EP0803334B1 - Couteau rotatif - Google Patents

Couteau rotatif Download PDF

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Publication number
EP0803334B1
EP0803334B1 EP97102546A EP97102546A EP0803334B1 EP 0803334 B1 EP0803334 B1 EP 0803334B1 EP 97102546 A EP97102546 A EP 97102546A EP 97102546 A EP97102546 A EP 97102546A EP 0803334 B1 EP0803334 B1 EP 0803334B1
Authority
EP
European Patent Office
Prior art keywords
slot
slit
circular
circular cutter
cutter 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 - Lifetime
Application number
EP97102546A
Other languages
German (de)
English (en)
Other versions
EP0803334A3 (fr
EP0803334A2 (fr
Inventor
Robert Becker
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.)
Indunorm Hydraulik GmbH
Original Assignee
Indunorm Hydraulik 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 Indunorm Hydraulik GmbH filed Critical Indunorm Hydraulik GmbH
Publication of EP0803334A2 publication Critical patent/EP0803334A2/fr
Publication of EP0803334A3 publication Critical patent/EP0803334A3/fr
Application granted granted Critical
Publication of EP0803334B1 publication Critical patent/EP0803334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B26D2001/0046—Cutting members therefor rotating continuously about an axis perpendicular to the edge
    • 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
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations

