JP2005066780A - Throwaway type gear cutter - Google Patents

Throwaway type gear cutter Download PDF

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JP2005066780A
JP2005066780A JP2003301524A JP2003301524A JP2005066780A JP 2005066780 A JP2005066780 A JP 2005066780A JP 2003301524 A JP2003301524 A JP 2003301524A JP 2003301524 A JP2003301524 A JP 2003301524A JP 2005066780 A JP2005066780 A JP 2005066780A
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tool body
tip
gear
cutter
chip
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Yuji Shinjo
裕二 新城
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Tungaloy Corp
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Tungaloy Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
    • B23F21/12—Milling tools
    • B23F21/14—Profile cutters of disc type
    • B23F21/143—Profile cutters of disc type with inserted cutting elements
    • B23F21/146—Profile cutters of disc type with inserted cutting elements in exchangeable arrangement

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  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the accuracy and tip life of a gear in tooth space machining by a throwaway type gear cutter. <P>SOLUTION: The bottom faces of tip seats alternately disposed on both side faces of the outer peripheral edge part of an annular tool body 1 are detachably mounted with tips 4 of polygonal plate shape abutting on the lower faces in the thickness direction, by attaching screws 7 from the side face side of the tool body 1. The intersecting ridgelines of a side face 4c, facing forward in the rotating direction K of the tool body, of the tip, and an upper face 4a facing the side part of the tool body, are formed as cutting edge ridges 5a, 5b for cutting the bottom and tooth face part of an involute gear. A cutter angle defined by the side face and the upper face is set to 65-80°, and a perpendicular rake angle defined by the cutting edge ridge and the side face is set into a range of 5-20°. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、スローアウェイ式歯切りカッタ（以下、歯切りカッタという。）に関する。 The present invention relates to a throw-away type gear cutting cutter (hereinafter referred to as a gear cutting cutter).

例えば建設機械等の大型産業機械に使用される大モジュールの歯車の加工に使用される従来の歯切りカッタとこの歯切りカッタに使用されるスローアウェイチップ（以下、チップという。）をそれぞれ図１２、図１３に例示する。図１２に示すようにチップ（４）は右刃および左刃が構成されるように組込まれるもので図１３に示すようにインボリュートカーブからなる切れ刃稜（５ａ、５ｂ）を有している。このチップ（４）は逃げ面（４ａ）側に位置する中央取り付け穴を利用して、取付ねじ（７）により工具本体（１）のチップ座（２）内に固定される。このような構成により、この歯切りカッタは、植刃形、ソリッド形からなるカッタよりも生産能率のよい成形歯切りが行えるというものである。この歯切りカッタは、軸線（Ｏ）を中心として回転し送りを与えられることにより図１１に示すように例えば内歯車の歯溝（１１ａ、１１ｂ、・・・）を１箇所ずつ加工していくものである。（例えば、特許文献１参照） For example, a conventional gear cutter used for machining a large module gear used in a large industrial machine such as a construction machine and a throw-away chip (hereinafter referred to as a chip) used in the gear cutter are shown in FIG. This is illustrated in FIG. As shown in FIG. 12, the tip (4) is assembled so as to constitute a right blade and a left blade, and has cutting edge ridges (5a, 5b) made of an involute curve as shown in FIG. This tip (4) is fixed in the tip seat (2) of the tool body (1) by means of a mounting screw (7) using a central mounting hole located on the flank (4a) side. With such a configuration, this gear cutting cutter can perform molding gear cutting with a higher production efficiency than a cutter made of a cutting edge shape or a solid shape. The gear cutting cutter rotates around the axis (O) and is fed to process the tooth grooves (11a, 11b,...) Of the internal gear one by one as shown in FIG. Is. (For example, see Patent Document 1)

