EP0040316A1 - Method of profiling a metal strip, particularly of a band in double band presses - Google Patents

Method of profiling a metal strip, particularly of a band in double band presses Download PDF

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Publication number
EP0040316A1
EP0040316A1 EP81102726A EP81102726A EP0040316A1 EP 0040316 A1 EP0040316 A1 EP 0040316A1 EP 81102726 A EP81102726 A EP 81102726A EP 81102726 A EP81102726 A EP 81102726A EP 0040316 A1 EP0040316 A1 EP 0040316A1
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Prior art keywords
tool
press
circumference
profiling
division
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EP81102726A
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German (de)
French (fr)
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EP0040316B1 (en
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Kurt Held
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/06—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by positive or negative engaging parts co-operating with corresponding parts of the sheet or the like to be processed, e.g. carrier bolts or grooved section in the carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets

Definitions

  • the invention relates to a method for profiling metal strips, in particular press strips in double belt presses.
  • the profiling of the workpiece surfaces in this case of Preßbandober - tracts, can be carried out for the purpose of shaping by stamping or by removal or removal of material on the workpiece; the latter is generally known as so-called machining or machining. This includes, for example, chiseling, planing, shaping, sawing, turning, milling, grinding, drilling, etc.
  • Electrothermal ablation takes place in a stationary discharge process in the arc, the ablation process being purely thermal in nature.
  • the erosion is carried out by spark erosion, in which the discharge processes are not stationary, but are controlled by special energy sources that supply the spark gap with pulsed energy surges.
  • the electrodes can support additional mechanical oscillation and rotation movements to support the removal effect.
  • the removal by electrochemical means or also called electrochemical lowering takes place in that the cathodically polarized machining tool or the tool electrode is lowered into the anodically polarized workpiece or the workpiece electrode at a constant feed rate.
  • electrochemical lowering takes place in that the cathodically polarized machining tool or the tool electrode is lowered into the anodically polarized workpiece or the workpiece electrode at a constant feed rate.
  • a working gap is formed between the workpiece and the tool, through which the electrolytic solution flows at high speed and thereby removes the removal products and the heat generated by the current flow.
  • the circumference of the tool (or the electrode in the electrothermal and electrochemical processes) and the circumference of the roll to be profiled are dimensioned such that the repeat length on the circumference of the roll to be profiled can usually be accommodated several times as an integer.
  • the inventor has the task of transferring this state of the art, which is known in the case of printing and embossing rollers, to the profiling of press belts for double belt presses, the length of which deviates from the ratios of rollers by a multiple of conventional roller circumferences and, moreover, can only be determined with great effort . To make matters worse, this length must be maintained for the time of processing or its change must be measured or influenced continuously.
  • the inventive teaching provides for the circumference of the to be processed press belt outside the area to be contoured portion of the Preßbandober ⁇ 'ambae a pitch to install, which is or with a corresponding division of the profiling tool into engagement the evaluated by electronic or mechanical means, a synchronization of tool and workpiece rolling when imaging the surface profile by electrothermal, electrochemical or forming processing.
