JPH0857709A - Throw-away tip - Google Patents

Throw-away tip

Info

Publication number
JPH0857709A
JPH0857709A JP6221108A JP22110894A JPH0857709A JP H0857709 A JPH0857709 A JP H0857709A JP 6221108 A JP6221108 A JP 6221108A JP 22110894 A JP22110894 A JP 22110894A JP H0857709 A JPH0857709 A JP H0857709A
Authority
JP
Japan
Prior art keywords
cutting edge
throw
away tip
width
land
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
JP6221108A
Other languages
Japanese (ja)
Inventor
Kazuyuki Uno
和之 宇野
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.)
Tungaloy Corp
Original Assignee
Toshiba Tungaloy Co Ltd
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 Toshiba Tungaloy Co Ltd filed Critical Toshiba Tungaloy Co Ltd
Priority to JP6221108A priority Critical patent/JPH0857709A/en
Publication of JPH0857709A publication Critical patent/JPH0857709A/en
Pending legal-status Critical Current

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  • Milling Processes (AREA)

Abstract

PURPOSE: To provide a throw-away tip for a face milling cutter which is excellent in anti-defective properties and work surface characteristics, and in which cutting resistance is reduced. CONSTITUTION: A land width of an auxiliary cutting edge 13 is set to be narrower than a land width of a main cutting edge 2. The main cutting edge 2 is formed as a curved cutting edge of a recessed form of which level is lower at a farther position from a corner. A groove width of a breaker groove 6 is set narrow at the auxiliary cutting edge 3, large at the main cutting edge 2, and the largest at the center. A standing inclination surface of the breaker groove 6 is formed along the cutting edges as a wavy irregularity surface.

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、正面フライス用のスロ
ーアウェイチップに関し、特にブレーカ溝の備わるスロ
ーアウェイチップの切れ刃強度を保ちつつ、被加工面の
表面性状と切りくず排出を向上させるものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away tip for face milling, and particularly to improve the surface properties of a work surface and chip discharge while maintaining the cutting edge strength of a throw-away tip having a breaker groove. Is.

【0002】[0002]

【従来の技術】従来、すくい面にブレーカ溝の形成され
たフライス用のスローアウェイチップにおいて、ランド
の幅は全周にわたり一定である。またスローアウェイチ
ップの厚さ方向の切れ刃の高さに関しても全周にわたり
一定した高さとなっている。
2. Description of the Related Art Conventionally, in a throw-away tip for a milling machine having a breaker groove formed on a rake face, a land width is constant over the entire circumference. Moreover, the height of the cutting edge in the thickness direction of the throw-away tip is constant over the entire circumference.

【0003】[0003]

【発明が解決しようとする課題】たとえば、鋳鉄の如き
脆性材料の切削において、機械的衝撃力による切れ刃の
欠損を抑制するために、切れ刃部のランド幅を大きめに
とることは効果的な対策の一つであるが、このような形
状は切削抵抗を大きくし、被加工物表面の角部にコバ欠
けを起こしやすくなる。反対にランド幅が小さければ、
切れ刃強度の低下による境界欠損を招きやすい。
For example, in cutting a brittle material such as cast iron, it is effective to increase the land width of the cutting edge in order to prevent the cutting edge from being damaged by a mechanical impact force. As one of the countermeasures, such a shape increases the cutting resistance and easily causes edge chipping at the corner of the surface of the workpiece. On the contrary, if the land width is small,
Boundary defects are likely to occur due to reduction in cutting edge strength.

【0004】特にネガタイプのスローアウェイチップの
場合、厚さ方向に一定した切れ刃高さをもつ形状は、正
面フライスに装着されたときの角度がそのまま切削諸角
度となるために、軸方向すくい角は負となる。これも、
やはりコバ欠けを起こすなど切削性能低下の要因とな
る。
Particularly in the case of a negative type throw-away tip, a shape having a constant cutting edge height in the thickness direction has an axial rake angle because the angle when mounted on the face mill directly becomes the cutting angles. Is negative. This is also
After all, it causes cutting performance deterioration such as edge chipping.

