen Reibungsverhältnissen noch weitere Parameter, wie Werkstoff, Ziehteilform, Ziehspalt, Niederhalterdruck, usw. aufeinander abzustimmen. So kann die Faltenbildung am Ziehteil nicht durch unbegrenzte Erhöhung des Niederhalterdruckes verhindert werden, weil erhöhte Reibungskräfte zur Rißbildung im Ziehteil führen. Auch der Einsatz von Schmiermitteln erbringt nicht den erwünschten Erfolg , wenn die üblichen glatten oder gerichteten Oberflächenstrukturen verwendet werden. Der Schmiermittelfilm wird in diesem Falle vom Niederhalter weggequetscht, so daß die Reibung an dieser Stelle höchster Beanspruchung rasch ein unzulässiges Maß annimmt und zum Reißen des Ziehteiles führt. Es ist ferner bekannt, daß eine Verbesserung der Reibungsverhältnisse im Ziehspalt und im Niederhalter erzielt wird, wenn anstelle der üblichen walzblanken, mattgewalzten, gebürsteten, geschliffenen oder auch mit Tiefziehfolie beschichteten Platinen-Oberfläche eine gerauhte Oberfläche verwendet wird, die an der Berührungsfläche Werkzeug-Platine den Aufbau eines hohen Schmiermitteldruckes ermöglicht. So ist es bekannt, beim Walzen von Aluminium und Aluminiumlegierungen Arbeitswalzen mit riefenförmigen Vertiefungen, die durch Schleifen erzeugt werden (AT-PS 345 236), bzw. muldenförmigen Veräefungen, die durch Sandstrahlen erzeugt werden (AT-PS 347 387), anzuwenden, um einen großen Abwalzgrad von 70 - 95% zu erzielen, da durch die Vertiefungen das Schmiermittel beim Walzen festgehalten wird. Ein auf diese Weise erzeugtes Blech verhält sich jedoch beim nachfolgenden Tiefziehen nicht günstig, weil die Vertiefungen infolge des hohen Abwalzgrades durch eine starke Längserstreckung in Längsrichtung gezogen und somit gerichtet werden, worauf sie dem Schmiermittel beim Ziehen ein Ausweichen in dieser Richtung ermöglichen.It is known that in the deep-drawing of sheet metal, in particular of relatively thin sheet metal, the frictional relationships between the hold-down device and the drawn part are of particular importance, because these influence the flow of the material into the die. In order to obtain workpieces that are free of creases and cracks, other parameters such as material, shape of the drawn part, drawing gap, hold-down pressure, etc. must be coordinated with one another in addition to these friction conditions. For example, the formation of folds on the drawn part cannot be prevented by an unlimited increase in the hold-down pressure, because increased frictional forces lead to the formation of cracks in the drawn part. The use of lubricants does not achieve the desired success if the usual smooth or directional surface structures are used. In this case, the film of lubricant is squeezed away from the hold-down device, so that the friction at this point of extreme stress quickly assumes an impermissible level and leads to the drawing part tearing. It is also known that an improvement in the friction in the drawing gap and in the hold-down he The aim is to use a roughened surface instead of the usual bright, matt rolled, brushed, ground or even deep-drawn foil-coated board surface, which enables the build-up of a high lubricant pressure on the tool-board contact surface. It is known, for example, to use work rolls with groove-shaped depressions which are produced by grinding (AT-PS 345 236) or trough-shaped cases which are produced by sandblasting (AT-PS 347 387) when rolling aluminum and aluminum alloys to achieve a high rolling degree of 70 - 95%, since the lubricant is held in place by the recesses during rolling. A sheet produced in this way, however, does not behave favorably in the subsequent deep drawing, because the depressions are drawn in the longitudinal direction and thus directed due to the high degree of rolling, so that they enable the lubricant to evade in this direction during the drawing.
Der Erfindung liegt daher die Aufgabe zugrunde, ein zum Tiefziehen geeignetes Blech oder Band mit einer verbesserten Oberfläche zu schaffen.The invention is therefore based on the object of creating a sheet or strip suitable for deep drawing with an improved surface.