  • the division of the press belt circumference corresponds to an integral multiple of the division of the tool circumference or of the repeat lying on the tool circumference, if this is not identical to the tool circumference.
  • a forced synchronization between the jacket of the synchronously driven deflection drum and the press belt can be accomplished, for example, with the help of toothing, as described in the published patent application No. 2,737,629.
  • a toothing is arranged on the side edges of the steel strips, which engages in a corresponding end toothing of a hollow gear on the deflection drum.
  • the press belt is tensioned over two deflecting drums and driven via the edge teeth.
  • the tool or the tool electrode is brought into engagement at a suitable point on the press belt tensioned on the deflection drums and driven in the direction of rolling. If the two drives are mechanically synchronized via known differential gears or electronically via also known position control systems, then the surface profiling of press belts for double belt presses can be achieved without any problems, whereby a surface image between tool and workpiece that goes down to the finest details is achieved.
  • the accompanying drawing shows schematically the molding process according to the method of the invention.
  • the belt 2 to be profiled which is driven in the direction of the arrow 6, is stretched over the drum 1.
  • the reference numeral 3 designates the tool or the tool electrode, the surface 4 of which is molded onto the workpiece 2. The impression is taken in the synchronization area 5 of workpiece 2 and tool 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zum Profilieren von Metallbändern (2), insbesondere von Preßbändern in Doppelbandpressen, das dadurch gekennzeichnet ist, daß man am Umfang des Preßbandes (2) außerhalb des zu profilierenden Teiles der Preßbandoberfläche eine Teilung vorsieht, die mit einer entsprechenden Teilung des Profilierwerkzeugs (3) in Eingriff steht und die, mit elektronischen oder mechanischen Mitteln ausgewertet, eine Synchronisierung von Werkzeug- und Werkstückabwälzung bei der Abbildung des Oberflächenprofils durch elektrothermisches, elektrochemisches oder umformendes Bearbeiten erlaubt. Dabei entspricht die Teilung des Preßbandumfanges einem ganzzahligen Vielfachen der Teilung des Werkzeugumfanges, sodaß der Anfang der Preßbandstruktur und ihr Ende ohne sichtbare Übergänge ineinander übergehen. Das Verfahren hat deshalb besondere Bedeutung, weil es die Profilierung von Preßbändern für Doppelbandpressen erlaubt, deren Länge abweichend von den Verhältnissen bei Walzen ein Mehrfaches üblicher Walzenumfänge beträgt und darüberhinaus nur mit großem Aufwand bestimmbar ist, weil die Länge während der Bearbeitungszeit beibehalten oder deren Änderung stetig gemessen oder beeinflußt werden muß.The invention relates to a method for profiling metal bands (2), in particular press bands in double band presses, which is characterized in that a division is provided on the circumference of the press band (2) outside the part of the press band surface to be profiled, with a corresponding division of the Profiling tool (3) is engaged and which, evaluated by electronic or mechanical means, allows synchronization of tool and workpiece rolling when imaging the surface profile by means of electrothermal, electrochemical or shaping processing. The division of the press belt circumference corresponds to an integer multiple of the division of the tool circumference, so that the beginning of the press belt structure and its end merge into one another without visible transitions. The method is particularly important because it allows the profiling of press belts for double belt presses, the length of which deviates from the conditions for rollers by a multiple of the usual roller circumferences and, moreover, can only be determined with great effort because the length is maintained during the machining time or the change is constant must be measured or influenced.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Profilieren von Metallbändern, insbesondere von Preßbändern in Doppelbandpressen.The invention relates to a method for profiling metal strips, in particular press strips in double belt presses.

