JPH0731218U - Drilling tool with indexable insert - Google Patents
Drilling tool with indexable insertInfo
- Publication number
- JPH0731218U JPH0731218U JP6214693U JP6214693U JPH0731218U JP H0731218 U JPH0731218 U JP H0731218U JP 6214693 U JP6214693 U JP 6214693U JP 6214693 U JP6214693 U JP 6214693U JP H0731218 U JPH0731218 U JP H0731218U
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- JP
- Japan
- Prior art keywords
- tip
- tool body
- drill
- cutting fluid
- center
- 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.)
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Abstract
(57)【要約】
【目的】 工具本体１の強度を低下させずに、センター
ドリル５、このドリル５による工作物の切削加工部に切
削液を多量に効率よく供給できる、スローアウェイチッ
プ付き孔あけ工具を提供する。
【構成】 工具本体１の先端中心部にセンタードリル５
を設け、工具本体１の周方向の２箇所に設けたチップポ
ケット４ａの後側先端部にスローアウェイチップ７をそ
れぞれ固定し、工具本体１を軸方向に貫通する２本の切
削液通路孔９をセンタードリル５の両側に設け、前記通
路孔９を末端の供給口９ａから先端の吐出口９ｂに向け
て次第に小径に形成すると共に、吐出口９ｂを前記ドリ
ル５の中心側に寄せて供給口９ａに対し内接する位置に
し、前記通路孔９に圧送した切削液を圧力を高めて高速
に吐出させ、通路孔９の先端部を小径にし工具本体１の
ドリル取付孔４ｄがある先端部の強度低下を少なくす
る。
(57) [Abstract] [Purpose] A hole with a throw-away tip that can efficiently supply a large amount of cutting fluid to the center drill 5 and the cutting part of the workpiece by this drill 5 without reducing the strength of the tool body 1. Provide drilling tools. [Structure] Center drill 5 at the center of the tip of the tool body 1.
Two cutting fluid passage holes 9 axially penetrating the tool body 1 by fixing the throw-away tips 7 to the rear end portions of the tip pockets 4a provided at two locations in the circumferential direction of the tool body 1. Are provided on both sides of the center drill 5, and the passage hole 9 is formed to have a gradually smaller diameter from the supply port 9a at the end toward the discharge port 9b at the tip, and the discharge port 9b is brought closer to the center side of the drill 5 to form the supply port. 9a, the cutting fluid pressure-fed to the passage hole 9 is discharged at high speed by increasing the pressure, and the tip of the passage hole 9 has a small diameter. Reduce the drop.
Description
【０００１】[0001]
この考案は、切削液通路孔を改良したスローアウェイチップ付き孔あけ工具に 関するものである。 The present invention relates to a drilling tool with a throw-away tip having an improved cutting fluid passage hole.
【０００２】[0002]
従来、スローアウェイチップ付き孔あけ工具として、工具本体の先端部にこの 工具本体の先端から刃先部が突出するセンタードリルを嵌合固定し、工具本体の 周方向の２箇所にチップポケットを形成し、チップポケットの後側壁先端部に切 削用のスローアウェイチップをそれぞれ固定したものがあった。 Conventionally, as a drilling tool with a throw-away tip, a center drill with a cutting edge protruding from the tip of the tool body is fitted and fixed to the tip of the tool body, and chip pockets are formed at two locations in the circumferential direction of the tool body. In some cases, a throw-away tip for cutting was fixed to the tip of the rear wall of the tip pocket.
【０００３】 前記孔あけ工具では、工具本体の末端面中心部に供給口が開口する１本の切削 液通路孔を工具本体の軸方向に沿って形成し、前記通路孔を工具本体の先端部で 、複数本に分岐させ、センタードリルに形成した吐出口に連通させて、センター ドリルのねじれ溝内の適所から切削油などの切削液を吐出させ、あるいは工具本 体先端部のドリル外周側に設けた複数個の吐出口から切削液を吐出させて、セン タードリルおよびこれによる工作物の切削加工部の冷却と、この加工部の潤滑と を行なっていた。In the drilling tool, one cutting fluid passage hole having a supply port opening is formed in the center of the end surface of the tool body along the axial direction of the tool body, and the passage hole is formed at the tip of the tool body. Then, branch into multiple pieces and communicate with the discharge port formed in the center drill to discharge cutting fluid such as cutting oil from the proper place in the twist groove of the center drill, or to the outer periphery of the drill at the tip of the tool body. The cutting fluid was discharged from a plurality of discharge ports provided to cool the center drill and the cutting portion of the workpiece by this, and to lubricate this processing portion.
