EP0362830A2 - Couteau pour portes-outils, en particulier pour machines de travail du bois - Google Patents

Couteau pour portes-outils, en particulier pour machines de travail du bois Download PDF

Info

Publication number
EP0362830A2
EP0362830A2 EP89118433A EP89118433A EP0362830A2 EP 0362830 A2 EP0362830 A2 EP 0362830A2 EP 89118433 A EP89118433 A EP 89118433A EP 89118433 A EP89118433 A EP 89118433A EP 0362830 A2 EP0362830 A2 EP 0362830A2
Authority
EP
European Patent Office
Prior art keywords
knife
cutter
cutter head
knives
pins
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.)
Withdrawn
Application number
EP89118433A
Other languages
German (de)
English (en)
Other versions
EP0362830A3 (fr
Inventor
Harro Kröcher
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.)
Michael Weinig AG
Original Assignee
Michael Weinig AG
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 Michael Weinig AG filed Critical Michael Weinig AG
Publication of EP0362830A2 publication Critical patent/EP0362830A2/fr
Publication of EP0362830A3 publication Critical patent/EP0362830A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means

Definitions

  • the invention relates to a knife for knife heads, preferably of woodworking machines, according to the preamble of claim 1 and claim 6.
  • cutter heads In woodworking machines, in particular for the field of moulders, milling cutters and planing heads with regrindable or exchangeable knives are known as cutter heads.
  • the interchangeable knives are so-called disposable knives, which are no longer re-sharpened after wear, but are exchanged for new knives.
  • Knives of this type are known with one-sided or double-sided cutting edges and generally consist of 1 mm thick steel band with a width of approximately 16 to 19 mm.
  • the material is processed in a continuous process from a so-called coil, hardened in the cutting area and simultaneously ground. The material is then notched to length and broken. Fastening holes are punched into the soft middle part of the knife in the knives thus obtained.
  • the grooves of the cutter heads In order to reduce noise, it is known to provide the grooves of the cutter heads at an axis angle.
  • the sound that is created by the suddenly squeezed air between the table lip and / or the wood to be processed can be significantly reduced if the air can escape in the axial direction of the knife.
  • the "pulling cut” in the wood is more optimal as a cutting process.
  • the drive of the tool is spared.
  • the quality of the wooden surface is better than with "straight cut tools". This possibility is achieved by the oblique position of the grooves of the cutter head.
  • the axis angle presupposes knives whose longitudinal direction of the cutting edge is made according to a hyperboloid. As a proximity curve, a corresponding radius is also sufficiently precise in practice.
  • the hyperboloid can only be produced by expensive individual grinding of the knives.
  • profile grinding machines are required for this purpose, with which this hyperboloid-shaped course of the cutting edge must be ground. This is complex and requires great experience.
  • the invention is based on the object of developing a knife or a knife head in which this hyperboloid shape of the knife edge can be produced simply and even by inexperienced forces.
  • the knife according to the invention can be bent elastically in its plane to produce the hyperboloid-shaped cutting edge. This enables the desired hyperboloid course of the cutting edge to be achieved with ease. No specialist knowledge is required for this bending process, so that the knives can also be bent easily by less experienced persons.
  • the knives are preferably disposable, which are only replaced after wear.
  • the knives themselves can be manufactured in the conventional manner described above. Only when they are installed are these straight knives elastically bent in their plane, which then results in the hyperboloid shape of the knife edge or a correspondingly approximated radius of the edge.
  • the knife is provided with hanging openings near its ends.
  • the knife can be attached with its one opening.
  • the knife can be bent slightly elastically until it is hooked in with its other hanging opening and can thus be secured in its elastically curved position. So that the knife has a precisely defined position during the bending process, the one hanging opening has a round cross section. The knife can therefore only be pivoted about the axis of this suspension opening, but not moved.