Das Profilieren von Werkstückoberflächen, in diesem Fall von Preßbandober- flächen, kann durch Prägen oder durch Entfernen oder Abtragen von Werkstoff am Werkstück zum Zwecke der Formgebung erfolgen; letzteres ist als sogenannte spanende oder spanabhebende Bearbeitung allgemein bekannt. Hierzu gehören beispielsweise das Meißeln, Hobeln, Stoßen, Sägen, Drehen, Fräsen, Schleifen, Bohren usw.The profiling of the workpiece surfaces, in this case of Preßbandober - tracts, can be carried out for the purpose of shaping by stamping or by removal or removal of material on the workpiece; the latter is generally known as so-called machining or machining. This includes, for example, chiseling, planing, shaping, sawing, turning, milling, grinding, drilling, etc.

Es ist weiter bekannt, das Abtragen von Material auf elektrothermischem, funkenerosivem oder elektrochemischem Wege vorzunehmen. Das elektrothermische Abtragen erfolgt in einem stationären Entladungsvorgang im Lichtbogen, wobei der Abtragevorgang rein thermischer Natur ist. Beim elektroerosiven Verfahren erfolgt das Abtragen durch Funkenerosion bei der die Entladungsvorgänge nicht stationär sind, sondern durch besondere Energiequellen gesteuert werden, die die Funkenstrecke mit impulsartigen Energiestößen versorgen. Dabei können die Elektroden zur Unterstützung der Abtragewirkung zusätzliche mechanische Schwing- und Rotationsbewegungen ausführen. Durch Einbringen einer dielektrischen Arbeitsflüssigkeit zwischen die Elektroden kann ihre Entfernung voneinander wesentlich verringert werden, wodurch die Abtragewirkung der Entladung ganz erheblich vergrößert werden kann. Das Abtragen auf elektrochemischem Wege oder auch elektrochemisches Senken genannt geschieht dadurch, daß man das kathodisch gepolte Bearbeitungswerkzeug oder die Werkzeugelektrode mit konstanter Vorschubgeschwindigkeit in das anodisch gepolte Werkstück oder die Werkstückelektrode einsenkt. Zwischen Werkstück und Werkzeug bildet sich prozeßbedingt ein Arbeitsspalt aus, durch den die Elektrolytlösung mit hoher Geschwindigkeit strömt und dabei die im Arbeitsspalt entstehenden Abtragprodukte und die durch den Stromfluß entstehende Wärme abführt.It is also known to carry out the removal of material by electrothermal, spark erosive or electrochemical means. Electrothermal ablation takes place in a stationary discharge process in the arc, the ablation process being purely thermal in nature. In the electroerosive process, the erosion is carried out by spark erosion, in which the discharge processes are not stationary, but are controlled by special energy sources that supply the spark gap with pulsed energy surges. The electrodes can support additional mechanical oscillation and rotation movements to support the removal effect. By introducing a dielectric working fluid between the electrodes, their distance from one another can be significantly reduced, as a result of which the removal effect of the discharge can be increased considerably. The removal by electrochemical means or also called electrochemical lowering takes place in that the cathodically polarized machining tool or the tool electrode is lowered into the anodically polarized workpiece or the workpiece electrode at a constant feed rate. Depending on the process, a working gap is formed between the workpiece and the tool, through which the electrolytic solution flows at high speed and thereby removes the removal products and the heat generated by the current flow.

Schließlich kann man eine Formgebung auch mit. Hilfe von Prägewalzen oder Moletten durchführen. Das Molettieren erfolgt dadurch, daß man die profilierte Oberfläche einer unter Druck stehenden Formwalze auf der zu profilierenden Fläche abformt.Finally, you can also use a shape. Carry out embossing rollers or molettes. Mettling takes place by molding the profiled surface of a press roll under pressure on the surface to be profiled.

Es sind nun eine Reihe von Verfahren und Vorrichtungen zum elektroerosiven oder elektrochemischen Bearbeiten von'Werkstücken bzw. zum Bearbeiten von Werkstücken unter Verwendung des Prägevorgangs bekannt, wobei sich die Bearbeitung auf eine Anzahl von Werkstücken verschiedener Art, jedoch nicht auf Metallbänder bzw. Preßbänder bezieht, da in der Fachwelt ein Vorurteil gegen die Anwendung der seit langem bekannten Verfahren für die Zwecke der Formgebung oder Profilierung von Metallbändern, insbesondere von Preßbändern, bestand. Darüber hinaus bestand die Schwierigkeit, die geometrisch unbestimmte Form der Preßband-Außenfläche und deren Abmessungen so den Bearbeitungswerkzeugen zuzuordnen, daß für das anspruchsvolle Auge befriedigende Oberflächentexturen ohne Ansätze hergestellt werden konnten. Zum Stand der Technik wird dabei beispielsweise auf die deutschen Patentschriften 1 298 854, 1 440 999, 1 565 468 und 1 961 676, die britischen Patentschriften 856 340 und 885 793, die französische Patentschrift 1 224 109 und schließlich auf die US-Patentschriften 3 042 789 und 3 363 082 verwiesen.A number of methods and devices for electroerosive or electrochemical machining of workpieces or for machining workpieces using the embossing process are now known, the machining relating to a number of workpieces of different types, but not to metal belts or press belts, because in the professional world there was a prejudice against the use of the long-known methods for the purpose of shaping or profiling metal strips, in particular press strips. In addition, there was the difficulty in assigning the geometrically indefinite shape of the press belt outer surface and its dimensions to the processing tools in such a way that satisfactory surface textures could be produced for the discerning eye without any approaches. The prior art is referred to, for example, German Patents 1 298 854, 1 440 999, 1 565 468 and 1 961 676, British Patents 856 340 and 885 793, French Patent 1 224 109 and finally US Pat. 3 042 789 and 3 363 082.

