JP4676806B2 - Band saw blade - Google Patents

Description

The present invention relates to a band saw blade .

  Among general band saw blades used as cutting tools in saw machines, there are so-called clam type band saw blades and so-called bee type band saw blades. In addition, the bee-type band saw blade is suitable for high-accuracy cutting with less bending than the clam-type band saw blade, and has been widely used in recent years.

  Next, a conventional bee-type band saw blade will be described with reference to FIGS. 4 (a) and 4 (b) and FIG.

  4 (a) is a partial side view of a conventional bee-type band saw blade, and FIG. 4 (b) is a view of the conventional bee-type band saw blade from the tooth tip side, and FIG. It is sectional drawing of a bee-type band saw blade.

  As shown in FIGS. 4A and 4B and FIG. 5, the conventional bee-type band saw blade 1 includes a large number of sawtooth groups 7 each having a pair of sawtooths 3 and 5 having different configurations. Each saw tooth 3 is provided with a bee-type tip 9 that expands in a bee-like shape on the tip side, and each bee-type tip 9 has a cutting edge portion 9A having a width (2 m). . In addition, each saw tooth 5 includes a bevel tip 11 having a bevel polished corner at the tip side, and each bevel tip 11 has a cutting tooth portion 11A. Here, the tooth height of the bevel-type tip 11 is larger than the tooth height of the bee-type tip 9.

  Accordingly, during the operation of the saw, the workpiece (not shown) is formed so as to form the cutting groove having the width (w) while discharging the cutting chips having the width (w) by the cutting teeth 11A of the bevel chip 11. To cut. Subsequently, the workpiece is cut so as to expand the cutting groove to the width (w + 2 m) while discharging the two chips having the width (m) by the cutting teeth 9A of the bee-type chip 9. In other words, the workpiece is cut while the chips are dispersed and discharged by the cutting teeth 11A of the bevel chip 11 and the cutting teeth 9A of the bee chip 9.

In addition, there exist some which are shown to patent document 1 and patent document 2 as a prior art relevant to this invention.
JP 2004-195608 A Japanese Utility Model Publication No. 4-109811

By the way, as described above, in the conventional bee-type band saw blade 1, when a large number of saw teeth 5 are used as the constituent elements, when viewed from the cross-sectional side of the band saw blade 1 (front side toward the paper surface in FIG. 5), A portion hidden by the bevel-type tip 11 in the nine cutting teeth 9A, in other words, a portion X that does not completely contribute to cutting occurs. Therefore, there exists a problem that the cutting contribution rate of the cutting-tooth part 9A of the bee-type tip 9 falls .

In the invention of claim 1, in a band saw blade that is used as a cutting tool in a saw machine and has a large number of saw teeth,
Each of the saw teeth includes a composite tip having a high tooth height incisor portion and a low tooth height incision portion on the tip side,
The incisor portion having a lower tooth height is positioned outside the incisor portion having a higher tooth height, and the incisor portion having the higher tooth height and the incisor portion having a lower tooth height are symmetrical with respect to the sawtooth center line. The corner angle of the incisor portion with the high tooth height and the corner angle of the incision portion with the low tooth height are 90 ° or less .

According to the invention specific matter of the first aspect, each of the composite tips has the high tooth height and the low tooth height, so that during operation of the saw Cutting the workpiece so as to form a cutting groove by the cutting tooth portion having a high tooth height , and subsequently cutting the workpiece so as to widen the cutting groove by the cutting tooth portion having a low tooth height. it can. Thereby, chips can be dispersed .

For the same reason, a chip having a cutting edge portion higher than the tooth height of the cutting edge portion of the composite chip (a chip corresponding to the beveled chip 11 of the saw blade 5 in the conventional band saw blade 1) is used as a component. need to be is not. Thereby, when viewed from the cross-sectional side of the band saw blade in the incisor portion (the incisor portion having the high tooth height and the incisor portion having the low tooth height) of the composite tip, the portion hidden by the preceding sawtooth , In other words, there is no portion that does not contribute completely to cutting .

In the invention according to claim 2, in addition to the specific matters of the invention according to claim 1, the inner edge of the incisor portion with the lower tooth height is more than the outer edge of the incisor portion with the higher tooth height. It is characterized by being respectively configured to be located on the inner side (saw thickness center line side) .

According to the invention specific matter of claim 2, in addition to the effect of the invention specific matter of claim 1, it is possible to prevent the inner edge of the incisor portion having a low tooth height from contributing to cutting.

In the invention according to claim 3, in addition to the specific matters of the invention according to claim 1 or claim 2, the corner side of the incisor portion with the high tooth height and the incision portion with the low tooth height It is characterized in that chamfers are formed on the corner side .

According to the invention specific matter of the third aspect, in addition to the action of the invention specific matter of the first or second aspect , the corner side of the incisor portion with the high tooth height and the incisor with the low tooth height. Since the chamfering is formed on the corner side of the portion, the chipping resistance of the incision portion having the high tooth height and the incision portion having the low tooth height can be improved.