  • the other hanging opening is elongated so that the knife can be easily hung in after the elastic bending process.
  • the width of this other hanging opening is chosen so that the knife cannot be moved transversely to the longitudinal direction of this elongated hanging opening after hanging.
  • the knife preferably consists of a tool steel strip with sufficient elasticity for bending.
  • the cutter can be reliably secured in the installed position by means of the suspension pins.
  • the abutment in the area between the suspension pins allows the knife to be bent easily and elastically in order to achieve the at least approximate hyperboloid shape of the knife edge.
  • the suspension pins are advantageously provided on the knife holder.
  • the knife head has no knife carriers, but only pressure bars, the suspension pins are preferably provided on this pressure bar.
  • the abutment for the bending process of the knife is at least attached approaches the hyperboloidal rear wall of the recess formed in the knife holder or in the pressure bar.
  • the knife is then bent with its one hanging opening so elastically in its plane that with its rear side opposite the cutting edge it lies against this rear wall of the recess and can then be hung in with its other hanging opening. Since the rear wall of the recess preferably runs continuously over the length of the knife carrier or the pressure bar, the knife can be bent elastically very uniformly, so that the desired course of the cutting edge can be optimally adjusted.
  • At least one contact pin is provided on the knife carrier or on the pressure bar as an abutment. After hanging the knife with its one hanging opening, the knife can then be bent elastically by abutting this contact pin.
  • At least three spaced-apart contact pins which define the hyperboloid shape of the cutting edge, are provided on the knife carrier or on the pressure bar in the area between the suspension pins.
  • the cutter head 1 is preferably a planing head which has cutters 2 arranged distributed over its circumference. They are housed in grooves 3, which are provided on the circumference of the cutter head 1 and extend at an axis angle ⁇ (FIG. 2). This axis angle ⁇ can be on the order of about 3 ° to about 10 °.
  • the knives 2 are each arranged on a knife carrier 4, which rests on one side wall of the groove 3. Within the grooves 3, the knives 2 and knife carriers 4 are clamped by pressure strips 5 in a known manner. The knife carrier 4 and the pressure strips 5 extend over the entire length of the Knife 2.
  • the sound level is considerably reduced when working with the cutter head 1.
  • the sound that is created by the suddenly squeezed air between the table lip and / or the wood becomes much less if the air can escape in the axial direction of the knife.
  • the "pulling cut” in the wood is more optimal as a cutting process.
  • the drive of the tool is spared.
  • the quality of the wooden surface is better than with "straight cut tools".
  • So-called disposable knives are preferably used as knives 2, which preferably have only one cutting edge 6. Since the grooves 3 are provided on the cutter head 1 at the axis angle ⁇ , the cutting edges 6 must be made in the longitudinal direction according to a hyperboloid, so that the woods machined with the cutter head have a flat outside after processing. In practice, a corresponding radius can also be sufficient as an approximation arc.
  • the knives 2 are ground in parallel and are very narrow, as shown in FIG. 3. They have a circular opening 7 at one end and an elongated hole 8 at the other end.
  • the knives 2 are so thin and so narrow that they can be bent elastically in their plane (Fig. 4). In this way, the necessary hyperboloid can be produced very simply by elastic bending of the knives in their plane. This bending process can easily be done by hand due to the thin and narrow design of the knives 2.
  • the knife holder 4 can be used as an aid.
  • the knife carrier 4 is provided with a recess 9 which is open at the end (FIG. 5) and into which the knife 2 is inserted.
  • the rear wall 10 of the recess 9 is hyperboloid.