実開昭５８−９８１２６号公報Japanese Utility Model Publication No. 58-98126

上述した歯切りカッタに装着されるチップ（４）は、厚さ方向の上下面のうち下面を該歯切りカッタの回転方向（Ｋ）前方に向けられたすくい面（４ｃ）と側面側に向けられた逃げ面（４ａ）とのなす刃物角が９０°の角度をなすいわゆるネガチップであり、該工具本体（１）へ組付けたときには上記切れ刃稜（５ａ、５ｂ）の実効のすくい角である垂直すくい角（γｏ）は負となってしまうため次のような問題が生じやすくなる。
（１）切削抵抗が高くなるため歯切りカッタの工作機械への取付剛性や被削材のクランプ剛性が低い場合、歯切りカッタや被削材にびびり振動が発生し、加工する歯車の精度やチップ（４）の寿命に悪影響を及ぼす。
（２）切りくずは切削面である歯面側へ排出されるため、切削した歯面に擦過し歯面を傷付けたり、歯面精度を劣化させたりする。
（３）図１１の該歯切りカッタによる歯車の加工状態に示すように、加工済みの歯溝（１１ｂ）の隣に歯溝を加工するとき、上記加工済みの歯溝（１１ｂ）に近い歯面（１３ｃ）では剛性が低下するため、加工中のびびり振動、歯車の精度劣化、チップ（４）の寿命の低下を生じるおそれがある。 The tip (4) to be mounted on the above-described gear cutting cutter has the lower surface of the upper and lower surfaces in the thickness direction facing the rake face (4c) and the side surface facing forward in the rotational direction (K) of the gear cutting cutter. A so-called negative tip having a blade angle of 90 ° with the flank face (4a) formed, and when it is assembled to the tool body (1), the effective rake angle of the cutting edge ridges (5a, 5b) is Since a certain vertical rake angle (γo) becomes negative, the following problems are likely to occur.
(1) When the cutting resistance increases and the mounting rigidity of the gear cutter to the machine tool and the clamp rigidity of the work material are low, chatter vibration occurs in the gear cutter and the work material, and the accuracy of the gear to be processed This adversely affects the life of the chip (4).
(2) Since the chips are discharged to the tooth surface, which is the cutting surface, the chips are rubbed against the cut tooth surface and the tooth surface is damaged or the tooth surface accuracy is deteriorated.
(3) As shown in the processing state of the gear by the gear cutter shown in FIG. 11, when a tooth gap is machined next to the machined tooth groove (11b), the tooth close to the machined tooth groove (11b). Since the rigidity of the surface (13c) is reduced, there is a possibility that chatter vibration during processing, accuracy deterioration of the gear, and the life of the chip (4) may be reduced.

本発明は、上述した問題に鑑みなされたものであり、その目的は、加工時の切削抵抗を低減し歯切りカッタや被削材のびびり振動を抑制することにより加工された歯車の精度とチップの寿命を高めた歯切りカッタを提供することにある。 The present invention has been made in view of the above-described problems, and its purpose is to reduce the cutting resistance during machining and to suppress the chatter vibration of the gear cutter and work material and the accuracy of the gear machined. It is an object of the present invention to provide a gear cutter with a long life.

上記課題を解決するために、本発明は、環状をなす工具本体の外周縁部分に沿ってチップ座が両側面に交互に配設され、上記チップ座の該工具本体の回転方向（Ｋ）前方側に切りくずポケットが連設され、上記チップ座の該工具本体の側方を向く底面に多角形板状のスローアウェイチップがその厚さ方向に対向する上下面のうち下面を当接させ、上記スローアウェイチップが該工具本体の側面側から取付ねじにより着脱可能に装着されるとともに、上記スローアウェイチップの該工具本体の回転方向（Ｋ）前方を向く側面と該工具本体の側方を向く上面との交差稜線がインボリュート歯車の歯底および歯面部分を切削する切れ刃稜とされたスローアウェイ式歯切りカッタにおいて、上記スローアウェイチップの上記側面と上記上面とのなす刃物角（α）が６５°〜８０°の範囲に設定され、且つ上記側面および上記切れ刃稜のなす垂直すくい角（γｏ）が５°〜２０°の範囲に設定されたことを特徴とするスローアウェイ式歯切りカッタである。 In order to solve the above-mentioned problems, the present invention provides a chip seat alternately disposed on both side surfaces along an outer peripheral edge portion of an annular tool body, and the tool seat has a front in the rotational direction (K). A chip pocket is continuously provided on the side, and the bottom surface of the tip seat facing the side of the tool body is contacted with the lower surface of the upper and lower surfaces facing the thickness direction of the polygonal plate-shaped throw-away tip, The throwaway tip is detachably mounted from the side surface side of the tool body with a mounting screw, and the side surface of the throwaway tip facing forward in the rotation direction (K) of the tool body and the side of the tool body are faced. In a throw-away type gear cutting cutter in which an intersecting ridge line with an upper surface is a cutting edge ridge that cuts a tooth bottom and a tooth surface portion of an involute gear, a blade formed by the side surface and the upper surface of the throw-away tip Slow characterized in that the angle (α) is set in the range of 65 ° to 80 °, and the vertical rake angle (γo) formed by the side surface and the cutting edge ridge is set in the range of 5 ° to 20 °. It is an away type gear cutting cutter.

