WO2011089739A1 - 超硬工具及び硬質チップの固定方法 - Google Patents
超硬工具及び硬質チップの固定方法 Download PDFInfo
- Publication number
- WO2011089739A1 WO2011089739A1 PCT/JP2010/059571 JP2010059571W WO2011089739A1 WO 2011089739 A1 WO2011089739 A1 WO 2011089739A1 JP 2010059571 W JP2010059571 W JP 2010059571W WO 2011089739 A1 WO2011089739 A1 WO 2011089739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tip
- hard
- hole
- hard tip
- chip
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000010953 base metal Substances 0.000 claims description 25
- 238000003825 pressing Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
-
- 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
- E21B10/56—Button-type inserts
-
- 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
- E21B10/58—Chisel-type inserts
-
- 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
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
- F27D3/1527—Taphole forming equipment, e.g. boring machines, piercing tools
Definitions
- the present invention relates to a method for fixing a hard tip in a tool (hereinafter referred to as “hard tool”) to which a chip made of cemented carbide or ceramic (hereinafter referred to as “hard tip”) such as a drill bit or a hammering tool is attached. Is.
- the tool in which the hard tip is fixed by the brazing method or the shrink fitting method is heated to a high temperature when the object to be processed is at a high temperature, so that the hard tip is damaged by the thermal stress or falls off.
- the pit of the blast furnace is closed again when the molten pig iron has been discharged, and the next melting operation is started. If the tip of the mud gun is flattened so that the tip of the mud gun is in close contact with the peripheral edge of the opening of the iron hole), the furnace wall is hot, so the bit with a hard tip brazed or shrink-fitted If the bit is used, there is a problem that the cemented carbide chip falls off immediately.
- Patent Document 1 A method as disclosed in Patent Document 1 is known as a fixing method that makes it difficult for a chip to fall off in an excavation tool.
- this method an uneven shape is formed on the side surface of the base end portion of the chip, and welding is performed so as to cover the side surface.
- Patent Document 1 The method described in Patent Document 1 is directly welded so as to cover the outer peripheral surface of the chip, so the chip is considered to be held firmly, but in the case of a cemented carbide chip that is brittle in material, There is a possibility that cracks may occur due to the effects of thermal shock, etc., which is a practical problem.
- a practical fixing method such as a cemented carbide chip that can withstand use at high temperatures has not yet been established. Therefore, an object of the present invention is to provide a fixing method that can firmly hold a hard chip such as a carbide chip even when used at a high temperature and is less likely to drop off.
- the cemented carbide tool according to claim 1 is provided with a presser ring having a male screw that is fitted into a female screw tip hole provided in a steel base metal and is then screwed into the female screw of the chip hole. It is characterized in that the hard chip is pressed and fixed by screwing.
- a method for fixing a hard tip wherein a tip hole having a diameter larger than the outer diameter of the hard tip is provided at an appropriate position of a steel base metal, and a female screw is formed on an inner peripheral portion of the tip hole.
- a hard tip having an inclined outer peripheral surface with a small diameter at the tip end and a gradually increasing diameter on the base side is fitted into the tip hole, and a male screw is formed on the outer peripheral portion to be screwed into the female screw of the tip hole.
- the inner surface of the presser ring is an inclined surface having a wide lower side and a narrow upper side so as to be in close contact with the outer peripheral surface of the hard tip.
- a presser ring in which a hard tip integrally formed with a flange projecting in the outer peripheral direction at the bottom portion is fitted into the tip hole and a male screw is formed on the outer peripheral portion to be screwed into the female screw of the tip hole.
- the hard chip is fixed inside the screw hole of the base metal by screwing into the female screw of the chip hole and pressing the flange of the hard chip with the hard chip inserted into the screw hole.
- the hard tip is mechanically pressed and fixed inside the tip hole with a threaded holding ring, so that it can be used in a high temperature state such as a pit opening of a blast furnace. .
- the fixing method of the hard tip according to the present invention the hard tip is pressed by the presser ring from above in a state where the hard tip is fitted in the tip hole provided in the base metal, and the presser ring is inserted into the tip hole. Since it is screwed and fixed to the internal thread of the inner peripheral portion, the hard chip is firmly held. In this fixing method, since the hard chip is not heated to a high temperature for fixing, no crack or the like occurs in the hard chip. Further, since it is different from the shrink-fitting method using thermal expansion without using a brazing material, there is no fear of chipping off even if exposed to a high temperature during use.
