JPS5981011A - Rotary core drill equipped with grindstone blade - Google Patents
Rotary core drill equipped with grindstone bladeInfo
- Publication number
- JPS5981011A JPS5981011A JP18992782A JP18992782A JPS5981011A JP S5981011 A JPS5981011 A JP S5981011A JP 18992782 A JP18992782 A JP 18992782A JP 18992782 A JP18992782 A JP 18992782A JP S5981011 A JPS5981011 A JP S5981011A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- core drill
- grindstone
- drilling
- grinding wheel
- 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
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 5
- 239000010432 diamond Substances 0.000 claims abstract description 5
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000000701 coagulant Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000004663 powder metallurgy Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 30
- 239000004567 concrete Substances 0.000 abstract description 7
- 239000004575 stone Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000005219 brazing Methods 0.000 abstract 1
- 230000007717 exclusion Effects 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000009527 percussion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
-
- 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
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
- B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は主としてコンクリート、ＩＩ！１！ｌＩ５コ
ンクリート、石材等に、大径孔を穿孔するための砥石刃
を有する回転式コアドリルをご開するものである。[Detailed Description of the Invention] This invention mainly relates to concrete, II! 1! This is a rotary core drill equipped with a grindstone blade for drilling large diameter holes in concrete, stone, etc.
従来、コンクリートや右利等の穿孔作業においては超硬
合金片により形成した穿孔刃を有する回転打撃式コアド
リルが一般に使用されているが、この回転打撃式コアド
リルによる穿孔作業では、極めて大きい穿孔音を発する
ので周囲ｔご迷惑を及ぼし、またコアドリルの打撃振動
が作業者に作用するので、作業者の疲労度が大きいとい
コ欠点があった。そこで、従来よりガラス板の穿孔作業
で使用されているダイヤモンド等の砥石刃を有するコア
ドリルにより、コアドリルを回転させてフンクリートや
石材等ｔこ対する穿孔を行なえば穿孔音が静かη上ｔこ
作業者の疲労が少なく、Ｌかも穿孔の仕上りもよいこと
がわかった。Conventionally, a rotary percussion type core drill with a drilling blade made of a piece of cemented carbide has been generally used for drilling work in concrete, right-handed materials, etc., but this rotary percussion type core drill produces extremely loud drilling noise. This causes a nuisance to the surrounding area, and the impact vibration of the core drill acts on the worker, which has the disadvantage of causing great fatigue to the worker. Therefore, if a core drill with a diamond or other abrasive blade, which has been conventionally used for drilling glass plates, is used to rotate the core drill and drill into concrete, stone, etc., the drilling noise will be quieter. It was found that there was less fatigue and the finish of L-shaped holes was also good.
しかし、ガラス板の穿孔作業をこ採用されている従・米
のこの種コアドリルは、第１図に示すように、′Ｔ一端
を開口した円筒形のコアドリル本体（１）下端周縁ｔこ
、その円ＦＪに合わせて円弧状に形成した広幅のダイヤ
モンド砥石刃（５）を間隔を設けて突設した構造からな
っていたが、この構造の場合には、コアドリル本体（１
）の口径が異なると、これに対応して砥石刃（５）の円
弧形状を変更する必要があるため、砥石刃焼結用型材を
何種ラコ１も用、けＬ−ｒ於かねばならηい等、製造上
非常１こ不便で、かつ不経済であった。また、砥石刃（
５）の幅が広いため、各砥石刃（５）前端部の切削によ
り生じｆｃ ＵＪ削屑がそのｖ！、部寄りに溜つ゛Ｃ切
削屑の排出がスノ・−ズに行プわれにくいので切削効率
が悪い七いう欠点があった。However, as shown in Figure 1, this type of core drill used for drilling glass plates has a cylindrical core drill body (1) with one end open. It consisted of a structure in which wide diamond grinding wheel blades (5) formed in an arc shape according to the circle FJ were protruded at intervals, but in the case of this structure, the core drill body (1
) is different in diameter, it is necessary to change the arc shape of the grinding wheel blade (5) accordingly, so it is necessary to use several types of shape materials for sintering the grinding wheel blade (L-r). This was extremely inconvenient and uneconomical in manufacturing. In addition, the whetstone blade (
5) is wide, so the fc UJ chips generated by cutting the front end of each grinding wheel blade (5) are wide. However, there is a drawback that the cutting efficiency is poor because it is difficult for the snow to discharge the cutting waste that accumulates near the part.