上述した本発明に係る歯切りカッタによれば、実効のすくい角である垂直すくい角（γｏ）が正となり、従来のネガチップにくらべ切削抵抗が低減するため、該歯切りカッタや被削材のびびり振動が抑制され、歯車の精度とチップの寿命が向上する。 According to the above-described gear cutting cutter according to the present invention, the effective rake angle, that is, the vertical rake angle (γo) is positive, and the cutting resistance is reduced compared to the conventional negative insert. Chatter vibration is suppressed, and the accuracy of the gear and the life of the chip are improved.

また、切りくずのは歯面側から離間する方向に向かって排出されるため、切りくずの歯面への擦過による傷、歯面精度の劣化が抑制される。 Further, since chips are discharged in a direction away from the tooth surface side, scratches due to scraping of the chips on the tooth surface and deterioration of tooth surface accuracy are suppressed.

次に、本発明を適用した実施例について図１〜図１０を参照しながら説明する。図１は、この実施例に係る歯切りカッタの要部正面図である。図２は図１に示す歯切りカッタの要部上面図である。図３は図１に示す歯切りカッタの要部断面図である。図４および図５は図３におけるＡ矢視図である。図６、図７はそれぞれ図１に示す歯切りカッタに使用されるチップの正面図、側面図であり、図８〜図１０は図１に示す歯切りカッタに使用されるチップの底面図である。 Next, an embodiment to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a front view of an essential part of a gear cutter according to this embodiment. FIG. 2 is a top view of an essential part of the gear cutter shown in FIG. FIG. 3 is a cross-sectional view of the main part of the gear cutter shown in FIG. 4 and 5 are views taken in the direction of arrow A in FIG. 6 and 7 are a front view and a side view, respectively, of the chip used in the gear cutter shown in FIG. 1, and FIGS. 8 to 10 are bottom views of the chip used in the gear cutter shown in FIG. is there.

図１〜図３に示すように、この実施例に係る歯切りカッタは、環状の工具本体（１）の外周縁部に沿ってチップ座（２）が両側面に交互に凹設される。各チップ座（２）の該工具本体（１）の回転方向（Ｋ）前方側には切りくずポケット（３ａ、３ｂ）が上記チップ座（２）に連なるように凹設される。そして、チップ取付ねじ（７）と螺合する雌ねじが各チップ座（２）の該工具本体（１）の軸線（Ｏ）方向外側に向く底面（２ａ）から内部へ延びている。 As shown in FIGS. 1 to 3, in the gear cutter according to this embodiment, the tip seats (2) are alternately recessed on both side surfaces along the outer peripheral edge of the annular tool body (1). Chip pockets (3a, 3b) are recessed in the tip seat (2) in front of the tool body (1) in the rotational direction (K) so as to be continuous with the tip seat (2). And the internal thread screwed together with a chip | tip attachment screw (7) is extended inward from the bottom face (2a) which faces the axial direction (O) direction of this tool main body (1) of each chip | tip seat (2).