- FIG. 1 illustrates a superterm tool according to the present invention, in which a base of a hard tip 3 (in this case, a carbide tip) is fitted into a tip hole 2 provided in the head of a steel base 1. Yes.
- the bottom surface of the chip 3 is in close contact with the bottom surface 7 of the chip hole 2.
- the hard chip 3 is composed of a head portion 3a, a trunk portion 3b, and a base portion 3c, and the head portion 3a is formed in a generally bullet shape having a small tip diameter and a large barrel side diameter.
- the trunk portion 3b has a cylindrical shape with a uniform diameter
- the base portion 3c is formed as an inclined surface having a conical section with a small diameter on the trunk portion side and a gradually increasing diameter on the base portion side.
- the inner diameter of the chip hole 2 of the base metal 1 is larger than the outer diameter of the maximum portion of the base of the hard chip 3, and an appropriate gap 4 is maintained between the inner surface of the chip hole and the outer peripheral surface of the chip.
- a female screw 2 a is formed on the inner periphery of the tip hole 2.
- the presser ring 5 is formed with a fitting hole 6 in the middle portion where the upper and lower intermediate portions of the hard tip 3 are fitted.
- the inner peripheral surface of the fitting hole 6 is formed as a trumpet-shaped inclined surface having a narrow top and a wide bottom so as to be in close contact with the inclined outer peripheral surface of the base 3 c of the chip 3.
- a male screw 5 a that is screwed into the female screw 2 a of the tip hole 2 is formed on the outer periphery of the presser ring 5. Since the presser ring 5 is screwed into the female screw of the tip hole 2 of the base metal, an engaging means such as a wrench flat for engaging a tool such as a spanner or an engaging pin hole is provided on the upper part thereof. It is preferable to leave.
- the hard chip 3 When the hard chip 3 is fixed to the base 1, first, the hard chip 3 is fitted into the center of the chip hole 2, and the presser ring 5 is put on the hard chip 3 to fit the hard chip 3 into the fitting hole 6. To do. In this state, the presser ring 5 is screwed into the female screw of the tip hole 2 until it comes into close contact with the hard tip 3.
- the inner peripheral surface of the fitting hole 6 of the presser ring 5 is formed as an inclined surface that is in close contact with the inclined surface of the base of the hard tip 3, so that the inner peripheral surface is in close contact with the outer peripheral surface of the hard tip.
- the presser ring 5 does not reach the bottom surface 7 of the tip hole 2, and a space is formed between the bottom surface and the lower surface of the presser plate 5.
- the chip 3 is pressed and fixed by the pressing plate 5.
- the outer peripheral surface of the tip 3 is formed as a conical inclined surface
- the inner peripheral surface of the presser plate 5 is formed as a trumpet-shaped inclined surface that fits the outer peripheral surface of the chip. Therefore, the inner peripheral surface of the fitting hole of the presser plate 5 and the outer peripheral surface of the chip are in close contact, and the chip can be firmly fixed.
- FIG. 3 to 5 show a base metal 1.
- the base metal 1 is made of a steel material, and a plurality of tip holes 2 and a flushing hole 8 are formed on an upper surface (tip surface) including four cutting wings 1a. And a flushing hole 9 is also provided on the side surface.
- Reference numeral 20 in the figure denotes a screw hole for attaching to a drill rod.
- FIG. 6 shows the appearance of a bit representing a completed state in which the hard chip 3 is fixed to the base 1.
- the upper surface of the presser ring 5 to which the hard chip 3 is fixed slightly protrudes from the surface of the base metal 1, but it can also be designed to be substantially flush with the surface of the base metal 1.
- the bit used for opening the iron opening hole is often discarded because the hard chip is damaged by high heat at the time of opening in one use. Therefore, as a fixing method of the hard chip, the appearance or the like is not a problem as long as it can be fixed firmly enough to withstand use.
- FIG. 7.8 shows an embodiment slightly different from the above, and in this embodiment, the flange 31 is integrally formed at the base of the hard tip 3.
