EP0157157B1 - Fraise à rainure pour le façonnage du bois ou du plastique - Google Patents

Fraise à rainure pour le façonnage du bois ou du plastique Download PDF

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Publication number
EP0157157B1
EP0157157B1 EP85102019A EP85102019A EP0157157B1 EP 0157157 B1 EP0157157 B1 EP 0157157B1 EP 85102019 A EP85102019 A EP 85102019A EP 85102019 A EP85102019 A EP 85102019A EP 0157157 B1 EP0157157 B1 EP 0157157B1
Authority
EP
European Patent Office
Prior art keywords
cutter
cutting edge
stocking
tooth
head 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
Application number
EP85102019A
Other languages
German (de)
English (en)
Other versions
EP0157157A1 (fr
Inventor
Hans Gysel
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
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 Oertli Werkzeuge AG filed Critical Oertli Werkzeuge AG
Priority to AT85102019T priority Critical patent/ATE34328T1/de
Publication of EP0157157A1 publication Critical patent/EP0157157A1/fr
Application granted granted Critical
Publication of EP0157157B1 publication Critical patent/EP0157157B1/fr
Expired 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
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/20—Edge trimming saw blades or tools combined with means to disintegrate waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • 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
    • B27G13/12—Cutter blocks; Other rotary cutting tools for profile cutting
    • B27G13/14—Cutter blocks; Other rotary cutting tools for profile cutting for cutting grooves or tenons