【0005】[0005]

【課題を解決するための手段】本発明は、以上のような
問題に鑑みなされたものである。すなわち、主切れ刃と
副切れ刃とを有するスローアウェイチップの主切れ刃
を、コーナから離れるにしたがいスローアウェイチップ
の厚さ方向に低位にあるような凹状をなす曲線切れ刃と
する。主切れ刃および副切れ刃に連接するランドは、副
切れ刃部のランドL2が主切れ刃部のランドL1よりも狭
幅となるようにする。
The present invention has been made in view of the above problems. That is, the main cutting edge of the throw-away tip having the main cutting edge and the sub-cutting edge is a curved cutting edge having a concave shape that is lower in the thickness direction of the throw-away tip as the distance from the corner increases. The land L 2 connected to the main cutting edge and the sub cutting edge has a width smaller than that of the land L 1 of the main cutting edge portion.

【0006】ブレーカ溝は、ランドに連接してポジのす
くい面を形成する傾斜面と、最深部よりボス面まで立ち
上がる傾斜面とからなり、ブレーカ溝の溝幅は、副切れ
刃での溝幅W2が主切れ刃2での溝幅W1より狭幅であ
り、主切れ刃中央で最も広幅となるように形成する。ブ
レーカ溝の立ち上がりの傾斜面は、切れ刃稜に沿って波
状に繰り返す凹凸面にて構成するようにする。
The breaker groove is composed of an inclined surface that is connected to the land to form a positive rake surface and an inclined surface that rises from the deepest portion to the boss surface. The groove width of the breaker groove is the groove width of the sub cutting edge. W 2 is narrower than the width W 1 of the main cutting edge 2 is formed such that the widest in the main cutting edge center. The rising slope of the breaker groove should be formed as a corrugated surface that repeats in a wave shape along the cutting edge.

【0007】副切れ刃は、スローアウェイチップの逃げ
面側に突出する円弧状曲線とする。
The auxiliary cutting edge is an arc-shaped curve protruding toward the flank of the throw-away tip.

【0008】[0008]

【作用】スローアウェイチップの厚さ方向に凹状となっ
た曲線切れ刃は、正面フライスに組込まれたときの軸方
向すくい角を正角に近づける。特にネガタイプの正面フ
ライスの場合、負角が過大となるのが防止されるため
に、切削抵抗が減少し、切りくず排出が改善される。
The curved cutting edge, which is concave in the thickness direction of the throw-away tip, brings the rake angle in the axial direction closer to a regular angle when incorporated in a face mill. Particularly in the case of a negative type face milling machine, since the negative angle is prevented from becoming excessively large, cutting resistance is reduced and chip discharge is improved.

【0009】主切れ刃部のランドは、ランド幅を大きめ
にして耐欠損性を向上させたものである。正面フライス
に組込まれて正面切れ刃を形成することになる副切れ刃
のランドは、ランド幅を小さくとって切れ味を優先させ
たものとし、たとえば鋳鉄のような脆性材料のフライス
加工において、加工面あらさを向上させ、コバ欠けを抑
制する作用がある。
The land of the main cutting edge has a larger land width to improve fracture resistance. The land of the auxiliary cutting edge that will be incorporated into the front milling cutter to form the front cutting edge shall have a small land width to give priority to sharpness, for example, when milling brittle materials such as cast iron It has the effect of improving roughness and suppressing edge chipping.

【0010】逃げ面外方に円弧状にわずかに突出させた
副切れ刃は円弧状の正面切れ刃を形成し、正面フライス
のヒーリングやスローアウェイチップの組込みの際の多
少の組込み角度誤差を吸収し、さらい刃的効果によって
常に安定した良好な加工面あらさが得られるようにな
る。
The auxiliary cutting edge slightly protruding in an arc shape on the outside of the flank forms an arc-shaped front cutting edge, and absorbs some built-in angle error when healing the front milling cutter or assembling the throw-away tip. However, it is possible to always obtain a stable and good machined surface roughness by the effect of the flat blade.

