JPH01206004A - Drill for hard and brittle material - Google Patents
Drill for hard and brittle materialInfo
- Publication number
- JPH01206004A JPH01206004A JP63028909A JP2890988A JPH01206004A JP H01206004 A JPH01206004 A JP H01206004A JP 63028909 A JP63028909 A JP 63028909A JP 2890988 A JP2890988 A JP 2890988A JP H01206004 A JPH01206004 A JP H01206004A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- tip
- main body
- chisel point
- metal
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims description 26
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 30
- 239000010432 diamond Substances 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000006061 abrasive grain Substances 0.000 abstract description 8
- 238000005219 brazing Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 16
- 239000000919 ceramic Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- QGAYMQGSQUXCQO-UHFFFAOYSA-L eosin b Chemical compound [Na+].[Na+].O1C(=O)C2=CC=CC=C2C21C1=CC([N+]([O-])=O)=C([O-])C(Br)=C1OC1=C2C=C([N+]([O-])=O)C([O-])=C1Br QGAYMQGSQUXCQO-UHFFFAOYSA-L 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/31—Diamond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/75—Stone, rock or concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2240/00—Details of connections of tools or workpieces
- B23B2240/08—Brazed connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/50—Drilling tools comprising cutting inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はＳｉ３Ｎ４．ＳｉＣ等のセラミック焼結体、
大理石、花岡岩等の石材、タイル等の陶磁器材、その他
の硬脆材の穴明けに適したドリルの改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to Si3N4. Ceramic sintered bodies such as SiC,
This invention relates to the improvement of a drill suitable for drilling holes in stone materials such as marble and Hanaoka Rock, ceramic materials such as tiles, and other hard and brittle materials.
（従来の技術）
硬脆材の穴明加工には、第９図、第１０図に示すように
バイブロの先端にダイヤモンドコアチップ５を装着した
ダイヤモンドコアドリル、あるいは特開昭５６−１０７
８１３号公報及び第７図、第８図に示されるようにドリ
ル本体ｌにチゼルポイント４に向って一対の切刃３．３
を形成したチップ２であって超硬合金製のものを装着し
たものがあった。(Prior art) For drilling holes in hard and brittle materials, a diamond core drill with a diamond core tip 5 attached to the tip of a vibro, as shown in FIGS.
As shown in Publication No. 813 and FIGS. 7 and 8, a pair of cutting edges 3.3 are provided on the drill body l toward the chisel point 4.
There was a chip 2 that was formed with a cemented carbide material.
さらに、ツイストドリルの切刃部に立法品窒化硼素やダ
イヤモンド砥粒をメツキ・接着して単層のメツキ層を形
成したもの（実公昭５６−４１９５４号）もあった。Furthermore, there was also a twist drill whose cutting edge was plated and bonded with cubic boron nitride or diamond abrasive grains to form a single plating layer (Utility Model Publication No. 56-41954).
（発明が解決しようとする課題）
従来から、上述の如く硬脆材の穴明は加工には、ダイヤ
モンド・コアドリルあるいは超硬合金をドリルシャンク
先端に装着したドリルが使用されて来た。ダイヤモンド
・コアドリルには、冷却媒を導入したりあるいはコアを
取るための穴が設けられている。このため硬脆材に穿孔
する時にはセンターが定まらず、正確な位置及び口径が
得られない。そこで本体の先端に超硬質チップを取付け
たドリルが用いられている。かかるドリルでは回転ある
いは振動などを加えることが可能であるが、コンクリー
ト等の低硬度低密度材に対して、はぼ有効であるが、セ
ラミックス焼結体あるいは高密度タイル等の硬脆材に対
しては穿孔能率が著しく低下する。このことはセンター
を有するドリル刃先先端のチゼル部は、回転体中心部に
相当し、切削作用を果さないことに起因するのである。(Problems to be Solved by the Invention) Conventionally, a diamond core drill or a drill with a cemented carbide attached to the tip of the drill shank has been used to drill holes in hard and brittle materials as described above. Diamond core drills have holes for introducing coolant or removing cores. For this reason, when drilling into hard and brittle materials, the center cannot be determined and accurate position and diameter cannot be obtained. Therefore, a drill with an ultra-hard tip attached to the tip of the main body is used. Such drills can apply rotation or vibration, but are mostly effective against low hardness and low density materials such as concrete, but are not effective against hard and brittle materials such as ceramic sintered bodies or high density tiles. The drilling efficiency will be significantly reduced. This is because the chisel portion at the tip of the drill cutting edge, which has a center, corresponds to the center of the rotating body and does not perform any cutting action.
