JP3474263B2 - Lock bit - Google Patents
Lock bitInfo
- Publication number
- JP3474263B2 JP3474263B2 JP13941494A JP13941494A JP3474263B2 JP 3474263 B2 JP3474263 B2 JP 3474263B2 JP 13941494 A JP13941494 A JP 13941494A JP 13941494 A JP13941494 A JP 13941494A JP 3474263 B2 JP3474263 B2 JP 3474263B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- bit
- central
- shape
- drilling
- 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 - Lifetime
Links
- 238000005553 drilling Methods 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000005219 brazing Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、打撃穿孔用のロックビ
ットに関し、特に、掘削チップの脱落が減少するように
改善したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock bit for impact drilling, and more particularly to an improved rock bit for reducing dropout of a drilling tip.
【０００２】[0002]
【従来の技術】従来、この種のロックビットは、トンネ
ル工事や採石工事等に利用され、掘削用チップの配置形
状によってカービット，クロスビット，Ｘ形ビット，Ｙ
形ビットなどと称されている。例えば、特公昭４４−６
４５号公報では、噴射開口を備えた中央駒から４つの放
射方向に延びる掘削チップが配置されるようにしたＸ
形，クロス形のロックビットが開示されている。そし
て、前記中央駒は、鋼製で、超硬合金製の掘削チップと
ともにビット本体の取付け溝および中央溝部分にろう付
けされる構成になっている。2. Description of the Related Art Conventionally, this type of rock bit has been used for tunnel construction, quarrying construction, etc., and a car bit, a cross bit, an X-shaped bit, a Y-shaped bit, depending on the arrangement shape of excavation chips
It is called a shape bit. For example, Japanese Patent Publication No.
According to Japanese Patent Laid-Open No. 45-45, the four drilling tips extending in the radial direction are arranged from a center piece having an injection opening.
Type and cross type lock bits are disclosed. The central piece is made of steel and is brazed to the mounting groove and the central groove portion of the bit body together with the cemented carbide drilling tip.
【０００３】[0003]
【発明が解決しようとする課題】しかして、前記公報に
開示されたビットでは、中央駒の打撃損傷が進行する
と、掘削チップの内側にも打撃や繰り粉の衝撃を直接受
けることになり、これによって掘削チップの脱落が生
じ、短期寿命となる問題点があった。However, in the bit disclosed in the above publication, when the damage of the center piece progresses, the inside of the drilling tip is also directly hit and impacted by the dusting. There was a problem that the drilling tip fell out and the life was short.
【０００４】このようなことから、本発明では、掘削チ
ップの脱落を防止して、長期寿命を得ようとするもので
ある。In view of the above, the present invention is intended to prevent dropping of the drilling tip and obtain a long life.
【０００５】[0005]
【課題を解決するための手段】本発明は、上述の点に鑑
みなされたもので、ビット本体の取付け溝および中央溝
部分に配置される掘削チップおよび中央駒は、超硬合金
によって一体成形されるようにしたものである。また、
この中央駒は、その先端部分が掘削チップよりも凹んだ
位置関係にあって、隣接する掘削チップ間のビット本体
部分には、中央駒に通じる排出溝が形成されるようにな
っている。そして、中央駒を一体成形した掘削チップ
は、一文字状、Ｙ状、十字状、Ｘ状から選ばれるいずれ
かの形状を呈するように構成される。The present invention has been made in view of the above points, and the drilling tip and the center piece arranged in the mounting groove and the central groove portion of the bit body are integrally formed of cemented carbide. It was done so. Also,
The central piece has a positional relationship in which the tip portion is recessed from the excavating tip, and a discharge groove communicating with the central piece is formed in the bit main body portion between the adjacent excavating tips. The excavation tip integrally molded a central piece are all single letter shaped, Y-shaped, cross-shaped, selected from X-shaped
It is configured to exhibit the shape of the.
【０００６】[0006]
【作用】本発明のロックビットは、掘削チップおよび中
央駒が超硬合金で一体成形されるため、打撃穿孔時にお
ける中央駒の損傷が減少する。また、掘削チップは、全
体がろう付けされることから相互に補強しあうためろう
付け強度が増加し、掘削チップの脱落を防止する。In the rock bit of the present invention, since the drilling tip and the center piece are integrally formed of cemented carbide, damage to the center piece at the time of punching by impact is reduced. Further, since the drilling tips are brazed as a whole, they reinforce each other to increase brazing strength and prevent the drilling tips from falling off.
【０００７】[0007]
【実施例】以下、本発明ロックビットの一実施例につい
て、図を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the lock bit of the present invention will be described below with reference to the drawings.
