JP2581987Y2 - Glass drill - Google Patents
Glass drillInfo
- Publication number
- JP2581987Y2 JP2581987Y2 JP1992075369U JP7536992U JP2581987Y2 JP 2581987 Y2 JP2581987 Y2 JP 2581987Y2 JP 1992075369 U JP1992075369 U JP 1992075369U JP 7536992 U JP7536992 U JP 7536992U JP 2581987 Y2 JP2581987 Y2 JP 2581987Y2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- shank
- blade
- cutting blade
- cutting
- 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
- Drilling Tools (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は立方晶窒化硼素砥粒を用
いたガラス穿孔具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass drill using cubic boron nitride abrasive grains.
【０００２】[0002]
【従来技術とその問題点】ガラスのように硬度が高くか
つ脆性な材料を穿孔するのに、最も硬度が高いダイヤモ
ンド砥粒を採用した、いわゆるダイヤモンドドリルが奨
用されていることはよく知られるところである。しか
し、例えばドリルを高速回転させ、研削効率を向上させ
ようとすると、当然ながら摩擦熱が高じて高熱を発生
し、ダイヤモンドすなわちカーボン自体酸化し易く、消
耗が激しくなる。2. Description of the Related Art It is well known that so-called diamond drills, which employ diamond abrasive grains having the highest hardness, have been recommended for perforating hard and brittle materials such as glass. By the way. However, for example, when the drill is rotated at a high speed to improve the grinding efficiency, the frictional heat naturally increases to generate high heat, and the diamond, that is, the carbon itself is easily oxidized, and the wear becomes severe.
【０００３】他方高熱の発生を防ぐために、砥粒部への
冷却液の供給を工夫する手段も講じられているが、それ
のみでは基本的な解決手段にはならない。特開平4-2174
14号には、金属の穿孔に適したドリルであって、シャン
ク部と、これに分離可能に接合した平板型切刃部とを備
え、切刃部は少なくとも先端が立方晶窒化硼素焼結体か
らなる使い捨て式のドリルが開示されている。該焼結体
は炭化チタン、窒化チタン、炭化タングステン等ととも
に焼結される。ところで立方晶窒化硼素砥粒はダイヤモ
ンドに比べより高温に耐え得るが、単にそれを採用する
のみではやはり切削効率向上のうえで限界があり、冷却
液の供給、切削物の排出についての工夫が必要である。
また、炭化チタン、窒化チタン、炭化タングステン等高
い焼結温度を要する材料とともに焼結するのは容易とは
いえない。[0003] On the other hand, in order to prevent the generation of high heat, means for devising the supply of the cooling liquid to the abrasive grains have been taken, but this alone does not provide a basic solution. JP 4-2174
No. 14 is a drill suitable for drilling a metal, comprising a shank portion and a plate-shaped cutting blade portion separably joined to the shank portion, wherein the cutting blade portion has at least a tip of a cubic boron nitride sintered body. A disposable drill consisting of is disclosed. The sintered body is sintered together with titanium carbide, titanium nitride, tungsten carbide and the like. By the way, cubic boron nitride abrasive grains can withstand higher temperatures than diamond, but the mere adoption of them is still limited in terms of improving cutting efficiency, so it is necessary to devise ways to supply coolant and discharge cuttings. It is.
Further, it cannot be said that sintering with a material requiring a high sintering temperature such as titanium carbide, titanium nitride, and tungsten carbide is easy.
【０００４】本考案は前記公知例とは異なり、砥粒とし
ての窒化硼素と、高い軟化点ではあるが焼結し易いガラ
ス、結晶化ガラスや金属質の結合剤を用いて刃部を形成
し、冷却液の供給を工夫し、それらにより研削効率を向
上させたガラス穿孔具を提供するものである。According to the present invention, unlike the known example, the blade is formed by using boron nitride as abrasive grains, glass having a high softening point but easy to sinter, crystallized glass or a metallic binder. Another object of the present invention is to provide a glass piercing tool in which the supply of the cooling liquid is devised, and thereby the grinding efficiency is improved.
