WO2018155356A1 - Hard-tip band saw blade having offset teeth in which tooth tip chamfer is formed along tooth tip edge - Google Patents

Hard-tip band saw blade having offset teeth in which tooth tip chamfer is formed along tooth tip edge Download PDF

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Publication number
WO2018155356A1
WO2018155356A1 PCT/JP2018/005634 JP2018005634W WO2018155356A1 WO 2018155356 A1 WO2018155356 A1 WO 2018155356A1 JP 2018005634 W JP2018005634 W JP 2018005634W WO 2018155356 A1 WO2018155356 A1 WO 2018155356A1
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Prior art keywords
tooth
hard
tip
teeth
saw blade
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PCT/JP2018/005634
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French (fr)
Japanese (ja)
Inventor
堀口　勝弘
長野　裕二
Original Assignee
株式会社アマダホールディングス
株式会社アマダマシンツール
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Application filed by 株式会社アマダホールディングス, 株式会社アマダマシンツール filed Critical 株式会社アマダホールディングス
Publication of WO2018155356A1 publication Critical patent/WO2018155356A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/02—Structural design of saw blades or saw teeth
    • B27B33/06—Band saw blades

Definitions

  • the present invention is used when a workpiece material is cut by a band saw machine, and has a hard tip made of a hard material such as cemented carbide or cermet on the tooth tip side, and the tooth tip is shaken. It relates to hard-set band saw blades with set teeth.
  • a clam toothed high-speed bimetallic band saw blade (hereinafter referred to as “high-speed” appropriately) having a body portion made of high-toughness alloy steel and a cutting edge portion (tooth tip portion) made of high-speed tool steel (high speed or HSS).
  • Band saw blades are widely used.
  • the left corner of the right set teeth (left tooth edge) and the right corner of the left set teeth (right tooth edge) cut direction with respect to the straight tooth tip edge (tooth tip edge line) Each has a protruding edge.
  • cutting edges cutting resistance of a straight tooth
  • the saw teeth (straight teeth, right set teeth, and left set teeth) have hard tips made of a hard material such as cemented carbide on the tooth tip side.
  • the toughness of the carbide tip is usually low, the right and left set teeth do not have a protruding edge that tends to cause chipping (missing teeth). Instead, a corner chamfer of about 45 ° is formed in the left and right tooth tip corners of the straight tooth.
  • the straight tooth is a bevel tooth having a trapezoidal tooth tip (see Patent Document 1 and Patent Document 2).
  • the left and right corner chamfers are the center of the saw blade in order to improve the durability of the hard tip band saw blade by equalizing the left and right cutting resistance of the bevel teeth and suppressing the bending of the workpiece material (metal workpiece). It is necessary to polish the hard chip with high accuracy by a dedicated polishing apparatus so as to be symmetrical with respect to the line. Therefore, when the number of bevel teeth of the hard tip band saw blade increases, the manufacturing time of the hard tip band saw blade becomes longer, and the manufacturing cost of the hard tip band saw blade increases. That is, there is a problem that it is not easy to reduce the manufacturing cost of the hard chip band saw blade while improving the durability of the hard chip band saw blade.
  • the present invention can provide a hard tooth band saw blade having a novel configuration that can solve the above-described problems, that is, it can sufficiently reduce the manufacturing cost while improving the durability.
  • An object of the present invention is to provide a hard chip band saw blade that can be used.
  • the inventor of the present application prototyped hard chip band saw blades of multiple types of set teeth with different configurations, and obtained a new knowledge as a result of performing a plurality of cutting tests using a plurality of types of hard chip band saw blades.
  • the present invention has been completed.
  • the new knowledge is that, even if the right and left set teeth have protrusions, the tip of the tip of the right set tooth and the tip of the left set tooth are chamfered.
  • the tooth includes a tooth combination pattern including a straight tooth as a leading tooth (preceding saw tooth) and a right set tooth and a left set tooth as a following tooth (following saw tooth).
  • the straight teeth, the right set teeth, and the left set teeth are hard tip band saw blades each having a hard tip made of a hard material on the tooth tip side, and the right set teeth Left corner portion (left tooth edge portion) and right corner portion (right tooth edge portion) of the left set teeth project in the cutting direction (cutting direction) with respect to the straight tooth tip edge (tooth tip ridge line).
  • a tooth chamfer (chip chamfer) is formed along the tooth tip edge at the tooth tip of the right set tooth and the tooth tip of the left set tooth.
  • a hard chip band saw blade is provided in which the ratio of the number of the right set teeth and the left set teeth is set to 71 to 83%.
  • a tooth chamfer is formed on the tooth tip of the straight tooth along the tooth tip edge.
  • the total number of saw teeth in the saw tooth group is 5 or more.
  • the set-up position of the right set teeth is located between the root of the right set teeth and the hard tip, and the set-up position of the left set teeth is set to the bottom of the left set teeth.
  • the chamfer angle of the tooth chamfer with respect to the band width direction is set to 35 to 55 degrees.
  • the chamfer length in the band width direction of the tooth chamfer is set to 0.03 to 0.10 mm.
  • the protruding amount of the protruding edge is set to 0.02 to 0.10 mm.
  • the tooth chamfering is formed along the tooth tip edge at the tooth tip of the right set tooth and the tooth tip of the left set tooth, respectively, in the saw tooth group.
  • the ratio of the number of right and left set teeth to the total number of saw teeth is set to 71 to 83%. Therefore, even if the right set teeth and the left set teeth have the protruding edge portion, it is possible to sufficiently suppress the bending of the work material (metal work) and the chipping of the hard chip band saw blade. In other words, even if the straight teeth are not beveled, it is possible to sufficiently suppress bending of the workpiece material and chipping of the hard chip band saw blade.
  • the present invention as described above, it is possible to sufficiently suppress the bending of the workpiece material and the chipping of the hard chip band saw blade without using the straight teeth as bevel teeth.
  • the present invention can significantly reduce the manufacturing cost of the hard tip band saw blade by significantly reducing the manufacturing time of the hard tip band saw blade while improving the durability of the hard tip band saw blade. Can do.
  • FIG. 1A is a left side portion of a part of the hard tip band saw blade according to the first embodiment of the present invention
  • FIG. 1B is a part of the hard tip band saw blade according to the first embodiment of the present invention
  • FIG. 1C is a cross-sectional view of a part of the hard tip band saw blade according to the first embodiment of the present invention
  • Fig.2 (a) is an enlarged view of FIG.1 (c)
  • FIG.2 (b) is an enlarged view which shows the tooth tip chamfering formed in the tooth tip of the hard tip.
  • FIG. 3A is a left side portion of a part of the hard tip band saw blade according to the second embodiment of the present invention
  • FIG. 2B is a part of the hard tip band saw blade according to the second embodiment of the present invention.
  • FIG. 2C is a cross-sectional view of a part of the hard tip band saw blade according to the second embodiment of the present invention.
  • 4A is a left side surface portion of a part of the hard tip band saw blade according to the third embodiment of the present invention
  • FIG. 4B is a part of the hard tip band saw blade according to the third embodiment of the present invention.
  • FIG. 4C is a sectional view of a part of the hard tip band saw blade according to the third embodiment of the present invention.
  • FIG. 5A is a left side portion of a part of the hard chip band saw blade according to the fourth embodiment of the present invention, and FIG.
  • FIG. 5B is a part of the hard chip band saw blade according to the fourth embodiment of the present invention.
  • FIG. 5C is a cross-sectional view of a part of the hard tip band saw blade according to the fourth embodiment of the present invention.
  • FIG. 6 is a diagram showing a sawtooth combination pattern of a sawtooth group applicable to the present invention.
  • FIG. 7A is a left side portion of a part of the hard tip band saw blade according to Comparative Example 1
  • FIG. 7B is a view of a part of the hard tip band saw blade according to Comparative Example 1 as viewed from the blade edge side.
  • FIG. 7C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 1.
  • FIG. 8A is a left side surface portion of a part of the hard tip band saw blade according to Comparative Example 2
  • FIG. 8B is a view of a part of the hard tip band saw blade according to Comparative Example 2 as viewed from the blade edge side.
  • FIG. 8C is a cross-sectional view of a part of the hard tip band saw blade according to the second comparative example.
  • 9A is a left side portion of a part of the hard tip band saw blade according to Comparative Example 3
  • FIG. 9B is a view of a part of the hard tip band saw blade according to Comparative Example 3 as viewed from the tooth tip side.
  • FIG. 9C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 3.
  • FIG. 10 (a) is a left side portion of a part of the hard tip band saw blade according to Comparative Example 4, and FIG. 10 (b) is a view of a part of the hard tip band saw blade according to Comparative Example 4 as viewed from the blade edge side.
  • FIG. 10C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 4.
  • FIG. 11A is a left side surface of a part of the hard tip band saw blade according to Comparative Example 5
  • FIG. 11B is a view of a part of the hard tip band saw blade according to Comparative Example 5 as viewed from the blade edge side.
  • FIG. 11C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 5.
  • FIG. 11A is a left side surface of a part of the hard tip band saw blade according to Comparative Example 5
  • FIG. 11B is a view of a part of the hard tip band saw blade according to Comparative Example 5 as viewed
  • FIG. 12 is a table showing, as a result of the first cutting test, the ratio of chip width, chipping presence, and cutting resistance at the time of 10 cuts.
  • FIG. 13 is a graph showing the relationship between the number of cuts and the amount of bending of the workpiece as a result of the first cutting test.
  • FIG. 14 is a graph showing the number of chippings at the time of 32 cuts as a result of the second and third cutting tests.
  • the “left-right direction” means that the cutting edge (tooth tip) of the hard chip band saw blade is facing downward, and the direction from the saw blade traveling direction (the traveling direction of the hard chip band saw blade). Refers to the left and right direction. “Preceding” refers to preceding in the saw blade traveling direction, and “following” refers to following in the saw blade traveling direction.
  • the “saw blade center line” refers to a line passing through the center in the left-right direction of the hard chip band saw blade. “Cutting of a work material (metal work)” refers to a phenomenon in which a cut surface of a work material becomes spherical or inclined due to bending of a hard chip band saw blade or the like.
  • L is the left direction
  • R is the right direction
  • F is the saw blade traveling direction
  • S is the cutting direction of the hard tip band saw blade
  • W is the hard tip band saw.
  • the band width direction (saw width direction) of the blade is indicated respectively.
  • the hard tip band saw blade 10 As shown in FIGS. 1A, 1B, and 1C, the hard tip band saw blade 10 according to the first embodiment is used when a workpiece material (not shown) is cut by a band saw machine (not shown). It is done. Moreover, the trunk
  • the hard chip band saw blade 10 is repeatedly provided with a sawtooth group 12 composed of a predetermined first sawtooth combination pattern (sawtooth combination).
  • the sawtooth group 12 includes a straight tooth 14 as a leading tooth (preceding sawtooth), a right set tooth 16 and a left set tooth 18 as a succeeding tooth (following saw tooth) of the straight tooth 14, and a succeeding tooth of the left set tooth 18.
  • the right set teeth 20 Further, the sawtooth group 12 includes a straight tooth 22 as a succeeding tooth of the right set tooth 20, a left set tooth 24 and a right set tooth 26 as a succeeding tooth of the straight tooth 22, and a left tooth as a succeeding tooth of the right set tooth 26.
  • clam teeth 28 is
  • the sawtooth group 12 includes eight sawtooth teeth including a straight tooth 14, a right set tooth 16, a left set tooth 18, a right set tooth 20, a straight tooth 22, a left set tooth 24, a right set tooth 26, and a left set tooth 28. It is comprised by.
  • the right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 24, the right set teeth 26, and the left set teeth 28 in the saw tooth group 12 are alternately arranged along the saw blade traveling direction.
  • the number of saw blades in the saw tooth group 12 is eight, in other words, five or more. If the number of saw blade groups 12 is four or less, the saw tooth combination pattern of the saw tooth group 12 becomes monotonous and chatter vibrations. This is because there is a concern that this will occur.
  • the straight tooth 14 (22) has a hard tip 14T (22T) made of a cemented carbide (for example, a hard material called cemented carbide containing tungsten carbide or cobalt) on the tooth tip side.
  • the right set teeth 16 (20, 26) have hard tips 16T (20T, 26T) made of cemented carbide on the tooth tip side.
  • the left set teeth 18 (24, 28) have hard tips 18T (24T, 28T) made of cemented carbide on the tooth tip side.
  • cemented carbide as a constituent material for the hard tip 14T or the like
  • other hard materials such as cemented carbide to which titanium carbide or the like is added or cermet containing tungsten carbide or the like are used for the construction of the hard tip 14T or the like. It may be a material.
  • the right set teeth 16 (20) and the left set teeth 18 are symmetrical with respect to the sawtooth center line M.
  • the left set teeth 24 (28) and the right set teeth 26 are symmetrical with respect to the sawtooth center line M.
  • the amount of swinging out of the right set teeth 16 (20, 26) (the amount of swinging outward in the left-right direction) and the amount of swinging out of the left set teeth 18 (24, 28) are set to be the same.
  • the set-out position (claw bending position) of the right set teeth 16 (20, 26) is located between the root of the right set teeth 16 (20, 26) and the hard tip 16T (20T, 26T).
  • the set-out position of the left set teeth 18 (24, 28) is located between the root of the left set teeth 18 (24, 28) and the hard tip 18T (24T, 28T).
  • the clashes out of the right set teeth 16 (20, 26) and the claws out of the left set teeth 18 (24, 28) are performed in the final process of manufacturing the hard chip band saw blade 10.
  • the shape of the right set teeth 16 (20, 26) before the set-out operation is the same as the straight teeth 14 (22).
  • the shape of the left set teeth 18 (24, 28) before the set-out operation is the same as the straight teeth 14 (22). In other words, the saw teeth before the clashes are formed have the same shape.
