EP0234009B1 - Method of manufacturing a cutting and indenting tool - Google Patents

Method of manufacturing a cutting and indenting tool Download PDF

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Publication number
EP0234009B1
EP0234009B1 EP86116555A EP86116555A EP0234009B1 EP 0234009 B1 EP0234009 B1 EP 0234009B1 EP 86116555 A EP86116555 A EP 86116555A EP 86116555 A EP86116555 A EP 86116555A EP 0234009 B1 EP0234009 B1 EP 0234009B1
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EP
European Patent Office
Prior art keywords
bevel
blade
cutting
chamfer
process according
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.)
Expired
Application number
EP86116555A
Other languages
German (de)
French (fr)
Other versions
EP0234009A1 (en
EP0234009B2 (en
Inventor
Horst-Peter Kämmerling-Essmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ESSMANN AND SCHAEFER GmbH and Co KG
Original Assignee
ESSMANN AND SCHAEFER GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by ESSMANN AND SCHAEFER GmbH and Co KG filed Critical ESSMANN AND SCHAEFER GmbH and Co KG
Priority to AT86116555T priority Critical patent/ATE41891T1/en
Publication of EP0234009A1 publication Critical patent/EP0234009A1/en
Publication of EP0234009B1 publication Critical patent/EP0234009B1/en
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Publication of EP0234009B2 publication Critical patent/EP0234009B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4436—Materials or surface treatments therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4472—Cutting edge section features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/02—Case hardening
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9295—Work supported tool [e.g., clicker die]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9454—Reciprocable type

Definitions

  • the present invention relates to a method for producing a cutting and scoring tool from a steel blade, a chamfer being formed on a longitudinal side of the blade by scraping.
  • Such cutting and scoring tools are used in the paper processing and cardboard industry.
  • Cutting and scoring tools which have either a ground bevel or a scraped bevel.
  • the ground bevel has minimal hollow grinding, which results in excellent sharpness, so that a low punching pressure is required.
  • the dimensional accuracy of such a chamfer is not satisfactory for all purposes. Due to their production in the drawing process, scraped bevels have very good dimensional stability, so that they can be used with high demands on dimensional accuracy.
  • the chamfer is slightly convex, the sharpness of this chamfer is low and it does not have a cutting, but rather a pressing effect on the material, so that higher punching pressures are required.
  • FR-A 1 483 301 describes a punch knife whose cutting edge is formed solely by grinding.
  • DE-A 2 304 237 deals with a cutting knife which also has ground cutting edges.
  • DE-A 3 101 988 also relates to a knife, the blade of which is provided with a ground cutting edge.
  • the present invention is based on the object, starting from the prior art described at the outset, of specifying a method for producing a cutting and scoring tool with which the advantages of the scraped and ground bevel can be connected to one another.
  • the blade is hardened in one area of the chamfer and in that a fine grinding is carried out in the same area starting from the chamfer tip.
  • the invention is based on the knowledge that the fine grinding not only improves the function of the cutting tool due to the change in shape associated with it, but that the precision grinding does not impair the dimensional accuracy of the scraped chamfer on the one hand and the top layer of the chamfer on the other a thickness is removed which corresponds to the thickness of the soft outer skin, in which the desired hardness is not present.
  • the fine grinding according to the invention not only maintains the dimensional accuracy of the scraped chamfer, but also realizes the cutting effect of a ground tool, although there is also an increased service life.
  • the single figure shows a cross section through a cutting and scoring tool produced by the method according to the invention, which consists of a blade 1 and has a chamfer 2 on a longitudinal edge, a double-sided chamfer 2 being present in the example shown.
  • the chamfer 2 is produced by pulling a flat material made of spring steel with a thickness of 0.4 to 2 mm in a hard metal drawing die, so that the one or two-sided chamfer 2 is produced as a result. This is called a so-called scraped bevel.
  • This chamfer 2 is now produced with a certain oversize, namely with an oversize of 2/100 to 4/100 mm.
  • This oversized, scraped chamfer 2 is then hardened according to the invention in a region 4, preferably induction hardened, with a penetration depth of 3/10 to 5/10 mm measured from the tip 3 of the chamfer 2.
  • the hardening takes place to a hardness of 66 HRc.
  • tempering takes place in the same area 4, to a final tempering hardness of 57 to 59 HRc. It is also provided that the bevel 2 is given a finishing touch 5.
  • This fine sanding 5 is carried out at a bevel angle a of approximately 45 ° -60 ° in such a way that the excess existing after scraping is removed. As a result, the softer outer skin of the hardened and tempered chamfer 2 is removed at the same time.
  • This fine sanding which is advantageously carried out with an added grinding wheel, does not impair the dimensional accuracy of the scraped bevel, and the fine sanding also prevents scoring in the bevel surface.
  • the cutting and scoring tool produced by the method according to the invention can be designed with a one-sided chamfer, with a double-sided chamfer as shown, with one-sided double grinding or with four-grinding.
  • the tool according to the invention has excellent dimensional stability, which results in very short dressing times in the tool.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Milling Processes (AREA)

