JPH06717A - Saw blade - Google Patents

Abstract

PURPOSE:To perform effective curling of a chip produced by a saw tooth having a high depth of cut and a high tooth height by bringing inclination of the chip induction surface of the saw tooth having a high tooth height into a comparatively steep state. CONSTITUTION:Inclination of the chip induction surface 15 of each of saw teeth 3, 7R, and 9L with a high tooth height is brought into a steep state. This constitution causes effective curling of a chip 27 produced by the saw teeth 3, 7R, and 9L having a high depth of cut and a high tooth height. Reversely, inclination of the chip induction surface 21 of saw teeth 5L and 11R having a low tooth height is brought into a gentle state. This constitution causes effective curling of a chip 29 produced by the saw teeth 5L and 11R having a low depth of cut and a low tooth height. As a result, production of chips exercising an adverse influence on a saw blade on a whole is reduced, an increased life for a saw blade is provided, and chip disposal after cutting is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band saw, a circular saw, and other saw blades used for metal cutting.

[0002]

2. Description of the Related Art Conventionally, in a band saw, as shown in FIGS.
A saw blade having a saw tooth having a height difference as shown in (d) and a rake face having saw teeth of various shapes is known, but a saw blade having a chip guide surface on the saw tooth is not known. .
In the saw blade of a circular saw, Japanese Patent Laid-Open No. 52-133193
As described in Japanese Patent Publication No. JP-A-2003-264, there is known a saw tooth having a chip guiding surface.

[0003]

However, in the conventional saw blade of the band saw having a height difference in the saw teeth, the rake face has a shape which is substantially the same as that of the saw tooth having a high tooth height and the saw tooth having a low tooth height. , There were the following problems. That is, in the saw blade having a height difference in the saw tooth, the cut of the saw tooth with a high tooth depth is deeper than the cut of the saw tooth with a low tooth height, and the lower side of the surface layer that has undergone work hardening in the cutting of work hardenable materials It has the advantage of improving the cutting performance by scraping off, and it is possible to curl and eliminate chips with a saw tooth that has a large tooth height and can be deeply cut, but on the other hand, with a saw tooth with a low tooth height, chips are less likely to curl There was a problem that caused trouble.

Therefore, in order to solve such a problem, it is conceivable to provide a chip guide surface on each rake face of each saw tooth as described in JP-A-52-133193. If the chip guiding surface has the same shape regardless of the height difference of the saw teeth, the following problems occur. That is, in order to generate curled chips from a saw tooth with a low tooth height, if a chip guide surface with a large rake angle and a gentle slope is provided on the saw tooth, the cutting amount is large in the saw tooth with a high tooth height and the cutting depth is large. The gullet becomes smaller than the amount, which may cause clogging,
Conversely, if a rake angle is small and a chip guide surface with a steep slope is provided to generate a large curled chip with a saw tooth with a large tooth height, the chip does not curl with a saw tooth with a low tooth height, and as described above, There is a problem in that processing is likely to cause trouble.

The present invention has been made in view of such a technical problem, and the shape of the chip guiding surface is changed between the tooth having a high tooth height and the tooth having a low tooth height depending on the action thereof, and the saw tooth having any height. It is an object of the present invention to provide a saw blade capable of effectively generating curled chips and reducing clogging and troubles in chip disposal.

[0006]

The saw blade of the present invention is a saw blade having a saw tooth having a height difference and a rake face having a chip guiding surface, and the inclination angle is relatively steep for a saw tooth having a high tooth height. The chip guiding surface is provided so that the saw tooth having a low tooth height is provided with the chip guiding surface such that the inclination angle is relatively gentle.

[0007]

In the saw blade of the present invention, by providing the saw teeth with a height difference, the cutting depth of the saw teeth having a high tooth depth is deeper than that of the saw teeth having a low tooth height, and work hardening occurs in the cutting of a hard-to-work material that is hard to work. It has the advantage of improving the cutting performance by scraping off the part below the surface layer.In addition, in a saw tooth with such a difference in height, by making the slope of the chip guiding surface of the saw tooth with a high tooth height steep, The chips generated by the large-height saw teeth with high tooth height can be effectively curled, and conversely, the inclination of the chip guide surface of the saw teeth with low tooth height can be made gentle to reduce the tooth depth with small cutting depth. The chips generated by the saw teeth can also be effectively curled, the generation of fine chips that adversely affect the saw blade as a whole is reduced, the life of the saw teeth is increased, and the chip disposal after cutting is simplified.

[0008]

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

FIG. 2 shows an embodiment in which the present invention is applied to a saw blade of a band saw, and the saw blade 1 has a large number of saw teeth on one side of its body. The saw blade 1 includes a saw tooth group having a plurality of saw teeth 3, 7R and 9L having a high tooth height and a saw tooth group having a plurality of saw teeth 5L and 11R having a low tooth height. The tooth height of the saw blade may be set to three types of high, medium, and low, or more types.

