JP2539892Y2 - Cutting tools - Google Patents
Cutting toolsInfo
- Publication number
- JP2539892Y2 JP2539892Y2 JP1991091293U JP9129391U JP2539892Y2 JP 2539892 Y2 JP2539892 Y2 JP 2539892Y2 JP 1991091293 U JP1991091293 U JP 1991091293U JP 9129391 U JP9129391 U JP 9129391U JP 2539892 Y2 JP2539892 Y2 JP 2539892Y2
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- cutting
- tip
- lower surfaces
- tool body
- 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.)
- Expired - Fee Related
Links
Landscapes
- Milling Processes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool such as a face mill, and more particularly to a cutting tool suitable for cutting a soft material such as an aluminum alloy.
【０００２】[0002]
【従来の技術】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１
０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。2. Description of the Related Art In cutting a soft material such as an aluminum alloy, a much higher cutting speed than that of a normal steel material is required in order to realize good machining accuracy and high productivity. For this reason, the number of revolutions of the cutting tool used for machining is also set to a high-speed range from several thousand rpm, sometimes exceeding 10,000 rpm. By the way, when the cutting tool is rotated in such a high-speed region, a strong centrifugal force acts on the cutting edge tip in a throw-away type cutting tool in which the cutting edge tip is pressed by a wedge member, whereby the cutting edge tip is May jump out of the chip mounting groove of the tool body to the outside. Therefore, as a cutting tool for reliably preventing the cutting edge tip from popping out, for example, a face milling machine 1 as shown in FIGS. 9 and 10 has been provided (Japanese Utility Model Laid-Open No. 62-68712). That is, the illustrated face mill 1 has a cutting blade tip 4 inserted into the tip mounting groove 3 of the tool body 2 pressed down in a circumferential direction of the tool body 2 by a wedge member 6 tightened by a clamp bolt 5. And the bottom surface 3a facing the circumferential direction of the chip mounting groove 3.
When the pin 7 is driven into and the tip of the pin protrudes, a convex portion 8 is formed on the bottom surface 3a, while the convex portion 8 is formed on the lower surface 9 of the cutting edge chip 4 which contacts the bottom surface 3a.
A concave portion 10 is formed to fit with the convex portion 8 and the concave portion 1.
The cutting edge tip 4 is pressed down by the wedge member 6 in a state where 0 is fitted, thereby preventing the cutting edge tip 4 from protruding to the outer peripheral side of the tool.
【０００３】[0003]
【考案が解決しようとする課題】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 conventional face mill 1 described above has an almost sufficient effect with respect to preventing the cutting edge tip 4 from popping out, the workability when attaching and detaching the cutting edge tip 4 is low. Unfortunately, there was still room for improvement in this regard. That is, in the front milling machine 1 shown in FIGS. 9 and 10, since the protrusion 8 protrudes from the bottom surface 3 a of the chip mounting groove 3, the wedge member is required to attach and detach the cutting edge chip 4 to and from the chip mounting groove 3. It is necessary to leave a gap between the side surface 6a of the base 6 and the bottom surface 3a of the tip mounting groove 3 in excess of the sum of the thickness of the cutting tip 4 and the amount of protrusion of the projection 8. However, since the angle of inclination of the side surface 6a of the wedge member 6 with respect to the bottom surface 3a is minute, the clamp bolt 5 is rotated a considerable number of times to make a gap until the cutting edge tip 4 can be detached. This operation must be largely moved in the insertion direction, and if this operation is performed for all the cutting edge chips 4, the operation time will be significantly increased. Further, in the conventional face milling machine 1 described above, since the concave portion 10 is formed substantially at the center of the lower surface 9 of the cutting edge chip 4, the thickness at the central portion of the cutting edge chip 4 is reduced, and the rigidity is reduced. For this reason, the clamping force of the wedge member 6 acting substantially at the center of the cutting edge tip 4 has to be reduced, and the position of the cutting edge tip 4 may shift during cutting. The present invention has been made under such a background, and makes it easy and quick to attach / detach a cutting edge tip while preventing the cutting edge tip from jumping out. It is an object of the present invention to provide a cutting tool that can act on a central portion of a cutting tool.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
の本考案は、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
および上記上下面と交差する方向へ延びる凸部を形成
し、他方に上記凸部と嵌合可能な凹部を形成したことを
特徴とするものである。[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The present invention comprises a substantially disc-shaped tool body having a tip mounting groove, a flat cutting edge tip having 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 oriented substantially in the circumferential direction of the tool body, and an axial restraint surface formed along one side of the bottom surface and oriented substantially in the axial direction of the tool body. The cutting blade tip has one of its upper and lower surfaces abutted against the bottom surface of the tip mounting groove, and one side surface abuts on the axial restraint surface of the chip mounting groove. cutting tool odor consisting attached to the tool body
Te, and the axial restraining surface, to one of the side surfaces of the cutting inserts abut with said axial restraint surface, the axial restraining surface
And a direction crossing the upper and lower surfaces form an extended building protrusion, and is characterized in that the other in the formation of the projecting portion and fittable recesses.