【０００４】[0004]
前述した従来のスローアウェイチップ付き孔あけ工具では、工具本体の中心と 同心に１本の切削液通路孔を軸方向に形成し、この通路孔を工具本体の末端面に 開口する供給口から工具本体の先端部まで等径の直線状とし、先端部で２本など 複数本の分岐孔に分岐させ、工具本体の軸方向と傾斜する前記通路孔の分岐孔の 先端に吐出口を開口させているので、工具本体の先端部にはセンタードリルの取 付孔があるなど、工具本体の強度との関係によって、前記通路孔および分岐孔の 径をあまり大きくできない上に、通路孔の１本の部分に対し、通路孔の分岐孔が 屈曲しており、通路孔を流通する切削液の抵抗が大きくなるので、多量の切削液 を前記吐出孔から吐出させることができず、切削液の供給量が不足するという問 題点がある。 In the above-mentioned conventional drilling tool with a throw-away tip, one cutting fluid passage hole is formed in the axial direction concentrically with the center of the tool body, and this passage hole is opened from the supply port that opens to the end face of the tool body. Make a straight line of equal diameter up to the tip of the main body, branch it into two or more branch holes at the tip, and open the discharge port at the tip of the branch hole of the passage hole that is inclined with the axial direction of the tool body. Since there is a center drill attachment hole at the tip of the tool body, the diameter of the passage hole and the branch hole cannot be made too large due to the strength of the tool body. Since the branch hole of the passage hole is bent with respect to the part, and the resistance of the cutting fluid flowing through the passage hole becomes large, a large amount of cutting fluid cannot be discharged from the discharge hole, and the amount of cutting fluid supplied There is a problem that there is a shortage.
【０００５】 そこで、工具本体に２本の切削液通路孔を軸方向に供給口から吐出口まで、等 径の直線状に形成することが考えられる。しかし、これは工具本体の先端部では 、センタードリルが小径であるため、２本の前記通路孔を互いに接近させて形成 する必要があり、工具本体の強度上の理由で、２本の通路孔を大径にすることが できず、多量の切削液を前記吐出口から吐出できないという問題点がある。Therefore, it is conceivable to form two cutting fluid passage holes in the tool body in the axial direction from the supply port to the discharge port in a straight line of equal diameter. However, since the center drill has a small diameter at the tip of the tool body, it is necessary to form the two passage holes close to each other, and because of the strength of the tool body, two passage holes are required. However, there is a problem in that a large amount of cutting fluid cannot be discharged from the discharge port.
【０００６】 この考案は、前述した問題点を解決して、従来のものに比べて、工具本体の強 度をほとんど低下させることなく、多量の切削液を吐出口からセンタードリルの 外周およびこれによる工作物の切削加工部に効率よく供給し、切削液の供給量を 充分にできる、スローアウェイチップ付き孔あけ工具を提供することを目的とし ている。This invention solves the above-mentioned problems, and in comparison with the conventional one, a large amount of cutting fluid is discharged from the discharge port to the outer periphery of the center drill and the same, without substantially lowering the strength of the tool body. It is an object of the present invention to provide a drilling tool with a throw-away tip that can efficiently supply the cutting fluid to the cutting part of a workpiece and supply a sufficient amount of cutting fluid.
【０００７】[0007]
この考案は、前述のように工具本体の先端部に設けたセンタードリルと、２箇 所のチップポケット後側壁先端部に設けたスローアウェイチップとを備えたスロ ーアウェイチップ付き孔あけ工具において、工具本体の末端面に供給口が開口し 、工具本体の先端部に吐出口が開口する２本の切削液通路孔を工具本体の軸方向 に貫通させて前記センタードリルの両側に配設し、前記通路孔を前記供給口から 前記吐出口に向けて次第に小径に形成すると共に、吐出口をセンタードリルの中 心側に寄せて供給口に対し内接する位置に配置したものである。 This invention is a drilling tool with a throw-away tip equipped with a center drill provided at the tip of the tool body as described above and a throw-away tip provided at the tip of the rear side wall of two tip pockets. Two cutting fluid passage holes, each of which has a supply port opening at the end face of the tool body and a discharge port opening at the tip of the tool body, are arranged on both sides of the center drill by penetrating in the axial direction of the tool body. The passage hole is formed to have a gradually smaller diameter from the supply port toward the discharge port, and the discharge port is arranged closer to the center of the center drill so as to be inscribed in the supply port.
