EP0271481B1 - Method and blank for producing tools - Google Patents

Method and blank for producing tools Download PDF

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Publication number
EP0271481B1
EP0271481B1 EP19870890278 EP87890278A EP0271481B1 EP 0271481 B1 EP0271481 B1 EP 0271481B1 EP 19870890278 EP19870890278 EP 19870890278 EP 87890278 A EP87890278 A EP 87890278A EP 0271481 B1 EP0271481 B1 EP 0271481B1
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EP
European Patent Office
Prior art keywords
cutting edge
bevel
rolling
blank
vane
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Expired - Lifetime
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EP19870890278
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German (de)
French (fr)
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EP0271481A3 (en
EP0271481A2 (en
Inventor
Herbert Ing. Kopf
Franz Ing. Tejral
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Boehler GmbH
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Boehler GmbH
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Publication of EP0271481A3 publication Critical patent/EP0271481A3/en
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    • 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
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/10—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons knives; sickles; scythes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel

Definitions

  • the invention relates to a process for the production of hardened and tempered tools, in particular cutting tools, or blanks produced in accordance with the process for in particular machine knives, from hot-rolled flat steel, with a bevel forming the cutting edge.
  • the purpose of this manufacturing process is to achieve economical manufacturing using a special profile.
  • this layer must at least be ground on the two surfaces that make up the cutting edge.
  • rolled steel bars have a linear structure formed in the rolling direction. If the cutting edge of the knife is now parallel to the rolling direction, these lines, which result from inhomogeneities in the micro-range of the primary material, cause different material properties over the length of the edge and thus a short service life of the cutting tools.
  • the object of the invention was to develop a method for producing hardened or tempered tools, in particular machine knives, with at least one bevel which forms a working edge, in particular a cutting edge, from rolled flat steel, which extends the service life of the tool increased, and also comes cheaper to manufacture.
  • the aim is achieved in that at least one, possibly both, narrow side (s) is formed obliquely on a flat profile by rolling when the roll caliber is overfilled in the last pass, or is formed with a bevel and a a blank, which may be essentially trapezoidal: or a parallelogram-like cross-sectional profile, with at least one rolling lug, which has a homogeneous material structure, and which, due to the material emerging from the caliber gap during rolling, by the acute angle of the side surface and / or the bevel (s) or inclined surface (n) formed, cutting edge area produced and tempered by heat treatment and finished at least in the area of the roller vane by grinding
  • the invention was also based on the object of creating a blank for producing hardened or tempered tools, in particular machine knives, with at least one bevel made of hot-rolled flat steel which forms a working edge, in particular a cutting edge.
  • the cross-sectional profile with a thickness of 5 to 30 mm and a width of 10 to 120 mm in the working edge or cutting edge area has a rolled flag with a thickness of 1 to 3 mm, the thickness and width ratio of which is 1 : 1 to 1: 3, and that to form the working or cutting edge area, the side surface and / or Include chamfer (s) at an angle of 30 ° to 90 °, preferably 45 ° -60 °, the rolled vane representing the area which is intended for finishing by grinding to form the working or cutting edge.
  • a particular advantage is the fact that the fiber path, which is initially longitudinal due to the rolling process, is deflected in the direction of the cutting edge precisely by squeezing the material when the rolling vane is formed, and thus forms a structural improvement precisely at the cutting edge.
  • the surface zone which may have been decarburized in the course of the production process, is removed during grinding on the cutting edge, it is easy to understand that this inventive measure results in a considerable improvement in the service life of a machine knife produced in this way.
  • a trapezoidal finished profile 1 is listed. It has an end face 2 created at right angles to the upper and lower side faces 4, 5.
  • the bevel 3 can be seen on the opposite side of the end face 2.
  • These delimiting surfaces represent the finished product after a cutting edge 7 was formed as a result of the bevel 3.
  • This profile was created from a flat steel, as shown by the dashed outline 6. If the flat steel which has been left oversized and rolled is obliquely rolled on one side to form the cutting edge, it is advantageous to deliberately create a rolled flag 8 in the last pass using an overfilled caliber.
  • the blank therefore has the shape according to the thin line as a finished, trapezoidal profile 9 before the mechanical processing.
  • a parallelogram-like finished profile 10 is created, which consists of the parallel surfaces 13 and the two bevels 11. On the lower left and on the upper right side, there is the cutting edge 7.
  • no flat steel is used as the flat profile 12, but instead a bevel 11 each time the semi-finished product is produced, but rolled excessively for the machining allowance, in such a way that both are creating cutting edges 7 remains a rolled flag 14.
  • the finished blank then has the contour of a parallelogram-like profile 15, again indicated with a thin line. Then it can be separated in the middle for knife production.
  • a bevel profile can also be created, as is used in sheet metal processing.
  • the folded profile 16 as the end product consists of the upper and lower parallel surfaces 19, but the bevel 18 is selected, for example, so that a sharp edge 21 remains in the middle.
  • a profile 22 rolled according to the thin line is produced, in which a rolled lug 20 remains on the intersecting line of the bevels 18.
  • the profile 22 is optionally ground on all sides, but at least on the bevels 18. So that there is now no decarburization at the edge 21, the rolled lug 20 is deliberately left when rolling.
  • the aim is to select the roller flag 8, 14 with a thickness _ width ratio of 1: 1 to 1: 3.
  • the size of the rolled lug 7 depends primarily on the size of the finished profile 1, 10. Experience has shown that the roll tail thickness will start from 1 mm and will extend to a thickness of 3 mm if the profile thickness is between 5 and 30 mm or the profile width between 10 and 120 mm.
  • This manufacturing process results in a material-saving manufacturing process and a long service life expected machine knife

