JPH06144859A - Diamond core drill - Google Patents
Diamond core drillInfo
- Publication number
- JPH06144859A JPH06144859A JP31564192A JP31564192A JPH06144859A JP H06144859 A JPH06144859 A JP H06144859A JP 31564192 A JP31564192 A JP 31564192A JP 31564192 A JP31564192 A JP 31564192A JP H06144859 A JPH06144859 A JP H06144859A
- Authority
- JP
- Japan
- Prior art keywords
- diamond
- outer peripheral
- peripheral surface
- core drill
- hole
- 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
Links
Landscapes
- Drilling Tools (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、板ガラス等の硬脆材料
に孔開け加工を施すためのダイヤモンドコアードリルに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond core drill for drilling a hard and brittle material such as plate glass.
【０００２】[0002]
【従来の技術】ダイヤモンドコアードリル１は、図１３
に示すように、鋼製のシャンク３の先端に付設したダイ
ヤモンド砥石部２をもって被加工材を研削削除すること
により孔を開ける工具である。このダイヤモンドコアー
ドリル１には、研削領域に水を供給するための軸心貫通
孔４が設けられている。例えばガラス等の被加工材を研
削する際、この軸心貫通孔４に水を供給すると、この水
は、ダイヤモンド砥石部２の先端面及び外周面とガラス
の被研削面との間の隙間を通過する間に、その研削領域
を冷却すると同時に、ガラスの切り粉及び脱落したダイ
ヤモンド砥粒を洗い流して、それらと一緒に外部に排出
される。これによって、ダイヤモンドコアードリル１の
掘進速度が増加するとともに、ダイヤモンド砥石部２の
寿命も延長される。2. Description of the Related Art A diamond core drill 1 is shown in FIG.
As shown in FIG. 3, the tool is a tool for making a hole by grinding and removing the workpiece with the diamond grindstone portion 2 attached to the tip of the steel shank 3. The diamond core drill 1 is provided with a shaft center through hole 4 for supplying water to the grinding area. For example, when grinding a work material such as glass, if water is supplied to the axial center through hole 4, this water causes a gap between the tip surface and the outer peripheral surface of the diamond grindstone portion 2 and the grinding surface of glass. During the passage, the grinding area is cooled, and at the same time, the glass chips and the diamond abrasive particles that have fallen off are washed off and discharged together with them. As a result, the excavation speed of the diamond core drill 1 is increased and the life of the diamond grindstone portion 2 is extended.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来のダイヤモンドコアードリル１にあっては、ダイヤモ
ンド砥石部２の外周面が円筒形であるために、水が通過
するダイヤモンド砥石部２の研削面（外周面）とガラス
の被研削面との間の隙間は相当に狭くなっており、それ
ゆえ、ガラスが比較的厚い場合に、研削の進行に伴って
研削深さが増大してくると、前記隙間を流れる水は極め
て大きな抵抗を受けることになる。このような場合に
は、軸心貫通孔４を介して供給された水の流量は、その
供給圧力に限度があることから、急激に減少してしまっ
て、その結果、前記冷却作用及び洗浄作用をもはや奏し
得なくなってしまうという問題があった。However, in the above-mentioned conventional diamond core drill 1, since the outer peripheral surface of the diamond grindstone portion 2 is cylindrical, the grinding surface of the diamond grindstone portion 2 through which water passes ( The gap between the outer peripheral surface) and the surface to be ground of glass is considerably narrowed. Therefore, when the glass is relatively thick, the grinding depth increases as the grinding progresses. The water flowing through the gap will be subjected to extremely large resistance. In such a case, the flow rate of water supplied through the shaft center through hole 4 is rapidly reduced due to the limited supply pressure, and as a result, the cooling action and the cleaning action are performed. There was a problem that I could no longer play.