チップ（４）は、図６〜図８に示すように長方形板状をなし、大型長方形面をなす上面（４ａ）と、これに対向する下面（４ｂ）と、上下面に挟まれた４つの側面（４ｃ〜４ｅ）とを備えている。上記側面（４ｃ〜４e）のうち上記大型長方形の長辺に交差する一対の第１側面（４ｃ）は、上面（４ａ）から下面（４ｂ）に向かうにしたがってチップ（４）の内側へ漸次傾斜し、上面（４ａ）とのなす角度（α）が６５°〜８０°の範囲に設定される。 The chip (4) has a rectangular plate shape as shown in FIGS. 6 to 8, and includes an upper surface (4a) forming a large rectangular surface, a lower surface (4b) opposite to the upper surface (4a), and four sandwiched between the upper and lower surfaces. Side surfaces (4c to 4e). Of the side surfaces (4c to 4e), the pair of first side surfaces (4c) intersecting the long side of the large rectangle gradually inclines toward the inside of the chip (4) from the upper surface (4a) toward the lower surface (4b). The angle (α) formed with the upper surface (4a) is set in the range of 65 ° to 80 °.

上記チップ（４）は、その下面（４ｂ）をチップ座（２）の底面（２ａ）に当接し、上記第１側面（４ｃ）のうち該工具本体（１）の回転方向（Ｋ）後方側を向く一方の側面を、これに対向するチップ座（２）の側壁（２ｂ）に当接し、さらに該工具本体（１）の径方向中心側を向く側面（４ｄ）を、これに対向するチップ座（２）の側壁（２ｃ）に当接するようにチップ座（２）に載置される。そして、上記チップ（４）は、その上下面（４ａ、４ｂ）を貫通する取付穴に係合するチップ取付ねじ（７）をチップ座（２）の底面（２ａ）に設けられた雌ねじにねじ込むことにより係止される。そうして、上記チップ（２）の上記回転方向（Ｋ）前方側を向く上記第１側面（４ｃ）からなるすくい面と、上記第１側面（４ｃ）と上面（４ａ）との交差する稜線からなる切れ刃稜（５ａ、５ｂ）と、該工具本体（１）の側方外側に向く上面（４ａ）からなる逃げ面とから切れ刃部が構成される。上記切れ刃稜（５ａ、５ｂ）は、該工具本体（１）の軸線（Ｏ）回りの回転軌跡が加工すべきインボリュート歯形に成形されている。なお、上記チップ（４）は、同一形状をなす第１側面（４ｃ）を対向に一対設けたため、該工具本体（１）の両側面のチップ座（２）に装着可能であり、各側面のチップ座で使用することにより２回使用可能である。 The tip (4) has its lower surface (4b) in contact with the bottom surface (2a) of the tip seat (2), and the tool body (1) in the rotational direction (K) rear side of the first side surface (4c). The side surface (4d) facing the central side in the radial direction of the tool body (1) is further abutted against the side surface (4b) of the tip seat (2) facing the side surface. It is mounted on the chip seat (2) so as to contact the side wall (2c) of the seat (2). And the said chip | tip (4) screws the chip | tip mounting screw (7) engaged with the mounting hole which penetrates the upper and lower surfaces (4a, 4b) into the female screw provided in the bottom face (2a) of the chip seat (2). It is locked by. Thus, a ridge line intersecting the rake face composed of the first side face (4c) facing the front side in the rotational direction (K) of the chip (2) and the first side face (4c) and the upper face (4a). A cutting edge portion is constituted by a cutting edge ridge (5a, 5b) made of and a flank face made of an upper surface (4a) facing the outside of the tool body (1). The cutting edge ridges (5a, 5b) are formed into an involute tooth profile to be machined by the rotation locus around the axis (O) of the tool body (1). The tip (4) is provided with a pair of first side surfaces (4c) having the same shape so as to face each other, so that the tip (4) can be mounted on the tip seats (2) on both side surfaces of the tool body (1). It can be used twice by using it at the tip seat.