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Metal Rolling (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von vergüteten Werkzeugen, insbesondere Schneidwerkzeugen, bzw. nach dem Verfahren hergestellte Rohlinge für insbesondere Maschinenmesser, aus warmgewalztem Flachstahl, mit einer die Schneidkante bildenden Abschrägung.The invention relates to a process for the production of hardened and tempered tools, in particular cutting tools, or blanks produced in accordance with the process for in particular machine knives, from hot-rolled flat steel, with a bevel forming the cutting edge.

Der Zweck dieses Herstellungsverfahrens besteht darin, eine wirtschaftliche Fertigung durch Einsatz eines Spezialprofiles zu erreichen.The purpose of this manufacturing process is to achieve economical manufacturing using a special profile.

Es ist für die Herstellung von Maschinenmessern bekannt, einen Flachstahl aus geeignetem Material zu verwenden, der im Profil rechteckig ist und durch Warmwalzen erstellt wird. Solche als Stangenmaterial erstellten Halbzeuge werden auf die gewünschte Länge zugeschnitten und allseitig mechanisch bearbeitet. An jener Seite, an der die Schneide vorgesehen ist, muß nun eine Abschrägung vorgenommen werden, damit eine Schneidkante gebildet wird. Da diese Schneidkante möglichst scharfkantig ausgebildet sein soll, ergibt sich die Notwendigkeit, die Abschrägung nach dem Härten bzw. Vergüten zu schleifen.It is known for the manufacture of machine knives to use a flat steel made of a suitable material, which is rectangular in profile and is produced by hot rolling. Such semi-finished products created as bar material are cut to the desired length and mechanically processed on all sides. On the side on which the cutting edge is provided, a bevel must now be made so that a cutting edge is formed. Since this cutting edge should be as sharp as possible, there is a need to grind the bevel after hardening or tempering.

Der Nachteil besteht nun darin, daß beim Schleifprozeß gerade die Schneidkante eine geringe Wärmeabfuhr erfährt und so tritt an dieser Stelle eine Temperaturerhöhung ein, wodurch das Vergütungsgefüge nachteilig beeinflußt und die Härte vermindert wird.The disadvantage now lies in the fact that during the grinding process the cutting edge experiences a small amount of heat dissipation and so a temperature increase occurs at this point, whereby the structure of the coating is adversely affected and the hardness is reduced.