【０００８】図１乃至図３は、本発明をクロスビットに
適用したものであり、円筒状をなすビット本体１の先端
部には、径方向の取付け溝２および中央溝部分３がそれ
ぞれ連通するようになっている。そして、取付け溝２お
よび中央溝部分３内には、噴射開口４ａを備えた中央駒
４および楔状刃先５ａを有する掘削チップ５がそれぞれ
配置されている。この場合、中央駒４および掘削チップ
５は、超硬合金からなり、しかも焼結によって一体成形
されたもので、前記取付け溝２および中央溝部分３内で
ろう付けされる。FIGS. 1 to 3 show the case where the present invention is applied to a cross bit. A radial mounting groove 2 and a central groove portion 3 are communicated with the tip of a cylindrical bit body 1, respectively. It is like this. Then, in the mounting groove 2 and the central groove portion 3, a central piece 4 having an injection opening 4a and a drilling tip 5 having a wedge-shaped cutting edge 5a are arranged, respectively. In this case, the central piece 4 and the drilling tip 5 are made of cemented carbide and are integrally formed by sintering, and are brazed in the mounting groove 2 and the central groove portion 3.
【０００９】しかして、前記中央駒４の先端部分は、掘
削チップ５よりも凹んだ位置関係にあり、前記噴射開口
４ａは、ビット本体１の受入れ穴６から延びる供給穴７
と連通する。この場合、受入れ穴は、内周ねじを備えて
いるが、取付け形式によってテーパ穴にすることも可能
である。Therefore, the tip end portion of the central piece 4 is in a positional relationship recessed from the drilling tip 5, and the injection opening 4a extends from the receiving hole 6 of the bit body 1 into the supply hole 7.
Communicate with. In this case, the receiving hole is provided with an inner peripheral thread, but it may be a tapered hole depending on the mounting type.
【００１０】また、ビット本体１の外周側部では、繰り
粉排出溝８が凹設され、この繰り粉排出溝８には、前記
供給穴７から斜上方に延びる噴射穴９が開口する。さら
に、ビット本体１の先端部では、前述した掘削チップ５
の楔状刃先５ａの斜面に連続することにより繰り粉排出
部１０が形成される。そして、この繰り粉排出部１０に
は、凹んだ位置関係にある前記中央駒４に通じる先端排
出溝１１が形成される。Further, on the outer peripheral side of the bit body 1, a powder-removal discharge groove 8 is recessed, and an injection hole 9 extending obliquely upward from the supply hole 7 is opened in the powder-removal discharge groove 8. Further, at the tip of the bit body 1, the above-mentioned drilling tip 5
The dust-removing part 10 is formed by continuing the slope of the wedge-shaped blade edge 5a. Further, in this powder-removal portion 10, a tip discharge groove 11 is formed which communicates with the central piece 4 having a recessed positional relationship.
【００１１】図４は、Ｙ形のロックビットに適用したも
ので、ビット本体１の取付け溝２および中央溝部分３に
は、中央駒４を一体成形した掘削チップ５が前述したと
同様にろう付けされている。また、繰り粉排出部１０に
は、先端排出溝１１が形成されている。FIG. 4 is applied to a Y-shaped lock bit. A drilling tip 5 in which a central piece 4 is integrally molded in the mounting groove 2 and the central groove portion 3 of the bit body 1 is the same as described above. It is attached. Further, a tip discharge groove 11 is formed in the powdered powder discharge section 10.
【００１２】図５は、ビット本体１の外周部における繰
り粉排出溝８の構成を変更したものであり、これに伴っ
て掘削チップ５の交差する方向の長さが異なるようにな
っているものである。また、図６は、カービット形式の
ロックビットに適用したものである。さらに、図７は、
別のカービット形式のロックビットに適用したもので、
楔状刃先５ａが径方向で平行関係に位置するようになっ
ているものである。そして、図５乃至図７にみられるロ
ックビットは、いずれも中央駒４が掘削チップ５と焼結
によって一体成形された超硬合金からなっている。この
場合、超硬合金は、ＷＣ系，ＴｉＣ系，ＴｉＮ系のもの
が適宜選択される。また、前記先端排出溝１１は、図５
乃至図７には、図示されていないが、適宜形成すること
も可能である。FIG. 5 shows a modification of the structure of the dust-removing groove 8 on the outer peripheral portion of the bit body 1, with which the length of the excavating tip 5 in the intersecting direction is different. Is. Further, FIG. 6 is applied to a lock bit of the car bit format . Furthermore, FIG.
It is applied to another carbit format lockbit,
The wedge-shaped blade edges 5a are arranged in parallel relation in the radial direction. Each of the rock bits shown in FIGS. 5 to 7 is made of cemented carbide in which the center piece 4 and the drilling tip 5 are integrally formed by sintering. In this case, as the cemented carbide, WC-based, TiC-based, and TiN-based alloys are appropriately selected. The tip discharge groove 11 is shown in FIG.
Although not shown in FIGS. 7 to 7, they can be formed as appropriate.
【００１３】[0013]
【発明の効果】本発明は、以上説明したように、中央駒
４を一体成形した超硬合金製の掘削チップ５がろう付け
されるように構成したものであるから、中央駒の損傷が
減少するとともに、ろう付け強度も掘削チップ５の相互
補助から増加する。As described above, according to the present invention, since the cemented carbide drilling tip 5 integrally formed with the central piece 4 is brazed, damage to the central piece is reduced. At the same time, the brazing strength also increases from the mutual support of the drilling tips 5.