  • the height of the recess 9 corresponds to the thickness of the knife 2, which therefore does not protrude over the top of the knife carrier 4 in the installed position (FIG. 5).
  • the chest surface 11 lies in one plane with the front 12 of the knife holder 4 (FIG. 5).
  • the knife carrier 4 can be mounted completely outside the knife head 1.
  • the tensioned package obtained in this way can then be easily inserted into the groove 3 of the cutter head 1 and tensioned there in a known manner by means of tensioning screws (not shown).
  • the size of the axis angle ⁇ is primarily a question of the elasticity of the disposable knife 2 or the maximum possible bending radius.
  • the axis angle can be up to about 10 °. Even with such a large axis angle, the knife 2 can easily be bent elastically in its plane by hand.
  • the bisector of the knife edge length to the groove 3 seen perpendicular to the axis of rotation 17 of the cutter head, runs straight and through the intersection between the axis of rotation 17 and the transverse center plane 18 of the cutter head 1. In FIG. 2, this is in the direction of rotation 19 of the cutter head, the front end of the groove 3 with V and the rear end in the direction of rotation 19 with N.
  • the rear wall 10 of the recess 9 of the knife carrier 4 can also be provided with a recess. Then the knife 2 can have not only the cutting edge 6, but also a further cutting edge on the opposite longitudinal side, which then engages in this recess in the rear wall 10 in the installed position. The knife 2 then represents a reversible knife which, after the cutting edge 6 has worn Can be turned 180 ° and clamped again in the manner described in an elastically curved position.
  • the knife carrier 4a (FIG. 6) has three support pins 20 to 22 in the area between the two index pins 14 and 15, against which the knife 2 rests with its rear side 16 in the elastically deformed position.
  • the knife carrier 4a has no recess in this embodiment, but is continuously flat on its support side 23.
  • the undeformed knife 2 (FIG. 3) is in turn first inserted with its opening 7 onto the index pin 14 of the knife carrier 4a.
  • the knife is then pivoted about the axis of the index pin 14 until it comes to rest on the support pin 20. This pin then forms an abutment when the knife 2 is bent elastically. It is then elastically bent into the position shown in FIG. 4 and inserted into the index pin 15 via the slot-shaped opening 8 in the manner described.
  • the three support pins 20 to 22 already allow a very uniform elastic bending of the knife 2, so that its cutting edge 6 has the hyperboloid shape. In the case of longer knives 2 in particular, it is advantageous to provide further support pins on the knife carrier 4a so that the knife can be bent evenly.
  • no knife carrier is provided for the knife 2.
  • the knife is based on the options described fixed directly on the knife pressure bar 5, which then has the recess 9 or the support pins 20 to 22 and the index pins 14 and 15. In the installed position, the elastically curved knife 2 then lies between the knife pressure bar 5 and the side wall of the groove 3 of the knife head 1.
  • the cutter head 1 is designed so that the conventional regrindable knives can be used in it, which have a thickness of 3 mm and a width of 30 mm.
  • a conventional knife is inserted directly into the groove 3 and clamped in the groove 3 by means of the knife pressure bar 5. It is therefore possible either to arrange the elastically curved knife 2 with or without knife carrier and knife pressure bar in the groove 3, or to insert the conventional knife with knife pressure bar into the groove 3.
  • the hyperboloid has to be ground according to a template on a profile grinding machine. It is thus possible to retrofit knife heads that are already in use with the elastically bendable knives 2.
  • the knife cross section is preferably 1 mm thick x 8 mm high.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Manufacture Of Wood Veneers (AREA)
EP19890118433 1988-10-07 1989-10-04 Couteau pour portes-outils, en particulier pour machines de travail du bois Withdrawn EP0362830A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8812625U 1988-10-07
DE8812625U DE8812625U1 (de) 1988-10-07 1988-10-07 Messer für Messerköpfe, vorzugsweise von Holzbearbeitungsmaschinen