- the flange 31 has an outer diameter substantially the same as the inner diameter of the tip hole 2 and a height of several millimeters.
- a presser ring 5 is screwed onto the flange 31, and the lower surface of the presser ring 5 is in close contact with the upper surface of the flange 31. is doing.
- the flange 31 integral with the hard tip 3 is pressed by the press ring 5, the fixing of the hard tip 3 is more reliable.
- FIGS. 9 and 10 show a reference example different from the above, and in this embodiment, a male screw 14 is directly provided on the outer periphery of the base portion of the hard tip 13.
- the hard tip 13 is directly screwed into the tip hole 2 having a female thread. That is, the hard chip 13 is screwed directly to the base 1. Screwing a part to a base material is usually performed, but since a hard chip is generally brittle, fixing with a screw has not been performed. However, since the tool used for opening the tap hole is often disposable after one use, such a screw-type fixing method can be employed. In this way, a male screw may be formed on the hard tip itself. However, since it is generally difficult to form a threaded portion on this type of hard tip, it is practical to press with the presser ring 5 as in the above embodiment. Preferred above.
- a hard tip such as a cemented carbide tip can be mechanically firmly fixed to a steel base metal, and a high-temperature object can be fixed. Even when used, the chip is difficult to fall off. In addition, since a thermal shock is not applied to the chip itself at the time of fixing, even a cemented carbide chip made of a brittle material can be reliably fixed.
- the fixing method of the hard tip in the cemented carbide tool of the present invention can be used to fix the hard tip to the steel base metal without difficulty, and is used as a tip fixing method for the carbide tool used for high heat application. be able to.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Percussive Tools And Related Accessories (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Connection Of Plates (AREA)
Abstract
Description
2 チップ穴
3 硬質チップ
5 押えリング
13 硬質チップ
31 フランジ
Claims (4)
- 鋼製の台金に設けた雌ねじ付きのチップ穴に硬質チップを嵌めこみ、その上から前記雌ねしに螺合する雄ねじを外周部に備えた押えリングを螺着して前記硬質チップを押圧固定したことを特徴とする超硬工具。
- 鋼製の台金の適所に硬質チップの外径よりも大径のチップ穴を設けて、該チップ穴の内周部には雌ねじを形成し、先端部の径が小さく基部側の径が次第に大きくなる傾斜外周面を有する硬質チップを前記チップ穴に嵌め込むとともに、外周部に前記チップ穴の雌ねじに螺合する雄ねじが形成され、内周部に前記硬質チップの外周に密着する通孔が形成された押えリングを、その通孔に前記硬質チップを挿通した状態で前記チップ穴の雌ねじに螺合して硬質チップを押え付けることにより、硬質チップを台金のねじ穴内部に固定することを特徴とする硬質チップの固定方法。
- 前記押えリングの内面が、硬質チップの外周面に密着するように、下側が広く上側が狭い傾斜面として形成されている請求項2に記載の硬質チップの固定方法。
- 鋼製の台金の適所に硬質チップの外径よりも大径のチップ穴を設けて、該チップ穴の内周部に雌ねじを形成し、底部に外周方向に張出するフランジを一体形成した硬質チップを前記チップ穴に嵌め込むとともに、外周部に前記チップ穴の雌ねじに螺合する雄ねじが形成された押えリングを、その通孔に前記硬質チップ挿通した状態で前記チップ穴の雌ねじに螺合して硬質チップのフランジを押え付けることにより、硬質チップを台金のねじ穴内部に固定することを特徴とする硬質チップの固定方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112010005170T DE112010005170T5 (de) | 2010-01-21 | 2010-05-28 | Zementiertes Karbidwerkzeug und Verfahren zum Fixieren einer harten Spitze |
KR1020127019026A KR20130018224A (ko) | 2010-01-21 | 2010-05-28 | 초경 공구 및 경질 팁의 고정방법 |
RU2012130947/03A RU2012130947A (ru) | 2010-01-21 | 2010-05-28 | Твердосплавный инструмент и способ закрепления твердосплавного наконечника |