Weist der Flachstahl herstellungsbedingt eine entkohlte Oberflächenzone auf oder entsteht beim Härten eines bereits eine Abschrägung aufweisenden Messerrohlings eine oberflächliche Entkohlung, so muß diese Schicht zumindestens an den zwei Flächen, welche die Schneidkante ergeben, abgeschliffen werden.If the flat steel has a decarburized surface zone as a result of production or if surface hardening of a knife blank which already has a bevel occurs, this layer must at least be ground on the two surfaces that make up the cutting edge.

Weiters weist gewalzter Stabstahl eine in Walzrichtung ausgebildete zeilige Struktur auf. Ist nun die Schneidkante des Messers parallel zur Walzrichtung ausgebildet, so bewirken diese Zeilen, die durch Inhomogenitäten im Mikrobereich des Vormaterials entstehen, unterschiedliche Werkstoffeigenschaften über die Länge der Kante und somit geringe Standzeit der Schneidwerkzeuge.Furthermore, rolled steel bars have a linear structure formed in the rolling direction. If the cutting edge of the knife is now parallel to the rolling direction, these lines, which result from inhomogeneities in the micro-range of the primary material, cause different material properties over the length of the edge and thus a short service life of the cutting tools.

Aus der DE-B-1 143 776 ist ein Verfahren nach dem Oberbegriff des Anspruchs 1 und eine Walzvorrichtung zum Hertellen von Messern mit geschliffener Schneide, insbesondere für Profilschneidgeräte, zum Nacharbeiten von vulkanisierten Reifen bekannt geworden. Dabei ist vorgesehen, an einem bandförmigen Messerstahl mit rechteckigem Querschnitt mittels Kaltverformung, die zu einer Verfestigung des Stahles in diesem Bereich führt, durch Walzen eine Kante der Messerschneide vor dem Schleifen der anderen abzuschrägen.From DE-B-1 143 776 a method according to the preamble of claim 1 and a rolling device for producing knives with a ground cutting edge, in particular for tread cutters, for reworking vulcanized tires has become known. It is envisaged to bevel on a band-shaped knife steel with a rectangular cross section by means of cold forming, which leads to a hardening of the steel in this area, by rolling one edge of the knife edge before sharpening the other.

Ausgehend von diesem Stand der Technik lag der Erfindung die Aufgabe zugrunde, ein Verfahren zur Herstellung von gehärteten bzw. vergüteten Werkzeugen, insbesondere Maschinenmesser, mit mindestens einer eine Arbeitskante, insbesondere eine Schneidkante bildenden Abschrägung, aus walmgewalztem Flachstahl zu entwickeln, das die Standzeit des Werkzeuges erhöht, und außerdem noch billiger in der Herstellung kommt.On the basis of this prior art, the object of the invention was to develop a method for producing hardened or tempered tools, in particular machine knives, with at least one bevel which forms a working edge, in particular a cutting edge, from rolled flat steel, which extends the service life of the tool increased, and also comes cheaper to manufacture.

Erfindungsgemäß wird das Ziel dadurch erreicht, daß an einem Flachprofil zumindest eine, gegebenenfalls beide Schmalseite(n) durch Walzen bei Überfüllung des Walzenkalibers im letzten Stich, schräg geformt bzw. mit einer Abschrägung gebildet wird (werden) und ein, ein gegebenenfalls im wesentlichen trapez: oder parallelogrammartiges Querschnittsprofil aufweisender Rohling, mit zumindest einer, eine homogene Materialstruktur aufweisende Walzfahne die durch Austreten des Materials aus dem Kaliberspalt beim Walzen im, durch den spitzen Winkel der Seitenfläche und/oder der Abschrägung(en) bzw. Schrägfläche(n) gebildeten, Schneidkantenbereich hergestellt und durch eine Wärmebehandlung vergütet und mindestens im Bereich der Walzfahne durch Schleifen endbearbeitet wirdAccording to the invention, the aim is achieved in that at least one, possibly both, narrow side (s) is formed obliquely on a flat profile by rolling when the roll caliber is overfilled in the last pass, or is formed with a bevel and a a blank, which may be essentially trapezoidal: or a parallelogram-like cross-sectional profile, with at least one rolling lug, which has a homogeneous material structure, and which, due to the material emerging from the caliber gap during rolling, by the acute angle of the side surface and / or the bevel (s) or inclined surface (n) formed, cutting edge area produced and tempered by heat treatment and finished at least in the area of the roller vane by grinding

