JPH0585512U - Cutting tools - Google Patents

Cutting tools

Info

Publication number
JPH0585512U
JPH0585512U JP9129391U JP9129391U JPH0585512U JP H0585512 U JPH0585512 U JP H0585512U JP 9129391 U JP9129391 U JP 9129391U JP 9129391 U JP9129391 U JP 9129391U JP H0585512 U JPH0585512 U JP H0585512U
Authority
JP
Japan
Prior art keywords
tip
cutting edge
cutting
blade tip
cutting blade
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.)
Granted
Application number
JP9129391U
Other languages
Japanese (ja)
Other versions
JP2539892Y2 (en
Inventor
辰夫 新井
貴宣 斉藤
弘章 林崎
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.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials 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 Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP1991091293U priority Critical patent/JP2539892Y2/en
Publication of JPH0585512U publication Critical patent/JPH0585512U/en
Application granted granted Critical
Publication of JP2539892Y2 publication Critical patent/JP2539892Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

(57)【要約】 【目的】 切刃チップの飛び出し防止のための凹部及び
凸部を設けても、切刃チップの着脱を容易かつ迅速に行
うことができ、かつ切刃チップの中央部に十分なクラン
プ力を作用させ得る切削工具を提供する。 【構成】 チップ取付溝22の軸方向拘束面40に凸部
43を形成する一方で、切刃チップ23の側面28に凹
部34を形成する。切刃チップ23の装着時には凸部4
3と凹部34とを嵌合させて工具本体21の径方向外周
側への切刃チップ23の飛び出しを防止する。凹部34
が側面28に形成されているので、切刃チップ23の着
脱時に切刃チップ23を上面27と交差する方向へ移動
させる必要がない。また、上下面27、29の中央部も
切り欠かれることがなく、十分なクランプ力を作用させ
得る。
(57) [Abstract] [Purpose] Even if a concave portion and a convex portion are provided to prevent the cutting edge tip from popping out, the cutting edge tip can be easily and quickly attached and detached, and the central portion of the cutting edge tip is A cutting tool capable of exerting a sufficient clamping force. [Structure] A convex portion 43 is formed on an axial restraining surface 40 of a tip mounting groove 22, while a concave portion 34 is formed on a side surface 28 of a cutting edge tip 23. When mounting the cutting edge tip 23, the convex portion 4
3 and the recess 34 are fitted to each other to prevent the cutting edge tip 23 from popping out to the radially outer peripheral side of the tool body 21. Recess 34
Since it is formed on the side surface 28, it is not necessary to move the cutting blade tip 23 in a direction intersecting the upper surface 27 when the cutting blade tip 23 is attached and detached. Further, the central portions of the upper and lower surfaces 27, 29 are not cut out, and a sufficient clamping force can be applied.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

この考案は、例えば正面フライスなどの切削工具に係り、なかでもアルミニウ ム合金等の軟質材料を切削する場合に用いて好適な切削工具に関する。 The present invention relates to a cutting tool such as a face mill, and more particularly to a cutting tool suitable for use in cutting a soft material such as an aluminum alloy.

【0002】[0002]

【従来の技術】[Prior Art]

アルミニウム合金等の軟質材料の切削においては、良好な加工精度と高い生産 性を実現するために、通常の鋼材の切削に比して遥かに高い切削速度が要求され ることが多く、このため加工に用いられる切削工具の回転数も数千r.p.m.から、 ときとして一万r.p.m.を越える高速領域に設定される。 ところで、このような高速領域で切削工具を回転させた場合、切刃チップを楔 部材で押さえつける構成のスローアウェイ式切削工具では、切刃チップに強大な 遠心力が作用し、これにより切刃チップが工具本体のチップ取付溝から外部へ飛 び出してしまう可能性がある。 そこで、かかる切刃チップの飛び出しを確実に防止する切削工具として、例え ば図9及び図10に示すような正面フライス1が提供されている(実開昭62− 68712号)。すなわち、図示の正面フライス1は、工具本体2のチップ取付 溝3に挿入される切刃チップ4が、クランプボルト5で締め付けられる楔部材6 によって工具本体2の周方向へ押さえ付けられてなるもので、チップ取付溝3の 周方向を向く底面3aにピン7が打ち込まれてその先端部が突出せしめられるこ とにより、当該底面3aに凸部8が形成される一方で、底面3aに当接する切刃 チップ4の下面9に凸部8と嵌合する凹部10が形成され、これら凸部8と凹部 10とが嵌合した状態で切刃チップ4が楔部材6によって押え込まれることによ り、切刃チップ4の工具外周側への飛び出し防止が図られている。 When cutting soft materials such as aluminum alloys, in order to achieve good processing accuracy and high productivity, a much higher cutting speed is often required compared to the cutting of ordinary steel materials. The rotational speed of the cutting tool used for the machine is set from several thousand rpm, and sometimes in the high-speed range over 10,000 rpm. By the way, when a cutting tool is rotated in such a high-speed region, with a throw-away type cutting tool configured to press the cutting edge tip with a wedge member, a strong centrifugal force acts on the cutting edge tip, which causes the cutting edge tip to operate. May pop out from the tip mounting groove of the tool body. Therefore, as a cutting tool for surely preventing the cutting edge tip from popping out, for example, a front milling cutter 1 as shown in FIGS. 9 and 10 is provided (Actual No. 62-68712). That is, the front face milling machine 1 shown in the drawing has a cutting edge tip 4 inserted in a tip mounting groove 3 of a tool body 2 and is pressed in the circumferential direction of the tool body 2 by a wedge member 6 tightened by a clamp bolt 5. The pin 7 is driven into the bottom surface 3a of the chip mounting groove 3 which faces the circumferential direction, and the tip of the pin 7 is projected so that the projection 8 is formed on the bottom surface 3a, while contacting the bottom surface 3a. A concave portion 10 that fits the convex portion 8 is formed on the lower surface 9 of the cutting blade tip 4, and the cutting blade tip 4 is pressed by the wedge member 6 with the convex portion 8 and the concave portion 10 fitted together. Therefore, the cutting edge tip 4 is prevented from protruding toward the outer peripheral side of the tool.

