JP6223316B2 - Cutting equipment - Google Patents

Cutting equipment Download PDF

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JP6223316B2
JP6223316B2 JP2014230385A JP2014230385A JP6223316B2 JP 6223316 B2 JP6223316 B2 JP 6223316B2 JP 2014230385 A JP2014230385 A JP 2014230385A JP 2014230385 A JP2014230385 A JP 2014230385A JP 6223316 B2 JP6223316 B2 JP 6223316B2
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rake face
radial direction
cutting
rake
tip
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JP2016093860A (en
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正浩 清
正浩 清
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JATCO Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft

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Description

本発明は、ワークの加工面を、回転軸Ｘ周りの周方向に移動するスローアウェイチップの刃部で切削する切削装置に関する。   The present invention relates to a cutting apparatus that cuts a work surface of a workpiece with a blade portion of a throw-away tip that moves in a circumferential direction around a rotation axis X.

特許文献１には、切削用の刃部を有する板状のチップを回転軸回りの周方向に移動させながらワークを切削して、回転軸に対して垂直な切削面をワークに加工する回転切削工具が開示されている。   Patent Document 1 discloses a rotary cutting method in which a workpiece is cut while moving a plate-like chip having a cutting blade portion in a circumferential direction around a rotation axis, and a cutting surface perpendicular to the rotation axis is processed into the workpiece. A tool is disclosed.

特開２００１−１５０２１９号公報JP 2001-150219 A

特許文献１の回転切削工具では、平面視において多角形形状を成すチップ（スローアウェイチップ）の１辺に刃部が設けられており、チップを回転軸周りの周方向に移動させながら、刃部に設けたすくい面でワークを切削するので、幅広で帯状の切削クズが発生する。
この帯状の切削クズがロール状に丸まると、剛性が比較的に高い切削クズのロールとなるので、この切削クズのロールが、ワーク上に設けられた溝などに嵌まり込んでしまうと、切削加工後のエアブローなどで切削クズが除去されずに残ってしまうことがある。 In the rotary cutting tool of Patent Document 1, a blade portion is provided on one side of a tip (throw away tip) having a polygonal shape in plan view, and the blade portion is moved while moving the tip in the circumferential direction around the rotation axis. Since the workpiece is cut by the rake face provided on the surface, wide and strip-like cutting scraps are generated.
When this strip-shaped cutting scrap is rolled up, it becomes a roll of cutting scrap having a relatively high rigidity. Therefore, if this cutting scrap roll fits into a groove or the like provided on the workpiece, Cutting scraps may remain without being removed by air blow after processing.

よって、切削により生じた切削クズが、切削加工後のワークに残らないようにすることが求められている。   Therefore, it is required that cutting scraps generated by cutting do not remain on the workpiece after cutting.

本発明は、
刃部を有するチップを回転軸周りの周方向に移動させながら、前記刃部に設けたすくい面により、ワークの円筒状の端面の表面を切削する切削装置において、
前記回転軸方向から見て前記回転軸の径方向に延びるすくい面を、前記径方向で複数に分割して前記径方向に連なる複数のすくい面部で構成し、前記径方向で連なる複数のすくい面部のうち、前記径方向で隣接するすくい面部同士を、前記移動方向にオフセットさせ、
前記径方向で連なる複数のすくい面部を、前記径方向における外側に位置するすくい面部ほど、前記チップの移動方向における上流側に位置させると共に、
前記チップの移動方向から見て前記複数のすくい面は、前記ワークの表面を切削する切削部を前記ワークとの当接面に有しており、
前記すくい面各々の前記切削部は、前記チップの移動方向から見て、前記径方向で連なって直線状に設けられて、同一平面上に位置している構成とした。
The present invention
In the cutting apparatus for cutting the surface of the cylindrical end surface of the workpiece by the rake face provided in the blade portion while moving the tip having the blade portion in the circumferential direction around the rotation axis,
A rake face extending in the radial direction of the rotary shaft when viewed from the rotary axis direction is constituted by a plurality of rake face portions that are divided in the radial direction and continuous in the radial direction, and a plurality of rake face portions that are continuous in the radial direction. Among them, the rake face portions adjacent in the radial direction are offset in the moving direction,
Said plurality of rake face continuous with the radial direction, the more rake surface portion located outside in the radial direction, is positioned on the upstream side in the moving direction of the tip Rutotomoni,
The plurality of rake faces as viewed from the moving direction of the chip have a cutting portion for cutting the surface of the work on a contact surface with the work,
The cutting portion of each rake face is configured to be linearly connected in the radial direction when viewed from the moving direction of the chip and located on the same plane .

