JPH07299610A - Cutting insert - Google Patents

Cutting insert

Info

Publication number
JPH07299610A
JPH07299610A JP9239494A JP9239494A JPH07299610A JP H07299610 A JPH07299610 A JP H07299610A JP 9239494 A JP9239494 A JP 9239494A JP 9239494 A JP9239494 A JP 9239494A JP H07299610 A JPH07299610 A JP H07299610A
Authority
JP
Japan
Prior art keywords
breaker
cutting edge
insert
chips
inclined plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9239494A
Other languages
Japanese (ja)
Inventor
Mutsumasa Nanba
睦政 難波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP9239494A priority Critical patent/JPH07299610A/en
Publication of JPH07299610A publication Critical patent/JPH07299610A/en
Pending legal-status Critical Current

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  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

PURPOSE:To stably and smoothly discharge chips by forming a cutting edge on the upper surface front end of a cutting insert, forming an inclined plane continuing toward a top part on a rear side upper surface of the cutting edge, and forming a breaker recessed part and/or breaker projections on the inclined plane. CONSTITUTION:An insert 1 is formed in a wedge shape in a side view, and an upper surface rear part and a under surface are respectively formed in a V-shaped groove, and it is gripped by and fixed to a jaw part of a tool holder so as to be freely mountable and demountable. In this case, a cutting edge 2 is formed on the upper surface front end, and a work is cut. An inclined plane 4 continuing with a top part 3 from the front end cutting edge 2 is formed on an upper surface, and a breaker recessed part 5 is formed in this central part. Thereby, the discharge direction of chips is stabilized by the inclined plane 4, and the chips are formed in a spring shape by the breaker recessed part 5, and are smoothly discharged. A pair of breaker projections 6 may be formed in left and right corner parts on the upper end of the inclined plane 4. Thereby, the spring-shaped chips are narrowly formed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、工具ホルダに着脱自在
に固定され、金属材料等を切削するインサートに関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert which is detachably fixed to a tool holder and cuts a metal material or the like.

【0002】[0002]

【従来の技術】従来より、例えば突っ切り/溝入れ用金
属切削インサート(以下、インサートと略称する)とし
て、図4の斜視図に例示する特公平4ー78401号の
発明の如く、インサート11の上面前端に形成した切刃
12から上面頂上部13にかけて又はその途中の領域
に、側面視円弧状のC面14が形成されるとともに、該
C面14上には1個又は2個の突状15を形成してなる
インサート、あるいは特開昭54ー30388号の発明
の如く前記C面14にブレーカー凹陥部が形成されてな
るインサート11が用いられてきた。
2. Description of the Related Art Conventionally, for example, as a metal cutting insert for cut-off / grooving (hereinafter, simply referred to as insert), as in the invention of Japanese Patent Publication No. 4-78401 illustrated in the perspective view of FIG. A C surface 14 having an arcuate shape in a side view is formed from the cutting edge 12 formed at the front end to the top surface apex 13 or in an area in the middle thereof, and one or two protrusions 15 are formed on the C surface 14. Or an insert 11 in which a breaker concave portion is formed on the C surface 14 as in the invention of JP-A-54-30388.

【0003】このようなインサート11は、図5の略図
に示すように溝入れ加工に用いられる場合、回転するワ
ークWの側面に対し前記切刃12を作用させる。そし
て、図6に示すゼンマイ状の正常な切りくずを排出する
べく前記C面14が形成され、さらに図7に示す如く溝
巾に対し切りくず巾を狭くして切りくずがスムーズに排
出されるようにするため、切りくずの横端を内方に曲げ
るための前記突条15あるいはブレーカー凹陥部が形成
されていた。
When such an insert 11 is used for grooving as shown in the schematic view of FIG. 5, the cutting edge 12 acts on the side surface of the rotating work W. The C surface 14 is formed so as to discharge the spring-like normal chips shown in FIG. 6. Further, as shown in FIG. 7, the chip width is made narrower than the groove width, and the chips are discharged smoothly. In order to do so, the protrusion 15 or the breaker concave portion for bending the lateral end of the chip inward is formed.