【0011】ブレーカ溝は、正面フライスの中心方向す
くい角を正角側に近づけるものであり、やはり切削抵抗
を軽減させる効果をもつ。ブレーカ幅は、コーナ部で狭
幅として切込み深さの小さな軽切削に効果が現れるよう
にし、主切れ刃に沿って次第に広幅になるようにして荒
加工に好適するようにしている。さらに、切れ刃稜に沿
った波状に繰り返す凹凸面とすることは、排出される切
りくずが凹凸面の凸部とのみ接触するようになるため
に、切りくずの接触面積が少なくなって切削抵抗は減少
する。
The breaker groove makes the rake angle in the center of the face mill closer to the regular angle side, and also has the effect of reducing the cutting resistance. The breaker width is made narrow at the corner so that it is effective for light cutting with a small cutting depth and gradually widened along the main cutting edge to be suitable for roughing. In addition, if the corrugated surface is repeated in a wavy pattern along the cutting edge, the discharged chips come into contact only with the convex portions of the corrugated surface, reducing the contact area of the chips and reducing the cutting resistance. Decreases.

【0012】[0012]

【実施例】次に、本発明の一実施例について、図を参照
しながら説明する。
Next, an embodiment of the present invention will be described with reference to the drawings.

【0013】図1および図2は、ダブルチャンファ形の
スローアウェイチップにおける本発明の一実施例を示す
ものである。正方形平板状をなすネガタイプのスローア
ウェイチップ1の正方形の外縁主稜が主切れ刃2であ
り、4ヵ所のコーナにはそれぞれ対頂線に対称な2つの
副切れ刃3が形成されている。主切れ刃2および副切れ
刃3は、ボス面4より僅かに低位にあるようにして、チ
ップ装着時におけるクランプの押圧による切れ刃欠損を
防いでいる。
1 and 2 show an embodiment of the present invention in a double chamfer type throw-away tip. The square outer edge main edge of the negative throwaway tip 1 having a square flat plate shape is the main cutting edge 2, and two auxiliary cutting edges 3 symmetrical to the vertical line are formed at the four corners. The main cutting edge 2 and the sub cutting edge 3 are slightly lower than the boss surface 4 to prevent chipping of the cutting edge due to pressing of the clamp when mounting the chip.

【0014】主切れ刃2は、図2の如く、厚さ方向に凹
をなし中央部で最深となる円弧状の曲線切れ刃となって
いるために、正面フライスに組込まれたときの軸方向す
くい角が正に近づくようになり、切削抵抗の軽減と切り
くず排出の改善が図られる。
As shown in FIG. 2, the main cutting edge 2 is an arcuate curved cutting edge which is concave in the thickness direction and is deepest in the central portion. The rake angle comes closer to the positive, reducing cutting resistance and improving chip evacuation.

【0015】図3〜図5は本実施例スローアウェイチッ
プ1の各部分での断面を示したものであり、図6はコー
ナの拡大図である。主切れ刃2の断面図である図3に示
されたランド5のランド幅L1は切れ刃強度を保つため
に広幅にとり、副切れ刃3の断面図である図4に示され
たランド5のランド幅L2は狭幅のランド幅にして切れ
味を確保している。
3 to 5 are cross-sectional views of each part of the throw-away tip 1 of this embodiment, and FIG. 6 is an enlarged view of a corner. The land width L 1 of the land 5 shown in FIG. 3, which is a cross-sectional view of the main cutting edge 2, is wide to maintain the cutting edge strength, and the land 5 shown in FIG. The land width L 2 is set to a narrow land width to ensure sharpness.