Zur Lösung dieser Aufgabe ist ein Blech, Band od.dgl. dadurch gekennzeichnet, daß die Oberfläche Mikrorauhigkeiten von etwa 0,8 bis 5 /um aufweist, die auf die Oberfläche fein verteilt überwiegend schlanke Spitzen zeigen.To solve this problem is a sheet, tape or the like. characterized in that the surface has micro-roughness of about 0.8 to 5 / um, which show predominantly slender tips finely distributed on the surface.
Es hat sich gezeigt, daß ein Ziehteil mit einer derart ausgebildeten Mikro-Oberfläche beim Tiefziehen sehr günstige Reibungsverhältnisse zwischen Niederhalter und Ziehteil schafft, die ein qualifiziertes Nachfließen des Werkstoffes in die Matrize ermöglichen und so die Risse-und Faltenbildung weitgehend vermieden wird. Eine solche Mikro-Oberfläche führt bei Anwendung eines Schmiermittels zu besonders günstigen Reibungsverhältnissen, weil die spitzen Profile der Rauhigkeiten in Verbindung mit dem aufgesetzten Niederhalter das Schmiermittel abdichten und am Wegdrücken hindern.It has been shown that a drawn part with a micro-surface designed in this way creates very favorable frictional relationships between the hold-down device and the drawn part during deep drawing, which enables the material to flow into the die in a qualified manner and thus largely prevents the formation of cracks and wrinkles. Such a micro-surface leads to particularly favorable friction conditions when using a lubricant, because the sharp profiles of the roughness in connection with the attached hold-down seal the lubricant and prevent it from pushing away.
Besonders vorteilhaft ist es, wenn die Mikro-Vertiefungen im Bereich ihres Grundes zur Vermeidung einer Kerbwirkung abgeflacht oder abgerundet sind.It is particularly advantageous if the micro-depressions are flattened or rounded in the area of their base to avoid a notch effect.
Es hat sich ferner als besonders vorteilhaft erwiesen, wenn das Mikro-Profil des Bleches eine möglichst niedrige Härte aufweist.It has also proven to be particularly advantageous if the micro-profile of the sheet has the lowest possible hardness.
Erfindungsgemäß läßt sich die Mikro-Oberfläche an einem Blech oder Band am einfachsten und besten durch Nachwalzen erreichen, wenn die Walze mittels Sandstrahlung entsprechend aufgerauht ist.According to the invention, the easiest and best way to achieve the micro surface on a sheet or strip is by re-rolling if the roller is appropriately roughened by means of sandblasting.
Zweckmäßig ist es, wenn die Walzung mit mindestens einer aufgerauhten Walze in einem letzten Walzgang mit einer Dickenabnahme von höchstens 6%, vorzugsweise 3%, erfolgt.It is expedient if the rolling is carried out with at least one roughened roll in a last rolling pass with a decrease in thickness of at most 6%, preferably 3%.
Die Walzung soll zur Erzielung eines weichen, rekristallisierten Gefüges im Bereich der Mikroerhebungen vor dem Lösungs- oder Weichglühen erfolgen.The rolling should take place in order to achieve a soft, recrystallized structure in the area of the micro elevations before the solution or soft annealing.
Nachfolgend wird ein Aluminiumblech bzw. -band gemäß der Erfindung beschrieben, das auch in der Zeichnung schematisch dargestellt ist. Es zeigen:
- Fig. 1 einen Blechquerschnitt mit einem spitzen Oberflächen-Profil,
- Fig. 2 einen Schnitt durch das gleiche Blech, jedoch mit aufgedrücktem Niederhalter und
- Fig. 3 einen Blechquerschnitt mit einer ungünstigeren Mikro-Oberfläche.
- 1 is a sheet metal cross section with a pointed surface profile,
- Fig. 2 shows a section through the same sheet, but with pressed down and
- Fig. 3 shows a sheet metal cross section with an unfavorable micro surface.
