Band-shaped machining tool having buffer particles

Abstract

A machining tool (1) includes a band-shaped tooth supporting body (2) and a plurality of teeth (3) each having a tooth tip (4) being covered with cutting particles (5) to form a plurality of geometrically undefined cutting portions. The tooth tip (4) is furthermore covered with buffer particles (6) of a different material than the cutting particles (5). The buffer particles (6) are located between the cutting particles (5).

Claims

1. A machining tool, comprising: a band-shaped tooth supporting body; and a plurality of teeth being arranged at the tooth supporting body, each tooth having a tooth tip, the tooth tip being covered with cutting particles to form a plurality of geometrically undefined cutting portions, and the tooth tip being furthermore covered with buffer particles of a different material than the cutting particles, the buffer particles being located between the cutting particles.

2. The machining tool of claim 1, wherein the cutting particles and the buffer particles are partly embedded in a metal layer.

3. The machining tool of claim 2, wherein the metal layer is a galvanic deposition layer or a chemical deposition layer.

4. The machining tool of claim 3, wherein the metal layer consists of metal that has deposited on the tooth tip as metal ions during galvanization or chemical metal deposition, the metal ions and the metal of the metal layer not being the buffer particles.

5. The machining tool of claim 4, wherein the metal is nickel, chrome or copper,

6. The machining tool of claim 1, wherein in the covered part of the tooth tip consists of between approximately 10% and 60% buffer particles.

7. The machining tool of claim 1, wherein the cutting particles and the buffer particles have approximately the same average size.

8. The machining tool of claim 7, wherein the average size of the cutting particles and the average size of the buffer particles is between approximately 60 and 800 μm.

9. The machining tool of claim 1, wherein the buffer particles have a lower hardness, and/or a lower heat resistance than the cutting particles.

10. The machining tool of claim 1, wherein the cutting particles include monocrystalline diamond (MCD), polycrystalline diamond (CVD-D), polycrystalline diamond (PCD), cubic bornitride (CBN), cutting ceramics, carbide or combinations thereof, and/or the buffer particles include monocrystalline diamond (MCD), polycrystalline diamond (CVD-D), polycrystalline diamond (PCD), cubic bornitride (CBN), silicon carbide, cutting ceramics, carbide, plastic, glass, ceramics, boron carbide, nickel, copper or combinations thereof.

11. The machining tool of claim 1, wherein the cutting particles include cubic bornitride (CBN) and the buffer particles include diamond, or the cutting particles include diamond, silicon carbide, plastic, glass, ceramics, boron carbide, nickel, copper or combinations thereof and the buffer particles include plastic, glass, ceramics, boron carbide, nickel, copper or combinations thereof.

12. The machining tool of claim 1, wherein the teeth are arranged at the tooth supporting body at a variable division.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In the following, the invention is further explained and described with respect to preferred exemplary embodiments illustrated in the drawings.

[0049] FIG. 1 illustrates a perspective view of a part of an exemplary embodiment of the new machining tool.

[0050] FIG. 2 illustrates a side view of the machining tool according to FIG. 1.

[0051] FIG. 3 illustrates a view of the machining tool according to FIG. 1 from above.

[0052] FIG. 4 illustrates a view of the machining tool according to FIG. 1 from the front.

[0053] FIG. 5 illustrates a tooth tip of a tooth of the machining tool according to FIG. 1 in a view from the front.

[0054] FIG. 6 illustrates the detail B of the tooth tip from FIG. 5.

[0055] FIG. 7 shows another illustration of a tooth tip of a tooth of the machining tool omitting most particles.

[0056] FIG. 8 illustrates the detail D of the tooth tip from FIG. 7.

DETAILED DESCRIPTION

[0057] FIG. 1-8 illustrate different views of an exemplary embodiment of a new machining tool 1. The machining tool 1 includes a tooth supporting body 2. In the present case, this is an elongated band-shaped machining tool 1 of which only a section is illustrated. It is to be understood that the machining tool 1 thus respectively extends further beyond the abruption lines shown in FIG. 1.

[0058] The machining tool 1 includes a plurality of teeth 3 being arranged at the tooth supporting body 2. The teeth 3 may be designed to be partly or fully integral with the tooth supporting body 2. In the present example, the teeth 3 are arranged at the tooth supporting body 2 with a constant division. However, they could also be arranged at the tooth supporting body 2 with a variable division.

[0059] The teeth 3 each include a tooth tip 4 facing away from the tooth supporting body 2. The tooth tip 4 is covered by (or equipped with) cutting particles 5 and buffer particles 6. The particles 5, 6 are only (partly) designated with reference signs in the enlarged illustrations of FIGS. 4-8 since they cannot be separately designated well in FIGS. 1-3 due to their small size.

[0060] The cutting particles 5 and the buffer particles 6 are fixedly arranged in a metal layer 7, and they are partly embedded in this metal layer 7. Thus, they partly protrude from the metal layer 7. The metal layer 7 especially is a galvanic deposition layer or a chemical metal deposition layer.

[0061] The cutting particles 5 and the buffer particles 6 differ with respect to their material and their functions to be fulfilled. It is herewith referred to the above-mentioned detailed explanations.

[0062] The cutting particles 5, the buffer particles 6 and the metal layer 7 commonly form a covering portion 8 which realizes the desired machining function of the machining tool 1 by including the cutting portions being required for this purpose. This covering portion 8 extends over the entire tooth tip 4 or a part of the tooth tip 4. This is the covered part of the tooth tip 4.

[0063] The arrangement of the cutting particles 5 and of the buffer particles 6 is to be especially well seen in FIG. 6. It is to be understood that this is no true to scale illustration and that the shape of the particles 5, 6 practically is different or may be different. The particles 5, 6 may also have approximately the same shape. The illustration intends to make it possible to differentiate the particles 5, 6 and to emphasize that, due to the arrangement of the buffer particles 6, one attains free spaces between the cutting particles 5. These free spaces would not exist or not to such an extent when only arranging cutting particles 5 as this is known in the prior art.

[0064] FIG. 8 is a symbolic illustration further emphasizing the distances between the cutting particles 5 that can be realized due to the buffer particles 6. It is to be seen by the illustrated distances b1, b2, b3, b4, c1, c2, c3 and c4 that the distances between the buffer particles 6 have different sizes and such substantial sizes preventing nests of cutting particles 5 from being formed.

[0065] Many variations and modifications may be made to the preferred embodiments of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of the present invention, as defined by the following claims.