【０００４】本発明は、このような問題点に着目してな
されたもので、ダイヤモンド砥石部の外周面と被加工材
の被研削面との間の隙間を部分的に拡大して、研削の全
工程にわたって水の供給排出流量を十分に確保すること
を目的とする。The present invention has been made in view of such a problem, and the gap between the outer peripheral surface of the diamond grindstone portion and the surface to be ground of the workpiece is partially enlarged to perform grinding. The objective is to secure a sufficient supply and discharge flow rate of water throughout the entire process.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明においては、回転軸として作用するシャンク
の先端にダイヤモンド砥石部を備えたダイヤモンドコア
ードリルであって、水を供給するための軸心貫通孔を有
しているものにおいて、ダイヤモンド砥石部の外周面の
形状が、シャンクの回転軸線に関して点対称であり、そ
して、ダイヤモンド砥石部の外周面からシャンクの回転
軸線へ下ろした垂線の長さが、ダイヤモンド砥石部の外
周面に沿ったシャンクの回転方向の変位に応じて変化し
ていることを特徴としている。In order to achieve the above object, in the present invention, there is provided a diamond core drill having a diamond grindstone portion at the tip of a shank acting as a rotary shaft, for supplying water. In those having an axial through hole, the shape of the outer peripheral surface of the diamond grindstone portion is point-symmetric with respect to the rotation axis of the shank, and of the perpendicular drawn from the outer peripheral surface of the diamond grindstone portion to the rotation axis of the shank. It is characterized in that the length changes according to the displacement in the rotational direction of the shank along the outer peripheral surface of the diamond grindstone portion.
【０００６】[0006]
【作用】ダイヤモンド砥石部の外周面の形状は、シャン
クの回転軸線に関して点対称であり、そして、ダイヤモ
ンド砥石部の外周面からシャンクの回転軸線へ下ろした
垂線の長さは、ダイヤモンド砥石部の外周面に沿ったシ
ャンクの回転方向の変位に応じて変化しているので、ダ
イヤモンド砥石部の外周面と被加工材の被研削面との間
には、回転軸線に対して平行に延びる拡大された凹部も
しくは隙間が必然的に生じる。したがって、軸心貫通孔
に供給された水は、ダイヤモンド砥石部の先端面を通過
した後、この凹部もしくは隙間を通って、もはや過大な
抵抗を受けることなく外部に排出される。しかもこの場
合、ダイヤモンド砥石部の外周面の形状は点対称である
ために、この凹部もしくは隙間も同様に点対称に配置さ
れている。それゆえ、ダイヤモンド砥石部の凹部もしく
は隙間を流れる水は、ダイヤモンド砥石部の外周面に対
して一様な流体潤滑作用を及ぼすようになるので、ダイ
ヤモンドコアードリルの回転は極めて円滑かつ静粛に行
われる。[Function] The shape of the outer peripheral surface of the diamond grindstone is point-symmetric with respect to the rotation axis of the shank, and the length of the perpendicular line drawn from the outer peripheral surface of the diamond grindstone to the rotation axis of the shank is the outer circumference of the diamond grindstone. Since it changes according to the displacement in the rotational direction of the shank along the surface, it extends parallel to the axis of rotation between the outer peripheral surface of the diamond grindstone and the surface to be ground of the workpiece. Inevitably a recess or gap is created. Therefore, the water supplied to the shaft center through hole passes through the tip surface of the diamond grindstone portion and then passes through this recess or gap to be discharged outside without any excessive resistance. Moreover, in this case, since the shape of the outer peripheral surface of the diamond grindstone portion is point-symmetrical, this recess or gap is also arranged point-symmetrically. Therefore, the water flowing through the concave portion or the gap of the diamond grindstone portion exerts a uniform fluid lubrication action on the outer peripheral surface of the diamond grindstone portion, so that the rotation of the diamond core drill is performed extremely smoothly and quietly. .
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１及び図２は、ダイヤモンド砥石部２の
外周面が点対称の楕円形に形成されている本発明の第１
の実施例のダイヤモンドコアードリル１を示している。1 and 2 show the first embodiment of the present invention in which the outer peripheral surface of the diamond grindstone portion 2 is formed in a point-symmetrical elliptical shape.
The diamond core drill 1 of the example of FIG.
【０００９】ダイヤモンドコアードリル１は、図１３に
示す従来のものと同様に、先端面と内外周面にダイヤモ
ンドを着装したダイヤモンド砥石部２と、鋼製のシャン
ク３と、軸心貫通孔４とで構成されている。The diamond core drill 1 is similar to the conventional one shown in FIG. 13, and has a diamond grindstone portion 2 having diamond attached to the tip surface and inner and outer peripheral surfaces thereof, a steel shank 3, and a shaft center through hole 4. It is composed of.