Um diese gewünschte Mikro-Oberfläche zu erhalten, schlägt die Erfindung ein Nachwalzen mit Walzen vor, deren Walzfläche so sandgestrahlt ist, daß eine weitgehend gleichmäßige Oberfläche entsteht, die durch eine geringfügige Abplattung der gestrahlten Profile auf der Walze keine scharfen Kerben im Profilgrund des damit gewalzten Bleches ergibt. Als optimale Rauhigkeit wurde Ra mit 1,5 bis 3,3 /um ermittelt. Um eine Ausrichtung bzw. Orientierung der Oberflächenstruktur durch die Verformung zu vermeiden, ist es außerdem günstig, den Walzstich nicht wesentlich größer als 3% zu wählen. Insbesondere für komplizierte Ziehteile, bei denen bis an die Grenze der Verformbarkeit gegangen wird, ist der Walzstich vor einem Weich- oder Lösungsglühen, je nach eingesetzter Legierung, durchzuführen. Durch das nachträgliche Glühen werden die beim Nachwalzen erhärteten Profile wieder erweicht, wodurch die Spitzen durch den Niederhalter leichter abgeplattet werden können. Das Glühen kommt somit der Forderung nach einer möglichst weichen Charakteristik des Mikro-Profiles nach. Die Glühung soll so beschaffen sein, daß ihre Wirkung möglichst nur auf eine Beeinflussung des Mikro-Profiles ausgerichtet ist und die mechanisch technologischen Werte des Grundmaterials nicht unerwünscht beeinflußt werden.In order to obtain this desired micro-surface, the invention proposes a re-rolling with rollers, the rolling surface of which is sandblasted so that a largely uniform surface is formed which, due to a slight flattening of the blasted profiles on the roller, does not produce any sharp notches in the base of the profile thus rolled Bleches results. As an optimal roughness Ra was determined to be 1.5 to 3.3 / um. In order to avoid an alignment or orientation of the surface structure due to the deformation, it is also advantageous not to select the roll pass significantly larger than 3%. Especially for complicated drawn parts, where the deformability is reached, the roll pass must be carried out before soft or solution annealing, depending on the alloy used. Subsequent annealing softens the hardened profiles during re-rolling, making the tips easier to flatten out with the hold-down device. The annealing therefore meets the requirement for the softest possible characteristic of the micro-profile. The annealing should be such that its effect is aimed only at influencing the micro-profile and the mechanical-technological values of the base material are not undesirably influenced.
Die zum Nachwalzen der Bleche zu verwendenden Walzen werden zweckmäßig in einer Kabine sandgestrahlt. Die Walzenhärte soll mindestens 95 Shore-C betragen. Dazu kann ein Strahl aus Stahlgußbruch mit einer Härte HRC 62 bis 65 und den Körnungen Nr. 2 bis Nr. 4 bei einer maximalen Korngröße 0,5 bis 1,5 mm und abgesiebtem Feinanteil verwendet werden. Die Schleudergeschwindigkeiten sollen 50 bis 150 m/s betragen. Die Bestrahlung erfolgt bei rotierender Walze und unter Axialverschiebung des Strahles.The rolls to be used for re-rolling the sheets are expediently sandblasted in a cabin. The roller hardness should be at least 95 Shore-C. For this purpose, a jet of cast steel with a hardness of HRC 62 to 65 and grits No. 2 to No. 4 with a maximum grain size of 0.5 to 1.5 mm and sieved fine particles can be used. The spin speeds should be 50 to 150 m / s. Irradiation takes place with the roller rotating and the beam being axially displaced.
Das Weichglühen wird zweckmäßig in einem kontinuierlich arbeitenden Banddurchzugsofen mit oder ohne Schutzgas durchgeführt. Die Durchlaufzeit durch den Ofen soll zwischen 30 bis 90 Sekunden, vorzugsweise 50 bis 60 Sekunden, und die Endtemperatur des Bandes 400 bis 550°C, vorzugsweise 490 bis 520°C, betragen.The soft annealing is expediently carried out in a continuous strip furnace with or without protective gas. The throughput time through the furnace should be between 30 to 90 seconds, preferably 50 to 60 seconds, and the final temperature of the belt should be 400 to 550 ° C, preferably 490 to 520 ° C.
