EP0512275B1 - Outil de fraisage rotatif - Google Patents

Outil de fraisage rotatif Download PDF

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Publication number
EP0512275B1
EP0512275B1 EP92106192A EP92106192A EP0512275B1 EP 0512275 B1 EP0512275 B1 EP 0512275B1 EP 92106192 A EP92106192 A EP 92106192A EP 92106192 A EP92106192 A EP 92106192A EP 0512275 B1 EP0512275 B1 EP 0512275B1
Authority
EP
European Patent Office
Prior art keywords
tool
rotation
cutting
cutting edges
cutters
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
EP92106192A
Other languages
German (de)
English (en)
Other versions
EP0512275A2 (fr
EP0512275A3 (en
Inventor
Hans Hundegger
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0512275A2 publication Critical patent/EP0512275A2/fr
Publication of EP0512275A3 publication Critical patent/EP0512275A3/de
Application granted granted Critical
Publication of EP0512275B1 publication Critical patent/EP0512275B1/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
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters
    • B27G13/10—Securing the cutters, e.g. by clamping collars
    • 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
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/10—Measures preventing splintering of sawn portions of wood

Definitions

  • the invention relates to a method for processing wooden workpieces in woodworking machines with a rotating milling tool, with circumferentially arranged cutting knives with cutting edges which are assigned in opposite directions of rotation, all cutting knives being rigidly connected to the tool body, all cutting edges being at the same distance from the axis of rotation and wherein the workpiece and the tool are moved relative to one another, wherein the workpiece machining is started with a direction of rotation of the tool in which the cutting edges are directed against the beginning of the cut and the direction of rotation of the milling tool is reversed after machining the beginning of the cut, according to DE-U-90 16 128.9.
  • the invention further relates to a milling tool for performing the method.
  • DE-C 117 551 describes a milling tool with which the method specified at the outset can be carried out.
  • the tool body carries a plurality of cutting knife assemblies on the circumference, the cutting knife assemblies being able to carry out limited pivoting movements depending on the direction of rotation.
  • the cutting knife arrangements each carry two cutting edges, each of which is assigned to a direction of rotation. The oscillating suspension of the cutting knife arrangements ensures that one cutting edge is effective in one direction of rotation. In the opposite direction of rotation, the other cutting edge is then effective.
  • a milling tool of the type described it is possible to machine a workpiece, for example a wooden beam or the like, optionally in one of the two directions of rotation.
  • the invention intends to propose a method with which it is possible to improve the workflow.
  • the invention is based on procedures described at the beginning. According to the invention it is proposed that all cutting edges follow one another during rotation.
  • the direction of rotation is reversed when the axis of rotation of the milling tool has passed the plane of the beginning of the cut during the relative movement. In general, it is advisable to reverse the direction of rotation approximately in the middle of the cutting process.
  • the invention further relates to an improved milling tool with which it is possible to achieve precise cutting results when carrying out the method according to the invention.
  • the invention proposes a rotating milling tool for woodworking machines for carrying out the method specified above, the milling tool on the tool body preferably being exchangeable on the circumference Carries cutting knives that protrude a small radial dimension above the tool body, with all of the cutting edges of the cutting knives following one another and with some of the cutting edges of the cutting knives being assigned to one direction of rotation of the tool body and the other part being assigned to the opposite direction of rotation, all of the cutting edges being at the same distance from the Have axis of rotation and wherein the cutting blades are rigidly connected to the tool body.
  • the method according to the invention can be carried out with a tool in which all cutting edges are arranged on the same diameter, are rigidly connected to the tool body and follow one another during rotation, which has considerable advantages.
