JP2019126882A

JP2019126882A - Insert

Info

Publication number: JP2019126882A
Application number: JP2018010168A
Authority: JP
Inventors: 恭吾前田; Keigo Maeda
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2018-01-25
Filing date: 2018-01-25
Publication date: 2019-08-01

Abstract

To provide a positive insert whose both surfaces are usable.SOLUTION: An insert includes a first surface 2 and a second surface 3 which face opposite sides to each other. A first cutting edge 5 included in the first surface 2 and a second cutting edge 6 included in the second surface 3 are arranged at diagonal positions when viewed from a side surface 4 so as to include a first flank surface 7 and a second flank surface 8 each having the same flank surface shape as a positive insert.SELECTED DRAWING: Figure 4

Description

本発明は、切削工具のチップに関する。 The present invention relates to a cutting tool tip.

従来のチップには、着座面をなす下面と、該下面から上方に向かうにつれて外側に傾斜して立ち上がる周面である逃げ面と、前記下面の反対側に面する上面とを備えた略平板形状をなし、前記逃げ面と前記上面との交差稜線部が切れ刃を構成するポジチップがある（特許文献１）。 The conventional chip has a substantially flat plate shape including a lower surface that forms a seating surface, a flank that is a peripheral surface that rises outwardly from the lower surface, and an upper surface that faces the opposite side of the lower surface. There is a positive tip in which an intersecting ridge line portion between the flank and the upper surface forms a cutting edge (Patent Document 1).

従来のチップには、両面使用可能な、チップ自体に逃げ角がないネガチップもある（特許文献２）。 A conventional chip includes a negative chip that can be used on both sides and has no clearance angle (Patent Document 2).

特開２００２‐２３９８１４号公報JP 2002-239814 A 特開２０１０‐４２４６２号公報JP 2010-42462 A

特許文献１に記載されるようなポジチップは、切削抵抗を抑えやすく、切れ味が良いが、片面にしか切れ刃がなく経済的ではない傾向にある。特許文献２に記載されるようなネガチップは、両面使用可能なものがあり経済的だが、外径バイト等に取付ける際、取り付け角が負角なため、すくい角も負角になることが多く、切削抵抗が大きく切れ味は悪い傾向にある。 The positive chip as described in Patent Document 1 tends to suppress cutting resistance and has good sharpness, but tends to have an edge on only one side and is not economical. Negative chips as described in Patent Document 2 can be used on both sides and are economical, but when attached to an outer diameter tool or the like, the attachment angle is negative, so the rake angle is often negative, Cutting resistance is large and sharpness tends to be bad.

本発明は、以上の問題を解決する為になされたもので、ポジチップの特徴を保ったまま、両面使用可能なチップを提供することを目的としている。 The present invention has been made to solve the above problems, and it is an object of the present invention to provide a chip that can be used on both sides while maintaining the characteristics of the positive chip.

すなわち本発明は、
チップを着脱可能に保持するホルダを有する切削工具に使用されるチップであって、
互いに反対側に面する第一面及び第二面と、
該第一面の辺及び該第二面の辺をつなぐ側面と、
該第一面の辺の一部に形成された第一切れ刃と、
該第二面の辺の一部に形成され、該側面から見て該第一切れ刃に対して対角の位置にある第二切れ刃と、
該第一切れ刃から該第二面に向かって、該第一切れ刃を通り該第一面に垂直な面よりもチップの内側に逃げている第一逃げ面と、
該第二切れ刃から該第一面に向かって、該第二切れ刃を通り該第二面に垂直な面よりもチップの内側に逃げている第二逃げ面と、を備えるチップを提供する。 That is, the present invention
A tip used for a cutting tool having a holder that detachably holds the tip,
A first surface and a second surface facing away from each other;
A side surface connecting the side of the first surface and the side of the second surface;
A first cutting edge formed on a part of the side of the first surface;
A second cutting edge formed on a part of the side of the second surface and viewed diagonally from the first cutting edge as viewed from the side;
A first flank face that escapes from the first cutting edge toward the second surface, passing through the first cutting edge and inside the chip rather than a surface perpendicular to the first surface;
There is provided a chip comprising: a second flank face that escapes from the second cutting edge toward the first surface, passing through the second cutting edge and inside the chip from a plane perpendicular to the second surface. .

