EP0265622B1 - Arbre porte-lames - Google Patents

Arbre porte-lames Download PDF

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Publication number
EP0265622B1
EP0265622B1 EP87112395A EP87112395A EP0265622B1 EP 0265622 B1 EP0265622 B1 EP 0265622B1 EP 87112395 A EP87112395 A EP 87112395A EP 87112395 A EP87112395 A EP 87112395A EP 0265622 B1 EP0265622 B1 EP 0265622B1
Authority
EP
European Patent Office
Prior art keywords
groove
cutter
knife
block according
cutter block
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
EP87112395A
Other languages
German (de)
English (en)
Other versions
EP0265622A2 (fr
EP0265622A3 (en
Inventor
Dieter Krautzberger
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.)
Oertli Werkzeuge AG
Original Assignee
Oertli Werkzeuge AG
Babcock BSH 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
Priority claimed from DE19863636618 external-priority patent/DE3636618A1/de
Application filed by Oertli Werkzeuge AG, Babcock BSH AG filed Critical Oertli Werkzeuge AG
Priority to AT87112395T priority Critical patent/ATE90017T1/de
Publication of EP0265622A2 publication Critical patent/EP0265622A2/fr
Publication of EP0265622A3 publication Critical patent/EP0265622A3/de
Application granted granted Critical
Publication of EP0265622B1 publication Critical patent/EP0265622B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1934—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/1938—Wedge clamp element
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1942—Peripherally spaced tools

