JPH0715207U - Throw-away tip - Google Patents
Throw-away tipInfo
- Publication number
- JPH0715207U JPH0715207U JP4283693U JP4283693U JPH0715207U JP H0715207 U JPH0715207 U JP H0715207U JP 4283693 U JP4283693 U JP 4283693U JP 4283693 U JP4283693 U JP 4283693U JP H0715207 U JPH0715207 U JP H0715207U
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- cutting
- throw
- breaker groove
- chip
- 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
Links
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
(57)【要約】
【目的】 高能率の倣い切削を可能ならしめ、工具寿命
も向上させた粗加工用のスローアウェイチップを提供す
る。
【構成】 切刃2に沿ってすくい面上にブレーカ溝4を
設け、さらに、このブレーカ溝から立ち上る中央ランド
部3を具備させてあるスローアウェイチップを改善の対
象としてこのチップのブレーカ溝4内に、切刃2よりも
上側に突出しない高さの突条6を、チップ中心側から延
びる線上に配置して設ける。切刃部で生成された切屑が
突条6の稜に接して流れるのでブレーカ溝との接触面積
が減少し、また、幅方向に波打つ形に変形して波の山頂
5bに衝突するので取り代が広がってもカール切断が確
実に行われる。
(57) [Abstract] [Purpose] To provide a throw-away insert for rough machining that enables highly efficient copy cutting and has improved tool life. [Structure] A throw-away tip provided with a breaker groove 4 on a rake face along a cutting edge 2 and further provided with a central land portion 3 rising from the breaker groove is targeted for improvement in the breaker groove 4 of this tip. In addition, the ridge 6 having a height that does not project above the cutting edge 2 is provided on the line extending from the chip center side. Since the chips generated at the cutting edge flow in contact with the ridges of the ridges 6, the contact area with the breaker groove is reduced, and since the chips are deformed in a wavy shape in the width direction and collide with the crests 5b of the waves, the machining allowance is reduced. Even if spreads, curl cutting is surely performed.
Description
【0001】[0001]
本考案は、切削用スローアウェイチップに関する。更に詳しくは、粗切削に用 いる円形チップ或いは大きなノーズ半径を有する多角形チップの切屑処理性を改 善して高能率の倣い切削を可能ならしめ、工具寿命も向上させたスローアウェイ チップに関する。 The present invention relates to a cutting insert for cutting. More specifically, the present invention relates to a throw-away insert that improves the chip disposability of a circular insert used for rough cutting or a polygonal insert having a large nose radius to enable highly efficient copy cutting and also improve the tool life.
【0002】[0002]
円形スローアウェイチップは、切刃の使用済領域と未使用領域をチップの適宜 の回転によってチェンジしていくので、チップブレーカとしては図7及び図8に 示すように、一定幅の溝4を円を画く切刃2に沿って堀り込んだ形状にするのが 一般的である。 The circular throw-away tip changes the used area and the unused area of the cutting edge by appropriate rotation of the tip. Therefore, as a chip breaker, as shown in Figs. It is common to have a shape that is dug along the cutting edge 2 that demarcates.
【0003】 断面形状が周方向の各部において一定する図示のブレーカ溝は、切削条件が変 わらなければ切屑の処理条件が一定に保たれるが切屑処理範囲が狭い。The breaker groove shown in the figure, whose cross-sectional shape is constant at each portion in the circumferential direction, keeps the chip processing conditions constant unless the cutting conditions change, but has a narrow chip processing range.
【0004】 また、丸チップやノーズ半径の大きなチップでは、切屑厚みが薄くなるので切 屑が切断され難く、切屑厚みが厚くなる高送りでしか使用できない。Further, since the chip thickness of a round chip or a chip having a large nose radius becomes thin, the chip is difficult to be cut, and it can be used only at high feed where the chip thickness becomes thick.
【0005】 さらに、変化の無いブレーカ溝では、取り代、送りが変動すると安定した対応 ができず、切屑処理が不充分になる。従って、従来の円形チップ、ノーズ半径大 のチップは、切削条件が変動する切削には不向きであった。Further, in the case of the breaker groove which does not change, it is not possible to deal with it stably if the machining allowance and the feed change, and the chip disposal becomes insufficient. Therefore, the conventional circular tip and tip with a large nose radius were not suitable for cutting with varying cutting conditions.