【０００８】[0008]
この考案によるスローアウェイチップ付き孔あけ工具は、工具本体に形成した ２本の切削液通路孔を、工具本体の末端面に開口する供給口から工具本体の先端 部に開口する吐出口に向けて次第に小径にしたことで、前記通路孔の末端側の部 分をかなり大径にでき、小径になるのは吐出口に近い前記通路孔の先端部のみで あるため、吐出口から２本の前記通路孔に圧送した切削液を通路の先端部で圧力 を高めて、吐出孔から高速に吐出させることができ、また、切削液通路孔の吐出 口をセンタードリルの中心側に寄せて供給口に対し内接する位置に配置したので 、前記通路孔に圧送した切削液を屈曲させることなく直線的に小さい抵抗で吐出 すことができ、吐出口から多量の切削液を供給できる。 In the drilling tool with a throw-away tip according to the present invention, the two cutting fluid passage holes formed in the tool body are directed from the supply port opened at the end face of the tool body to the discharge port opened at the tip of the tool body. By gradually reducing the diameter, the end portion of the passage hole can be made considerably larger in diameter, and only the tip portion of the passage hole near the discharge port can be reduced in diameter. The pressure of the cutting fluid pumped to the passage hole can be increased at the tip of the passage so that it can be discharged at high speed from the discharge hole, and the discharge port of the cutting liquid passage hole can be moved closer to the center of the center drill to the supply port. Since it is arranged at the position inscribed with respect to the inside, the cutting fluid pumped into the passage hole can be discharged linearly with a small resistance without bending, and a large amount of cutting fluid can be supplied from the discharge port.
【０００９】 さらに、切削液通路孔の吐出口を前記ドリルの中心側に寄せて供給口に対し内 接する位置に配置したことで、センタードリルの工具本体先端から突出した部分 の外周に近接した位置から切削液を吐出させることができ、前記ドリルおよびこ れによる工作物の切削加工部の冷却とこの加工部の潤滑とを効率よくでき、２本 の前記通路孔の吐出口に近い先端部が小径であるため、これらの先端部が前記ド リルの取付孔に接近しても工具本体の強度の低下がほとんどない。Furthermore, by disposing the discharge port of the cutting fluid passage hole in a position inwardly of the center of the drill and in contact with the supply port, the position close to the outer periphery of the portion of the center drill protruding from the tip of the tool body It is possible to discharge the cutting fluid from the above, and it is possible to efficiently cool the cutting portion of the workpiece by the drill and this and to lubricate this processing portion, and the tip portions of the two passage holes close to the discharge port can be Since the diameter is small, the strength of the tool body is hardly reduced even when these tips approach the mounting holes of the drill.
【００１０】[0010]
以下、この考案の一実施例につき図を参照して説明する。 図１ないし図４の各図に示すように、工具本体１はストレートシャンク２の先 端側に大径のフランジ部３を介して軸部４が一体に形成してある。 前記シャンク２には、上面と側面とに末端からフランジ部３近くまで延びる１ 対のサイドロック用切欠部２ａを、これらの幅方向中心線を円周方向に９０°の 間隔を設けてそれぞれ配置してある。なお、前記フランジ部３は、先端側が深く 幅広になる平坦面に形成してある。 An embodiment of the present invention will be described below with reference to the drawings. As shown in each of FIGS. 1 to 4, a tool body 1 is integrally formed with a shaft portion 4 on a front end side of a straight shank 2 via a large-diameter flange portion 3. The shank 2 is provided with a pair of side lock notches 2a extending from the end to the vicinity of the flange portion 3 on the upper surface and the side surface, with the widthwise centerlines thereof being circumferentially spaced by 90 °. I am doing it. The flange portion 3 is formed on a flat surface whose tip side is deep and wide.