【０００５】[0005]
【問題点を解決するための手段】本発明は、シャンク先
端部に、先端側の切削刃部と根元側の研磨仕上刃部とか
らなる櫂型刃部を軸着し、シャンク中空孔を介し切削刃
部に冷却液を供給せしめる穿孔具であって、櫂型刃部が
立方晶窒化硼素砥粒と、金属質結合材料またはガラス質
結合材料を含んでなり、櫂型刃部内に前記シャンク中空
孔と交叉し、切削刃部切削面に冷却液を供給する横通孔
を、シャンク長手方向に沿って一ないし複数設け、横通
孔の給液孔は冷却液が刃先直前に斜め方向から噴射され
るように切削刃面の回転方向に対して極く手前の位置に
設けられていること、前記切削刃部の切削刃面、あるい
は更に研磨仕上刃部の仕上刃面に縦溝を刻成したこと、
更に前記研磨仕上刃部の仕上刃面を半円弧状に切欠い
て、穿孔後の孔の縁取り部を形成したこと、からなる。SUMMARY OF THE INVENTION According to the present invention, a paddle-shaped blade portion comprising a cutting blade portion on the tip side and a polishing finish blade portion on the base side is axially mounted on the tip of the shank, and the shank is formed through a hollow hole. A drilling tool for supplying a coolant to a cutting blade portion, wherein the paddle-shaped blade portion includes cubic boron nitride abrasive grains and a metallic binding material or a vitreous binding material, and the shank hollow is provided in the paddle-shaped blade portion. One or more transverse holes are provided along the longitudinal direction of the shank to supply coolant to the cutting surface of the cutting blade, intersecting with the holes. It is provided at a position very short with respect to the rotation direction of the cutting blade surface so that a vertical groove is formed on the cutting blade surface of the cutting blade portion, or further on the finishing blade surface of the polishing finish blade portion. Did
Further, the finishing blade surface of the polishing finishing blade portion is notched in a semicircular arc shape to form a rim portion of the hole after drilling.
【０００６】先述したようにドリルを高速回転させよう
とすると、摩擦熱が高じて高熱を発生するが、従来のダ
イヤモンド砥粒は約700 ℃においてダイヤモンドすなわ
ちカーボン自体酸化し消耗が激しくなるという弊害があ
る。他方立方晶窒化硼素砥粒はそれ自身の硬度はダイヤ
モンドに比べ稍劣るが、1000℃付近の高熱にも安定して
いる。さらに熱伝導率が高いので熱を放散し易く高速回
転による研削効率の向上に有効である。As described above, when the drill is rotated at a high speed, frictional heat is increased and high heat is generated. However, conventional diamond abrasive grains have a disadvantage that the diamond, that is, carbon itself is oxidized at about 700 ° C. and wear is severe. is there. On the other hand, cubic boron nitride abrasive grains are slightly inferior to diamond in their own right, but are stable to high temperatures around 1000 ° C. Further, since the thermal conductivity is high, heat is easily dissipated, which is effective for improving grinding efficiency by high-speed rotation.
【０００７】勿論結合剤や板状芯金もその熱に耐え、軟
化、溶解しないような材料を採用しなければならない。
芯金としては合金鋼等が、結合剤としてはSiO2-Al2O3-B
2O3R2O 系ガラス、ZnO-B2O3-SiO2-Al2O3 系ガラスセラ
ミックス、Co、Fe-Ni-Cr系等の金属質のものなどが推奨
できる。[0007] Of course, the binder and the sheet metal must also be made of a material that resists the heat and does not soften or melt.
Alloy steel etc. as the core metal, SiO 2 -Al 2 O 3 -B as the binder
2 O 3 R 2 O based glass, ZnO—B 2 O 3 —SiO 2 —Al 2 O 3 based glass ceramics, metallic materials such as Co and Fe—Ni—Cr based can be recommended.