  • the left corner portion (left tooth edge portion) of the hard tip 16T (20T, 26T) of the right set teeth 16 (20, 26) is a straight tooth 14 ( 22) is a projecting edge portion B projecting in the cutting direction (cutting direction) with respect to the tooth tip edge (tooth tip ridge line).
  • the right corner portion (right tooth edge portion) of the hard tip 18T (24T, 28T) of the left set tooth 18 (24, 28) protrudes in the cutting direction with respect to the tooth tip edge of the straight tooth 14 (22). It is a protruding portion B.
  • the protruding amount j of the protruding edge B is set to 0.02 to 0.10 mm.
  • the protrusion amount of the projecting edge portion B is set to 0.02 mm or more.
  • the protruding amount of the protruding portion B is set to 0.10 mm or less is that when the protruding amount exceeds 0.10 mm, the cutting resistance (load) acting on the protruding portion B increases and chipping is likely to occur.
  • the reason why the set teeth in the sawtooth group 12 is set to 71% or more is that when it is less than 71%, the number of the projecting edge portions B is reduced and the cutting resistance of the hard chip band saw blade 10 is increased. .
  • the ratio of the set teeth in the sawtooth group 12 is set to 83% or less. If the ratio exceeds 83%, the number of straight teeth 14 (22) decreases, and there is a concern that the straight running stability of the hard tip band saw blade 10 may be reduced. Because it is done.
  • a tooth tip chamfering (chip chamfering) C is provided on the tooth tip of the hard tip 14T (22T) of the straight tooth 14 (22). It is formed along the tooth tip ridgeline. Further, a tooth tip chamfer C is formed along the tooth tip edge on the tooth tip of the hard tip 16T (20T, 26T) of the right set tooth 16 (20, 26). On the tooth tip of the hard tip 18T (24T, 28T) of the left set tooth 18 (24, 28), a tooth chamfer C is formed along the tooth tip edge. In addition, it is not necessary to form the tooth chamfer C on the tooth tip of the hard tip 14T (22T) of the straight tooth 14 (22).
  • the chamfering angle ⁇ of the tooth chamfer C with respect to the band width direction is set to 35 to 55 degrees.
  • the chamfering angle ⁇ of the tooth chamfering C with respect to the band width direction is set to 35 degrees or more, if it is less than 35 degrees, the teeth of saw teeth such as the straight teeth 14, the right set teeth 16 and the left set teeth 18 This is because the tip strength cannot be sufficiently secured and chipping is likely to occur.
  • the reason why the chamfering angle ⁇ of the tooth chamfering C with respect to the band width direction is set to 55 degrees or less is that when the chamfering angle ⁇ exceeds 55 degrees, the cutting resistance of the sawtooth increases and it becomes difficult to cut the workpiece. .
  • the chamfer length k in the band width direction of the tooth chamfer C is set to 0.03 to 0.10 mm.
  • the chamfer length k in the width direction of the tooth chamfering C is set to 0.03 mm or more. If the chamfering length k is less than 0.03 mm, the tooth tooth strength of the sawtooth cannot be sufficiently secured, and chipping is performed. It is because it becomes easy to occur.
  • the chamfering length k in the band width direction of the tooth chamfering C is set to 0.10 mm or less. If the chamfering length k exceeds 0.10 mm, the cutting resistance of the sawtooth increases and it becomes difficult to cut the workpiece material. Because.
  • the tip chamfer C is formed along the tip edge of the tip of the hard tip 14T (22T) of the straight tooth 14 (22), the tip tip strength of the straight tooth 14 (22) is sufficiently high. It is possible to more sufficiently suppress the bending of the work material and the chipping of the hard chip band saw blade 10.
  • the manufacturing time of the hard tip band saw blade 10 is significantly shortened, and the manufacturing cost of the hard tip band saw blade 10 is sufficiently reduced.
  • each of the saw blades before carrying out the clasping operation has the same shape, it is possible to improve the manufacturing efficiency of the hard tip band saw blade 10 and to sufficiently reduce the manufacturing cost of the hard tip band saw blade 10. it can.
  • the hard chip band saw blade 30 according to the second embodiment has the same configuration as the hard chip band saw blade 10 according to the first embodiment (see FIG. 1). Have.
  • the configurations of the hard tip band saw blade 30 configurations different from the hard tip band saw blade 10 will be mainly described.
  • symbol is attached
  • the hard chip band saw blade 30 is repeatedly provided with a sawtooth group 32 composed of a predetermined second sawtooth combination pattern.
  • the sawtooth group 32 excludes the straight teeth 22, the right set teeth 26, and the left set teeth 28 from the saw tooth group 12 in the hard tip band saw blade 10 according to the first embodiment.
  • the sawtooth group 32 is composed of five sawtooths of the straight tooth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, and the left set teeth 24.
  • the right set teeth 16, the left set teeth 18, the right set teeth 20, and the left set teeth 24 in the saw tooth group 32 are alternately arranged along the saw blade traveling direction.
  • the hard tip band saw blade 34 according to the third embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have.
  • the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade will be described.
  • those corresponding to the constituent elements in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
  • the hard chip band saw blade 34 is repeatedly provided with a sawtooth group 36 having a predetermined third sawtooth combination pattern.
  • Each sawtooth group 36 is constituted by two small sawtooth groups 38 and 40 that are a combination of a plurality of sawtooth.
  • the small sawtooth group 38 excludes the left set teeth 28 from the sawtooth group 12 of the hard tip band saw blade 10.
  • the small sawtooth group 40 excludes the right set teeth 20 and the left set teeth 24 from the sawtooth group 12 of the hard tip band saw blade 10.
  • the left set teeth 42 are added between the straight teeth 14 and the right set teeth 16 in the sawtooth group 12 of the hard tip band saw blade 10.
  • the left set teeth 42 have a hard tip 40T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28).
  • the small sawtooth group 38 is composed of seven sawtooth teeth of the straight tooth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, the straight teeth 22, the left set teeth 24, and the right set teeth 26.
  • the small saw tooth group 40 is composed of seven saw teeth of a straight tooth 14, a left set tooth 42, a right set tooth 16, a left set tooth 18, a straight tooth 22, a right set tooth 26, and a left set tooth 28.
  • the sawtooth group 36 is composed of 14 sawtooth.
  • the right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 24, and the right set teeth 26 in the small saw tooth group 38 are arranged alternately along the saw blade traveling direction.
  • the left set teeth 42, the right set teeth 16, the left set teeth 18, the right set teeth 26, and the left set teeth 28 in the small saw tooth group 40 are alternately arranged along the saw blade traveling direction.
  • the hard tip band saw blade 44 according to the fourth embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have.
  • the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 44 will be described.
  • those corresponding to the components in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
  • the hard chip band saw blade 44 is repeatedly provided with a sawtooth group 46 having a predetermined fourth sawtooth combination pattern.
  • a left set tooth 48 and a right set tooth 50 are added between the right set teeth 20 and the straight teeth 22 in the saw set 12 of the hard tip band saw blade 10.
  • the left set teeth 48 have a hard tip 48T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28).
  • the right set teeth 50 have a hard tip 50T made of cemented carbide on the tooth tip side, and have the same configuration as the right set teeth 16 (20, 26).
  • the saw tooth group 46 further includes a right set tooth 52 and a left set tooth 54 following the left set tooth 28 in the saw tooth group 12 of the hard tip band saw blade 10.
  • the right set teeth 52 have a hard tip 52T made of cemented carbide on the tooth tip side, and have the same configuration as the right set teeth 16 (20, 26).
  • the left set teeth 54 have a hard tip 54T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28).
  • the sawtooth group 46 includes the straight teeth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 48, the right set teeth 50, the straight teeth 22, the left set teeth 24, the right set teeth 26, It consists of twelve saw teeth: a left set tooth 28, a right set teeth 52, and a left set teeth 54.
  • the left set teeth 54 are alternately arranged along the traveling direction of the saw blade.
  • the sawtooth combination pattern of the sawtooth group 12 and the like in the hard tip band saw blade 10 and the like is replaced with any one of the plurality of sawtooth combination patterns shown in FIG. 6 in place of the predetermined first to sixth sawtooth combination patterns.
  • the straight teeth 14 may be beveled teeth having trapezoidal tips.
  • L indicates the left direction
  • R indicates the right direction
  • F indicates the traveling direction of the hard chip band saw blade
  • the hard tip band saw blade 56 according to the fifth embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have.
  • the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 56 will be described.
  • those corresponding to the constituent elements in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
  • the hard chip band saw blade 56 is repeatedly provided with a sawtooth group 58 composed of a predetermined fifth sawtooth combination pattern.
  • the sawtooth group 58 excludes the right set teeth 20, the straight teeth 22, the left set teeth 24, the right set teeth 26, and the left set teeth 28 from the saw tooth group 12 in the hard tip band saw blade 10.
  • the sawtooth group 58 includes three sawtooths of the straight tooth 14, the right set teeth 16, and the left set teeth 18.
  • Comparative Example 2 As shown in FIGS. 8A, 8B, and 8C, the hard tip band saw blade 60 according to Comparative Example 2 has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). is doing. Hereinafter, only the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 60 will be described. In addition, about the component corresponding to the component in the hard chip
  • the hard chip band saw blade 60 is repeatedly provided with a sawtooth group 62 composed of a predetermined sixth sawtooth combination pattern.
  • the sawtooth group 62 excludes the straight teeth 22 from the sawtooth group 12 in the hard tip band saw blade 10.
  • the sawtooth group 62 is composed of seven sawtooth teeth including a straight tooth 14, a right set tooth 16, a left set teeth 18, a right set teeth 20, a left set teeth 24, a right set teeth 26, and a left set teeth 28. Yes.
  • the right set teeth 16, left set teeth 18, right set teeth 20, left set teeth 24, right set teeth 26, and left set teeth 28 in the saw tooth group 62 are alternately arranged along the saw blade traveling direction.
  • the hard tip band saw blade 64 according to the comparative example 3 is repeatedly provided with a sawtooth group 66 having a predetermined fifth sawtooth combination pattern.
  • a configuration different from the hard tip band saw blade 56 (see FIG. 7) according to the comparative example 1 among the configurations of the hard tip band saw blade 64 will be briefly described.
  • those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawings.
  • the right set teeth 16 and the left set teeth 18 in the sawtooth group 66 do not have the projecting edges B, respectively.
  • the straight tooth 14, the right set teeth 16, and the left set teeth 18 in the sawtooth group 66 do not have the tooth chamfer C.
  • corner chamfers D are formed at the left and right tip corner portions of the straight tooth 14 in the sawtooth group 66, respectively.
  • the straight tooth 14 in the sawtooth group 66 is a bevel tooth having a trapezoidal tooth tip.
  • the hard tip band saw blade 68 according to the comparative example 4 is repeatedly provided with a sawtooth group 70 having a predetermined fifth sawtooth combination pattern.
  • a configuration different from the hard tip band saw blade 56 (see FIG. 7) according to the comparative example 1 among the configurations of the hard tip band saw blade 68 will be briefly described.
  • those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawings.
  • the right set teeth 16 and the left set teeth 18 in the sawtooth group 70 do not have the projecting edges B, respectively.
  • the straight tooth 14, the right set teeth 16, and the left set teeth 18 in the sawtooth group 70 do not have the tooth chamfer C.
  • the hard tip band saw blade 72 according to the comparative example 5 is repeatedly provided with a sawtooth group 74 having a predetermined fifth sawtooth combination pattern.
  • a configuration different from the hard tip band saw blade 56 according to Comparative Example 1 (see FIG. 7) in the configuration of the hard tip band saw blade 72 will be briefly described.
  • those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawing.
  • the straight teeth 14, the right set teeth 16 and the left set teeth 18 in the saw tooth group 74 do not have tooth chamfers C, respectively.
  • the hard chip band saw blade 10 according to the first embodiment is used as the product 1
  • the hard chip band saw blade 30 according to the second embodiment is used as the product 2
  • the hard chip band saw blade 34 according to the third embodiment is used as the product 3.
  • the hard chip band saw blade 44 according to the fourth embodiment is prototyped as an implementation product 4. Comparative Example 1 with Hard Tip Band Saw Blade 56 according to Comparative Example 1 as Comparative Product 1, Hard Chip Band Saw Blade 60 with Comparative Example 2 as Comparative Product 2, and Hard Chip Band Saw Blade 64 with Comparative Example 3 as Comparative Product 3
  • Examples 1 to 4 and comparative products 1 to 5 have a base tooth profile with a crease angle of 10 degrees, a base tooth profile with a clearance angle of 20 degrees, a band width of 41 mm, a band thickness (thickness) of 1.3 mm, a band length of 4570 mm, and a pitch of 1. Set to 8 / 2P.
  • the protrusion amount of the projecting edge portion was set to 0.05 mm.
  • the chamfering angle of the tooth chamfer was set to 45 degrees and the chamfering length of the tooth chamfering was set to 0.05 mm.
  • First cutting test Using the execution products 1 to 6 and the comparison products 1 to 3, under a predetermined first cutting condition (saw speed of 40 m / mim, cutting time of 1 cut of 8 minutes), a diameter of 200 mm made of stainless steel (SUS304) is used. A first cutting test was performed on the workpiece material.
  • the chip width is 1/2 or less of the thickness of the band, and tipping of the tooth tip does not occur.
  • the width of the chip is 1 ⁇ 2 or less of the band thickness.
  • the width of the chip is substantially the same as the thickness of the band, and chipping of the tooth tip occurs. confirmed. Furthermore, it was confirmed that when the comparative product 5 having a protruding portion and no chamfered tooth was used, the width of the chip was 1 ⁇ 2 or less of the band thickness. The previous chipping occurred.
  • the cutting resistance at the time of 10 cuts when using the implemented products 1 to 4 was equal to or less than the cutting resistance at the time of 10 cuts using the comparative product 3 as a conventional product.