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

ところが、上述した従来の正面フライス1は、切刃チップ4の飛び出し防止に 関してはほぼ十分な効果が得られるものの、切刃チップ4を着脱する際の作業性 が悪く、この点でいまだ改善の余地があった。 すなわち、図9及び図10に示す正面フライス1では、チップ取付溝3の底面 3aから凸部8が飛び出しているので、切刃チップ4をチップ取付溝3に対して 着脱するには、楔部材6の側面6aとチップ取付溝3の底面3aとの間に切刃チ ップ4の厚さと凸部8の突出量とを加えた量を越える隙間をあけておく必要があ る。しかしながら、楔部材6の側面6aの底面3aに対する傾斜角が微小である ため、切刃チップ4を着脱可能ならしめるまでの隙間をあけるためにはクランプ ボルト5を相当数回転させて楔部材6をその挿入方向へ大きく移動させなければ ならず、この作業をすべての切刃チップ4について行えば作業時間が著しく増加 してしまうのである。 また、上述した従来の正面フライス1では、切刃チップ4の下面9のほぼ中央 に凹部10を形成しているため、切刃チップ4の中央部における厚さが減少して 剛性が低下する。このため、切刃チップ4のほぼ中央に作用する楔部材6のクラ ンプ力を軽減せざるを得なくなって切削中に切刃チップ4の位置がずれるおそれ が高まっていた。 この考案は、このような背景の下になされたもので、切刃チップの飛び出しを 防止しつつ、切刃チップの着脱作業を容易化、迅速化し、さらには、十分なクラ ンプ力を切刃チップの中央部に作用させることができる切削工具を提供すること を目的とする。 However, although the above-described conventional face milling machine 1 has almost sufficient effect in preventing the cutting edge tip 4 from popping out, the workability when attaching and detaching the cutting edge tip 4 is poor, and this point is still improved. There was room for That is, in the front milling cutter 1 shown in FIGS. 9 and 10, since the convex portion 8 projects from the bottom surface 3a of the tip mounting groove 3, the cutting blade tip 4 can be attached to and detached from the tip mounting groove 3 by a wedge member. It is necessary to provide a gap between the side surface 6a of 6 and the bottom surface 3a of the chip mounting groove 3 that exceeds the total amount of the thickness of the cutting tip 4 and the protruding amount of the convex portion 8. However, since the side surface 6a of the wedge member 6 has a small inclination angle with respect to the bottom surface 3a, the clamp bolt 5 is rotated a considerable number of times to open the wedge member 6 in order to make a gap until the cutting blade tip 4 is detachably attached. This requires a large movement in the insertion direction, and if this work is carried out for all the cutting edge tips 4, the working time will increase significantly. Further, in the above-described conventional face milling cutter 1, since the concave portion 10 is formed substantially in the center of the lower surface 9 of the cutting blade tip 4, the thickness at the central portion of the cutting blade tip 4 decreases and the rigidity decreases. For this reason, the clamping force of the wedge member 6 acting almost at the center of the cutting edge tip 4 has to be reduced, and the position of the cutting edge tip 4 is likely to shift during cutting. The present invention has been made under such a background, and prevents the cutting edge tip from popping out, facilitates and speeds up the attachment / detachment work of the cutting edge tip, and further provides a sufficient clamping force. An object of the present invention is to provide a cutting tool capable of acting on the central portion of the tip.

【0004】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

上記課題を解決するためにこの考案の切削工具は、チップ取付溝を有する略円 盤状の工具本体と、互いに反対方向を向く一対の上下面と該上下面の周囲に配置 される側面とを有する平板状の切刃チップとを具備してなり、上記チップ取付溝 は、上記工具本体の略周方向を向く底面と、この底面の一辺に沿って形成されて 上記工具本体の略軸線方向を向く軸方向拘束面とを有してなり、上記切刃チップ は、その上下面のいずれか一方を上記チップ取付溝の上記底面に当接させ、かつ 一の側面を上記チップ取付溝の上記軸方向拘束面に当接させた状態で上記工具本 体に取り付けられてなる切削工具であって、上記軸方向拘束面と、該軸方向拘束 面と当接する切刃チップの側面とのいずれか一方に上記軸方向拘束面と交差する 方向へ伸びる凸部が形成され、他方に上記凸部と嵌合可能な凹部が形成されてな ることを特徴とするものである。 In order to solve the above problems, a cutting tool of the present invention comprises a substantially disk-shaped tool body having a tip mounting groove, a pair of upper and lower surfaces facing in opposite directions, and side surfaces arranged around the upper and lower surfaces. And a bottom surface of the tool body facing substantially the circumferential direction and one side of the bottom surface to form a substantially axial direction of the tool body. The cutting edge tip has one of upper and lower surfaces abutting against the bottom surface of the tip mounting groove, and one side surface of the cutting edge tip facing the shaft of the tip mounting groove. A cutting tool attached to the tool body in a state of being brought into contact with a direction constraining surface, wherein one of the axial constraining surface and a side surface of a cutting edge tip contacting the axial constraining surface. Is a convex that extends in a direction that intersects the above axial restraint surface. There is formed, is characterized in that is the other the convex portion to be fitted to the recess in the form Rukoto.