【００１１】 前記軸部４には、先端からシャンク２に向かってフランジ部３近くまで延びる ２本のチップポケット４ａを、周方向に等間隔で鈍角のほぼＶ字状にそれぞれ形 成してある。前記チップポケット４ａは、先端からシャンク２に向かって次第に 深さが深くなり、前側壁４ａ1 に対し後側壁４ａ2 を幅狭にし、シャンク２に向 かって前側壁４ａ1 を次第に幅広にしてある。On the shaft portion 4, two chip pockets 4a extending from the tip toward the shank 2 to near the flange portion 3 are formed in an obtuse angle V-shape at equal intervals in the circumferential direction. . Said chip pocket 4a, the tip becomes deeper gradually deep toward the shank 2 from the front to the narrow rear sidewall 4a 2 to the side wall 4a 1, there gradually in the wide front side wall 4a 1 tint toward the shank 2 .
【００１２】 また、前記切欠部２ａの幅方向中心線とチップポケット４ａの後側壁４ａ2 外 縁とを、後側壁４ａ2 の先端で周方向に４５°ずらし、末端部で周方向に一致さ せてある。Further, of matching the a side wall 4a 2 outer rear edge of the width-direction center line and the chip pockets 4a of the notch 2a, shifted 45 ° in the circumferential direction at the tip of the rear side wall 4a 2, in the circumferential direction at the distal end I have it.
【００１３】 さらに、軸部４には、チップポケット４ａの前側壁４ａ1 外周の稜線を削除し た平坦面４ｂを形成し、これらの先端部には先端に向かって削除量を多くした傾 斜部４ｃが形成してある。なお、両チップポケット４ａは後側壁４ａ2 を基準に してほぼ対称に形成してある。Further, the shaft portion 4 is formed with a flat surface 4b in which the ridgeline of the outer periphery of the front side wall 4a 1 of the chip pocket 4a is removed, and the tip portions of these are inclined so that the removal amount increases toward the tip. The part 4c is formed. Both chip pockets 4a are formed substantially symmetrically with respect to the rear side wall 4a 2 .
【００１４】 前記軸部４の先端中心部には、凹部４ｅと、これに連なる取付孔４ｄとを工具 本体１の中心と同心に軸方向に沿って設け、センタードリル５の小径シャンク部 ５ａを取付孔４ｄに嵌合させ、段部５ｄを凹部４ｅの底に支持させ、小径シャン ク部５ａを軸部４に外周側からねじ嵌合させたロックねじ６によって着脱可能に 固定し、センタードリル５の刃先部５ｂを軸部４の先端から突出させ、刃先部５ ｂ間に設けた２本のねじれ溝５ｃの末端部を２本の前記チップポケット４ａ先端 部の底部にそれぞれ連なるようにしてある。At the center of the tip of the shaft portion 4, a concave portion 4e and a mounting hole 4d connected to the concave portion 4e are provided along the axial direction concentrically with the center of the tool body 1, and a small-diameter shank portion 5a of the center drill 5 is provided. The center drill is fitted in the mounting hole 4d, the step 5d is supported on the bottom of the recess 4e, and the small-diameter shank 5a is detachably fixed by the lock screw 6 screwed onto the shaft 4 from the outer peripheral side. The blade tip portion 5b of No. 5 is projected from the tip of the shaft portion 4 so that the end portions of the two twisted grooves 5c provided between the blade tip portions 5b are connected to the bottom portions of the tip portions of the two chip pockets 4a, respectively. is there.
【００１５】 軸部４の先端部には、チップポケット４ａの後側壁４ａ2 に凹部４ｆを形成し 、これらの凹部４ｆに平行四辺形状の切削用のスローアウェイチップ７を支持さ せ、これらのチップ７の孔にチップポケット側から通した締付けねじ８によって 前記チップ７を軸部４に着脱可能に締付け固定し、前記チップ７の外周縁部に形 成した刃部７ａを軸部４の先端から若干突出させてある。前記チップ７の一方は センタードリル５の外周に若干喰込ませて配置し、前記チップ７の他方は刃部７ ａを軸部４の先端部外周から若干突出させ、さらに、一方のチップ７の軸部４外 周側部と他方のチップ７の軸部４中心側部とを軸部４の半径方向に幾分重なるよ うに配置してある。At the tip of the shaft portion 4, recesses 4f are formed in the rear side wall 4a 2 of the tip pocket 4a. The recesses 4f are used to support the throw-away insert 7 for cutting a parallelogram. The tip 7 is detachably tightened and fixed to the shaft portion 4 by a tightening screw 8 which is passed through the hole of the tip 7 from the chip pocket side, and a blade portion 7a formed on the outer peripheral edge portion of the tip 7 is provided at the tip of the shaft portion 4. It is slightly projected from. One of the tips 7 is arranged so as to slightly dig into the outer periphery of the center drill 5, and the other of the tips 7 has the blade portion 7a slightly protruded from the outer periphery of the tip portion of the shaft portion 4. The outer peripheral side portion of the shaft portion 4 and the central side portion of the shaft portion 4 of the other tip 7 are arranged so as to overlap each other in the radial direction of the shaft portion 4.