【００１０】ダイヤモンド砥石部２は、メタルボンド砥
石あるいは電着砥石として製作される。メタルボンド砥
石は長寿命の特徴はあるが、砥石形状がやや複雑なため
成形工費がかさむ。これに対して、電着砥石は所定形状
を高精度に製作することが容易である。The diamond grindstone portion 2 is manufactured as a metal bond grindstone or an electrodeposition grindstone. Although the metal-bonded grindstone has a long service life, the shape of the grindstone is rather complicated, which increases the molding cost. On the other hand, the electrodeposition grindstone is easy to manufacture a predetermined shape with high precision.
【００１１】この実施例のダイヤモンドコアードリル１
の場合、軸心貫通孔４の内周面は、ダイヤモンド砥石部
２の外周面の形状に相応してやはり楕円形の形状を有し
ている。しかし、軸心貫通孔４の内周面の形状は、これ
に限ることなく、円筒形を含む任意の点対称の形状であ
ってもよい。また、ダイヤモンド砥石部２の先端部付近
には、必要に応じて、垂直方向に延びる溝もしくはスリ
ット７を設けることができる。ここで、溝もしくはスリ
ットを形成するに当り、シャンク３の下端面に、ダイヤ
モンド砥石部から成るセグメント（チップ）を間隔をあ
けて配列接着し、それらセグメントの間隔をもって、溝
もしくはスリットを形成するようにしてもよい。Diamond core drill 1 of this embodiment
In this case, the inner peripheral surface of the shaft center through hole 4 also has an elliptical shape corresponding to the shape of the outer peripheral surface of the diamond grindstone portion 2. However, the shape of the inner peripheral surface of the axial center through hole 4 is not limited to this, and may be any point-symmetrical shape including a cylindrical shape. If necessary, a groove or slit 7 extending in the vertical direction can be provided near the tip of the diamond grindstone portion 2. Here, in forming the groove or slit, segments (chips) made of a diamond grindstone portion are arrayed and adhered to the lower end surface of the shank 3 at intervals, and the grooves or slits are formed at the intervals of the segments. You may
【００１２】図３及び図４には、第１の実施例のダイヤ
モンドコアードリル１を用いて、硬脆材料としての板ガ
ラス５に孔開け加工を施している様子が示されている。FIGS. 3 and 4 show how the diamond core drill 1 of the first embodiment is used to perforate a plate glass 5 as a hard and brittle material.
【００１３】この場合、研削された板ガラス５の孔６の
被研削面である内周面は、楕円形のダイヤモンド砥石部
２の外周面に外接する円筒形状を成している。したがっ
て、孔６の内周面とダイヤモンド砥石部２の外周面との
間には、必然的に、拡大された凹部もしくは隙間８が生
じている。また、この実施例の場合、楕円形の軸心貫通
孔４内に研削されずに残存している板ガラス５の非研削
残部９の外周面も、軸心貫通孔４の楕円形の内周面に内
接する円筒形状を成しているので、軸心貫通孔４の内周
面と非研削残部９の外周面との間にも、拡大された凹部
もしくは隙間１０が生じている。In this case, the inner peripheral surface, which is the surface to be ground of the hole 6 of the ground plate glass 5, has a cylindrical shape circumscribing the outer peripheral surface of the elliptical diamond grindstone portion 2. Therefore, an enlarged recess or gap 8 is inevitably formed between the inner peripheral surface of the hole 6 and the outer peripheral surface of the diamond grindstone portion 2. Further, in the case of this embodiment, the outer peripheral surface of the non-grinding residual portion 9 of the plate glass 5 which remains in the elliptical shaft center through hole 4 without being ground is also the elliptical inner peripheral surface of the shaft center through hole 4. Since it has a cylindrical shape which is inscribed in, the enlarged recessed portion or the gap 10 is also formed between the inner peripheral surface of the shaft center through hole 4 and the outer peripheral surface of the unground residue 9.