Abstract

A cutting and scoring line consisting of a blade (1) of steel with a cut bevel (2) formed on one longitudinal side of the blade, and the blade (1) is hardened in the area of the bevel (2) and the bevel has a fine grind (5) in the hardened area (4) starting from the tip (3) of the bevel.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Herstellen eines Schneid- und Ritzwerkzeuges aus einer Klinge aus Stahl, wobei an einer Klingenlängsseite durch Schaben eine Fase gebildet wird.The present invention relates to a method for producing a cutting and scoring tool from a steel blade, a chamfer being formed on a longitudinal side of the blade by scraping.

Derartige Schneid- und Ritzwerkzeuge werden in der Papierverarbeitungs- und Kartonagenindustrie verwendet.Such cutting and scoring tools are used in the paper processing and cardboard industry.

Es sind Schneid- und Ritzwerkzeuge bekannt, die entweder eine geschliffene Fase oder eine geschabte Fase besitzen. Die geschliffene Fase weist einen minimalen Hohlschliff auf, wodurch sich eine hervorragende Schärfe ergibt, so daß ein geringer Stanzdruck erforderlich ist. Jedoch ist die Maßhaltigkeit einer derartigen Fase nicht für alle Zwecke zufriedenstellend. Geschabte Fasen besitzen aufgrund ihrer Herstellung im Ziehverfahren eine sehr gute Maßhaltigkeit, so daß sie bei hohen Ansprüchen an die Maßgenauigkeit eingesetzt werden. Da die Fase aber schwach konvex ist, ist die Schärfe dieser Fase gering und sie wirkt nicht schneidend, sondern drückend auf das Material ein, so daß höhere Stanzdrücke erforderlich sind.Cutting and scoring tools are known which have either a ground bevel or a scraped bevel. The ground bevel has minimal hollow grinding, which results in excellent sharpness, so that a low punching pressure is required. However, the dimensional accuracy of such a chamfer is not satisfactory for all purposes. Due to their production in the drawing process, scraped bevels have very good dimensional stability, so that they can be used with high demands on dimensional accuracy. However, since the chamfer is slightly convex, the sharpness of this chamfer is low and it does not have a cutting, but rather a pressing effect on the material, so that higher punching pressures are required.

Die FR-A 1 483 301 beschreibt ein Stanzmesser, dessen Schneide allein durch Schleifen gebildet wird.FR-A 1 483 301 describes a punch knife whose cutting edge is formed solely by grinding.

Die DE-A 2 304 237 behandelt ein Schneidmesser, das ebenfalls geschliffene Schneiden besitzt.DE-A 2 304 237 deals with a cutting knife which also has ground cutting edges.

Schließlich betrifft auch die DE-A 3 101 988 ein Messer, dessen Klinge mit einer geschliffenen Schneide versehen ist.Finally, DE-A 3 101 988 also relates to a knife, the blade of which is provided with a ground cutting edge.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ausgehend von dem eingangs beschriebenen Stand der Technik ein Verfahren zum Herstellen eines Schneid- und Ritzwerkzeuges anzugeben, mit dem die Vorteile der geschabten und geschliffenen Fase miteinander verbunden werden können.The present invention is based on the object, starting from the prior art described at the outset, of specifying a method for producing a cutting and scoring tool with which the advantages of the scraped and ground bevel can be connected to one another.