本発明によると、径方向で隣接するすくい面部同士が、周方向にオフセットしており、径方向で隣接するすくい面部の境界に段部が形成されている。
よって、刃部のすくい面が、径方向に直線状に形成されておらず、径方向の途中位置に段差があることにより、切削により形成される帯状の切削クズが、この段差の部分を境にして分断されるので、発生する切削クズの幅を狭くすることができる。
これにより、帯状の切削クズがロール状に丸まっても、切削クズのロールの各々の幅が小さいので、ワーク上に設けられた溝などに嵌まり難くなるので、切削クズが、エアブローなどで除去されずに切削加工後のワークに残らないようにすることができる。 According to the present invention, the rake face portions that are adjacent in the radial direction are offset in the circumferential direction, and a step portion is formed at the boundary between the rake face portions that are adjacent in the radial direction.
Therefore, the rake face of the blade portion is not formed linearly in the radial direction, and there is a step at a midway position in the radial direction. Thus, the width of the generated cutting waste can be reduced.
As a result, even if the strip-shaped cutting scrap is rolled up, the width of each of the cutting scrap rolls is small, so that it is difficult to fit into the groove provided on the workpiece. It is possible not to remain on the workpiece after cutting.

切削装置の構成を説明する図である。It is a figure explaining the structure of a cutting device. スローアウェイチップを説明する図である。It is a figure explaining a throw away tip. スローアウェイチップによるワークの切削を説明する図である。It is a figure explaining cutting of the work by a throw away tip. スローアウェイチップの変形例を説明する図である。It is a figure explaining the modification of a throw away tip.

以下、実施の形態にかかる切削装置１を説明する。
図１は、切削装置１の構成を説明する図であり、（ａ）は、切削装置１の主要部と、切削対象のワークＷを断面で示した図であり、（ｂ）は、切削装置１におけるスローアウェイチップ２の移動軌跡を説明する図であって、スローアウェイチップ２の移動軌跡と、スローアウェイチップ２で切削されるワークＷのリング状の加工面１０３ａを説明する図である。 Hereinafter, the cutting device 1 concerning embodiment is demonstrated.
FIG. 1 is a diagram for explaining a configuration of a cutting device 1, (a) is a diagram showing a cross section of a main part of the cutting device 1 and a workpiece W to be cut, and (b) is a cutting device. FIG. 2 is a diagram for explaining a movement locus of the throwaway tip 2 in FIG. 1 and explaining a movement locus of the throwaway tip 2 and a ring-shaped machining surface 103a of the workpiece W cut by the throwaway tip 2.

切削装置１での加工対象であるワークＷは、基部１０１に設けた開口１０２を囲むリング状の周壁部１０３を有しており、この周壁部１０３の上端面が、スローアウェイチップ２により切削される加工面１０３ａとなっている。   A workpiece W to be processed by the cutting apparatus 1 has a ring-shaped peripheral wall portion 103 surrounding an opening 102 provided in the base 101, and an upper end surface of the peripheral wall portion 103 is cut by the throw-away tip 2. The machined surface 103a.

切削装置１は、図示しない支持台にワークＷを固定した状態で、周壁部１０３の加工面１０３ａを、スローアウェイチップ２に設けたすくい面２２０で切削するようになっており、切削装置１では、回転中心軸（以下、回転軸Ｘ）回りに回転する基軸部１１の径方向外側に、スローアウェイチップ２の支持部１３が位置している。   The cutting device 1 is configured to cut the processing surface 103a of the peripheral wall portion 103 with a rake surface 220 provided on the throw-away tip 2 in a state where the workpiece W is fixed to a support base (not shown). The support portion 13 of the throw-away tip 2 is located on the radially outer side of the base shaft portion 11 that rotates about the rotation center axis (hereinafter referred to as the rotation axis X).

基軸部１１では、ワークＷとは反対側の端部に、当該基軸部１１の外周を全周に亘って囲むフランジ部１２が設けられており、このフランジ部１２におけるワークＷとの対向部１２ａに、支持部１３が設けられている。支持部１３は、フランジ部１２からワークＷ側の下方に延出して設けられており、この支持部１３の先端側の取付部１４では、保持プレート１５との間に挟み込まれた状態で、スローアウェイチップ２が設けられている。   In the base shaft portion 11, a flange portion 12 that surrounds the outer periphery of the base shaft portion 11 over the entire circumference is provided at the end opposite to the work W, and a portion 12 a facing the work W in the flange portion 12. Further, a support portion 13 is provided. The support portion 13 is provided so as to extend downward from the flange portion 12 on the workpiece W side, and the attachment portion 14 on the distal end side of the support portion 13 is in a state of being sandwiched between the holding plate 15 and the slow portion. An away chip 2 is provided.