該先端部（チゼルポイント）は穴明は加工時に切削速度
が零か、極めてわずかであるために該部分は被切削物を
強引に押し潰すように作用して切屑を除去する。従って
、硬脆材のように硬い材料の穴明は加工では、被削物を
押し潰し切除する際には、強い切削抵抗により、チゼル
ポイント部が損傷し、ドリル寿命を著しく短かくしてい
た。Since the cutting speed of the tip (chisel point) during drilling is zero or extremely low, this portion acts to forcibly crush the workpiece to remove chips. Therefore, when drilling a hole in a hard material such as a hard brittle material, when crushing and cutting the workpiece, the chisel point is damaged due to strong cutting resistance, significantly shortening the life of the drill.
さらに、ツイスト・ドリルの切刃部にダイヤモンド砥粒
などを付着させたものでは、付着層が単層であるため、
再研磨が出来ず寿命が短い。しかも多層に付着させるこ
とは技術的に困難である。Furthermore, with twist drills that have diamond abrasive grains attached to the cutting edge, the adhesion layer is a single layer, so
It cannot be repolished and has a short lifespan. Moreover, it is technically difficult to adhere multiple layers.
（課題を解決するための手段）
本発明は、かかる課題を解決すべくなされたものであっ
て、後端に機械主軸に取付けられるシャンを有する本体
の先端に、本体の直径より幅広でかつチゼルポイントに
向って切刃を形成したメタルボンドダイヤモンド砥石製
チップを取付けたものであって、ダイヤモンド砥粒によ
る切刃が被削材中に食い込み、砥石の自生作用によって
次々に現出する切刃を常に連続的に作用させて高能率の
穴明は加工を可能とし、また、チゼルポイントを挟んで
その近傍に非切削ゾーンを設けることにより非切削ゾー
ンに生ずる切屑及び微少コアを同時に排出させる構造と
したものである。(Means for Solving the Problems) The present invention has been made to solve the above problems, and includes a chisel that is wider than the diameter of the main body at the tip of the main body and has a shank attached to the main shaft of the machine at the rear end. A metal bonded diamond grinding wheel tip with a cutting edge formed toward the point is attached, and the cutting edge made of diamond abrasive bites into the workpiece material, and the cutting edge that emerges one after another due to the self-sharpening action of the grinding wheel. High-efficiency drilling is possible by constantly operating the chisel point, and by providing a non-cutting zone in the vicinity of the chisel point, chips and minute cores generated in the non-cutting zone are simultaneously discharged. This is what I did.
（作 用）
この発明に係るドリルを用いて高脆材に穴明けするとメ
タルボンドダイヤモンド砥石の使用により、切削に作用
する先端部はダイヤモンドが摩耗すると結合材部である
メタルから剥離して、次々に切刃が出現する所謂自生作
用のため、常に砥粒が被削材に食い込み、連続的穿孔が
可能である。(Function) When drilling a hole in a highly brittle material using the drill according to the present invention, due to the use of a metal-bonded diamond grinding wheel, when the diamond wears out, the tip part that acts on cutting will peel off from the metal, which is the bonding material part, one after another. Because of the so-called self-growth effect in which cutting edges appear, the abrasive grains always bite into the work material, making continuous drilling possible.
これは穿孔条件によっても多少異なるが穿孔によって硬
脆材の切屑が生じこの切屑がメタルボンドダイヤモンド
砥石の表面を流れ結合材部をエロージョン的に浸食する
。このため次々に結合材中に含まれていた新らたな砥粒
が露出し切削に寄与する。Although this differs somewhat depending on the drilling conditions, drilling produces chips of the hard brittle material, which flow on the surface of the metal bond diamond grinding wheel and erode the bonding material portion in an erosive manner. Therefore, new abrasive grains contained in the binder are exposed one after another and contribute to cutting.