  • During the cutting process there is no relative movement between the cutting blades and the tool body. Only those cutting edges that are assigned to the respective direction of rotation are effective.
  • the other cutting edges do not take part in this cutting process at all. As a rule, they do not slide on the cut surface either, so that there is no danger that these cutting knives will have a negative impact on the cutting process.
  • the milling tool With the milling tool according to the invention, it is now possible to adapt the direction of rotation of the milling tool to the respective requirements by simply reversing the drive motor. It is possible that the chips are always carried out in the same direction. Depending on the machining process, the milling tool can perform milling work both on the feed and on the return stroke without reducing the quality of the machined surfaces.
  • a symmetrically designed cutting tool is used which has cutting edges on both sides in the circumferential direction.
  • the manufacturing outlay for a milling tool according to the invention therefore does not have to be increased.
  • the cutting knives using the invention may preferably have a wedge or trapezoidal shape.
  • the invention can also be implemented using known sheet-like cutting knives.
  • a wedge-shaped or trapezoidal holding element is used which fixes the sheet-like cutting knives on both sides.
  • This pre-cutter has the task, for example, of processing the lateral limitation of the gradation when producing a gradation.
  • the invention is primarily applicable to those tool bodies which have a substantially cylindrical shape and the cutting knives are arranged on the cylindrical surface of the tool body.
  • the invention is not restricted to such shapes of tool bodies.
  • the tool body can, for example, also have a conical shape if this appears necessary or expedient for special machining purposes.
  • the cutting knives are then arranged in the conical surface.
  • the invention can also be used if the cutting edges are arranged in the conical or even end face of a rotating tool body.
  • the tool body 6 with the axis of rotation 7 in the exemplary embodiment in FIG. 1 has a plurality of cutting knives 3 on the circumference 12, which in particular have a trapezoidal shape.
  • These cutting knives 3 can be fastened, for example, by screws (not shown in more detail in FIG. 1) which engage radially from the outside in the tool body 6 and hold the cutting knives 3 in place.
  • the cutting knife 3 has the cutting edges 1 and 2.
  • the tool body has recesses 13 and 14 which serve to break the chips and to allow the chips to slide off the cutting edges.
  • the recess 13 cooperates with the cutting edge 1 and the Recess 14 with the cutting edge 2.
  • the axis of rotation of the tool body 6 is designated 7.
  • a pre-cutter can be arranged on the end face 9 of the tool body 6.
  • a trapezoidal holding element 8 is provided, which is held in the tool body 6 by a screw 17.
  • the holding element 8 holds sheet-like cutting knives 4 and 5, which are secured by pins 18.
  • the cutting edges of the cutting knives 4 and 5 are designated 1 and 2 and, as in the exemplary embodiment according to FIG. 1, each cooperate with the recesses 13 and 14, respectively.
  • the roughing cutter 10 has the cutting edges 11, to which recesses 19 are also assigned.
  • the axial length of the cutting knife can be chosen freely. In some cases it is advisable to provide a single cutting knife over the entire length of the milling tool body. In some cases, however, it is better to use a plurality of knives that are offset from one another.
  • Fig. 3 shows a view of the end of the to be machined Workpiece 21.
  • a tenon is to be milled onto this workpiece by means of the milling tool 20, which rotates about the axis 7.
  • the tool 20 consists of the two tool parts 24 and 25 (see FIG. 7). The distance between these two tool parts corresponds to the width of the pin 30 which is to be milled out of the workpiece 21.
  • the parts 24 and 25 of the tool 20 have a configuration such as that shown in FIGS. 1 or 2.
  • the relative movement between the tool 20 and the workpiece 21 takes place in such a way that the tool is guided in a slide and this slide is designed to be displaceable.
  • the workpiece 21 is firmly clamped.
  • the tool can also be relatively stationary while the workpiece is being moved.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Milling Processes (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Drilling Tools (AREA)