【０００８】[0008]
【実施例】以下本考案を添付の図面に基づき説明する。
図１Ａ、Ｂは本考案にかかる穿孔具の斜視図であり、図
２Ａは別の態様にかかる斜視図、図２Ｂは図２ＡのＺ−
Ｚ線断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.
1A and 1B are perspective views of a piercing device according to the present invention, FIG. 2A is a perspective view according to another embodiment, and FIG.
It is a Z line sectional view.
【０００９】図１Ａ、Ｂにおいて1 はガラス穿孔具で、
図１Ａは比較的小口径、例えば20mm以下の孔を穿設する
ためのもの、図１Ｂはそれより大口径の孔を穿設するた
めのものである。2 は冷却液、例えば水やオイルを切削
刃部3 の先端に供給する中空孔4 を有するシャンクであ
り、5 は櫂型刃部で、切削刃部3 と研磨仕上刃部6 より
形成する。7 は縦溝、8 は縁取り部であり、図１Ｂに示
す9 は板状芯金で、大口径の孔を穿設するうえで、櫂型
刃部5 の横巾を大サイズとする場合において、切削研磨
に直接かかわらない部分に採用される。1A and 1B, reference numeral 1 denotes a glass drill.
1A is for drilling a hole having a relatively small diameter, for example, 20 mm or less, and FIG. 1B is for drilling a hole having a larger diameter. Reference numeral 2 denotes a shank having a hollow hole 4 for supplying a coolant, for example, water or oil, to the tip of the cutting blade 3. Reference numeral 5 denotes a paddle-shaped blade formed by the cutting blade 3 and the polishing finish blade 6. 7 is a vertical groove, 8 is a rim, and 9 shown in FIG. 1B is a plate-shaped metal core. When drilling a large-diameter hole, the width of the paddle-shaped blade 5 is set to be large. It is used for parts that are not directly involved in cutting and polishing.
【００１０】切削刃部3 と研磨仕上刃部6 は、例えばい
ずれも立方晶窒化硼素砥粒と前記した金属質またはガラ
ス質の結合剤を用いるもので、うち立方晶窒化硼素砥粒
の体積百分率は10vol%〜40vol%程度であるが、勿論これ
に限定するものではない。The cutting blade portion 3 and the polishing finish blade portion 6 use, for example, both cubic boron nitride abrasive grains and the above-mentioned metallic or glassy binder, and include a volume percentage of cubic boron nitride abrasive grains. Is about 10 vol% to 40 vol%, but is not limited to this.
【００１１】切削刃部3 および研磨仕上刃部6 を製造す
るには、立方晶窒化硼素砥粒と前記結合剤粉末を混合
し、所定形状に圧縮成形し、高温、あるいはさらに高圧
下で焼成すればよい。In order to manufacture the cutting blade portion 3 and the polishing finish blade portion 6, cubic boron nitride abrasive grains and the binder powder are mixed, compression-molded into a predetermined shape, and fired at a high temperature or further under a high pressure. I just need.
【００１２】砥粒粒度は適宜勘案し、採択すればよい
が、切削刃部3 において#60 〜150 、研磨仕上刃部6 に
おいて#150〜600 程度とする。縦溝7 と縁取り部8 の形
成については、本出願人が先に出願した実願平3-78511
号に詳述したので詳細は省略するが、縦溝7 は冷却液の
流通を助け、切削屑の排出、刃部の冷却にきわめて有効
であり、縁取り部8 は切削、研磨後のストレート孔の上
下端を改めて縁取りするのに適用される。The grain size of the abrasive grains may be appropriately selected and taken into consideration, but is set to about # 60 to 150 in the cutting blade section 3 and about # 150 to 600 in the polishing finish blade section 6. Regarding the formation of the flutes 7 and the edging portions 8, Japanese Patent Application No.