【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 the upper and lower surfaces, and the side surfaces are rotated with respect to the virtual center axis. In the case of a cutting edge tip arranged symmetrically, the cutting edge tip is formed by forming the concave portion or the convex portion on the side surface of the cutting edge tip so as to be rotationally symmetric with respect to the virtual center axis. Can be maintained.
【０００６】[0006]
【作用】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 construction, the fitting of the concave portion and the convex portion prevents the cutting edge tip from jumping out in a substantially radial direction of the tool body. And since the fitting direction of these concave portions and convex portions is set to the direction intersecting with the axial restraining surface of the chip mounting groove, when attaching and detaching the cutting edge chip, the cutting edge chip is attached to the bottom surface of the chip mounting groove. The protrusion can be attached to and detached from the recess simply by moving the protrusion in the direction along. Therefore, it is not necessary to move the cutting edge tip in the direction intersecting with the bottom surface of the tip mounting groove by the amount of protrusion of the protrusion, and therefore, even when the cutting edge tip is pressed against the bottom surface of the tip mounting groove by a wedge member or the like. The chip can be easily attached and detached. Further, even when a concave portion is formed in the cutting edge tip, since the concave portion is formed on the side surface of the cutting edge tip, the thickness does not decrease at the center of the upper and lower surfaces of the cutting edge chip. There is no problem with applying force. Further, when the convex portion is formed on the side surface of the cutting edge tip, the thickness of the cutting edge tip does not decrease, so that it is more effective to prevent the reduction of the chip rigidity.
【０００７】[0007]
【実施例】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。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, in the face milling machine 20 of the present embodiment, a distal end surface 21 a of the tool main body 21 is provided on an outer peripheral portion of the tool main body 21 having a substantially disk-shaped appearance.
A chip mounting groove 22 is formed on the outer peripheral surface 21b, and a cutting edge chip 23 is inserted into the chip mounting groove 22. The cutting edge chip 23 is attached to the chip mounting groove 22 by a wedge member 25 which is fastened by a clamp bolt 24. Is pressed against the bottom surface 26 facing in the circumferential direction.
【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１１゜ ）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３０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 in FIGS. 3 to 5, the cutting edge tip 23 is formed by forming a hard material such as a cemented carbide or ceramic into a polygonal flat plate, and has a rake face. Parallel to the upper surface 27, the upper surface 27, a side surface 28 inclined at a predetermined regular angle α (for example, 11 °) with respect to a direction orthogonal to the upper surface 27 and serving as a flank of the cutting edge tip 23, and A main cutting edge 30 and a sub cutting edge 31 that have a lower surface 29 and intersect at a predetermined apex angle θ across a corner C of the upper surface 27 at an intersection ridge line between the upper surface 27 and the side surface 28. Are formed in pairs, each corresponding to the number of. The upper surface 27 and the lower surface 29 are formed in a polygonal shape that is point-symmetric with respect to an intersection P with one virtual center axis k 1 orthogonal to the upper and lower surfaces 27, 29, and thereby the main surface formed on each side of the upper surface 27. The cutting edges 30 are positioned such that their lengths are equal and their extension lines intersect at 90 °.