【0006】 そこで、実公昭62−34646号公報は、円形切刃から中央ボス部までの範 囲に波形曲面の連続した凹凸を等配することを提案している。同公報には、この 凹凸により波打たせた切刃で切屑に癖をつけ、変形し易くして切屑処理性を向上 させたとある。In view of this, Japanese Utility Model Publication No. 62-34646 proposes that the concavities and convexities of the corrugated curved surface are equally arranged in the range from the circular cutting edge to the central boss portion. According to the publication, the cutting edges wavy due to the unevenness give a habit to the chips to make them easier to deform and improve the chip handling property.
【0007】[0007]
切刃を波打たせると、取り代が小さければ問題は無いが、取り代が大きくなっ たときに切屑の接触面積が急増して切削抵抗が増大する。このため、取り代が大 きいときには高送りができず、取り代が小から大へ、送りが小から大へと変動す る倣い切削では加工条件を下げざるを得ず、高能率加工が望めない。 When the cutting edge is wavy, there is no problem if the machining allowance is small, but when the machining allowance becomes large, the contact area of the chips sharply increases and the cutting resistance increases. For this reason, when the machining allowance is large, high feed cannot be performed, and the machining conditions must be lowered in profiling cutting where the machining allowance fluctuates from small to large and the feed changes from small to large, and high efficiency machining is desired. Absent.
【0008】 本考案は、ブレーカ形状を工夫して切削処理範囲を拡大し、これにより高能率 での倣い切削を可能ならしめるとともに寿命向上の効果をもたらしたスローアウ ェイチップを提供することを課題としている。An object of the present invention is to provide a throwaway tip which devises a breaker shape to expand a cutting processing range, thereby making it possible to perform highly efficient copy cutting and also having an effect of improving a life. .
【0009】[0009]
本考案は、上記の課題を解決するため、円形の切刃又はノーズ半径の大きな多 角形状の切刃とこの刃に沿ってすくい面に形成されるブレーカ溝と、切刃よりも 位置の高い中央ランド部を有し、この中央ランド部の周壁はブレーカ溝の溝底か ら斜めに立ち上っているスローアウェイチップにおいて、前記ブレーカ溝内に、 切刃よりも上側に突出しない高さの綾のある突条を、切刃のほぼ法線方向、又は 切刃に対して垂直方向に延びる線上に複数個配置して設けたのである。 In order to solve the above problems, the present invention has a circular cutting edge or a polygonal cutting edge with a large nose radius, a breaker groove formed on the rake face along this blade, and a position higher than the cutting edge. In a throw-away tip that has a central land part, and the peripheral wall of this central land part rises diagonally from the groove bottom of the breaker groove, in the breaker groove, a twill of a height that does not project above the cutting edge is provided. A plurality of certain ridges are arranged on the line extending in the direction substantially normal to the cutting edge or the direction perpendicular to the cutting edge.
【0010】[0010]
切刃部で生成された切屑は、ブレーカ溝を通って流出する。このとき、切屑は チップ中心からの放射線上に設けられた突条の稜線部を線接触状態で擦過して流 れ、中央ランド部の周壁に当たってカール切断される。 The chips generated at the cutting edge portion flow out through the breaker groove. At this time, the chips are rubbed against the ridge line portion of the ridge provided on the radiation from the center of the chip in a line contact state to flow, and hit the peripheral wall of the central land portion to be curled.
【0011】 取り代が大きければ、切屑は複数の突条の上部を擦過するが、これでも線接触 となることには変わりがなく、突条が無い場合のいわゆるベタ当りに比べて接触 面積が極端に小さく、そのため、切削抵抗が小さく、切削温度の上昇も少ない。If the machining allowance is large, the chips rub against the upper portions of the plurality of ridges, but this still results in line contact, and the contact area is smaller than the so-called solid contact without ridges. It is extremely small, so cutting resistance is small and cutting temperature rises little.