また、チゼルポイントの中心をはさんで直径線間に非切
削ゾーンを形成しているドリルは穴明は切削すると非切
削ゾーンに当る被削物は当然切削されないためコアとな
る。このコアは約２．０ ＊＊以下の径で形成されると
脆性材であるため穿孔に応じて成長、脱落を自然に繰返
し、切り屑と共に円周方向へ移動し排出される。Furthermore, if a drill forms a non-cutting zone between the diameter lines across the center of the chisel point, when a hole is drilled, the workpiece that falls in the non-cutting zone will not be cut, so it will become the core. If this core is formed with a diameter of about 2.0** or less, it is a brittle material, so it will naturally repeat growth and fall off as the hole is drilled, and it will move along with the chips in the circumferential direction and be discharged.
（実施例）
次に本発明の実施例を図面について説明すると、第１図
及び第２図には長平方向に一対のねじれ溝７を形成し、
後端に機械主軸に取付けられるシャンクを有する本体１
の先端にねじれ溝７．７を挟んで対称の位置にスリット
８が形成され、該スリットにメタルボンドダイヤモンド
砥石製のチップ９をロー付けにより固定したドリルが示
される。(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a pair of twisted grooves 7 are formed in the elongated direction,
Main body 1 having a shank attached to the machine main shaft at the rear end
A drill is shown in which a slit 8 is formed at a symmetrical position with a twisted groove 7.7 in between, and a tip 9 made of a metal bond diamond grindstone is fixed to the slit by brazing.
該メタルボンドダイヤモンド砥石製チップは、本体１の
中心線上にチゼルポイント４が位置するように組込まれ
、さらにチゼルポイントに向けて切刃３，３が形成され
ると共に、切刃に面取り１０が施されていて芯出しの安
定をはかっている。The metal bond diamond grinding wheel tip is assembled so that the chisel point 4 is located on the center line of the main body 1, and cutting edges 3, 3 are formed toward the chisel point, and a chamfer 10 is applied to the cutting edge. This ensures stable centering.
第３図及び第４図に示す実施例はチゼルポイントを挟ん
でその近傍に非切削ゾーン１０を形成したものであり、
該非切削ゾーンは幅０．５ ｕ〜２．０ｍｍ程度であり
、チップ９に長平方向に凹み状に形成されている。In the embodiment shown in FIGS. 3 and 4, a non-cutting zone 10 is formed in the vicinity of the chisel point.
The non-cutting zone has a width of about 0.5 mm to 2.0 mm, and is formed in the shape of a recess in the longitudinal direction of the chip 9.
第５図、第６図に示された実施例では、２枚のチップが
チインポイント４付近を挟んで対称の位置に穿設された
２本のスリット８．８に各チップ９が挿入され、ロー付
けにより固定されて、非切削ゾーン１０が形成されたも
のである。In the embodiment shown in FIGS. 5 and 6, each chip 9 is inserted into two slits 8.8 that are bored at symmetrical positions with the two chips sandwiching the vicinity of the chi-in point 4. It is fixed by brazing to form a non-cutting zone 10.
なお、メタルボンドダイヤモンド砥石製チップ９は上述
の各実施例においては、いずれもロー付けにより本体の
スリット８に固着されているが、これに代えてメカニカ
ルクランプ等適宜の手段を用いることができることは言
うまでもない。In addition, in each of the above-mentioned embodiments, the metal bond diamond grinding wheel tip 9 is fixed to the slit 8 of the main body by brazing, but it is possible to use an appropriate means such as a mechanical clamp instead of this. Needless to say.
なお、被削材の性質等によって、ダイヤモンド砥粒の品
位、粒度及び配合量（集中度）を変えたり、これを結合
する金属粉末も、種々に変えることができる。特にダイ
ヤモンドの粒度としては４０〜２７０メツシユの範囲の
ものがよく、ブロッキーな強い砥粒が有効である。量と
しては１０〜５０ｖｏ１％の範囲でその有効性が認めら
れた。Note that, depending on the properties of the work material, etc., the quality, particle size, and amount (concentration) of the diamond abrasive grains can be changed, and the metal powder used to bind them can also be changed. In particular, the diamond grain size is preferably in the range of 40 to 270 mesh, and blocky strong abrasive grains are effective. Its effectiveness was recognized in the range of 10 to 50 vol%.