【００１６】 図１ないし図４に示すように、工具本体１の末端面には、切削液の供給口９ａ を開口させ、工具本体１の先端部に切削液の吐出口９ｂが開口する２本の切削液 通路孔９を、センタードリル５の中心の両側に互いに対向させて配設し、２本の 前記通路孔９は供給口９ａから吐出口９ｂに向けて次第に小径となる形状に形成 し、吐出口９ｂをドリル中心側に寄せて、供給口９ａに対し内接する位置にそれ ぞれ形成してある。そして、吐出口９ｂは、センタードリル５のねじれ溝５ｃに 対しドリル回転方向前側にそれぞれ開口させ、各チップポケット４ａの前側壁４ ａ1 先端部を、チップポケット４ａに開放した横断面半円弧状に軸方向に短い長 さだけ切欠き、センタードリル５の外周と近接する位置に配置してある。As shown in FIG. 1 to FIG. 4, a cutting fluid supply port 9 a is opened at the end surface of the tool body 1, and a cutting fluid discharge port 9 b is opened at the tip of the tool body 1. The cutting fluid passage holes 9 are disposed on both sides of the center of the center drill 5 so as to face each other, and the two passage holes 9 are formed in a shape in which the diameter gradually decreases from the supply port 9a to the discharge port 9b. The discharge port 9b is located closer to the center of the drill and is formed at a position inscribed in the supply port 9a. Then, the discharge port 9b, respectively are opened in the drill rotation direction front side against the torsion groove 5c of the center drill 5, a front wall 4 a 1 tip of each chip pocket 4a, cross-sectional semicircular open to insert pocket 4a A short length is cut out in the axial direction, and it is arranged at a position close to the outer circumference of the center drill 5.
【００１７】 さらに、２本の通路孔９の先端部から分岐して先端側斜め外周側に延びる小径 の分岐孔９ｃを軸部４に形成し、分岐孔９ｃの先端には軸部４に設けた平坦面４ ｂの傾斜部４ｃに位置する分岐吐出口９ｄが開口させてある。Further, a small-diameter branch hole 9c is formed in the shaft portion 4 so as to be branched from the front end portions of the two passage holes 9 and extend obliquely to the front end side, and the front end portion of the branch hole 9c is provided in the shaft portion 4. The branch discharge port 9d located on the inclined portion 4c of the flat surface 4b is opened.
【００１８】 次に、前述した実施例の孔あけ工具による工作物ワークに対する加工について 説明する。 シャンク２をホルダー（図示省略）に嵌挿し、これに設けたねじ孔にロックボ ルトをねじ嵌合させ、サイドロック用切欠部２ａの一方に締付けてシャンク２を 前記ホルダーに固定し、ホルダーを工作機械の回転軸に装着する。Next, the machining of the work piece with the drilling tool of the above-described embodiment will be described. The shank 2 is inserted into a holder (not shown), a lock bolt is screwed into a screw hole provided in the holder, and the shank 2 is fixed to the holder by tightening it on one of the side lock notches 2a. Mount on the rotating shaft of the machine.
【００１９】 前記回転軸を駆動させて孔あけ工具を図３の反時計方向に回転させ、前記工作 機械に回転軸と対向させて設けたテーブルに着脱可能に予め固定してある工作物 と前記孔あけ工具との一方を、前記回転軸とテーブルとの一方の前進によって、 孔あけ工具のセンタードリル５およびスローアウェイチップ７によって、前記工 作物に孔あけ切削加工を行なう。A work which is detachably fixed in advance to a table provided on the machine tool facing the rotary shaft by driving the rotary shaft to rotate the drilling tool counterclockwise in FIG. One of the drilling tools is moved forward with respect to one of the rotary shaft and the table, and the center drill 5 and the throw-away tip 7 of the drilling tool are used to perform drilling and cutting of the workpiece.