【００１４】板ガラス５の孔開け加工に際して、ダイヤ
モンドコアードリル１の軸心貫通孔４に上方から水を供
給すると、この水は、主に、ダイヤモンド砥石部２と非
研削残部９間の前記凹部もしくは隙間１０並びにダイヤ
モンド砥石部２の前記溝もしくはスリット７を通過して
流れ、その際に、ダイヤモンド砥石部２の先端面と板ガ
ラス５の孔６の被研削面である下端面を冷却すると同時
に、ガラスの切り粉及び脱落したダイヤモンド砥粒を洗
い流す。その後この水は、孔６の内周面とダイヤモンド
砥石部２の外周面との間の前記凹部もしくは隙間８を通
って、ほとんど抵抗を受けることなく外部に排出され
る。それゆえ、水の供給排出流量は十分に確保される。When water is supplied from above to the axial center through hole 4 of the diamond core drill 1 at the time of punching the plate glass 5, this water is mainly the above-mentioned concave portion between the diamond grindstone portion 2 and the non-grinding residual portion 9. Flowing through the gap 10 and the groove or slit 7 of the diamond grindstone portion 2, while cooling the tip end surface of the diamond grindstone portion 2 and the lower end surface of the hole 6 of the plate glass 5 to be ground, Wash off the cutting chips and diamond abrasive grains that have fallen off. Thereafter, this water is discharged to the outside through the recess or the gap 8 between the inner peripheral surface of the hole 6 and the outer peripheral surface of the diamond grindstone portion 2 with almost no resistance. Therefore, the supply and discharge flow rate of water is sufficiently secured.
【００１５】しかもこの場合、ダイヤモンド砥石部２の
外周面の形状は点対称であるために、前記凹部もしくは
隙間８も同様に点対称に配置されており、それゆえ、こ
の凹部もしくは隙間８を流れる水は、ダイヤモンド砥石
部２の外周面に対して一様な流体潤滑作用を及ぼす。こ
れによって、ダイヤモンドコアードリル１の回転は極め
て円滑かつ静粛に行われる。Moreover, in this case, since the shape of the outer peripheral surface of the diamond grindstone portion 2 is point-symmetrical, the recesses or gaps 8 are also arranged point-symmetrically, and therefore flow through the recesses or gaps 8. Water exerts a uniform fluid lubrication action on the outer peripheral surface of the diamond grindstone portion 2. As a result, the diamond core drill 1 is rotated very smoothly and quietly.
【００１６】また、ダイヤモンド砥石部２の外周面の形
状が楕円形であることに基づいて、板ガラス５の孔６の
被研削面である下端面に係合するダイヤモンド砥石部２
の先端面の周縁部は、部分的に、回転方向に対して０か
ら１８０°の範囲内で常に傾斜している。したがって、
この周縁部の傾斜した領域は、被研削面に対して巨視的
な切れ刃を構成するようになり、研削に際して、この周
縁部の巨視的な切れ刃としての作用と、先端面の通常の
研削作用とが相俟ってダイヤモンド砥石部２の全体的な
研削効率がさらに向上することになる。Further, because the outer peripheral surface of the diamond grindstone portion 2 is elliptical, the diamond grindstone portion 2 engaging with the lower end surface of the hole 6 of the plate glass 5 which is the surface to be ground.
The peripheral portion of the tip end surface of is always inclined in the range of 0 to 180 ° with respect to the rotation direction. Therefore,
The inclined region of this peripheral portion constitutes a macroscopic cutting edge with respect to the surface to be ground, and during grinding, the action as a macroscopic cutting edge of this peripheral portion and normal grinding of the tip surface. Together with the action, the overall grinding efficiency of the diamond grindstone portion 2 is further improved.
【００１７】このようにして、水の供給排出流量が十分
に確保されること、凹部もしくは隙間８を流れる水によ
り一様な流体潤滑作用が得られること、さらにダイヤモ
ンド砥石部２の全体的な研削効率が向上することによっ
て、ダイヤモンドコアードリル１の掘進速度がさらに増
加するとともに、ダイヤモンド砥石部２の寿命も延長さ
れる。In this way, a sufficient supply and discharge flow rate of water can be secured, a uniform fluid lubrication effect can be obtained by the water flowing through the concave portion or the gap 8, and the entire grinding of the diamond grindstone portion 2 can be achieved. By improving the efficiency, the excavation speed of the diamond core drill 1 is further increased, and the life of the diamond grindstone portion 2 is extended.
【００１８】図５から図１２までには、本発明の他の実
施例が示されている。5 to 12 show another embodiment of the present invention.