CN201080061997.1A CN103249906B (zh) | 2010-01-21 | 2010-05-28 | 超硬工具及硬质触头的固定方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010010996A JP5668909B2 (ja) | 2010-01-21 | 2010-01-21 | 超硬工具及び硬質チップの固定方法 |
JP2010-010996 | 2010-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011089739A1 true WO2011089739A1 (ja) | 2011-07-28 |
Family
ID=44306558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/059571 WO2011089739A1 (ja) | 2010-01-21 | 2010-05-28 | 超硬工具及び硬質チップの固定方法 |
Country Status (7)
Country | Link |
---|---|
JP (1) | JP5668909B2 (ja) |
KR (1) | KR20130018224A (ja) |
CN (1) | CN103249906B (ja) |
DE (1) | DE112010005170T5 (ja) |
RU (1) | RU2012130947A (ja) |
TW (1) | TWI541428B (ja) |
WO (1) | WO2011089739A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017115097A1 (en) * | 2015-12-29 | 2017-07-06 | Arcelormittal | Drill bit, tap hole drilling machine equipped with said drill bit, and process for making said drill bit |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201223530D0 (en) | 2012-12-31 | 2013-02-13 | Element Six Abrasives Sa | A cutter element for rock removal applications |
JP6238432B2 (ja) * | 2013-07-22 | 2017-11-29 | 株式会社奥村組 | シールド掘進機のカッタ盤およびそれを備えるシールド掘進機 |
KR102415285B1 (ko) | 2020-06-09 | 2022-07-01 | (주)달성 | 비트 초경 팁 용접용 고주파 유도가열 장치 |
KR102503100B1 (ko) | 2021-05-13 | 2023-02-24 | (주)달성 | 비트바디의 초경 팁 용접방법 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006289549A (ja) * | 2005-04-11 | 2006-10-26 | Hiroshi Takezaki | 超硬工具における超硬チップの固定方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60169385U (ja) * | 1984-04-19 | 1985-11-09 | 三菱重工業株式会社 | 穿孔用ボタンビツト |
JPH11131962A (ja) * | 1997-10-31 | 1999-05-18 | Hashimoto Chuzo Kogyo Kk | 穿削用ビットの製造方法 |
JP3772746B2 (ja) | 2002-01-21 | 2006-05-10 | 三菱マテリアル株式会社 | 掘削工具 |
US6904983B2 (en) * | 2003-01-30 | 2005-06-14 | Varel International, Ltd. | Low-contact area cutting element |
CN201343994Y (zh) * | 2009-01-20 | 2009-11-11 | 中国科学院武汉岩土力学研究所 | 一种高尾矿坝超深钻探钻头装置 |
-
2010
- 2010-01-21 JP JP2010010996A patent/JP5668909B2/ja active Active
- 2010-05-28 WO PCT/JP2010/059571 patent/WO2011089739A1/ja active Application Filing
- 2010-05-28 DE DE112010005170T patent/DE112010005170T5/de active Pending
- 2010-05-28 KR KR1020127019026A patent/KR20130018224A/ko active Search and Examination
- 2010-05-28 CN CN201080061997.1A patent/CN103249906B/zh active Active
- 2010-05-28 RU RU2012130947/03A patent/RU2012130947A/ru not_active Application Discontinuation
- 2010-12-15 TW TW099143957A patent/TWI541428B/zh active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006289549A (ja) * | 2005-04-11 | 2006-10-26 | Hiroshi Takezaki | 超硬工具における超硬チップの固定方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017115097A1 (en) * | 2015-12-29 | 2017-07-06 | Arcelormittal | Drill bit, tap hole drilling machine equipped with said drill bit, and process for making said drill bit |
WO2017115276A1 (en) * | 2015-12-29 | 2017-07-06 | Arcelormittal | Drill bit, tap hole drilling machine equipped with said drill bit, and process for making said drill bit |
Also Published As
Publication number | Publication date |
---|---|
TWI541428B (zh) | 2016-07-11 |
RU2012130947A (ru) | 2014-02-27 |
KR20130018224A (ko) | 2013-02-20 |
JP2011149192A (ja) | 2011-08-04 |
TW201139834A (en) | 2011-11-16 |
CN103249906A (zh) | 2013-08-14 |
JP5668909B2 (ja) | 2015-02-12 |
DE112010005170T5 (de) | 2012-10-31 |
CN103249906B (zh) | 2015-08-12 |
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