According to the invention of any one of claims 1 to 3 , the composite is obtained by dispersing chips by the incisor portion having the high tooth height and the incision portion having the low tooth height. In the incisor portion of the chip, there is no portion that does not completely contribute to cutting, so that the cutting contribution ratio of the incisor portion of the composite chip can be increased. In particular, according to the invention described in claim 3 , since the chipping resistance of the incisor portion having the high tooth height and the incision portion having the low tooth height can be improved, respectively, the cutting life of the band saw blade is further increased. Can be extended.

According to the invention described in claim 2 or claim 3 , the cutting performance of the band saw blade can be stabilized in order not to contribute to the cutting of the inner edge of the incisor portion having a low tooth height .

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 (a) and 1 (b) and FIG.

  Here, FIG. 1A is a partial side view of the band saw blade according to the first embodiment, and FIG. 1B is a view of the band saw blade according to the first embodiment as viewed from the tooth tip side. FIG. 2 is a cross-sectional view of the band saw blade according to the first embodiment.

  As shown in FIGS. 1A, 1B, and 2, the band saw blade 13 according to the first embodiment of the present invention is used as a cutting tool in a saw machine, and has a plurality of saw teeth 15 having the same configuration. , 15, and in other words, a plurality of saw teeth 15 having the same configuration. The sawtooth group 17 may include a sawtooth having a configuration different from that of the sawtooth 15.

  Each saw tooth 15 is provided with a composite tip 19 made of a cemented carbide or the like on the tip side, and each composite tip 19 has two incisor portions having different tooth heights (incision portion 19A having a high tooth height). And the incisor portion 19B) having a low tooth height.

  Here, the incisor portion 19A having a high tooth height and the incisor portion 19B having a low tooth height are symmetrical to each other with respect to the saw thickness center line CL (left and right in FIG. 2). The width of each of the high cutting teeth 19A is (w), and the width (full width) of each of the low cutting teeth 19B is (2 m). Further, the corner angle α of each high tooth height 19A and the corner angle β of each low tooth height 19B are each 90 ° or less. Further, each composite tip 19 has an incisor portion 19B having a low tooth height positioned outside the incisor portion 19A having a high tooth height, and an R-shaped inner edge of the incisor portion 19B having a low tooth height is a tooth height. It is configured so as to be located on the inner side (saw thickness center line CL side) by the length (e) than the outer edge of the high cutting tooth portion 19A.

  Next, the operation and effect of the first embodiment will be described.

Since each composite chip 19 has two incisor portions 19A and 19B having different tooth heights, a chip having a width (w) is cut by the incisor portion 19A having a high tooth height during the operation of the saw. The workpiece (not shown) is cut so as to form a cutting groove having a width (w). Subsequently, the workpiece can be cut so as to expand the cutting groove to the width (w + 2 m) while discharging two chips having a width (m) by the cutting teeth portion 19B having a low tooth height. Thereby, chips can be dispersed by the two incisor portions 19A and 19B having different tooth heights . In particular, the corner angle α of each of the incisor portions 19A having a high tooth height and the corner angle β of each of the incisor portions 19B having a low tooth height are each 90 ° or less, so that the cutting resistance is small. It is possible to reliably disperse the chips by the two cutting teeth 19A and 19B having different diameters.

In addition, each composite tip 19 has two incisors 19A and 19B having different tooth heights, and therefore has incisors higher than the tooth height of the incisors 19A and 19B of the composite tip 19. must be a component of the chip (chip corresponding to bevel chip 11 of saw teeth 5 in the conventional band saw blade 1) it is not. Thereby, in the cutting teeth 19A and 19B of the composite tip 19, when viewed from the cross-sectional side of the band saw blade 13, there is no portion hidden by the preceding saw blade , in other words, a portion not completely contributing to cutting .

As described above, according to the first embodiment of the present invention, cutting is completely performed in the cutting teeth 19A and 19B of the composite tip 19 while the chips are dispersed by the two cutting teeth 19A and 19B having different tooth heights. Therefore, the cutting contribution ratio of the two cutting teeth 19A and 19B of the composite tip 19 can be increased.

  Further, the cutting performance of the band saw blade 13 can be stabilized in order not to contribute to the cutting of the inner edge of the incisor portion 19B having a low tooth height.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG.

  Here, Fig.3 (a) is sectional drawing of the band saw blade concerning 2nd Embodiment.

  As shown in FIG. 3A, the band saw blade 21 according to the second embodiment has substantially the same configuration as the band saw blade 13 according to the first embodiment, and differs from the configuration of the band saw blade 13. Only explained.

That is, as described above, in the band saw blade 13 according to the first embodiment, the inner edge of each of the cutting teeth 19B having a low tooth height is R-shaped, whereas the second embodiment In the band saw blade 21 according to the form, a notch 19Bn is formed on the inner edge side of each of the cutting teeth 19B having a low tooth height. Thereby, in the band saw blade 21 according to the second embodiment, machining around the notch 19Bn such as the incisor 19B having a low tooth height is facilitated.

  The band saw blade 23 according to the second embodiment also has the same operations and effects as the band saw blade 13 according to the first embodiment.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG.