【0004】[0004]

【従来技術の課題】しかしながら、上記従来技術は以下
のような欠点を有していた。すなわち、 前記C面が左右で大きさが異なったり、傾き方が異な
っている場合など、切りくずの排出方向が安定せず、ゼ
ンマイ状とならない。また、このような問題が起こらな
いようにC面を高精度に形成するのは非常に困難であ
る; 切刃の横端近傍に突条が形成されている場合、突条の
強度が小さく欠損しやすい; 刃先角度が小さいので刃先の強度が小さく欠損しやす
い; などの不具合があった。
However, the above-mentioned prior art has the following drawbacks. That is, in the case where the size of the C-face is different between the left and right, or the inclination is different, the chip discharge direction is not stable, and the spiral shape is not obtained. In addition, it is very difficult to form the C surface with high precision so that such a problem does not occur; when a ridge is formed near the lateral end of the cutting edge, the ridge has a small strength and is damaged. There is a problem such as: the blade angle is small, so the strength of the blade is low and the chip is easily broken.

【0005】[0005]

【課題を解決するための手段】このような従来技術の課
題を解決するため、本発明はインサートの上面前端に形
成した切刃の後側の上面に、頂上部に向かって連続する
斜平面を形成し、この斜平面にブレーカー凹陥部及び/
又はブレーカー突起を形成した。
In order to solve the above-mentioned problems of the prior art, the present invention provides an inclined flat surface continuous to the top on the rear upper surface of the cutting edge formed at the front end of the upper surface of the insert. Form the breaker recess and / or
Alternatively, a breaker protrusion is formed.

【0006】[0006]

【実施例】以下、本発明の実施例を図を用いて説明す
る。図1は、本実施例のインサート1の斜視図であり、
このインサート1は側面視略くさび状をなし、上面の後
側と下面がV字溝であることにより、工具ホルダーのジ
ョー部(不図示)に着脱自在に把持固定され、上面前端
に形成された切刃2でワークを切削し、金属材料に溝入
れ加工や、突っ切り加工を施す。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the insert 1 of this embodiment,
The insert 1 has a substantially wedge shape in a side view, and has V-shaped grooves on the rear side and the lower side of the upper surface, so that the insert 1 is detachably gripped and fixed to the jaw portion (not shown) of the tool holder, and is formed at the front end of the upper surface. The work is cut by the cutting blade 2, and the metal material is subjected to grooving and parting.

【0007】また、上記インサート1の上面には前端の
切刃2から頂上部3に連続する斜平面4が形成され、且
つこの斜平面4のほぼ中央に、臼蓋状のブレーカー凹陥
部5が形成されている。
A sloping plane 4 is formed on the upper surface of the insert 1 and extends from the cutting edge 2 at the front end to the apex 3 and a mortar-like breaker recess 5 is formed substantially at the center of the sloping plane 4. Has been formed.

【0008】このように構成されるインサート1は、切
刃2の後側が斜平面4となっていて、切りくずの排出方
向が安定する程度に精度良く、一定の傾斜角でもってこ
れを形成することが容易であり、かつ臼蓋状の上記ブレ
ーカー凹陥部5によって切りくずがゼンマイ状に形成さ
れ、且つ切りくずの横端も内側に向くので溝巾よりも充
分巾狭の切りくずとなり、ワークの壁面と干渉すること
なくスムーズに排出される。したがって、切りくずの噛
込みによる刃先の欠損等の問題がなく、切りくず処理も
安定する。
In the insert 1 constructed in this way, the rear side of the cutting edge 2 is a slanting plane 4, and the insert 1 is formed with a certain inclination angle with sufficient accuracy to stabilize the chip discharge direction. The chip is formed in a spring shape by the breaker concave portion 5 in the shape of a mortar and the lateral end of the chip faces inward, so that the chip becomes a chip narrower than the groove width. It is discharged smoothly without interfering with the wall surface of. Therefore, there is no problem such as chipping of the cutting edge due to biting of chips, and chip disposal is stable.

