JPH0536167B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a band saw blade manufacturing device, and more particularly to a band saw blade manufacturing device capable of suppressing upper burrs that occur when manufacturing band saw blades. .

A conventional band saw blade manufacturing apparatus will be explained based on FIGS. 1 to 6. Fig. 1 shows a cutting tooth row in which the outer circumference of a gear cutting tool 1 normally used in band saw blade manufacturing equipment is divided into, for example, 16 parts and provided with a plurality of cutting teeth 3 in the axial direction at equal intervals in the rotational direction. It has been formed.

Note that it is important to make the tip of the band saw blade sharp, so the outer circumference of the gear cutting tool is usually 8.
It is divided into ~16 parts, and as is clear from Figure 3,
Each of the cutting teeth in the cutting tooth row adjacent to each other in the rotational direction is arranged in a staggered manner. By rotating this gear cutting tool, a tooth profile is formed on the material by adjacent cutting teeth 3, for example, cutting teeth 3a and cutting teeth 3b, as shown in FIGS. 2 and 3.

At this time, the bottom forming part 7 and the second surface forming part 9 of the cutting blade 3 in FIG. 4a gradually separate from the material. However, since the scooping surface forming portion 5 separates from the material while rubbing downward from point A of the material shown in FIG. 4b, there is a problem in that an upper burr 11 as shown in FIG. 5 is generated.

In order to solve this problem, there is a method shown in FIG. 6 for suppressing the occurrence of upper burrs. That is, the gear cutting tool is tapered, and the material is placed parallel to the tapered surface to perform gear cutting. In this case, since the material is machined with the gear cutting tool tilted at α°, the scooping surface forming portion 13 does not rub the scooping surface 15 of the cut portion.

However, although this method can suppress the occurrence of upper burrs, the amount of upper burrs increases as the wear of the gear cutting tool increases. Furthermore, when the gear cutting tool is tapered, the length of the gear cutting tool becomes relatively short due to restrictions on the gear cutting machine, resulting in a problem in that machining efficiency decreases.

This invention was devised in view of the above-mentioned problems, and an object of the present invention is to provide a band saw blade manufacturing device that can suppress upper burrs that occur at the tip of the tooth tip of a band saw blade during gear cutting. .

Embodiments of the present invention will be described in detail below with reference to FIGS. 7 to 9. Note that the same parts as in the conventional example will be described with the same reference numerals. FIG. 7 is a perspective view showing a part of the gear cutting tool 1, in which finishing teeth 19 are provided on the outer peripheral portion 17 of the gear cutting tool 1 adjacent to the scooping surface forming portion 5 of each cutting tooth 3. More specifically, the finishing teeth 19 are provided at the base of the scooping surface forming part 5, and as shown in FIG. The cutting edge line 21 of the band saw blade when the blade is manufactured is set lower by an allowable upper burr amount δ (0 to 0.03 mm) which does not significantly affect band saw blade performance.

When gear cutting is performed by rotating the gear cutting tool 1 equipped with the finishing teeth 19 and gradually bringing the material placed in the longitudinal direction of the gear cutting tool 1 closer to the gear cutting tool, it is possible to perform gear cutting. Upper burr 11 generated in almost the same way
are successively cut by the finishing teeth 19. Therefore, the upper burr 11 is shown in FIG. 9, which is an enlarged view of FIG.
As shown in the figure, the allowable amount δ(0~
0.03mm) remains.

As described above, according to this embodiment, the gear cutting tool is rotated, in which the finishing teeth are provided on the outer periphery of the gear cutting tool adjacent to the scooping surface forming portion of the cutting teeth formed on the outer periphery of the gear cutting tool. As a band saw blade manufacturing apparatus that manufactures band saw blades, the upper burrs generated at the tips of the teeth of the band saw blade can be sequentially cut off by the finishing teeth, thereby suppressing the generation of upper burrs.

In another embodiment, as shown in FIG. 10, a finishing tooth 19 is provided at the base portion of the second surface forming portion 9 of the cutting tooth 3. That is, the finishing teeth 19 may be provided on the base portion of at least one of the scooping surface forming portion 5 and the second surface forming portion 9.