The lengths of the sub cutting edges 31 are also 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２
８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２
３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。[0009] The side surface 28 includes a main flank 32 connecting to the main cutting edge 30, made of and a secondary clearance surface 33 continuous with the minor cutting edge 31, 90 ° with respect to the virtual central axis k 1 Are arranged rotationally symmetrically with a phase of That is, side 2
8, the clearance angles α are all set to be equal, and the length ratio between the main flank 32 and the sub flank 33 is set to be constant, all of which have the same shape.
In each arrangement, the cutting edge tip 23 is moved to the virtual center axis k 1.
The cutting edge tip 2 when rotated by 90 °
3 are positioned such that a side surface 28 of the same shape is repeatedly indexed on one side.
【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３
４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。[0010] Each side surface 28 is formed with a concave portion 34 depressed from the side surface 28. These recesses 3
4 is gradually depressed from the main flank 32 toward the lower surface 29, with the upper end positioned at a predetermined distance from the main cutting edge 30 toward the lower surface 29, and each lower end is opened to the lower surface 29. 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. Then, the width w and the inclination angle s of each recess 34 are determined to be equal to each other,
Further, a distance A from the corner C to the center of each concave portion 34 and a distance B from the upper surface 27 to the upper end of the concave portion 34 are set to be equal to each other. As a result, the concave portion 34 also becomes the main flank 31
Similarly to the above, they are arranged rotationally symmetrically around the virtual central axis k 1 with a phase of 90 °. In FIG. 1 to FIG. 5, reference numeral 35 denotes a chamfer surface formed so as to prevent chipping of the intersection ridge portion between 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２７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２
６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 FIGS. 1 and 2 and FIGS. 6 to 8, the tip mounting groove 22 has a bottom surface 26 in contact with the upper surface 27 of the cutting blade tip 23 and a side along the bottom surface 26. An axial restraining surface 40 formed along the axis X (FIGS. 2 and 6) of the tool body 21 and another side of the bottom surface 26 and facing the radially outer side of the tool body 21. The bottom surface 26 has 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.
Is tilted. Also, the axial restraint surface 40 is
Is inclined at a predetermined inclination angle γ, and the inclination angle γ is made to coincide with the clearance angle α of the side surface 28 of the cutting edge tip 23 (see FIG. 5), so that the axial restraint surface 40 is
6 can be in close contact with the side surface 28 of the cutting tip 23. Further, the radial restraint surface 41 is formed as a plane extending in a direction orthogonal to the bottom surface 26 and the axial restraint surface 40. In the drawing, reference numeral 42 denotes a relief formed at the intersection of the bottom surface 26 and the constraint 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４
０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２
３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２
７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 projection 43 is formed substantially at the center of the axial restraint surface 40 in the longitudinal direction. This convex part 43
The axial restraining surface 4 increases as the distance from the bottom surface 26 increases.
0, and is formed in a substantially triangular prism shape that protrudes greatly from 0.
The angle is set to be the same as or smaller than the inclination angle s of the third concave portion 34. Further, the distance f from the radial restraint surface 41 to the center of the convex portion 43 is also determined by the corner C of the cutting edge tip 23.
Is set to be equal to the distance A (FIG. 3) from the center of the concave portion 34 to the center. Further, the distance h from the upper end of the protrusion 43 to the bottom surface 26 and the width j of the protrusion 43 are determined by the upper surface 2 of the cutting edge tip 23.
7 is smaller than the distance B (see FIG. 5) from the upper end of the concave portion 34.
【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。In the face mill 20 constructed as described above, 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 is brought into contact with the bottom surface 26. The main flank 30 of two adjacent side surfaces 28 is formed by an axial restraint surface 40 and a radial restraint surface 41.