  • the cutting resistance at the 10th cut when using the comparative products 1, 2 and 5 is less than or equal to the cutting resistance at the 10th cut when using the comparative product 1, It was confirmed that the cutting resistance was the same as that at the 10th cut when ⁇ 4 was used. It was confirmed that the cutting resistance at the time of 10 cuts when the comparative product 4 was used was larger than the cutting resistance at the time of 10 cuts when the comparative product 3 was used.
  • the ratio of the cutting resistance is a ratio based on the cutting resistance at the time of 10 cuts when the comparative product 3 is used.
  • the amount of bending of the work material can be sufficiently reduced compared with the case of using comparative product 3, and the durability of the hard chip band saw blade can be improved. It could be confirmed.
  • the comparative products 1 and 2 were used, the amount of bending of the work material was further reduced as compared with the comparative product 3, but compared with the case where the working products 1 to 4 were used. Thus, it was clearly confirmed that the durability of the hard chip band saw blade was lowered.
  • the comparative products 4 and 5 were used, it was confirmed that the amount of bending of the workpiece material was increased and the durability of the hard tip band saw blade was lowered as compared with the case of using the comparative product 3.
  • the first cutting test when the amount of bending of the workpiece material was 1.0 mm or more, it was regarded as the life of the hard tip band saw blade.
  • the chipping number is clearly reduced as compared with the case of using the comparative product 5, but the effect is It was not enough, and it was confirmed that the ratio of the set teeth in the sawtooth group affected the chipping.

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Abstract

Provided is a hard-tip band saw blade in which it is possible to sufficiently reduce manufacturing costs while improving durability. In this hard-tip band saw blade 10, left-side corner parts of hard tips 16T (20T, 26T) of right offset teeth 16 (20, 26) and right-side corner parts of hard tips 18T (24T, 28T) of left offset teeth 18 (24, 28) are formed into flange parts B that protrude in the cutting direction with respect to the tooth tip edges of straight teeth 14 (22). Tooth tip chamfers C are formed along the tooth tip edges of the the tooth tips of hard tips 14T (22T) of the straight teeth 14 (22), the tooth tips of the hard tips 16T (20T, 26T) of the right offset teeth 16 (20, 26), and the tooth tips of the hard tips 18T (24T, 28T) of the left offset teeth 18 (24, 28). The proportion of offset teeth in a saw tooth group 12 is set to 71-83%.

Description

歯先面取が歯先縁に沿って形成されたアサリ歯を有する硬質チップ帯鋸刃Hard tip band saw blade with set teeth with chamfered teeth formed along the tip edge
　本発明は、帯鋸盤によってワーク材の切削加工を行う際に用いられ、歯先側に超硬合金、サーメット等の硬質材料からなる硬質チップを有し、歯先の歯振（あさり）出し作業を施したアサリ歯(set teeth)の硬質チップ帯鋸刃に関する。 The present invention is used when a workpiece material is cut by a band saw machine, and has a hard tip made of a hard material such as cemented carbide or cermet on the tooth tip side, and the tooth tip is shaken. It relates to hard-set band saw blades with set teeth.
　従来から、強靱性の高い合金鋼からなる胴部と、高速度工具鋼（ハイス又はＨＳＳ）からなる刃先部（歯先部）とを有したアサリ歯のハイスバイメタル帯鋸刃（以下、適宜にハイス帯鋸刃という）が広く普及している。ハイス帯鋸刃において、右アサリ歯の左側コーナ部（左側歯縁部）及び左アサリ歯の右側コーナ部（右側歯縁部）は、直歯の歯先縁（歯先稜線）に対して切込み方向へ突出した突縁部にそれぞれなっている。これにより、突縁部が直歯によって生成される切粉を分断して、切削抵抗（直歯の切削抵抗）を低減することができる。 Conventionally, a clam toothed high-speed bimetallic band saw blade (hereinafter referred to as “high-speed” appropriately) having a body portion made of high-toughness alloy steel and a cutting edge portion (tooth tip portion) made of high-speed tool steel (high speed or HSS). Band saw blades) are widely used. In the high speed band saw blade, the left corner of the right set teeth (left tooth edge) and the right corner of the left set teeth (right tooth edge) cut direction with respect to the straight tooth tip edge (tooth tip edge line) Each has a protruding edge. Thereby, cutting edges (cutting resistance of a straight tooth) can be reduced by dividing the chips generated by the straight teeth at the protruding portion.
　近年、ハイス帯鋸刃よりも切削性能に優れたアサリ歯の硬質チップ帯鋸刃も広く普及している。硬質チップ帯鋸刃において、鋸歯（直歯、右アサリ歯、及び左アサリ歯）は、歯先側に、超硬合金等の硬質材料からなる硬質チップを有している。また、通常、超硬チップの靱性が低いことから、右アサリ歯及び左アサリ歯は、チッピング（歯欠け）の要因になり易い突縁部を有していない。その代わり、直歯の左右の歯先コーナ部には、約４５°のコーナ面取がそれぞれ形成されている。換言すれば、硬質チップ帯鋸刃においては、直歯が台形状の歯先を有したベベル歯になっている（特許文献１及び特許文献２等参照）。これにより、直歯（ベベル歯）によって生成される切粉の幅を小さくして、切削抵抗（直歯の切削抵抗）を低減することができる。 In recent years, hard-tip band saw blades with claws that are superior in cutting performance to high-speed band saw blades have become widespread. In the hard tip band saw blade, the saw teeth (straight teeth, right set teeth, and left set teeth) have hard tips made of a hard material such as cemented carbide on the tooth tip side. Moreover, since the toughness of the carbide tip is usually low, the right and left set teeth do not have a protruding edge that tends to cause chipping (missing teeth). Instead, a corner chamfer of about 45 ° is formed in the left and right tooth tip corners of the straight tooth. In other words, in the hard chip band saw blade, the straight tooth is a bevel tooth having a trapezoidal tooth tip (see Patent Document 1 and Patent Document 2). Thereby, the width | variety of the chip produced | generated by a straight tooth (bevel tooth) can be made small, and cutting resistance (cutting resistance of a straight tooth) can be reduced.
特開平６－１５５１５８号公報JP-A-6-155158 特許５５８４０４６号公報Japanese Patent No. 5584046
　ところで、ベベル歯の左右の切削抵抗を均等にして、ワーク材（金属ワーク）の切れ曲がりを抑制して、硬質チップ帯鋸刃の耐久性を向上させるには、左右のコーナ面取が鋸刃中心線に対して左右対称になるように、専用の研磨装置によって硬質チップを高精度に研磨する必要がある。そのため、硬質チップ帯鋸刃のベベル歯の枚数が増えると、硬質チップ帯鋸刃の製造時間が長くなって、硬質チップ帯鋸刃の製造コストが増大する。つまり、硬質チップ帯鋸刃の耐久性を向上させつつ、硬質チップ帯鋸刃の製造コストの低減を図ることは容易でないという問題がある。 By the way, the left and right corner chamfers are the center of the saw blade in order to improve the durability of the hard tip band saw blade by equalizing the left and right cutting resistance of the bevel teeth and suppressing the bending of the workpiece material (metal workpiece). It is necessary to polish the hard chip with high accuracy by a dedicated polishing apparatus so as to be symmetrical with respect to the line. Therefore, when the number of bevel teeth of the hard tip band saw blade increases, the manufacturing time of the hard tip band saw blade becomes longer, and the manufacturing cost of the hard tip band saw blade increases. That is, there is a problem that it is not easy to reduce the manufacturing cost of the hard chip band saw blade while improving the durability of the hard chip band saw blade.
　従って、本発明は、前述の問題を解決することができる、新規な構成のアサリ歯の硬質チップ帯鋸刃を提供すること、即ち耐久性を向上させつつ、製造コストの低減を十分に図ることができる硬質チップ帯鋸刃を提供することを目的とする。 Therefore, the present invention can provide a hard tooth band saw blade having a novel configuration that can solve the above-described problems, that is, it can sufficiently reduce the manufacturing cost while improving the durability. An object of the present invention is to provide a hard chip band saw blade that can be used.
　本願発明者は、構成の異なる複数種のアサリ歯の硬質チップ帯鋸刃を試作し、複数種の硬質チップ帯鋸刃を用いて、複数の切削試験を行った結果、新規な知見を得ることができ、本発明の完成に至った。ここで、新規な知見とは、右アサリ歯及び左アサリ歯が突縁部をそれぞれ有してあっても、右アサリ歯の歯先及び左アサリ歯の歯先に歯先面取を歯先縁（歯先稜線）に沿ってそれぞれ形成し、鋸歯グループにおける鋸歯の総枚数に対する右アサリ歯及び左アサリ歯の枚数の割合を適切な範囲内において設定することにより、ワーク材の切れ曲がり及び硬質チップ帯鋸刃のチッピングを十分に抑制できるということである。 The inventor of the present application prototyped hard chip band saw blades of multiple types of set teeth with different configurations, and obtained a new knowledge as a result of performing a plurality of cutting tests using a plurality of types of hard chip band saw blades. The present invention has been completed. Here, the new knowledge is that, even if the right and left set teeth have protrusions, the tip of the tip of the right set tooth and the tip of the left set tooth are chamfered. By forming the ratio of the number of right set teeth and left set teeth to the total number of saw teeth in the saw tooth group within an appropriate range. This means that chipping of the chip band saw blade can be sufficiently suppressed.
　本発明の一側面によると、先行歯（先行する鋸歯）としての直歯と、後続歯（後続する鋸歯）としての右アサリ歯及び左アサリ歯を含む鋸歯組み合わせパターン（blade teeth combination pattern）からなる鋸歯グループを繰り返して備え、前記直歯、前記右アサリ歯、及び前記左アサリ歯は、歯先側に、硬質材料からなる硬質チップをそれぞれ有した硬質チップ帯鋸刃であって、前記右アサリ歯の左側コーナ部（左側歯縁部）及び前記左アサリ歯の右側コーナ部（右側歯縁部）は、前記直歯の歯先縁（歯先稜線）に対して切込み方向（切断方向）へ突出した突縁部にそれぞれなっており、前記右アサリ歯の歯先及び前記左アサリ歯の歯先に、歯先面取（チップ面取）が歯先縁に沿ってそれぞれ形成され、前記鋸歯グループにおける鋸歯の総枚数に対する前記右アサリ歯及び前記左アサリ歯の枚数の割合は、７１～８３％に設定されている、硬質チップ帯鋸刃が提供される。
　また、好ましくは、前記直歯の歯先に、歯先面取が歯先縁に沿って形成されている。
　また、好ましくは、前記鋸歯グループにおける鋸歯の総枚数は、５枚以上である。
　また、好ましくは、前記右アサリ歯のアサリ振り出し位置は、前記右アサリ歯における歯底と前記硬質チップの間に位置し、前記左アサリ歯のアサリ振り出し位置は、前記左アサリ歯における歯底と前記硬質チップの間に位置している。
　また、好ましくは、前記歯先面取の帯幅方向に対する面取角は、３５～５５度に設定されている。
　また、好ましくは、前記歯先面取の帯幅方向の面取長さは、０．０３～０．１０ｍｍに設定されている。
　また、好ましくは、前記突縁部の突出量は、０．０２～０．１０ｍｍに設定されている。 According to one aspect of the present invention, the tooth includes a tooth combination pattern including a straight tooth as a leading tooth (preceding saw tooth) and a right set tooth and a left set tooth as a following tooth (following saw tooth). The straight teeth, the right set teeth, and the left set teeth are hard tip band saw blades each having a hard tip made of a hard material on the tooth tip side, and the right set teeth Left corner portion (left tooth edge portion) and right corner portion (right tooth edge portion) of the left set teeth project in the cutting direction (cutting direction) with respect to the straight tooth tip edge (tooth tip ridge line). A tooth chamfer (chip chamfer) is formed along the tooth tip edge at the tooth tip of the right set tooth and the tooth tip of the left set tooth. Against the total number of saw blades A hard chip band saw blade is provided in which the ratio of the number of the right set teeth and the left set teeth is set to 71 to 83%.
Preferably, a tooth chamfer is formed on the tooth tip of the straight tooth along the tooth tip edge.
Preferably, the total number of saw teeth in the saw tooth group is 5 or more.
Preferably, the set-up position of the right set teeth is located between the root of the right set teeth and the hard tip, and the set-up position of the left set teeth is set to the bottom of the left set teeth. Located between the hard chips.
Preferably, the chamfer angle of the tooth chamfer with respect to the band width direction is set to 35 to 55 degrees.
Preferably, the chamfer length in the band width direction of the tooth chamfer is set to 0.03 to 0.10 mm.
Preferably, the protruding amount of the protruding edge is set to 0.02 to 0.10 mm.
　本発明の一側面によると、前述のように、前記右アサリ歯の歯先及び前記左アサリ歯の歯先に、前記歯先面取が歯先縁に沿ってそれぞれ形成され、前記鋸歯グループにおける鋸歯の総枚数に対する前記右アサリ歯及び前記左アサリ歯の枚数の割合は、７１～８３％に設定されている。そのため、前記右アサリ歯及び前記左アサリ歯が前記突縁部を有してあっても、ワーク材（金属ワーク）の切れ曲がり及び前記硬質チップ帯鋸刃のチッピングを十分に抑制することができる。換言すれば、前記直歯をベベル歯にしなくても、ワーク材の切れ曲がり及び前記硬質チップ帯鋸刃のチッピングを十分に抑制することができる。 According to an aspect of the present invention, as described above, the tooth chamfering is formed along the tooth tip edge at the tooth tip of the right set tooth and the tooth tip of the left set tooth, respectively, in the saw tooth group. The ratio of the number of right and left set teeth to the total number of saw teeth is set to 71 to 83%. Therefore, even if the right set teeth and the left set teeth have the protruding edge portion, it is possible to sufficiently suppress the bending of the work material (metal work) and the chipping of the hard chip band saw blade. In other words, even if the straight teeth are not beveled, it is possible to sufficiently suppress bending of the workpiece material and chipping of the hard chip band saw blade.