Die Versuche zur Beurteilung der Verbesserung der Tiefziehfähigkeit durch Erzeugen einer Mikro-Oberfläche wurden mit den Aluminiumlegierungen AlMg4 und AlMg Si für großflächige, komplizierte Tiefziehteile für die Fahrzeugindustrie mit Platinengrößen von 900 x 1.550 mm durchgeführt. Zum Vergleich wurden Platinen aus den gleichen Werkstoffen, jeweils sogar aus den gleichen Warmbändern, aber mit walzblanker und matter sowie mit Tiefziehfolie beschichteter mattgewalzter Oberfläche herangezogen. Die Platinendicke war 1,0 mm. Alle Platinen, auch die kunststoffbeschichteten wurden befettet. Bei den Tiefziehversuchen mit den erfindungsgemäß ausgeführten Mikro-Oberflächen zeigte bereits der um 10-15% niedrigere Preßdruck, der zur Herstellung des Tiefziehteiles notwendig war, den Einfluß auf die Reibungsverhältnisse. Die gewählten, komplizierten Tiefziehkörper ergaben bei den Vergleichsvarianten 30 bis 100% Ausschuß durch Rißbildung, während von 40 tiefgezogenen Teilen mit der gewählten Mikro-Oberfläche, erzeugt durch Walzen, Ra = 1,8 /um, kein Ausschuß entstand. Weiters war die Faltenbildung, zu deren Vermeidung bei den Vergleichsblechen ein relativ hoher Niederhalterdruck erforderlich war, bei den Blechen mit Mikro-Oberfläche deutlich geringer, so daß zur weiteren Erhöhung der Sicherheit gegen Reißen, der Niederhalterdruck sogar etwas reduziert werden konnte.The tests to assess the improvement of the deep-drawing ability by producing a micro surface were carried out with the aluminum alloys AlMg4 and AlMg Si for large-area, complex deep-drawn parts for the automotive industry with board sizes of 900 x 1,550 mm. For comparison, blanks made of the same materials, in each case even from the same hot strips, but with bright-rolled and matt, as well as matt-rolled surface coated with thermoformed film, were used. The board thickness was 1.0 mm. All boards, including the plastic-coated ones, were greased. In the deep-drawing tests with the micro-surfaces designed according to the invention, the 10-15% lower pressing pressure, which was necessary for the production of the deep-drawn part, already showed the influence on the friction conditions. The selected, complicated deep-drawn body resulted in the comparison variants 30 to 100% rejection by cracking, while of 40 deep-drawn parts with the selected micro-surface, he testifies by rolling, Ra = 1.8 / um, no scrap was created. Furthermore, the formation of folds, to avoid which a relatively high hold-down pressure was necessary in the comparative sheets, was significantly lower in the sheets with a micro-surface, so that the hold-down pressure could even be reduced somewhat to further increase security against tearing.
Die Erfindung beschränkt sich nicht auf das in den Fig. 1 und 2 dargestellte Ausführungsbeispiel. So müssen nicht sämtliche Mikro-Erhebungen eine gleichmäßige Kegelform aufweisen. Die Erhebungen können in der Höhe auch voneinander abweichen, wie auch die Querschnittsflächen parallel zur Höhen- oder Basisachse durchaus recht vielgestaltig sein können. Wesentlich hingegen ist, daß die - Mikro-Profile in nicht ausgerichteter, sondern gegeneinander versetzter Anordnung in möglichst feiner Verteilung auf der Blech-Oberfläche ausgebildet sind. Dadurch wird ein ausreichendes und gleichmäßiges Nachfließen des Werkstoffes in die Matrize bzw. das Gesenk erreicht und bei Anwendung eines Schmiermittels zudem ein Wegdrücken desselben weitgehend verhindert.The invention is not limited to the embodiment shown in FIGS. 1 and 2. Not all micro elevations need to have a uniform cone shape. The elevations can also differ in height, just as the cross-sectional areas parallel to the height or base axis can also be quite varied. On the other hand, it is essential that the micro-profiles are formed in an arrangement that is not aligned but offset against one another in the finest possible distribution on the sheet metal surface. This ensures that the material flows sufficiently and evenly into the die or the die and, when using a lubricant, largely prevents it from being pushed away.