Definitions

  • the invention relates to a circular knife, in particular for Cutting of hydraulic hoses reinforced with reinforcement, according to the preamble of claim 1 or claim 2.
  • Such circular knives are made of tool steel, high-speed steel, Carbide, as well as other special materials, the cutting area being coated or surface-treated can be.
  • Circular knives with a smooth cutting edge and those with are known serrated or slotted cutting edge and knife with special Cut, for example with a cullet cut.
  • the knife with a smooth cutting edge have the disadvantage that - depending on Stress - often need to be re-grinded to achieve a to get consistently good cut quality. This creates a considerable amount of time for changing the Circular knives and shipping for regrinding as well as substantial Regrinding costs.
  • Circular knives have therefore already been developed that work on your Are circumferentially toothed, the tooth segments of the same length Slots are limited. These versions have better ones Properties and service life as a knife with a smooth Cutting edge.
  • the arranged on the circumference of the circular knife Avoid excessive overheating in the area of the slots Cut and ensure a lower incline when new to cracks and breakouts after wear-related
  • the reduction in tooth height or slot depth increases again. This also applies if the distances between the slots are too big.
  • a circular knife is also known from US Pat. No. 1,975,219. in the case of the radially extending slots with two alternating depths are provided. Would such a knife for cutting with reinforcement reinforced hydraulic hoses, the result would be disadvantages mentioned above.
  • the invention is based on a prior art, such as he has been described above, based on the task To create circular knives, which on the one hand due to its special Cutting geometry less or not at all to overheating tends, which increases the service life and which if necessary can be reground more often without it being his loses advantageous properties.
  • the invention solves this problem according to claim 1 in that the depth of the slots periodically alternating at least three has different dimensions, such that to a maximum length Slit that is in the area of the start of the chamfer or above runs out, initially a minimally long slot follows, which in turn is followed by a slot, the length of which lies between the first two, followed by another minimal long, that as the tooth segment width the distance between two maximum long slots is defined and the ratio from segment width to slot depth> 1.2 and the angle between the slots (4) and the radius between 10 ° and 20 ° is.
  • the invention also achieves this object according to the subordinate one Claim 2.
  • slots have another according to DE-A-29 02 661 Task as the slots in the circular knife according to the invention.
  • the known slots are intended to serve as resonance disasters to prevent in the saw blade.
  • the embodiment according to claim 2 is a continuous slot on which a slot / slot combination consisting of a shorter slot and follows three subsequent oblong holes, for example which is another slot / slot combination consisting of one longer slot and a subsequent longer one Long hole follows. Then a new period begins Slot or slot / slot combinations.
  • each slot / slot combination the same length, so ends on one common circular line, wherein according to claim 3 the end of Slot / slot combinations on the circular line an ice-shaped Has widening. Through these circular holes is achieved in addition to the swirling effect that the inclination to thermal stresses and the subsequent cracking and Outbreaks are counteracted.
  • Claim 4 proposes a further embodiment of Slot / slot combinations, which is designed so that a combination with a slot with an aligned slot follows from two aligned elongated holes that are offset to the adjacent slot of the slot / slot combination are arranged.
  • the division should be chosen as large as possible without the Endanger the stability of the emerging segments. According to claim 5 should be the ratio of segment width to slot depth > 1.2. With a given division you get the Segment width and thus the maximum permissible slot depth. at the embodiment according to the invention with three or more Grading of the slot depths is called the segment width, the distance defined between two slots of the same length.
  • the slots or the slots and with them aligned elongated holes at an angle of 10 ° to 20 ° in the direction of rotation against the radius, so that in the direction of rotation the beginning of the slot on the circumference of the circular knife the end of the slot or slot / slot combination lags.
  • the angle 15 ° In a preferred embodiment according to claim 8 the angle 15 °.
  • a further improvement in tool life before regrinding the cutting edge is characterized by a relatively acute bevel angle Reached cutting edge, which is formed according to claim 9 double-ended and a bevel angle of> 3 °, preferably 3 - 4 ° having.
  • a pre-chamfer is not necessary here.
  • the hardness of the knife material is, for example more than 60 HRC in the high-speed steel version.
  • a circular knife is thus obtained by the invention, which by the special geometry of the cutting edge, by the chosen one Hardness of the material and possible coatings in the Cutting area has a significantly longer life and which can be reground several times if necessary, without much change in the special geometry of the cutting edge, so the benefits that a new knife has, too then are still roughly given.
  • the cutting edge 2 is in all Embodiments formed double-phase, the bevel angle for example, is 4 °, but can also be 3 °.
  • the cutting area is toothed
  • the individual tooth segments 3 are formed by slots 4, which are at an angle relative to the radius r of 15 ° from the circumference in the present example Extend towards chamfer 5. It hurries in the direction of rotation the knife the beginning of the slot on the circumference of the cutting edge 2 Slot end after.
  • the slots 4 have different depths in a periodic sequence on. A minimally long slot 4 is followed by a minimal one longer, followed by a slit, the depth of which is approximately half the length of the maximum long slot and double of the minimally long slot. This concludes a minimally long slit reappears, whereupon the period starts again.
  • a division of 112 is chosen here, the slot depth with a circle diameter of 300 mm 5, 10 and 20 mm and the slot width is 1.2 mm.
  • the longest slot 4 ends in the area of the start of the chamfer 5.
  • a maximum long slot 4 is provided, which is in the area the beginning of the chamfer 5 ends.
  • On this continuous Slot 4 follows a slot / slot combination 4, 6, wherein the slot has a minimal length and - with this aligned - connect three elongated holes 6 arranged one behind the other.
  • the last slot 6 ends on the same circular line like the maximum long slot 4.
  • This slot / slot combination 4, 6 is followed by another Slot / slot combination, the slot 4 has a depth, the between those of the maximum long slot 4 and the minimally long slot of the previous combination lies.
  • An elongated hole 6 is aligned with this medium-length slot, whose length is chosen so that it is on the same circular line ends like the maximum long slot 4.
  • the slots 4 and elongated holes 6 ending on this circular line are provided with circular widenings 8 at this end.
  • the angle of inclination of the slots or slot / slot combinations is the same as in the other examples 15 °, the width of the slots 4 or slots 6 is 1.2 mm.
  • FIGS. 1 to 3 an embodiment is shown which is roughly constructed like the exemplary embodiment according to FIGS. 1 to 3 is, however, with a knife diameter of 520 mm Has division of 200. In this latter example the maximum long slot extends beyond the beginning of the chamfer 5 beyond.
  • the cutting principle is due to the Geometry of the cutting edge is more like grinding.
  • the material e.g. Rubber and the reinforcements (e.g. higher strength Steel wire) worn point or line by line, similar like cut-off, but with an extremely narrow, defined one Cutting edge.
  • the cutting process is reinforced by the impulse effect the segments of the cutting edge.
  • the dash-dotted line 7 indicates the beginning of the cutting area on, which is provided with a coating, for example made of titanium carbon nitride.
  • the layer thickness can be 1.5 to 4 ⁇ m be. Such a coating can of course be realized in all embodiments.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (13)