　本発明によれば、前述のように、前記直歯をベベル歯にしなくても、ワーク材の切れ曲がり及び前記硬質チップ帯鋸刃のチッピングを十分に抑制することができる。これにより、本発明は、前記硬質チップ帯鋸刃の耐久性を向上させつつ、前記硬質チップ帯鋸刃の製造時間を大幅に短縮して、前記硬質チップ帯鋸刃の製造コストの低減を十分に図ることができる。 According to the present invention, as described above, it is possible to sufficiently suppress the bending of the workpiece material and the chipping of the hard chip band saw blade without using the straight teeth as bevel teeth. Thus, the present invention can significantly reduce the manufacturing cost of the hard tip band saw blade by significantly reducing the manufacturing time of the hard tip band saw blade while improving the durability of the hard tip band saw blade. Can do.
図１（ａ）は、本発明の第１実施形態に係る硬質チップ帯鋸刃の一部の左側面部、図１（ｂ）は、本発明の第１実施形態に係る硬質チップ帯鋸刃の一部を刃先側（歯先側）から見た図、図１（ｃ）は、本発明の第１実施形態に係る硬質チップ帯鋸刃の一部の断面図である。FIG. 1A is a left side portion of a part of the hard tip band saw blade according to the first embodiment of the present invention, and FIG. 1B is a part of the hard tip band saw blade according to the first embodiment of the present invention. FIG. 1C is a cross-sectional view of a part of the hard tip band saw blade according to the first embodiment of the present invention. 図２（ａ）は、図１（ｃ）の拡大図、図２（ｂ）は、硬質チップの歯先に形成された歯先面取を示す拡大図である。Fig.2 (a) is an enlarged view of FIG.1 (c), FIG.2 (b) is an enlarged view which shows the tooth tip chamfering formed in the tooth tip of the hard tip. 図３（ａ）は、本発明の第２実施形態に係る硬質チップ帯鋸刃の一部の左側面部、図２（ｂ）は、本発明の第２実施形態に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図２（ｃ）は、本発明の第２実施形態に係る硬質チップ帯鋸刃の一部の断面図である。FIG. 3A is a left side portion of a part of the hard tip band saw blade according to the second embodiment of the present invention, and FIG. 2B is a part of the hard tip band saw blade according to the second embodiment of the present invention. FIG. 2C is a cross-sectional view of a part of the hard tip band saw blade according to the second embodiment of the present invention. 図４（ａ）は、本発明の第３実施形態に係る硬質チップ帯鋸刃の一部の左側面部、図４（ｂ）は、本発明の第３実施形態に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図４（ｃ）は、本発明の第３実施形態に係る硬質チップ帯鋸刃の一部の断面図である。4A is a left side surface portion of a part of the hard tip band saw blade according to the third embodiment of the present invention, and FIG. 4B is a part of the hard tip band saw blade according to the third embodiment of the present invention. FIG. 4C is a sectional view of a part of the hard tip band saw blade according to the third embodiment of the present invention. 図５（ａ）は、本発明の第４実施形態に係る硬質チップ帯鋸刃の一部の左側面部、図５（ｂ）は、本発明の第４実施形態に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図５（ｃ）は、本発明の第４実施形態に係る硬質チップ帯鋸刃の一部の断面図である。FIG. 5A is a left side portion of a part of the hard chip band saw blade according to the fourth embodiment of the present invention, and FIG. 5B is a part of the hard chip band saw blade according to the fourth embodiment of the present invention. FIG. 5C is a cross-sectional view of a part of the hard tip band saw blade according to the fourth embodiment of the present invention. 図６は、本発明に適用可能な鋸歯グループの鋸歯組み合わせパターンを示す図である。FIG. 6 is a diagram showing a sawtooth combination pattern of a sawtooth group applicable to the present invention. 図７（ａ）は、比較例１に係る硬質チップ帯鋸刃の一部の左側面部、図７（ｂ）は、比較例１に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図７（ｃ）は、比較例１に係る硬質チップ帯鋸刃の一部の断面図である。FIG. 7A is a left side portion of a part of the hard tip band saw blade according to Comparative Example 1, and FIG. 7B is a view of a part of the hard tip band saw blade according to Comparative Example 1 as viewed from the blade edge side. FIG. 7C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 1. 図８（ａ）は、比較例２に係る硬質チップ帯鋸刃の一部の左側面部、図８（ｂ）は、比較例２に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図８（ｃ）は、比較例２に係る硬質チップ帯鋸刃の一部の断面図である。8A is a left side surface portion of a part of the hard tip band saw blade according to Comparative Example 2, and FIG. 8B is a view of a part of the hard tip band saw blade according to Comparative Example 2 as viewed from the blade edge side. FIG. 8C is a cross-sectional view of a part of the hard tip band saw blade according to the second comparative example. 図９（ａ）は、比較例３に係る硬質チップ帯鋸刃の一部の左側面部、図９（ｂ）は、比較例３に係る硬質チップ帯鋸刃の一部を歯先側から見た図、図９（ｃ）は、比較例３に係る硬質チップ帯鋸刃の一部の断面図である。9A is a left side portion of a part of the hard tip band saw blade according to Comparative Example 3, and FIG. 9B is a view of a part of the hard tip band saw blade according to Comparative Example 3 as viewed from the tooth tip side. FIG. 9C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 3. 図１０（ａ）は、比較例４に係る硬質チップ帯鋸刃の一部の左側面部、図１０（ｂ）は、比較例４に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図１０（ｃ）は、比較例４に係る硬質チップ帯鋸刃の一部の断面図である。10 (a) is a left side portion of a part of the hard tip band saw blade according to Comparative Example 4, and FIG. 10 (b) is a view of a part of the hard tip band saw blade according to Comparative Example 4 as viewed from the blade edge side. FIG. 10C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 4. 図１１（ａ）は、比較例５に係る硬質チップ帯鋸刃の一部の左側面部、図１１（ｂ）は、比較例５に係る硬質チップ帯鋸刃の一部を刃先側から見た図、図１１（ｃ）は、比較例５に係る硬質チップ帯鋸刃の一部の断面図である。FIG. 11A is a left side surface of a part of the hard tip band saw blade according to Comparative Example 5, and FIG. 11B is a view of a part of the hard tip band saw blade according to Comparative Example 5 as viewed from the blade edge side. FIG. 11C is a cross-sectional view of a part of the hard tip band saw blade according to the comparative example 5. 図１２は、第１の切削試験の結果として、１０カット時における切粉の幅、チッピングの有無、及び切削抵抗の比率を示す表である。FIG. 12 is a table showing, as a result of the first cutting test, the ratio of chip width, chipping presence, and cutting resistance at the time of 10 cuts. 図１３は、第１の切削試験の結果として、カット数とワーク材の切れ曲がり量との関係を示すグラフである。FIG. 13 is a graph showing the relationship between the number of cuts and the amount of bending of the workpiece as a result of the first cutting test. 図１４は、第２及び第３の切削試験の結果として、３２カット時におけるチッピング数を示すグラフである。FIG. 14 is a graph showing the number of chippings at the time of 32 cuts as a result of the second and third cutting tests.
　本発明の実施形態（第１～第４実施形態）について図面を参照して説明する。 Embodiments (first to fourth embodiments) of the present invention will be described with reference to the drawings.
　なお、本願の明細書及び請求の範囲において、「左右方向」とは、硬質チップ帯鋸刃の刃先（歯先）を下向きにした状態で、鋸刃進行方向（硬質チップ帯鋸刃の進行方向）から見て左右方向のことを指す。「先行する」とは、鋸刃進行方向から見て先行することを指し、「後続する」とは、鋸刃進行方向から見て後続することを指す。「鋸刃中心線」とは、硬質チップ帯鋸刃の左右方向の中心を通る線のことを指す。「ワーク材（金属ワーク）の切れ曲がり」とは、硬質チップ帯鋸刃の撓み等によってワーク材の切断面が球面状又は斜面状等になる現象のことを指す。図面中、「Ｌ」は、左方向、「Ｒ」は、右方向、「Ｆ」は、鋸刃進行方向、「Ｓ」は、硬質チップ帯鋸刃の切込み方向、「Ｗ」は、硬質チップ帯鋸刃の帯幅方向（鋸幅方向）をそれぞれ指している。 In the specification and claims of the present application, the “left-right direction” means that the cutting edge (tooth tip) of the hard chip band saw blade is facing downward, and the direction from the saw blade traveling direction (the traveling direction of the hard chip band saw blade). Refers to the left and right direction. “Preceding” refers to preceding in the saw blade traveling direction, and “following” refers to following in the saw blade traveling direction. The “saw blade center line” refers to a line passing through the center in the left-right direction of the hard chip band saw blade. “Cutting of a work material (metal work)” refers to a phenomenon in which a cut surface of a work material becomes spherical or inclined due to bending of a hard chip band saw blade or the like. In the drawings, “L” is the left direction, “R” is the right direction, “F” is the saw blade traveling direction, “S” is the cutting direction of the hard tip band saw blade, and “W” is the hard tip band saw. The band width direction (saw width direction) of the blade is indicated respectively.
　（第１実施形態）
　図１（ａ）（ｂ）（ｃ）に示すように、第１実施形態に係る硬質チップ帯鋸刃１０は、帯鋸盤（図示省略）によってワーク材（図示省略）の切削加工を行う際に用いられる。また、硬質チップ帯鋸刃１０の胴部は、強靱性の高い合金鋼からなる。 (First embodiment)
As shown in FIGS. 1A, 1B, and 1C, the hard tip band saw blade 10 according to the first embodiment is used when a workpiece material (not shown) is cut by a band saw machine (not shown). It is done. Moreover, the trunk | drum of the hard chip | tip band saw blade 10 consists of alloy steel with high toughness.
　硬質チップ帯鋸刃１０は、所定の第１の鋸歯組み合わせパターン（鋸歯の組み合わせ）からなる鋸歯グループ１２を繰り返して備えている。鋸歯グループ１２は、先行歯（先行する鋸歯）としての直歯１４と、直歯１４の後続歯（後続する鋸歯）としての右アサリ歯１６及び左アサリ歯１８と、左アサリ歯１８の後続歯としての右アサリ歯２０とを含んでいる。また、鋸歯グループ１２は、右アサリ歯２０の後続歯としての直歯２２と、直歯２２の後続歯としての左アサリ歯２４及び右アサリ歯２６と、右アサリ歯２６の後続歯としての左アサリ歯２８とを含んでいる。 The hard chip band saw blade 10 is repeatedly provided with a sawtooth group 12 composed of a predetermined first sawtooth combination pattern (sawtooth combination). The sawtooth group 12 includes a straight tooth 14 as a leading tooth (preceding sawtooth), a right set tooth 16 and a left set tooth 18 as a succeeding tooth (following saw tooth) of the straight tooth 14, and a succeeding tooth of the left set tooth 18. And the right set teeth 20. Further, the sawtooth group 12 includes a straight tooth 22 as a succeeding tooth of the right set tooth 20, a left set tooth 24 and a right set tooth 26 as a succeeding tooth of the straight tooth 22, and a left tooth as a succeeding tooth of the right set tooth 26. And clam teeth 28.
　つまり、鋸歯グループ１２は、直歯１４、右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、直歯２２、左アサリ歯２４、右アサリ歯２６、及び左アサリ歯２８の８枚の鋸歯により構成されている。鋸歯グループ１２における右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯２４、右アサリ歯２６、及び左アサリ歯２８は、鋸刃進行方向に沿って交互に配置されている。鋸歯グループ１２における鋸歯の枚数を８枚、換言すれば、５枚以上にしたのは、鋸歯グループ１２の枚数が４枚以下であると、鋸歯グループ１２の鋸歯組み合わせパターンが単調になり、ビビリ振動が発生することが懸念されるからである。 That is, the sawtooth group 12 includes eight sawtooth teeth including a straight tooth 14, a right set tooth 16, a left set tooth 18, a right set tooth 20, a straight tooth 22, a left set tooth 24, a right set tooth 26, and a left set tooth 28. It is comprised by. The right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 24, the right set teeth 26, and the left set teeth 28 in the saw tooth group 12 are alternately arranged along the saw blade traveling direction. The number of saw blades in the saw tooth group 12 is eight, in other words, five or more. If the number of saw blade groups 12 is four or less, the saw tooth combination pattern of the saw tooth group 12 becomes monotonous and chatter vibrations. This is because there is a concern that this will occur.
　直歯１４（２２）は、歯先側に、超硬合金（例えば炭化タングステンやコバルトを含有する超硬合金と呼ばれる硬質材料）からなる硬質チップ１４Ｔ（２２Ｔ）を有している。右アサリ歯１６（２０，２６）は、歯先側に、超硬合金からなる硬質チップ１６Ｔ（２０Ｔ，２６Ｔ）を有している。左アサリ歯１８（２４，２８）は、歯先側に、超硬合金からなる硬質チップ１８Ｔ（２４Ｔ，２８Ｔ）を有している。なお、超硬合金を硬質チップ１４Ｔ等の構成材料にする代わりに、炭化チタン等が添加された超硬合金、又は炭化タングステン等を含有するサーメット等の他の硬質材料を硬質チップ１４Ｔ等の構成材料にしてもよい。 The straight tooth 14 (22) has a hard tip 14T (22T) made of a cemented carbide (for example, a hard material called cemented carbide containing tungsten carbide or cobalt) on the tooth tip side. The right set teeth 16 (20, 26) have hard tips 16T (20T, 26T) made of cemented carbide on the tooth tip side. The left set teeth 18 (24, 28) have hard tips 18T (24T, 28T) made of cemented carbide on the tooth tip side. Instead of using cemented carbide as a constituent material for the hard tip 14T or the like, other hard materials such as cemented carbide to which titanium carbide or the like is added or cermet containing tungsten carbide or the like are used for the construction of the hard tip 14T or the like. It may be a material.