In this state, the wedge member 25 is tightened toward the center of the tool body 21 in the radial direction, and the cutting edge tip 23 is pressed toward the bottom surface 26, so that the cutting edge tip 23 is brought into contact with the tool body 21. Attached to. As a result, a pair of the main cutting edge 30 and the sub cutting edge 31 adjacent to each other with one corner C interposed therebetween are projected from the outer peripheral surface 21b and the distal end surface 21a of the tool body 21, respectively.
Is cut into the work with the relative movement between the tool body 21 and the work (not shown), and desired cutting is performed. 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, rotated 90 ° around the virtual center axis k 1 , and then mounted again. The cutting is performed by the main cutting edge 30 and the sub cutting edge 31 which are mounted in the groove 22 and newly protrude from the outer peripheral surface 21b and the front end surface 21a of the tool main body 21. Thereafter, the attachment and detachment and rotation of the cutting blade tip 23 are repeated in the same manner, and all the main cutting blades 30 are removed.
And the secondary cutting edge 31 is used.
【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３４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 cutting tip 23
The concave portion 34 is fitted with a convex portion 43 protruding from the axial direction restricting surface 40, whereby the movement of the tool body 21 to the radially outer peripheral side is restricted, and the cutting edge tip 23 is prevented from jumping out. Moreover, since the recesses 34 are arranged rotationally symmetrically about the imaginary central axis k 1 with a phase of 90 ° around the imaginary central axis k 1 , the so-called corners for changing the main cutting edge 30 and the sub cutting edge 31 involved in cutting are provided. Even when a change is made, the concave portion 34 of the same shape is indexed on the side surface 28 of the chip mounting groove 22 facing the axial restraint surface 40, and the fitting state of the concave portion 34 and the convex portion 43 is repeatedly reproduced. Is done.
【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２１ａ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１０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。Further, in this embodiment, since the concave portion 34 is formed on the side surface 28 of the cutting edge tip 23, when the cutting edge tip 23 is mounted, the cutting edge tip 23 is inserted from the tip end face 21a of the tool body 21. Inserted into the mounting groove 22 and the bottom surface 26
The concave portion 34 and the convex portion 43 can be fitted by moving the concave portion 34 along the vertical axis. Conversely, when the cutting tip 23 is detached, the cutting tip 23 is moved along the bottom surface 26 along the tool body 21.
The concave portion 34 can be extracted from the convex portion 43 by moving the concave portion 34 toward the front end side. Then, as described above, the amount of movement of the wedge member 25 when attaching and detaching the cutting edge tip 23 is only required to be able to move along the bottom surface 26, so the cutting edge tip 23 is pressed with an appropriate amount. It is enough to loosen the clamp bolt 24 somewhat from the state shown in FIG.
In addition, it is not necessary to move the wedge member 25 until a gap exceeding the amount of protrusion of the convex portion is generated unlike the conventional example shown in FIG.
Therefore, the work of attaching and detaching the cutting blade 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２
７、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２
１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 recess 34 is formed in the side surface 28 of the cutting tip 23, the upper and lower surfaces 2 of the cutting tip 23 are formed.
No reduction in wall thickness occurs at the center of 7, 29. Therefore,
The clamping force of the wedge member 25 is sufficiently applied to the central portions of the upper and lower surfaces 27 and 29 of the cutting edge tip 23, so that the displacement of the cutting edge tip 23 can be reliably prevented. Further, in the present embodiment, the convex portion 43 is formed to be somewhat smaller than the concave portion 34, so that even when the concave portion 34 and the convex portion 43 are fitted, the cutting blade tip 23 can move in the radial direction of the tool body 21. The tool body 2
The run-out adjustment of the main cutting edge 30 protruding to the outer periphery of the first cutting edge 30 is possible.