Although the details are omitted here, the vertical groove 7 assists the flow of the coolant, is extremely effective in discharging cutting chips and cooling the blade, and the rim 8 is used to cut and grind the straight hole. Applies to re-edge the upper and lower edges.
【００１３】横通孔10は、詳しくは図２Ａの斜視図、図
２Ｂの横断面図に示すように、切削刃部3 の切削刃面9
への冷却液の供給を良好にするために、切削刃部の内部
を横切り、シャンク中空孔と交叉して穿設する。該横通
孔10は単数またはシャンク長手方向に沿って複数配列す
る。特に図示のように、給液孔が切削刃面の極く手前(
回転方向に対して) に近在するようにすることにより、
冷却液が11、11のごとく噴射されて、切削刃面の冷却効
率を高めることができる。As shown in detail in the perspective view of FIG. 2A and the cross-sectional view of FIG. 2B, the horizontal through hole 10 has a cutting blade surface 9 of the cutting blade 3.
In order to improve the supply of the coolant to the cutting blade, the cutting blade is pierced across the inside of the cutting blade and crosses the shank hollow hole. The transverse through holes 10 are arranged singly or plurally along the longitudinal direction of the shank. In particular, as shown in the figure, the liquid supply hole is
By such that neighboring villages in the rotational direction),
The cooling liquid is injected like 11, 11, and the cooling efficiency of the cutting blade surface can be increased.
【００１４】前記横通孔の形成方法は、特定しないがウ
オータージェットによるもの、レーザー加工によるも
の、あるいは放電加工法を採用する等、適宜公知の手段
を採用すればよい。なお、 図１に示すように横通孔10を
穿設し、かつ縦溝7 により冷却液の流通を助長するよう
にすれば研削効率も格段と向上する。 The method of forming the horizontal through holes is not specified, but any known means such as water jet, laser processing, or electric discharge machining may be used. Incidentally, the Yokodori hole 10 as shown in FIG. 1
If the drilling is provided and the flow of the cooling liquid is promoted by the vertical grooves 7, the grinding efficiency is remarkably improved.
【００１５】本考案は以上のように構成されるもので、
例えば口径12mmφ用ドリルでガラスに穿孔する場合、従
来のダイヤモンドを採用したものは7000〜8000rpm の回
転が限界であるが、立方晶窒化硼素を採用した場合1000
0rpm以上の高速回転が可能であり、さらに縦溝を設け、
横通孔を配したものは12000rpmを越えることができる
等、研削効率において 3割ないし 5割以上の向上が認め
られる。The present invention is configured as described above.
For example, when drilling into glass with a 12 mm diameter drill, conventional diamonds are limited to rotations of 7000 to 8000 rpm, whereas cubic boron nitride is 1000
High speed rotation of 0 rpm or more is possible, and furthermore, a vertical groove is provided,
Grinding efficiency can be improved by 30% to 50% or more, for example, those with horizontal holes can exceed 12000 rpm.
【００１６】[0016]
【考案の効果】本考案によれば、従来のダイヤモンド砥
粒を採用した穿孔具に比べ研削効率を大幅に向上でき、
さらに縦溝と横通孔を配した構成においては研削効率が
格段と向上するという効果を奏する。[Effects of the Invention] According to the present invention, the grinding efficiency can be greatly improved as compared with a conventional piercing tool using diamond abrasive grains.
Further, in the configuration in which the vertical grooves and the horizontal through holes are arranged, there is an effect that the grinding efficiency is remarkably improved.
【図１】図１Ａ、Ｂは夫々本考案の斜視図である。FIGS. 1A and 1B are perspective views of the present invention.
【図２】図２Ａは別の態様にかかる斜視図、図２Ｂは図
２ＡのＺ−Ｚ線断面図である。2A is a perspective view according to another embodiment, and FIG. 2B is a cross-sectional view taken along the line ZZ of FIG. 2A.