【0005】 ここで、上記上下面が、これら上下面と交差する一の仮想中心軸との交点に関 して点対称をなす多角形状に形成されるとともに、上記側面が、上記仮想中心軸 に対して回転対称に配置されてなる切刃チップの場合には、当該切刃チップの側 面に、上記凹部または凸部を上記仮想中心軸に対して回転対称をなすように形成 することで、当該切刃チップの対称性を維持できる。Here, the upper and lower surfaces are formed in a polygonal shape that is point-symmetric with respect to an intersection with one virtual center axis intersecting with the upper and lower surfaces, and the side surface is formed in the virtual center axis. In the case of a cutting blade tip arranged in rotational symmetry with respect to each other, by forming the concave portion or the convex portion on the side surface of the cutting blade tip so as to be rotationally symmetrical with respect to the virtual center axis, The symmetry of the cutting edge tip can be maintained.

【0006】[0006]

【作用】[Action]

上記構成によれば、凹部と凸部とが嵌合することによって工具本体の略径方向 における切刃チップの飛び出しが防止される。そして、これら凹部と凸部との嵌 合方向がチップ取付溝の軸方向拘束面と交差する方向とされているので、切刃チ ップを着脱する際には切刃チップをチップ取付溝の底面に沿う方向へ移動させる だけで凸部を凹部に対して着脱できる。従って、切刃チップをチップ取付溝の底 面と交差する方向へ凸部の突出量以上移動させる必要もなく、このため、切刃チ ップを楔部材等によってチップ取付溝の底面へ押し付ける場合でも切刃チップの 着脱を容易になし得る。さらに、切刃チップに凹部が形成される場合でも、当該 凹部は切刃チップの側面に形成されるので、切刃チップの上下面中央部での肉厚 の低下は生じず、従って強度のクランプ力を作用させても問題がない。また、切 刃チップの側面に凸部が形成される場合には、切刃チップの肉厚減少が生じない ので、チップ剛性の低下防止に一層効果的である。 According to the above configuration, the recess and the protrusion are fitted to each other, whereby the cutting edge tip is prevented from protruding in the substantially radial direction of the tool body. Since the fitting direction of these recesses and protrusions is the direction intersecting the axial constraining surface of the chip mounting groove, the cutting edge chip must be attached to the chip mounting groove when attaching and detaching the cutting edge chip. The protrusion can be attached to and detached from the recess simply by moving it in the direction along the bottom surface. Therefore, it is not necessary to move the cutting edge tip in the direction intersecting the bottom surface of the chip mounting groove by more than the protrusion amount of the convex portion.For this reason, when the cutting edge chip is pressed against the bottom surface of the chip mounting groove by a wedge member or the like. However, the cutting edge tip can be easily attached and detached. Further, even when a concave portion is formed on the cutting edge tip, since the concave portion is formed on the side surface of the cutting edge tip, there is no reduction in the wall thickness at the center of the upper and lower surfaces of the cutting edge tip, and therefore the strength of the clamp is high. There is no problem in applying force. Further, when the convex portion is formed on the side surface of the cutting blade tip, the thickness of the cutting blade tip does not decrease, which is more effective in preventing the deterioration of the chip rigidity.

【0007】[0007]

【実施例】【Example】

以下、図1〜図4を参照して、本考案の一実施例を説明する。 図1及び図2に示すように、本実施例の正面フライス20では、略円盤状の外 観を呈する工具本体21の外周部に、当該工具本体21の先端面21aおよび外 周面21bに開口するチップ取付溝22が形成され、該チップ取付溝22に切刃 チップ23が挿入され、該切刃チップ23が、クランプボルト24で締め付けら れる楔部材25によってチップ取付溝22の周方向を向く底面26に押圧されて いる。 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1 and FIG. 2, in the front milling cutter 20 of the present embodiment, the front end face 21a and the outer peripheral face 21b of the tool body 21 are opened at the outer peripheral portion of the tool body 21 having a substantially disc-shaped appearance. Is formed, a cutting edge chip 23 is inserted into the chip mounting groove 22, and the cutting edge chip 23 is oriented in the circumferential direction of the chip mounting groove 22 by a wedge member 25 tightened with a clamp bolt 24. It is pressed against the bottom surface 26.

【0008】 ここで、図3〜図5により詳細に示すように、切刃チップ23は、超硬合金や セラミックスなどの硬質材料を多角形平板状に成形してなるもので、すくい面と される上面27と、該上面27と直交する方向に対して所定の正角α(例えば1 1゜ )で傾斜して当該切刃チップ23の逃げ面とされる側面28…と、上面27 に平行な下面29とを有し、上面27と側面28との交差稜線部には上面27の 角部Cを挟んで所定の頂角θで交差する主切刃30及び副切刃31が、角部Cの 個数に対応してそれぞれ4個づつ対形成されている。上面27及び下面29は、 これら上下面27、29と直交する一の仮想中心軸k1との交点Pに関して点対 称をなす多角形状に形成され、これにより上面27の各辺に形成された主切刃3 0は、それぞれの長さが等しくかつ互いの延長線が90゜ で交差するような位置 関係におかれている。また、各副切刃31の長さも相互に等しく、さらに各副切 刃31と各主切刃30とによって定められる頂角θもすべて等しく設定されてい る。そして、下面29は上面27に対して相似形に形成されている。Here, as shown in more detail with reference to FIGS. 3 to 5, the cutting edge tip 23 is formed by molding a hard material such as cemented carbide or ceramics into a polygonal flat plate shape, and is a rake face. Parallel to the upper surface 27, which is the flank surface of the cutting blade tip 23 that is inclined by a predetermined regular angle α (eg, 11 °) with respect to the direction orthogonal to the upper surface 27. And a lower surface 29, and a main cutting edge 30 and a sub cutting edge 31 that intersect at a predetermined apex angle θ with a corner C of the upper surface 27 sandwiched between the upper surface 27 and the side surface 28. Corresponding to the number of C, four pairs are formed each. The upper surface 27 and the lower surface 29 are formed in a polygonal shape that is point-symmetrical with respect to an intersection P with one virtual center axis k 1 orthogonal to the upper and lower surfaces 27, 29, and thus formed on each side of the upper surface 27. The main cutting edges 30 are in such a positional relationship that their lengths are equal and their extension lines intersect at 90 °. Further, the lengths of the respective sub cutting edges 31 are equal to each other, and the apex angles θ defined by the sub cutting edges 31 and the main cutting edges 30 are all set to be equal. The lower surface 29 is formed in a similar shape to the upper surface 27.