【0012】 また、突条がチップ中心側に向って延びているため、切屑の流出方向が規制さ れ、かつ、複数の突条への接触で切屑が幅方向に波打つ状態に変形する。Further, since the protrusion extends toward the center side of the chip, the outflow direction of the chips is restricted, and the chips are deformed into a wavy shape in the width direction by contact with the plurality of protrusions.
【0013】 この際、突条間の切屑は下向きに湾曲し、この湾曲部が中央ランド周壁に衝突 する。このため、切屑は変形し易い状態で歪を受け、良好にカール切断される。At this time, the chips between the ridges curve downward, and the curved portions collide with the peripheral wall of the central land. For this reason, the chips are distorted in a state where they are easily deformed, and the curls are satisfactorily cut.
【0014】 なお、工具寿命の向上は、切屑の接触面積の低減と、これによる切削温度上昇 の抑制によって実現される。The tool life is improved by reducing the chip contact area and suppressing the increase in cutting temperature.
【0015】[0015]
図1乃至図3に本考案の実施例を示す。例示のスローアウェイチップ1は、ポ ジチィブ形の円形チップであって、円をなす切刃2に沿ってすくい面上に、中央 ランド部3の周りを一周するブレーカ溝4を設けてある。 1 to 3 show an embodiment of the present invention. The illustrated throw-away tip 1 is a positive circular tip having a breaker groove 4 which goes around the central land portion 3 on the rake face along a circular cutting edge 2.
【0016】 中央ランド部3の周壁5は、ブレーカ溝4の溝底から斜めに立ち上がっている 。この傾斜周壁5を図のように周方向に規則的に波打つ形状にし、さらに、ブレ ーカ溝4内の所定位置に突条6を設置している。この突条6の長手直角断面を図 2に示す。突条6は、頂部に稜6aを有する断面三角形のものを例示したが、切 屑に線接触又はそれに近い状態で接触する稜を備えるものであればよく、その断 面形状は図の形に限定されない。例えば半円、半楕円等の断面をもつものでもよ い。The peripheral wall 5 of the central land portion 3 rises obliquely from the groove bottom of the breaker groove 4. As shown in the figure, the inclined peripheral wall 5 has a regular wavy shape in the circumferential direction, and a ridge 6 is provided at a predetermined position in the breaker groove 4. FIG. 2 shows a longitudinal cross section of the ridge 6. Although the ridge 6 has a triangular cross section having a ridge 6a at the top, it may be any ridge that has a line contact or a line contact with a chip in a state close to the line. Not limited. For example, it may have a cross section such as a semi-circle or a semi-ellipse.
【0017】 この突条6は、チップ中心から切刃のほぼ法線方向に延びる線上に複数個設置 してある。また、その高さは切刃2と同一高さ位置もしくはそれよりも低い位置 に稜6aがあるように定めてある。図3に、上記放射線に沿った位置のチップ断 面を示す。図中5aは周壁5の波の谷底を、5bは波の山頂を指している。A plurality of the ridges 6 are provided on a line extending from the center of the chip substantially in the normal direction of the cutting edge. Further, the height thereof is set so that the ridge 6a is located at the same height as the cutting edge 2 or at a position lower than that. FIG. 3 shows a chip cross section at a position along the above radiation. In the figure, 5a indicates the bottom of the wave on the peripheral wall 5, and 5b indicates the peak of the wave.
【0018】 図4は、例示の円形スローアウェイチップ1で被削材Aを加工する例を示して いる。チップ1は矢印で示すように送られて倣い切削を行う。この場合、取り代 が一定であっても、切刃の切削に関与する領域の長さが変動する。また、送りは 、被削材Aの形状と加工機の能力を考慮して変化させることが多い。従って、切 刃2にすくい取られて出来る切屑は幅、厚みが変動し、特に、切刃の切削関与領 域が広い場合、切断が困難になる。FIG. 4 shows an example of processing the work material A with the illustrated circular throw-away tip 1. The tip 1 is fed as shown by the arrow to perform the profile cutting. In this case, even if the stock removal is constant, the length of the region involved in the cutting of the cutting edge varies. Further, the feed is often changed in consideration of the shape of the work material A and the capability of the processing machine. Therefore, the width and thickness of the chips produced by the scooping by the cutting edge 2 vary, and it becomes difficult to cut especially when the cutting edge has a wide area involved in cutting.