この切削装置１では、図示しない駆動機構により基軸部１１が回転軸Ｘ回りに回転すると、取付部１４に設けられたスローアウェイチップ２が、回転軸Ｘ周りの周方向に移動して周壁部１０３の加工面１０３ａを全周に亘って切削するようになっている。
なお、切削装置１は、２つのスローアウェイチップ２を備えており、これらスローアウェイチップ２は、回転軸Ｘの軸方向から見て、回転軸Ｘから径方向に延びる仮想線Ｌｎ上で、回転軸Ｘを挟んで対象に配置されていると共に、仮想線Ｌｎに沿って配置されている（図１の（ｂ）参照）。 In this cutting apparatus 1, when the base shaft portion 11 rotates around the rotation axis X by a drive mechanism (not shown), the throw-away tip 2 provided on the attachment portion 14 moves in the circumferential direction around the rotation axis X and the peripheral wall portion 103. The machined surface 103a is cut over the entire circumference.
The cutting apparatus 1 includes two throwaway tips 2 that rotate on a virtual line Ln extending in the radial direction from the rotation axis X when viewed from the axial direction of the rotation axis X. It arrange | positions on the object on both sides of the axis | shaft X, and is arrange | positioned along the virtual line Ln (refer FIG.1, (b)).

図２の（ｃ）に示すように、平面視においてスローアウェイチップ２は、角部が面取りされた三角形形状の基部２０を有している。この基部２０の３つの頂点のうちの１つの頂点側は、前記した保持プレート１５と取付部１４との間に把持される把持部２１となっており、残りの２つの頂点側には、硬化処理が施された刃部２２が設けられている。   As shown in FIG. 2 (c), the throw-away tip 2 has a triangular base 20 with corners chamfered in plan view. One vertex side of the three vertices of the base portion 20 is a grip portion 21 gripped between the holding plate 15 and the mounting portion 14, and the remaining two vertex sides are hardened. A blade 22 that has been processed is provided.

切削装置１においてスローアウェイチップ２は、把持部２１を上方に向けた状態で保持されており、加工対象物であるワークＷ側の下方に刃部２２を位置させている（図１の（ａ）参照）。
回転軸Ｘ周りの周方向に移動するスローアウェイチップ２では、移動方向における下流側の面が、ワークＷの切削面（周壁部１０３の加工面１０３ａ）を切削するすくい面２２０となっており、このすくい面２２０の下側の側縁（切削部２２０ａ）で、ワークＷの加工面１０３ａを切削するようになっている。 In the cutting device 1, the throw-away tip 2 is held with the gripping portion 21 facing upward, and the blade portion 22 is positioned below the workpiece W that is the workpiece (see (a of FIG. 1). )reference).
In the throw-away tip 2 that moves in the circumferential direction around the rotation axis X, the downstream surface in the movement direction is a rake surface 220 that cuts the cutting surface of the workpiece W (the processing surface 103a of the peripheral wall portion 103). The machining surface 103a of the workpiece W is cut at the lower side edge (cutting portion 220a) of the rake face 220.

スローアウェイチップ２のすくい面２２０は、このスローアウェイチップ２の幅方向（仮想線Ｌｎの軸方向）で３つのすくい面部２２１、２２２、２２３に分割されており、幅方向で隣接するすくい面同士（すくい面部２２１とすくい面部２２２、すくい面部２２２とすくい面部２２３）は、スローアウェイチップ２の移動方向で互いにオフセットして設けられている。   The rake face 220 of the throw-away tip 2 is divided into three rake face portions 221, 222, and 223 in the width direction of the throw-away tip 2 (the axial direction of the virtual line Ln). (Rake face portion 221 and rake face portion 222, rake face portion 222 and rake face portion 223) are provided offset from each other in the moving direction of throw-away tip 2.

具体的には、最も回転軸Ｘ側（内径側）に位置するすくい面部２２１が、スローアウェイチップ２の移動方向における最も下流側に位置していると共に、最も回転軸Ｘから離れて位置するすくい面部２２３が、スローアウェイチップ２の移動方向における最も上流側に位置しており、回転軸Ｘから離れて位置するすくい面（外径側に位置するすくい面）ほど、スローアウェイチップ２の移動方向における上流側に位置している。   Specifically, the rake face portion 221 located closest to the rotation axis X side (inner diameter side) is located on the most downstream side in the moving direction of the throwaway tip 2 and is raked farthest from the rotation axis X. The surface portion 223 is located on the most upstream side in the moving direction of the throw-away tip 2, and the rake face (the rake face located on the outer diameter side) located away from the rotation axis X is the moving direction of the throw-away tip 2. It is located on the upstream side.

図２（ｂ）に示すように、側面視においてスローアウェイチップ２では、最も外径側に位置するすくい面部２２３が、前記した把持部２１の側面２１ａと面一になっており、このすくい面部２２３よりも内径側に位置するすくい面部２２１、２２２は、把持部２１の側面２１ａから、スローアウェイチップ２の移動方向における下流側に突出している。   As shown in FIG. 2 (b), in the throw-away tip 2 in a side view, the rake face portion 223 located on the outermost diameter side is flush with the side face 21a of the gripping portion 21, and this rake face portion. The rake face portions 221 and 222 located on the inner diameter side of the H.223 protrude from the side surface 21a of the grip portion 21 toward the downstream side in the moving direction of the throw-away tip 2.

