JPH0768502A - Woodworking rotary cutter - Google Patents

Abstract

PURPOSE:To provide a woodworking rotary cutter having a high cutting effi ciency in which a finish polishing can be conducted without much labor. CONSTITUTION:A rotary cutter has a carbide tip 10 fixed to an end of a protrusion 2 formed on an outer periphery of a disc-like body, wherein the tip 10 is formed substantially in a quadrangular pyramidal shape at a body and formed at an end in an oblique surface lowered from a front surface toward a rear surface with a groove 15 formed on an entire length and width of the surface and a pair of cutting edges 16, 16a formed at ends of the front surface of the tip 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary blade mainly used for cutting wood such as plywood and integrated materials.

[0002]

2. Description of the Related Art A rotary blade of this type, as shown in FIG.
A large number of serrated protrusions 2 are provided on the outer circumference of the disc-shaped body 1,
The carbide tip 3 is fixed to the tip of the protrusion 2.

The cemented carbide tip 3 is usually a molded article of ceramics, and after being brazed to the tip of the protrusion 2,
The shape is adjusted by polishing. That is, as shown in FIGS. 7 and 8, the sharp edges 3a and 3b of the tip 3 are ground so that they are alternately arranged. And the cutting edge 3
The flanks 3c and 3d that follow a and 3b are sloped surfaces, in which the chain line portions are removed and the disk-shaped main body 1 descends in both the circumferential direction and the axial direction.

[0004]

However, the cutting edges 3a, 3b as described above are not provided.
Alternately forming the flanks 3c and 3d on the tip of the cemented carbide tip 3 is a very laborious process and the work efficiency is poor.

Further, the cutting efficiency of the rotary blade is not always good only by providing the carbide tip.

[0006] Therefore, an object of the present invention is to provide a rotary blade which does not take much time for finish polishing and has high cutting efficiency.

[0007]

In order to solve the above problems, the present invention relates to a rotary blade in which a cemented carbide tip is fixed to the tip of a protrusion provided on the outer circumference of a disk-shaped body, wherein the cemented carbide tip has a body portion of approximately four. It has a prismatic shape with a tip that descends from the front surface to the rear surface, and a groove of the same width as that width is provided in the slope from the front surface of the chip to the rear surface, and a pair of cutting edges is formed at the tip of the front surface of the chip. It is characterized by

[0008]

[Operation] Since the tip of the tip fixed to the tip of the protrusion of the disk-shaped main body is recessed by the groove, both side surfaces of the tip are polished to adjust the shape of the tip to sharpen and align the cutting edge. Just enough.

Further, since one chip has a pair of cutting edges, the cutting efficiency is good.

Further, at the time of repairing, it is not troublesome since only the side surface of the chip needs to be polished.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawings, the cemented carbide chip 10 according to the present invention is made of a sintered body of metal oxide such as WC cemented carbide, carbide, nitride, etc., so-called ceramics. 11a is slightly tapered downward, but it is almost a square pole as a whole, and the upper end is the front surface 1
The slope 14 is downward from 2 to the rear surface 13. Grooves 15 are formed over the entire length and width of this bevel, and the upper ends of the groove 15 have sharp cutting edges 16, 16a.
It has become. The cross-sectional shape of the groove 15 can be variously selected, such as a truncated circle shape as shown in FIG. 2, a triangular shape as shown in FIG. 3, and a trapezoidal shape as shown in FIG.

A vertical groove 17 is formed on the rear surface of the chip 10. This vertical groove 17 is a disk-shaped main body 1 of the rotary blade.
It is provided to fit the front surface 4 of the projection 2 and braze firmly.

After brazing the tip 10, the tip 10 is aligned with respect to the center of the disc-shaped body 1 and the cutting blade 1
In order to make 6 and 16a sharp, both sides 1 of the chip 10
1 and 11a are polished and, if necessary, the front surface 1 of the chip 10
Polish 2 slightly.

Although the chip 10 according to the present invention may be attached to the entire circumference of the disk-shaped main body 1, for example, chips having flat ends, that is, no grooves 15 may be arranged every several chips. As a result, the remaining ridge-shaped portions cut by the cutting edges 16 and 16a can be dredged.

[0016]

As described above, according to the present invention, since a pair of cutting edges is provided at the upper end of the cemented carbide tip, there is an effect that the cutting efficiency is improved.

Further, after brazing the cemented carbide tip to the disc-shaped body, it can be shaped simply by polishing the side surface, so that finishing is not troublesome and re-polishing after blunting the cutting edge is easy. Is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rotary blade according to the present invention.

[Fig.2] Rear view of carbide tip of rotary blade

FIG. 3 is a rear view showing another example of the above.

FIG. 4 is a rear view showing still another example of the above.

FIG. 5 is a partial front view of the rotary blade.

FIG. 6 is a front view showing a conventional rotary blade.

FIG. 7 is a partially enlarged perspective view of a conventional rotary blade.

FIG. 8 is a side view of a conventional rotary blade.

[Explanation of symbols]

 1 Rotating Blade 2 Protrusion 3 Carbide Tip 3a, 3b Blade Edge 3c, 3d Flank Surface 4 Front Surface of Protrusion 10 Carbide Tip 11, 11a Side 12 Front 13 Rear 14 Slope 15 Groove 16 16a Blade 17 Longitudinal Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirotoshi Ishii 1-9 Kitatakeya-cho, Amagasaki-shi, Hyogo (72) Inventor Yoshimichi Ishii 1-2-7 Komatsu-minami-cho, Nishinomiya-shi, Hyogo

Claims (1)

[Claims] 1. A rotary blade in which a cemented carbide tip is fixed to the tip of a protrusion provided on the outer circumference of a disk-shaped body, wherein the body of the cemented carbide tip has a substantially quadrangular prism shape, and the tip descends from the front surface to the rear surface. A rotary blade for woodworking, which has an inclined surface, and a groove having the same width as that of the inclined surface is provided from the front surface of the chip toward the rear surface, and a pair of cutting edges is formed at the tip of the front surface of the chip.