【００２０】 この切削加工は、工作機械側に設けた切削液供給装置によって、工具本体１に 設けた２本の切削液通路孔９に切削油などの切削液をシャンク２の末端面に開口 する供給口９ａから圧送し、前記通路孔９に通して軸部４の先端部に開口する吐 出口９ｂから吐出させると共に、前記通路孔９から分岐した分岐孔９ｃに切削液 を分流させ、これらの先端に設けた分岐吐出口９ｄから吐出させつつ行なう。In this cutting process, a cutting fluid supply device provided on the machine tool side opens cutting fluid such as cutting oil into the two cutting fluid passage holes 9 provided in the tool body 1 at the end surface of the shank 2. The liquid is pressure-fed from the supply port 9a, discharged through an outlet 9b that opens through the passage hole 9 at the tip of the shaft portion 4, and the cutting fluid is diverted into a branch hole 9c that branches off from the passage hole 9. It is performed while discharging from the branch discharge port 9d provided at the tip.
【００２１】 そして、２本の切削液通路孔９の先端にそれぞれ設けた吐出口９ｂは、各チッ プポケット４ａの前側壁４ａ1 先端部を、チップポケット４ａ側に開放した横断 面半円弧状に軸方向に短い長さだけ切欠いてあるので、軸部４の先端前方にその 中心側に若干傾斜して、前記通路孔９を流通する切削液が吐出口９ｂから吐出さ れ、これらの吐出孔９ｂがセンタードリル５の外周に近接していることもあって 、このドリル５の外周およびドリル５による工作物の切削加工部に効率よく供給 できる。The discharge ports 9b provided at the tips of the two cutting fluid passage holes 9 are formed in a semicircular arc shape with the tip of the front side wall 4a 1 of each chip pocket 4a open to the chip pocket 4a side. Since it is cut out by a short length in the axial direction, the cutting fluid flowing through the passage hole 9 is discharged from the discharge port 9b at a front end of the shaft portion 4 with a slight inclination toward the center side thereof. Since 9b is close to the outer circumference of the center drill 5, it can be efficiently supplied to the outer circumference of the drill 5 and the cutting portion of the workpiece by the drill 5.
【００２２】 また、分岐孔９ｃに分流した切削液は、分岐孔９ｃが前方斜め外側に傾斜して いることで、分岐吐出口９ｄからスローアウェイチップ７およびこれらのチップ ポケット７の刃部７ａによる工作物の切削加工部に効率よく供給できる。Further, the cutting fluid diverted to the branch hole 9c is discharged from the branch discharge port 9d by the throw-away tip 7 and the blade portion 7a of these tip pockets 7 because the branch hole 9c is inclined forward and obliquely outward. It can be efficiently supplied to the cutting part of the workpiece.
【００２３】 さらに、この実施例では、２本の切削液通路孔９が工具本体１の末端面の供給 口９ａから先端部の吐出口９ｂに向けて次第に小径で形成してあるので、供給口 ９ａから前記通路孔９に圧送した切削液が吐出口９ｂに近い前記通路孔９の先端 部では圧力が高く高速になることで、分岐孔９ｃに切削液を分流させても、供給 口９ａに直線状に連なる吐出口９ｂから吐出する切削液が従来のものより高速で 流量も多くなる。なお、外径が小さいこの考案による孔あけ工具では、分岐孔を 省略してもよい。Further, in this embodiment, the two cutting fluid passage holes 9 are formed so as to have a gradually smaller diameter from the supply port 9a at the end face of the tool body 1 toward the discharge port 9b at the tip portion. The cutting fluid pressure-fed from 9a to the passage hole 9 has high pressure and high speed at the tip of the passage hole 9 near the discharge port 9b, so that even if the cutting fluid is diverted to the branch hole 9c, the cutting fluid is supplied to the supply port 9a. The cutting fluid discharged from the discharge ports 9b that are linearly connected is faster and has a larger flow rate than the conventional one. The branch hole may be omitted in the drilling tool according to the present invention having a small outer diameter.