（試験例Ｉ）
Ｎｉ、 Ｃｏ、 Ｃｕ合金などの粉末に６０／８０メツ
シユの人工ダイヤモンドを集中度５０ （１２，５ｖｏ
１％）で混合し、これを減圧雰囲気中にて８６０ ’ｃ
で１０分間焼結して、作成したメタルポンドダイヤモン
ドチップを、円柱状捩れ溝を有する工具保持体（ＳＫＩ
＋ ５１ ）にロー付して第１図、第２図に示すドリル
を製作した。この本発明に係るドリルと従来の超硬付ド
リル（第７図、第８図）を用いて以下の条件に穴明は試
験をしたところ、第１１図に示す結果を得た。(Test Example I) A 60/80 mesh artificial diamond was added to powders such as Ni, Co, and Cu alloys at a concentration level of 50 (12,5vo
1%) and heated at 860'c in a reduced pressure atmosphere.
The metal pound diamond tip was sintered for 10 minutes in a tool holder (SKI) with a cylindrical twist groove.
+51) was brazed to produce the drill shown in Figs. 1 and 2. A drilling test was conducted under the following conditions using the drill according to the present invention and a conventional drill with carbide (FIGS. 7 and 8), and the results shown in FIG. 11 were obtained.
ドリル径 ：５ｍ／ｍ
被削材 ： 硬質磁器タイル（ＡＴ −２Ｙ１２１）厚
み２３ｍ／ｍ
回転数 ： １６００ ｒｐｍ
送り速度 ： ２０ｍｍ／ｍｉｎ
縦型ポール般を使用
尚従来の超硬付ドリルでは回転のみの場合と、これに振
動を付加した場合について比較した。本発明ドリルは、
回転のみの場合である。Drill diameter: 5m/m Workpiece material: Hard porcelain tile (AT-2Y121) thickness 23m/m Rotation speed: 1600 rpm Feed rate: 20mm/min Vertical pole is generally used; conventional carbide drills only rotate A comparison was made between the case where vibration was applied and the case where vibration was added to this case. The drill of the present invention is
This is a case of only rotation.
（試験例２）
試験例１に示すと同様の方法によって作成し、形状を第
５図、第６図に示す形にドリルを製作した本発明に係る
ドリルと従来のダイヤモンドコアドリル（第９図、第１
０図）を、以下の条件にて厚み１０ｍ／ｍを穴明けした
ところ、第１表に示す結果を得た。(Test Example 2) A drill according to the present invention was prepared by the same method as shown in Test Example 1 and had a shape shown in Figs. 5 and 6, and a conventional diamond core drill (Figs. 9 and 6). 1st
When a hole was drilled to a thickness of 10 m/m under the following conditions, the results shown in Table 1 were obtained.
ドリル径 ：５ｍ／ｍ
被削材 ： Ａｌ２Ｏ３（１０ｘ５０ｘ１００）、比
重３．９ 、Ｈｖ （１６００〜２０００）回転数 ：
１０００ ｒｐｍ
荷 重 ：１５ｋｇ
第 １ 表
上表より、本発明ドリルは、従来のダイヤモンドコアド
リルに比較して、高能率に穴明けが可能であり、長寿命
であることがわかる。また喰い付きも極めて安定してい
る。Drill diameter: 5m/m Work material: Al2O3 (10x50x100), specific gravity 3.9, Hv (1600-2000) Rotation speed:
1000 rpm Load: 15 kg Table 1 From the above table, it can be seen that the drill of the present invention can drill holes with high efficiency and has a long life compared to the conventional diamond core drill. Also, the bite is extremely stable.