更に、ガラス板に対する砥石刃（５）による穿孔作業に
あっては、ガラス板自体が薄いため要求される穿孔深さ
が浅く、またガラス板の相貫からして冷却水を１＝より
砥石刃を冷却」、て発熱を小さく１−てやれば、従来の
砥石刃付きコアドリルにより満足のいく穿孔作業が行な
えるが、被穿孔体がコンクリ−１・・や石材等になると
、要求さノＬる穿孔深さがガラス板よりはかなり深くｉ
す。Furthermore, when drilling a glass plate with the grindstone blade (5), since the glass plate itself is thin, the required drilling depth is shallow, and because of the mutual penetration of the glass plate, cooling water is A conventional core drill with a grindstone blade can perform satisfactory drilling work if the heat generated by cooling is kept small. However, when the object to be drilled is concrete, stone, etc. The drilling depth is considerably deeper than that of a glass plate.
vinegar.
かつ被ｊｌＦ孔体の材質からして砥石刃自体の強度を大
きくする必要があっ九〇
仁の発Ｌｌ１１は上述の点に鑑みなされたもので。In addition, it is necessary to increase the strength of the whetstone blade itself due to the material of the holed body, and the 90-nin design Ll11 was created in view of the above points.
従来の砥石刃を有するコアドリルの欠点を解消１−てコ
ノクリート・や石ｄ等に対しスムーズな穿孔作業が行な
い得る砥石刃付き回転式コアドリルを提供しようとする
ものでろる。The present invention aims to eliminate the drawbacks of conventional core drills with a grindstone blade and provide a rotary core drill with a grindstone blade that can perform smooth drilling work on conocrete, stone, etc.
以下、この発明の実施例を第２図および第８図に基いて
説明する。Embodiments of the present invention will be described below with reference to FIGS. 2 and 8.
（１）は下端を開口した円筒形のコアドリル本体で、こ
の本体（１）の上端には回転式の穿孔機に接続するため
のシャンク（図示せず）が設けられる。そして、本体（
１）の側周壁下端部に下端を開放したスリット状の切削
屑排出孔（２）を円周方向に間隔を設けて開設し、各排
出孔（２）間に形成さ凹所（４）を開設する。(1) is a cylindrical core drill body with an open lower end, and a shank (not shown) for connecting to a rotary drilling machine is provided at the upper end of this body (1). Then, the main body (
Slit-shaped cutting waste discharge holes (2) with open lower ends are opened at the lower end of the side peripheral wall of 1) at intervals in the circumferential direction, and recesses (4) are formed between each discharge hole (2). Open.
（５）はダイヤモンド等の粉粒体を粉末冶金等の凝結剤
とともに焼結用型材を用いて焼結し、縦長の角柱状に形
成した砥石刃で、この砥石刃（５）は前記凹所（４）内
に嵌挿されてロク付けされる。(5) is a grinding wheel blade formed into a vertically long prismatic shape by sintering powder or granules such as diamond together with a coagulant such as powder metallurgy using a sintering mold material, and this grinding wheel blade (5) is formed into a vertically long prismatic shape. (4) It is inserted into the inside and locked.
なお、砥石刃（５）を保持する刃体部（３）の厚みは砥
石刃（５）の厚みより簿＜Ｌ、例えば刃体部（３）厚を
０・５ｍｍとし砥石刃（５）厚を１・θ〜２・Ｑｍｍと
する。Note that the thickness of the blade body (3) that holds the whetstone blade (5) is less than the thickness of the whetstone blade (5), for example, if the thickness of the blade body (3) is 0.5 mm, the thickness of the whetstone blade (5) is is 1·θ to 2·Qmm.
そして、上記の如く構成した実施例のコアドリルの使用
は１回転式穿孔機に接続してコアドリルを回転させ、か
つ本体（１）下端の砥石刃（５）に注水して冷却りなが
ら目的の被穿孔体に穿孔作業を行なうものである。また
、この穿孔作業の同１回転する各砥石刃（６）によシ被
穿孔体の９孔予定線に沿って削り作業がなされ、また穿
孔作業の進行にイｆなって砥石刃（５）下端が摩耗Ｌ％
同時に刃体部（３） ”Ｆ ？ＩＭも砥石刃（５）Ｔ一
端と面一となるように摩耗されながら、切削屑が排出孔
（２）よシ排出逼れ、穿孔作業が継続する。The core drill of the embodiment configured as described above is used by connecting it to a single-rotation type drilling machine, rotating the core drill, and cooling it by pouring water into the grinding wheel blade (5) at the lower end of the main body (1). This is to perform drilling work on a perforated body. In addition, each grinding wheel blade (6) rotating at the same time during this drilling operation performs a grinding operation along the 9-hole planned line of the object to be drilled, and if the drilling operation progresses, the grinding wheel blade (5) Lower end wears L%
At the same time, the blade part (3) ``F?IM'' is also worn flush with one end of the grinding wheel blade (5) T, while the cutting waste is discharged through the discharge hole (2) and the drilling operation continues.
