EP0271481B1 - Procédé et ébauche pour fabriquer des outils - Google Patents

Procédé et ébauche pour fabriquer des outils 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
Authority
EP
European Patent Office
Prior art keywords
cutting edge
bevel
rolling
blank
vane
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 - Lifetime
Application number
EP19870890278
Other languages
German (de)
English (en)
Other versions
EP0271481A2 (fr
EP0271481A3 (en
Inventor
Herbert Ing. Kopf
Franz Ing. Tejral
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.)
Boehler GmbH
Original Assignee
Boehler GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boehler GmbH filed Critical Boehler GmbH
Publication of EP0271481A2 publication Critical patent/EP0271481A2/fr
Publication of EP0271481A3 publication Critical patent/EP0271481A3/de
Application granted granted Critical
Publication of EP0271481B1 publication Critical patent/EP0271481B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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)

Claims (3)

1. Procédé de fabrication, à partir d'acier plat laminé à chaud, d'outils durcis par exemple par traitement thermique, de couteaux mécaniques notamment, comportant au minimum un chanfrein constituant un tranchant, caractérisé en ce que dans un profil plat (6, 12, 17), au minimum un, éventuellement deux, petit(s) côté(s) est (sont)façonné(s) en biais par laminage avec pincement du calibre des cylindres dans la dernière passe et forme(nt) un chanfrein (3, 11, 18) et une ébauche, dont le profil présente éventuellement une section transversale (9, 15, 22) de type trapèze ou parallélogramme pour l'essentiel, comporte au minimum un talon de laminage (8, 14, 20), dont la structure de matériau est homogène, talon, qui, lors du laminage, est, par refoulement du matériau hors de la cannelure, réalisé dans la zone (7, 21) du tranchant formée par l'angle aigu du côté latéral (5, 13, 19) et/ou du(des) chanfrein(s) (3, 11, 18) et des côtés obliques, pièce qui est durcie par un traitement thermique et finie par meulage au minimum dans la zone du talon de laminage (8, 14, 20).
2. Ebauche pour la fabrication à partir d'acier plat laminé à chaud d'outils durcis par exemple par traitement thermique, de couteaux mécaniques notamment, comportant au minimum un chanfrein constituant une arête de travail, un tranchant en particulier, caractérisée en ce que le profil de la coupe transversale (9, 15, 22), de 5 à 30 mm d'épaisseur et de 10 à 120 mm de largeur, présente dans la zone (7,21) de l'arête de travail ou du tranchant un talon de laminage (8, 14, 20) d'une épaisseur de 1 à 3 mm et dont le rapport épaisseur-largeur va de 1: 1 à 1: 3.
3. Ebauche selon la revendication 2, caractérisée en ce que, pour la réalisation de la zone de travail ou du tranchant (7, 21), les côtés (5, 13) et/ou le(s) chanfrein(s) (3, 11, 18) forme(nt) un angle de 30 à 90°, de 45 à 60° de préférence, le talon de laminage (8, 14, 20) constituant cette zone prévue dans la formation de l'arête de travail ou du tranchant pour la finition par meulage.
EP19870890278 1986-12-12 1987-12-04 Procédé et ébauche pour fabriquer des outils Expired - Lifetime EP0271481B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3300/86 1986-12-12
AT0330086A AT390221B (de) 1986-12-12 1986-12-12 Verfahren zur herstellung von schneidwerkzeugen

Publications (3)

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

Family

ID=3548421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870890278 Expired - Lifetime EP0271481B1 (fr) 1986-12-12 1987-12-04 Procédé et ébauche pour fabriquer des outils

Country Status (3)

Country Link
EP (1) EP0271481B1 (fr)
AT (1) AT390221B (fr)
DE (1) DE3768926D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396954B (de) * 1991-11-18 1994-01-25 Haboeck Herwig Isolierplatte zum eintreiben in mauerwerk sowie verfahren und vorrichtung zu ihrer herstellung
AT504450B1 (de) * 2006-11-13 2010-09-15 Boehler Ybbstal Profil Gmbh Einweg-schneidmesser zum zerspanen von natur- oder kunststoffen und verfahren zu deren herstellung
AT507892B1 (de) * 2009-11-27 2010-09-15 Boehler Ybbstal Profil Gmbh Verfahren zur herstellung von wendemessern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE632428C (de) * 1936-07-08 Franz Hendrichs Verfahren zur Herstellung von Klingen, Messern und aehnlichen Gegenstaenden
DE580579C (de) * 1930-12-21 1933-07-13 Tonsor Ab Verfahren zur Herstellung der Schneidkanten von duennen Rasierklingen
DE1143776B (de) * 1959-04-22 1963-02-21 Herbert Ruff K G Verfahren und Walzvorrichtung zum Herstellen von Messern mit geschliffener Schneide,insbesondere fuer Profilschneide-geraete zum Nacharbeiten von vulkanisierten Reifen
DE1802322A1 (de) * 1968-10-17 1970-07-23 Stumpp & Schuele Kg Verfahren zur Herstellung von am Umfang geschaerften Messern
DE3300105A1 (de) * 1983-01-04 1984-07-12 Barke GmbH, 6384 Schmitten Verfahren zur herstellung von ritz- oder trennmessern, insbesondere fuer die holzwolle-herstellung

Also Published As

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

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