Definitions

  • the invention relates to a knife shaft for a planer according to the preamble of patent claim 1.
  • the self-locking centrifugal wedge lies in the direction of flight behind the knife directly on the knife.
  • the profiling of the knife positively engages in a corresponding profiling of the side wall of the groove.
  • This lamellar structure is subject to inaccuracies due to tolerances, which are exacerbated by reduced bending stiffness and recurring unbalance problems. Depending on the type of wood to be processed, they can affect the surface quality of the workpiece. This limits the scope.
  • Another disadvantage of the lamella structure is the risk of crevice corrosion. Due to the arrangement of the centrifugal wedge behind the knife, the critical cross-section behind the centrifugal wedge is very narrow and therefore tends to so-called bending or rearing up.
  • Wood cutting machines started using cheap disposable knives several years ago to avoid the time-consuming regrinding of the knives. From DE-OS 25 59 406 it is also known to use profiled disposable knives which engage in a form-fitting manner in tongue and groove connection in correspondingly profiled counter surfaces and are more precisely fixable and easier to replace compared to the previously known perforated disposable knives .
  • the centrifugal wedge rests with one clamping surface on a side wall of the groove and with the other wedge surface on the retaining strip.
  • the centrifugal wedge whose wedge angle is obviously far outside the self-locking range, is pushed outwards by a spring.
  • the holding strip is displaceable in the transverse direction relative to the shaft body in order to enable the knife to be changed - in one exemplary embodiment under spring pressure.
  • Various auxiliary devices are obviously required to change the knife and to adjust the new knife. Since the position of the knife depends on the exact fit of several interlocking parts, tolerance-related inaccuracies can add up. Such inevitable inaccuracies may be portable in cutting machines for which the knives are intended according to DE-OS 25 59 406. However, planer machines place far higher demands on accuracy.
  • DE-OS 34 12 251 relates to a knife holder for the knife shaft of a wood cutting machine, in which axially parallel, narrowing towards the lateral surface grooves with radially inner groove base each a knife clamped by a centrifugal wedge sits. This is connected by screws with two slotted perforated plates and a pressure bar to form an assembly. In the operating state, a clamping strip sits between the pressure strip and the centrifugal wedge, which, together with two clamping strip springs and a clamping strip foot screwed to the base of the groove, forms a second assembly.
  • the pressure bar and the clamping bar are provided with interlocking profiles.
  • the two clamping bar springs spring up, which opens the play-free connection between the pressure bar and the clamping bar to such an extent that the assembly to which the knife belongs can be removed radially.
  • the invention has for its object to provide a knife shaft according to the preamble of claim 1, which is easy to manufacture while maintaining the form-fitting holder of the disposable knife.
  • the retaining strip is arranged at such a distance from the side wall of the groove that, when the centrifugal wedge is released, an intermediate knife can be easily pulled out in the longitudinal direction and a new knife can be inserted practically without play.
  • the centrifugal wedge When the centrifugal wedge generates the clamping force by rotation, the retaining strip is pressed against the disposable knife by slight elastic deformation, so that it is immovably fixed.
  • the disposable knife is in direct contact with the solid shaft body. This ensures a tight fit.
  • the back of the knife rests on the groove wall; this makes the critical cross-section behind the knife stiffer against so-called bending or rearing up.
  • the feature of claim 5 ensures that the retaining bar remains immovable in the long run.
  • the feature of claim 6 prevents the attachment from loosening at a standstill. This eliminates the need for additional tensioning elements, such as springs or the like.
  • the feature of claim 7 enables the centrifugal wedge to be pretensioned in the idle state.
  • the clamping force can be reduced if necessary.
  • the drawing serves to explain the invention on the basis of two simplified exemplary embodiments.
  • the performance examples each show a partial cross section of the knife shaft according to the invention.
  • a shaft body 1 made of solid material several axially parallel grooves 2 narrowing towards the outer surface are provided at uniform angular intervals.
  • One side wall 3 of the groove 2 includes an angle ⁇ of approximately 30 ° with the associated radius.
  • the side wall 3 is referred to in the following as “rear side wall” because it lies at the rear, in relation to the direction of flight symbolized by the arrow A.
  • the other side wall 4, the "front side wall” is radial or approximately radial.
  • the bottom of the groove consists of two strips 5, 6 of approximately equal width which are offset from one another in steps, each of which forms a right angle with the adjacent side wall 3 or 4 of the groove 2.
  • the skirting board 7 is immovable on the strip 5 of the groove base lying at right angles to the rear side wall 3 screwed tight.
  • the screws 9 are secured by adhesive.
  • the baseboard 7 is only as wide as is necessary for the attachment of the screws 9. It is relatively thick; their thickness corresponds to about half the width. It is therefore practically non-deformable.
  • the holding strip 8 is plane-parallel to the rear side wall 3 and extends over its full height to the outer surface of the shaft body 1. It is much wider than the baseboard 7 and about half as thick. It is therefore elastically deformable under the action of a strong force, although the bending stiffness is quite high.
  • a disposable knife 10 is clamped, which is designed in the usual way as a reversible knife with two cutting edges 11, 12.
  • One cutting edge 11 protrudes a little from the cylindrical outer surface of the shaft body 1.
  • the disposable knife 10 has a groove 13 on the side which bears against the retaining strip 8.
  • the surface of the retaining strip 8 facing the knife is provided with a tongue 14, the width of which corresponds exactly to the groove 13, so that the tongue 14 fits positively into the Groove 13 engages.
  • the back of the disposable knife 10 lying directly against the rear side wall 3 is completely flat.
  • a centrifugal wedge 15 with the clamping surfaces 16, 17 is suitably seated.
  • the clamping surface 16 is wide and therefore lies against the front side wall 4 almost at its entire height.
  • the other clamping surface 17 is narrow and only lies directly opposite the disposable knife 10 on the front of the retaining strip 8.
  • the shortening of the clamping surface 17 is brought about by two arcuate recesses 18, 19 arranged at a corner.
  • the one recess 18, which adjoins the bevelled narrow end face 20 of the retaining strip 8, forms a chip pocket in front of the cutting edge 11.
  • the other recess 19 is necessary considering screws 9.
  • relatively narrow webs 21 and 22 run.
  • the outer web 21 is in tension State almost flush with the lateral surface of the shaft body 1.
  • the inner web 22 lies plane-parallel above the strip 6 of the groove base at a short distance.
  • the centrifugal wedge 15 can be made of steel, but also of light metal if a reduced clamping force is desired.
  • the centrifugal wedge 15 is first released by applying force against the web 21.
  • the retaining strip 8 which is slightly deformed in the tensioned state in the direction of the disposable knife 10, returns to its relaxed position.
  • centrifugal wedge 15 is designed to be self-locking, it remains in the tensioned state even after the knife shaft has stopped.
  • the clamping surface of the centrifugal wedge 25, which faces the front side wall 4 of the groove 2 is provided in the middle with a wide longitudinal groove 26, so that only the edge zones 27, 28 abut.
  • the centrifugal wedge 25 there are several radial adjusting screws 29 distributed over the length, which are supported on the bottom of the groove. With the help of the set screws 29, a certain preload can be generated even in the idle state.
  • FIG. 2 is the same as the exemplary embodiment shown in FIG. 1 except for minor structural deviations.
  • One of these deviations is that the lateral mating surfaces of the tongue and groove connection between the disposable knife and the retaining strip are chamfered.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Milling Processes (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)