Erfindungsgemäß wird dies dadurch erreicht, daß die Klinge in einem Bereich der Fase gehärtet wird, und daß in demselben Bereich ausgehend von der Fasenspitze ein Feinschliff durchgeführt wird. Die Erfindung basiert dabei auf der Erkenntnis, daß durch den Feinschliff nicht nur aufgrund der damit verbundenen veränderten Formgebung eine verbesserte Funktion des Schneidwerkzeuges erreicht wird, sondern daß durch den Feinschliff einerseits die Maßhaltigkeit der geschabten Fase nicht beeinträchtigt wird und andererseits die oberste Schicht der Fase in einer Stärke abgetragen wird, die der Stärke der weichen Außenhaut entspricht, in der nicht die volle gewünschte Härte vorhanden ist.This is achieved according to the invention in that the blade is hardened in one area of the chamfer and in that a fine grinding is carried out in the same area starting from the chamfer tip. The invention is based on the knowledge that the fine grinding not only improves the function of the cutting tool due to the change in shape associated with it, but that the precision grinding does not impair the dimensional accuracy of the scraped chamfer on the one hand and the top layer of the chamfer on the other a thickness is removed which corresponds to the thickness of the soft outer skin, in which the desired hardness is not present.

Erfindungsgemäß wird demnach eine zusätzliche Wirkung erzielt, denn durch den erfindungsgemäßen Feinschliff wird nicht nur die Maßhaltigkeit der geschabten Fase beibehalten, sondern auch die Schneidwirkung eines geschliffenen Werkzeuges verwirklicht, wobei jedoch zusätzlich eine erhöhte Standzeit gegeben ist.Accordingly, an additional effect is achieved according to the invention, because the fine grinding according to the invention not only maintains the dimensional accuracy of the scraped chamfer, but also realizes the cutting effect of a ground tool, although there is also an increased service life.

Anhand des in der beiliegenden Zeichnung dargestellten Ausführungsbeispiels wird die Erfindung näher erläutert.The invention is explained in more detail with reference to the exemplary embodiment shown in the accompanying drawing.

In der einzigen Figur ist ein Querschnitt durch ein durch das erfindungsgemäße Verfahren hergestelltes Schneid- und Ritzwerkzeug dargestellt, das aus einer Klinge 1 besteht und an einem Längsrand eine Fase 2 aufweist, wobei im dargestellten Beispiel eine doppelseitige Fase 2 vorhanden ist. Die Fase 2 wird dadurch hergestellt, daß ein Flachmaterial aus Federbandstahl mit einer Dicke von 0,4 bis 2 mm in einem Hartmetallziehstein gezogen wird, so daß hierdurch die ein- oder zweiseitige Fase 2 erzeugt wird. Hierbei spricht man von einer sogenannten geschabten Fase.The single figure shows a cross section through a cutting and scoring tool produced by the method according to the invention, which consists of a blade 1 and has a chamfer 2 on a longitudinal edge, a double-sided chamfer 2 being present in the example shown. The chamfer 2 is produced by pulling a flat material made of spring steel with a thickness of 0.4 to 2 mm in a hard metal drawing die, so that the one or two-sided chamfer 2 is produced as a result. This is called a so-called scraped bevel.

Diese Fase 2 wird nun mit einem bestimmten Übermaß hergestellt, und zwar mit einem Übermaß von 2/100 bis 4/100 mm. Diese mit Übermaß hergestellte, geschabte Fase 2 wird nun erfindungsgemäß in einem Bereich 4 gehärtet, und zwar vorzugsweise induktionsgehärtet mit einer Eindringtiefe von 3/10 bis 5/10 mm von der Spitze 3 der Fase 2 aus gemessen. Die Härtung erfolgt dabei auf ein Härte von 66 HRc. Nach dem Härten erfolgt ein Anlassen im gleichen Bereich 4, und zwar auf eine Endanlaßhärte von 57 bis 59 HRc. Weiterhin ist vorgesehen, daß die Fase 2 einen Feinschliff 5 erhält. Dieser Feinschliff 5 wird derart unter einem Anschliffwinkel a von ca. 45°-60° ausgeführt, daß das nach dem Schaben vorhandene Übermaß abgetragen wird. Hierdurch wird gleichzeitig die weichere Außenhaut der gehärteten und angelassenen Fase 2 weggenommen. Durch diesen Feinschliff, der vorteilhafterweise mit einer zugesetzten Schleifscheibe durchgeführt wird, wird nicht die Maßhaltigkeit der geschabten Fase beeinträchtigt, zudem wird durch den Feinschliff verhindert, daß Riefen in der Fasenoberfläche auftreten.This chamfer 2 is now produced with a certain oversize, namely with an oversize of 2/100 to 4/100 mm. This oversized, scraped chamfer 2 is then hardened according to the invention in a region 4, preferably induction hardened, with a penetration depth of 3/10 to 5/10 mm measured from the tip 3 of the chamfer 2. The hardening takes place to a hardness of 66 HRc. After hardening, tempering takes place in the same area 4, to a final tempering hardness of 57 to 59 HRc. It is also provided that the bevel 2 is given a finishing touch 5. This fine sanding 5 is carried out at a bevel angle a of approximately 45 ° -60 ° in such a way that the excess existing after scraping is removed. As a result, the softer outer skin of the hardened and tempered chamfer 2 is removed at the same time. This fine sanding, which is advantageously carried out with an added grinding wheel, does not impair the dimensional accuracy of the scraped bevel, and the fine sanding also prevents scoring in the bevel surface.

