JP2006297525A - Saw blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the cutting stability of a work by lowering the cutting resistance of a sawtooth having a large tooth height. <P>SOLUTION: This saw blade 13 is used as a cutting tool in a sawing machine, and provided with a number of sawtooth groups 19 formed of a plurality of kinds of sawteeth 15, 17 different in height. Among the two or the plurality of of sawteeth 15, 17, the most highest sawtooth 17 is formed so that the tip side forms a dovetail, and the cutting tooth corner angle of the highest sawtooth is 90° or less. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a saw blade such as a band saw blade or a circular saw blade.

  As an example of a conventional saw blade, a general bee-type band saw blade will be described with reference to FIGS. 6 (a) and 6 (b) and FIG.

  6 (a) is a partial side view of a conventional bee-type band saw blade, FIG. 6 (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. 6A, 6B and 7, the conventional bee-type band saw blade 1 is composed of two types of saw blades having different tooth heights (a saw tooth 3 having a low tooth height and a saw tooth 5 having a high tooth height). A large number of sawtooth groups 7 are provided.

  Each saw tooth 3 having a low tooth height is provided with a bee-shaped tip 9 extending in a bee-like shape on the tip side (in other words, each saw tooth 3 having a low tooth height has a bee-shaped tip side. Each bee-type chip is made of cemented carbide or the like. Each bee-type tip 9 has an incisor portion 9A having a width (2 m), and the incisor corner angle of each bee-type tip 9 (in other words, each saw tooth 3 having a low tooth height). The incisor corner angle (β) is an acute angle.

  On the other hand, each of the saw-tooth 5 having a high tooth height is provided with a bevel-type tip 11 having a corner bevel-polished on the tip side, and each bevel-type tip 11 is made of cemented carbide or the like. Each bevel-type tip 11 has an incision portion 11A having a width (w), and the bevel-type corner angle of each bevel-type tip 11 (in other words, each saw tooth 5 having a high tooth height). The incisor corner angle) α is an obtuse angle.

  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 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, in the bee-type band saw blade 1, the cutting edge corner angle α of the bevel tip 11 is obtuse, so that the cutting resistance of the saw tooth 5 having a high tooth height is large, and the entire band saw blade 1 is unstable. Become. Therefore, there is a problem that the band saw blade 1 is likely to be bent.

In the invention according to claim 1, in a saw blade that is used as a cutting tool in a saw machine and has a plurality of types of saw teeth having different tooth heights,
The saw blade having the highest tooth height among the plurality of kinds of saw teeth is configured to have a bee-shaped tip, and the incisor corner angle of the saw tooth having the highest tooth height is 90 ° or less. .

  According to the invention specific matter of the first aspect, during operation of the saw, the workpiece is cut so as to form a cutting groove by the saw tooth having the highest tooth height, and then the tooth height is subsequently increased. The workpiece is cut so that the cutting groove is widened by a saw blade. Here, the saw tooth with the highest tooth height is configured to have a bee-shaped tip side, and the incision corner angle of the saw tooth with the highest tooth height is 90 ° or less, so the tooth height is the highest. The cutting resistance of the saw blade can be reduced to suppress the bending of the saw blade.

In the invention according to claim 2, in a saw blade that is used as a cutting tool in a saw machine and includes a large number of sawtooth groups composed of a plurality of types of sawtooth having different tooth heights,
The saw blade having the highest tooth height among the plurality of kinds of saw teeth is configured to have a bee-shaped tip, and the incisor corner angle of the saw tooth having the highest tooth height is 90 ° or less. .

  According to the invention specific matter described in claim 2, during the operation of the saw, the workpiece is cut so as to form a cutting groove by the saw tooth having the highest tooth height, and then the tooth height is subsequently increased. The workpiece is cut so that the cutting groove is widened by a saw blade. Here, the saw tooth with the highest tooth height is configured to have a bee-shaped tip side, and the incision corner angle of the saw tooth with the highest tooth height is 90 ° or less, so the tooth height is the highest. The cutting resistance of the saw blade can be reduced to suppress the bending of the saw blade.

  In the invention according to claim 3, in addition to the specific matters of the invention according to claim 1 or claim 2, the incisor corner angle is 90 at both corners on the tip side of the saw tooth having the highest tooth height. It is characterized in that a notch is formed so as to be less than °.

  According to the invention specific matter of claim 3, the same effect as the effect of the invention specific matter of claim 1 or claim 2 is achieved.

  In the invention according to claim 4, in addition to the invention specific matter according to any one of claims 1 to 3, a tip is provided on the tip side of each saw tooth. The maximum tooth width of the tip in the saw tooth with the highest tooth height is smaller than the tooth width of the incision portion of the tip in the saw tooth with the lowest tooth height.