上記のように切れ刃を側面から見て対角の位置に配置することで、切れ刃が両面に存在しても、ポジチップと同様な逃げ面を形成することが可能となる。すなわち、両面使用可能な経済的なポジチップを提供することが可能となる。 As described above, by arranging the cutting edges at diagonal positions when viewed from the side, it becomes possible to form the same flank as the positive chip even if the cutting edges exist on both sides. That is, it is possible to provide an economical positive chip that can be used on both sides.

具体的には、前記チップは該第一面と該第二面が多角形であり、該第一面の各辺に該第一切れ刃が形成され、該第二面の各辺に該第二切れ刃が形成されるようにすることができる。 Specifically, in the chip, the first surface and the second surface are polygons, the first cutting edge is formed on each side of the first surface, and the first cutting edge is formed on each side of the second surface. Two cutting edges can be formed.

より具体的には、前記チップの該第一面及び該第二面が略三角形とされるようにすることができる。 More specifically, the first surface and the second surface of the chip may be substantially triangular.

また具体的には、前記チップの該第一面及び該第二面にチップブレーカーが形成されるようにすることができる。 More specifically, a chip breaker can be formed on the first surface and the second surface of the chip.

さらに本発明では、前記チップを備えた切削工具を提供する。 Furthermore, the present invention provides a cutting tool provided with the tip.

以下、本発明に係るチップの実施形態を添付図面に基づき説明する。 Hereinafter, an embodiment of a chip according to the present invention will be described based on the attached drawings.

本発明の第１の実施形態に係るチップの正面図である。It is a front view of the chip concerning a 1st embodiment of the present invention. 図１のチップの右側面図である。It is a right view of the chip | tip of FIG. 図１のチップの下面図である。It is a bottom view of the chip | tip of FIG. 図１のチップの斜視図である。It is a perspective view of the chip | tip of FIG. 本発明の一実施形態に係る切削工具の断面図である。It is sectional drawing of the cutting tool which concerns on one Embodiment of this invention. 本発明の第２の実施形態に係るチップの斜視図である。It is a perspective view of the chip concerning a 2nd embodiment of the present invention.

本発明の第１の実施形態に係るチップ１は、図１乃至図４に示す略平板状の略三角形からなり、互いに反対側に面する第一面２及び第二面３を備え、また、第一面２の辺と第二面３の辺をつなげた側面４を備える。第一面２の各辺の半分には第一切れ刃５が形成され、第二面３の辺の半分には第二切れ刃６が形成されており、第一切れ刃５と第二切れ刃６は、側面４から見て対角の位置となるように配置されている。 The chip 1 according to the first embodiment of the present invention is formed of a substantially flat plate-like, substantially triangular shape shown in FIGS. 1 to 4 and includes a first surface 2 and a second surface 3 facing opposite sides, and A side surface 4 is provided by connecting the side of the first surface 2 and the side of the second surface 3. A first cutting edge 5 is formed on half of each side of the first surface 2, and a second cutting edge 6 is formed on half of the side of the second surface 3. The blade 6 is disposed in a diagonal position as viewed from the side surface 4.

側面４には第一切れ刃５から第二面３に向かって、第一切れ刃５を通り第一面２に垂直な面よりもチップの内側に逃げている第一逃げ面７と、第二切れ刃６から第一面２に向かって、第二切れ刃６を通り第二面３に垂直な面よりもチップの内側に逃げている第二逃げ面８とを備える。この第一逃げ面７と第二逃げ面８とを備えることで、ネガチップのようにチップの取り付け角を負角にせずに、逃げ角を確保することができる。 On the side surface 4, a first flank 7 that runs from the first cutting edge 5 toward the second surface 3 through the first cutting edge 5 to the inside of the chip rather than a surface perpendicular to the first surface 2, The second flank 8 is provided from the second cutting edge 6 toward the first surface 2 and that passes through the second cutting edge 6 and escapes to the inside of the tip than the plane perpendicular to the second surface 3. By providing the first flank surface 7 and the second flank surface 8, it is possible to secure a clearance angle without making the mounting angle of the chip a negative angle as in the case of a negative chip.

なお、本実施形態ではチップ１の中央には取付穴９が形成され、この取付穴９にボルト等を通して切削工具に螺合してねじ止め固定する構造となっているが、本発明はこれに限定されるものではなく、ねじを用いない、いわゆるクランプオン方式の固定であってもよい。 In the present embodiment, a mounting hole 9 is formed in the center of the chip 1, and the mounting hole 9 is screwed into a cutting tool through a bolt or the like to be screwed and fixed. It is not limited and may be so-called clamp-on fixing without using a screw.