【0019】 本考案の構成によれば、生成後の切屑が複数の突条6の稜6aに接してブレー カ溝部を溝から浮いた形で通過する。従って、ブレーカが単純な図7の従来チッ プに比べて切削抵抗が小さく、摩擦による発熱が少ない。According to the configuration of the present invention, the generated chips contact the ridges 6a of the plurality of ridges 6 and pass through the breaker groove portion while floating from the groove. Therefore, the cutting resistance is smaller than that of the conventional chip shown in FIG. 7, which has a simple breaker, and less heat is generated due to friction.
【0020】 また、突条6に接する部分と接しない部分ができるので、切屑は歪の不均一分 布により幅方向に波打つ状態に変形し、これにより切屑の厚みが相対的に増すた め切屑は折れ易くなる。この状態で下向きに湾曲した部分が周壁5の波の山頂5 b部に衝突する。この衝突点の位置は、チップ中心に向かって延びる突条6の案 内効果で切屑がチップ中心に向かおうとするので常に安定しており、しかも、こ の衝突部の接触面積は小さく流出抵抗の増加が少ないため、当該部でのカール切 断がスムーズに進行する。Further, since there is a portion that contacts the ridge 6 and a portion that does not contact the ridge 6, the chips are deformed into a wavy state in the width direction due to the uneven distribution of strains, which increases the thickness of the chips relatively, and Is easy to break. In this state, the downwardly curved portion collides with the wave peak 5b of the peripheral wall 5. The position of this collision point is always stable because the chips tend to move toward the center of the chip due to the internal effect of the ridge 6 extending toward the center of the chip, and the contact area of this collision part is small and the outflow resistance is small. The curl cut progresses smoothly at the relevant part because the increase in
【0021】 以上により、実公昭62−3464号公報に開示のチップに比べると取り代増 加時、切刃の切削関与幅増加時の切削抵抗が相対的に小さくなり、その分加工条 件を拡大して加工能率を向上させることが可能になる。As described above, compared with the insert disclosed in Japanese Utility Model Publication No. 62-3464, the cutting resistance when the machining allowance is increased and when the width involved in cutting of the cutting edge is increased becomes relatively small. It becomes possible to enlarge and improve processing efficiency.
【0022】 図5は大きなノーズ半径を持つ多角形チップへの適用例である。このスローア ウェイチップ11は、平面視形状は図1のチップと異なるが、構成上の相違は殆 んどない。このスローアウェイチップは、図6の加工例から判るように、ノーズ 半径部の切刃2が主として切削に関与するが、チップが被削材Aの端面に沿って 移動する際に直線切刃部も接触領域を変化させながら切削に関与する。従って、 効果は、前述の円形チップと同様である。FIG. 5 shows an example of application to a polygonal tip having a large nose radius. The throw-away tip 11 is different from the tip of FIG. 1 in plan view, but there is almost no difference in structure. As can be seen from the machining example of FIG. 6, in this throw-away tip, the cutting edge 2 of the nose radius part is mainly involved in cutting, but when the tip moves along the end surface of the work material A, the straight cutting edge part Also participates in cutting while changing the contact area. Therefore, the effect is similar to that of the circular chip described above.
【0023】[0023]
以上説明したように、本考案のスローアウェイチップは、ブレーカ溝内に設置 した突条の働きによって切削抵抗が低減され、かつ、切屑の幅、厚みが変動して も良好な切屑処理性が発揮されるため、取り代の大きな高能率倣い切削が可能に なり、生産性の向上に寄与できる。 As explained above, the throw-away insert of the present invention reduces cutting resistance due to the action of the ridges installed in the breaker groove, and exhibits good chip disposability even if the chip width and thickness fluctuate. As a result, high efficiency copying cutting with a large machining allowance is possible, which can contribute to improvement in productivity.
【0024】 また、切屑接触面積の低減、これによる切削熱の抑制により工具寿命が向上し 、加工コストにも好影響をもたらす。Further, the chip contact area is reduced and the cutting heat is suppressed thereby, so that the tool life is improved and the machining cost is also favorably influenced.