Allgemein bekannt ist es auch, die Mantelfläche von Walzen zum Bedrucken und Prägen von Werkstückoberflächen mit den erwähnten Verfahren zu profilieren. Dabei werden der Umfang des Werkzeuges (oder der Elektrode bei den elektrothermischen und den elektrochemischen Verfahren) und der Umfang der zu profilierenden Walze so bemessen, daß die Rapportlänge auf den Umfang der zu profilierenden Walze in der Regel mehrfach ganzzahlig untergebracht werden kann.It is also generally known to profile the outer surface of rollers for printing and embossing workpiece surfaces using the methods mentioned. The circumference of the tool (or the electrode in the electrothermal and electrochemical processes) and the circumference of the roll to be profiled are dimensioned such that the repeat length on the circumference of the roll to be profiled can usually be accommodated several times as an integer.

Dem Erfinder stellt sich die Aufgabe, diesen bei Druck- und Prägewalzen bekannten Stand der Technik auf die Profilierung von Preßbändern für Doppelbandpressen zu übertragen, deren Länge abweichend von den Verhältnissen bei Walzen ein Mehrfaches üblicher Walzenumfänge beträgt, und darüber hinaus nur mit großem Aufwand bestimmbar ist. Erschwerend muß für die Zeit der Bearbeitung diese Länge beibehalten oder deren Änderung stetig gemessen oder beeinflußt werden.The inventor has the task of transferring this state of the art, which is known in the case of printing and embossing rollers, to the profiling of press belts for double belt presses, the length of which deviates from the ratios of rollers by a multiple of conventional roller circumferences and, moreover, can only be determined with great effort . To make matters worse, this length must be maintained for the time of processing or its change must be measured or influenced continuously.

Die erfinderische Lehre sieht vor, am Umfang des zu bearbeitenden Preßbandes außerhalb des zu profilierenden Teiles der Preßbandober±'äche eine Teilung anzubringen, die mit einer entsprechenden Teilung des Profilierwerkzeuges in Eingriff steht oder die mit elektronischen oder mechanischen Mitteln ausgewertet, eine Synchronisierung von Werkzeug- und Werkstückabwälzung bei der Abbildung des Oberflächenprofils durch elektrothermisches, elektrochemisches oder umformendes Bearbeiten erlaubt. Die Teilung des Preßbandumfanges entspricht einem ganzzahligen Vielfachen der Teilung des Werkzeugumfangs bzw. des auf dem Werkzeugumfang liegenden Rapports, wenn dieser nicht mit dem Werkzeugumfang identisch ist.The inventive teaching provides for the circumference of the to be processed press belt outside the area to be contoured portion of the Preßbandober ± 'äche a pitch to install, which is or with a corresponding division of the profiling tool into engagement the evaluated by electronic or mechanical means, a synchronization of tool and workpiece rolling when imaging the surface profile by electrothermal, electrochemical or forming processing. The division of the press belt circumference corresponds to an integral multiple of the division of the tool circumference or of the repeat lying on the tool circumference, if this is not identical to the tool circumference.

Eine Zwangssynchronisierung zwischen dem Mantel der synchron angetriebenen Umlenktrommel und dem Preßband kann beispielsweise mit Hilfe von Verzahnungen bewerkstelligt werden, wie es in der Offenlegungsschrift 2 737 629 beschrieben ist. Dort ist an den Seitenkanten der Stahlbänder eine Verzahnung angeordnet, die in eine entsprechende Stirnverzahnung eines Hohlzahnrades an der Umlenktrommel eingreift.A forced synchronization between the jacket of the synchronously driven deflection drum and the press belt can be accomplished, for example, with the help of toothing, as described in the published patent application No. 2,737,629. There, a toothing is arranged on the side edges of the steel strips, which engages in a corresponding end toothing of a hollow gear on the deflection drum.

Diese Synchronisierung mit dem Ziel, eine genau ganzzahlige Anzahl von Werkzeugumfängen auf dem Preßbandumfang abzuwälzen, stellt sicher, daß der Anfang der Preßbandstruktur und ihr Ende ohne sichtbare Ansätze ineinander übergehen, wobei auch eventuellen als Schlupf zu bezeichnenden Erscheinungen Rechnung getragen werden muß.This synchronization with the aim of passing an exact whole number of tool circumferences on the circumference of the press belt ensures that the beginning of the press belt structure and its end merge into one another without any visible signs, taking into account any phenomena that may be referred to as slippage.