　右アサリ歯１６（２０）及び左アサリ歯１８は、鋸刃中心線Ｍに対して左右対称になっている。左アサリ歯２４（２８）及び右アサリ歯２６は、鋸刃中心線Ｍに対して左右対称になっている。また、右アサリ歯１６（２０，２６）の振り出し量（左右方向外側への振り出し量）及び左アサリ歯１８（２４，２８）の振り出し量は、それぞれ同じに設定されている。右アサリ歯１６（２０，２６）のアサリ振り出し位置（アサリ曲げ加工位置）は、右アサリ歯１６（２０，２６）における歯底と硬質チップ１６Ｔ（２０Ｔ，２６Ｔ）の間に位置している。左アサリ歯１８（２４，２８）のアサリ振り出し位置は、左アサリ歯１８（２４，２８）における歯底と硬質チップ１８Ｔ（２４Ｔ，２８Ｔ）の間に位置している。 The right set teeth 16 (20) and the left set teeth 18 are symmetrical with respect to the sawtooth center line M. The left set teeth 24 (28) and the right set teeth 26 are symmetrical with respect to the sawtooth center line M. Further, the amount of swinging out of the right set teeth 16 (20, 26) (the amount of swinging outward in the left-right direction) and the amount of swinging out of the left set teeth 18 (24, 28) are set to be the same. The set-out position (claw bending position) of the right set teeth 16 (20, 26) is located between the root of the right set teeth 16 (20, 26) and the hard tip 16T (20T, 26T). The set-out position of the left set teeth 18 (24, 28) is located between the root of the left set teeth 18 (24, 28) and the hard tip 18T (24T, 28T).
　右アサリ歯１６（２０，２６）のアサリ振り出し及び左アサリ歯１８（２４，２８）のアサリ振り出しは、硬質チップ帯鋸刃１０の製造の最終工程で行うようになっている。そして、アサリ振り出しを行う前における右アサリ歯１６（２０，２６）の形状は、直歯１４（２２）と同形状になっている。アサリ振り出しを行う前における左アサリ歯１８（２４，２８）の形状は、直歯１４（２２）と同形状になっている。換言すれば、アサリ振り出しを行う前における各鋸歯は、同形状になっている。 The clashes out of the right set teeth 16 (20, 26) and the claws out of the left set teeth 18 (24, 28) are performed in the final process of manufacturing the hard chip band saw blade 10. The shape of the right set teeth 16 (20, 26) before the set-out operation is the same as the straight teeth 14 (22). The shape of the left set teeth 18 (24, 28) before the set-out operation is the same as the straight teeth 14 (22). In other words, the saw teeth before the clashes are formed have the same shape.
　図１（ｃ）及び図２（ａ）に示すように、右アサリ歯１６（２０，２６）の硬質チップ１６Ｔ（２０Ｔ，２６Ｔ）の左側コーナ部（左側歯縁部）は、直歯１４（２２）の歯先縁（歯先稜線）に対して切込み方向（切断方向）へ突出した突縁部Ｂになっている。また、左アサリ歯１８（２４，２８）の硬質チップ１８Ｔ（２４Ｔ，２８Ｔ）の右側コーナ部（右側歯縁部）は、直歯１４（２２）の歯先縁に対して切込み方向へ突出した突縁部Ｂになっている。 As shown in FIGS. 1C and 2A, the left corner portion (left tooth edge portion) of the hard tip 16T (20T, 26T) of the right set teeth 16 (20, 26) is a straight tooth 14 ( 22) is a projecting edge portion B projecting in the cutting direction (cutting direction) with respect to the tooth tip edge (tooth tip ridge line). The right corner portion (right tooth edge portion) of the hard tip 18T (24T, 28T) of the left set tooth 18 (24, 28) protrudes in the cutting direction with respect to the tooth tip edge of the straight tooth 14 (22). It is a protruding portion B.
　突縁部Ｂの突出量ｊは、０．０２～０．１０ｍｍに設定されている。突縁部Ｂの突出量を０．０２ｍｍ以上に設定したのは、０．０２ｍｍ未満であると、突縁部Ｂが直歯１４（２２）によって生成される切粉を安定的に分断することが困難になるからである。突縁部Ｂの突出量を０．１０ｍｍ以下に設定したのは、０．１０ｍｍを超えると、突縁部Ｂに働く切削抵抗（負荷）が大きくなって、チッピングが生じ易くなるからである。 The protruding amount j of the protruding edge B is set to 0.02 to 0.10 mm. The protrusion amount of the projecting edge portion B is set to 0.02 mm or more. When the projecting edge portion B is less than 0.02 mm, the projecting edge portion B stably severes the chips generated by the straight teeth 14 (22). This is because it becomes difficult. The reason why the protruding amount of the protruding portion B is set to 0.10 mm or less is that when the protruding amount exceeds 0.10 mm, the cutting resistance (load) acting on the protruding portion B increases and chipping is likely to occur.
　ここで、前述のように、鋸歯グループ１２における鋸歯の総枚数に対する右アサリ歯１６，２０，２６及び左アサリ歯１８，２４，２８の枚数の割合（以下、適宜にアサリ歯の割合という）は、７５％（６÷８＝０．７５）に設定されている。鋸歯グループ１２におけるアサリ歯の割合を７１％以上に設定したのは、７１％未満であると、突縁部Ｂの個数が少なくなって、硬質チップ帯鋸刃１０の切削抵抗が高くなるからである。鋸歯グループ１２におけるアサリ歯の割合を８３％以下に設定したのは、８３％を超えると、直歯１４（２２）の枚数が少なくなって、硬質チップ帯鋸刃１０の直進安定性の低下が懸念されるからである。 Here, as described above, the ratio of the number of right set teeth 16, 20, 26 and left set teeth 18, 24, 28 to the total number of saw teeth in the saw tooth group 12 (hereinafter referred to as the ratio of set teeth as appropriate) is as follows. 75% (6 ÷ 8 = 0.75). The reason why the set teeth in the sawtooth group 12 is set to 71% or more is that when it is less than 71%, the number of the projecting edge portions B is reduced and the cutting resistance of the hard chip band saw blade 10 is increased. . The ratio of the set teeth in the sawtooth group 12 is set to 83% or less. If the ratio exceeds 83%, the number of straight teeth 14 (22) decreases, and there is a concern that the straight running stability of the hard tip band saw blade 10 may be reduced. Because it is done.
　図１（ａ）（ｂ）（ｃ）に示すように、直歯１４（２２）の硬質チップ１４Ｔ（２２Ｔ）の歯先には、歯先面取（チップ面取）Ｃが歯先縁（歯先稜線）に沿って形成されている。また、右アサリ歯１６（２０，２６）の硬質チップ１６Ｔ（２０Ｔ，２６Ｔ）の歯先には、歯先面取Ｃが歯先縁に沿って形成されている。左アサリ歯１８（２４，２８）の硬質チップ１８Ｔ（２４Ｔ，２８Ｔ）の歯先には、歯先面取Ｃが歯先縁に沿って形成されている。なお、直歯１４（２２）の硬質チップ１４Ｔ（２２Ｔ）の歯先に歯先面取Ｃを形成しなくてもよい。 As shown in FIGS. 1 (a), (b), and (c), a tooth tip chamfering (chip chamfering) C is provided on the tooth tip of the hard tip 14T (22T) of the straight tooth 14 (22). It is formed along the tooth tip ridgeline. Further, a tooth tip chamfer C is formed along the tooth tip edge on the tooth tip of the hard tip 16T (20T, 26T) of the right set tooth 16 (20, 26). On the tooth tip of the hard tip 18T (24T, 28T) of the left set tooth 18 (24, 28), a tooth chamfer C is formed along the tooth tip edge. In addition, it is not necessary to form the tooth chamfer C on the tooth tip of the hard tip 14T (22T) of the straight tooth 14 (22).
　図２（ｂ）に示すように、歯先面取Ｃの帯幅方向（鋸幅方向）に対する面取角θは、３５～５５度に設定されている。歯先面取Ｃの帯幅方向に対する面取角θを３５度以上に設定したのは、３５度未満であると、直歯１４、右アサリ歯１６、及び左アサリ歯１８等の鋸歯の歯先強度を十分に確保することができず、チッピングが生じ易くなるからである。歯先面取Ｃの帯幅方向に対する面取角θを５５度以下に設定したのは、５５度を超えると、鋸歯の切削抵抗が増大して、ワーク材の切削が困難になるからである。 As shown in FIG. 2B, the chamfering angle θ of the tooth chamfer C with respect to the band width direction (saw width direction) is set to 35 to 55 degrees. When the chamfering angle θ of the tooth chamfering C with respect to the band width direction is set to 35 degrees or more, if it is less than 35 degrees, the teeth of saw teeth such as the straight teeth 14, the right set teeth 16 and the left set teeth 18 This is because the tip strength cannot be sufficiently secured and chipping is likely to occur. The reason why the chamfering angle θ of the tooth chamfering C with respect to the band width direction is set to 55 degrees or less is that when the chamfering angle θ exceeds 55 degrees, the cutting resistance of the sawtooth increases and it becomes difficult to cut the workpiece. .
　歯先面取Ｃの帯幅方向の面取長さｋは、０．０３～０．１０ｍｍに設定されている。歯先面取Ｃの帯幅方向の面取長さｋを０．０３ｍｍ以上に設定したのは、０．０３ｍｍ未満であると、鋸歯の歯先強度を十分に確保することができず、チッピングが生じ易くなるからである。歯先面取Ｃの帯幅方向の面取長さｋを０．１０ｍｍ以下に設定したのは、０．１０ｍｍを超えると、鋸歯の切削抵抗が増大して、ワーク材の切削が困難になるからである。 The chamfer length k in the band width direction of the tooth chamfer C is set to 0.03 to 0.10 mm. The chamfer length k in the width direction of the tooth chamfering C is set to 0.03 mm or more. If the chamfering length k is less than 0.03 mm, the tooth tooth strength of the sawtooth cannot be sufficiently secured, and chipping is performed. It is because it becomes easy to occur. The chamfering length k in the band width direction of the tooth chamfering C is set to 0.10 mm or less. If the chamfering length k exceeds 0.10 mm, the cutting resistance of the sawtooth increases and it becomes difficult to cut the workpiece material. Because.
　続いて、第１実施形態の作用及び効果について説明する。 Subsequently, functions and effects of the first embodiment will be described.
　右アサリ歯１６（２０，２６）の硬質チップ１６Ｔ（２０Ｔ，２６Ｔ）の歯先、及び左アサリ歯１８（２４，２８）の硬質チップ１８Ｔ（２４Ｔ，２８Ｔ）の歯先には、歯先面取Ｃが歯先縁に沿ってそれぞれ形成されている。また、鋸歯グループ１２におけるアサリ歯の割合は、７１％～８３％に設定されている。そのため、右アサリ歯１６（２０，２６）及び左アサリ歯１８（２４，２８）が突縁部Ｂを有してあっても、ワーク材の切れ曲がり及び硬質チップ帯鋸刃１０のチッピングを十分に抑制することができる。換言すれば、直歯１４（２２）をベベル歯にしなくても、ワーク材の切れ曲がり及び硬質チップ帯鋸刃１０のチッピングを十分に抑制することができる。特に、直歯１４（２２）の硬質チップ１４Ｔ（２２Ｔ）の歯先に歯先面取Ｃが歯先縁に沿って形成されているため、直歯１４（２２）の歯先強度を十分に確保して、ワーク材の切れ曲がり及び硬質チップ帯鋸刃１０のチッピングをより十分に抑制することができる。 Tooth tips of the hard tips 16T (20T, 26T) of the right set teeth 16 (20, 26) and the tips of the hard tips 18T (24T, 28T) of the left set teeth 18 (24, 28) A take C is formed along the tooth tip edge. Further, the ratio of the set teeth in the sawtooth group 12 is set to 71% to 83%. Therefore, even if the right set teeth 16 (20, 26) and the left set teeth 18 (24, 28) have the projecting edges B, the workpiece material is sufficiently bent and the hard chip band saw blade 10 is sufficiently chipped. Can be suppressed. In other words, even if the straight tooth 14 (22) is not beveled, it is possible to sufficiently suppress bending of the workpiece material and chipping of the hard tip band saw blade 10. In particular, since the tip chamfer C is formed along the tip edge of the tip of the hard tip 14T (22T) of the straight tooth 14 (22), the tip tip strength of the straight tooth 14 (22) is sufficiently high. It is possible to more sufficiently suppress the bending of the work material and the chipping of the hard chip band saw blade 10.
　従って、第１実施形態によれば、硬質チップ帯鋸刃１０の耐久性を向上させつつ、硬質チップ帯鋸刃１０の製造時間を大幅に短縮して、硬質チップ帯鋸刃１０の製造コストの低減を十分に図ることができる。特に、アサリ振り出しを行う前における各鋸歯が同形状になっているため、硬質チップ帯鋸刃１０の製造の効率化を図って、硬質チップ帯鋸刃１０の製造コストの低減をより十分に図ることができる。 Therefore, according to the first embodiment, while improving the durability of the hard tip band saw blade 10, the manufacturing time of the hard tip band saw blade 10 is significantly shortened, and the manufacturing cost of the hard tip band saw blade 10 is sufficiently reduced. Can be aimed at. In particular, since each of the saw blades before carrying out the clasping operation has the same shape, it is possible to improve the manufacturing efficiency of the hard tip band saw blade 10 and to sufficiently reduce the manufacturing cost of the hard tip band saw blade 10. it can.