（試験例３）
Ｎｉ、 Ｃｏ、 Ｃｕ合金などの粉末に、１００／１２
０メツシユの人工ダイヤを集中度７５ （ｖｏｌ １８
．７５％）で混合し、これを減圧中で１０分間焼結して
成形したチップを取付けて第５、第６図のように形成し
た本発明ドリルにおいて、メタルボンドダイヤモンド砥
石刃先半径（ｒ、）を５ｍ／ｍ、非切削ゾーンノ巾（ｒ
ｌ）を０．２．０．５． １．０． ２．０゜２．５と
変化させ、これに対応して各々シャンク半径（ｒ２）を
ｒ３−ｒ、＝≧ｒ１の条件において作成したドリルを用
いて以下の被削材及び条件にて穿孔試験をし、切屑及コ
アの排出の可否を調べたところ、第２表に示す結果を得
た。(Test Example 3) 100/12 was applied to powders such as Ni, Co, and Cu alloys.
0 mesh artificial diamond concentration level 75 (vol 18
．． 75%) and sintered it under reduced pressure for 10 minutes to form a molded chip.In the drill of the present invention, the metal bonded diamond grinding wheel cutting edge radius (r,) was attached as shown in Figures 5 and 6. 5 m/m, the width of the non-cutting zone (r
l) to 0.2.0.5. 1.0. 2.0°2.5, and the shank radius (r2) was changed to r3-r, = ≧ r1 using drills prepared under the following workpiece materials and conditions: When examining whether chips and cores could be discharged, the results shown in Table 2 were obtained.
被削材
−ｉｎｎツタイルＡＴ−２Ｙ／１２１． ＩＮＡＸ）・
セラミックス（Ａｌ２ ｚ（ｈ）
・石 材（赤御影石、インド産ニューインペリアルレッ
ド）
穿孔条件
・主軸回転数 ７００〜２００Ｏｒｐｍ・ 送
リ ５１層／’ｍ ｉ ｎ第
２ 表
切屑及コアの排出の状況
、 非切削ゾーンの巾（ｒ、）が、０．２ｍ／ｍ以下
の時は磁器タイルやセラミックスのような焼成品は生成
した微細コアが、チゼルポイント４近傍に付着して、焼
付を生じやすくなる。また２、５ｍ／ｍ以上となるとコ
アが折れにくくなり、コアの排出が困難になってくる。Work material - inn Tsutile AT-2Y/121. INAX)・
Ceramics (Al2z(h) / Stone (red granite, New Imperial Red from India) Drilling conditions / Spindle rotation speed 700-200Orpm / Feed
51st layer/'minth layer
2 Status of discharge of surface chips and cores. When the width of the non-cutting zone (r,) is less than 0.2 m/m, fine cores generated in fired products such as porcelain tiles and ceramics are located near chisel point 4. It adheres to the surface and tends to cause seizure. Moreover, if the thickness exceeds 2.5 m/m, the core becomes difficult to break, making it difficult to discharge the core.
したがってｒ、は概ね０．５ｍ／ｍ〜２．０ｍ／ｍが良
好である。Therefore, r is preferably approximately 0.5 m/m to 2.0 m/m.
（効 果）
本発明は、上述のように結合力が強く、剛性の高いメタ
ルボンドダイヤモンド砥石製のチップをドリル本体に取
付けたので、砥石の自生作用によってダイヤモンド砥粒
による切刃が被削材中に食い込んで常に連続的に作用す
る。ことになり、連続的穿孔が可能となり、穿孔能率を
飛躍的に向上させることができる。(Effects) As described above, in the present invention, a tip made of a metal bonded diamond grinding wheel with strong bonding force and high rigidity is attached to the drill body, so that the cutting edge made by the diamond abrasive grains can cut into the workpiece due to the self-sharpening action of the grinding wheel. It bites into the body and acts continuously. As a result, continuous drilling becomes possible, and drilling efficiency can be dramatically improved.
さらに、チゼルポイントを挟んで非切削ゾーンを設けた
ので、喰い込みは中心軸に対し対称の２箇所の切刃が存
在することにより、芯出しの滑り防止に貢献し、穴明け
が用意となる、など多くの顕著な効果を奏する。Furthermore, since a non-cutting zone is provided across the chisel point, there are two cutting edges symmetrical about the center axis, which contributes to preventing slippage during centering and makes drilling easier. , and many other remarkable effects.