Definitions

  • the invention relates to a rebate or slot milling cutter for wood or plastic processing, with at least one roughly plate-shaped pre-cutter attached to the milling body, the outer edge of a first narrow side of this pre-cutter being designed as a lateral cutting edge of the milling cutter and this pre-cutter being arranged on the milling cutter body in this way that this side cutting edge describes a rotating surface during operation that is inclined at an angle of less than 90 ° to the milling cutter axis, including the milling cutter body.
  • DE-OS-2 504 012 describes a milling cutter with a pre-cutter designed as a platelet-shaped reversible knife, in which the cutting edge in the cutting position describes, when it rotates, a rotary surface which is at an angle of less than 90 °, that is to say about 89 °, is inclined to the milling cutter axis, which angle includes the milling cutter.
  • the reversible knife also works as a planer knife.
  • the side cutting edge is thus effective in order to machine the fold or groove flank of the workpiece. This prevents the fold or groove flank from having circular arc-shaped notches originating from the tip of the turning knife.
  • the fold or groove flank is therefore given a smooth, planed surface.
  • the known reversible knife has a square shape, with at least two opposite sides being designed as cutting edges.
  • the wedge angle of the cutting edges is caused by the arrangement of the narrow surface of the plate-shaped reversible knife at an acute angle to the plane of the plate.
  • This arrangement of the narrow surfaces also creates mating surfaces for the precise and safe arrangement of the turning knife on the milling cutter body.
  • the well-known milling cutter also has another indexable knife for chamfering. This is the subject of DE-PS-2 422 034.
  • the known cutter has the disadvantage that it requires two different turning knives to plan the groove or rebate flank and to chamfer or round off the edges.
  • Another particular disadvantage is that the distance between the rebate or groove base and the chamfer or rounding is fixed by the placement of the pre-cutter and the bevel knife on the milling cutter, that is, one and the same milling cutter cannot be used for different rebate or groove depths.
  • rebate and slot milling cutters according to DE-OS-2 504 012 with pre-cutter and chamfer or round knife have proven themselves in such a way that the basic concept has been retained and only improvements have been made.
  • this is achieved in that a projection projecting laterally from the plate is provided at a distance from the peripheral end of the pre-cutter, on which a chamfer or circular knife edge is formed adjacent to the side edge.
  • This configuration of the pre-cutter which additionally has a planing effect, replaces the additional turning knife that has been used for more than ten years for chamfering or rounding.
  • the additional advantage is achieved that the cutter can be used for different rebate or groove depths simply by changing the pre-cutter. It is sufficient that the projection protruding laterally from the plate is arranged on the various pre-cutters in accordance with the groove depth.
  • the plate-shaped pre-cutter is expediently designed as a reversible knife with at least two lateral cutting edges and two chamfering or circular cutting edges.
  • the chamfer or circular knife edges can be arranged at different distances from the respective peripheral end of the pre-cutter. In this case, it is sufficient to turn the reversible knife to use the milling cutter for different rebate or groove depths.
  • the projections are advantageously arranged diagonally offset from one another. This results in a particularly simple construction.
  • At least one of the opposite narrow sides can be designed as a mating surface, which rests on a corresponding mating surface on the milling cutter body. This enables the position of the cutting edge to be fixed easily. However, it is more advantageous to provide two mating surfaces, both of which appropriate mating surfaces on the cutter body to achieve the best possible fixation of the pre-cutter.
  • the lateral cutting edge in the cutting position has a clearance angle such that the projection is located on the same side of the rotating surface as the milling cutter body when the lateral cutting edge is not in the cutting position. In this case, regardless of the remaining design of the pre-cutter, there is no danger that the projection will damage the workpiece when the cutting edge is not in the cutting position.
  • the clearance angle is advantageously 6 to 12 °. However, tests have shown that a clearance angle of 8 ° is optimal for woodworking and creates enough space for the projection to form.
  • the pre-cutter is advantageously made of hard metal. This ensures a very long service life.
  • FIG. 1 shows a milling cutter 11 which can be used, for example, as a rabbet milling cutter.
  • a so-called fold 15 can be seen from FIG. 8, where the workpiece 13 is also shown.
  • the fold 15 produced with the milling cutter 11 has a fold surface 17 and a fold flank 19.
  • This fold flank 19 does not run exactly perpendicular to the cutter axis 21, but has a slight inclination of up to 1 ° to the vertical.