【図1】実施例のスローアウェイチップの斜視図FIG. 1 is a perspective view of a throw-away tip according to an embodiment.
【図2】同上のチップの要部の拡大断面図FIG. 2 is an enlarged cross-sectional view of a main part of the same chip as above.
【図3】突条の長手直角断面の一例を示す図FIG. 3 is a view showing an example of a longitudinal cross section of a ridge.
【図4】図1のスローアウェイチップの使用例を示す図FIG. 4 is a diagram showing an example of use of the throw-away tip of FIG.
【図5】他の実施例の斜視図FIG. 5 is a perspective view of another embodiment.
【図6】同上のチップの使用例を示す図FIG. 6 is a diagram showing an example of use of the same chip as above.
【図7】従来の円形チップの斜視図FIG. 7 is a perspective view of a conventional circular chip.
【図8】同上のチップの要部の拡大断面図FIG. 8 is an enlarged cross-sectional view of a main part of the same chip as above.
1、11 スローアウェイチップ 2 切刃 3 中央ランド部 4 ブレーカ溝 5 中央ランド部の周壁 5a 周壁の波の谷 5b 周壁の波の山頂 6 突条 6a 稜 A 被削材 1, 11 Throw-away tip 2 Cutting edge 3 Central land 4 Breaker groove 5 Central land peripheral wall 5a Circular wall wave trough 5b Circular wall wave crest 6 Ridge 6a Ridge A Work material
Claims (1)
形状の切刃とその刃に沿ってすくい面に形成されるブレ
ーカ溝と、切刃よりも位置の高い中央ランド部を有し、
この中央ランド部の周壁はブレーカ溝の溝底から斜めに
立ち上っているスローアウェイチップにおいて、前記ブ
レーカ溝内に、切刃よりも上側に突出しない高さの綾の
ある突条を、切刃のほぼ法線方向、又は切刃に対して垂
直方向に延びる線上に複数個配置して設けたことを特徴
とするスローアウェイチップ。1. A circular cutting edge or a polygonal cutting edge having a large nose radius, a breaker groove formed on a rake face along the cutting edge, and a central land portion higher in position than the cutting edge,
The peripheral wall of this central land portion is a throw-away tip that is obliquely rising from the groove bottom of the breaker groove, and in the breaker groove, a ridge having a twill of a height that does not project above the cutting edge is provided. A throw-away tip, wherein a plurality of throw-away tips are provided on a line extending in a substantially normal direction or a direction perpendicular to a cutting edge.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4283693U JPH0715207U (en) | 1993-08-04 | 1993-08-04 | Throw-away tip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4283693U JPH0715207U (en) | 1993-08-04 | 1993-08-04 | Throw-away tip |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0715207U true JPH0715207U (en) | 1995-03-14 |
Family
ID=12647064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4283693U Pending JPH0715207U (en) | 1993-08-04 | 1993-08-04 | Throw-away tip |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0715207U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010082732A (en) * | 2008-09-30 | 2010-04-15 | Mitsubishi Materials Corp | Cutting insert |
JP2012024926A (en) * | 2003-09-02 | 2012-02-09 | Kennametal Inc | Rotating cutting insert assembly, and method for using the same |
KR101444470B1 (en) * | 2006-02-15 | 2014-09-24 | 쎄코 툴스 에이비 | Cutting tool |
CN108515242A (en) * | 2018-06-25 | 2018-09-11 | 廊坊西波尔钻石技术有限公司 | A kind of cutter head and blade for finishing |
-
1993
- 1993-08-04 JP JP4283693U patent/JPH0715207U/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012024926A (en) * | 2003-09-02 | 2012-02-09 | Kennametal Inc | Rotating cutting insert assembly, and method for using the same |
KR101444470B1 (en) * | 2006-02-15 | 2014-09-24 | 쎄코 툴스 에이비 | Cutting tool |
JP2010082732A (en) * | 2008-09-30 | 2010-04-15 | Mitsubishi Materials Corp | Cutting insert |
CN108515242A (en) * | 2018-06-25 | 2018-09-11 | 廊坊西波尔钻石技术有限公司 | A kind of cutter head and blade for finishing |
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