Zu diesem Zweck wird das Preßband über zwei Umlenktrommein gespannt und über die Kantenverzahnung angetrieben. Das Werkzeug oder die Werkzeugelektrode wird an geeigneter Stelle des auf die Umlenktrommeln gespannten Preßbandes zum Eingriff gebracht und in Abwälzrichtung angetrieben. Werden die beiden Antriebe mechanisch über an sich bekannte Differenzialgetriebe oder elektronisch über ebenso bekannte Lageregelsteuerungen synchronisiert, dann gelingt die ansatzfreie Oberflächenprofilierung von Preßbändern für Doppelbandpressen, wobei eine bis in feinste Details gehende Oberflächenabbildung zwischen Werkzeug und Werkstück erreicht wird.For this purpose, the press belt is tensioned over two deflecting drums and driven via the edge teeth. The tool or the tool electrode is brought into engagement at a suitable point on the press belt tensioned on the deflection drums and driven in the direction of rolling. If the two drives are mechanically synchronized via known differential gears or electronically via also known position control systems, then the surface profiling of press belts for double belt presses can be achieved without any problems, whereby a surface image between tool and workpiece that goes down to the finest details is achieved.

Die beigefügte Zeichnung zeigt schematisch den Abformungsvorgang gemäß dem Verfahren der Erfindung. Über die Trommel 1 ist das zu profilierende Band 2 gespannt, das in Pfeilrichtung 6 angetrieben wird. Mit dem Bezugszeichen 3 ist das Werkzeug bzw. die Werkzeugelektrode bezeichnet, deren Oberfläche 4 auf das Werkstück 2 abgeformt wird. Die Abformung erfolgt dabei im Synchronisationsbereich 5 von Werkstück 2 und Werkzeug 3.The accompanying drawing shows schematically the molding process according to the method of the invention. The belt 2 to be profiled, which is driven in the direction of the arrow 6, is stretched over the drum 1. The reference numeral 3 designates the tool or the tool electrode, the surface 4 of which is molded onto the workpiece 2. The impression is taken in the synchronization area 5 of workpiece 2 and tool 3.

Claims (2)

1. Verfahren zum Profilieren von Metallbändern, insbesondere von Preßbändern in Doppelbandpressen, dadurch gekennzeichnet, daß man am Umfang des Preßbandes außerhalb des zu profilierenden Teiles der Preßbandoberfläche eine Teifung vorsieht, die mit einer entsprechenden Teilung des Profilierwerkzeugs in Eingriff steht und die, mit elektronischen oder mechanischen Mitteln ausgewertet, eine Synchronisierung von Werkzeug- und Werkstückabwälzung bei der Abbildung des Oberflächenprofils durch elektrothermisches, elektrochemisches oder umformendes Bearbeiten erlaubt.1. A method for profiling metal strips, in particular of press belts in double belt presses, characterized in that provision is made on the circumference of the press belt outside the part of the press belt surface to be profiled, which is in engagement with a corresponding division of the profiling tool and which, with electronic or evaluated mechanical means, a synchronization of tool and workpiece rolling when mapping the surface profile by electrothermal, electrochemical or forming processing allowed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet , daß die Teilung des Preßbandumfanges einem ganzzahligen Vielfachen der Teilung des Werkzeugumfanges bzw. des auf dem Werkzeugumfang liegenden Rapports entspricht, wenn dieser nicht mit dem Werkzeugumfang identisch ist, so daß der Anfang der Preßbandstruktur und ihr Ende ohne sichtbare Übergänge ineinander übergehen.2. The method according to claim 1, characterized in that the division of the press belt circumference corresponds to an integer multiple of the division of the tool circumference or of the repeat lying on the tool circumference, if this is not identical to the tool circumference, so that the beginning of the press belt structure and its end merge into each other without visible transitions.
EP81102726A 1980-05-16 1981-04-10 Method of profiling a metal strip, particularly of a band in double band presses Expired EP0040316B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3018759 1980-05-16
DE3018759A DE3018759C2 (en) 1980-05-16 1980-05-16 Process for profiling metal strips

