JP2001129722A - Saw blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saw blade capable of reducing the generation of unstraight cutting and elongating the life. SOLUTION: A cemented carbide chip 5 mounted on a tip of the highest teeth acts first in cutting a matter to be cut, and is worn in accompany with the cutting. When the chip 5 is worn, only the worn chip 5 is demounted, and then a cemented carbide chip 5 of the next highest teeth newly acts to execute the cutting. As a height of the teeth after the demounting of the chip 5 is lowered, the teeth is not contacted with the matter to be cut. The marking 9 is provided for preventing the mistake in the order of breakage when the chips 5 are successively demounted in order of heights, and the demounting is executed in accordance with the marking 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a saw blade, and more particularly to a saw blade for cutting difficult-to-cut materials.

[0002]

2. Description of the Related Art In recent years, pre-hardened steels which are subjected to heat treatment at the stage of a material in order to shorten a process are increasing, and it can be said that the pre-hardened steels are hard and difficult to cut. When cutting such difficult-to-cut materials, a band saw machine may be used.

[0003]

However, in cutting such difficult-to-cut materials, there is a problem that the teeth of the band saw blade are severely worn and the life of the saw blade is short. That is, as the tooth tip wears out, the bending and the cut surface roughness deteriorate,
Alternatively, there is a problem that the burrs increase and cannot be used.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a saw blade capable of suppressing the occurrence of bending and extending the life. is there.

[0005]

To achieve the above object, a saw blade according to the first aspect of the present invention is provided with a carbide tip which can be removed by breaking at a tooth tip for cutting a work material, A saw blade group including a plurality of types of teeth whose height difference is equal to or less than the height of the removable carbide tip and equal to or greater than the cut amount is provided.

Accordingly, when cutting a work material, a carbide tip provided at the tip of the highest tooth works first, and the lower teeth are lower than the higher teeth by a depth equal to or greater than the cutting depth. Do not touch. Since the tall teeth wear with cutting, if only the worn carbide tips are removed, the next highest toothed carbide tip will be the highest and will cut. At this time, the tooth from which the cemented carbide tip has been removed does not come into contact with the work material because the tooth height is lower than the above-described next higher tooth.

According to a second aspect of the present invention, in the saw blade according to the first aspect, the saw blade group includes a high tooth group composed of high teeth having a high tooth height and a low tooth having a low tooth height. And a low-tooth group configured as described above.

Therefore, when only the worn carbide tips are removed in a high tooth group having a high tooth height such as a straight tooth and a low tooth group having a low tooth height such as a set tooth, the following occurs in each group. A high-tipped carbide tip acts on the blade to cut.

A saw blade according to a third aspect of the present invention is the saw blade according to the first aspect, wherein a marking indicating a break order is provided near the cemented carbide tip.

Therefore, when removing the cemented carbide chips in order of height of the teeth, the carbide chips are removed in accordance with the marking so as not to mistake the break order.

A saw blade according to a fourth aspect of the present invention is the saw blade according to the third aspect, wherein the marking is a notch for facilitating breakage.

Therefore, by removing the cemented carbide tip at the location of the notch, it is possible to easily remove the cemented carbide tip without mistaking the order.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an example of a band saw blade BS as a saw blade according to the present invention. In the band saw blade BS, since the trunk is structurally weak, if a suitable cut is made on all the teeth 1A, 1B, 3A3B, particularly when cutting a difficult-to-cut material, cutting may occur. For this reason, the number of effective teeth at the time of cutting is reduced, the cutting force is reduced, and the occurrence of bending is suppressed.

As shown in FIG. 1, the band saw blade B
S has a carbide tip 5 at the tip of the tooth, for example, a high tooth group 7 composed of high teeth 1A and 1B such as straight teeth, and a low tooth height such as a set tooth. And a low tooth group 9 including teeth 3A and 3B.

As the high tooth group 7, a plurality of (two in FIG. 1) high teeth 1A and 1B having different tooth heights are provided, and the high tooth 1A has a tooth height ΔH1 (for example, about (About 0.2 mm).

Similarly, as a low tooth group 9, a plurality of (two in FIG. 1) low teeth 3A, 3
B is provided, and the tooth height of the low teeth 3A is higher than that of the low teeth 3B by Δh1 (for example, about 0.2 mm). Here, in the case of set teeth, only the tooth height is a problem for set teeth having the same amount of protrusion in the same direction. Therefore, in the case where the swinging direction and the swinging amount are different, it can be considered as another group.