【００１９】図５及び図６に示されたダイヤモンドコア
ードリル１のダイヤモンド砥石部２は、ほぼ正六角形の
外周面を有しており、この場合、軸心貫通孔４の内周面
も同様に正六角形である。The diamond grindstone portion 2 of the diamond core drill 1 shown in FIGS. 5 and 6 has a substantially regular hexagonal outer peripheral surface. In this case, the inner peripheral surface of the shaft center through hole 4 is also the same. It is a regular hexagon.
【００２０】図７及び図８に示されたダイヤモンドコア
ードリル１のダイヤモンド砥石部２は、ほぼ正四角形の
外周面を有しており、この場合、軸心貫通孔４の内周面
も同様に正四角形である。The diamond grindstone portion 2 of the diamond core drill 1 shown in FIGS. 7 and 8 has a substantially square outer peripheral surface. In this case, the inner peripheral surface of the axial center through hole 4 is also the same. It is a square.
【００２１】図９及び図１０に示されたダイヤモンドコ
アードリル１のダイヤモンド砥石部２は、ほぼ矩形の外
周面を有しており、この場合、軸心貫通孔４の内周面も
同様に矩形である。The diamond grindstone portion 2 of the diamond core drill 1 shown in FIGS. 9 and 10 has a substantially rectangular outer peripheral surface. In this case, the inner peripheral surface of the shaft center through hole 4 is also rectangular. Is.
【００２２】図１１及び図１２に示されたダイヤモンド
コアードリル１のダイヤモンド砥石部２は、ほぼ正三角
形の外周面を有しており、この場合、軸心貫通孔４の内
周面も同様に正三角形である。The diamond grindstone portion 2 of the diamond core drill 1 shown in FIGS. 11 and 12 has a substantially equilateral triangular outer peripheral surface. In this case, the inner peripheral surface of the axial through hole 4 also has the same shape. It is an equilateral triangle.
【００２３】なお、いずれの実施例においても、ダイヤ
モンド砥石部２の先端部付近に必要に応じて設けられた
溝もしくはスリット７が、ダイヤモンド砥石部２の外周
面の形状に対応して同様に点対称に配置されていれば、
そこを通過する水の流れに関連して、ダイヤモンド砥石
部２の回転は流体力学的に有利に行われる。In any of the embodiments, the grooves or slits 7 provided near the tip of the diamond grindstone portion 2 as required correspond to the shape of the outer peripheral surface of the diamond grindstone portion 2 in the same manner. If they are arranged symmetrically,
In connection with the flow of water therethrough, the rotation of the diamond grindstone portion 2 is favored hydrodynamically.
【００２４】以上、本発明の実施例を図面により説明し
てきたが、具体的な構成はこれに限定されるものではな
く、本発明の要旨を逸脱しない範囲における変更や追加
があってもそれらは本発明の範囲内に含まれる。The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration is not limited to this, and even if there are changes and additions within the scope not departing from the gist of the present invention, they will not be affected. Included within the scope of the invention.
【００２５】[0025]
【発明の効果】本発明によれば、ダイヤモンド砥石部の
外周面と被加工材の被研削面との間に、回転軸線に対し
て平行に延びる凹部もしくは隙間が必然的に生じるの
で、軸心貫通孔に供給された水は、ダイヤモンド砥石部
の先端面を通過した後、この凹部もしくは隙間を通っ
て、もはや過大な抵抗を受けることなく外部に排出され
る。それゆえ、水の供給排出流量は十分に確保される。According to the present invention, a recess or gap extending parallel to the axis of rotation is inevitably formed between the outer peripheral surface of the diamond grindstone portion and the surface to be ground of the workpiece, so that the axis center The water supplied to the through hole passes through the tip end surface of the diamond grindstone portion and then passes through this recess or gap to be discharged outside without any excessive resistance. Therefore, the supply and discharge flow rate of water is sufficiently secured.