【0016】ブレーカ溝6の溝幅は、主切れ刃2断面で
の溝幅W1が副切れ刃3断面での溝幅W2より大きくなる
ようにし、かつ溝幅W1はコーナから遠ざかるほど徐々
に広幅になるようにして、切込みの浅い軽切削のみなら
ず、切込みの深い荒加工においても切りくず詰りをなく
して切りくず排出が滑らかに行なわれるようになってい
る。
The groove width of the breaker groove 6, the main cutting edge 2 the groove width W 1 in a cross section is set to be larger than the groove width W 2 at the secondary cutting 3 section, and the groove width W 1 is farther from the corner By gradually widening the width, not only light cutting with shallow depth of cut but also rough cutting with deep depth of cut, chip clogging is eliminated and chips are smoothly discharged.

【0017】副切れ刃3断面でのブレーカ溝6に関し
て、ランド5に連接する傾斜面の傾斜角α2が主切れ刃
2での傾斜角α1より比較的大きくなるようにすること
は、加工面向上やコバ欠け対策の上から、さらに好まし
い。
Regarding the breaker groove 6 in the cross section of the auxiliary cutting edge 3, it is necessary to make the inclination angle α 2 of the inclined surface connected to the land 5 relatively larger than the inclination angle α 1 of the main cutting edge 2. It is more preferable in terms of improving the surface and preventing edge chipping.

【0018】ブレーカ溝6は、図5に示すように、前記
傾斜角α1および傾斜角α2をもつ傾斜面に連接して立ち
上がる傾斜面を、主切れ刃2および副切れ刃3に沿った
波状に凹凸を有する面となっているために、切削されて
排出される切りくずは凸部とのみ擦過し、全面では接触
しないようになるために、切りくず排出が一層滑らかと
なり、切削抵抗もより小さくなる。
As shown in FIG. 5, the breaker groove 6 has an inclined surface which is connected to the inclined surface having the inclination angle α 1 and the inclination angle α 2 and stands up along the main cutting edge 2 and the sub cutting edge 3. Since the surface has wavy unevenness, the chips that are cut and ejected rub only against the protrusions and do not come into contact with the entire surface, resulting in smoother chip evacuation and better cutting resistance. Get smaller.

【0019】図6において、副切れ刃3は逃げ面側にふ
くらんだ円弧状の曲線となっている。副切れ刃3は正面
フライスに装着されて正面切れ刃を形成するが、曲線切
れ刃とすることにより、正面フライスのヒーリングやス
ローアウェイチップの装着精度誤差などの多少の角度誤
差には左右されずに、安定した良好なる加工面が得られ
るようになる。
In FIG. 6, the sub-cutting edge 3 is an arc-shaped curve that bulges toward the flank. The auxiliary cutting edge 3 is attached to the front milling cutter to form a front cutting edge, but by making it a curved cutting edge, it is not affected by some angle errors such as healing of the front milling cutter and attachment error of the throw-away tip. In addition, a stable and good processed surface can be obtained.

【0020】図7および図8は、本発明スローアウェイ
チップの他の一実施例を示し、コーナがシングルチャン
ファとなったネガタイプに適用したものであって、同一
箇所には同一符合を付したものである。
FIGS. 7 and 8 show another embodiment of the throw-away tip of the present invention, which is applied to a negative type having a single chamfered corner, and the same parts are designated by the same reference numerals. Is.

【0021】[0021]

【発明の効果】本発明スローアウェイチップによれば、
正面フライス加工における切削抵抗の減少、加工面性状
の改善、滑らかな切りくず排出などが図られるようにな
る。特に、たとえば鋳鉄の如き脆性材料の切削に対し
て、コバ欠け抑制効果も発揮される。
According to the throw-away tip of the present invention,
Cutting resistance in face milling, improvement of machined surface quality, smooth chip evacuation, etc. will be achieved. In particular, the effect of suppressing edge chipping is also exerted when cutting brittle materials such as cast iron.

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

【図1】本発明スローアウェイチップの一実施例を示す
正面図である。
FIG. 1 is a front view showing an embodiment of a throw-away tip of the present invention.

【図2】上図の右側面図である。FIG. 2 is a right side view of the above figure.

【図3】図1におけるA−A線に沿う一部断面図であ
る。
3 is a partial cross-sectional view taken along the line AA in FIG.