【符号の説明】1 ----ガラス穿孔具 2 ----シャンク 3 ----切削刃部 4 ----中空孔 5 ----櫂型刃部 6 ----研磨仕上刃部 7 ----縦溝 8 ----縁取り部 10----横通孔[Explanation of Signs] 1 ---- Glass piercing tool 2 ---- Shank 3 ---- Cutting blade 4 ---- Hollow hole 5 ---- Ore type blade 6 ---- Polish finish Blade 7 ---- Vertical groove 8 ---- Border 10 ---- Horizontal through hole
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−161280（ＪＰ，Ａ) 特開 昭60−264208（ＪＰ，Ａ) 実開 昭62−167610（ＪＰ，Ｕ) 実開 平５−29614（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B23B 51/00 B23B 51/06 B24D 7/18──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-161280 (JP, A) JP-A-60-264208 (JP, A) JP-A-62-167610 (JP, U) JP-A-5-167610 29614 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) B23B 51/00 B23B 51/06 B24D 7/18
Claims (3)
元側の研磨仕上刃部とからなる櫂型刃部を軸着し、シャ
ンク中空孔を介し切削刃部に冷却液を供給せしめる穿孔
具であって、櫂型刃部が立方晶窒化硼素砥粒と、金属質
結合材料またはガラス質結合材料を含んでなり、櫂型刃
部内に前記シャンク中空孔と交叉し、切削刃部切削面に
冷却液を供給する横通孔を、シャンク長手方向に沿って
一ないし複数設け、横通孔の給液孔は冷却液が刃先直前
に斜め方向から噴射されるように切削刃面の回転方向に
対して極く手前の位置に設けられていることを特徴とす
るガラス穿孔具。1. A paddle-shaped blade portion comprising a cutting blade portion on a tip side and a polishing finish blade portion on a base side is axially mounted on a shank tip portion, and a coolant is supplied to the cutting blade portion through a shank hollow hole. a piercer, Ri name includes a paddle blade portion is cubic boron nitride abrasive grains, a metallic bond material or vitreous bond material, paddle blades
Crosses the shank hollow hole in the part, and
The transverse hole for supplying the cooling liquid extends along the shank longitudinal direction.
One or more holes are provided.
In the direction of rotation of the cutting blade so that it is sprayed from an oblique direction
A glass piercing tool provided at a position very short in front of the glass piercing tool.
上刃部の仕上刃面に縦溝を刻成したことを特徴とする請
求項１記載のガラス穿孔具。2. A glass piercer according to claim 1, characterized in that KokuNaru longitudinal grooves on the cutting blade surface, or even finish the blade surface of the polishing finish cutting portion of the cutting edge portion.
いて、穿孔後の孔の縁取り部を形成したことを特徴とす
る請求項１または２記載のガラス穿孔具。3. The glass drilling tool according to claim 1, wherein the finishing blade surface of the polishing finishing blade is cut out in a semicircular shape to form a rim of the hole after drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992075369U JP2581987Y2 (en) | 1992-10-29 | 1992-10-29 | Glass drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992075369U JP2581987Y2 (en) | 1992-10-29 | 1992-10-29 | Glass drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0639311U JPH0639311U (en) | 1994-05-24 |
| JP2581987Y2 true JP2581987Y2 (en) | 1998-09-24 |
Family
ID=13574238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992075369U Expired - Fee Related JP2581987Y2 (en) | 1992-10-29 | 1992-10-29 | Glass drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2581987Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022076183A (en) * | 2020-11-09 | 2022-05-19 | 株式会社ナノテム | Tool, diameter adjustment method, and drill |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0413128Y2 (en) * | 1986-04-15 | 1992-03-27 | ||
| JP3043782B2 (en) * | 1989-08-31 | 2000-05-22 | 株式会社不二越 | Tools for drilling hard and brittle materials |
-
1992
- 1992-10-29 JP JP1992075369U patent/JP2581987Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0639311U (en) | 1994-05-24 |
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