さらに、図２の（ｄ）に示すように、すくい面部２２３の内径側の端部２２３ｃは、すくい面部２２２の外径側の端部２２２ｂよりも内径側に位置しており、すくい面部２２３とすくい面部２２２との境界部には、内径側に窪んだ逃げ部２３が設けられている。
すなわち、スローアウェイチップ２の移動方向における上流側に位置するすくい面部２２３の端部２２３ｃと、下流側に位置するすくい面部２２２の下面２２２ｄとが回転軸Ｘの径方向（仮想線Ｌｎの軸方向）で重なるように設けられている。
なお、すくい面部２２１とすくい面部２２２との境界部にも逃げ部２３が設けられており、すくい面部２２２の内径側の端部２２２ｃは、すくい面部２２１の外径側の端部２２１ｂよりも内径側に位置している。 Further, as shown in FIG. 2 (d), the end portion 223c on the inner diameter side of the rake face portion 223 is located on the inner diameter side of the end portion 222b on the outer diameter side of the rake face portion 222, and the rake face portion 223 and A clearance portion 23 that is recessed toward the inner diameter side is provided at the boundary with the rake face portion 222.
That is, the end portion 223c of the rake face portion 223 located on the upstream side in the moving direction of the throw-away tip 2 and the lower surface 222d of the rake face portion 222 located on the downstream side are in the radial direction of the rotation axis X (the axial direction of the virtual line Ln). ) To overlap.
In addition, the clearance part 23 is provided also in the boundary part of the rake face part 221 and the rake face part 222, and the end part 222c on the inner diameter side of the rake face part 222 has a larger inner diameter than the end part 221b on the outer diameter side of the rake face part 221. Located on the side.

図２の（ｂ）に示すように、すくい面２２０を構成する各すくい面部２２１、２２２、２２３の下面２２１ｄ、２２２ｄ、２２３ｄは、それぞれ加工面１０３ａに対して所定角度θ傾斜しており、すくい面２２０の下端に、尖り状の切削部２２０ａ（切削部２２１ａ、２２２ａ、２２３ａ）が形成されている。   As shown in FIG. 2B, the lower surfaces 221d, 222d, and 223d of the rake face portions 221, 222, and 223 constituting the rake face 220 are inclined at a predetermined angle θ with respect to the machining surface 103a. A sharp cutting portion 220a (cutting portions 221a, 222a, 223a) is formed at the lower end of the surface 220.

以下、かかる構成のスローアウェイチップ２を用いたワークＷの加工面１０３ａの切削を説明する。
切削装置１の基軸部１１を回転軸Ｘ回りに回転させて、スローアウェイチップ２を回転軸Ｘ周りの周方向に移動させつつ、スローアウェイチップ２の刃部２２をワークＷの加工面１０３ａに圧接させると、加工面１０３ａが、スローアウェイチップ２のすくい面２２０（すくい面部２２１、２２２、２２３）に設けた尖り状の切削部２２０ａ（切削部２２１ａ、２２２ａ、２２３ａ）で切削される。 Hereinafter, cutting of the processing surface 103a of the workpiece W using the throw-away tip 2 having such a configuration will be described.
The base portion 11 of the cutting device 1 is rotated about the rotation axis X to move the throwaway tip 2 in the circumferential direction around the rotation axis X, and the blade portion 22 of the throwaway tip 2 is moved to the machining surface 103a of the workpiece W. When pressed, the processing surface 103a is cut by a sharp cutting portion 220a (cutting portions 221a, 222a, 223a) provided on the rake surface 220 (rake surface portions 221, 222, 223) of the throw-away tip 2.

この際、スローアウェイチップ２の各すくい面部２２１、２２２、２２３が、当該スローアウェイチップ２の移動方向でオフセットしており、尖り状の切削部２２１ａ、２２２ａ、２２３ａと加工面１０３ａとの各接触位置が、スローアウェイチップ２の移動方向でオフセットしている（図３の（ｂ）参照）。
そのため、加工面１０３ａの切削により発生する切削クズのロール（以下、切削クズロールＷａ）は、加工面１０３ａ全体の径方向の幅Ｗ１ではなく、各すくい面部２２１、２２２、２２３のそれぞれに対応して幅Ｗ１よりも狭い幅Ｗ２、Ｗ３、Ｗ４で形成されることになる（図３の（ａ）、（ｃ）参照）。 At this time, each rake face portion 221, 222, 223 of the throw-away tip 2 is offset in the moving direction of the throw-away tip 2, and each contact between the pointed cutting portions 221a, 222a, 223a and the machining surface 103a. The position is offset in the moving direction of the throw-away tip 2 (see FIG. 3B).
Therefore, the cutting scrap roll (hereinafter referred to as cutting scrap roll Wa) generated by cutting the processed surface 103a corresponds to each of the rake face portions 221, 222, and 223, not the radial width W1 of the entire processed surface 103a. They are formed with widths W2, W3, and W4 that are narrower than the width W1 (see FIGS. 3A and 3C).