次に、第４図および第５図はこの発明の第２実施例を示
し、前記第゛１実施例に比べてコアドリル本体（１）の
強度向上を図るために刃体部（３）の厚みをやや厚くす
るＬ共に、砥石刃（５）は刃体部（８）の回転方向喘に
設け、また、切削Ｎ排出孔（２）はオ休（１）側周壁の
外面のみを削成した溝構造きして本体（１）の下端周縁
を連続させている。Next, FIGS. 4 and 5 show a second embodiment of the present invention, in which the thickness of the blade part (3) is increased in order to improve the strength of the core drill body (1) compared to the first embodiment. For both L and L, the grinding wheel blade (5) is provided in the rotational direction of the blade body (8), and the cutting N discharge hole (2) is cut only on the outer surface of the side peripheral wall of the hole (1). A groove structure is used to make the lower end periphery of the main body (1) continuous.
更に、第６図および第７図はこの発明の第８実施例を示
し、コアドリル本体（１）の強度向上を図る七共に、各
砥石刃（５）への冷却水のまわりをよくするために、第
２実施例の措造において。Furthermore, FIGS. 6 and 7 show an eighth embodiment of the present invention, in which the strength of the core drill body (1) is improved and the cooling water is distributed to each grinding wheel blade (5) in a better manner. , in the construction of the second embodiment.
前記排出孔（２）としての溝壁の適所に第１実施例の排
出孔（２）と同様のスリット状排出孔（２）を開設して
いる。A slit-shaped discharge hole (2) similar to the discharge hole (2) of the first embodiment is provided at a suitable location on the groove wall as the discharge hole (2).
以上説１３１１したよつに、この発明めへ砥石刃付き回
転式コアドリルは、本体下端ｔこ開設した凹所に、砥石
刃の下端が木休下端り面一になるように一致させて砥石
刃を埋設し、砥石刃をその両側の本体周壁により保持し
て、砥石刃の強度を向上り、穿孔作業に際しては砥石刃
の摩耗に従ってオ体周壁下ｆ＋Ｍを摩耗させることによ
り行な９ようにしたから、コンクリート、鉄筋コンクリ
ート、石材等に対する穿孔作業において、砥石刃部位を
冷却水によシ冷却することが必要に・ηるが、ｉ転式の
コアドリルによる穿孔作業が可能となり、しかも従来の
超硬合金刃を備えた回転打撃式コアドリルによる穿孔作
業に比べて、作業が著しく静かで作業者の疲労も少なく
、また穿孔効率が高いので穿孔時間が短縮され、仕上り
の美Ｌｚ？孔を得ることができるほか、コアドリル本体
の下端に広幅の砥石刃を突設した従来のガラス板穿孔用
コアドリルに比べて、砥石刃に冷却水が十分にいきわた
り冷却効果が高く、切削屑の参ト出がスムーズで％穿孔
効率が向上り、ｔた本体の口径を変Ｊ！シても砥石刃の
形状を変更する必要がなく、一種類の砥石刃を共通して
利用できるため、経済的で製造コストをＴげることがで
きる等の効果を奏する。In accordance with the above theory, the rotary core drill with a grinding wheel blade of the present invention is provided by aligning the lower end of the grinding wheel blade with the recess opened at the lower end of the main body so that the lower end of the grinding wheel blade is flush with the lower end of the grinding wheel. was buried, and the grindstone blade was held by the peripheral walls of the main body on both sides to improve the strength of the grindstone blade, and during drilling work, the lower part of the peripheral wall f+M of the body was worn out in accordance with the wear of the grindstone blade.9 Therefore, when drilling into concrete, reinforced concrete, stone, etc., it is necessary to cool the grinding wheel blade with cooling water. However, it is now possible to perform drilling work with an i-rotation type core drill, and it is possible to perform drilling work using a conventional carbide core drill. Compared to drilling with a rotary percussion type core drill equipped with an alloy blade, the work is much quieter, reduces worker fatigue, and the drilling efficiency is high, reducing drilling time and producing a beautiful finish. In addition to being able to obtain holes, compared to conventional core drills for drilling glass plates, which have a wide grinding wheel protruding from the bottom end of the core drill body, cooling water is sufficiently distributed to the grinding wheel blade, which has a high cooling effect and reduces the amount of cutting debris. Smooth ejection, improved drilling efficiency, and the ability to change the diameter of the main body! There is no need to change the shape of the grindstone blade even if the grindstone blade is used, and one type of grindstone blade can be used in common, so it is economical and the manufacturing cost can be reduced.