【0009】 また、側面28は、主切刃30に連なる主逃げ面32と、副切刃31に連なる 副逃げ面33とを有してなるもので、仮想中心軸k1に対して90゜ の位相をも って回転対称に配置されている。すなわち、側面28は、それぞれの逃げ角αが すべて等しく設定されるとともに、主逃げ面32と副逃げ面33との長さの比率 が一定に設定されることによってすべて同一形状とされ、かつ、各々の配置も、 切刃チップ23を仮想中心軸k1の回りに90゜ づつ回転させたときに当該切刃 チップ23の一側部に同一形状の側面28が繰り返し割り出されるような位置関 係におかれている。Further, the side surface 28 has a main flank 32 that is continuous with the main cutting edge 30 and a sub flank 33 that is continuous with the sub cutting edge 31 and is 90 ° with respect to the virtual center axis k 1 . Are arranged in rotational symmetry with the phase of. That is, the side surfaces 28 are all set to have the same shape by setting all the clearance angles α to be equal and setting the ratio of the lengths of the main clearance surface 32 and the sub clearance surface 33 to be constant, and Each arrangement also has such a positional relationship that the side surface 28 of the same shape is repeatedly indexed to one side of the cutting blade tip 23 when the cutting blade tip 23 is rotated by 90 ° around the virtual center axis k 1. I am in charge.

【0010】 そして、各側面28には、当該側面28から陥没する凹部34…が形成されて いる。これら凹部34は、主切刃30から下面29側へ一定量離された位置を上 端として、下面29へ向かうほど主逃げ面32から次第に大きく陥没し、それぞ れの下端は下面29に開口せしめられている。凹部34の幅wは上端から下端に かけて一定とされ、また、側面28に対する傾斜角sも上端から下端にかけて一 定とされている。そして、各々の凹部34の幅w及び傾斜角sは相互に等しく定 められ、かつ、角部Cから各凹部34の中央までの距離A及び上面27から凹部 34の上端までの距離Bも相互に等しく定められている。これにより、凹部34 も主逃げ面31と同様仮想中心軸k1の回りに90゜ の位相をもって回転対称に 配置されている。なお、図1〜図5において符号35は、側面28同士の交差稜 線部の欠けを防止すべく形成されたチャンファ面である。Further, each side surface 28 is formed with a concave portion 34 that is depressed from the side surface 28. These concave portions 34 gradually depress from the main flank 32 toward the lower surface 29 with the upper end at a position separated from the main cutting edge 30 toward the lower surface 29 side, and the lower ends of the concave portions 34 are opened to the lower surface 29. It has been confused. The width w of the recess 34 is constant from the upper end to the lower end, and the inclination angle s with respect to the side surface 28 is also constant from the upper end to the lower end. The width w and the inclination angle s of each recess 34 are equal to each other, and the distance A from the corner C to the center of each recess 34 and the distance B from the upper surface 27 to the upper end of the recess 34 are also mutual. Is set equal to. As a result, like the main flank 31, the recess 34 is also arranged rotationally symmetrically around the virtual central axis k 1 with a phase of 90 °. In addition, in FIGS. 1 to 5, reference numeral 35 is a chamfered surface formed to prevent chipping of the ridge portion intersecting the side surfaces 28.

【0011】 一方、図1、図2、図6〜図8に示すように、チップ取付溝22は、上述した 切刃チップ23の上面27と当接する底面26と、この底面26の一辺に沿って 形成されて工具本体21の軸線X(図2、図6)の方向を向く軸方向拘束面40 と、底面26の他の一辺に沿って形成されて工具本体21の径方向外周側を向く 径方向拘束面41とを有してなるもので、底面26は、切刃チップ23の上面2 7に正のアキシャルレーキ角を与えるべく工具本体21の軸線Xに対して所定の 傾斜角β傾けられている。また、軸方向拘束面40は、底面26に対して所定の 傾斜角γ傾けられ、この傾斜角γが切刃チップ23の側面28の逃げ角α(図5 参照)と一致せしめられることにより、当該軸方向拘束面40は底面26と密着 する切刃チップ23の側面28と密着可能とされている。さらに、径方向拘束面 41は、底面26及び軸方向拘束面40と直交する方向へ延びる平面に形成され ている。なお、図において符号42は底面26及び拘束面40、41の交差部に 形成された逃げである。On the other hand, as shown in FIG. 1, FIG. 2, and FIG. 6 to FIG. 8, the tip mounting groove 22 has a bottom surface 26 that comes into contact with the top surface 27 of the above-mentioned cutting edge tip 23, and one side of this bottom surface 26. Which is formed along the other side of the bottom surface 26 and faces the outer circumferential side of the tool body 21 in the radial direction. The bottom surface 26 has a radial constraining surface 41, and the bottom surface 26 is inclined at a predetermined inclination angle β with respect to the axis X of the tool main body 21 so as to give a positive axial rake angle to the upper surface 27 of the cutting edge tip 23. Has been. Further, the axial restraining surface 40 is inclined at a predetermined inclination angle γ with respect to the bottom surface 26, and this inclination angle γ is made to coincide with the clearance angle α (see FIG. 5) of the side surface 28 of the cutting edge tip 23. The axial restraining surface 40 can be brought into close contact with the side surface 28 of the cutting blade tip 23 that is in close contact with the bottom surface 26. Further, the radial constraining surface 41 is formed as a flat surface extending in a direction orthogonal to the bottom surface 26 and the axial constraining surface 40. In the figure, reference numeral 42 is a relief formed at the intersection of the bottom surface 26 and the restraining surfaces 40 and 41.