【００２６】しかもこの場合、ダイヤモンド砥石部の外
周面の形状は点対称であるために、凹部もしくは隙間も
同様に点対称に配置されており、それゆえ、この凹部も
しくは隙間を流れる水は、ダイヤモンド砥石部の外周面
に対して一様な流体潤滑作用を及ぼす。これによって、
ダイヤモンドコアードリルの回転は極めて円滑かつ静粛
に行われる。Further, in this case, since the shape of the outer peripheral surface of the diamond grindstone is point-symmetrical, the recesses or gaps are also arranged point-symmetrically. Therefore, the water flowing through the recesses or gaps is diamond-shaped. It exerts a uniform fluid lubrication action on the outer peripheral surface of the grindstone. by this,
The rotation of the diamond core drill is extremely smooth and quiet.
【００２７】また、ダイヤモンド砥石部の外周面からシ
ャンクの回転軸線へ下ろした垂線の長さが、ダイヤモン
ド砥石部の外周面に沿ったシャンクの回転方向の変位に
応じて変化していることに基づいて、被研削面に係合す
るダイヤモンド砥石部の先端面の周縁部は、部分的に、
回転方向に対して０から１８０°の範囲内で常に傾斜し
ている。したがって、この周縁部の傾斜した領域が、被
研削面に対して巨視的な切れ刃を構成するために、研削
に際しては、この周縁部の巨視的な切れ刃としての作用
と、先端面の通常の研削作用とが相俟ってダイヤモンド
砥石部の全体的な研削効率がさらに向上する。Also, the length of the perpendicular line drawn from the outer peripheral surface of the diamond grindstone to the axis of rotation of the shank changes according to the displacement of the shank in the rotational direction along the outer peripheral surface of the diamond grindstone. The peripheral portion of the tip surface of the diamond grindstone portion that engages with the surface to be ground is partially
It is always inclined within the range of 0 to 180 ° with respect to the rotation direction. Therefore, since the inclined region of the peripheral edge constitutes a macroscopic cutting edge with respect to the surface to be ground, during grinding, the action as a macroscopic cutting edge of this peripheral edge and the normal end surface Combined with the grinding action of, the overall grinding efficiency of the diamond grindstone portion is further improved.
【００２８】[0028]
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明のダイヤモンドコアードリルの第１の実
施例の正面図である。FIG. 1 is a front view of a first embodiment of a diamond core drill of the present invention.
【図２】同第１の実施例の平面図である。FIG. 2 is a plan view of the first embodiment.
【図３】同第１の実施例を用いて板ガラスを研削してい
る工程の平面図である。FIG. 3 is a plan view of a process of grinding a plate glass by using the first embodiment.
【図４】図３の線Ａ−Ａに沿った断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG.
【図５】本発明のダイヤモンドコアードリルの第２の実
施例の正面図である。FIG. 5 is a front view of a second embodiment of the diamond core drill of the present invention.
【図６】同第２の実施例の平面図である。FIG. 6 is a plan view of the second embodiment.
【図７】本発明のダイヤモンドコアードリルの第３の実
施例の正面図である。FIG. 7 is a front view of a third embodiment of the diamond core drill of the present invention.
【図８】同第３の実施例の平面図である。FIG. 8 is a plan view of the third embodiment.
【図９】本発明のダイヤモンドコアードリルの第４の実
施例の正面図である。FIG. 9 is a front view of the fourth embodiment of the diamond core drill of the present invention.
【図１０】同第４の実施例の平面図である。FIG. 10 is a plan view of the fourth embodiment.
【図１１】本発明のダイヤモンドコアードリルの第５の
実施例の正面図である。FIG. 11 is a front view of the fifth embodiment of the diamond core drill of the present invention.
【図１２】同第５の実施例の平面図である。FIG. 12 is a plan view of the fifth embodiment.
【図１３】従来のダイヤモンドコアードリルの一部破断
正面図である。FIG. 13 is a partially cutaway front view of a conventional diamond core drill.