  1. Couteau circulaire (1), en particulier pour couper des tuyaux hydrauliques renforcés avec des armatures, comportant une lame biseautée au moins d'un côté dont le pourtour est denté, les différents segments de dent (3) étant séparés les uns des autres par des fentes (4) qui s'étendent depuis le pourtour vers l'intérieur, selon un angle fixe par rapport au rayon (r),
    caractérisé en ce que la profondeur des fentes (4) présente au moins trois cotes différentes, en une alternance périodique, de manière qu'à une fente de longueur maximale, qui s'étend jusque dans la zone du début de biseau (5) ou au-delà, succède d'abord une fente de longueur minimale, à laquelle succède à son tour une fente dont la longueur se situe entre les deux premières, suivie à son tour d'une fente de longueur minimale, en ce qu'il est défini comme largeur du segment de dent la distance entre deux fentes (4) de longueur maximale et le rapport de la largeur du segment à la profondeur de la fente est supérieur à 1,2, et l'angle entre les fentes (4) et le rayon est compris entre 10° et 20°.
  2. Couteau circulaire (1), en particulier pour couper des tuyaux hydrauliques renforcés avec des armatures, comportant une lame biseautée au moins d'un côté dont le pourtour est denté, les différents segments de dent (3) étant séparés les uns des autres par des fentes (4) qui s'étendent depuis le pourtour vers l'intérieur, selon un angle fixe par rapport au rayon (r),
    caractérisé en ce qu'au moins une fente (4) sur deux est alignée avec au moins un trou oblong (6, 6') dont la largeur est approximativement égale à la largeur de fente, en ce que chaque combinaison fente/trou oblong (4, 6, 6') se termine sur une ligne circulaire commune et en ce que symétriquement à une fente (4), s'étendant jusqu'à la ligne circulaire, il est prévu sur chaque côté au moins une combinaison constituée d'une fente (4) et d'au moins un trou oblong (6, 6') aligné avec celle-ci.
  3. Couteau circulaire selon la revendication 2,
    caractérisé en ce que l'extrémité de la combinaison fente/trou oblong (4, 6, 6') sur la ligne circulaire présente un élargissement (8) de forme circulaire.
  4. Couteau circulaire selon l'une des revendications 2 ou 3,
    caractérisé en ce qu'il est prévu, entre deux combinaisons fente/trou oblong (4, 6), commençant sur le pourtour du couteau (1), au moins un trou oblong (6'), ce ou ces trous oblongs (6') étant décalés par rapport au trou oblong (6) voisin de la combinaison fente/trou oblong (4, 6).
  5. Couteau circulaire selon l'une des revendications 2 à 4,
    caractérisé en ce que le rapport entre la largeur de segment et la profondeur de fente est supérieure à 1,2, la largeur de segment étant la distance entre deux fentes (4) de même profondeur.
  6. Couteau circulaire selon l'une des revendications 1 à 5,
    caractérisé en ce que la largeur de fente est de 1 à 1,2 mm.
  7. Couteau circulaire selon l'une des revendications 1 à 6,
    caractérisé en ce que les fentes (4) sont inclinées d'un angle de 10° à 20° dans le sens de rotation, par rapport au rayon (r).
  8. Couteau circulaire selon la revendication 1 ou 7,
    caractérisé en ce que l'angle est de 15°.
  9. Couteau circulaire selon l'une des revendications 1 à 8,
    caractérisé en ce que la lame (2) est à double biseau et présente un angle de biseau de 3° à 4°.
  10. Couteau circulaire selon l'une des revendications 1 à 9,
    caractérisé en ce que la zone de la lame présente un revêtement.
  11. Couteau circulaire selon la revendication 10,
    caractérisé en ce que le revêtement est en titane.
  12. Couteau circulaire selon la revendication 10,
    caractérisé en ce que le revêtement est en carbonitrure de titane.
  13. Couteau circulaire selon l'une des revendications 1 à 12,
    caractérisé en ce que la dureté du couteau est supérieure à 60 HRC dans la version en acier à coupe rapide.
EP97102546A 1996-04-26 1997-02-18 Couteau rotatif Expired - Lifetime EP0803334B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19616678 1996-04-26
DE19616678A DE19616678C1 (de) 1996-04-26 1996-04-26 Kreismesser