上述したようにチップ（４）は、すくい面（４ｃ）をなす上記第１側面（４ｃ）と、逃げ面をなす上面（４ａ）とのなす角度（α）が６５°〜８０°に設定されるので、上記チップ（２）を該工具本体（１）のチップ座（２）に装着したときには、上記第１側面（４ｃ）と上記上面（４ａ）からなる切れ刃部は、図４に示すように実効のすくい角である垂直すくい角（γｏ）が５°〜２０°の正の値をとる。 As described above, in the chip (4), the angle (α) between the first side surface (4c) forming the rake face (4c) and the upper surface (4a) forming the flank face is set to 65 ° to 80 °. Therefore, when the tip (2) is mounted on the tip seat (2) of the tool body (1), the cutting edge portion composed of the first side surface (4c) and the upper surface (4a) is shown in FIG. Thus, the vertical rake angle (γo), which is an effective rake angle, takes a positive value of 5 ° to 20 °.

このような構成を有した歯切りカッタは、垂直すくい角（γｏ）が負の従来歯切りカッタにくらべ加工時の切削抵抗が低減され、該歯切りカッタや被削材のびびり振動が抑制されるので、歯車の精度とチップ（４）の寿命が向上する。 The gear cutter with such a configuration has reduced cutting resistance when machining compared to a conventional gear cutter with a negative vertical rake angle (γo), and chatter vibration of the gear cutter and work material is suppressed. Therefore, the accuracy of the gear and the life of the tip (4) are improved.

また、上記垂直すくい角（γｏ）が正になることにより、切りくずの流出方向は、加工する歯車の歯面から離間する方向へ向かうようになり、上記歯面への切りくず擦過による歯面の傷付け、歯面精度の劣化を抑制する。 In addition, since the vertical rake angle (γo) becomes positive, the outflow direction of the chip is directed away from the tooth surface of the gear to be processed, and the tooth surface due to chip abrasion on the tooth surface. Suppresses damage and deterioration of tooth surface accuracy.

垂直すくい角（γｏ）が正となる一方で、切れ刃部のすくい面（４ｃ）と逃げ面（４ａ）とのなす垂直刃物角が減少し、切れ刃部の強度不足によるチッピングや欠損が生じるおそれがある。そのため切れ刃稜（５ａ、５ｂ）に沿ってホーニング（８）が施されるのが好ましい。図９に示すように、上記ホーニング（８）は、上記第１側面（４ｃ）に対向する方向からみた幅（Ｗ）が０．１０ｍｍ〜０．４０ｍｍ、好ましくは０．１５ｍｍ〜０．３５ｍｍ、特に好ましくは０．２０ｍｍ〜０．３０ｍｍであり、上記切れ刃稜（５ａ、５ｂ）の直角断面における上記第１側面（４ｃ）とのなす角度（β）が１０°〜４０°、好ましくは１５°〜３５°、特に好ましくは２０°〜３０°のチャンファホーニングとされる。そうすれば切れ刃部の強度不足によるチッピングや欠損を抑制できる。なお、上記幅（Ｗ）を０．１０ｍｍ未満にすると切れ刃部の強度不足を改善できないおそれがあり、０．４０ｍｍより大きくすると切削抵抗の低減効果がなくなるおそれがある。一方、上記角度（β）を１０°未満にすると切れ刃部の強度不足を改善できないおそれがあり、４０°より大きくすると切削抵抗の強度不足を改善できないおそれがある。 While the vertical rake angle (γo) becomes positive, the vertical blade angle formed by the rake face (4c) and the flank face (4a) of the cutting edge is reduced, and chipping and chipping occur due to insufficient strength of the cutting edge. There is a fear. Therefore, honing (8) is preferably performed along the cutting edge ridges (5a, 5b). As shown in FIG. 9, the honing (8) has a width (W) as viewed from the direction facing the first side surface (4c) of 0.10 mm to 0.40 mm, preferably 0.15 mm to 0.35 mm, Particularly preferably, it is 0.20 mm to 0.30 mm, and an angle (β) made with the first side surface (4c) in a right-angled section of the cutting edge (5a, 5b) is 10 ° to 40 °, preferably 15 The chamfer honing of ° to 35 °, particularly preferably 20 ° to 30 °. By doing so, chipping and chipping due to insufficient strength of the cutting edge portion can be suppressed. If the width (W) is less than 0.10 mm, insufficient strength of the cutting edge may not be improved, and if it is greater than 0.40 mm, the cutting resistance reduction effect may be lost. On the other hand, if the angle (β) is less than 10 °, insufficient strength of the cutting edge may not be improved, and if it is greater than 40 °, insufficient strength of the cutting resistance may not be improved.