第１図は本発明の実施例の部分正面図、第２図は第１図
のものの側面図、第３図は他の実施例の部分正面図、第
４図は同じく側面図、第５７図は更に他の実施例の部分
正面図、第６図は同じく側面図、第７図は従来品の部分
正面図、第８図は同じく側面図、第９図は従来のコアド
リルの部分正面図、第１Ｏ図は同じく側面図、第１１図
は本発明に係るドリルと従来品との穴明は本数の比較図
である。
■・・・本体、３・・・切刃、４・・・チゼルポイント
、９・・・メタルボンドダイヤモンド砥石製チップ、１
０・・・非切削ゾーン。
代理人 弁理士 河 内 潤 二
篤 １ 図
第 ３ 口
第 ５ 口
第 ７ 図
￥）９ 口
超ま付ドリル ドリル
手続補正書
昭和６３年 ６月ゲ 日 ８角討こFIG. 1 is a partial front view of an embodiment of the present invention, FIG. 2 is a side view of the embodiment shown in FIG. 1, FIG. 3 is a partial front view of another embodiment, FIG. 4 is a side view of the same, and FIG. is a partial front view of another embodiment, FIG. 6 is a side view, FIG. 7 is a partial front view of a conventional product, FIG. 8 is a side view, and FIG. 9 is a partial front view of a conventional core drill. FIG. 1O is a side view, and FIG. 11 is a comparison diagram of the number of holes drilled between the drill according to the present invention and the conventional drill. ■...Body, 3...Cutting blade, 4...Chisel point, 9...Metal bond diamond grinding wheel tip, 1
0...Non-cutting zone. Agent Patent Attorney Jun Kawauchi Futatsu 1 Diagram 3 Portion 5 Portion 7 Diagram ￥) 9 Drill with Drill Procedure Amendment Form June 1988, 8th Round
Claims (3)
先端に、本体の直径より幅広で、かつチゼルポイントに
向って切刃を形成したメタルボンドダイヤモンド砥石製
チップを取付けた硬脆材用ドリル。(1) A drill for hard and brittle materials that has a metal bonded diamond grindstone tip that is wider than the diameter of the main body and has a cutting edge formed toward the chisel point, attached to the tip of the main body that has a shank that is attached to the main shaft of the machine.
を挟んでその近傍に非切削ゾーンを形成した特許請求の
範囲第１項記載の硬脆材用ドリル。(2) The drill for hard and brittle materials according to claim 1, wherein a non-cutting zone is formed in the vicinity of the chisel point of the diamond grindstone tip.
トを中心に約０．５ｍｍ乃至２．０ｍｍである特許請求
の範囲第３項記載の硬脆材用ドリル。(3) The drill for hard and brittle materials according to claim 3, wherein the width (r_1) of the non-cutting zone is about 0.5 mm to 2.0 mm around the chisel point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028909A JPH01206004A (en) | 1988-02-12 | 1988-02-12 | Drill for hard and brittle material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028909A JPH01206004A (en) | 1988-02-12 | 1988-02-12 | Drill for hard and brittle material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01206004A true JPH01206004A (en) | 1989-08-18 |
Family
ID=12261531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63028909A Pending JPH01206004A (en) | 1988-02-12 | 1988-02-12 | Drill for hard and brittle material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01206004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0599596A1 (en) * | 1992-11-24 | 1994-06-01 | De Beers Industrial Diamond Division (Proprietary) Limited | Drill bits |
| JP2007175967A (en) * | 2005-12-27 | 2007-07-12 | Shinetsu Quartz Prod Co Ltd | Method for processing inside hole of hollow brittle material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626928A (en) * | 1985-06-27 | 1987-01-13 | 積水化学工業株式会社 | Sewing yarn |
-
1988
- 1988-02-12 JP JP63028909A patent/JPH01206004A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626928A (en) * | 1985-06-27 | 1987-01-13 | 積水化学工業株式会社 | Sewing yarn |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0599596A1 (en) * | 1992-11-24 | 1994-06-01 | De Beers Industrial Diamond Division (Proprietary) Limited | Drill bits |
| US5464068A (en) * | 1992-11-24 | 1995-11-07 | Najafi-Sani; Mohammad | Drill bits |
| JP2007175967A (en) * | 2005-12-27 | 2007-07-12 | Shinetsu Quartz Prod Co Ltd | Method for processing inside hole of hollow brittle material |
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