JPH07323402A - Rotary saw blade - Google Patents

Abstract

PURPOSE:To prevent cutting dust from entering the area between a material to be cut and a rotary saw blade by forming a gradient which approaches the center of rotation gradually as a tooth bottom formed between cutting teeth of the disc base of the rotary saw blade used for cutting a wood material separating from the cutting face of the material to be cut, on the blade bottom part. CONSTITUTION:This rotary saw blade 10 is equipped with a rotating disc base 11 and cutting teeth 12 provided on the peripheral part of the base, and a gradient face 13a is formed on a tooth bottom 13 provided between the cutting teeth 12 of the base 11. In addition, the cutting tooth 12 is formed wider than the base 11 and further, is integrally provided with the base 11 by brazing. When being in a cutting step, cut pieces of a material to be W fractured by each cutting tooth 12 become chips and are guided into the tooth bottom 13 through a space between the cutting teeth 12. In addition, the chips are discharged in a direction where the gradient face 13a formed continuously on the tooth bottom 13 becomes separated from a cutting face C through the gradient face 13a. Thus the chips are prevented from penetrating into an area between the rotary saw blade 10 and the cutting face C of the material to be cut W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary saw blade used for cutting wood materials, inorganic materials or laminated materials thereof.

[0002]

2. Description of the Related Art Conventionally, as a rotary saw blade used for cutting wood materials, inorganic materials or laminated materials thereof, FIG.
A configuration as shown in (a) is known. This rotary saw blade 1 is provided at a base 2 which is moved relative to the work W and at an edge portion of the base 2 with a gap in the moving direction (a direction perpendicular to the paper surface in the illustrated example). And a plurality of cutting blades 3 formed therein.

Then, the base body 2 of the rotary saw blade 1 shown in FIG.
Is formed, for example, in a disk shape, and the cutting blades 3 are provided on the outer peripheral edge thereof, and the cutting blades 3 are formed.
A notch 4 for discharging chips and the like is formed therebetween. The bottom of the notch 4, that is, the blade bottom 4a is a surface that is substantially orthogonal to the cutting direction of the rotary saw blade 1 (indicated by arrow A in FIG. 1).

The rotary saw blade 1 thus constructed is continuously moved from the front side to the back side of the paper, and is gradually fed in the cutting direction (A) to cut the workpiece W. It is like this.

[0005]

However, in the conventional rotary saw blade 1 as described above, the following problems to be solved remain. That is, when the object W to be cut is cut by the rotary saw blade 1, the cutting waste is guided to the notch 4 while being broken by the rake face of the cutting blade 3, but is guided into the notch 4. The cutting debris enters between the cutting surface C of the work W and the rotary saw blade 1 and stays there, generating a resistance force that prevents the rotation of the rotary saw blade 1, resulting in cutting. This is a problem if not only the efficiency is lowered, but also the rotary saw blade 1 is meandered and the cutting surface C is roughened.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to suppress cutting chips generated during cutting from entering between the object to be cut and the rotary saw blade. It is intended to provide a rotary saw blade.

[0007]

In order to achieve the above-mentioned object, a rotary saw blade according to claim 1 of the present invention is a disk-shaped base body that is rotated relative to a work piece, and this base body. A rotary saw blade having a plurality of cutting blades provided at intervals in the rotation direction on the peripheral edge of the blade, the blade bottom portion formed between the cutting blades of the substrate, It is characterized in that an inclined surface that gradually approaches the center of rotation is formed as the distance from the cutting surface of the object increases.

[0008]

According to the rotary saw blade of the present invention, when the cutting by the cutting blade is started, the cutting waste is broken by the rake face of each cutting blade and is guided to the blade bottom portion between the adjacent cutting blades. Then, the cutting waste guided to the blade bottom portion moves toward the center of rotation while being guided along the inclined surface formed on the blade bottom portion. At this time, since the inclined surface is formed so as to gradually approach the center of rotation as it separates from the cutting surface of the workpiece, the cutting waste is guided in a direction away from the cutting surface.

[0009]

EXAMPLES An example of the present invention will be described below.
In the following description, the same parts as those in FIG. 1A are designated by the same reference numerals to simplify the description.

In FIG. 2, reference numeral 10 denotes a rotary saw blade according to the present embodiment. The rotary saw blade 10 has a disk-shaped base body 11 which is rotated relative to the workpiece W and the base body 1.
1 has a plurality of cutting blades 12 provided at intervals in the rotation direction thereof, and the workpiece W is provided on a blade bottom portion 13 formed between the cutting blades 12 of the substrate 11. As the distance from the cutting surface C is gradually increased, the inclined surface 13a gradually comes closer to the rotation center O.

Next, the details thereof will be explained. As shown in FIG. 1B, the cutting blade 12 is formed to be slightly wider than the thickness of the base body 11, and is brazed to the base body 11. Are provided integrally by. Then, in the state of being provided on the base body 11, the side edge positioned on the side of the workpiece W has the side edge of the base body 1 more than that of the other side edge.
It is provided so as to project from the side surface of 1.