さらに、すくい面部２２１とすくい面部２２２との境界と、すくい面部２２２とすくい面部２２３との境界に逃げ部２３が設けられており、スローアウェイチップ２の移動方向における上流側に位置するすくい面（例えば、すくい面部２２２）が、下流側に位置するすくい面（例えば、すくい面部２２１）の移動方向における後側に回り込んでいるので、周壁部１０３の加工面１０３ａを切削する際に、この逃げ部２３の部分で、すくい面部２２１の切削部２２１ａで生成される切削クズロールＷａと、すくい面部２２２の切削部２２２ａで生成される切削クズロールＷａとがより分断されやすくなる。
これにより、すくい面２２０で切削される加工面１０３ａ全体の径方向の幅Ｗ１よりも狭い幅Ｗ２、Ｗ３、Ｗ３の切削クズロールＷａが形成されることになる。 Further, a relief portion 23 is provided at the boundary between the rake face portion 221 and the rake face portion 222 and at the boundary between the rake face portion 222 and the rake face portion 223, and the rake face located on the upstream side in the moving direction of the throwaway tip 2 ( For example, since the rake face portion 222) wraps around the rear side in the moving direction of the rake face located on the downstream side (for example, the rake face portion 221), the clearance is cut when the machining surface 103a of the peripheral wall portion 103 is cut. In the portion 23, the cutting scrap roll Wa generated by the cutting portion 221 a of the rake face portion 221 and the cutting scrap roll Wa generated by the cutting portion 222 a of the rake face portion 222 are more easily divided.
As a result, cutting scraps Wa having widths W2, W3, and W3 narrower than the radial width W1 of the entire processing surface 103a to be cut by the rake face 220 are formed.

さらに、回転軸Ｘの径方向で、外径側に位置するすくい面ほど、スローアウェイチップ２の移動方向における上流側に位置しており、内径側のすくい面で形成された切削クズロールＷａの径方向外側への移動が、径方向外側で隣接する他のすくい面により阻害されないので、切削クズを速やかに径方向外側に排出させることができる。   Further, the rake face located on the outer diameter side in the radial direction of the rotation axis X is located on the upstream side in the moving direction of the throw-away tip 2, and the diameter of the cutting scrap roll Wa formed by the rake face on the inner diameter side. Since movement to the outside in the direction is not hindered by another rake face adjacent on the outside in the radial direction, cutting scraps can be quickly discharged to the outside in the radial direction.

以上の通り、実施の形態では
（１）刃部２２を有するスローアウェイチップ２を回転軸Ｘ周りの周方向に移動させながら、スローアウェイチップ２の移動方向における刃部２２の下流側の一辺に設けたすくい面２２０により、ワークＷの表面（ワークの円筒状の端面）の加工面１０３ａを切削する切削装置１において、
回転軸Ｘ方向から見て回転軸Ｘの径方向に延びるすくい面２２０を径方向で複数に分割して径方向に連なる複数のすくい面部２２１、２２２、２２３で構成し、径方向で連なる複数のすくい面部２２１、２２２、２２３のうち、径方向で隣接するすくい面部同士（すくい面部２２１とすくい面部２２２、すくい面部２２２とすくい面部２２３）を、移動方向にオフセットさせ、
径方向で連なる複数のすくい面部２２１、２２２、２２３を、径方向における外側に位置するすくい面部ほど、スローアウェイチップ２の移動方向における上流側に位置させて、最も回転軸Ｘに近い内径側に位置するすくい面部２２１が、スローアウェイチップ２の移動方向における最も下流側に位置していると共に、最も回転軸Ｘから離れて位置する外径側のすくい面部２２３が、スローアウェイチップ２の移動方向における最も上流側に位置している構成とした。 As described above, in the embodiment, (1) while the throwaway tip 2 having the blade portion 22 is moved in the circumferential direction around the rotation axis X, on one side downstream of the blade portion 22 in the moving direction of the throwaway tip 2. In the cutting apparatus 1 that cuts the processing surface 103a of the surface of the workpiece W (cylindrical end surface of the workpiece) by the provided rake surface 220,
The rake face 220 extending in the radial direction of the rotation axis X when viewed from the rotation axis X direction is divided into a plurality of rake face portions 221, 222, and 223 that are divided in the radial direction, and a plurality of rake face portions 221, 222, 223 that are continuous in the radial direction Of the rake face portions 221, 222, and 223, the rake face portions that are adjacent in the radial direction (the rake face portion 221 and the rake face portion 222, the rake face portion 222 and the rake face portion 223) are offset in the moving direction,
A plurality of rake face portions 221, 222, and 223 that are continuous in the radial direction are positioned on the upstream side in the moving direction of the throw-away tip 2 toward the inner diameter side closest to the rotation axis X, as the rake face portions located on the outer side in the radial direction The rake face portion 221 that is positioned is located on the most downstream side in the moving direction of the throwaway tip 2, and the rake face portion 223 that is located farthest from the rotation axis X is the moving direction of the throwaway tip 2. The configuration is located on the most upstream side.