Claims (8)

  1. Procédé d'usinage de pièces à usiner pour des machines à travailler le bois avec un outil fraiseur en mouvement de rotation (20) ayant des lames tranchantes (3,4,5) fixées à la circonférence avec des tranchants (1,2) attribués aux sens de rotation opposés, toutes les lames tranchantes étant fixées de manière rigide sur la fraise (6) et tous les tranchants ayant la même distance par rapport à l'axe de rotation, l'outil fraiseur (20) et la pièce à usiner (21) étant en mouvement relatif l'un vers l'autre, l'usinage étant commencé par un sens de rotation de l'outil fraiseur (20) ayant les tranchants orientés contre le début de la coupe et après le début de l'usinage, le mouvement de rotation de l'outil (20) étant inversé, caractérisé en ce que tous les tranchants (1,2) se suivent pendant le mouvement de rotation.
  2. Procédé suivant la revendication 1 caractérisé en ce que l'inversion du mouvement de rotation est commandée, dés que l'axe de rotation (7) de l'outil fraiseur (20) passe le plan (23) du début de la coupe (22) pendant le mouvement relatif.
  3. Procédé suivant l'une des revendications 1 ou 2 caractérisé en ce que le mouvement relatif entre l'outil fraiseur (20) et la pièce à usiner (21) est arrêté et repris un peu en sens opposé, le mouvement de rotation de l'outil fraiseur (20) est ensuite inversé et le mouvement relatif reprend dans le sens de début.
  4. Outil fraiseur en mouvement de rotation (20) pour des machines à travailler le bois pour réaliser le procédé suivant l'une des revendications précédentes, l'outil fraiseur ayant des lames tranchantes (3,4,5) de préférences échangeables, fixées à la circonférence (12) de la fraise (6) dépassants de peu la fraise dans le sens radiale ayant des tranchants (1,2) se suivants avec une partie des tranchants attribuée à un sens de rotation et l'autre partie au sens opposé, ayant tous la même distance par rapport à l'axe de rotation (7), les lames tranchantes (3,4,5) étant fixées de manière rigide sur la fraise (6).
  5. Outil fraiseur suivant la revendication 4 caractérisé par une lame tranchante (3) symétrique ayant des deux côtés des tranchants (1,2) dans le sens du périmètre.
  6. Outil fraiseur suivant l'une des revendications 4 ou 5 caractérisé en ce que les lames tranchantes (3) ont une forme d'une clavette ou trapézoïdale.
  7. Outil fraiseur suivant l'une des revendications 4 à 6 caractérisé en ce qu'un élément de fixation (8) de forme d'une clavette ou trapézoïdale fixe la lame tranchante (4,5) ayant une forme d'un feuille bilatéral.
  8. Outil fraiseur suivant l'une des revendications 4 à 7 caractérisé en ce que les lames donnant les premières coupes (10) possèdent des tranchants (11) pour les deux sens de rotation et sont fixées à la face frontale (9) de la fraise (6).
EP92106192A 1991-05-08 1992-04-10 Outil de fraisage rotatif Expired - Lifetime EP0512275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4115095A DE4115095A1 (de) 1991-05-08 1991-05-08 Rotierendes fraeswerkzeug
DE4115095 1991-05-08

Publications (3)

Publication Number Publication Date
EP0512275A2 EP0512275A2 (fr) 1992-11-11
EP0512275A3 EP0512275A3 (en) 1993-03-03
EP0512275B1 true EP0512275B1 (fr) 1996-09-25

Family

ID=6431288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106192A Expired - Lifetime EP0512275B1 (fr) 1991-05-08 1992-04-10 Outil de fraisage rotatif

Country Status (3)

Country Link
EP (1) EP0512275B1 (fr)
AT (1) ATE143303T1 (fr)
DE (2) DE4115095A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1818151A1 (fr) * 2006-02-08 2007-08-15 Blastrac B.V. Fraise rotative réversible
DE102006009203A1 (de) 2006-02-24 2007-08-30 Arntz Beteiligungs Gmbh & Co. Kg Rotierend antreibbares Schneid- bzw. Fräswerkzeug zum Bearbeiten zäher, elastischer oder platischer Materialien
DE102014008645B4 (de) 2014-06-13 2018-07-19 Audi Ag Stirnfräswerkzeug

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE480625C (de) * 1929-08-06 Ernst Mehring Fuer Rechts- und Linksdrehung verwendbarer Fraeser fuer Holzbearbeitung
DE117551C (fr) * 1900-01-01
GB191009820A (en) * 1910-04-22 1910-10-06 John Elsworth And Sons Ltd Improvements in Cutter-holders for Wood-working Machinery.
DE824257C (de) * 1950-08-18 1951-12-10 Friedrich Grupp Vorschneider, insbesondere fuer Fraeswerkzeuge
US2840128A (en) * 1957-05-10 1958-06-24 George L Slusser Reversible action cutting bit assembly
AT249980B (de) * 1964-06-01 1966-10-25 Josef Ing Reinberg Vorrichtung zur Kantenbearbeitung von Holzteilen mittels Fräswerkzeugen
US3672417A (en) * 1970-05-12 1972-06-27 Roberto Lugo Combination shaper blade and support therefor
SU1524999A1 (ru) * 1988-03-23 1989-11-30 Львовский Лесотехнический Институт Дереворежуща фреза
IT1238935B (it) * 1990-05-23 1993-09-07 Bacci Paolino Di Giuseppe Bacc Macchina utensile per la realizzazione di giunti su elementi costruttivi di mobili e simili

Also Published As

Publication number Publication date
DE4115095A1 (de) 1992-11-12
ATE143303T1 (de) 1996-10-15
DE59207219D1 (de) 1996-10-31
EP0512275A2 (fr) 1992-11-11
EP0512275A3 (en) 1993-03-03

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