【0012】 そして、軸方向拘束面40の長手方向ほぼ中央位置には凸部43が形成されて いる。この凸部43は、底面26からの距離を増すにつれて軸方向拘束面40か ら次第に大きく突出する略三角柱状に形成され、その軸方向拘束面40に対する 傾斜角uは、切刃チップ23の凹部34の傾斜角sと同一又は傾斜角sよりも小 さい角度に設定されている。また、径方向拘束面41から凸部43の中央までの 距離fも切刃チップ23の角部Cから凹部34の中央までの距離A(図3)と等 しく定められている。さらに、凸部43の上端から底面26までの距離h及び凸 部43の幅jは切刃チップ23の上面27から凹部34の上端までの距離B(図 5参照)よりも小さく定められている。A convex portion 43 is formed at a substantially central position in the longitudinal direction of the axial constraining surface 40. The convex portion 43 is formed in a substantially triangular prism shape that gradually protrudes from the axial constraining surface 40 as the distance from the bottom surface 26 increases. The inclination angle s of 34 is the same as or smaller than the inclination angle s. Further, the distance f from the radial constraining surface 41 to the center of the convex portion 43 is also set equal to the distance A (FIG. 3) from the corner C of the cutting blade tip 23 to the center of the concave portion 34. Further, the distance h from the upper end of the convex portion 43 to the bottom surface 26 and the width j of the convex portion 43 are set to be smaller than the distance B from the upper surface 27 of the cutting blade tip 23 to the upper end of the concave portion 34 (see FIG. 5). ..

【0013】 しかして、以上のように構成された正面フライス20では、図1及び図2に示 すように、切刃チップ23がチップ取付溝22に挿入されて上面27が底面26 に当接せしめられ、かつ隣接する二つの側面28の主逃げ面30が軸方向拘束面 40及び径方向拘束面41にそれぞれ当接せしめられ、この状態で楔部材25が 工具本体21の径方向中心側へ締め付けられて切刃チップ23が底面26側へ押 圧されることにより、当該切刃チップ23が工具本体21に取り付けられる。こ れにより、一の角部Cを挟んで隣合う一対の主切刃30及び副切刃31がそれぞ れ工具本体21の外周面21b及び先端面21aから突出せしめられ、これら切 刃30、31が工具本体21とワーク(図示略)との間の相対運動に伴ってワー クに切り込まれて所望の切削加工が行われる。そして、一対の主切刃30及び副 切刃31の寿命が尽きた場合には、切刃チップ23が一旦取り外されて仮想中心 軸k1の回りに90゜ 回転せしめられた上で再度チップ取付溝22に装着され、 新たに工具本体21の外周面21b及び先端面21aから突出する主切刃30及 び副切刃31で切削が行われる。以下同様に切刃チップ23の着脱及び回転が繰 り返されてすべての主切刃30及び副切刃31が使用される。With the front milling cutter 20 configured as described above, however, as shown in FIGS. 1 and 2, the cutting edge tip 23 is inserted into the tip mounting groove 22 and the upper surface 27 contacts the bottom surface 26. The main flanks 30 of the two adjacent side surfaces 28 are brought into contact with the axial constraining surface 40 and the radial constraining surface 41, respectively. In this state, the wedge member 25 moves toward the center of the tool body 21 in the radial direction. The cutting blade tip 23 is attached to the tool main body 21 by being tightened and pressing the cutting blade tip 23 toward the bottom surface 26. As a result, a pair of the main cutting edge 30 and the sub cutting edge 31 which are adjacent to each other with one corner C interposed therebetween are made to project from the outer peripheral surface 21b and the tip end surface 21a of the tool body 21, respectively. 31 is cut into the work along with the relative movement between the tool body 21 and the work (not shown), and desired cutting is performed. Then, when the life of the pair of main cutting edge 30 and sub cutting edge 31 has expired, the cutting edge tip 23 is once removed and rotated 90 ° around the virtual center axis k 1 , and then the tip is reattached. Cutting is performed by the main cutting edge 30 and the sub cutting edge 31 that are mounted in the groove 22 and newly project from the outer peripheral surface 21b and the tip surface 21a of the tool body 21. Similarly, the removal and rotation of the cutting edge chip 23 are repeated in the same manner to use all the main cutting edges 30 and the sub cutting edges 31.