【００１４】したがって、打撃穿孔中における掘削チッ
プ５の脱落がなくなり、長期寿命が期待できるという利
点を有する。また、ろう付け作業も簡素化され、作業性
が良好になるという利点を有する。Therefore, there is an advantage that the drilling tip 5 does not fall off during the impact punching and a long life can be expected. Moreover, there is an advantage that the brazing work is simplified and the workability is improved.
【図１】本発明ロックビットの一実施例を示す平面図、FIG. 1 is a plan view showing an embodiment of a lock bit according to the present invention,
【図２】図１の平面図、FIG. 2 is a plan view of FIG.
【図３】図１中のＡ−Ａ線に沿って得られる断面図、FIG. 3 is a cross-sectional view taken along the line AA in FIG.
【図４】他の実施例を示す平面図、FIG. 4 is a plan view showing another embodiment,
【図５】別の実施例を示す平面図、FIG. 5 is a plan view showing another embodiment,
【図６】さらに他の実施例を示す平面図、FIG. 6 is a plan view showing still another embodiment,
【図７】さらに別の実施例を示す平面図。FIG. 7 is a plan view showing still another embodiment.
１ ビット本体 ２ 取付け溝 ３ 中央溝部分 ４ 中央駒 ４ａ 噴射開口 ５ 掘削チップ ５ａ 楔状刃先 １０ 繰り粉排出部 １１ 先端排出溝 1-bit body 2 mounting groove 3 central groove 4 central pieces 4a Injection opening 5 drilling chips 5a Wedge edge 10 Powdered powder discharge section 11 Tip discharge groove
Claims (3)
径方向の取付け溝２および中央溝部分３がそれぞれ連通
するように設けられ、これらの取付け溝２および中央溝
部分３には、楔状刃先５ａを有する掘削チップ５および
噴射開口４ａを備えた中央駒４がそれぞれろう付けされ
るようにしたロックビットにおいて、前記掘削用チップ
５および中央駒４は、超硬合金によって一体成形されて
いることを特徴とするロックビット。1. A tip portion of a bit body 1 having a cylindrical shape,
A radial mounting groove 2 and a central groove portion 3 are provided so as to communicate with each other, and the mounting groove 2 and the central groove portion 3 are provided with a drilling tip 5 having a wedge-shaped cutting edge 5a and a central piece having an injection opening 4a. A rock bit in which 4 is brazed, wherein the drilling tip 5 and the center piece 4 are integrally formed of cemented carbide.
端部分が掘削チップ５よりも凹んだ位置関係にあり、し
かもビット本体１に設けられた繰り粉排出部１０には、
前記中央駒４に通じる先端排出溝１１が形成されている
請求項１記載のロックビット。2. The center piece 4 according to claim 1 has a positional relationship in which the tip end portion is recessed from the excavation tip 5, and moreover, in the milled powder discharge portion 10 provided in the bit body 1,
The lock bit according to claim 1, wherein a tip discharge groove 11 communicating with the central piece 4 is formed.
した掘削チップ５は、一文字状、Ｙ状、十字状、Ｘ状か
ら選ばれるいずれかの形状を呈している請求項１または
請求項２記載のロックビット。3. The excavation tip 5 integrally formed with the center piece 4 according to claim 1, is a single letter shape, a Y shape, a cross shape, or an X shape .
The lock bit according to claim 1 or 2, which has any shape selected from the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13941494A JP3474263B2 (en) | 1994-05-30 | 1994-05-30 | Lock bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13941494A JP3474263B2 (en) | 1994-05-30 | 1994-05-30 | Lock bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07324580A JPH07324580A (en) | 1995-12-12 |
| JP3474263B2 true JP3474263B2 (en) | 2003-12-08 |
Family
ID=15244681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13941494A Expired - Lifetime JP3474263B2 (en) | 1994-05-30 | 1994-05-30 | Lock bit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3474263B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007154526A (en) * | 2005-12-06 | 2007-06-21 | Giken Seisakusho Co Ltd | Excavation tip and excavation tool |
| JP5800587B2 (en) * | 2011-06-16 | 2015-10-28 | 株式会社斜面対策研究所 | Drilling device |
| CN102704854B (en) * | 2012-05-30 | 2015-03-25 | 西北矿冶研究院 | A special-shaped alloy drill bit and its tooth-fixing process |
| CN110485933B (en) * | 2019-09-11 | 2025-01-14 | 山东兖能泰德重工有限公司 | Air drill head |
| JP6842144B1 (en) * | 2020-11-20 | 2021-03-17 | 株式会社ジオテック | Drilling bit and ground drilling method |
-
1994
- 1994-05-30 JP JP13941494A patent/JP3474263B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07324580A (en) | 1995-12-12 |
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