By configuring the band saw blade BS in this manner, the cut amount per tooth is about 0.01 mm to 0.05 mm.
mm, high teeth 1A during cutting
Only the low teeth 3A work effectively, and the high teeth 1B and the low teeth 3B play without contacting the work material. Thereby, the effective teeth at the time of cutting are the high teeth 1A and the low teeth 3A, and the number of teeth is halved, so that the generation of the cutting component force is reduced.

Then, with the cutting, the high teeth 1A and the low teeth 3A
If the wear gradually increases and the bending exceeds a preset reference value, the operator breaks and removes the carbide tip 5 having the high teeth 1A and the low teeth 3A with pliers or the like.

As a result, the tooth heights of the high teeth 1A and the low teeth 3A are lower than those of the high teeth 1B and the low teeth 3B, so that the high teeth 1B and the low teeth 3B, which have not been effective, work effectively. .

From the above results, the high tooth 1A and the low tooth 3A
Is working effectively, the high teeth 1B and the low teeth 3B, which are about 0.2 mm lower in height than the high teeth 1A and the low teeth 3A, do not come into contact with the work material and are not worn out.
After removing the cemented carbide tips 5 of the high teeth 1A and the low teeth 3A, the high teeth 1B and the low teeth 3B are as if they were new band saw blades B.
Since it works like S, the occurrence of bending can be suppressed. Further, the life of the band saw blade BS is doubled.

It should be noted that the present invention is not limited to the above-described embodiment of the present invention, but by making appropriate changes,
It can be implemented in other aspects. That is, in the above-described embodiment, the band saw blade BS as the saw blade has been described, but the present invention can be applied to a saw blade other than the band saw blade BS.

Further, in the above-described embodiment, the high tooth group 7 and the low tooth group 9 are formed with two teeth having different tooth heights.
The case where the high tooth group 1A and the low tooth group 3A and the low tooth 3A and the low tooth group 3B are used has been described. You may. In this case, cutting can be performed three times, four times,....

As shown in FIG. 2, in order to facilitate removal of the carbide tip 5 and to prevent the removal of the carbide tip 5 having the high teeth 1B and the low teeth 3B by mistake. It is preferable that a notch 11 be provided as a marking on the surface. By breaking the carbide tip 5 at the notch 11, the carbide tip 5 can be easily removed without making a mistake in the order.

At this time, the height of the carbide tip 5 to be removed (if the notch 11 is provided, the notch 1
As shown in FIG. 2, it is necessary to take a value larger than the difference ΔH1 between the high teeth 1A and 1B and the difference Δh1 between the low teeth 3A and 3B. Therefore, when the teeth 1 and 3 constituting the high tooth group 7 or the low tooth group 9 are three or more types having different tooth heights, H> ΔH1 + ΔH2
+,..., H> Δh1 + Δh2 +.

[0026]

As described above, in the saw blade according to the first aspect of the present invention, when cutting the work material, the carbide tip provided at the tip of the highest tooth works first, and the cutting is performed. Wear with. If worn, only the worn carbide tip is removed, and the next highest toothed carbide tip acts to cut it, so it can be cut again like a new saw blade and reduces the occurrence of bending In addition, the life can be extended.

In the saw blade according to the second aspect of the present invention, when only the worn carbide tips are removed in the high tooth group and the low tooth group, the carbide tip having the next highest tooth acts in each group. Cutting can be done.

In the saw blade according to the third aspect of the invention, when the carbide tips are removed in ascending order of tooth height, the carbide tips are removed in accordance with the marking, thereby preventing the breakage order from being incorrect.

In the saw blade according to the fourth aspect of the invention, the carbide tip can be easily removed by removing the carbide tip at the location of the notch.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a saw blade according to the present invention.

FIG. 2 is an example of a notch provided on a tooth tip.

[Explanation of symbols]

 1A, 1B High tooth (tooth) 3A, 3B Low tooth (tooth) 5 Carbide tip 7 High tooth group (saw blade group) 9 Low tooth group (saw blade group) 11 Notch (marking) BS band saw blade (saw blade)

Claims (4)

[Claims] 1. A cutting tip for cutting a workpiece is provided with a carbide tip that can be removed due to breakage, and the height difference of the tooth tip is equal to or less than the height of the removable carbide tip and equal to or greater than a cutting depth. A saw blade comprising a saw blade group including a plurality of types of teeth. 2. The method according to claim 1, wherein the saw blade group includes a high tooth group composed of high teeth having a high tooth height and a low tooth group composed of low teeth having a low tooth height. The saw blade according to claim 1. 3. A marking indicating the order of breakage is provided in the vicinity of said carbide tip.
The described saw blade. 4. The saw blade according to claim 3, wherein the marking is a notch for facilitating breakage.