  • the cutter 11 can therefore be said that the lateral cutting edge 18 in the cutting position, when it rotates, describes a rotating surface 45 which is inclined at an angle of less than 90 ° to the cutter axis, which angle includes the cutter 11 (FIG. 6 ).
  • the two knives are the pre-cutter 25 designed as a reversible knife and the clearing knife 27 for processing the fold surface 17 (FIG. 8).
  • the clearing knife 27 is of no essential importance for the present invention and therefore need not be described in more detail.
  • the pre-cutter 25 advantageously consists of a body made of hard metal or hardened steel and has approximately the shape of a plate with a front side 49 and a rear side 50.
  • the cross section of the body 25 is approximately trapezoidal (FIG. 4).
  • the outer edge of a first narrow side 29 of the pre-cutter 25 is designed as a lateral cutting edge 18.
  • the outer edge of the third narrow side 31 opposite the first narrow side 29 is designed as a lateral cutting edge 18 '.
  • the roughing cutter 25 thus has two lateral cutting edges 18, 18 ', of which the lateral cutting edge 18 is in the cutting position in FIG. 1.
  • the wedge angle of the lateral cutting edges 18, 18 ' is brought about by the arrangement of the narrow sides 29, 31 at an acute angle to the plane of the platelet.
  • the oblique arrangement of the narrow sides 29, 31 serves not only to generate the wedge angle, but also as a mating surface for the precise and secure arrangement of the pre-cutter 25 on the cutter body 12.
  • a projection 33 is provided at a distance from the peripheral end 34 of the pre-cutter 25, on which a circular cutting edge 35 is formed.
  • This embodiment will now be described in more detail with reference to FIGS. 3 and 4. It can be seen there that the projection 33 protrudes from the surface 49 of the plate.
  • This projection 33 has a front surface 36, an inclined surface 51, a plane 29 common to the platelet body, and a trough-shaped surface 52. This trough-shaped surface forms, together with the plane 29, the circular cutting edge 35.
  • the lateral cutting edge 18 is seamless into the circular cutting edge 35. This creates a curve 32 in the workpiece 13 (FIG. 8).
  • a barrel cutting edge may be provided which produces a chamfer on the workpiece 13 instead of a rounding 32.
  • FIG. 3 shows, when the pre-cutter 25 is designed as a reversible cutting edge, the two halves are the same but offset from one another by 180 °.
  • the peripheral end 34 hence the end 34 ', the lateral cutting edge 18 the lateral cutting edge 18', the circular cutting edge 35 the circular cutting edge 35 ', the projection 33 the projection 33'.
  • FIG. 5 is of the same design as that of FIG. 3, but the distance of the circular cutting edge 35 or 35 'from the peripheral end 34 or 34' is greater than in FIG. 3.
  • the reamer 25 of FIG. 5 is therefore used for a larger fold depth than that of Figure 3.
  • the roughing cutter 25 is fastened on the cutter body 12 in a groove 38.
  • This groove 38 forms one to two mating surfaces 39 in the form of bevelled side surfaces for the correct arrangement of the pre-cutter 25 on the milling cutter body 12.
  • the pre-cutter 25 is advantageously fastened by means of a countersunk screw 43.
  • the pre-cutter 25 has a correspondingly countersunk opening 40 (Fig. 4, 5).
  • the groove 38 and thus also the pre-cutter 25 after it has been attached to the cutter body 12 show two special features.
  • a first is that the groove 38 inclines in such a way that a so-called clearance angle is formed between the cutting edge 18 of the pre-cutter 25 and the rotary surface 45 (FIG. 6). Since the roughing cutter 25 is platelet-shaped and the surfaces 49 and 50 are parallel (FIG. 4), the clearance angle corresponds to the angle ⁇ between the base surface 41 of the groove 38 (FIG. 2) and the flat side surface 43 'of the milling cutter body 12. In other words expressed, the base 41 of the groove 38 is inclined so that the desired clearance angle is created behind the cutting edge 18.
  • This clearance angle is advantageously dimensioned in such a way that the projection 33 ′, when the lateral cutting edge 18 ′ is not in the cutting position, is located entirely on the same side of the rotating surface 45 as the milling cutter body 12, that is to say does not protrude through the rotating surface.
  • the clearance angle can be approximately 6 to 12 °, advantageously approximately 8 °.
  • a second special feature of the arrangement of the groove 38 is that the lateral cutting edge 18 in the cutting position describes a rotating surface 45 when it rotates, which is at an angle of less than 90 ° is inclined to the milling cutter axis 21, which angle includes the milling cutter 11 (FIG. 5). In this way it is achieved that the pre-cutter 25 also exerts a planing action during operation and thus produces a smooth fold flank 19 (FIG. 8).
  • the distance between the cutting edge 35 and the front end 34 can be greater than the distance between the cutting edge 35 'and the end 34'.
  • a milling cutter 11 can be changed over by simply turning the pre-cutter for a different depth of fold.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling Processes (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)