上述したチャンファホーニング以外にも、円弧状ホーニング、又は上述したチャンファホーニング両端部に円弧状ホーニングが施された複合ホーニングであってもよい。図１０に示すように、上記円弧状ホーニングおよび上記複合ホーニングにおける円弧部の曲率半径（Ｒｈ）は０．０１５ｍｍ〜０．１０ｍｍが好ましい。そうすれば第１側面（４ｃ）又はホーニング（８）と上面（４ａ）との交差稜線部の強度が向上しチッピングや欠損が抑制される。しかし、上記円弧部の曲率半径（Ｒｈ）を０．１０ｍｍより大きくするとホーニングの加工コスト高騰につながるおそれがある。 In addition to the chamfer honing described above, arc honing may be used, or composite honing in which arc honing is performed on both ends of the chamfer honing described above. As shown in FIG. 10, the curvature radius (Rh) of the arc portion in the arc-shaped honing and the composite honing is preferably 0.015 mm to 0.10 mm. If it does so, the intensity | strength of the crossing ridgeline part of a 1st side surface (4c) or honing (8), and an upper surface (4a) will improve, and a chipping and a defect | deletion will be suppressed. However, if the radius of curvature (Rh) of the arc portion is larger than 0.10 mm, the honing processing cost may increase.

上述したように垂直すくい角（γｏ）が正になることにより、切りくずの流出方向は、加工する歯車の歯面から離間する方向へ向かう反面、切りくずポケット（３ａ）側へ向かい、切りくずは上記切りくずポケット（３ａ）に擦過したり排出を阻害されたりするおそれがある。そこで、切りくずポケット（３ａ）は、図５に示すように、横断面が曲線状をなしチップ座（２）の底面（２ａ）との交差部における接線とチップ（４）の第１側面（４ｃ）の延長線とのなす角度（Ｂ）が該工具本体（１）の回転方向（Ｋ）後方側に向かって０°〜１０°とされるのが好ましい。そうすれば、チップ（４）の上記第１側面（４ｃ）上を流出する切りくずは、上記切りくずポケット（３ａ）への擦過が抑えられることになり円滑に排出されるとともに切削抵抗も増加しない。しかし、上記角度（Ｂ）が１０°より大きくなると、チップ座（２）の底面（２ａ）の強度が損なわれるおそれがある。 As described above, when the vertical rake angle (γo) is positive, the direction of chip discharge is toward the direction away from the tooth surface of the gear to be processed, whereas it is toward the chip pocket (3a). There is a risk of rubbing the chip pocket (3a) or hindering discharge. Therefore, as shown in FIG. 5, the chip pocket (3a) has a curved cross section and a tangent at the intersection with the bottom surface (2a) of the chip seat (2) and the first side surface of the chip (4) ( It is preferable that the angle (B) formed with the extended line 4c) be 0 ° to 10 ° toward the rear side in the rotational direction (K) of the tool body (1). Then, the chips flowing out on the first side surface (4c) of the chip (4) are suppressed from being scraped to the chip pocket (3a), and are smoothly discharged and the cutting resistance is not increased. . However, if the angle (B) is greater than 10 °, the strength of the bottom surface (2a) of the chip seat (2) may be impaired.

なお、この実施例１では歯車の歯溝を切削する切れ刃部は、該工具本体（１）の左右の各側面に設けられた一つのチップの切れ刃部から構成されているが、二以上のチップの切れ刃部をオーバーラップさせて構成されてもよい。 In the first embodiment, the cutting edge portion that cuts the tooth gap of the gear is composed of one cutting edge portion provided on each of the left and right side surfaces of the tool body (1). The cutting edge portion of the tip may be overlapped.