【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４
３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。そし
て、上記実施例では、切刃チップはその上面をチップ取
付溝の底面に当接させた状態で工具本体に取り付けられ
ているが、これに限らず、本考案を、図１０に示した従
来例と同様な、切刃チップをその下面がチップ取付溝の
底面に当接するように工具本体に取り付けてなる切削工
具に適用してもよい。 In this embodiment, the concave portion 34 is formed in the cutting edge tip 23 and the convex portion 4 is formed in the axial restraining surface 40 of the chip mounting groove 22.
Although 3 is formed, it is a matter of course that these may be arranged in reverse. In this case, there is an effect that the rigidity of the cutting edge chip 23 does not occur not only in the center portion but also in the peripheral edge because the cutting edge tip 23 is not cut out. Further, the cutting edge tip does not necessarily have to be rotationally symmetric, and even if it is asymmetrical, a concave portion and a convex portion are formed between the axially constraining surface of the chip mounting groove and the side surface of the cutting edge tip abutting this constraining surface. It only needs to be formed. Further, the cutting tool to which the present invention is applied is not limited to the face mill shown in the embodiment, but may be applied to any other cutting tool such as an end mill which needs to prevent the cutting edge tip from popping out. Soshi
Therefore, in the above embodiment, the cutting edge tip is
Attached to the tool body with the bottom of the
However, the present invention is not limited to this.
As in the previous example, the cutting edge tip is
Cutting machine attached to the tool body so as to contact the bottom
It may be applied to tools.
【００１８】[0018]
【考案の効果】本考案は、以上説明したとおりに構成さ
れているので、以下に記載するような効果を奏する。 請
求項１に記載の考案は、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
とになり、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、高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。請求項２に記載
の考案は、上記効果の他、一対の主切刃及び副切刃の寿
命が尽きた場合には、一旦、切刃チップを工具本体から
取り外して仮想中心軸回りに回転せしめて新たな主切刃
及び副切刃で切削を行うことができ、すなわち、切削に
関与する主切刃及び副切刃を変更するいわゆるコーナチ
ェンジを行うことができる。 請求項３に記載の考案は、
上記効果の他、切刃チップ側に凸部を形成する、すなわ
ち、切刃チップが切り欠かれないので、切刃チップの剛
性低下が中央部のみならず周縁でも生じない。 [Effect of the Invention] The present invention is configured as described above.
Therefore, the following effects can be obtained. Contract
The invention according to claim 1 is that the concave and convex portions formed on the side surface of the cutting edge tip and the axial restraint surface of the chip mounting groove are fitted to each other, so that the cutting edge tip substantially in the radial direction of the tool body is fitted. Jumping out is prevented. The concave and convex portions can be attached and detached simply by moving the cutting edge tip in the direction along the bottom surface of the chip mounting groove, so that the cutting edge tip moves in the direction intersecting the bottom surface of the chip mounting groove by more than the protrusion amount of the convex portion. There is no need to make it possible to easily and quickly attach and detach the cutting tip, and furthermore, since a concave portion or a convex portion is formed on the side surface of the cutting tip, the upper and lower center portions of the upper and lower surfaces of the cutting tip are The wall thickness does not decrease, and a high- strength clamping force can be applied to the central portion of the cutting edge tip to reliably restrain it. Claim 2
In addition to the above effects, the invention of
If the life is exhausted, once remove the cutting edge tip from the tool body
Remove and rotate around the virtual center axis to create a new main cutting edge
And cutting with the secondary cutting edge, that is,
The so-called corner that changes the main and secondary cutting edges involved
You can make a change. The invention according to claim 3 is:
In addition to the above effects, a convex portion is formed on the cutting edge tip side, that is,
Since the cutting edge tip is not cut off,
No deterioration in the properties occurs not only at the center but also at the periphery.
【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 diagram showing a state in which a cutting edge tip is attached to a tip attachment groove of a tool body in a direction facing an upper surface of the cutting edge tip in one embodiment of the present invention.