Zunächst wird dadurch erreicht, daß sich eine Materialersparnis ergibt, weil die Abschrägung nun nicht mehr mechanisch gefertigt werden muß. Das Wesentliche ist aber die Erhöhung der Standzeit der Schneidkante, weil im Breich der Walzfahne eine verbesserte Materialstruktur vorliegt und die entkohlte Oberflächenzone im Zuge des Schleifens ohnehin entfernt wird. Die Folge ist ein besser schneidendes Maschinenmesser mit längerer Lebensdauer.First of all, this results in a material saving because the bevel no longer has to be produced mechanically. The main thing is to increase the service life of the cutting edge, because there is an improved material structure in the area of the rolled vane and the decarburized surface zone is removed in the course of grinding anyway. The result is a better-cutting machine knife with a longer service life.

Weiters lag der Erfindung die Aufgabe zugrunde, einen Rohling zur Herstellung von behärteten bzw. vergüteten Werkzeugen, insbesondere Maschinenmesser, mit mindestens einer eine Arbeitskante, insbesondere eine Schneidkante bildenden Abschrägung aus warmgewalztem Flachstahl zu schaffen.The invention was also based on the object of creating a blank for producing hardened or tempered tools, in particular machine knives, with at least one bevel made of hot-rolled flat steel which forms a working edge, in particular a cutting edge.

Diese Aufgabe wird dadurch gelöst, daß das Querschnittsprofil mit einer Dicke von 5 bis 30 mm und einer Breite von 10 bis 120 mm im Arbeitskanten- bzw. Schneidkantenbereich eine Walzfahne mit einer Dicke von 1 bis 3 mm aufweist, wobei deren Dicken- und Breitenverhältnis 1: 1 bis 1: 3 beträgt, und daß zur Bildung des Arbeits- bzw. Schnittkantenbereiches die Seitenfläche und/oder die Abschrägung(en) einen Winkel von 30° bis 90°, vorzugsweise von 45°-60°, einschließen, wobei die Walzfahne jenen Bereich darstellt, der für die Endbearbeitung durch Schleifen zur Bildung der Arbeits- bzw Schnittkante vorgesehen ist.This object is achieved in that the cross-sectional profile with a thickness of 5 to 30 mm and a width of 10 to 120 mm in the working edge or cutting edge area has a rolled flag with a thickness of 1 to 3 mm, the thickness and width ratio of which is 1 : 1 to 1: 3, and that to form the working or cutting edge area, the side surface and / or Include chamfer (s) at an angle of 30 ° to 90 °, preferably 45 ° -60 °, the rolled vane representing the area which is intended for finishing by grinding to form the working or cutting edge.

Als besonderer Vorteil ist aber die Tatsache anzusehen, daß der zunächst durch den Walzvorgang längsgerichtete Faserverlauf gerade durch das Zusammenquetschen des Materials bei der Bildung der Walzfahne eine Umlenkung in Richtung der Schneidkante erfährt und somit eine Strukturverbesserung gerade an der Schneidkante bildet. Nachdem nun beim Schleifen an der Schneide die Oberflächenzone, die gegebenenfalls im Zuge des Erzeugungsprozesses entkohlt wurde, abgetragen wird, ist es leicht verständlich, daß durch diese erfindungsgemäße Maßnahme sich eine erhebliche Verbesserung der Standzeit eines solcherart hergestellten Maschinenmessers ergibt.However, a particular advantage is the fact that the fiber path, which is initially longitudinal due to the rolling process, is deflected in the direction of the cutting edge precisely by squeezing the material when the rolling vane is formed, and thus forms a structural improvement precisely at the cutting edge. Now that the surface zone, which may have been decarburized in the course of the production process, is removed during grinding on the cutting edge, it is easy to understand that this inventive measure results in a considerable improvement in the service life of a machine knife produced in this way.