は本発明を適用した実施例に係る歯切りカッタの要部正面図である。These are the principal part front views of the gear cutter based on the Example to which this invention is applied. は図１に示す歯切りカッタの要部上面図である。FIG. 2 is a top view of the main part of the gear cutter shown in FIG. 1. は図１に示す歯切りカッタの要部縦断面図である。FIG. 2 is a longitudinal sectional view of a main part of the gear cutter shown in FIG. 1. は図３におけるＡ矢視図である。FIG. 4 is a view as seen from an arrow A in FIG. 3. は図３におけるＡ矢視図である。FIG. 4 is a view as seen from an arrow A in FIG. 3. は図１に示す歯切りカッタに使用されるチップの正面図である。FIG. 2 is a front view of a chip used in the gear cutter shown in FIG. 1. は図１に示す歯切りカッタに使用されるチップの側面図である。FIG. 2 is a side view of a tip used in the gear cutter shown in FIG. 1. は図１に示す歯切りカッタに使用されるチップの下面図である。FIG. 2 is a bottom view of a chip used in the gear cutter shown in FIG. 1. は図１に示す歯切りカッタに使用されるチップの切れ刃稜直角断面図である。FIG. 2 is a cross-sectional view perpendicular to the cutting edge of a chip used in the gear cutter shown in FIG. 1. は図１に示す歯切りカッタに使用されるチップの切れ刃稜直角断面図である。FIG. 2 is a cross-sectional view perpendicular to the cutting edge of a chip used in the gear cutter shown in FIG. 1. は歯切りカッタによる歯車の切削状態を示す図である。FIG. 4 is a diagram showing a cutting state of a gear by a gear cutter. は従来の歯切りカッタを示す図であり、（ａ）は要部縦断面図、（ｂ）は要部正面図である。FIG. 4 is a view showing a conventional gear cutting cutter, where (a) is a longitudinal sectional view of a main part and (b) is a front view of the main part. は図１２に示す歯切りカッタに使用されるチップを示す図であり、（ａ）は側面図、（ｂ）は正面図である。These are figures which show the chip | tip used for the gear cutter shown in FIG. 12, (a) is a side view, (b) is a front view.

符号の説明Explanation of symbols

１ 工具本体
２ チップ座
２ａ チップ座の底面
３ａ、３ｂ 切りくずポケット
４ チップ
４ａ 上面（逃げ面）
４ｂ 下面
４ｃ 第１側面（すくい面）
５ａ、５ｂ 切れ刃稜
６ａ、６ｂ 取付穴
７ チップ取付ねじ
１０ 被削材
１１ａ、１１ｂ 歯溝
１２ａ、１２ｂ 歯底
１３ａ、１３ｂ、１４ａ、１４ｂ 歯面 DESCRIPTION OF SYMBOLS 1 Tool body 2 Tip seat 2a Bottom surface 3a, 3b Chip seat Chip pocket 4 Tip 4a Upper surface (flank)
4b Lower surface 4c First side surface (rake face)
5a, 5b Cutting edge 6a, 6b Mounting hole 7 Tip mounting screw 10 Work material 11a, 11b Tooth groove 12a, 12b Tooth base 13a, 13b, 14a, 14b Tooth surface

Claims (1)