  According to the invention specific matter of claim 4, in addition to the action of the invention specific matter of any one of claims 1 to 3, the tip of the saw tooth having the highest tooth height is provided. Since the maximum tooth width is smaller than the tooth width of the cutting edge portion of the tip in the saw tooth having the lowest tooth height, the outer edge of the tip in the saw tooth having the highest tooth height is in contact with the inner wall surface of the cutting groove. There is almost no.

  According to the invention according to any one of claims 1 to 4, the cutting resistance of the saw blade having the highest tooth height can be reduced, and the bending of the saw blade can be suppressed. The cutting stability of the workpiece can be improved. In particular, according to the invention described in claim 4, since the outer edge of the tip in the saw tooth having the highest tooth height hardly contacts the inner wall surface of the cutting groove, the cutting stability of the workpiece is further improved. Can be increased.

(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 and 1B and FIG. 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 two types having different tooth heights. A large number of sawtooth groups 19 composed of sawtooth (sawtooth 15 having a low tooth height and sawtooth 17 having a high tooth height) are provided. Since the band saw blade 13 has only two kinds of saw teeth 15 and 17, the saw tooth 17 having the highest tooth height is the saw tooth having the highest tooth height.

  Each of the saw teeth 15 having a low tooth height is provided with a bee-shaped tip 21 that expands in a bee-like shape on the tip side (in other words, each of the saw teeth 15 having a low tooth height has a bee-shaped tip side. Each bee-type chip 21 is made of a cemented carbide or the like. Each bee-shaped tip 21 has an incision portion 21A having a width (2 m), and the incision portion 21A of each bee-type tip 21 is left and right (with respect to the saw thickness center line CL). Symmetric in FIG. Furthermore, the incisor corner angle (in other words, the incisor corner angle of each of the saw teeth 15 having a low tooth height) β of each bee-shaped tip 21 is 90 ° or less.

  On the other hand, each of the sawtooth 17 having a high tooth height is provided with a bee-shaped tip 23 that expands in a bee-like shape on the tip side (in other words, each of the sawtooth 17 having a high tooth height has a bee-shaped tip side. Each bee-type chip 23 is made of a cemented carbide or the like. Each bee-shaped tip 23 has a cut-tooth portion 23A having a width (w), and the cut-tooth portion 23A of each bee-type tip 23 is symmetrical with respect to the saw-thickness center line CL. It is. Furthermore, both corners on the tip side of each of the bee-shaped tips 23 (in other words, both corners on the tip side of the saw tooth 17 having a high tooth height) are cut out so that the incisor corner angle γ is 90 ° or less. 23N is formed along the flank, and the maximum tooth width of each bee-type tip 23 is smaller than the tooth width of the cutting edge portion 21A of the bee-type tip 21 by (2e).

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

  During the operation of the saw, the workpiece (not shown) is cut so as to form a width (w) cutting groove while discharging the width (w) chips by the cutting teeth 23A of the bee-type chip 23. . 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 21A of the bee-shaped tip 21.

  Here, each of the saw teeth 17 having a high tooth height is provided with a bee-type tip 23 on the tip side, and the incision corner angle γ of each bee-type tip 23 is 90 ° or less. The cutting resistance of the high saw blade 17 can be reduced, and the bending of the band saw blade 13 can be suppressed.

  Further, since the maximum tooth width of each bee-type tip 23 is smaller by (2e) than the tooth width of the cutting edge portion 21A of the bee-type tip 21, the outer edge of the bee-type tip 23 is the cutting groove. There is almost no contact with the inner wall surface.

  As described above, according to the first embodiment, it is possible to reduce the cutting resistance of the saw blade 17 having a high tooth height and suppress the bending of the band saw blade 13, and the outer edge of the bee-shaped tip 23 is formed by the cutting groove. Therefore, the cutting stability of the workpiece can be improved.

(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 25 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 shown in FIG. 3A, in the band saw blade 25 according to the second embodiment, a chamfer 23C is formed on the outer edge side of each bee-type tip. This reliably prevents the outer edge of the bee-type chip 23 from coming into contact with the inner wall surface of the cutting groove.

  The band saw blade 25 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 27 according to the third embodiment has substantially the same configuration as the band saw blade 25 according to the second embodiment, and differs from the configuration of the band saw blade 25. Only explained.

  That is, in the band saw blade 27 according to the third embodiment, the chamfer 23C is formed larger than the band saw blade 25 according to the second embodiment.

  The band saw blade 27 according to the third embodiment also has the same operations and effects as the band saw blade 25 according to the second embodiment (band saw blade 13 according to the first embodiment).