Anhand eines Ausführungsbeispieles sei die Erfindung näher erläutert. Es zeigen

  • Fig. 1: Profil eines Schneidmessers
  • Fig. 2: Profil mit beidseitiger Schneide
  • Fig. 3: Abkantprofil
On the basis of an exemplary embodiment, the invention is closer explained. Show it
  • Fig. 1: Profile of a cutting knife
  • Fig. 2: Profile with double-sided cutting edge
  • Fig. 3: folding profile

Wie aus Fig. 1 ersichtlich, ist ein trapezförmiges Fertigprofil 1 aufgeführt. Es weist eine im rechten Winkel erstellte Stirnfläche 2 zu den oberen und unteren Seitenflächen 4, 5 auf. An der gegenüberliegenden Seite der Stirnfläche 2 ist die Abschrägung 3 zu ersehen. Diese begrenzenden Flächen stellen das fertige Produkt dar, nach.dem infolge der Abschrägung 3 eine Schneidkante 7 gebildet wurde. Dieses Profil wurde aus einem Flachstahl erstellt, wie die strichliert angedeutete Kontur 6 zeigt. Wird nun der mit Übermaß belassene und gewalzte Flachstahl an einer Seite zur Bildung der Schneide schräg gewalzt, so ist es vorteilhaft, durch ein überfülltes Kaliber bewußt eine Walzfahne 8 im letzten Stich zu erstellen. Der Rohling hat deshalb vor der mechanischen Bearbeitung die Form gemäß der dünnen Linie als fertiges, trapezartiges Profil 9.1, a trapezoidal finished profile 1 is listed. It has an end face 2 created at right angles to the upper and lower side faces 4, 5. The bevel 3 can be seen on the opposite side of the end face 2. These delimiting surfaces represent the finished product after a cutting edge 7 was formed as a result of the bevel 3. This profile was created from a flat steel, as shown by the dashed outline 6. If the flat steel which has been left oversized and rolled is obliquely rolled on one side to form the cutting edge, it is advantageous to deliberately create a rolled flag 8 in the last pass using an overfilled caliber. The blank therefore has the shape according to the thin line as a finished, trapezoidal profile 9 before the mechanical processing.

Die Fig. 2 zeigt nun eine weitere vorteilhafte Variante der Herstellung eines Maschinenmessers. Es wird ein parallelogrammartiges Fertigprofil 10 erstellt, das aus den parallelen Flächen 13 und den beiden Abschrägungen 11 besteht. An der linken unteren und an der rechten oberen Seite ergibt sich die Schneidkante 7. Auch hier wird kein Flachstahl als Flachprofil 12, sondern bei der Erstellung des Halbzeuges je eine Abschrägung 11, jedoch mit Übermaß für die Bearbeitungszugabe gewalzt, derart, daß an beiden zu erstellenden Schneidkanten 7 eine Walzfahne 14 verbleibt. Der fertige Rohling weist dann die wieder mit einer dünnen Linie angegebene Kontur eines parallelogrammartigen Profils 15 auf. Hernach kann es zur Messerherstellung in Mitte getrennt werden.2 now shows a further advantageous variant of the manufacture of a machine knife. A parallelogram-like finished profile 10 is created, which consists of the parallel surfaces 13 and the two bevels 11. On the lower left and on the upper right side, there is the cutting edge 7. Here, too, no flat steel is used as the flat profile 12, but instead a bevel 11 each time the semi-finished product is produced, but rolled excessively for the machining allowance, in such a way that both are creating cutting edges 7 remains a rolled flag 14. The finished blank then has the contour of a parallelogram-like profile 15, again indicated with a thin line. Then it can be separated in the middle for knife production.