  Here, FIG.3 (b) is sectional drawing of the band saw blade concerning 3rd Embodiment.

  As shown in FIG. 3B, the band saw blade 23 according to the third embodiment has substantially the same configuration as the band saw blade 13 according to the first embodiment, and is different from the configuration of the band saw blade 13. Only explained.

  That is, in the band saw blade 23 according to the third embodiment, the chamfer 19Ac, the corner side of each of the cutting teeth 19A having a high tooth height and the corner side of each of the cutting teeth 19B having a low tooth height are provided. 19Bc is formed. As a result, the chipping resistance of each of the incisor portions 19A having a high tooth height and the incisor portion 19B having a low tooth height can be improved.

  The band saw blade 23 according to the third embodiment also has the same operations and effects as the band saw blade 13 according to the first embodiment. Here, since the chipping resistance of each of the incisor portions 19A having a high tooth height and each of the incisor portions 19B having a low tooth height can be enhanced, the cutting life of the band saw blade 25 can be further extended.

(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIG.

  Here, FIG.3 (c) is sectional drawing of the band saw blade concerning 4th Embodiment.

  As shown in FIG. 3C, the band saw blade 25 according to the fourth embodiment has substantially the same configuration as the band saw blade 13 according to the first embodiment, and is different from the configuration of the band saw blade 13. Only explained.

  That is, as described above, in the band saw blade 13 according to the first embodiment, each saw tooth 15 is provided with the composite tip 19 made of cemented carbide on the tip side, and each composite tip is provided. 19 has two incisor portions 19A and 19B having different tooth heights, whereas in the band saw blade 25 according to the fourth embodiment, each saw tooth 15 is on the tip side. Each of the composite tips 27 is made of cemented carbide or the like, and each composite tip 27 has three incisors having different tooth heights (an incisor 27A having a high tooth height, an incisor 27B having a low tooth height, Each has an incisor portion 27C) having an intermediate tooth height.

  Here, the incisor portion 27A having a high tooth height, the incisor portion 27B having a low tooth height, and the incision portion 27C having an intermediate tooth height are respectively left and right (see FIG. 3 (c), and the width of each incisor portion 27A having a high tooth height is (t), and the width (full width) of each incisor portion 27B having a low tooth height is Each is (2p), and the width (full width) of the incisor portion 27C of each intermediate tooth height is (2s). Further, the corner angle α of each incisor portion 19A having a high tooth height (each incisor portion 27C having an intermediate tooth height) and the corner angle β of each incisor portion 19B having a low tooth height are each 90 ° or less. It is.

  And also in the band saw blade 25 concerning 4th Embodiment, there exists an effect | action and effect similar to the band saw blade 13 concerning 1st Embodiment. Here, each composite chip 27 has three cutting teeth 27A having different tooth heights, a cutting tooth 27B having a low tooth height, and a cutting tooth 27C having an intermediate tooth height, so that chips are further removed. It can be dispersed to enhance the chip discharging effect.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in another various aspect by making an appropriate change.

Fig.1 (a) is a partial side view of the band saw blade concerning 1st Embodiment, FIG.1 (b) is the figure seen from the tooth-tip side of the band saw blade concerning 1st Embodiment. It is sectional drawing of the band saw blade concerning 1st Embodiment. FIG. 3A is a sectional view of the band saw blade according to the second embodiment, FIG. 3B is a sectional view of the band saw blade according to the third embodiment, and FIG. FIG. 6 is a cross-sectional view of a band saw blade according to a fourth embodiment. FIG. 4A is a partial side view of a conventional bee-type band saw blade, and FIG. 4B is a view of the conventional bee-type band saw blade as viewed from the tooth tip side. It is sectional drawing of the conventional bee type band saw blade.

13 Band Saw Blade 15 Saw Blade 17 Saw Blade Group 19 Composite Tip 19A High Tooth Cutting Edge 19B Low Tooth Cutting Edge 21 Band Saw Blade 23 Band Saw Blade 25 Band Saw Blade 27 Composite Tip 27A High Tooth Cutting Edge 27B Tooth Height Low incisor part 27C intermediate tooth high incisor part

Claims (3)

In a band saw blade that is used as a cutting tool in a saw machine and has a large number of saw teeth,
Each of the saw teeth includes a composite tip having a high tooth height incisor portion and a low tooth height incision portion on the tip side,
The incisor portion having a lower tooth height is positioned outside the incisor portion having a higher tooth height, and the incisor portion having the higher tooth height and the incisor portion having a lower tooth height are symmetrical with respect to the sawtooth center line. The band saw blade is characterized in that a corner angle of the incisor portion having a high tooth height and a corner angle of the incision portion having a low tooth height are 90 ° or less. The band saw blade according to claim 1, wherein an inner edge of the incisor portion having a low tooth height is configured to be located inside an outer edge of the incisor portion having a high tooth height. The band saw blade according to claim 1 or 2, wherein chamfers are respectively formed on a corner side of the incisor portion having a high tooth height and on a corner side of the incision portion having a low tooth height.

Images