(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 29 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, the sawtooth group 19 is composed of two types of sawtooth (a sawtooth 15 having a low tooth height and a sawtooth 17 having a high tooth height). In the band saw blade 29 according to the fourth embodiment, the sawtooth group 19 is composed of three kinds of sawtooth (a sawtooth 15 having a low tooth height, a sawtooth 17 having a high tooth height, and a saw tooth 31 having an intermediate tooth height). .

  Here, each of the intermediate tooth height saw blades 31 is provided with a bee-shaped tip 33 extending in a bee-like shape on the tip side (in other words, each of the intermediate tooth height saw teeth 31 has a bee-shaped tip side. Each bee-type chip 33 is made of cemented carbide or the like. Each bee-type tip 33 has an incision portion 33A having a width (2 s), and the incision portion 33A of each bee-type tip 33 has a left and right ( It is symmetrical in FIG. 3 (c). Furthermore, the incisor corner angle (each in other words, the incisor corner angle of the saw tooth 31 of each intermediate tooth height) γ of each bee-type tip 33 is the same as the incisor corner angle γ of the bee-type tip 23. In the band saw blade 29 according to the fourth embodiment, the width of the cutting edge portion 21A of each bee-shaped tip 21 is (2p), and the width of the cutting tooth portion 23A of each bee-shaped tip 23 is The width is (t).

  The band saw blade 29 according to the fourth embodiment also has the same operations and effects as the band saw blade 13 according to the first embodiment. Here, since the saw-tooth group 19 consists of three kinds of saw-tooth 15, 17, 31, it is possible to further disperse the chips and enhance the chip discharging effect.

(Fifth embodiment)
A fifth embodiment of the present invention will be described with reference to FIGS. 4 (a) and 4 (b) and FIG.

  Here, FIG. 4A is a partial side view of the band saw blade according to the fifth embodiment, and FIG. 4B is a view seen from the tooth tip side of the band saw blade according to the fourth embodiment. FIG. 5 is a cross-sectional view of a band saw blade according to the fifth embodiment.

  As shown in FIGS. 4A and 4B and FIG. 5, the band saw blade 35 according to the fifth embodiment has substantially the same configuration as the band saw blade 13 according to the first embodiment. Only the differences from the configuration will be described.

  That is, as described above, in the band saw blade 13 according to the first embodiment, the notches 23N are formed along the flank surfaces at both corners on the front end side of each bee-type chip 23. On the other hand, in the band saw blade 35 according to the fifth embodiment, the notches 23N are formed in both corners on the front end side of each bee-type chip 23 along the direction inclined with respect to the flank. .

  Also, the band saw blade 35 according to the fifth embodiment has the same operations and effects as the band saw blade 13 according to the first embodiment.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in a various other 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 the band saw blade according to the fifth embodiment, and FIG. 4B is a view seen from the tooth tip side of the band saw blade according to the fourth embodiment. It is sectional drawing of the band saw blade concerning 5th Embodiment. FIG. 6A is a partial side view of a conventional bee-type band saw blade, and FIG. 6B 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.

Explanation of symbols

13 Band Saw Blade 15 Saw Blade 17 Saw Blade 19 Saw Blade Group 21 Bachi-Chip Tip 21A Cutting Edge 23C Chamfer 25 Band Saw Blade 27 Band Saw Blade 29 Band Saw Blade 31 Saw Blade 31A Cutting Blade 33 Bachi-Chip Tip

Claims (4)

In a saw blade that is used as a cutting tool in a saw machine and has a plurality of types of saw blades having different tooth heights,
The saw blade having the highest tooth height among the plurality of kinds of saw teeth is configured to have a bee-shaped tip, and the incisor corner angle of the saw tooth having the highest tooth height is 90 ° or less. Saw blade. In a saw blade that is used as a cutting tool in a saw machine and has a large number of sawtooth groups composed of multiple types of sawtooth having different tooth heights,
The saw blade having the highest tooth height among the plurality of kinds of saw teeth is configured to have a bee-shaped tip, and the incisor corner angle of the saw tooth having the highest tooth height is 90 ° or less. Saw blade.   The saw according to claim 1 or 2, wherein notches are formed in both corners on the tip side of the saw tooth having the highest tooth height so that the incisor corner angle is 90 ° or less. blade.   A tip is provided at the tip side of each of the saw blades, and the maximum tooth width of the tip in the saw tooth having the highest tooth height is larger than the tooth width of the incision portion of the tip in the saw tooth having the lowest tooth height. The saw blade according to any one of claims 1 to 3, wherein the saw blade is small.

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