環状をなす工具本体の外周縁部分に沿ってチップ座が両側面に交互に配設され、上記チップ座の該工具本体の回転方向（Ｋ）前方側に切りくずポケットが連設され、上記チップ座の該工具本体の側方を向く底面に多角形板状のスローアウェイチップがその厚さ方向に対向する上下面のうち下面を当接させ、上記スローアウェイチップが該工具本体の側面側から取付ねじにより着脱可能に装着されるとともに、上記スローアウェイチップの該工具本体の回転方向（Ｋ）前方を向く側面と該工具本体の側方を向く上面との交差稜線がインボリュート歯車の歯底および歯面部分を切削する切れ刃稜とされたスローアウェイ式歯切りカッタにおいて、上記スローアウェイチップの上記側面と上記上面とのなす刃物角（α）が６５°〜８０°の範囲に設定され、上記側面および上記切れ刃稜のなす垂直すくい角（γｏ）が５°〜２０°の範囲に設定されたことを特徴とするスローアウェイ式歯切りカッタ。 Chip seats are alternately arranged on both side surfaces along the outer peripheral edge portion of the annular tool body, and chip pockets are continuously provided on the front side of the tip seat in the rotation direction (K) of the tool body. The bottom surface of the seat facing the side of the tool body is in contact with the lower surface of the upper and lower surfaces facing the thickness direction of the polygonal plate-shaped throwaway tip, and the throwaway tip is moved from the side surface side of the tool body. A cross-ridge line between a side surface of the throwaway tip facing forward in the rotation direction (K) of the tool body and an upper surface facing the side of the tool body is attached to the bottom of the involute gear. In the throw-away type gear cutting cutter which is a cutting edge ridge for cutting the tooth surface portion, the blade angle (α) formed by the side surface and the upper surface of the throw-away tip is set in a range of 65 ° to 80 °. Is, indexable toothed cutter, characterized in that the side surface and the cutting edge ridge of eggplant vertical rake angle (.gamma. O) is set in a range of 5 ° to 20 °.
JP2003301524A 2003-08-26 2003-08-26 Throwaway type gear cutter Pending JP2005066780A (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
JP2009056535A (en) * 2007-08-31 2009-03-19 Tungaloy Corp Rotary cutting tool
WO2010073681A1 (en) 2008-12-25 2010-07-01 株式会社タンガロイ Insert for cutting and interchangeable knife edge-type gear cutting tool using same
WO2011136275A1 (en) * 2010-04-27 2011-11-03 株式会社タンガロイ Blade edge replacement type rotary tool
WO2013018724A1 (en) 2011-07-29 2013-02-07 株式会社タンガロイ Cutting insert and rotating cutting tool
CN103658799A (en) * 2012-09-07 2014-03-26 山特维克知识产权股份有限公司 Milling tool
WO2014104245A1 (en) 2012-12-27 2014-07-03 株式会社タンガロイ Cutting insert and rotary cutting tool with replaceable blade edge
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Publication number Priority date Publication date Assignee Title
JP2009056535A (en) * 2007-08-31 2009-03-19 Tungaloy Corp Rotary cutting tool
WO2010073681A1 (en) 2008-12-25 2010-07-01 株式会社タンガロイ Insert for cutting and interchangeable knife edge-type gear cutting tool using same
JP4756408B2 (en) * 2008-12-25 2011-08-24 株式会社タンガロイ Cutting insert and cutting edge replaceable cutting tool using the same
KR101173843B1 (en) 2008-12-25 2012-08-13 가부시키가이샤 탕가로이 Cutting insert and indexable tooth cutting tool using the same
US8308399B2 (en) 2008-12-25 2012-11-13 Tungaloy Corporation Cutting insert and indexable tooth cutting tool using the same
WO2011136275A1 (en) * 2010-04-27 2011-11-03 株式会社タンガロイ Blade edge replacement type rotary tool
WO2013018724A1 (en) 2011-07-29 2013-02-07 株式会社タンガロイ Cutting insert and rotating cutting tool
US9289835B2 (en) 2011-07-29 2016-03-22 Tungaloy Corporation Cutting insert and rotary cutting tool
CN103658799A (en) * 2012-09-07 2014-03-26 山特维克知识产权股份有限公司 Milling tool
US9579736B2 (en) 2012-09-07 2017-02-28 Sandvik Intellectual Property Ab Milling tool
WO2014104245A1 (en) 2012-12-27 2014-07-03 株式会社タンガロイ Cutting insert and rotary cutting tool with replaceable blade edge
CN104903039A (en) * 2012-12-27 2015-09-09 株式会社钨钛合金 Cutting insert and rotary cutting tool with replaceable blade edge
US9796032B2 (en) 2012-12-27 2017-10-24 Tungaloy Corporation Cutting insert and indexable rotary cutting tool
JP2019048379A (en) * 2012-12-27 2019-03-28 株式会社タンガロイ Cutting insert and edge replacement-type rotary cutting tool
JP2014223699A (en) * 2013-05-16 2014-12-04 住友電工ハードメタル株式会社 Cutting insert and cutting tool

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