Claims (10)

1. Fraise à feuilleret ou à rainure pour le façonnage du bois au du plastique, comportant au moins une dent dégrossisseuse (25) ayant approximativement la forme d'une plaquette et fixée au corps de fraise (12), l'arête extérieure (18) d'un premier chant de cette dent dégrossisseuse (25) étant réalisée sous forme de taillant latéral (18, 18') de la fraise et cette dent dégrossisseuse (25) étant disposée sur le corps de fraise (12) de telle manière que le taillant latéral (18, 18') décrive en service une surface de révolution (45) qui est inclinée, par rapport à l'axe de la fraise, d'un angle renfermant le corps de fraise (12) de moins de 90°, caractérisée en ce qu'il est prévu, à une certaine distance de l'extrémité périphérique (34, 34') de la dent dégrossisseuse (25), une saillie (33, 33') qui se dresse latéralement à partir de la plaquette et sur laquelle est formé, en position contiguë au taillant latéral (18, 18'), un taillant de biseautage ou d'arrondissement (35, 35').
2. Fraise selon la revendication 1, caractérisée en ce que la dent dégrossisseuse en forme de plaquette (25) est réalisée sous forme de couteau réversible avec deux taillants latéraux (18, 18') et deux taillants de biseautage ou d'arrondissement (35, 35').
3. Fraise selon la revendication 2, caractérisée en ce que deux moitiés du couteau réversible sont réalisées sous la même forme, mais disposées avec un décalage de 180° l'une par rapport à l'autre.
4. Fraise selon la revendication 2 ou 3, caractérisée en ce que l'un des taillants de biseautage ou d'arrondissement (35') est situé à une plus grande distance de l'extrémité (34') que l'autre taillant de biseautage ou d'arrondissement (35) ne l'est de l'autre extrémité (34).
5. Fraise selon l'une quelconque des revendications 2 a 4, caractérisée en ce que le couteau réversible a à peu près la forme d'un parallélogramme.
6. Fraise selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'un au moins des chants mutuellement opposés (29. 31) de la dent dégrossisseuse (25) est réalisé sous forme de surface d'ajustage qui s'applique contre une surface d'ajustage correspondante (39) sur le corps de fraise (12).
7. Fraise selon l'une quelconque des revendications 2 à 6, caractérisée en ce que le taillant latéral (18) qui se trouve en position de coupe présente un angle de dépouille dimensionné de telle manière que la saillie (33') voisine du taillant latéral (18') qui n'est pas en position de coupe se trouve entièrement du même côté de la surface de révolution (45) que le corps de fraise (12).
8. Fraise selon la revendication 7, caractérisée en ce que l'angle de dépouille est compris entre 6 et 12° .
9. Fraise selon la revendication 8, caractérisée en ce que l'angle de dépouille mesure 8°.
10. Fraise selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la dent dégrossisseuse (25) est faite de métal dur.
EP85102019A 1984-04-06 1985-02-23 Fraise à rainure pour le façonnage du bois ou du plastique Expired EP0157157B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102019T ATE34328T1 (de) 1984-04-06 1985-02-23 Falz- oder nutenfraeser fuer die holz- oder kunststoffbearbeitung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH174584 1984-04-06
CH1745/84 1984-04-06

Publications (2)

Publication Number Publication Date
EP0157157A1 EP0157157A1 (fr) 1985-10-09
EP0157157B1 true EP0157157B1 (fr) 1988-05-18

Family

ID=4217589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102019A Expired EP0157157B1 (fr) 1984-04-06 1985-02-23 Fraise à rainure pour le façonnage du bois ou du plastique

Country Status (3)

Country Link
EP (1) EP0157157B1 (fr)
AT (1) ATE34328T1 (fr)
DE (1) DE3562724D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301255U1 (fr) * 1993-01-29 1993-03-25 Schrammel, Helmut, 7920 Heidenheim, De

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397367B (de) * 1992-07-06 1994-03-25 Sperl Josef Fräswerkzeug
DE4443563C2 (de) * 1993-12-07 1996-02-22 Schrammel Helmut Dipl Ing Fh Fräsmesser sowie Tragkörper zur Halterung des Fräsmessers
CN113579640B (zh) * 2021-07-19 2023-06-30 山西平阳重工机械有限责任公司 一种高温合金材料半封闭内型腔加工方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2504012A1 (de) * 1964-10-30 1975-10-16 Oertli Werkzeuge Ag Fraeser, insbesondere falz- oder nutenfraeser mit wendeschneidmesser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301255U1 (fr) * 1993-01-29 1993-03-25 Schrammel, Helmut, 7920 Heidenheim, De

Also Published As

Publication number Publication date
ATE34328T1 (de) 1988-06-15
EP0157157A1 (fr) 1985-10-09
DE3562724D1 (en) 1988-06-23

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