　（第２実施形態）
　図３（ａ）（ｂ）（ｃ）に示すように、第２実施形態に係る硬質チップ帯鋸刃３０は、第１実施形態に係る硬質チップ帯鋸刃１０（図１参照）と同様の構成を有している。以下、硬質チップ帯鋸刃３０の構成のうち、主として硬質チップ帯鋸刃１０と異なる構成について説明する。なお、硬質チップ帯鋸刃３０における複数の構成要素のうち、硬質チップ帯鋸刃１０における構成要素と対応するものについては、図面中に同一符号を付してある。 (Second Embodiment)
As shown in FIGS. 3A, 3B, and 3C, the hard chip band saw blade 30 according to the second embodiment has the same configuration as the hard chip band saw blade 10 according to the first embodiment (see FIG. 1). Have. Hereinafter, among the configurations of the hard tip band saw blade 30, configurations different from the hard tip band saw blade 10 will be mainly described. In addition, about the component corresponding to the component in the hard chip | tip band saw blade 10 among the some components in the hard chip | tip band saw blade 30, the same code | symbol is attached | subjected in drawing.
　硬質チップ帯鋸刃３０は、所定の第２の鋸歯組み合わせパターンからなる鋸歯グループ３２を繰り返して備えている。鋸歯グループ３２は、第１実施形態に係る硬質チップ帯鋸刃１０における鋸歯グループ１２から直歯２２、右アサリ歯２６、及び左アサリ歯２８を除外している。 The hard chip band saw blade 30 is repeatedly provided with a sawtooth group 32 composed of a predetermined second sawtooth combination pattern. The sawtooth group 32 excludes the straight teeth 22, the right set teeth 26, and the left set teeth 28 from the saw tooth group 12 in the hard tip band saw blade 10 according to the first embodiment.
　つまり、鋸歯グループ３２は、直歯１４、右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、及び左アサリ歯２４の５枚の鋸歯から構成されている。鋸歯グループ３２における右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、及び左アサリ歯２４は、鋸刃進行方向に沿って交互に配置されている。鋸歯グループ３２におけるアサリ歯の割合は、８０％（４÷５＝０．８０）に設定されている。換言すれば、鋸歯グループ３２におけるアサリ歯の割合は、７１％～８３％に設定されている。 That is, the sawtooth group 32 is composed of five sawtooths of the straight tooth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, and the left set teeth 24. The right set teeth 16, the left set teeth 18, the right set teeth 20, and the left set teeth 24 in the saw tooth group 32 are alternately arranged along the saw blade traveling direction. The ratio of the set teeth in the sawtooth group 32 is set to 80% (4 ÷ 5 = 0.80). In other words, the ratio of the set teeth in the sawtooth group 32 is set to 71% to 83%.
　このような第２実施形態おいても、第１実施形態と同様の作用及び効果を奏する。 Even in the second embodiment, the same operations and effects as in the first embodiment are obtained.
　（第３実施形態）
　図４（ａ）（ｂ）（ｃ）に示すように、第３実施形態に係る硬質チップ帯鋸刃３４は、第１実施形態に係る硬質チップ帯鋸刃１０（図１参照）と同様の構成を有している。以下、硬質チップ帯鋸刃の構成のうち、主として硬質チップ帯鋸刃１０と異なる構成についてのみ説明する。なお、硬質チップ帯鋸刃３４における複数の構成要素のうち、硬質チップ帯鋸刃１０における構成要素と対応するものについては、図面中に同一符号を付してある。 (Third embodiment)
As shown in FIGS. 4A, 4B, and 4C, the hard tip band saw blade 34 according to the third embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have. Hereinafter, only the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade will be described. Of the plurality of constituent elements in the hard tip band saw blade 34, those corresponding to the constituent elements in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
　硬質チップ帯鋸刃３４は、所定の第３の鋸歯組み合わせパターンからなる鋸歯グループ３６を繰り返して備えている。各鋸歯グループ３６は、複数の鋸歯の組み合わせからなる２つの小鋸歯グループ３８，４０によって構成されている。小鋸歯グループ３８は、硬質チップ帯鋸刃１０の鋸歯グループ１２から左アサリ歯２８を除外している。小鋸歯グループ４０は、硬質チップ帯鋸刃１０の鋸歯グループ１２から右アサリ歯２０及び左アサリ歯２４を除外している。小鋸歯グループ４０は、硬質チップ帯鋸刃１０の鋸歯グループ１２における直歯１４と右アサリ歯１６の間に左アサリ歯４２を追加している。左アサリ歯４２は、歯先側に、超硬合金からなる硬質チップ４０Ｔを有しており、左アサリ歯１８（２４，２８）と同様の構成からなっている。 The hard chip band saw blade 34 is repeatedly provided with a sawtooth group 36 having a predetermined third sawtooth combination pattern. Each sawtooth group 36 is constituted by two small sawtooth groups 38 and 40 that are a combination of a plurality of sawtooth. The small sawtooth group 38 excludes the left set teeth 28 from the sawtooth group 12 of the hard tip band saw blade 10. The small sawtooth group 40 excludes the right set teeth 20 and the left set teeth 24 from the sawtooth group 12 of the hard tip band saw blade 10. In the small sawtooth group 40, the left set teeth 42 are added between the straight teeth 14 and the right set teeth 16 in the sawtooth group 12 of the hard tip band saw blade 10. The left set teeth 42 have a hard tip 40T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28).
　つまり、小鋸歯グループ３８は、直歯１４、右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、直歯２２、左アサリ歯２４、及び右アサリ歯２６の７枚の鋸歯により構成されている。小鋸歯グループ４０は、直歯１４、左アサリ歯４２、右アサリ歯１６、左アサリ歯１８、直歯２２、右アサリ歯２６、及び左アサリ歯２８の７枚の鋸歯により構成されている。鋸歯グループ３６は、１４枚の鋸歯により構成されている。また、小鋸歯グループ３８における右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯２４、及び右アサリ歯２６は、鋸刃進行方向に沿って交互に配置されている。小鋸歯グループ４０における左アサリ歯４２、右アサリ歯１６、左アサリ歯１８、右アサリ歯２６、及び左アサリ歯２８は、鋸刃進行方向に沿って交互に配置されている。鋸歯グループ３６におけるアサリ歯の割合は、７１％（１０÷１４＝０．７１）に設定されている。換言すれば、鋸歯グループ３６におけるアサリ歯の割合は、７１％～８３％に設定されている。 That is, the small sawtooth group 38 is composed of seven sawtooth teeth of the straight tooth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, the straight teeth 22, the left set teeth 24, and the right set teeth 26. Yes. The small saw tooth group 40 is composed of seven saw teeth of a straight tooth 14, a left set tooth 42, a right set tooth 16, a left set tooth 18, a straight tooth 22, a right set tooth 26, and a left set tooth 28. The sawtooth group 36 is composed of 14 sawtooth. Further, the right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 24, and the right set teeth 26 in the small saw tooth group 38 are arranged alternately along the saw blade traveling direction. The left set teeth 42, the right set teeth 16, the left set teeth 18, the right set teeth 26, and the left set teeth 28 in the small saw tooth group 40 are alternately arranged along the saw blade traveling direction. The ratio of the set teeth in the sawtooth group 36 is set to 71% (10 ÷ 14 = 0.71). In other words, the ratio of the set teeth in the sawtooth group 36 is set to 71% to 83%.
　このような第３実施形態おいても、第１実施形態と同様の作用及び効果を奏する。 In the third embodiment, the same operations and effects as in the first embodiment are achieved.
　（第４実施形態）
　図５（ａ）（ｂ）（ｃ）に示すように、第４実施形態に係る硬質チップ帯鋸刃４４は、第１実施形態に係る硬質チップ帯鋸刃１０（図１参照）と同様の構成を有している。以下、硬質チップ帯鋸刃４４の構成のうち、主として硬質チップ帯鋸刃１０と異なる構成についてのみ説明する。なお、硬質チップ帯鋸刃４４における複数の構成要素のうち、硬質チップ帯鋸刃１０における構成要素と対応するものについては、図面中に同一符号を付してある。 (Fourth embodiment)
As shown in FIGS. 5A, 5B, and 5C, the hard tip band saw blade 44 according to the fourth embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have. Hereinafter, only the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 44 will be described. Of the plurality of components in the hard tip band saw blade 44, those corresponding to the components in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
　硬質チップ帯鋸刃４４は、所定の第４の鋸歯組み合わせパターンからなる鋸歯グループ４６を繰り返して備えている。鋸歯グループ４６は、硬質チップ帯鋸刃１０の鋸歯グループ１２における右アサリ歯２０と直歯２２の間に、左アサリ歯４８及び右アサリ歯５０を追加している。左アサリ歯４８は、歯先側に、超硬合金からなる硬質チップ４８Ｔを有しており、左アサリ歯１８（２４，２８）と同様の構成からなっている。右アサリ歯５０は、歯先側に、超硬合金からなる硬質チップ５０Ｔを有しており、右アサリ歯１６（２０，２６）と同様の構成からなっている。また、鋸歯グループ４６は、硬質チップ帯鋸刃１０の鋸歯グループ１２における左アサリ歯２８に後続する右アサリ歯５２及び左アサリ歯５４を追加している。右アサリ歯５２は、歯先側に、超硬合金からなる硬質チップ５２Ｔを有しており、右アサリ歯１６（２０，２６）と同様の構成からなっている。左アサリ歯５４は、歯先側に、超硬合金からなる硬質チップ５４Ｔを有しており、左アサリ歯１８（２４，２８）と同様の構成からなっている。 The hard chip band saw blade 44 is repeatedly provided with a sawtooth group 46 having a predetermined fourth sawtooth combination pattern. In the sawtooth group 46, a left set tooth 48 and a right set tooth 50 are added between the right set teeth 20 and the straight teeth 22 in the saw set 12 of the hard tip band saw blade 10. The left set teeth 48 have a hard tip 48T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28). The right set teeth 50 have a hard tip 50T made of cemented carbide on the tooth tip side, and have the same configuration as the right set teeth 16 (20, 26). The saw tooth group 46 further includes a right set tooth 52 and a left set tooth 54 following the left set tooth 28 in the saw tooth group 12 of the hard tip band saw blade 10. The right set teeth 52 have a hard tip 52T made of cemented carbide on the tooth tip side, and have the same configuration as the right set teeth 16 (20, 26). The left set teeth 54 have a hard tip 54T made of cemented carbide on the tooth tip side, and have the same configuration as the left set teeth 18 (24, 28).
　つまり、鋸歯グループ４６は、直歯１４、右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯４８、右アサリ歯５０、直歯２２、左アサリ歯２４、右アサリ歯２６、左アサリ歯２８、右アサリ歯５２、及び左アサリ歯５４の１２枚の鋸歯により構成されている。鋸歯グループ４６における右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯４８、右アサリ歯５０、左アサリ歯２４、右アサリ歯２６、左アサリ歯２８、右アサリ歯５２、及び左アサリ歯５４は、鋸刃進行方向に沿って交互に配置されている。鋸歯グループ４６におけるアサリ歯の割合は、８３％（１０÷１２＝０．８３）に設定されている。換言すれば、鋸歯グループ４６におけるアサリ歯の割合は、７１％～８３％に設定されている。 That is, the sawtooth group 46 includes the straight teeth 14, the right set teeth 16, the left set teeth 18, the right set teeth 20, the left set teeth 48, the right set teeth 50, the straight teeth 22, the left set teeth 24, the right set teeth 26, It consists of twelve saw teeth: a left set tooth 28, a right set teeth 52, and a left set teeth 54. Right set teeth 16, left set teeth 18, right set teeth 20, left set teeth 48, right set teeth 50, left set teeth 24, right set teeth 26, left set teeth 28, right set teeth 52 in the sawtooth group 46, and The left set teeth 54 are alternately arranged along the traveling direction of the saw blade. The ratio of the set teeth in the sawtooth group 46 is set to 83% (10 ÷ 12 = 0.83). In other words, the ratio of the set teeth in the sawtooth group 46 is set to 71% to 83%.
　このような第４実施形態おいても、第１実施形態と同様の作用及び効果を奏する。 In the fourth embodiment, the same operations and effects as in the first embodiment are achieved.
　なお、本発明は、前述の実施形態の説明に限られるものでなく、次のように種々の態様で実施可能である。 The present invention is not limited to the description of the above-described embodiment, and can be implemented in various modes as follows.
　即ち、硬質チップ帯鋸刃１０等における鋸歯グループ１２等の鋸歯組み合わせパターンは前述の所定の第１～第６の鋸歯組み合わせパターンに代えて、図６に示す複数の鋸歯組み合わせパターンのうちいずれかの鋸歯組み合わせパターンに用いてもよい。また、直歯１４を台形状の歯先を有したベベル歯にしてもよい。 That is, the sawtooth combination pattern of the sawtooth group 12 and the like in the hard tip band saw blade 10 and the like is replaced with any one of the plurality of sawtooth combination patterns shown in FIG. 6 in place of the predetermined first to sixth sawtooth combination patterns. You may use for a combination pattern. The straight teeth 14 may be beveled teeth having trapezoidal tips.
　そして、本発明に包含される権利範囲は、前述の実施形態に限定されない。 The scope of rights encompassed by the present invention is not limited to the above-described embodiment.
　次に、本発明の実施例（比較例１～５、実施品１～４、比較品１～５、及び第１～第３の切削試験）について図面を参照して説明する。 Next, examples of the present invention (Comparative Examples 1 to 5, Examples 1 to 4, Comparative Products 1 to 5, and First to Third Cutting Tests) will be described with reference to the drawings.
　なお、図面中、「Ｌ」は、左方向、「Ｒ」は、右方向、「Ｆ」は、硬質チップ帯鋸刃の進行方向をそれぞれ指している。 In the drawings, “L” indicates the left direction, “R” indicates the right direction, and “F” indicates the traveling direction of the hard chip band saw blade.