Publications (3)

Publication Number Publication Date
EP0803334A2 EP0803334A2 (fr) 1997-10-29
EP0803334A3 EP0803334A3 (fr) 1998-06-10
EP0803334B1 true EP0803334B1 (fr) 2002-01-09

Family

ID=7792506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102546A Expired - Lifetime EP0803334B1 (fr) 1996-04-26 1997-02-18 Couteau rotatif

Country Status (3)

Country Link
EP (1) EP0803334B1 (fr)
AT (1) ATE211673T1 (fr)
DE (1) DE19616678C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1302763B1 (it) 1998-09-07 2000-09-29 Tristano Ciani Utensile circolare per il taglio di rotoli di carta e simili
DE102016005443A1 (de) * 2016-05-06 2017-11-09 Dipl.lng. S c h i n d l e r & Wagner GmbH & Co KG Schneidmesser, Vorrichtung zum Aufschneiden von Lebensmittelprodukten mit einem solchen Schneidmesser sowie Verwendung und Verfahren zur Herstellung eines Schneidmessers

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE657057A (fr) *
US1723843A (en) * 1926-06-25 1929-08-06 E C Atkins & Company Fast speed cutter
US1975219A (en) * 1932-08-05 1934-10-02 Seiberling Rubber Co Cutter for bias cutting machines
DE889831C (de) * 1951-10-27 1953-09-14 Matthias Jans Hobelkreissaege
CH462650A (de) * 1966-12-09 1968-09-15 Blaettler Wilhelm Kreissägeblatt, insbesondere zum Sägen von Knochen, Feinfaserholz, Kunststoff oder Nichteisenmetallen, mit über den Kreisumfang mit Abständen voneinander verteilten Sägezähnen
US3981216A (en) * 1973-06-06 1976-09-21 Lemmon & Snoap Co. Low noise, high speed saw blade
FI780507A (fi) * 1978-02-16 1979-08-17 Ahlstroem Oy Cirkelsaogblad
IT1162977B (it) * 1983-10-31 1987-04-01 Mario Bruno Mole abrasive a dentatura rinnovabile
AT394680B (de) * 1988-02-03 1992-05-25 Boehler Gmbh Linien- schneidmesser fuer die bearbeitung von flaechigem material
US4854204A (en) * 1988-03-03 1989-08-08 Am International Incorporated Rotary knife paper trimmer with long life shearing surfaces for trimming thick and shingled paper products
US5078035A (en) * 1989-08-21 1992-01-07 Diamond Products, Inc. Circular saw blade

Also Published As

Publication number Publication date
EP0803334A3 (fr) 1998-06-10
ATE211673T1 (de) 2002-01-15
DE19616678C1 (de) 1997-09-04
EP0803334A2 (fr) 1997-10-29

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