Das durch das erfindungsgemäße Verfahren hergestellte Schneid- und Ritzwerkzeug kann mit einer einseitigen Fase, mit einer doppelseitigen Fase wie dargestellt, mit einseitigem Doppelschliff oder mit Viererschliff ausgebildet sein.The cutting and scoring tool produced by the method according to the invention can be designed with a one-sided chamfer, with a double-sided chamfer as shown, with one-sided double grinding or with four-grinding.

Es zeichnet sich durch eine erhöhte Standzeit gegenüber den bekannten Schneid- und Ritzwerkzeugen aus sowie dadurch, daß der bei den bekannten Werkzeugen auftretende Fusseleffekt vermieden wird. Darüber hinaus besitzt das erfindungsgemäße Werkzeug eine ausgezeichnete Maßhaltigkeit, wodurch sich sehr kurze Zurichtzeiten im Werkzeug ergeben.It is characterized by an increased service life compared to the known cutting and scoring tools and by the fact that the lint effect occurring in the known tools is avoided. In addition, the tool according to the invention has excellent dimensional stability, which results in very short dressing times in the tool.

Claims (7)

1. Process for the production of a cutting and scoring tool comprising a blade (1) of steel, a bevel (2) being formed on one longitudinal side of the blade by scraping, characterized in that the blade (1) is hardened in a region (4) of the bevel (2), and in that a fine grinding (5) is carried out in the same region (4), starting from the bevel tip (3).
2. Process according to claim 1, characterized in that the blade (1) is hardened in such a way that the region (4) is about 3/10 to 5/10 mm, measured from the bevel tip (3).
3. Process according to claim 1 or 2, characterized in that the blade (1) is hardened in the region (4) to a degree of hardness of about 66 HRc.
4. Process according to one or more of claims 1 to 3, characterized in that the bevel (2) is tempered in the region (4), in particular to a final hardness of about 57 to 59 HRc
5. Process according to one or more of claims 1 to 4, characterized in that the abrasion of the fine grinding (5) is 2/100 to 4/100 mm.
6. Process according to one or more of claims 1 to 5, characterized in that the cutting angle (a) of the fine grinding (5) is about 45° to 60°.
7. Process according to one or more of claims 1 to 6, characterized in that a blade (1) of spring band steel of a thickness of 0,4 to 2 mm is used.
EP86116555A 1986-02-27 1986-11-28 Method of manufacturing a cutting and indenting tool Expired - Lifetime EP0234009B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116555T ATE41891T1 (en) 1986-02-27 1986-11-28 PROCESS FOR MAKING A CUTTING AND SCRATCHING TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3606315 1986-02-27
DE3606315A DE3606315C1 (en) 1986-02-27 1986-02-27 Cutting and scoring tools

Publications (3)

Publication Number Publication Date
EP0234009A1 EP0234009A1 (en) 1987-09-02
EP0234009B1 true EP0234009B1 (en) 1989-04-05
EP0234009B2 EP0234009B2 (en) 1994-08-24

Family

ID=6295036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116555A Expired - Lifetime EP0234009B2 (en) 1986-02-27 1986-11-28 Method of manufacturing a cutting and indenting tool

Country Status (6)

Country Link
US (1) US4829854A (en)
EP (1) EP0234009B2 (en)
AT (1) ATE41891T1 (en)
DE (1) DE3606315C1 (en)
ES (1) ES2007574T5 (en)
GR (1) GR3000039T3 (en)

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DE3101988A1 (en) * 1981-01-22 1982-09-02 Württembergische Metallwarenfabrik AG, 7340 Geislingen Knife

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DE3606315C1 (en) 1987-08-06
ES2007574T5 (en) 1995-08-16
EP0234009A1 (en) 1987-09-02
US4829854A (en) 1989-05-16
EP0234009B2 (en) 1994-08-24
ATE41891T1 (en) 1989-04-15
GR3000039T3 (en) 1990-01-31
ES2007574B3 (en) 1989-06-16

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