 （比較例１）
　図７（ａ）（ｂ）（ｃ）に示すように、第５実施形態に係る硬質チップ帯鋸刃５６は、第１実施形態に係る硬質チップ帯鋸刃１０（図１参照）と同様の構成を有している。以下、硬質チップ帯鋸刃５６の構成のうち、硬質チップ帯鋸刃１０と異なる構成についてのみ説明する。なお、硬質チップ帯鋸刃５６における複数の構成要素のうち、硬質チップ帯鋸刃１０における構成要素と対応するものについては、図面中に同一符号を付してある。 (Comparative Example 1)
As shown in FIGS. 7A, 7B, and 7C, the hard tip band saw blade 56 according to the fifth embodiment has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). Have. Hereinafter, only a configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 56 will be described. Of the plurality of constituent elements in the hard tip band saw blade 56, those corresponding to the constituent elements in the hard tip band saw blade 10 are denoted by the same reference numerals in the drawings.
　硬質チップ帯鋸刃５６は、所定の第５の鋸歯組み合わせパターンからなる鋸歯グループ５８を繰り返して備えている。鋸歯グループ５８は、硬質チップ帯鋸刃１０における鋸歯グループ１２から右アサリ歯２０、直歯２２、左アサリ歯２４、右アサリ歯２６、及び左アサリ歯２８を除外している。 The hard chip band saw blade 56 is repeatedly provided with a sawtooth group 58 composed of a predetermined fifth sawtooth combination pattern. The sawtooth group 58 excludes the right set teeth 20, the straight teeth 22, the left set teeth 24, the right set teeth 26, and the left set teeth 28 from the saw tooth group 12 in the hard tip band saw blade 10.
　つまり、鋸歯グループ５８は、直歯１４、右アサリ歯１６、及び左アサリ歯１８の３枚の鋸歯から構成されている。鋸歯グループ５８におけるアサリ歯の割合は、６７％（２÷３＝０．６７）に設定されている。換言すれば、鋸歯グループ５８におけるアサリ歯の割合は、７１％未満に設定されている。 That is, the sawtooth group 58 includes three sawtooths of the straight tooth 14, the right set teeth 16, and the left set teeth 18. The ratio of the set teeth in the sawtooth group 58 is set to 67% (2 ÷ 3 = 0.67). In other words, the ratio of the set teeth in the sawtooth group 58 is set to less than 71%.
　（比較例２）
　 図８（ａ）（ｂ）（ｃ）に示すように、比較例２に係る硬質チップ帯鋸刃６０は、第１実施形態に係る硬質チップ帯鋸刃１０（図１参照）と同様の構成を有している。以下、硬質チップ帯鋸刃６０の構成のうち、硬質チップ帯鋸刃１０と異なる構成についてのみ説明する。なお、硬質チップ帯鋸刃６０における複数の構成要素のうち、硬質チップ帯鋸刃１０における構成要素と対応するものについては、図面中に同一符号を付してある。 (Comparative Example 2)
As shown in FIGS. 8A, 8B, and 8C, the hard tip band saw blade 60 according to Comparative Example 2 has the same configuration as the hard tip band saw blade 10 according to the first embodiment (see FIG. 1). is doing. Hereinafter, only the configuration different from the hard tip band saw blade 10 among the configurations of the hard tip band saw blade 60 will be described. In addition, about the component corresponding to the component in the hard chip | tip band saw blade 10 among several components in the hard chip | tip band saw blade 60, the same code | symbol is attached | subjected in drawing.
　硬質チップ帯鋸刃６０は、所定の第６の鋸歯組み合わせパターンからなる鋸歯グループ６２を繰り返して備えている。鋸歯グループ６２は、硬質チップ帯鋸刃１０における鋸歯グループ１２から直歯２２を除外している。 The hard chip band saw blade 60 is repeatedly provided with a sawtooth group 62 composed of a predetermined sixth sawtooth combination pattern. The sawtooth group 62 excludes the straight teeth 22 from the sawtooth group 12 in the hard tip band saw blade 10.
　つまり、鋸歯グループ６２は、直歯１４、右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯２４、右アサリ歯２６、及び左アサリ歯２８の７枚の鋸歯から構成されている。鋸歯グループ６２における右アサリ歯１６、左アサリ歯１８、右アサリ歯２０、左アサリ歯２４、右アサリ歯２６、及び左アサリ歯２８は、鋸刃進行方向に沿って交互に配置されている。鋸歯グループ６２におけるアサリ歯の割合は、８６％（６÷７＝０．８６）に設定されている。換言すれば、鋸歯グループ５８におけるアサリ歯の割合は、８３％を越えて設定されている。 That is, the sawtooth group 62 is composed of seven sawtooth teeth including a straight tooth 14, a right set tooth 16, a left set teeth 18, a right set teeth 20, a left set teeth 24, a right set teeth 26, and a left set teeth 28. Yes. The right set teeth 16, left set teeth 18, right set teeth 20, left set teeth 24, right set teeth 26, and left set teeth 28 in the saw tooth group 62 are alternately arranged along the saw blade traveling direction. The ratio of the set teeth in the sawtooth group 62 is set to 86% (6 ÷ 7 = 0.86). In other words, the ratio of the set teeth in the sawtooth group 58 is set to exceed 83%.
　（比較例３）
　図９（ａ）（ｂ）（ｃ）に示すように、比較例３に係る硬質チップ帯鋸刃６４は、所定の第５の鋸歯組み合わせパターンからなる鋸歯グループ６６を繰り返して備えている。以下、硬質チップ帯鋸刃６４の構成のうち、比較例１に係る硬質チップ帯鋸刃５６（図７参照）と異なる構成についてのみ簡単に説明する。なお、硬質チップ帯鋸刃６４における複数の構成要素のうち、硬質チップ帯鋸刃５６における構成要素と対応するものについては、図面中に同一符号を付してある。 (Comparative Example 3)
As shown in FIGS. 9A, 9B, and 9C, the hard tip band saw blade 64 according to the comparative example 3 is repeatedly provided with a sawtooth group 66 having a predetermined fifth sawtooth combination pattern. Hereinafter, only a configuration different from the hard tip band saw blade 56 (see FIG. 7) according to the comparative example 1 among the configurations of the hard tip band saw blade 64 will be briefly described. Of the plurality of constituent elements in the hard tip band saw blade 64, those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawings.
　鋸歯グループ６６における右アサリ歯１６及び左アサリ歯１８は、それぞれ突縁部Ｂを有していない。鋸歯グループ６６における直歯１４、右アサリ歯１６、及び左アサリ歯１８は、それぞれ歯先面取Ｃを有していない。また、鋸歯グループ６６における直歯１４の左右の歯先コーナ部には、約４５°のコーナ面取Ｄがそれぞれ形成されている。換言すれば、鋸歯グループ６６における直歯１４は、直歯が台形状の歯先を有したベベル歯になっている。 The right set teeth 16 and the left set teeth 18 in the sawtooth group 66 do not have the projecting edges B, respectively. The straight tooth 14, the right set teeth 16, and the left set teeth 18 in the sawtooth group 66 do not have the tooth chamfer C. Further, corner chamfers D of about 45 ° are formed at the left and right tip corner portions of the straight tooth 14 in the sawtooth group 66, respectively. In other words, the straight tooth 14 in the sawtooth group 66 is a bevel tooth having a trapezoidal tooth tip.
　（比較例４）
　図１０（ａ）（ｂ）（ｃ）に示すように、比較例４に係る硬質チップ帯鋸刃６８は、所定の第５の鋸歯組み合わせパターンからなる鋸歯グループ７０を繰り返して備えている。以下、硬質チップ帯鋸刃６８の構成のうち、比較例１に係る硬質チップ帯鋸刃５６（図７参照）と異なる構成についてのみ簡単に説明する。なお、硬質チップ帯鋸刃６８における複数の構成要素のうち、硬質チップ帯鋸刃５６における構成要素と対応するものについては、図面中に同一符号を付してある。 (Comparative Example 4)
As shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, the hard tip band saw blade 68 according to the comparative example 4 is repeatedly provided with a sawtooth group 70 having a predetermined fifth sawtooth combination pattern. Hereinafter, only a configuration different from the hard tip band saw blade 56 (see FIG. 7) according to the comparative example 1 among the configurations of the hard tip band saw blade 68 will be briefly described. Of the plurality of constituent elements in the hard tip band saw blade 68, those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawings.
　鋸歯グループ７０における右アサリ歯１６及び左アサリ歯１８は、それぞれ突縁部Ｂを有していない。鋸歯グループ７０における直歯１４、右アサリ歯１６、及び左アサリ歯１８は、それぞれ歯先面取Ｃを有していない。 The right set teeth 16 and the left set teeth 18 in the sawtooth group 70 do not have the projecting edges B, respectively. The straight tooth 14, the right set teeth 16, and the left set teeth 18 in the sawtooth group 70 do not have the tooth chamfer C.
　（比較例５）
　図１１（ａ）（ｂ）（ｃ）に示すように、比較例５に係る硬質チップ帯鋸刃７２は、所定の第５の鋸歯組み合わせパターンからなる鋸歯グループ７４を繰り返して備えている。以下、硬質チップ帯鋸刃７２の構成のうち、比較例１に係る硬質チップ帯鋸刃５６（図７参照）と異なる構成についてのみ簡単に説明する。なお、硬質チップ帯鋸刃７２における複数の構成要素のうち、硬質チップ帯鋸刃５６における構成要素と対応するものについては、図面中に同一符号を付してある。 (Comparative Example 5)
As shown in FIGS. 11 (a), 11 (b), and 11 (c), the hard tip band saw blade 72 according to the comparative example 5 is repeatedly provided with a sawtooth group 74 having a predetermined fifth sawtooth combination pattern. Hereinafter, only a configuration different from the hard tip band saw blade 56 according to Comparative Example 1 (see FIG. 7) in the configuration of the hard tip band saw blade 72 will be briefly described. Of the plurality of constituent elements in the hard tip band saw blade 72, those corresponding to the constituent elements in the hard tip band saw blade 56 are denoted by the same reference numerals in the drawing.
　鋸歯グループ７４における直歯１４、右アサリ歯１６、及び左アサリ歯１８は、それぞれ歯先面取Ｃを有していない。 The straight teeth 14, the right set teeth 16 and the left set teeth 18 in the saw tooth group 74 do not have tooth chamfers C, respectively.
　（実施品１～４及び比較品１～５）
　第１実施形態に係る硬質チップ帯鋸刃１０を実施品１として、第２実施形態に係る硬質チップ帯鋸刃３０を実施品２として、第３実施形態に係る硬質チップ帯鋸刃３４を実施品３として、第４実施形態に係る硬質チップ帯鋸刃４４を実施品４として、それぞれ試作する。比較例１に係る硬質チップ帯鋸刃５６を比較品１として、比較例２に係る硬質チップ帯鋸刃６０を比較品２として、比較例３に係る硬質チップ帯鋸刃６４を比較品３として、比較例４に係る硬質チップ帯鋸刃６８を比較品４として、比較例５に係る硬質チップ帯鋸刃７２を比較品５として、それぞれ試作する。実施品１～４及び比較品１～５は、ベースの歯形の掬い角１０度、ベースの歯形の逃げ角２０度、帯幅４１ｍｍ、帯厚（厚み）１．３ｍｍ、帯長４５７０ｍｍ、ピッチ１．８／２Ｐに設定した。実施品１～６及び比較品３は、突縁部の突出量０．０５ｍｍに設定した。実施品１～６は、歯先面取の面取角４５度、歯先面取の面取長さ０．０５ｍｍに設定した。 (Practical products 1 to 4 and comparative products 1 to 5)
The hard chip band saw blade 10 according to the first embodiment is used as the product 1, the hard chip band saw blade 30 according to the second embodiment is used as the product 2, and the hard chip band saw blade 34 according to the third embodiment is used as the product 3. The hard chip band saw blade 44 according to the fourth embodiment is prototyped as an implementation product 4. Comparative Example 1 with Hard Tip Band Saw Blade 56 according to Comparative Example 1 as Comparative Product 1, Hard Chip Band Saw Blade 60 with Comparative Example 2 as Comparative Product 2, and Hard Chip Band Saw Blade 64 with Comparative Example 3 as Comparative Product 3 The hard chip band saw blade 68 according to No. 4 is made as a comparative product 4 and the hard chip band saw blade 72 according to Comparative Example 5 is made as a comparative product 5 as a prototype. Examples 1 to 4 and comparative products 1 to 5 have a base tooth profile with a crease angle of 10 degrees, a base tooth profile with a clearance angle of 20 degrees, a band width of 41 mm, a band thickness (thickness) of 1.3 mm, a band length of 4570 mm, and a pitch of 1. Set to 8 / 2P. In the implementation products 1 to 6 and the comparison product 3, the protrusion amount of the projecting edge portion was set to 0.05 mm. For the products 1 to 6, the chamfering angle of the tooth chamfer was set to 45 degrees and the chamfering length of the tooth chamfering was set to 0.05 mm.
　（第１の切削試験）
　実施品１～６及び比較品１～３を用いて、所定の第１切削条件（鋸速４０ｍ／ｍｉｍ、１カットの切断時間８分）の下で、ステンレス鋼（ＳＵＳ３０４）からなる直径２００ｍｍのワーク材に対して第１の切削試験を行った。 (First cutting test)
Using the execution products 1 to 6 and the comparison products 1 to 3, under a predetermined first cutting condition (saw speed of 40 m / mim, cutting time of 1 cut of 8 minutes), a diameter of 200 mm made of stainless steel (SUS304) is used. A first cutting test was performed on the workpiece material.
　第１の切削試験の結果として、１０カット時における切粉の幅、チッピングの有無、及び切削抵抗の比率（切削抵抗比）についてまとめると、図１２に示すようになる。 As a result of the first cutting test, the width of chips, the presence or absence of chipping at the time of 10 cuts, and the ratio of cutting resistance (cutting resistance ratio) are summarized as shown in FIG.