【図4】図1におけるB−B線に沿う一部断面図であ
る。
FIG. 4 is a partial cross-sectional view taken along the line BB in FIG.

【図5】図1におけるC−C線に沿う一部断面図であ
る。
5 is a partial cross-sectional view taken along the line CC of FIG.

【図6】図1に示すスローアウェイチップのコーナの拡
大図である。
FIG. 6 is an enlarged view of a corner of the throw-away tip shown in FIG.

【図7】本発明スローアウェイチップの他の一実施例を
示す正面図である。
FIG. 7 is a front view showing another embodiment of the throw-away tip of the present invention.

【図8】上図の右側面図である。FIG. 8 is a right side view of the above figure.

【符号の説明】[Explanation of symbols]

1 スローアウェイチップ 2 主切れ刃 3 副切れ刃 5 ランド 6 ブレーカ溝 1 Throw-away tip 2 Main cutting edge 3 Secondary cutting edge 5 Land 6 Breaker groove

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成6年12月12日[Submission date] December 12, 1994

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】発明の名称[Name of item to be amended] Title of invention

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【発明の名称】 スローアウェイチップ[Title of the Invention] Throw-away tip

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 多角形平板状をなし、少なくとも上面に
おいて、その外縁主稜には主切れ刃2が形成され、コー
ナには副切れ刃3が形成され、かつ上面には主切れ刃2
および副切れ刃3に沿うブレーカ溝6の備わったスロー
アウェイチップ1において、 前記主切れ刃2は、コーナから遠ざかるにしたがいスロ
ーアウェイチップ1の厚さ方向に低位にあるようにされ
た凹状をなす曲線切れ刃であるとともに、前記主切れ刃
2および副切れ刃3にはランド5が連接し、副切れ刃3
のランド幅L1は主切れ刃2のランド幅L2よりも狭幅で
あることを特徴とするスローアウェイチップ。
1. A polygonal flat plate having a main cutting edge 2 formed on its outer edge main ridge, a sub cutting edge 3 formed on a corner, and a main cutting edge 2 formed on its upper surface at least on its upper surface.
In the throw-away tip 1 provided with the breaker groove 6 along the sub-cutting edge 3, the main cutting edge 2 has a concave shape that is positioned lower in the thickness direction of the throw-away tip 1 as the distance from the corner increases. In addition to being a curved cutting edge, a land 5 is connected to the main cutting edge 2 and the sub cutting edge 3, and the sub cutting edge 3
The throw away tip is characterized in that the land width L 1 thereof is smaller than the land width L 2 of the main cutting edge 2.
【請求項2】 ブレーカ溝6は、ランド5に連接してポ
ジのすくい面を形成する傾斜面と、最深部よりボス面4
まで立ち上がる傾斜面とからなり、ブレーカ溝6の溝幅
は、副切れ刃3での溝幅W2が主切れ刃2での溝幅W1
り狭幅であり、主切れ刃2中央で最も広幅となるように
形成された請求項1に記載のスローアウェイチップ。
2. The breaker groove 6 is an inclined surface which is connected to the land 5 to form a positive rake surface, and the boss surface 4 from the deepest portion.
The groove width of the breaker groove 6 is such that the groove width W 2 at the sub cutting edge 3 is narrower than the groove width W 1 at the main cutting edge 2, and the groove width at the center of the main cutting edge 2 is the largest. The throw-away tip according to claim 1, which is formed to have a wide width.
【請求項3】 ブレーカ溝6の立ち上がりの傾斜面は、
切れ刃に沿って波状に繰り返す凹凸面にて構成された請
求項1および請求項2に記載のスローアウェイチップ。
3. The rising slope of the breaker groove 6 is
The throw-away tip according to claim 1 or 2, wherein the throw-away tip is constituted by a corrugated surface that repeats in a wave shape along the cutting edge.
【請求項4】 副切れ刃3は、スローアウェイチップ1
の逃げ面側に突出する円弧状曲線切れ刃となっているこ
とを特徴とする請求項1〜請求項3に記載のスローアウ
ェイチップ。
4. The auxiliary cutting edge 3 is a throw-away tip 1.
The throw-away tip according to any one of claims 1 to 3, which is an arcuate curved cutting edge protruding toward the flank surface of the.
JP6221108A 1994-08-23 1994-08-23 Throw-away tip Pending JPH0857709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6221108A JPH0857709A (en) 1994-08-23 1994-08-23 Throw-away tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6221108A JPH0857709A (en) 1994-08-23 1994-08-23 Throw-away tip