【0009】また、切刃2の後側が斜平面4となってい
るため、切くずは斜平面4に大きな衝撃を与えることな
く斜平面4上を滑っていくので、斜平面4に欠損が発生
せず、また刃先角度αを大きく取れるので、切刃2が欠
損することもない。
Further, since the rear side of the cutting edge 2 is the inclined plane 4, the chips slide on the inclined plane 4 without giving a large impact to the inclined plane 4, so that the inclined plane 4 is not damaged. In addition, since the cutting edge angle α can be made large, the cutting edge 2 is not damaged.

【0010】図2は、本発明によるインサート1の別態
様を示し、このインサート1は前記斜平面4の上端左右
隅部近傍に一対のブレーカー突起6、6が形成され、こ
のブレーカー突起6には、切りくずが当たってゼンマイ
状に形成され、且つ横端が内側に向いて巾狭となること
を補助する作用がある。
FIG. 2 shows another embodiment of the insert 1 according to the present invention. In this insert 1, a pair of breaker projections 6, 6 are formed in the vicinity of the upper left and right corners of the inclined plane 4, and the breaker projection 6 is formed on the breaker projection 6. , Has a function of assisting in forming a spiral shape by hitting chips and narrowing the lateral end inward.

【0011】なお、以上の実施例において、斜平面4に
形成されるブレーカー凹陥部5の下端と切刃2の距離d
が少なくとも5mm以上、好ましくは10mm以上であ
ることが望ましい。もし、上記距離dが5mmより小さ
い場合、ブレーカー凹陥部5の下端と切刃2間の領域の
強度が小さくなり、この部分に欠損が発生するおそれが
ある。
In the above embodiment, the distance d between the lower edge of the breaker concave portion 5 formed on the inclined plane 4 and the cutting edge 2 is d.
Is at least 5 mm or more, preferably 10 mm or more. If the distance d is less than 5 mm, the strength of the region between the lower edge of the breaker recessed portion 5 and the cutting edge 2 becomes small, and there is a risk of chipping at this portion.

【0012】図3は、本発明のインサート1の別態様で
あって、前記ブレーカー凹陥部5、或いはブレーカー突
起6のバリエーションを示している。
FIG. 3 shows another embodiment of the insert 1 of the present invention, showing a variation of the breaker concave portion 5 or the breaker projection 6.

【0013】同図に示すように、前記ブレーカー凹陥部
5は、加工物の性質や加工条件、加工環境に併せて例え
ば、臼蓋状の小凹陥部を4個組み合わせた如きもの、楕
円状の凹陥部を平行に2個組み合わせた如きもの、或い
は逆ハート型の凹陥部などでも良い。さらに、斜平面に
長方形状の浅凹陥部を形成し、この凹陥部内に臼蓋状の
凹陥部を設けたものであってもよく、また、この臼蓋状
の凹陥部の変わりにブレーカー突起6を形成しても良
い。
As shown in the figure, the breaker concave portion 5 has an elliptical shape, such as a combination of four mortar-shaped small concave portions, depending on the properties of the workpiece, the processing conditions, and the processing environment. It may be a combination of two recesses in parallel, or an inverted heart-shaped recess. Further, a rectangular shallow recessed portion may be formed on the inclined plane, and a mortar-shaped recessed portion may be provided in the recessed portion. Alternatively, the breaker projection 6 may be used instead of the mortar-shaped recessed portion. May be formed.