【0014】 以上の切削過程において、切刃チップ23の凹部34は軸方向拘束面40から 突出する凸部43と嵌合せしめられ、これにより工具本体21の径方向外周側へ の移動が拘束されて切刃チップ23の飛び出しが防止される。しかも、各凹部3 4は側面28と同じく仮想中心軸k1の回りに90゜ の位相をもって回転対称に 配置されているので、切削に関与する主切刃30及び副切刃31を変更するいわ ゆるコーナチェンジを行った場合でも、チップ取付溝22の軸方向拘束面40と 対向する側面28に同一形状の凹部34が割り出されることとなって凹部34と 凸部43との嵌合状態が繰り返し再現される。In the above cutting process, the concave portion 34 of the cutting edge tip 23 is fitted with the convex portion 43 projecting from the axial restraining surface 40, whereby the movement of the tool body 21 to the radially outer peripheral side is restrained. The cutting edge tip 23 is prevented from protruding. Moreover, since the respective concave portions 34 are arranged rotationally symmetrically around the virtual central axis k 1 with a phase of 90 ° like the side surface 28, the main cutting edge 30 and the sub cutting edge 31 involved in cutting are changed. Even when a gentle corner change is performed, the recess 34 having the same shape is indexed on the side surface 28 of the chip mounting groove 22 facing the axial restraining surface 40, so that the fitting state between the recess 34 and the projection 43 is determined. Repeatedly reproduced.

【0015】 しかも、本実施例では、凹部34が切刃チップ23の側面28に形成されてい るので、切刃チップ23の装着時には切刃チップ23を工具本体21の先端面2 1aの側からチップ取付溝22へ挿入し、底面26に沿って移動させることによ り凹部34と凸部43とを嵌合させることができる。反対に切刃チップ23の脱 着時には切刃チップ23を底面26に沿って工具本体21の先端側へ移動させる ことにより凹部34を凸部43から抜き取ることができる。そして、以上のよう に切刃チップ23を着脱する際の楔部材25の移動量は、切刃チップ23が底面 26に沿って移動できれば良いのであるから、切刃チップ23を適正量で押圧し た状態からクランプボルト24を幾らか緩める程度で十分であり、図9及び図1 0に示す従来例のように凸部の突出量を越える隙間が生じるまで楔部材25を移 動させる必要はない。従って、切刃チップ23の着脱作業を容易かつ迅速に行う ことができる。Moreover, in this embodiment, since the concave portion 34 is formed on the side surface 28 of the cutting blade tip 23, the cutting blade tip 23 is mounted from the side of the tip surface 21a of the tool body 21 when the cutting blade tip 23 is mounted. The concave portion 34 and the convex portion 43 can be fitted together by inserting them into the chip mounting groove 22 and moving them along the bottom surface 26. On the contrary, when the cutting blade tip 23 is attached and detached, the cutting blade tip 23 can be removed from the convex portion 43 by moving the cutting blade tip 23 along the bottom surface 26 to the tip side of the tool body 21. As described above, the amount of movement of the wedge member 25 when attaching and detaching the cutting blade tip 23 is sufficient if the cutting blade tip 23 can move along the bottom surface 26, so that the cutting blade tip 23 is pressed by an appropriate amount. It is sufficient to loosen the clamp bolt 24 to some extent from the above state, and it is not necessary to move the wedge member 25 until there is a gap exceeding the protrusion amount of the convex portion as in the conventional example shown in FIGS. 9 and 10. .. Therefore, the work of attaching and detaching the cutting edge tip 23 can be performed easily and quickly.

【0016】 加えて、凹部34が切刃チップ23の側面28に形成されているので、切刃チ ップ23の上下面27、29の中央部での肉厚の低下は生じない。従って、楔部 材25によるクランプ力を切刃チップ23の上下面27、29の中央部に十分に 作用させて当該切刃チップ23のずれを確実に防止することができる。さらに、 本実施例では凹部34よりも凸部43が幾らか小さく形成されることにより、こ れら凹部34と凸部43とを嵌合させた状態でも切刃チップ23が工具本体21 の径方向に幾らか遊動し得るようになっているため、工具本体21の外周へ突出 する主切刃30の振れ調整が可能である。In addition, since the concave portion 34 is formed on the side surface 28 of the cutting edge tip 23, the thickness of the upper and lower surfaces 27, 29 of the cutting edge chip 23 is not reduced in the central portion. Therefore, the clamping force of the wedge member 25 sufficiently acts on the central portions of the upper and lower surfaces 27, 29 of the cutting blade tip 23, and the displacement of the cutting blade tip 23 can be reliably prevented. Further, in the present embodiment, the convex portion 43 is formed to be slightly smaller than the concave portion 34, so that even when the concave portion 34 and the convex portion 43 are fitted to each other, the cutting edge tip 23 has a diameter larger than that of the tool body 21. Since the main cutting edge 30 projecting to the outer periphery of the tool body 21 can be adjusted in deflection, it is possible to adjust the deflection of the main cutting edge 30.

【0017】 なお、本実施例では切刃チップ23に凹部34を、チップ取付溝22の軸方向 拘束面40に凸部43を形成しているが、これらを逆に配置してもよいことはも ちろんである。この場合には、切刃チップ23が切り欠かれないので切刃チップ 23の剛性低下が中央部のみならず周縁でも生じないという効果がある。また、 切刃チップは必ずしも回転対称である必要はなく、非対称形状であってもチップ 取付溝の軸方向拘束面と、この拘束面に当接する切刃チップの側面との間に凹部 及び凸部が形成されていさえすれば良い。さらに、本願考案が適用される切削工 具としては実施例で示した正面フライスに限らず、その他エンドミルなど切刃チ ップの飛び出し防止を必要とするあらゆる切削工具に適用される。Although the concave portion 34 is formed in the cutting edge tip 23 and the convex portion 43 is formed in the axial restraining surface 40 of the tip mounting groove 22 in this embodiment, these may be arranged in reverse. It is mixed. In this case, since the cutting blade tip 23 is not cut out, there is an effect that the rigidity of the cutting blade tip 23 does not decrease not only in the central portion but also in the peripheral portion. Further, the cutting edge tip does not necessarily have to be rotationally symmetric, and even if the cutting edge tip has an asymmetrical shape, a concave portion and a convex portion are formed between the axial constraining surface of the tip mounting groove and the side surface of the cutting edge tip that abuts on this constraining surface. Only needs to be formed. Furthermore, the cutting tool to which the present invention is applied is not limited to the face milling cutter shown in the embodiment, but may be applied to any cutting tool such as an end mill that needs to prevent the cutting edge chip from popping out.