本発明の第２の実施形態に係るチップ１５は、図６に示すとおりチップブレーカー１６を備える。なお、チップブレーカー１６の形状は、本実施形態と異なる形状でもよい。 The chip 15 according to the second embodiment of the present invention includes a chip breaker 16 as shown in FIG. The shape of the chip breaker 16 may be different from that of the present embodiment.

図５に示す空気式面取り工具１０は、本発明に係るチップ１を備えた切削工具である。より詳しくは、レバー１１を押すとバルブ１２が開き、ベーン式エアモーター１３に圧縮空気が流れ、モーター１３が回転し、その回転がシャフトを通してチップホルダ１４に伝わり、チップホルダ１４に固定されたチップ１によってワークを加工することができる。チップ１には、第一切れ刃５及び第二切れ刃６があるが、第一切れ刃５が消耗したら、チップ１を裏返して固定することで第二切れ刃６を使用することができる。なお、第１の実施形態に係るチップ１は、第２の実施形態に係るチップ１５に変えてもよい。 The pneumatic chamfering tool 10 shown in FIG. 5 is a cutting tool provided with a tip 1 according to the present invention. More specifically, when the lever 11 is pushed, the valve 12 opens, compressed air flows to the vane type air motor 13, the motor 13 rotates, and the rotation is transmitted to the tip holder 14 through the shaft and fixed to the tip holder 14 1 can machine the workpiece. The chip 1 has a first cutting edge 5 and a second cutting edge 6. When the first cutting edge 5 is consumed, the second cutting edge 6 can be used by turning the chip 1 upside down and fixing it. The chip 1 according to the first embodiment may be replaced with the chip 15 according to the second embodiment.

なお、切れ刃の長さは本実施形態と異なる任意の長さでもよい。本実施形態では略三角形の形状のチップとなっているが、本発明はこれに限定されるものではなく、その他の多角形または第一面２と第二面３に少なくとも一辺がある多角形以外の形状でもよい。本発明に係るチップ１を備えた切削工具は、本実施形態に記載される空気式面取り工具に限定されず、その他切削工具でもよい。 The length of the cutting edge may be any length different from that of the present embodiment. In the present embodiment, the chip has a substantially triangular shape, but the present invention is not limited to this, and other polygons or polygons having at least one side between the first surface 2 and the second surface 3 The shape may be acceptable. The cutting tool provided with the tip 1 according to the present invention is not limited to the pneumatic chamfering tool described in the present embodiment, and may be other cutting tools.

チップ１；第一面２；第二面３；側面４；第一切れ刃５；第二切れ刃６；第一逃げ面７；第二逃げ面８；取付穴９；空気式面取り工具１０；レバー１１；バルブ１２；ベーン式エアモーター１３；チップホルダ１４；チップ１５；チップブレーカー；１６

Chip 1; First surface 2; Second surface 3; Side surface 4; First cutting edge 5; Second cutting edge 6; First flank 7; Second flank 8; Mounting hole 9; Lever 11; valve 12; vane air motor 13; tip holder 14; tip 15; tip breaker;

Claims

A tip used for a cutting tool having a holder that detachably holds the tip,
A first surface and a second surface facing away from each other;
A side surface connecting the side of the first surface and the side of the second surface;
A first cutting edge formed on a part of the side of the first surface;
A second cutting edge formed on a part of the side of the second surface and viewed diagonally from the first cutting edge as viewed from the side;
A first flank face that escapes from the first cutting edge toward the second surface, passing through the first cutting edge and inside the chip rather than a surface perpendicular to the first surface;
A second flank that escapes from the second cutting edge toward the first surface and passes through the second cutting edge to the inside of the chip rather than a surface perpendicular to the second surface.

The first surface and the second surface are polygonal, the first cutting edge is formed on each side of the first surface, and the second cutting edge is formed on each side of the second surface. Item 2. The chip according to Item 1.

The chip according to claim 2, wherein the first surface and the second surface are substantially triangular.

4. The chip according to claim 1, wherein a chip breaker is formed on the first surface and the second surface.

A cutting tool comprising the tip according to claim 1.