WO1995008412B1

WO1995008412B1 - Forming cutter

Info

Publication number: WO1995008412B1
Application number: PCT/DE1994/001111
Authority: WO
Filing date: 1994-09-16
Publication date: 1995-05-11

Abstract

The invention relates to a forming cutter for making grooves, especially in non-metallic materials, with a shaft at the end of which there are regularly angularly spaced cutters having at least one peripheral and one face bezel. Prior art forming cutters have the drawback that only one bezel engages with the material of the workpiece at a time, giving rise to irregular cutting forces, uneven running and rapid wear. The feed rate is also relatively low. The invention obviates these drawbacks in that there are at least three bezels (2) at the end of the shaft (1) and the face bezels (7) are at an angle α1 to the radial direction of the forming cutter so that all the face bezels (7) lie substantially on a concave wedge surface. The forming cutter is designed for both clockwise and anticlockwise-rotating machines, in which the bezels and the face bezels for anticlockwise machines are mirror images of those for clockwise machines.

Claims

AMENDED CLAIMS [received by the International Bureau on 30 March 1995 (30.03.95); original claims 1 and 2 deleted; original claims 3-15 replaced by amended claims 1-14 (4 pages)]

1. Form milling cutters for producing grooves, in particular in non-metallic materials such as wood or plastic, with a cutter shank, at the end of cutting bodies are arranged at regular angular intervals to each other, each having at least one peripheral cutting edge and a Stirn¬, with at the end of Milling shank angeord¬ Neten at least three cutting bodies, wherein the stim¬ cut an angle cq to the radial direction of the Formfrä¬ sers have, so that all the cutting edges (7) Chen lie substantially on a concave conical surface,

characterized,

in that a first peripheral cutting section (5 ', 25') with a small cutting radius is provided and at least one second peripheral cutting section (18 ', 18' ', 25' ', 25' '') between the end cutting edges (7) and the first circumferential section (5 ') is provided, wherein the cutting edges of the second peripheral cutting portions (18', 18 '', 25 '', 25 '' ') in the direction of the form milling cutter axis or in a sol¬ Chen angle to this, that they in the direction Incisors run obliquely inwards.

2. Molding cutter according to claim 1, characterized in that the second peripheral cutting portion (18 ', 18'',25'') at least partially has a larger cutting radius than the first peripheral cutting portion (5').

3. Molding cutter according to claim 1 or 2, characterized gekenn¬ characterized in that two stepped oblique Umfangsschneidenab¬ sections (18 ', 18' ') are provided.

4. Molding cutter according to at least one of the preceding claims, characterized in that the cutting body (2) and the cutter shank (1) are integral with one another verbun¬.

5. Molding cutter according to at least one of the preceding claims, characterized in that the clearance angle _ of the cutting edges (7) at least 7 °, preferably 15 °, be¬ contributes.

6. Molding cutter according to at least one of the preceding

Claims, characterized in that the clearance angle αg of the peripheral cutting edges (5) is 30 ° to 60 °, preferably 45 °.

7. Molding cutter according to at least one of the preceding An¬ claims, characterized in that the free surface (4) of the peripheral cutting edges (5) angled or curved.

8. Molding cutter according to at least one of the preceding claims, characterized in that the radius of the cutter shaft (1) is at least as large as the cutting radius of the cutting edges (7).

9. Molding cutter according to claim 6, characterized in that at both ends of the cutter shaft (1) at least three cutting body (2) are arranged.

10. Molding cutter according to at least one of the preceding An¬ claims, characterized in that the diameter of the cutter shank (1) 6 mm, the cutting radius of Sti schnei¬ the (7) 3 mm, the cutting radius of the inner Umfangsschnei¬ denabschnitte (5 ') 1.4 mm and the angle of the oblique peripheral cutting portions (5 '') to the axial direction is 30 °.

11. Molding cutter according to at least one of the preceding claims, characterized in that it consists of a hard metallic material, for example Widia steel, Hartme¬ tall or sintered metal.

12. Molding cutter according to at least one of the preceding claims, characterized in that in each cutting body (2) on the inner peripheral cutting portion (5 ') on the oblique peripheral cutting portion (5'') opposite side of a curved Umfangsschnei¬ denabschnitt (5''') connects.

13. Molding cutter according to at least one of the preceding claims, characterized in that those are provided for rechtsdre¬ rising and for left-handed machines.

14. Molding cutter according to at least one of the preceding claims, characterized in that in cutters for left-handed machines, the cutting body and the Sti ¬ cutting mirror images of a cutter for rechts¬ rotating machines are arranged.

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