このように構成すると、回転軸Ｘ径方向で隣接するすくい面部同士（すくい面部２２１とすくい面部２２２、すくい面部２２２とすくい面部２２３）が、スローアウェイチップ２の移動方向にオフセットしており、径方向で隣接するすくい面（すくい面部２２１とすくい面部２２２、すくい面部２２２とすくい面部２２３）の境界に段差が形成される。
よって、刃部２２のすくい面２２０が、径方向に直線状に形成されておらず、径方向の途中位置に段差があることにより、切削により形成される帯状の切削クズロールＷａが、この段差の部分を境にして分断されるので、発生する切削クズロールＷａの幅を狭くすることができる。
これにより、切削クズロールＷａの各々の幅が小さいので、ワークＷ上に設けられた溝などに嵌まり難くなるので、切削クズが、エアブローなどで除去されずに切削加工後のワークＷに残らないようにすることができる。 If comprised in this way, the rake face parts (rake face part 221 and rake face part 222, rake face part 222 and rake face part 223) which adjoin in the rotation-axis X radial direction are offset in the moving direction of throwaway tip 2, and diameter A step is formed at the boundary between the rake faces adjacent in the direction (rake face part 221 and rake face part 222, rake face part 222 and rake face part 223).
Therefore, the rake face 220 of the blade portion 22 is not formed linearly in the radial direction, and there is a step at a midway position in the radial direction. Since it is divided at the boundary, the width of the generated cutting scrap roll Wa can be reduced.
Thereby, since each width | variety of the cutting waste roll Wa is small, since it becomes difficult to fit in the groove | channel etc. which were provided on the workpiece | work W, cutting waste does not remain in the workpiece | work W after cutting without being removed by an air blow etc. Can be.

また、回転軸Ｘの径方向で、外径側に位置するすくい面部ほど、スローアウェイチップ２の移動方向における上流側に位置しているので、内径側のすくい面部で形成された切削クズロールＷａの径方向外側への移動が、径方向外側で隣接する他のすくい面部により阻害されない。これにより、切削クズロールＷａを速やかに径方向外側に排出させることができるので、加工面１０３ａの近傍に、生成された切削クズロールＷａが滞留して、加工面１０３ａの近傍の溝などに、切削クズロールＷａが挟まって残留することなどを好適に防止できる。   Further, since the rake face portion positioned on the outer diameter side in the radial direction of the rotation axis X is positioned on the upstream side in the moving direction of the throw-away tip 2, the cutting scraps Wa formed by the rake face portion on the inner diameter side is arranged. The movement to the outside in the radial direction is not hindered by the other rake face portion adjacent on the outside in the radial direction. As a result, the cutting scrap roll Wa can be quickly discharged radially outward, so that the generated cutting scrap roll Wa stays in the vicinity of the processing surface 103a, and the cutting scrap roll Wa enters the groove in the vicinity of the processing surface 103a. It is possible to suitably prevent the Wa from being left behind.

（２）径方向で隣接するすくい面部（すくい面部２２１とすくい面部２２２、すくい面部２２２とすくい面部２２３）同士の境界部では、スローアウェイチップ２の移動方向における下流側のすく面部の端部２２１ｂ、２２２ｂと、上流側に位置しているすくい面部の端部２２２ｃ、２２３ｃとが、径方向に重なるように設けられており、下流側に位置しているすくい面部２２１の端部２２１ｂの上流側と、すくい面部２２２の端部２２２ｂの上流側に、それぞれ逃げ部２３の空間が形成されている構成とした。 (2) At the boundary portion between the rake face portions (rake face portion 221 and rake face portion 222, rake face portion 222 and rake face portion 223) that are adjacent in the radial direction, end 221b of the rake face portion on the downstream side in the moving direction of throwaway tip 2 222b and the end portions 222c and 223c of the rake face portion located on the upstream side are provided so as to overlap in the radial direction, and are upstream of the end portion 221b of the rake face portion 221 located on the downstream side. And the space of the escape part 23 was each formed in the upstream of the edge part 222b of the rake face part 222.