Bei einem Mikro-Profil gemäß Fig. 3 der Zeichnung mit sehr unregelmäßig verteilten, blockartigen Erhebungen 10 und mit größeren Zwischenräumen 11, einer sogenannten Tafelberg-Oberfläche, lassen sich nicht die vorerwähnten Vorteile erzielen.In the case of a micro-profile according to FIG. 3 of the drawing with very irregularly distributed, block-
Die Erfindung soll alle möglichen Verfahren, wie chemischer, mechanischer, thermischer od.dgl. Art einschliessen, die geeignet sind, die vorgeschlagene Mikro-Oberfläche herzustellen.The invention is intended to cover all possible processes, such as chemical, mechanical, thermal or the like. Include species that are suitable for producing the proposed micro-surface.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81101433T ATE8853T1 (en) | 1980-03-06 | 1981-02-27 | PROCESS FOR THE MANUFACTURE OF A DEEP-DRAWABLE SHEET, STRIP OR LIKE. MADE OF ALUMINUM OR ALLOYS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3008679A DE3008679C2 (en) | 1980-03-06 | 1980-03-06 | Deep-drawable sheet metal or strip made of non-ferrous metal or an alloy thereof, in particular made of aluminum, as well as a method for its production |
DE3008679 | 1980-03-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0035718A1 true EP0035718A1 (en) | 1981-09-16 |
EP0035718B1 EP0035718B1 (en) | 1984-08-08 |
Family
ID=6096480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81101433A Expired EP0035718B1 (en) | 1980-03-06 | 1981-02-27 | Process for the production of a deep-drawing sheet or strip from aluminum or - alloy |
Country Status (4)
Country | Link |
---|---|
US (1) | US4634475A (en) |
EP (1) | EP0035718B1 (en) |
AT (1) | ATE8853T1 (en) |
DE (1) | DE3008679C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0111624A1 (en) * | 1982-12-13 | 1984-06-27 | Aluminio De Galicia, S.A. | Improvements in and to aluminium discs for the manufacture of metal containers by impact extrusion |
EP0289775A3 (en) * | 1987-04-25 | 1990-05-23 | Vereinigte Aluminium-Werke Aktiengesellschaft | Deep-drawable sheet or strip made from aluminium or aluminium alloys, and process for its manufacture |
EP0690142A1 (en) * | 1994-06-09 | 1996-01-03 | The Furukawa Electric Co., Ltd. | Aluminium alloy sheet for auto body sheet, method for manufacturing same and method for forming same |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3705100A1 (en) * | 1987-02-18 | 1988-09-01 | Benecke Gmbh J | METHOD FOR PRODUCING A SURFACE STRUCTURE OF IMPELLING ROLLERS, AND PRINCING ROLLER PRODUCED BY THE METHOD |
US5305362A (en) * | 1992-12-10 | 1994-04-19 | Hewlett-Packard Company | Spur reduction for multiple modulator based synthesis |
EP1166905B1 (en) * | 2000-06-29 | 2005-10-05 | Corus Aluminium N.V. | Method for producing an aluminium sheet and aluminium sheet |
DE10221515C1 (en) * | 2002-05-14 | 2003-11-13 | Hydro Aluminium Deutschland | Aluminium tube manufacturing method using dressing rollers for texturing outer surface of aluminium tube |
CN101885019B (en) * | 2010-06-24 | 2013-01-02 | 镇江源龙铝业有限责任公司 | Method for manufacturing dual-roller rolling wire-drawing aluminum tape |
CN111378911B (en) * | 2020-04-27 | 2021-06-15 | 广东万和热能科技有限公司 | Shot blasting process method for aluminum casting |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2549249A1 (en) * | 1974-11-06 | 1976-08-12 | Lorraine Laminage | DEEP DRAWING PLATE AND METHOD FOR ITS PRODUCTION |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3487674A (en) * | 1965-06-06 | 1970-01-06 | Fuji Iron & Steel Co Ltd | Method of producing cold rolled steel sheets suitable for press forming |
CH574280A5 (en) * | 1973-10-17 | 1976-04-15 | Alusuisse | |
CH574281A5 (en) * | 1973-10-17 | 1976-04-15 | Alusuisse |
-
1980
- 1980-03-06 DE DE3008679A patent/DE3008679C2/en not_active Expired
-
1981
- 1981-02-27 AT AT81101433T patent/ATE8853T1/en active
- 1981-02-27 EP EP81101433A patent/EP0035718B1/en not_active Expired
-
1982
- 1982-12-27 US US06/453,176 patent/US4634475A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2549249A1 (en) * | 1974-11-06 | 1976-08-12 | Lorraine Laminage | DEEP DRAWING PLATE AND METHOD FOR ITS PRODUCTION |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0111624A1 (en) * | 1982-12-13 | 1984-06-27 | Aluminio De Galicia, S.A. | Improvements in and to aluminium discs for the manufacture of metal containers by impact extrusion |