Explaining the set-out of the saw tooth, the saw-tooth 3 is a straight tooth that does not perform the set-out on the left and right, the saw-tooth 7R and 11R are the right set-tooth that is set to the right-set, and the saw-tooth 5L and 9L are set to the left-set. This is the left set tooth that was made. Further, among the right set teeth, the saw tooth 7R having a high tooth height has a smaller set-out amount than the saw tooth 11R having a low tooth height, and among the left set teeth, the saw tooth 9L having a high tooth height is the saw tooth 5L having a low tooth height.
The amount of short-necked clams is smaller than that.

Therefore, when the material W to be cut is cut by the saw blade 1 having such a tooth height difference, a large cutting amount is realized by the saw teeth 3, 7R, 9L having high tooth height,
Further, the saw teeth 5L and 11R having a low tooth height are used to cut with the widths of the set-out widths M and N which are outside the saw tooth having a high tooth height. In this way, the saw tooth with a high tooth height can realize a sharp sharpness that is not affected by work hardening by cutting a deeper part than a work hardened layer even if a work hardened layer is generated due to the large cutting amount, Due to the large setout amount of the saw-tooth pixel with a low tooth height, it is possible to suppress bending at the time of cutting, and it is possible to perform cutting with a sharp sharpness and good linearity.

In the saw blade 1 having such a tooth height difference, as shown in FIG. 1A, the saw teeth 3, 7R, 9L having a high tooth height have the rake face 13 at the tip of the tooth.
The chip guide surface 15 formed so as to be continuous with is made to have a relatively steep inclination, and the gullet 17 is formed at the lower end thereof. Further, as shown in FIG. 1 (b), the saw tooth 5L having a low tooth height,
For 11R, the chip guiding surface 21 formed so as to be continuous with the rake surface 19 of the tooth tip has a relatively gentle inclination, and the gullet 23 is formed at the lower end thereof.

Chip guiding surfaces 15 having different inclination angles,
By forming 21, when the workpiece W is cut, the cutting guide surface 15 of each of the saw teeth 3, 7R, 9L having a high tooth height has a large cutting amount of these saw teeth 3, 7R, 9L. The chip 27 has a large curl, and conversely, on the chip guide surface 21 of each of the saw teeth 5L and 11R having a low tooth height, the cutting amount of each of these saw teeth 5L and 11R is small, but the chip 29 also has a small curl, both of which are gullets. 1
It is discharged without being collected in 7,23.

Actually, as shown in FIG. 3, the saw teeth having a steep inclination of the chip guiding surface are saw teeth 3, 7R, 9L of the embodiment of the present invention.
The saw tooth having a gradual inclination of the chip guiding surface as shown in FIG. 4 is used as the saw tooth 5L, 11 having a low tooth height of the embodiment of the present invention.
When applied to R, when SKD61φ250 was cut with this saw blade at a saw speed of 50 m / min and a cutting rate of 50 cm ² / min, most of the chips were curled and good chips were discharged to achieve a long life of the saw blade. .

In contrast, all the saw teeth of the saw blade are shown in FIG.
The saw blade to which the tooth profile shown in FIG. 4 was applied could not produce curled chips well, and the saw blade to which the tooth profile in FIG. 4 was applied had a problem of chipping due to clogging.

[0016]

As described above, according to the present invention, by providing a height difference in tooth height, it becomes possible for a saw tooth having a high tooth height to cut into a portion deeper than the work hardened layer and to cut with good sharpness. Although it can be realized, by making the inclination of the chip guide surface of the saw tooth having a high tooth height relatively steep, the chips generated by the saw tooth having a large cutting depth and a high tooth height can be effectively curled. On the contrary, by gently sloping the chip guide surface of the saw tooth with a low tooth height, the chips generated by the saw tooth with a small tooth depth and a low tooth height can be effectively curled, which adversely affects the saw blade as a whole. It is possible to reduce the generation of fine chips, which can affect the life of the saw teeth and simplify the chip treatment after cutting.

[Brief description of drawings]

FIG. 1 is a front view showing tooth profiles of a saw tooth having a high tooth height and a saw tooth having a low tooth height according to an embodiment of the present invention.

FIG. 2 is a front view, a side view, and a bottom view showing the overall configuration of the saw blade according to the above embodiment.

FIG. 3 is a front view showing a tooth profile of a saw tooth having a high tooth height according to a specific example of the present invention.

FIG. 4 is a front view showing a tooth profile of a saw tooth having a low tooth height according to a specific example of the present invention.

FIG. 5 is a front view showing various saw blades of a conventional band saw.

[Explanation of symbols]

 1 Saw blade 3 Straight tooth 5L, 9L Left set tooth 7R, 11R Right set tooth

Claims (1)

[Claims] 1. A saw blade having a saw tooth having a height difference and a rake face having a chip guide surface, wherein the saw tooth having a high tooth height is provided with a chip guide surface such that an inclination angle is relatively steep. A saw blade that is provided with a chip guide surface so that the angle of inclination is relatively gentle on the saw blade with low height.