This is a measure taken to reduce the cutting resistance between the cutting surface C of the workpiece W and the side surface of the base 11 after cutting by making the distance as large as possible. .

The rake face 12a of each of these cutting blades 12 is inclined at a predetermined angle (about 20 ° in this embodiment) with respect to the plane passing through the rotation center line.

Further, each blade bottom portion 13 has a rotary saw blade 10
The inner surface of the blade bottom portion 13 is formed in a substantially semi-circular shape that is open outward in the radial direction, and the inclined surface 13a is formed continuously over substantially the entire length of the inner peripheral edge of the blade bottom portion 13. In the present embodiment, the inclined surface 13a
By forming the cross-sectional shape of the blade bottom portion 13,
As shown in FIG. 1 (b), the rotary saw blade 10 has a sharp shape outward in the radial direction.

Next, the operation of this embodiment thus constructed will be described. The rotary saw blade 10 is used by being attached to a rotary drive device such as an electric motor.
First, the rotary saw blade 10 is aligned along the cutting line of the workpiece W, and then rotated in a predetermined direction as shown by an arrow T in FIG.

This rotary saw blade 10 is moved in the radial direction of rotation at a predetermined speed and cut into the workpiece W while keeping the rotation thereof as indicated by an arrow A in FIG.

As a result, the work W is cut, and in such cutting, the cut pieces of the work W are broken by the cutting blades 12 to form cutting scraps. It is guided to the blade bottom 13 through the notches between the cutting blades 12.

The cutting chips guided to the blade bottom 13 are guided by the inclined surface formed continuously with the blade bottom 13 as shown by an arrow F in FIG. It is discharged in a direction away from the surface C.

Thus, during cutting, cutting debris is prevented from entering between the rotary saw blade 10 and the cutting surface C of the object W to be cut. Therefore, the base body 11 of the rotary saw blade 10
It is possible to suppress an increase in frictional resistance between the two due to the intrusion of foreign matter between the cutting target W and the work W, and as a result, it is possible to reduce the cutting resistance.

Further, by reducing the cutting resistance between the rotary saw blade 10 and the object W to be cut, the rotary saw blade 10 is prevented from meandering, the cutting accuracy is improved and the smoothness of the cutting surface C is improved. Is increased. Further, since the amount of foreign matter (cutting dust) entering between the base 11 and the workpiece W is reduced, the roughening of the cutting surface C is prevented.

Thus, the rotary saw blade 10 according to this embodiment
According to the method, the cutting resistance is small and the cutting surface can be cut cleanly. In particular, when cutting a laminated material or the like laminated with an adhesive agent, the adhesive agent having stickiness is suppressed from penetrating between the rotary saw blade 10 and the material W to be cut. The reduction effect becomes remarkable.

The shapes and sizes of the constituent members shown in the above embodiment are merely examples, and can be variously changed based on the type of the object to be cut, design requirements, and the like.

[0023]

As described above, the rotary saw blade according to the present invention has a disk-shaped base body which is rotated relative to the object to be cut, and a peripheral edge portion of the base body with a space in the rotation direction. A rotary saw blade having a plurality of cutting blades provided with, in the blade bottom portion formed between the cutting blades of the substrate, according to the distance from the cutting surface of the workpiece, gradually, It is characterized in that an inclined surface that approaches the center of rotation is formed, and has the following excellent effects.

The cutting debris guided to the bottom of the blade by cutting is discharged by the inclined surface in a direction away from the cutting surface of the object to be cut, whereby during cutting, the cutting debris is generated between the rotary saw blade and the cutting surface. Can be suppressed.
As a result, it is possible to suppress an increase in frictional resistance between them and reduce cutting resistance.

Further, since the cutting resistance between the rotary saw blade and the workpiece W is reduced, the rotary saw blade can be prevented from meandering, the cutting accuracy can be improved, and the smoothness of the cutting surface can be improved. The cutting surface can be prevented from being roughened by reducing the amount of foreign matter (cutting dust) entering between the substrate and the object to be cut. Therefore, the cutting resistance is small, and the cut surface can be cut cleanly.

[Brief description of drawings]

FIG. 1A is a vertical cross-sectional view showing a main part of a conventional rotary saw blade, and FIG. 1B is a vertical cross-sectional view showing a main part of a rotary saw blade according to an embodiment of the present invention. FIG. 3 is a sectional view taken along line BB in FIG. 2).

FIG. 2 is a side view with a part of a rotary saw blade according to an embodiment of the present invention omitted.

[Explanation of symbols]

 10 Rotating Saw Blade 11 Base 12 Cutting Blade 12a Rake Surface 13 Blade Bottom 13a Sloping Surface

Claims (1)

[Claims] 1. A rotary saw blade provided with a disk-shaped base body that is rotated relative to an object to be cut, and a plurality of cutting blades provided in a peripheral portion of the base body at intervals in the rotation direction thereof. Is, according to the blade bottom portion formed between the cutting blades of the substrate, away from the cutting surface of the workpiece,
A rotary saw blade, which is characterized in that an inclined surface is formed so as to gradually approach the center of rotation.