Claims (8)

  1. Arbre porte-lames pour une raboteuse, comportant un élément d'arbre (1) présentant plusieurs rainures (2) parallèles à l'axe qui se rétrécissent vers la surface d'enveloppe, qui comportent un fond de rainure (5, 6) situé radialement à l'intérieur et dans lesquelles il y a chaque fois une lame à usage unique (10) pourvue d'un profil de blocage et serrée par une clavette centrifuge (15), le profil de blocage étant en prise dans un profil antagoniste correspondant, caractérisé en ce que l'élément d'arbre (1) est réalisé en une pièce et en ce que le profil antagoniste est réalisé sur une barre de blocage (8), en une pièce, qui est agencée entre clavette centrifuge (15) et lame à usage unique (10) et est élastiquement déformable et qui est reliée de façon immobile à l'élément d'arbre (1) au fond de la rainure.
  2. Arbre porte-lames suivant la revendication 1, caractérisé en ce que la lame à usage unique (10) est appuyée directement sur une paroi latérale (3) de la rainure (2), par son côté tourné à l'écart de la barre de blocage (8).
  3. Arbre porte-lames suivant la revendication 2, caractérisé en ce que la barre de blocage (8) est agencée devant la lame à usage unique (10) dans le sens du déplacement.
  4. Arbre porte-lames suivant l'une des revendications 1 à 3, caractérisé en ce que la barre de blocage (8) forme avec une barre de base (7) un profilé en forme de L en section transversale et en ce que la barre de base (7) est vissée au fond de la rainure (2).
  5. Arbre porte-lames suivant la revendication 4, caractérisé en ce que les vis (9) sont fixées avec un adhésif.
  6. Arbre porte-lames suivant l'une des revendications 1 à 5, caractérisé en ce que la clavette centrifuge (15, 25) est autobloquante.
  7. Arbre porte-lames suivant l'une des revendications 1 à 6, caractérisé en ce que la clavette centrifuge (25) peut être appuyée sur le fond de la rainure (2) par des vis de réglage (29).
  8. Arbre porte-lames suivant l'une des revendications 1 à 7, caractérisé en ce que la clavette centrifuge (15, 25) est constituée d'un métal léger, par exemple d'aluminium.
EP87112395A 1986-10-28 1987-08-26 Arbre porte-lames Expired - Lifetime EP0265622B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112395T ATE90017T1 (de) 1986-10-28 1987-08-26 Messerwelle.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19863636618 DE3636618A1 (de) 1986-10-28 1986-10-28 Messerwelle
DE3636618 1986-10-28
DE3811601A DE3811601A1 (de) 1986-10-28 1988-04-07 Wellenkoerper einer messerwelle

Publications (3)

Publication Number Publication Date
EP0265622A2 EP0265622A2 (fr) 1988-05-04
EP0265622A3 EP0265622A3 (en) 1989-11-23
EP0265622B1 true EP0265622B1 (fr) 1993-06-02

Family

ID=25848838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112395A Expired - Lifetime EP0265622B1 (fr) 1986-10-28 1987-08-26 Arbre porte-lames

Country Status (3)