EP0289775A3 (en) * | 1987-04-25 | 1990-05-23 | Vereinigte Aluminium-Werke Aktiengesellschaft | Deep-drawable sheet or strip made from aluminium or aluminium alloys, and process for its manufacture |
EP0690142A1 (en) * | 1994-06-09 | 1996-01-03 | The Furukawa Electric Co., Ltd. | Aluminium alloy sheet for auto body sheet, method for manufacturing same and method for forming same |
Also Published As
Publication number | Publication date |
---|---|
DE3008679A1 (en) | 1981-09-10 |
DE3008679C2 (en) | 1983-08-18 |
ATE8853T1 (en) | 1984-08-15 |
US4634475A (en) | 1987-01-06 |
EP0035718B1 (en) | 1984-08-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3881906T2 (en) | Process for surface marking of rolling mill rolls. | |
EP0438031B1 (en) | Method for machining the surface of workpieces and workpiece manufactured with this method | |
DE69423784T2 (en) | METHOD AND DEVICE FOR THE PRODUCTION OF COLD-ROLLED METAL SHEETS OR STRIPS, AND METAL SHEETS OR STRIPS RECOVERED FROM THEM | |
DE2843449C2 (en) | ||
DE2438232A1 (en) | METHOD OF FORMING PLATE MADE OF SUPERPLASTIC ALLOYS | |
EP0035718B1 (en) | Process for the production of a deep-drawing sheet or strip from aluminum or - alloy | |
DE102019214135A1 (en) | Sheet steel with a deterministic surface structure | |
DE102019214133A1 (en) | Sheet steel with a deterministic surface structure | |
DE2549249B2 (en) | Deep-drawn sheet and process for its manufacture | |
CH633206A5 (en) | CHOCOLATE WITH Roughened Surface For Casting Metals. | |
DE2938812B2 (en) | Method for producing a rolling bearing race | |
EP0289775A2 (en) | Deep-drawable sheet or strip made from aluminium or aluminium alloys, and process for its manufacture | |
DE2906509A1 (en) | METHOD FOR SHAPING WITH A FABRIC RAY GETTING ON ONE SIDE OF AN OBJECT TO BE AFFECTED | |
DE1239893B (en) | Method for producing a thin disc spring | |
DE1521197B2 (en) | Process for the production of bimetal strips for storage material | |
DE1483023A1 (en) | Method for producing a narrowed leaf spring | |
DE19529429A1 (en) | Thin sheet, rolling mill roll for thin sheet production, process for structuring the surface of the rolling mill roll and its use | |
DE3111148C2 (en) | ||
DE2937108A1 (en) | METHOD FOR RETURNING SLIDING ALLOYS, IN PARTICULAR SLIDING BEARING ALLOYS | |
DE2046653C3 (en) | Process for the production of cold-rolled metal strips or sheets provided with at least one protective coating | |
DE2448147C2 (en) | Work roll for hot or cold rolling of non-ferrous metals, in particular aluminum and aluminum alloys | |
DE1912269A1 (en) | Method and device for weakening strip material in the roll forming process | |
CH618114A5 (en) | Method and arrangement for producing a profiled metal billet | |
DE2419382C3 (en) | Process for separating parts from cold-rolled steel strip | |
DE4007795A1 (en) | PROCESS AND DISCONNECTING AND GRINDING WHEEL PRODUCED THEREOF |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19811008 |
|
ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO MILANO S.P.A. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT FR GB IT NL SE |
|
REF | Corresponds to: |
Ref document number: 8853 Country of ref document: AT Date of ref document: 19840815 Kind code of ref document: T |
|
ET | Fr: translation filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19841228 Year of fee payment: 5 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: SCHWEIZERISCHE ALUMINIUM AG Effective date: 19850503 |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: AUSTRIA METALL AKTIENGESELLSCHAFT |
|
NLT1 | Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1 |
Owner name: AUSTRIA METALL AKTIENGESELLSCHAFT TE BRAUNAU A.D. |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: SCHWEIZERISCHE ALUMINIUM AG |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19851202 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19860228 Year of fee payment: 6 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19870227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19870228 |
|
RDAG | Patent revoked |
Free format text: ORIGINAL CODE: 0009271 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
|
27W | Patent revoked |
Effective date: 19870812 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
NLR2 | Nl: decision of opposition | ||
GBPR | Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 81101433.1 Effective date: 19880215 |