【0018】[0018]

【考案の効果】[Effect of the device]

以上説明したように、この考案によれば、切刃チップの側面とチップ取付溝の 軸方向拘束面とに形成された凹部と凸部とが嵌合することによって工具本体の略 径方向における切刃チップの飛び出しが防止される。そして、切刃チップをチッ プ取付溝の底面に沿う方向へ移動させるだけで凹部と凸部とを着脱できるので、 切刃チップをチップ取付溝の底面と交差する方向へ凸部の突出量以上移動させる 必要がなくなって切刃チップの着脱が容易かつ迅速になされることとなり、さら には、切刃チップの側面に凹部または凸部が形成されるので、切刃チップの上下 面中央部での肉厚の低下は生じず、強度のクランプ力を切刃チップの中央部に作 用させて確実に拘束できる。 As described above, according to the present invention, the concave portion and the convex portion formed on the side surface of the cutting edge tip and the axial restraining surface of the tip mounting groove are fitted to each other, thereby cutting the tool body in the substantially radial direction. Prevents the blade tip from popping out. The recess and protrusion can be attached and removed simply by moving the cutting edge tip in the direction along the bottom surface of the chip mounting groove. Since there is no need to move it, the cutting blade tip can be easily and quickly attached and detached.Furthermore, since a concave portion or a convex portion is formed on the side surface of the cutting blade tip, it is possible to remove it at the center of the upper and lower surfaces of the cutting blade tip. The thickness of the cutting edge does not decrease, and a strong clamping force can be applied to the central part of the cutting edge tip to securely restrain it.

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

【図1】本考案の一実施例において切刃チップを工具本
体のチップ取付溝に取り付けた状態を切刃チップの上面
と対向する方向から示した図である。
FIG. 1 is a view showing a state in which a cutting blade tip is attached to a tip mounting groove of a tool body in an embodiment of the present invention, as viewed from a direction facing an upper surface of the cutting blade tip.

【図2】図1のII方向からの矢視図である。FIG. 2 is a view from the direction of the arrow II in FIG.

【図3】図1に示す切刃チップの平面図である。3 is a plan view of the cutting edge tip shown in FIG. 1. FIG.

【図4】図3のチップの斜視図である。FIG. 4 is a perspective view of the chip of FIG.

【図5】図3のV方向からの矢視図である。5 is a view from the direction V in FIG.

【図6】本実施例におけるチップ取付溝から切刃チップ
を取り外した状態を図2と同一方向から示した図であ
る。
FIG. 6 is a view showing a state in which a cutting edge tip is removed from a tip mounting groove in the present embodiment, viewed from the same direction as FIG.

【図7】図6のVII−VII線における断面図である。7 is a sectional view taken along line VII-VII in FIG.

【図8】図6のVIII−VIII線における断面図である。8 is a cross-sectional view taken along the line VIII-VIII in FIG.

【図9】従来の正面フライスの外周部の一例を示す図で
ある。
FIG. 9 is a diagram showing an example of an outer peripheral portion of a conventional face milling cutter.

【図10】図9に示す正面フライスの切刃チップ周囲の
構成を示す断面図である。
10 is a cross-sectional view showing a configuration around a cutting edge tip of the front milling cutter shown in FIG.

【符号の説明】[Explanation of symbols]

20 正面フライス 21 工具本体 22 チップ取付溝 23 切刃チップ 26 チップ取付溝の底面 27 切刃チップの上面 28 切刃チップの側面 29 切刃チップの下面 34 凹部 40 チップ取付溝の軸方向拘束面 43 凸部 k1 仮想中心軸20 Face Milling 21 Tool Body 22 Tip Mounting Groove 23 Cutting Edge Tip 26 Bottom of Tip Mounting Groove 27 Upper Edge of Cutting Edge 28 Side of Cutting Edge Tip 29 Lower Side of Cutting Edge Tip 34 Recess 40 Axial Restraint Surface of Tip Mounting Groove 43 Convex part k 1 Virtual central axis