Country Link
US (1) US4907631A (fr)
EP (1) EP0265622B1 (fr)
DE (2) DE3811601A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137623A1 (de) * 1991-11-15 1993-05-19 Bosch Gmbh Robert Handhobelmaschine mit rotierendem messertraeger
US5469902A (en) * 1993-09-13 1995-11-28 American Knife, Inc. Chipper knife and knife holder assembly
DE29506458U1 (de) * 1995-04-15 1995-07-06 Gebr. Leitz GmbH & Co, 73447 Oberkochen Messerkopf, insbesondere Hobelmesserkopf
FI96288C (fi) * 1995-04-20 1996-06-10 Kone Wood Oy Laite terän kiinnittämiseksi hakun pyöritettävään kiekkoon
DE19717702B4 (de) * 1997-04-26 2006-04-20 Robert Bosch Gmbh Handhobelmaschine
DE19726993A1 (de) * 1997-06-25 1999-01-07 Jagenberg Papiertech Gmbh Messertrommel für Maschinen zum Querschneiden von Materialbahnen
DE19835725B4 (de) * 1998-08-07 2016-08-04 Robert Bosch Gmbh Hobelkopf
DE19835724B4 (de) * 1998-08-07 2007-04-26 Robert Bosch Gmbh Hobelkopf
CH709488A1 (de) 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Werkzeugkopf und Verfahren zum Einsetzen und Spannen einer Schneidplatte, sowie Schneidplatte.
US9802334B2 (en) 2014-07-10 2017-10-31 Kimwood Corporation Cutter head assembly for a knife planer
US10051798B2 (en) * 2014-11-12 2018-08-21 Leonardi Manufacturing Co., Inc. Various improvements to stump cutting tool discs and elements thereof
CN104707698B (zh) * 2015-04-10 2016-11-16 广州市联冠机械有限公司 旋转刀辊、刀具组件及钢丝分离机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE617874C (de) * 1935-11-20 1936-09-05 Maschb Leya A G Vorrichtung zum Halten der Messer in der Messerwelle fuer Hobelmaschinen
DE2159336A1 (de) * 1970-12-16 1972-07-06 Dijet Kogyo K K Fraeser
NL7205104A (fr) * 1972-04-14 1973-10-16
CA1040072A (fr) * 1975-07-14 1978-10-10 Arnold Schmidt Arbre porte-outil pour machine a bois
DE2723076A1 (de) * 1977-05-21 1978-11-30 Schake Kupfermuehle Masch Messerwelle fuer holzhobelmaschinen
DE2730800C3 (de) * 1977-07-07 1980-02-21 Vereinigte Edelstahlwerke Ag (Vew), Wien Messeranordnung fur eine Schragschnlttmesserwelle einer Holzzerspanungsmaschüie
DE2811669C2 (de) * 1978-03-17 1983-11-17 Karl M. Reich Maschinenfabrik GmbH, 7440 Nürtingen Hobelkopf mit Wendemessern
EP0033382B1 (fr) * 1980-01-31 1984-11-28 HOMBAK Maschinenfabrik GmbH u. Co KG Outil rotatif pour la fabrication de copeaux de bois plats
DE3102065C2 (de) * 1980-03-08 1986-01-09 Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker Messerhalterung für Messerwellen oder Messerköpfe
DE3209445A1 (de) * 1982-03-16 1983-10-06 Reinhold W Dr Ing Elsen Messerwelle fuer die erzeugung flaechiger holzspaene
DE3412251A1 (de) * 1984-04-02 1985-10-10 Dimetal Z.I. du Phare, Mérignac Messerhalterung fuer die messerwelle einer holzzerspanungsmaschine
DE3437688C1 (de) * 1984-10-15 1986-01-23 Inter-Wood-Maschinen GmbH & Co KG, 8923 Lechbruck Messerhalterung für den Messerkopf einer Holzzerspanungsmaschine

Also Published As

Publication number Publication date
EP0265622A2 (fr) 1988-05-04
DE8816602U1 (de) 1990-01-04
US4907631A (en) 1990-03-13
DE3811601A1 (de) 1989-10-26
EP0265622A3 (en) 1989-11-23

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