１ ダイヤモンドコアードリル ２ ダイ
ヤモンド砥石部 ３ シャンク ４ 軸心
貫通孔 ５ 板ガラス ６ 孔 ７ 溝もしくはスリット ８ 凹部
もしくは隙間 ９ 非研削残部 １０ 凹部
もしくは隙間1 Diamond Core Drill 2 Diamond Grindstone 3 Shank 4 Shaft Through Hole 5 Plate Glass 6 Hole 7 Groove or Slit 8 Recess or Gap 9 Non-Grinding Remaining 10 Recess or Gap
Claims (6)
ダイヤモンド砥石部を備えたダイヤモンドコアードリル
であって、水を供給するための軸心貫通孔を有している
ものにおいて、ダイヤモンド砥石部の外周面の形状が、
シャンクの回転軸線に関して点対称であり、そして、ダ
イヤモンド砥石部の外周面からシャンクの回転軸線へ下
ろした垂線の長さが、ダイヤモンド砥石部の外周面に沿
ったシャンクの回転方向の変位に応じて変化しているこ
とを特徴とするダイヤモンドコアードリル。1. A diamond core drill having a diamond grindstone portion at the tip of a shank that acts as a rotary shaft, wherein the diamond core drill has a shaft center through hole for supplying water, the outer periphery of the diamond grindstone portion. The shape of the surface is
It is point-symmetric with respect to the axis of rotation of the shank, and the length of the perpendicular drawn from the outer peripheral surface of the diamond grindstone to the axis of rotation of the shank depends on the displacement of the shank along the outer peripheral surface of the diamond grindstone. A diamond core drill that is characterized by changes.
もしくは正多角形の横断面を有する柱体の側面を成して
いる請求項１に記載のダイヤモンドコアードリル。2. The diamond core drill according to claim 1, wherein the outer peripheral surface of the diamond grindstone portion is a side surface of a column having an oval or regular polygonal cross section.
には、軸心貫通孔に供給された水を排出するための溝も
しくはスリットが形成されている請求項１又は２に記載
のダイヤモンドコアードリル。3. The diamond core drill according to claim 1, wherein a groove or a slit for discharging the water supplied to the shaft center through hole is formed on the tip end surface and the outer peripheral surface of the diamond grindstone portion. .
が、前記垂線の長さが比較的短くなっているダイヤモン
ド砥石部の表面領域に設けられている請求項３に記載の
ダイヤモンドコアードリル。4. The diamond core drill according to claim 3, wherein a groove or slit for discharging water is provided in a surface region of the diamond grindstone portion in which the length of the perpendicular is relatively short.
の回転軸線に関して点対称であり、そして、軸心貫通孔
の内周面からシャンクの回転軸線へ下ろした垂線の長さ
が、軸心貫通孔の内周面に沿ったシャンクの回転方向の
変位に応じて変化している請求項１ないし４のいずれか
に記載のダイヤモンドコアードリル。5. The shape of the inner peripheral surface of the shaft center through hole is point-symmetric with respect to the rotation axis of the shank, and the length of a perpendicular line drawn from the inner peripheral surface of the shaft center through hole to the rotation axis of the shank is The diamond core drill according to any one of claims 1 to 4, wherein the diamond core drill changes in accordance with the displacement of the shank in the rotational direction along the inner peripheral surface of the axial center through hole.
ンド砥石部の外周面の形状と相似である請求項５に記載
のダイヤモンドコアードリル。6. The diamond core drill according to claim 5, wherein the shape of the inner peripheral surface of the axial center through hole is similar to the shape of the outer peripheral surface of the diamond grindstone portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31564192A JP3306443B2 (en) | 1992-10-30 | 1992-10-30 | Diamond core drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31564192A JP3306443B2 (en) | 1992-10-30 | 1992-10-30 | Diamond core drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06144859A true JPH06144859A (en) | 1994-05-24 |
| JP3306443B2 JP3306443B2 (en) | 2002-07-24 |
Family
ID=18067813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31564192A Expired - Fee Related JP3306443B2 (en) | 1992-10-30 | 1992-10-30 | Diamond core drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3306443B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011105560A (en) * | 2009-11-19 | 2011-06-02 | Nippon Electric Glass Co Ltd | Core drill and drilling method of glass plate using the drill |
| JP2015054352A (en) * | 2013-09-10 | 2015-03-23 | 株式会社ソディック | Cutting tool |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4163071A1 (en) * | 2021-10-11 | 2023-04-12 | Hilti Aktiengesellschaft | Annular drill bit with improved drill core removal |
-
1992
- 1992-10-30 JP JP31564192A patent/JP3306443B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011105560A (en) * | 2009-11-19 | 2011-06-02 | Nippon Electric Glass Co Ltd | Core drill and drilling method of glass plate using the drill |
| JP2015054352A (en) * | 2013-09-10 | 2015-03-23 | 株式会社ソディック | Cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3306443B2 (en) | 2002-07-24 |
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