【００２４】 また、前述した実施例による孔あけ工具は、横軸の旋盤の刃物台などの非回転 部材に、シャンク２をホルダーを介して装着し、孔あけ工具を回転させることな く、工作物を着脱可能に固定したテーブルを回転させて、前記非回転部材とテー ブルとの一方を移動させて加工を行なってもよい。In addition, the drilling tool according to the above-described embodiment is mounted on a non-rotating member such as a tool rest of a lathe having a horizontal axis by attaching the shank 2 through a holder, without rotating the drilling tool. Processing may be performed by rotating a table to which an object is detachably fixed and moving one of the non-rotating member and the table.
【００２５】 この考案において、工具本体のシャンクの構成、形状は、サイドロック用切欠 部を１個にするなど適宜変更でき、また、チップポケットを従来のものと同様に 軸部の軸方向と平行に延びるものにするなど適宜変更でき、切削用のスローアウ ェイチップも、２個ともセンタードリルの外周部に内端を有し、軸部の外周から 外端を若干突出させたものにするなど適宜変更できる。In this invention, the structure and shape of the shank of the tool body can be changed as appropriate, for example, by providing one side lock notch, and the tip pocket is parallel to the axial direction of the shaft as in the conventional one. It can be changed as appropriate, for example, and the two throwaway tips for cutting also have an inner end on the outer periphery of the center drill, with the outer end slightly protruding from the outer periphery of the shaft. it can.
【００２６】[0026]
以上説明したように、この考案によるスローアウェイチップ付き孔あけ工具は 、工具本体に形成した２本の切削液通路孔を、工具本体の末端面に開口する供給 口から工具本体の先端部に開口する吐出口に向けて次第に小径にしたことで、前 記通路孔の末端側の部分をかなり大径にでき、小径になるのは吐出口に近い前記 通路孔の先端部のみであるため、吐出口から２本の前記通路孔に圧送した切削液 を通路の先端部で圧力を高めて、吐出孔から高速に吐出させることができ、また 、切削液通路孔の吐出口をセンタードリルの中心側に寄せて供給口に対し内接す る位置に配置したので、前記通路孔に圧送した切削液を屈曲させることなく直線 的に小さい抵抗で吐出すことができ、吐出口から多量の切削液を供給できる。 As described above, in the drilling tool with a throw-away tip according to the present invention, the two cutting fluid passage holes formed in the tool body are opened from the supply port opening at the end face of the tool body to the tip of the tool body. By gradually reducing the diameter toward the discharge port, the diameter of the distal end of the passage hole can be made considerably large, and only the tip of the passage hole near the discharge port can be made smaller, so The cutting fluid that has been pumped from the outlet to the two passage holes can be discharged at high speed by increasing the pressure at the tip of the passage, and the discharge port of the cutting fluid passage hole is located at the center side of the center drill. Since it is located close to the inlet and inscribed in the supply port, the cutting fluid pumped into the passage hole can be discharged linearly with a small resistance without bending, and a large amount of cutting fluid can be discharged from the discharge port. Can be supplied.
【００２７】 従って、この考案は、切削液を吐出孔からセンタードリルの外周およびこのド リルによる工作物の切削加工部に効率よく充分に供給することができ、工具を高 速回転させることが可能になるなどによって、能率よく工作物を加工できる。Therefore, according to the present invention, the cutting fluid can be efficiently and sufficiently supplied from the discharge hole to the outer periphery of the center drill and the cutting portion of the workpiece by this drill, and the tool can be rotated at high speed. You can process the work piece efficiently.
【００２８】 さらに、この考案は、前述したように切削液通路孔の吐出口を前記ドリルの中 心側に寄せて供給口に対し内接する位置に配置したことで、センタードリルの工 具本体先端から突出した部分の外周に近接した位置から切削液を吐出させること ができ、前記ドリルおよびこれによる工作物の切削加工部の冷却とこの加工部の 潤滑とを効率よくでき、２本の前記通路孔の吐出口に近い先端部が小径であるた め、これらの先端部が前記ドリルの取付孔に接近しても工具本体の強度の低下が ほとんどない。Further, according to the present invention, as described above, the discharge port of the cutting fluid passage hole is arranged at a position inwardly of the center of the drill so as to be inscribed in the supply port. It is possible to discharge the cutting fluid from a position close to the outer periphery of the portion protruding from, and it is possible to efficiently cool the cutting portion of the drill and the work piece by the drill and efficiently lubricate the processing portion, and thus the two passages Since the tip of the hole near the discharge port has a small diameter, the strength of the tool body is hardly reduced even when these tips approach the mounting hole of the drill.