Schließlich sei noch ein weiteres Ausführungsbeispiel gemäß Fig. 3 genannt. Mit dem vorhin genannten Herstellungsverfahren kann auch ein Abkantprofil erstellt werden, wie dies bei der Blechverarbeitung Anwendung findet. Das Abkantprofil 16 als Endprodukt besteht aus den oberen und unteren parallelen Flächen 19, jedoch ist die Abschrägung 18 beispielsweise so gewählt, daß eine scharfe Kante 21 in Mitte verbleibt. Auch hier wird anstelle dEr Flachstahlkontur 17 ein gemäß der dünnen Linie gewalztes Profil 22 gefertigt, bei dem an der sich schneidenden Linie der Abschrägungen 18 eine Walzfahne 20 verbleibt. Nachdem der Abkantrohling in der Weise gefertigt und gehärtet wurde, wird das Profil 22 gegebenenfalls allseitig, aber zumindest an den Abschrägungen 18 geschliffen. Damit nun keine Entkohlung an der Kante 21 vorliegt, beläßt man bewußt beim Walzen die Walzfahne 20.Finally, a further exemplary embodiment according to FIG. 3 is mentioned. With the aforementioned manufacturing process, a bevel profile can also be created, as is used in sheet metal processing. The folded profile 16 as the end product consists of the upper and lower parallel surfaces 19, but the bevel 18 is selected, for example, so that a sharp edge 21 remains in the middle. Here too, instead of the flat steel contour 17, a profile 22 rolled according to the thin line is produced, in which a rolled lug 20 remains on the intersecting line of the bevels 18. After the bent blank has been manufactured and hardened in this way, the profile 22 is optionally ground on all sides, but at least on the bevels 18. So that there is now no decarburization at the edge 21, the rolled lug 20 is deliberately left when rolling.

In beiden Fällen wird angestrebt, die Walzfahne 8, 14 mit einem Dicken _ Breitenverhältnis von 1: 1 bis 1: 3 zu wählen. Die Größe der Walzfahne 7 hängt in erster Linie von der Größenordnung des Fertigprofils 1, 10 ab. Wie die Erfahrung zeigt, wird die Walzfahnendicke von 1 mm beginnend, sich bis zu einer Stärke von 3 mm erstrecken, wenn sich die Profildicke zwischen 5 bis 30 mm bzw. die Profilbreite zwischen 10 bis 120 mm ergibt.In both cases, the aim is to select the roller flag 8, 14 with a thickness _ width ratio of 1: 1 to 1: 3. The size of the rolled lug 7 depends primarily on the size of the finished profile 1, 10. Experience has shown that the roll tail thickness will start from 1 mm and will extend to a thickness of 3 mm if the profile thickness is between 5 and 30 mm or the profile width between 10 and 120 mm.

Aus diesem Herstellverfahren ergibt sich ein materialsparend in der Fertigung und mit einer hohen Standzeit zu erwartendes MaschinenmesserThis manufacturing process results in a material-saving manufacturing process and a long service life expected machine knife

Darüberhinaus ergibt sich selbstverständlich die Möglichkeit, dieses Herstellverfahren auch auf Rundmesser auszudehnen. Es braucht lediglich ein der Walzfahne ähnlicher Vorsprung belassen werden, damit beim Schleifvorgang an der Schneide keine Entkohlung und damit Härteverminderung eintritt.In addition, there is of course the possibility of extending this manufacturing process to round knives. All that is required is a protrusion similar to the rolled vane, so that no decarburization and thus a reduction in hardness occurs on the cutting edge during the grinding process.