このように構成すると、この逃げ部２３の部分で、すくい面部２２１の切削部２２１ａで生成される切削クズロールＷａと、すくい面部２２２の切削部２２２ａで生成される切削クズロールＷａとがより分断されやすくなると共に、すくい面部２２２の切削部２２２ａで生成される切削クズロールＷａと、すくい面部２２３の切削部２２３ａで生成される切削クズロールＷａとがより分断されやすくなる。
これにより、加工面１０３ａ全体の径方向の幅Ｗ１よりも狭い幅Ｗ２、Ｗ３、Ｗ４の切削クズロールＷａが形成されることになるので、生成された切削クズロールＷａが加工面１０３ａの近傍の溝などに切削クズロールＷａが挟まって残留することなどを好適に防止できる。 If comprised in this way, in this escape part 23 part, the cutting scrape roll Wa produced | generated by the cutting part 221a of the rake face part 221 and the cutting scrape roll Wa produced | generated by the cutting part 222a of the rake face part 222 will be divided more easily. At the same time, the cutting scrap roll Wa generated by the cutting portion 222a of the rake face portion 222 and the cutting scrap roll Wa generated by the cutting portion 223a of the rake face portion 223 are more easily divided.
As a result, cutting scraps Wa having widths W2, W3, and W4 narrower than the radial width W1 of the entire processing surface 103a are formed. Therefore, the generated cutting scraps Wa are formed in grooves near the processing surface 103a, etc. Thus, it is possible to suitably prevent the cutting scraps Wa from being sandwiched between them.

さらに、前記した実施の形態では、すくい面部２２１、２２２、２２３の下面２２１ｄ、２２２ｄ、２２３ｄを、それぞれ加工面１０３ａに対して、同じ所定角度θ傾斜させて、すくい面２２０の下端に、尖り状の切削部２２０ａ（切削部２２１ａ、２２２ａ、２２３ａ）を形成した場合を例示した（図２の（ｂ）参照）が、すくい面部２２１、２２２、２２３の下面２２１ｄ、２２２ｄ、２２３ｄを、加工面１０３ａに対してそれぞれ異なる角度（θａ、θｂ、θｃ）で傾斜させて、尖り状の切削部２２０ａ（切削部２２１ａ、２２２ａ、２２３ａ）を形成しても良い（図４参照）。
このようにすることによっても、尖り状の切削部２２１ａ、２２２ａ、２２３ａで生成される切削クズロールＷａに違い（例えば、厚みの違い）が生じるので、この場合にも、発生する切削クズロールＷａの幅を狭くすることができる。 Further, in the above-described embodiment, the lower surfaces 221d, 222d, and 223d of the rake face portions 221, 222, and 223 are inclined at the same predetermined angle θ with respect to the processing surface 103a, respectively, and the rake face 220 is pointed at the lower end. The cutting part 220a (the cutting parts 221a, 222a, and 223a) is illustrated as an example (see FIG. 2B). However, the lower surfaces 221d, 222d, and 223d of the rake face parts 221, 222, and 223 are formed on the processing surface 103a. May be inclined at different angles (θa, θb, θc) to form pointed cutting portions 220a (cutting portions 221a, 222a, 223a) (see FIG. 4).
Also by doing so, a difference (for example, a difference in thickness) occurs in the cutting scrap roll Wa generated by the sharp cutting portions 221a, 222a, 223a. In this case as well, the width of the generated cutting scrap roll Wa Can be narrowed.

さらに、前記した実施の形態では、すくい面２２０を３つに分割して、径方向に３つのすくい面２２１、２２２、２２３を設けた場合を例示したが、すく面部の数は、すくい面２２０の途中に段差が形成される範囲内の任意の整数であれば良い。   Furthermore, in the above-described embodiment, the case where the rake face 220 is divided into three and three rake faces 221, 222, and 223 are provided in the radial direction is illustrated, but the number of rake face portions is the rake face 220. Any integer within a range in which a step is formed in the middle of is acceptable.

１ 切削装置
２ スローアウェイチップ（チップ）
１１ 基軸部
１２ フランジ部
１２ａ 対向部
１３ 支持部
１４ 取付部
１５ 保持プレート
２０ 基部
２１ 把持部
２１ａ 側面
２２ 刃部
２２ｂ 端部
２３ 逃げ部
１０１ 基部
１０２ 開口
１０３ 周壁部
１０３ａ 加工面
２２０ すくい面
２２１、２２２、２２３ すくい面部
２２０ａ、２２１ａ、２２２ａ、２２３ａ 切削部
２２１ｄ、２２２ｄ、２２３ｄ 下面
Ｌｎ 仮想線
Ｗ ワーク
Ｗａ 切削クズロール
Ｘ 回転軸 1 Cutting device 2 Throw away tip (chip)
DESCRIPTION OF SYMBOLS 11 Base shaft part 12 Flange part 12a Opposing part 13 Support part 14 Attachment part 15 Holding plate 20 Base part 21 Grasping part 21a Side face 22 Blade part 22b End part 23 Escape part 101 Base part 102 Opening 103 Peripheral wall part 103a Work surface 220 Rake face 221, 222 223 Rake face part 220a, 221a, 222a, 223a Cutting part 221d, 222d, 223d Lower surface Ln Virtual line W Work Wa Cutting scrap roll X Rotating shaft