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 チップ取付溝を有する略円盤状の工具本
体と、互いに反対方向を向く一対の上下面と該上下面の
周囲に配置される側面とを有する平板状の切刃チップと
を具備してなり、 上記チップ取付溝は、上記工具本体の略周方向を向く底
面と、この底面の一辺に沿って形成されて上記工具本体
の略軸線方向を向く軸方向拘束面とを有してなり、 上記切刃チップは、その上下面のいずれか一方を上記チ
ップ取付溝の上記底面に当接させ、かつ一の側面を上記
チップ取付溝の軸方向拘束面に当接させた状態で上記工
具本体に取り付けられてなる切削工具において、 上記軸方向拘束面と、該軸方向拘束面と当接する切刃チ
ップの側面とのいずれか一方に上記軸方向拘束面と交差
する方向へ伸びる凸部を形成し、他方に上記凸部と嵌合
可能な凹部を形成したことを特徴とする切削工具。
1. A flat disk-shaped cutting blade tip having a substantially disk-shaped tool body having a tip mounting groove, a pair of upper and lower surfaces facing in opposite directions, and side surfaces arranged around the upper and lower surfaces. The tip mounting groove has a bottom surface that faces substantially the circumferential direction of the tool body, and an axial restraint surface that is formed along one side of the bottom surface and that faces the substantially axial direction of the tool body. In the cutting edge chip, one of the upper and lower surfaces thereof is brought into contact with the bottom surface of the chip mounting groove, and one side surface thereof is brought into contact with the axial restraining surface of the chip mounting groove. In a cutting tool attached to a tool body, a convex portion extending in a direction intersecting with the axial constraining surface on either one of the axial constraining surface and a side surface of a cutting edge tip that is in contact with the axial constraining surface. And a concave part that can be fitted to the convex part on the other side A cutting tool characterized by having formed.
【請求項2】 上記切刃チップの上記上下面が、これら
上下面と交差する一の仮想中心軸との交点に関して点対
称をなす多角形状に形成されるとともに、該切刃チップ
の上記側面が、上記仮想中心軸に対して回転対称に配置
されてなり、これら側面に、上記凹部が上記仮想中心軸
に対して回転対称をなすように形成される一方で、上記
工具本体の上記軸方向拘束面に該凹部と嵌合する凸部が
形成されていることを特徴とする請求項1記載の切削工
具。
2. The upper and lower surfaces of the cutting blade tip are formed in a polygonal shape which is point-symmetric with respect to an intersection with one virtual central axis intersecting the upper and lower surfaces, and the side surface of the cutting blade tip is formed. , Are arranged symmetrically with respect to the virtual center axis, and the recesses are formed on these side surfaces so as to be rotationally symmetrical with respect to the virtual center axis, while the axial restraint of the tool body The cutting tool according to claim 1, wherein a convex portion that fits into the concave portion is formed on the surface.
【請求項3】 上記切刃チップの上記上下面が、これら
上下面と交差する一の仮想中心軸との交点に関して点対
称をなす多角形状に形成されるとともに、該切刃チップ
の上記側面が、上記仮想中心軸に対して回転対称に配置
されてなり、これら側面に、上記凸部が上記仮想中心軸
に対して回転対称をなすように形成される一方で、上記
工具本体の上記軸方向拘束面に該凸部と嵌合する凹部が
形成されていることを特徴とする請求項1記載の切削工
具。
3. The upper and lower surfaces of the cutting blade tip are formed in a polygonal shape that is point-symmetric with respect to an intersection with one virtual center axis intersecting the upper and lower surfaces, and the side surface of the cutting blade tip is formed. , Are arranged in rotational symmetry with respect to the virtual central axis, and the convex portions are formed on these side surfaces so as to be rotationally symmetrical with respect to the virtual central axis, while the axial direction of the tool main body. The cutting tool according to claim 1, wherein a recess that fits the protrusion is formed on the restraining surface.
JP1991091293U 1991-11-07 1991-11-07 Cutting tools Expired - Fee Related JP2539892Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1991091293U JP2539892Y2 (en) 1991-11-07 1991-11-07 Cutting tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1991091293U JP2539892Y2 (en) 1991-11-07 1991-11-07 Cutting tools

Publications (2)

Publication Number Publication Date
JPH0585512U true JPH0585512U (en) 1993-11-19
JP2539892Y2 JP2539892Y2 (en) 1997-07-02

Family

ID=14022425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1991091293U Expired - Fee Related JP2539892Y2 (en) 1991-11-07 1991-11-07 Cutting tools

Country Status (1)

Country Link
JP (1) JP2539892Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513471A (en) * 1974-06-28 1976-01-12 Mitsubishi Metal Corp Surooaueishikisetsusakukogu
JPS6269045A (en) * 1985-09-20 1987-03-30 Matsushita Electric Ind Co Ltd Smoke discharge device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513471A (en) * 1974-06-28 1976-01-12 Mitsubishi Metal Corp Surooaueishikisetsusakukogu
JPS6269045A (en) * 1985-09-20 1987-03-30 Matsushita Electric Ind Co Ltd Smoke discharge device

Also Published As

Publication number Publication date
JP2539892Y2 (en) 1997-07-02

Similar Documents

Publication Publication Date Title
KR100767091B1 (en) Cutting insert and corresponding milling cutter
JP2529499B2 (en) Cutting insert
US4632607A (en) Indexable cutting insert
JPH09216113A (en) Throw-away tip and cutting tool
JP3472752B2 (en) Indexable tip and pin mirror cutter using the same
JP3222515B2 (en) Hole cutter
JP3329159B2 (en) Indexable inserts and indexable milling tools
JP3269245B2 (en) Indexable inserts and cutting tools
JPH11347826A (en) Throwaway tip
US20030039519A1 (en) Milling tool and cutting bit therefor
JPH1119817A (en) Throwaway type scallop cutter
JPH0585512U (en) Cutting tools
US4712949A (en) On-edge end-milling insert
JP3118956B2 (en) Indexable tip
JPH0839329A (en) Throwaway tip
JP3303184B2 (en) Indexable milling tools
JP2577362B2 (en) Slow-away staggered blade milling tool
JPH11254207A (en) Throwaway tip and throwaway type cutting tool
JP2841974B2 (en) Cutting tools
JP3279194B2 (en) Indexable inserts and indexable milling tools
JP2601943Y2 (en) Indexable inserts for back grinding
JPH0647613Y2 (en) Throw-away type end mill
JP2524099Y2 (en) Indexable side cutter
JP2755678B2 (en) Cutting tools
JP2503696Y2 (en) Throw-away tip for parting and grooving

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19970218

LAPS Cancellation because of no payment of annual fees