Publications (2)

Publication Number Publication Date
EP0040316A1 true EP0040316A1 (en) 1981-11-25
EP0040316B1 EP0040316B1 (en) 1983-07-27

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US (1) US4598564A (en)
EP (1) EP0040316B1 (en)
DE (1) DE3018759C2 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
AT383974B (en) * 1982-05-04 1987-09-10 Sroubarna Turnov Np METHOD FOR CALIBRATING ELASTIC ELEMENTS, ESPECIALLY SPRING RINGS, AND DEVICE FOR CARRYING OUT THIS METHOD
EP2497582A1 (en) * 2011-03-11 2012-09-12 HILTI Aktiengesellschaft Rolling device for reshaping a strip-shaped metal material

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GB8616240D0 (en) * 1986-07-03 1986-08-13 Renishaw Plc Opto-electronic scale reading apparatus
US7293445B2 (en) * 2003-06-13 2007-11-13 General Motors Corporation Sheet processing apparatus, method of use, and plastically deformed sheet

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FR398808A (en) * 1909-01-25 1909-06-15 Metallurg De Gorcy Soc Method and apparatus for preparing, by rolling, wire for the manufacture of points and nails with ribbed shanks
DE505468C (en) * 1928-07-06 1930-08-19 Eisen Und Stahlwerk Hoesch Akt Rolling mill for rolling out rolling stock by means of wave-shaped rollers
DE507780C (en) * 1927-02-26 1930-09-19 Frank Humphris Process for punching various objects out of a metal sheet
US2472863A (en) * 1945-11-16 1949-06-14 American Can Co Apparatus for perforating metallic strips
DE2737629A1 (en) * 1977-08-20 1979-02-22 Kurt Held CONTINUOUS LAMINATING MACHINE

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US1966006A (en) * 1931-02-19 1934-07-10 Tonsor Ab Band guide for machines for the manufacture of thin razor blades from a continuous band
BE649403A (en) * 1963-06-17
US3250102A (en) * 1963-09-06 1966-05-10 Continental Can Co Rotary scoring device for continuous tube welding machine
US3559568A (en) * 1969-01-14 1971-02-02 Armstrong Cork Co Method of controlling pattern repeat length
US3686917A (en) * 1971-04-06 1972-08-29 Toyoda Chuo Kenkyusho Kk Roll forming apparatus
GB1474505A (en) * 1974-12-16 1977-05-25
US4233833A (en) * 1978-06-05 1980-11-18 United States Gypsum Company Method for stretching sheet metal and structural members formed therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR398808A (en) * 1909-01-25 1909-06-15 Metallurg De Gorcy Soc Method and apparatus for preparing, by rolling, wire for the manufacture of points and nails with ribbed shanks
DE507780C (en) * 1927-02-26 1930-09-19 Frank Humphris Process for punching various objects out of a metal sheet
DE505468C (en) * 1928-07-06 1930-08-19 Eisen Und Stahlwerk Hoesch Akt Rolling mill for rolling out rolling stock by means of wave-shaped rollers
US2472863A (en) * 1945-11-16 1949-06-14 American Can Co Apparatus for perforating metallic strips
DE2737629A1 (en) * 1977-08-20 1979-02-22 Kurt Held CONTINUOUS LAMINATING MACHINE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383974B (en) * 1982-05-04 1987-09-10 Sroubarna Turnov Np METHOD FOR CALIBRATING ELASTIC ELEMENTS, ESPECIALLY SPRING RINGS, AND DEVICE FOR CARRYING OUT THIS METHOD
EP2497582A1 (en) * 2011-03-11 2012-09-12 HILTI Aktiengesellschaft Rolling device for reshaping a strip-shaped metal material
US9308573B2 (en) 2011-03-11 2016-04-12 Hilti Aktiengesellschaft Roller forming device for forming a linear metal material

Also Published As

Publication number Publication date
DE3018759C2 (en) 1982-05-06
US4598564A (en) 1986-07-08
DE3018759A1 (en) 1981-11-19
EP0040316B1 (en) 1983-07-27

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