Claims (2)

刃部を有するチップを回転軸周りの周方向に移動させながら、前記刃部に設けたすくい面により、ワークの円筒状の端面の表面を切削する切削装置において、
前記回転軸方向から見て前記回転軸の径方向に延びるすくい面を、前記径方向で複数に分割して前記径方向に連なる複数のすくい面部で構成し、前記径方向で連なる複数のすくい面部のうち、前記径方向で隣接するすくい面部同士を、前記移動方向にオフセットさせ、
前記径方向で連なる複数のすくい面部を、前記径方向における外側に位置するすくい面部ほど、前記チップの移動方向における上流側に位置させると共に、
前記チップの移動方向から見て前記すくい面の各々は、前記ワークの表面を切削する切削部を、前記ワークに当接する側縁に有しており、
前記すくい面各々の前記切削部は、前記チップの移動方向から見て、前記径方向に連なって直線状に設けられて、同一平面上に位置していることを特徴とする切削装置。 In the cutting apparatus for cutting the surface of the cylindrical end surface of the workpiece by the rake face provided in the blade portion while moving the tip having the blade portion in the circumferential direction around the rotation axis,
A rake face extending in the radial direction of the rotary shaft when viewed from the rotary axis direction is constituted by a plurality of rake face portions that are divided in the radial direction and continuous in the radial direction, and a plurality of rake face portions that are continuous in the radial direction. Among them, the rake face portions adjacent in the radial direction are offset in the moving direction,
Said plurality of rake face continuous with the radial direction, the more rake surface portion located outside in the radial direction, is positioned on the upstream side in the moving direction of the tip Rutotomoni,
Each of the rake faces as viewed from the direction of movement of the tip has a cutting portion that cuts the surface of the work at a side edge in contact with the work,
The cutting device of each of the rake faces is provided in a straight line continuously to the radial direction when viewed from the moving direction of the tip and is located on the same plane . 刃部を有するチップを回転軸周りの周方向に移動させながら、前記刃部に設けたすくい面により、ワークの円筒状の端面の表面を切削する切削装置において、
前記回転軸方向から見て前記回転軸の径方向に延びるすくい面を、前記径方向で複数に分割して前記径方向に連なる複数のすくい面部で構成し、前記径方向で連なる複数のすくい面部のうち、前記径方向で隣接するすくい面部同士を、前記移動方向にオフセットさせ、
前記径方向で連なる複数のすくい面部を、前記径方向における外側に位置するすくい面部ほど、前記チップの移動方向における上流側に位置させると共に、
前記径方向で隣接するすくい面部同士の境界部では、前記チップの移動方向における上流側に位置しているすくい面部の端部と、下流側に位置しているすくい面部の端部とが、前記径方向に重なるように設けられており、前記下流側に位置しているすくい面部の端部の上流側に空間が形成されていることを特徴とする切削装置。 In the cutting apparatus for cutting the surface of the cylindrical end surface of the workpiece by the rake face provided in the blade portion while moving the tip having the blade portion in the circumferential direction around the rotation axis,
A rake face extending in the radial direction of the rotary shaft when viewed from the rotary axis direction is constituted by a plurality of rake face portions that are divided in the radial direction and continuous in the radial direction, and a plurality of rake face portions that are continuous in the radial direction. Among them, the rake face portions adjacent in the radial direction are offset in the moving direction,
A plurality of rake face portions that are continuous in the radial direction are positioned on the upstream side in the moving direction of the chip as the rake face portions located on the outer side in the radial direction are
At the boundary part between the rake face parts adjacent in the radial direction, the end part of the rake face part located on the upstream side in the moving direction of the chip and the end part of the rake face part located on the downstream side are provided so as to overlap in the radial direction, characterized and to that switching cutting device that space is formed upstream of the end of the rake face which is located on the downstream side.
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JPS59196107A (en) * 1983-04-21 1984-11-07 Nippon Yakin:Kk Throw-away tip
EP0480576B1 (en) * 1990-10-10 1995-06-07 Iscar Ltd. An insert for a milling cutter
US5232319A (en) * 1990-10-25 1993-08-03 Iscar Ltd. Insert for a milling cutter
IL101636A (en) * 1992-04-17 1995-03-30 Iscar Ltd Milling insert
JPH11207508A (en) * 1998-01-21 1999-08-03 Mitsubishi Materials Corp Throaway tip and throwaway boring tool having the same
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JP2003165009A (en) * 2001-11-30 2003-06-10 Kyocera Corp Throwaway tip for drill
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