【0014】本発明のインサート1の形状等は、以上の
実施例のものに限定されるものではなく、本発明の目的
を逸脱するものでない限り、例えば前記ブレーカー凹陥
部5やブレーカー突起6の形状や大きさなどを任意に最
適なものとすることができる。なんとなれば、本発明の
もう一つの利点は、インサート1の強度を低下させるこ
となく、前記ブレーカー凹陥部5やブレーカー突起6を
形状、大きさを変化させることのみにより切りくずの処
理性、処理能力を容易にコントロールすることができる
からである。
The shape and the like of the insert 1 of the present invention are not limited to those of the above-mentioned embodiments, and unless the object of the present invention is deviated, for example, the shapes of the breaker concave portion 5 and the breaker projection 6 are formed. The size, size, etc. can be arbitrarily optimized. What is more, another advantage of the present invention is that the chip treatability and treatment can be performed only by changing the shape and size of the breaker concave portion 5 and the breaker protrusion 6 without lowering the strength of the insert 1. This is because the ability can be easily controlled.

【0015】なお、前記凹陥落部5の深さは0.2mm
〜2mmであることが好ましい。すなわち、上記深さが
0.2mmより小さいと、切りくずをゼンマイ状にカー
ルする能力が小さく、切りくずがほぼ直線上に排出され
て作業者を傷つける恐れがあり、他方、この深さが2m
mより大きいと、切りくずが凹陥落部5の最深部分に到
達せず、その結果、切りくずがほぼ直線上に排出されて
しまうという不具合がある。最適には、上記深さが0.
5mm〜1mmであることが好ましい。
The depth of the concave depression 5 is 0.2 mm.
It is preferably ˜2 mm. That is, if the depth is less than 0.2 mm, the ability to curl chips in a spiral shape is small, and the chips may be discharged in a substantially straight line, which may injure the operator, while the depth is 2 m.
If it is larger than m, the chips will not reach the deepest part of the recessed depression 5, and as a result, the chips will be discharged in a substantially straight line. Optimally, the depth is 0.
It is preferably 5 mm to 1 mm.

【0016】[0016]

【発明の効果】叙上のように、本発明のインサートは、
上面前端に形成した切刃の後側の上面に、頂上部に向か
って連続する斜平面を形成し、この斜平面にブレーカー
凹陥部及び/又はブレーカー突起を形成したことによ
り、 切りくずの排出方向が安定する程度に精度良く、一定
の傾斜角でもってこれを形成することが容易であり、か
つブレーカー凹陥部及び/又はブレーカー突起によって
切りくずがゼンマイ状に形成され、且つ切りくずの横端
も内側に向いて曲げられるので溝巾よりも充分巾狭の切
りくずとなり、安定的に排出される。したがって、切り
くずの噛込みによる刃先の欠損等の問題がない; 切くずは前記斜平面に大きな衝撃を与えることなく斜
平面上を滑っていくので、この部分に欠損が発生せず; 刃先角度を大きく取れるので、切刃が欠損することが
ない; インサートの強度を低下させることなく、前記ブレー
カー凹陥部やブレーカー突起を形状、大きさを変化させ
ることのみにより切りくずの処理性、処理能力を容易に
コントロールすることができる; などの優れた効果を有するものである。
As described above, the insert of the present invention is
On the upper surface behind the cutting edge formed at the front edge of the upper surface, a slanting plane continuous toward the apex is formed, and by forming a breaker concave portion and / or a breaker projection on this slanting plane, the chip ejection direction Is stable enough to be formed easily with a constant inclination angle, and the chip is formed in a spiral shape by the breaker concave portion and / or the breaker projection, and the lateral edge of the chip is also formed. Since it is bent inward, it becomes chips that are sufficiently narrower than the groove width, and is discharged stably. Therefore, there is no problem such as chipping of the cutting edge due to chipping of chips; chips slip on the slanting plane without giving a large impact to the slanting plane, so no chipping occurs in this part; Since it can be taken large, the cutting edge will not be damaged; chip disposability and processing capacity are easy by only changing the shape and size of the breaker recess and the breaker protrusion without lowering the strength of the insert. It has an excellent effect such as that

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明実施例の切削インサートの斜視図であ
る。
FIG. 1 is a perspective view of a cutting insert according to an embodiment of the present invention.