【図２】図１のII方向からの矢視図である。FIG. 2 is a view as seen from an arrow II in FIG. 1;
【図３】図１に示す切刃チップの平面図である。FIG. 3 is a plan view of the cutting edge tip shown in FIG. 1;
【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. 3;
【図５】図３のＶ方向からの矢視図である。FIG. 5 is a view as seen from a direction V in FIG. 3;
【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 diagram showing a state in which the cutting edge tip is removed from the tip mounting groove in the present embodiment from the same direction as FIG. 2;
【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 sectional view taken along 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 view showing an example of an outer peripheral portion of a conventional face milling machine.
【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。FIG. 10 is a sectional view showing a configuration around a cutting edge tip of the face milling machine shown in FIG. 9;
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Reference Signs List 20 front milling tool 21 tool body 22 chip mounting groove 23 cutting blade tip 26 bottom surface of chip mounting groove 27 upper surface of cutting blade chip 28 side surface of cutting blade chip 29 lower surface of cutting blade chip 34 concave portion 40 axial restraining surface of chip mounting groove 43 protrusions k 1 virtual center axis
───────────────────────────────────────────────────── フロントページの続き (72)考案者 林崎 弘章 茨城県結城郡石下町大字古間木1511番地 三菱マテリアル株式会社 筑波製作所 内 (56)参考文献 特開 昭51−3471（ＪＰ，Ａ) 実開 昭63−179015（ＪＰ，Ｕ) ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroaki Hayashizaki 1511 Furamagi, Ishishita-cho, Yuki-gun, Ibaraki Pref. Mitsubishi Materials Corporation Tsukuba Plant (56) References 63-179015 (JP, U)
Claims (3)
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、上記軸方向拘束面およ
び上記上下面と交差する方向へ延びる凸部を形成し、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 substantially disk-shaped tool body having a chip mounting groove, and a flat cutting edge chip having a pair of upper and lower surfaces facing in opposite directions and side surfaces disposed around the upper and lower surfaces. The chip mounting groove has a bottom surface oriented substantially in the circumferential direction of the tool body, and an axial restraint surface formed along one side of the bottom surface and oriented substantially in the axial direction of the tool body. The cutting edge tip has one of the upper and lower surfaces brought into contact with the bottom surface of the tip mounting groove, and one side surface is brought into contact with the axial restraint surface of the tip mounting groove. in the cutting tool comprising attached to the tool body, and the axial restraining surface, to one of the side surfaces of the cutting inserts abut with said axial restraint surface, Oyo the axial restraining surface
Cutting tool, characterized in that finely the upper and lower surfaces in a direction intersecting to form an extended building protrusion, the other to the formation of the projecting portion and fittable recesses.
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 cutting tool according to claim 1, wherein the upper and lower surfaces of the cutting edge 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. The concave portions are formed on these side surfaces so as to be rotationally symmetric with respect to the virtual central axis, while the axial restraint of the tool body is performed. The cutting tool according to claim 1, wherein a convex portion that fits with the concave portion is formed on the surface.
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 edge 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 edge tip is Are arranged so as to be rotationally symmetrical with respect to the virtual center axis, and on these side surfaces, the protrusions are formed so as to be rotationally symmetrical with respect to the virtual center axis, while the axial direction of the tool body is The cutting tool according to claim 1, wherein a concave portion that fits with the convex portion is formed on the constraint surface.
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 JPH0585512U (en) | 1993-11-19 |
| JP2539892Y2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11090740B2 (en) * | 2019-02-12 | 2021-08-17 | Iscar, Ltd. | Rotary cutting body having insert pocket with seat surface provided with a plurality of abutment elements and rotary cutting tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513471A (en) * | 1974-06-28 | 1976-01-12 | Mitsubishi Metal Corp | SUROOAUEISHIKISET SUSAKUKOGU |
| JPS6269045A (en) * | 1985-09-20 | 1987-03-30 | Matsushita Electric Ind Co Ltd | Smoke discharge device |
-
1991
- 1991-11-07 JP JP1991091293U patent/JP2539892Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0585512U (en) | 1993-11-19 |
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| 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 |
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| LAPS | Cancellation because of no payment of annual fees |