Claims (3)

1. A method of producing hardened or tempered tools, in particular machine knives, with at least one bevel forming a cutting edge and made of hot-rolled flat steel, characterised in that, on a flat profile (6, 12, 17), at least one, if applicable both, narrow side(s) is (are) formed so as to be bevelled or with a bevel edge (3, 11, 18) by rolling _ when the roll groove is overfilled in the last pass _ and a blank having an if necessary substantially trapezium-like or parallelogram-like cross-sectional profile (9, 15, 22), with at least one rolling vane (8, 14, 20), having a homogeneous material structure, which vane is produced when the material emerges from the groove gap during rolling in the cutting edge region (7, 21), formed by the pointed angle of the side face (5, 13, 19) and/or of the bevel(s) (3, 11, 18) or the bevelled face(s), and is tempered by heat-treatment and finished by grinding, at least in the region of the rolling vane (8, 14, 20).
2. A blank for producing hardened or tempered tools, in particular machine knives, with at least one bevel made of hot-rolled flat steel and forming a working edge, in particular a cutting edge, characterised in that the cross-sectional profile (9, 15, 22) with a thickness of 5 to 30 mm and a breadth of 10 to 120 mm in the working edge region or cutting edge region (7, 21) has a rolling vane (8, 14, 20) with a thickness of 1 to 3 mm, the thickness-breadth ratio thereof being 1: 1 to 1: 3.
3. A blank according to claim 2, characterised in that the side face (5, 13) and/or the bevel(s) (3, 11, 18) form an angle of 30° to 90°, preferably 45° to 60°, for forming the working or cutting edge region (7, 21), where the rolling vane (8, 14, 20) represents that region which is provided for the finishing by grinding in order to form the working or cutting edge.
EP19870890278 1986-12-12 1987-12-04 Method and blank for producing tools Expired - Lifetime EP0271481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0330086A AT390221B (en) 1986-12-12 1986-12-12 METHOD FOR PRODUCING CUTTING TOOLS
AT3300/86 1986-12-12

Publications (3)

Publication Number Publication Date
EP0271481A2 EP0271481A2 (en) 1988-06-15
EP0271481A3 EP0271481A3 (en) 1988-10-12
EP0271481B1 true EP0271481B1 (en) 1991-03-27

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EP19870890278 Expired - Lifetime EP0271481B1 (en) 1986-12-12 1987-12-04 Method and blank for producing tools

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AT (1) AT390221B (en)
DE (1) DE3768926D1 (en)

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AT396954B (en) * 1991-11-18 1994-01-25 Haboeck Herwig INSULATION PLATE FOR DRIVING INTO THE WALL AND METHOD AND DEVICE FOR THEIR PRODUCTION
AT504450B1 (en) * 2006-11-13 2010-09-15 Boehler Ybbstal Profil Gmbh ONE-WAY CUTTING KNIFE FOR CUTTING NATURAL OR PLASTICS AND METHOD FOR THE PRODUCTION THEREOF
AT507892B1 (en) * 2009-11-27 2010-09-15 Boehler Ybbstal Profil Gmbh PROCESS FOR PRODUCING TURNING EQUIPMENT

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Publication number Priority date Publication date Assignee Title
DE632428C (en) * 1936-07-08 Franz Hendrichs Process for the production of blades, knives and similar objects
DE580579C (en) * 1930-12-21 1933-07-13 Tonsor Ab Process for making the cutting edges of thin razor blades
DE1143776B (en) * 1959-04-22 1963-02-21 Herbert Ruff K G Method and rolling device for the production of knives with ground cutting edges, especially for profile cutting devices for reworking vulcanized tires
DE1802322A1 (en) * 1968-10-17 1970-07-23 Stumpp & Schuele Kg Circular saw manufacturing procedure
DE3300105A1 (en) * 1983-01-04 1984-07-12 Barke GmbH, 6384 Schmitten Method of producing slitting or parting cutters, in particular for the production of wood wool

Also Published As

Publication number Publication date
EP0271481A3 (en) 1988-10-12
AT390221B (en) 1990-04-10
EP0271481A2 (en) 1988-06-15
DE3768926D1 (en) 1991-05-02
ATA330086A (en) 1989-09-15

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