　即ち、突縁部及び歯先面取を有した実施品１～４を用いた場合には、切粉の幅が帯厚の１／２以下になっており、歯先のチッピングが発生しないことが確認された。突縁部及び歯先面取を有した比較品１、２を用いた場合には、歯先のチッピングは発生せずに、切粉の幅が帯厚の１／２以下になっていることが確認された。これに対して、直歯をベベル歯にした比較品３を用いた場合には、切粉の幅が帯厚に比べて僅かに小さくなっていることが確認されたが、歯先面取りを有していないために歯先のチッピングが発生した。また、突縁部および歯先面取りを有していない比較品４を用いた場合には、切粉の幅が帯厚と略同じになっており、歯先のチッピングが発生していることが確認された。更に、突縁部を有しかつ歯先面取を有しない比較品５を用いた場合には、切粉の幅が帯厚の１／２以下になっていることが確認されたが、歯先のチッピングが発生した。 That is, when working products 1 to 4 having a projecting edge portion and a chamfered tooth tip are used, the chip width is 1/2 or less of the thickness of the band, and tipping of the tooth tip does not occur. Was confirmed. When using comparative products 1 and 2 with a protruding edge and a chamfered tooth tip, chipping of the tooth tip does not occur and the width of the chip is ½ or less of the band thickness. Was confirmed. On the other hand, it was confirmed that when the comparative product 3 with straight teeth beveled was used, the width of the chip was slightly smaller than the thickness of the band, but there was chamfering of the tooth tip. The tipping of the tooth tip occurred because it was not. Moreover, when the comparative product 4 which does not have a protruding part and chamfering of a tooth tip is used, the width of the chip is substantially the same as the thickness of the band, and chipping of the tooth tip occurs. confirmed. Furthermore, it was confirmed that when the comparative product 5 having a protruding portion and no chamfered tooth was used, the width of the chip was ½ or less of the band thickness. The previous chipping occurred.
　実施品１～４を用いた場合の１０カット時における切削抵抗は、従来品である比較品３を用いた場合の１０カット時における切削抵抗と同程度以下であることが確認された。これに対して、比較品１、２、５を用いた場合の１０カット目における切削抵抗は、比較品１を用いた場合の１０カット目における切削抵抗と同程度以下であって、実施品１～４を用いた場合の１０カット目における切削抵抗と同程度であることが確認された。比較品４を用いた場合の１０カット時における切削抵抗は、比較品３を用いた場合の１０カット時における切削抵抗に比べて、大きくなっていることが確認された。なお、切削抵抗の比率は、比較品３を用いた場合の１０カット時における切削抵抗を基準とする比率である。 It was confirmed that the cutting resistance at the time of 10 cuts when using the implemented products 1 to 4 was equal to or less than the cutting resistance at the time of 10 cuts using the comparative product 3 as a conventional product. On the other hand, the cutting resistance at the 10th cut when using the comparative products 1, 2 and 5 is less than or equal to the cutting resistance at the 10th cut when using the comparative product 1, It was confirmed that the cutting resistance was the same as that at the 10th cut when ˜4 was used. It was confirmed that the cutting resistance at the time of 10 cuts when the comparative product 4 was used was larger than the cutting resistance at the time of 10 cuts when the comparative product 3 was used. The ratio of the cutting resistance is a ratio based on the cutting resistance at the time of 10 cuts when the comparative product 3 is used.
　第１の切削試験の結果として、カット数とワーク材の切れ曲がり量との関係をまとめると、図１３に示すようになる。 As a result of the first cutting test, the relationship between the number of cuts and the amount of bending of the workpiece material is summarized as shown in FIG.
　即ち、実施品１～４を用いた場合には、比較品３を用いた場合に比べて、ワーク材の切れ曲がり量を十分に低減して、硬質チップ帯鋸刃の耐久性が向上することが確認できた。これに対して、比較品１、２を用いた場合は、比較品３を用いた場合に比べて、ワーク材の切れ曲がり量がより低減したが、実施品１～４を用いた場合に比べて、明らかに硬質チップ帯鋸刃の耐久性が低下することが確認できた。比較品４、５を用いた場合は、比較品３を用いた場合に比べて、ワーク材の切れ曲がり量が増大して、硬質チップ帯鋸刃の耐久性が低下することが確認できた。なお、第１の切削試験においては、ワーク材の切れ曲がり量が１．０ｍｍ以上になると、硬質チップ帯鋸刃の寿命であるとみなした。 In other words, when working products 1 to 4 are used, the amount of bending of the work material can be sufficiently reduced compared with the case of using comparative product 3, and the durability of the hard chip band saw blade can be improved. It could be confirmed. On the other hand, when the comparative products 1 and 2 were used, the amount of bending of the work material was further reduced as compared with the comparative product 3, but compared with the case where the working products 1 to 4 were used. Thus, it was clearly confirmed that the durability of the hard chip band saw blade was lowered. When the comparative products 4 and 5 were used, it was confirmed that the amount of bending of the workpiece material was increased and the durability of the hard tip band saw blade was lowered as compared with the case of using the comparative product 3. In the first cutting test, when the amount of bending of the workpiece material was 1.0 mm or more, it was regarded as the life of the hard tip band saw blade.
　（第２及び第３の切削試験）
　実施品１～４及び比較品１、５を用いて、所定の第２切削条件（鋸速６０ｍ／ｍｉｍ、１カットの切断時間２．６分）の下で、炭素鋼（Ｓ４５Ｃ）からなる直径２００ｍｍのワーク材に対して第２の切削試験を行った。同様に、所定の第３切削条件（鋸速５５ｍ／ｍｉｍ、１カットの切断時間４．６分）の下で、クロムモリブデン鋼（ＳＣＭ４４０）からなる直径２００ｍｍのワーク材に対して第３の切削試験を行った。 (Second and third cutting tests)
The diameter made of carbon steel (S45C) under the predetermined second cutting conditions (saw speed 60 m / mim, cutting time of 2.6 minutes for cut) using the working products 1 to 4 and the comparative products 1 and 5. A second cutting test was performed on a 200 mm workpiece. Similarly, the third cutting is performed on a workpiece having a diameter of 200 mm made of chromium molybdenum steel (SCM440) under a predetermined third cutting condition (saw speed 55 m / mim, cutting time of one cut 4.6 minutes). A test was conducted.
　第２及び第３の切削試験の結果として、３２カット時におけるチッピング数についてまとめると、図１４に示すようになる。 As a result of the second and third cutting tests, the chipping numbers at the time of 32 cuts are summarized as shown in FIG.
　即ち、第２及び第３の切削試験のいずれの場合においても、突縁部及び歯先面取を有した実施品１～４を用いた場合は、突縁部を有しかつ歯先面取を有していない比較品５を用いた場合に比べて、３２カット時におけるチッピング数を大幅に低減できることが確認できた。特に、第２及び第３の切削試験のいずれの場合においても、実施品１～４を用いた場合は、３２カット時におけるチッピング数をゼロに近づけることが確認できた。これに対して、突縁部及び歯先面取を有した比較品１を用いた場合は、比較品５を用いた場合に比べて、明らかにチッピング数は低減しているが、その効果は十分とは言えず、鋸歯グループにおけるアサリ歯の割合がチッピングに影響することが確認できた。 That is, in both cases of the second and third cutting tests, when the practical products 1 to 4 having the projecting edge portion and the tooth chamfer were used, the product having the projecting edge portion and the tooth tip chamfering was used. It was confirmed that the number of chipping at the time of 32 cuts can be greatly reduced compared to the case of using the comparative product 5 that does not have the. In particular, in both cases of the second and third cutting tests, it was confirmed that the number of chippings at the time of 32 cuts approached zero when using the working products 1 to 4. On the other hand, when the comparative product 1 having the projecting edge portion and the chamfered teeth is used, the chipping number is clearly reduced as compared with the case of using the comparative product 5, but the effect is It was not enough, and it was confirmed that the ratio of the set teeth in the sawtooth group affected the chipping.
　つまり、第１から第３の切削試験の結果から、右アサリ歯及び左アサリ歯が突縁部をそれぞれ有してあっても、右アサリ歯の歯先及び左アサリ歯の歯先に歯先面取を歯先縁に沿ってそれぞれ形成し、鋸歯グループにおけるアサリ歯の割合を適切な範囲内において設定することにより、硬質チップ帯鋸刃の切れ曲がり及びチッピングを十分に抑制できることが判明した。 In other words, from the results of the first to third cutting tests, even if the right and left set teeth have protrusions, the tips of the right set teeth and the left set teeth add to the tip of the teeth. It has been found that cutting and chipping of the hard tip band saw blade can be sufficiently suppressed by forming chamfers along the tip edges and setting the ratio of the set teeth in the saw tooth group within an appropriate range.

Claims (7)

  1. 　先行歯としての直歯と、後続歯としての右アサリ歯及び左アサリ歯を含む鋸歯組み合わせパターンからなる鋸歯グループを繰り返して備え、前記直歯、前記右アサリ歯、及び前記左アサリ歯は、歯先側に、硬質材料からなる硬質チップをそれぞれ有した硬質チップ帯鋸刃であって、
    　前記右アサリ歯の左側コーナ部及び前記左アサリ歯の右側コーナ部は、前記直歯の歯先縁に対して切込み方向へ突出した突縁部にそれぞれなっており、
    　前記右アサリ歯の歯先及び前記左アサリ歯の歯先に、歯先面取が歯先縁に沿ってそれぞれ形成され、
    　前記鋸歯グループにおける鋸歯の総枚数に対する前記右アサリ歯及び前記左アサリ歯の枚数の割合は、７１～８３％に設定されている、
    硬質チップ帯鋸刃。     A straight tooth as a leading tooth and a saw tooth group consisting of a saw tooth combination pattern including a right set tooth and a left set tooth as a subsequent tooth are repeatedly provided, and the straight tooth, the right set tooth, and the left set tooth are teeth. Hard tip band saw blades each having a hard tip made of a hard material on the front side,
    The left corner portion of the right set teeth and the right corner portion of the left set teeth are respectively projecting edge portions protruding in the cutting direction with respect to the tooth tip edges of the straight teeth,
    On the tooth tip of the right set tooth and the tooth tip of the left set tooth, a tooth tip chamfer is formed along the tooth tip edge, respectively.
    The ratio of the number of the right set teeth and the left set teeth to the total number of saw teeth in the saw tooth group is set to 71 to 83%.
    Hard tip band saw blade.
  2. 　前記直歯の歯先に、歯先面取が歯先縁に沿って形成されている、請求項１に記載の硬質チップ帯鋸刃。 The hard tip band saw blade according to claim 1, wherein a tooth chamfer is formed on the tooth tip of the straight tooth along the tooth tip edge.
  3. 　前記鋸歯グループにおける鋸歯の総枚数は、５枚以上である、請求項１又は２に記載の硬質チップ帯鋸刃。 The hard chip band saw blade according to claim 1 or 2, wherein the total number of saw teeth in the saw tooth group is 5 or more.
  4. 　前記右アサリ歯のアサリ振り出し位置は、前記右アサリ歯における歯底と前記硬質チップの間に位置し、前記左アサリ歯のアサリ振り出し位置は、前記左アサリ歯における歯底と前記硬質チップの間に位置している、請求項１～３のいずれかに記載の硬質チップ帯鋸刃。 The set-up position of the right set teeth is located between the bottom of the right set teeth and the hard tip, and the set-up position of the left set teeth is between the set bottom of the left set teeth and the hard tip. The hard-tip band saw blade according to any one of claims 1 to 3, wherein
  5. 　前記歯先面取の帯幅方向に対する面取角は、３５～５５度に設定されている、請求項１～４のいずれかに記載の硬質チップ帯鋸刃。 The hard tip band saw blade according to any one of claims 1 to 4, wherein a chamfer angle of the tooth chamfer with respect to a band width direction is set to 35 to 55 degrees.
  6. 　前記歯先面取の帯幅方向の面取長さは、０．０３～０．１０ｍｍに設定されている、請求項１～５のいずれかに記載の硬質チップ帯鋸刃。 The hard tip band saw blade according to any one of claims 1 to 5, wherein a chamfer length in a band width direction of the tooth chamfer is set to 0.03 to 0.10 mm.
  7. 　前記突縁部の突出量は、０．０２～０．１０ｍｍに設定されている、請求項１～６のいずれかに記載の硬質チップ帯鋸刃。 The hard tip band saw blade according to any one of claims 1 to 6, wherein a protruding amount of the protruding edge portion is set to 0.02 to 0.10 mm.
PCT/JP2018/005634 2017-02-21 2018-02-19 Hard-tip band saw blade having offset teeth in which tooth tip chamfer is formed along tooth tip edge WO2018155356A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022176824A1 (en) * 2021-02-19 2022-08-25 株式会社アマダ Band saw blade

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227864A (en) * 1938-06-10 1941-01-07 Lerned F Ronan Metal cutting saw
JP2000263327A (en) * 1999-01-11 2000-09-26 Amada Co Ltd Band saw blade
JP2010284793A (en) * 2009-05-12 2010-12-24 Amada Co Ltd Band saw blade
JP2016043463A (en) * 2014-08-26 2016-04-04 株式会社アマダホールディングス Saw blade

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227864A (en) * 1938-06-10 1941-01-07 Lerned F Ronan Metal cutting saw
JP2000263327A (en) * 1999-01-11 2000-09-26 Amada Co Ltd Band saw blade
JP2010284793A (en) * 2009-05-12 2010-12-24 Amada Co Ltd Band saw blade
JP2016043463A (en) * 2014-08-26 2016-04-04 株式会社アマダホールディングス Saw blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022176824A1 (en) * 2021-02-19 2022-08-25 株式会社アマダ Band saw blade

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JP2018134700A (en) 2018-08-30

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