【図１】この考案の一実施例によるスローアウェイチッ
プ付き孔あけ工具を示した側面図FIG. 1 is a side view showing a drilling tool with a throw-away tip according to an embodiment of the present invention.
【図２】図１に示した孔あけ工具の平面図FIG. 2 is a plan view of the drilling tool shown in FIG.
【図３】図１に示した孔あけ工具の正面図FIG. 3 is a front view of the drilling tool shown in FIG.
【図４】図１に示した孔あけ工具の背面図FIG. 4 is a rear view of the drilling tool shown in FIG.
【符号の説明】 １ 工具本体 ２ シャンク ３ フランジ部 ４ 軸部 ４ａ チップポケット ４ａ1 前側壁 ４ａ2 後側壁 ４ｂ 平坦面 ４ｃ 平坦面の傾斜部 ４ｄ ドリル取付孔 ５ センタードリル ５ａ シャンク部 ５ｂ 刃先部 ５ｃ ねじれ溝 ７ スローアウェイチップ ７ａ 刃部 ９ 切削液通路孔 ９ａ 供給口 ９ｂ 吐出口 ９ｃ 分岐孔 ９ｄ 分岐吐出口[Explanation of symbols] 1 Tool body 2 Shank 3 Flange portion 4 Shaft portion 4a Tip pocket 4a 1 Front side wall 4a 2 Rear side wall 4b Flat surface 4c Flat surface sloped portion 4d Drill mounting hole 5 Center drill 5a Shank portion 5b Blade tip portion 5c Twisted groove 7 Throw-away tip 7a Blade portion 9 Cutting fluid passage hole 9a Supply port 9b Discharge port 9c Branch hole 9d Branch discharge port
Claims (1)
から刃先部が突出するセンタードリルを嵌合固定し、工
具本体の周方向の２箇所にチップポケットを形成し、チ
ップポケットの後側壁先端部に切削用のスローアウェイ
チップをそれぞれ固定したスローアウェイチップ付き孔
あけ工具において、工具本体の末端面に供給口が開口
し、工具本体の先端部に吐出口が開口する２本の切削液
通路孔を工具本体の軸方向に貫通させて前記センタード
リルの両側に配設し、前記通路孔を前記供給口から前記
吐出口に向けて次第に小径に形成すると共に、吐出口を
センタードリルの中心側に寄せて供給口に対し内接する
位置に配置したことを特徴とするスローアウェイチップ
付き孔あけ工具。1. A center drill having a cutting edge protruding from the tip of the tool body is fitted and fixed to the tip of the tool body, and chip pockets are formed at two locations in the circumferential direction of the tool body, and a rear wall of the chip pocket. In a drilling tool with throw-away inserts, each of which has a throw-away insert for cutting attached to the tip, two cutting fluids with a supply port opening at the end face of the tool body and a discharge port opening at the tip of the tool body. The passage hole is provided in both sides of the center drill by penetrating in the axial direction of the tool body, and the passage hole is formed to have a gradually smaller diameter from the supply port toward the discharge port, and the discharge port is formed at the center of the center drill. A drilling tool with a throw-away tip, which is located at a position inscribed to the side and inscribed in the supply port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993062146U JP2591570Y2 (en) | 1993-11-18 | 1993-11-18 | Drilling tool with indexable insert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993062146U JP2591570Y2 (en) | 1993-11-18 | 1993-11-18 | Drilling tool with indexable insert |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0731218U true JPH0731218U (en) | 1995-06-13 |
| JP2591570Y2 JP2591570Y2 (en) | 1999-03-03 |
Family
ID=13191674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993062146U Expired - Lifetime JP2591570Y2 (en) | 1993-11-18 | 1993-11-18 | Drilling tool with indexable insert |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591570Y2 (en) |
-
1993
- 1993-11-18 JP JP1993062146U patent/JP2591570Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2591570Y2 (en) | 1999-03-03 |
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