【図2】別態様による本発明実施例の切削インサートの
斜視図である。
FIG. 2 is a perspective view of a cutting insert according to another embodiment of the present invention.

【図3】別態様による本発明実施例の切削インサートの
斜視図であって、ブレーカー凹陥部又はブレーカー突起
のバリエーションを示している。
FIG. 3 is a perspective view of a cutting insert of an embodiment of the present invention according to another aspect, showing variations of breaker recessed portions or breaker protrusions.

【図4】従来の切削インサートを示す斜視図である。FIG. 4 is a perspective view showing a conventional cutting insert.

【図5】突っ切り/溝入れ用切削インサートによる溝入
れ加工の状態を示す概略図である。
FIG. 5 is a schematic view showing a state of grooving processing by a cut-off / grooving cutting insert.

【図6】正常な切りくずと悪い切りくずを示す概略図で
ある。
FIG. 6 is a schematic view showing normal chips and bad chips.

【図7】突っ切り/溝入れ用切削インサートによる溝入
れ加工の状態を示す概略図であって、溝巾と切りくず巾
の関係を示す図である。
FIG. 7 is a schematic view showing a state of grooving processing by a cut-off / grooving cutting insert, showing a relationship between a groove width and a chip width.

【符号の説明】[Explanation of symbols]

1 (切削)インサート 2 切刃 3 頂上部 4 斜平面 5 ブレーカー凹陥部 6 ブレーカー突起 α 刃先角度 1 (Cutting) Insert 2 Cutting Edge 3 Top 4 Oblique Plane 5 Breaker Concave 6 Breaker Protrusion α Cutting Edge Angle

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 工具ホルダに着脱自在に固定され、金属
材料を切削するインサートであって、上面前端に切刃が
形成され、該切刃の後側の上面には頂上部に向かって連
続する斜平面を有するとともに、該斜平面にはブレーカ
ー凹陥部及び/又はブレーカー突起が形成されているこ
とを特徴とする切削インサート。
1. An insert which is detachably fixed to a tool holder and cuts a metal material, wherein a cutting edge is formed at a front end of an upper surface, and a cutting edge is formed continuously on the upper surface at the rear side of the cutting edge toward the top. A cutting insert having a sloping plane, and a breaker recess and / or a breaker projection being formed on the sloping plane.
JP9239494A 1994-04-28 1994-04-28 Cutting insert Pending JPH07299610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9239494A JPH07299610A (en) 1994-04-28 1994-04-28 Cutting insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9239494A JPH07299610A (en) 1994-04-28 1994-04-28 Cutting insert

Publications (1)

Publication Number Publication Date
JPH07299610A true JPH07299610A (en) 1995-11-14

Family

ID=14053208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9239494A Pending JPH07299610A (en) 1994-04-28 1994-04-28 Cutting insert

Country Status (1)

Country Link
JP (1) JPH07299610A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132588A (en) * 2006-10-31 2008-06-12 Kyocera Corp Cutting insert, cutting tool and cutting method using these
JP2011098427A (en) * 2009-11-09 2011-05-19 Mitsubishi Materials Corp Cutting insert
JP2011167805A (en) * 2010-02-18 2011-09-01 Mitsubishi Materials Corp Cutting insert for grooving/cutting-off
JP2013013942A (en) * 2011-06-30 2013-01-24 Fuji Heavy Ind Ltd Method for machining inside-diameter groove and grooving tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132588A (en) * 2006-10-31 2008-06-12 Kyocera Corp Cutting insert, cutting tool and cutting method using these
JP2011098427A (en) * 2009-11-09 2011-05-19 Mitsubishi Materials Corp Cutting insert
JP2011167805A (en) * 2010-02-18 2011-09-01 Mitsubishi Materials Corp Cutting insert for grooving/cutting-off
JP2013013942A (en) * 2011-06-30 2013-01-24 Fuji Heavy Ind Ltd Method for machining inside-diameter groove and grooving tool

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