JPH1043941A - Tip saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate chips from staying in recessed parts of a waveform tooth, and perform cutting at high speed in small cutting resistance by quickly scattering the chips generated by cutting. SOLUTION: In this tip saw, and in a circular tip saw having on the peripheral edge a waveform tooth by repetition of directional projecting parts 1... whose tips are sharply projected and recessed parts 2..., inclined notches 4, 4'... having a prescribed width are altenately formed on left and right side surfaces of the tip saw along the recessed parts 2. The inclined notches 4, 4'... are formed in their slant attitude so that its thickness becomes gradually thin toward a ridgeline of the recessed parts 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw having a large number of corrugated teeth on the periphery thereof, and more particularly to a chip saw mainly used for cutting wood or resin.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a tip saw of this kind has a corrugated tooth 13 formed at the periphery by repeating a directional convex portion 11 and a concave portion 12 having a sharp tip. At the cutting end of the tooth 13, a cemented carbide 14 is embedded and formed.

[0003]

Although this conventional tip saw can sufficiently cope with ordinary rotation of ordinary wood by cutting, it is difficult to cut hard wood or resin at high speed. The scattering of the powder was not sufficient, and there was a risk that seizure or blade spillage might occur.

[0004] Therefore, the present invention mainly provides a tip saw that allows cutting chips generated by cutting to be quickly scattered and does not stay in recesses of corrugated teeth, thereby enabling high-speed cutting with a small cutting resistance. It is the purpose.

[0005]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the tip saw according to the present invention, when viewed from the side, a circular tip saw provided with corrugated teeth 3 on the periphery by repeating a directional convex portion 1... The inclined cuts 4, 4 ′ having a predetermined width are formed along the concave portion 2.
Are formed alternately on the left and right side surfaces of the tip saw, and the inclined cuts 4, 4 ′ are formed so as to be inclined so that the thickness thereof gradually decreases toward the ridge line of the concave portion 2. is there.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an embodiment of a circular tip saw according to the present invention, in which, when viewed from the side, corrugated teeth formed by repetition of directional convex portions 1... 3 are provided on the peripheral edge, and the cemented carbide 5 is embedded in the tip of the corrugated tooth 3 on the cutting side, and a sharp protruding blade 5a is formed at the tip.

Further, inclined notches 4, 4 '... Of a predetermined width are formed alternately on the left and right side surfaces of the tip saw along the concave portion 2. That is, as shown in FIG. 2, the inclined cuts 4, 4 'are formed alternately on the left and right side surfaces. The inclined cuts 4, 4 '...
Is formed so as to gradually decrease its thickness toward the ridge line 2a. The inclined cuts 4 and 4 '
Is preferably formed so that its upper end is connected to the cemented carbide 5 as shown in FIG. Incidentally, reference numeral 6 in the drawing denotes a mounting hole for mounting on a machine.

In the tip saw constructed as described above, the cutting powder sent to the concave portion 2 at the time of cutting is formed so as to be inclined so that its thickness gradually decreases toward the ridge line 2a of the concave portion 2. Due to the inclined cuts 4 and 4 ′, the chips are quickly scattered to the outside, so that chips do not stay in the concave portion 2, and high-speed cutting can be performed with a small frictional resistance. In addition, since the flow of the chips flows from the cemented carbide cutting edge 5a along the inclined cuts 4 and 4 'as shown by arrows in FIG. 2, the chips are swiftly scattered.

In the present invention, dimensions such as the width and the inclination angle of the inclined cuts 4 and 4 'are set according to the material of the workpiece. The tip saw of the present invention is not limited to wood and resin, but can be applied to a tip saw for cutting metal.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but has the constitutional requirements of the present invention and has the above object. As long as it achieves and has the following effects, it can be appropriately modified and carried out.

[0011]

Since the tip saw of the present invention is constructed as described above, chips generated by cutting can be quickly scattered from the inclined cuts, so that chips do not stay in the concave portions of the corrugated teeth. Therefore, there is a remarkable effect that the cutting resistance is reduced, and quick cutting by high-speed rotation can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a tip saw according to the present invention.

FIG. 2 is an enlarged side view of a corrugated tooth portion of the tip saw.

FIG. 3 is an enlarged sectional view taken along the line AA in FIG. 2;

FIG. 4 is a partial side view showing a conventional tip saw.

[Explanation of symbols]

 Reference Signs List 1 convex part 2 concave part 3 corrugated tooth 4, 4 'inclined cut

Claims (1)

[Claims] 1. A corrugated tooth formed by repeating a directional convex portion (1) and a concave portion (2) having a sharp tip when viewed from the side.
In a circular tip saw provided with (3) on the periphery, inclined notches (4), (4 ')... Having a predetermined width are formed alternately on the left and right side surfaces of the tip saw along the concave portion (2). Cut
(4), (4 ′)... Are tip saws that are formed so as to gradually decrease in thickness toward the ridge line of the concave portion (2).