Publications (2)

Publication Number Publication Date
EP0362830A2 true EP0362830A2 (fr) 1990-04-11
EP0362830A3 EP0362830A3 (fr) 1991-08-07

Family

ID=6828646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890118433 Withdrawn EP0362830A3 (fr) 1988-10-07 1989-10-04 Couteau pour portes-outils, en particulier pour machines de travail du bois

Country Status (2)

Country Link
EP (1) EP0362830A3 (fr)
DE (1) DE8812625U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398401B (de) * 1992-08-26 1994-12-27 Boehler Ybbstalwerke Wendemesser, insbesondere wendehobelmesser

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432792A (en) * 1921-05-31 1922-10-24 Schimmel Fridolin Cutter head for woodworking machines
DE1134193B (de) * 1955-08-23 1962-08-02 Adam Schmitt Messerwelle oder Messerkopf fuer Holzbearbeitungsmaschinen
DE1190632B (de) * 1961-04-28 1965-04-08 Wilhelm Grupp Werkzeug Und Mas Streifenmesser
CH403278A (de) * 1961-01-07 1965-11-30 Wilhelm Grupp Werkzeug Und Mas Messerwelle
EP0088990A2 (fr) * 1982-03-13 1983-09-21 Barke-Maschinenmesser GmbH Porte-outil pour un rabot
EP0092092A2 (fr) * 1982-04-15 1983-10-26 Gianfranco Cecchi Cylindre de robotage muni d'outils hélicoidaux
DE8622978U1 (de) * 1986-08-27 1986-11-27 Gebr. Leitz Gmbh & Co, 7082 Oberkochen Messerkopf, insbesondere Hobelmesserkopf

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432792A (en) * 1921-05-31 1922-10-24 Schimmel Fridolin Cutter head for woodworking machines
DE1134193B (de) * 1955-08-23 1962-08-02 Adam Schmitt Messerwelle oder Messerkopf fuer Holzbearbeitungsmaschinen
CH403278A (de) * 1961-01-07 1965-11-30 Wilhelm Grupp Werkzeug Und Mas Messerwelle
DE1190632B (de) * 1961-04-28 1965-04-08 Wilhelm Grupp Werkzeug Und Mas Streifenmesser
EP0088990A2 (fr) * 1982-03-13 1983-09-21 Barke-Maschinenmesser GmbH Porte-outil pour un rabot
EP0092092A2 (fr) * 1982-04-15 1983-10-26 Gianfranco Cecchi Cylindre de robotage muni d'outils hélicoidaux
DE8622978U1 (de) * 1986-08-27 1986-11-27 Gebr. Leitz Gmbh & Co, 7082 Oberkochen Messerkopf, insbesondere Hobelmesserkopf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398401B (de) * 1992-08-26 1994-12-27 Boehler Ybbstalwerke Wendemesser, insbesondere wendehobelmesser

Also Published As

Publication number Publication date
DE8812625U1 (de) 1988-11-24
EP0362830A3 (fr) 1991-08-07

Similar Documents

Publication Publication Date Title
DE69410271T2 (de) Messersystem für holzzerspanungsmaschinen, messer, führungselement und füllelement, sowie verfahren zum messerwechseln
EP0126285B1 (fr) Rabot électrique à main
EP0005726B1 (fr) Outil de coupe pour machine à hacher les aliments
DE3883731T2 (de) Hobelwerkzeug für eine Holzbearbeitungsmaschine.
DE19816164B4 (de) Schneidkopf
DE1752127A1 (de) Spanendes Werkzeug
EP0362830A2 (fr) Couteau pour portes-outils, en particulier pour machines de travail du bois
DE9106212U1 (de) Handkreissägemaschine
DE1149160B (de) Motorangetriebenes Handwerkzeug
DE3208377A1 (de) Verfahren und vorrichtung zum ausfraesen der baumkanten von baumstaemmen
DE29508355U1 (de) Vorrichtung zum Zerlegen von Baumstämmen in Holzerzeugnisse und Fräskopf für eine solche Vorrichtung
DE3933101A1 (de) Messer fuer messerkoepfe, vorzugsweise von holzbearbeitungsmaschinen
DE2636468A1 (de) Kopierfraesmaschine
DE69504838T2 (de) Messeranordnung und vorrichtung zum schneiden von holzwolle
EP0388786B1 (fr) Outil de rabotage électrique à une main
DE3318844C2 (fr)
DE1528304A1 (de) Zerspanungsmaschine
DE2037241B2 (de) Fraeser
DE2930415C2 (de) Vorrichtung zum Andrücken des beweglichen Messers in einer Scheidvorrichtung für Erntemaschinen
DE2037241C (de) Fräser
DE1528205C (de) Messerwelle bzw Messerkopf fur die Bearbeitung von Holz in Verbindung mit Kunststoffen und Asbestzement
DE4115095A1 (de) Rotierendes fraeswerkzeug
DE2137529C3 (de) Werkzeug zum Zerkleinern von festen Materialien
DE1947404A1 (de) Handschneidmaschine
DE1528205B1 (de) Messerwelle bzw.Messerkopf für die Bearbeitung von Holz in Verbindung mit Kunststoffen und Asbestzement.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920208