Publications (1)

Publication Number Publication Date
JPH0857709A true JPH0857709A (en) 1996-03-05

Family

ID=16761615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6221108A Pending JPH0857709A (en) 1994-08-23 1994-08-23 Throw-away tip

Country Status (1)

Country Link
JP (1) JPH0857709A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237356A (en) * 2006-03-10 2007-09-20 Tungaloy Corp Face milling cutter
WO2007142224A1 (en) * 2006-06-06 2007-12-13 Mitsubishi Materials Corporation Cutting tool and cutting insert
WO2008087467A1 (en) * 2007-01-17 2008-07-24 Hexcel Composites, Ltd. Low temperature curing of toughened epoxy adhesives
JP2008543591A (en) * 2005-06-22 2008-12-04 イスカーリミテッド Cutting insert
JP2010536599A (en) * 2007-08-29 2010-12-02 デグテック エルティーディー Cutting insert
WO2010150907A1 (en) * 2009-06-26 2010-12-29 京セラ株式会社 Cutting insert, cutting tool, and method for manufacturing cut product using same
KR102197363B1 (en) * 2019-09-10 2021-01-05 주식회사 와이지-원 Cutting insert

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Cited By (16)

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Publication number Priority date Publication date Assignee Title
JP2008543591A (en) * 2005-06-22 2008-12-04 イスカーリミテッド Cutting insert
JP2007237356A (en) * 2006-03-10 2007-09-20 Tungaloy Corp Face milling cutter
KR101348459B1 (en) * 2006-06-06 2014-01-06 미쓰비시 마테리알 가부시키가이샤 Cutting tool and cutting insert
WO2007142224A1 (en) * 2006-06-06 2007-12-13 Mitsubishi Materials Corporation Cutting tool and cutting insert
EP2022584A1 (en) * 2006-06-06 2009-02-11 Mitsubishi Materials Corporation Cutting tool and cutting insert
JPWO2007142224A1 (en) * 2006-06-06 2009-10-22 三菱マテリアル株式会社 Cutting tools and cutting inserts
EP2022584A4 (en) * 2006-06-06 2010-01-27 Mitsubishi Materials Corp Cutting tool and cutting insert
WO2008087467A1 (en) * 2007-01-17 2008-07-24 Hexcel Composites, Ltd. Low temperature curing of toughened epoxy adhesives
JP2010536599A (en) * 2007-08-29 2010-12-02 デグテック エルティーディー Cutting insert
US8328472B2 (en) 2007-08-29 2012-12-11 Taegutec, Ltd. Cutting insert
WO2010150907A1 (en) * 2009-06-26 2010-12-29 京セラ株式会社 Cutting insert, cutting tool, and method for manufacturing cut product using same
US20120070240A1 (en) * 2009-06-26 2012-03-22 Hirohisa Ishi Cutting insert, cutting tool, and method of manufacturing machined product using the same
CN102427904A (en) * 2009-06-26 2012-04-25 京瓷株式会社 Cutting insert, cutting tool, and method for manufacturing cut product using same
US8961076B2 (en) 2009-06-26 2015-02-24 Kyocera Corporation Cutting insert, cutting tool, and method of manufacturing machined product using the same
KR102197363B1 (en) * 2019-09-10 2021-01-05 주식회사 와이지-원 Cutting insert
WO2021049786A1 (en) * 2019-09-10 2021-03-18 주식회사 와이지-원 Cutting insert

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