In addition, in the above-mentioned embodiment, gear cutting was performed by gradually bringing the material closer to the rotating gear cutting tool, but conversely, the rotating gear cutting tool was brought closer to the material. It's okay.

As can be understood from the above description of the embodiments, the present invention is, in short, a band saw comprising a plurality of cutting tooth rows on the outer periphery having a plurality of cutting teeth 3 in the axial direction forming the teeth of the band saw blade. As a blade manufacturing device,
Each cutting tooth 3 in each cutting tooth row adjacent to each other in the front and back of the rotational direction of the manufacturing apparatus is arranged in a staggered manner, and each of the cutting teeth 3 has a scooping surface 1 of a tooth in a bandsaw blade.
5 or the base portion of the second face forming part 9 forming the flank of the tooth in the band saw blade, the burr formed at the tip of the tooth in the band saw blade is removed. It is provided with finishing teeth 19 for cutting 11.

As is clear from the above configuration, in the present invention, the band saw blade manufacturing apparatus is provided with a plurality of cutting tooth rows on the outer circumferential portion including a plurality of cutting teeth 3 for forming teeth of the band saw blade, and rotates. The cutting teeth 3 of each cutting tooth row adjacent to each other in the front and back directions are arranged in a staggered manner. Then, on at least one of the base portion of the scooping surface forming portion 5 of each cutting tooth 3 or the base portion of the second surface forming portion 9, a burr 11 generated at the tip of the tooth in the band saw blade is
Finishing teeth 19 are provided for cutting.

Therefore, according to the present invention, each of the cutting teeth 3 in the rows of cutting teeth in the two-front row and the front row forms the scooping surface and flank surface of the teeth in the band saw blade, and burrs 11 are generated at the tips of the teeth. Since the burrs 11 are cut by the upper cutting teeth 19 provided at the base of each subsequent cutting tooth 3, it is possible to manufacture a highly accurate band saw blade without burrs at the tips of the teeth. It is.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional gear cutting tool, Fig. 2 is a sectional view taken from Fig. 1, Fig. 3 is a perspective view showing a part of the conventional gear cutting tool, and Fig. 4a is a conventional gear cutting tool. An explanatory diagram showing the cutting teeth of the tool, Fig. 4b is an explanatory diagram showing the tip of the band saw blade cut by the cutting teeth of Fig. 4a, and Fig. 5 is an explanatory diagram showing the band saw blade manufactured by the conventional gear cutting tool. FIG. 6 is an explanatory diagram showing a conventional gear cutting tool and material, FIG. 7 is a perspective view showing a portion of a gear cutting tool according to an embodiment of the present invention, and FIG. 8 is an explanatory diagram showing a conventional gear cutting tool and a material. An explanatory diagram showing the tooth forming state of the band saw blade by the rotary projection tooth profile representation method of the gear cutting tool of the embodiment, FIG. 9 is an enlarged explanatory diagram of the part in FIG. 8, and FIG. 10 is another embodiment of the present invention. FIG. 2 is a perspective view of a portion of an example gear cutting tool. (Explanation of symbols representing main parts of drawings), 1
... Gear cutting tool, 3 ... Cutting tooth, 5 ... Scooping surface forming part, 9 ... Second surface forming part, 17 ... Outer peripheral part, 19
...Finished teeth.

Claims (1)

[Claims] 1. A band saw blade manufacturing device comprising a plurality of cutting teeth 3 in the axial direction that form the teeth of the band saw blade on the outer periphery, and adjacent to each other in the front and rear in the rotation direction of the manufacturing device Each cutting tooth 3 in each cutting tooth row is arranged in a staggered manner, and each of the cutting teeth 3 is arranged in a staggered manner.
is applied to at least one of the base portion of the scooping surface forming portion 5 that forms the tooth scooping surface 15 of the band saw blade or the base portion of the second surface forming portion 9 that forms the flank surface of the teeth of the band saw blade. A band saw blade manufacturing device comprising finishing teeth 19 for cutting off burrs 11 generated at the tips of the teeth.