第１図は従来の一般的耽砥石刃付きコアドリルの部分斜
視図、第２図はこの発明の第１実施例を示す部分正面図
、第８図は第２図の底端面図、・第４図はこの発明の第
２実施例を示す部分正面図、第５図は第４図の底端面図
、第６図はとの発明の第８実施例を示す部分正面図、第
７図は第６図の底端面図である。
（１）・・コアドリル本体、（２）（２５・・切削屑排
出孔、（３）・・刃体部、（４）・・凹所、（６）・◆
砥石刃。
記１１図
を乙、７
ｒ５図
戚２図
紙６１図
ケア図Fig. 1 is a partial perspective view of a conventional general core drill with a grindstone blade, Fig. 2 is a partial front view showing a first embodiment of the present invention, Fig. 8 is a bottom end view of Fig. 2, and Fig. 4 The figure is a partial front view showing a second embodiment of the invention, FIG. 5 is a bottom end view of FIG. 4, FIG. 6 is a partial front view showing an eighth embodiment of the invention, and FIG. FIG. 6 is a bottom end view of FIG. 6; (1) Core drill body, (2) (25 Cutting waste discharge hole, (3) Blade body, (4) Recess, (6) ◆
Whetstone blade. Figure 11 is shown in Figure 7, R5 Figure 2, Figure 61, Care Diagram.
Claims (1)
焼結して定形化した砥石刃を下端関口の円筒形のコアド
リル本体’Ｆｔ＠に設けたコアドリルにおいて、前記砥
石刃を縦長の角柱状に形成し、該砥石刃に対応して本体
の下端部周壁に下端開放の凹所を円周方向に間隔を設け
て開設し、該凹所に前記砥石刃の下端を本体下ｍｌと一
致さ−Ｕて埋設したことを特徴とする砥石刃付き回転式
コアドリル。In a core drill in which a cylindrical core drill body 'Ft@, which is formed by sintering a powder or granular material such as diamond with a coagulant such as powder metallurgy and is shaped into a regular shape, is provided in a cylindrical core drill body 'Ft@ at the lower end Sekiguchi, the said grindstone blade is shaped into a vertically elongated prismatic shape. A recess with an open lower end is provided at intervals in the circumferential direction on the peripheral wall of the lower end of the main body corresponding to the grinding wheel blade, and the lower end of the grinding wheel blade is placed in the recess so as to be aligned with the lower ml of the main body. A rotary core drill with a grindstone blade, which is characterized by a U-buried surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18992782A JPS5981011A (en) | 1982-10-27 | 1982-10-27 | Rotary core drill equipped with grindstone blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18992782A JPS5981011A (en) | 1982-10-27 | 1982-10-27 | Rotary core drill equipped with grindstone blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5981011A true JPS5981011A (en) | 1984-05-10 |
Family
ID=16249534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18992782A Pending JPS5981011A (en) | 1982-10-27 | 1982-10-27 | Rotary core drill equipped with grindstone blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5981011A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199349U (en) * | 1985-05-30 | 1986-12-13 | ||
| US4966502A (en) * | 1988-07-20 | 1990-10-30 | Hilti Aktiengesellschaft | Hollow drilling tool |
| KR100693722B1 (en) | 2005-04-04 | 2007-03-12 | 김선중 | Stainless Shank Dimond Core Drill For Automobile Safety Glass |
| WO2013053545A1 (en) * | 2011-10-13 | 2013-04-18 | Robert Bosch Gmbh | Hammer core bit |
| WO2020113798A1 (en) * | 2018-12-05 | 2020-06-11 | 江苏锋菱超硬工具有限公司 | Long-service-life ultrathin sintering brazing hole drill for drilling of military armored kevlar layer and production process therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4820079B1 (en) * | 1968-04-10 | 1973-06-18 |
-
1982
- 1982-10-27 JP JP18992782A patent/JPS5981011A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4820079B1 (en) * | 1968-04-10 | 1973-06-18 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199349U (en) * | 1985-05-30 | 1986-12-13 | ||
| US4966502A (en) * | 1988-07-20 | 1990-10-30 | Hilti Aktiengesellschaft | Hollow drilling tool |
| KR100693722B1 (en) | 2005-04-04 | 2007-03-12 | 김선중 | Stainless Shank Dimond Core Drill For Automobile Safety Glass |
| WO2013053545A1 (en) * | 2011-10-13 | 2013-04-18 | Robert Bosch Gmbh | Hammer core bit |
| WO2020113798A1 (en) * | 2018-12-05 | 2020-06-11 | 江苏锋菱超硬工具有限公司 | Long-service-life ultrathin sintering brazing hole drill for drilling of military armored kevlar layer and production process therefor |
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