JP6800354B1 - Opening bit - Google Patents
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- JP6800354B1 JP6800354B1 JP2020003272A JP2020003272A JP6800354B1 JP 6800354 B1 JP6800354 B1 JP 6800354B1 JP 2020003272 A JP2020003272 A JP 2020003272A JP 2020003272 A JP2020003272 A JP 2020003272A JP 6800354 B1 JP6800354 B1 JP 6800354B1
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- opening surface
- opening
- bit
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- end side
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- 239000000843 powder Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims description 18
- 238000003801 milling Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 33
- 229910000805 Pig iron Inorganic materials 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000005219 brazing Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000010079 rubber tapping Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 5
- 239000010953 base metal Substances 0.000 description 5
- 239000010951 brass Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000010409 ironing Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910001208 Crucible steel Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Blast Furnaces (AREA)
Abstract
【課題】出銑口充填マッドを１段階開孔し、かつ、開孔時の直進性や掘削性を向上できる開孔ビットを提供する。【解決手段】繰粉排出溝４、突出端面９、突起物、噴出口３を備える開孔ビット１であって、当該開孔ビットは先端側から後端側にかけて第１開孔面６、第１傾斜開孔面１０、第２傾斜開孔面１０’とを有し、当該開孔ビット内部には中空部を有し、前記繰粉排出溝を少なくとも２以上形成し、前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成され、前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設される、ことを特徴とする開孔ビット。【選択図】図１PROBLEM TO BE SOLVED: To provide an opening bit capable of opening a tap hole filling mud in one step and improving straightness and excavability at the time of opening. SOLUTION: The opening bit 1 is provided with a powder discharge groove 4, a protruding end surface 9, a protrusion, and a spout 3, and the opening bit has a first opening surface 6, a third from a front end side to a rear end side. It has one inclined opening surface 10 and a second inclined opening surface 10', has a hollow portion inside the opening bit, forms at least two or more of the powder discharge grooves, and the protruding end faces are adjacent to each other. The protrusions are formed between the matching powder discharge grooves, respectively, and the protrusions have a substantially sharp conical elongated shape and are centered on the surfaces of the first open hole surface, the first inclined open hole surface, and the second inclined open hole surface. A perforation bit characterized in that at least one perforation surface is planted so that the axes are substantially vertical. [Selection diagram] Fig. 1
Description
本発明は溶鉱炉の出銑口に充填されているマッドを出銑口開孔機で開孔し、銑鉄を流し出すための開孔ビットに関するものである。 The present invention relates to an opening bit for opening a mud filled in a tap of a blast furnace with a tap opening machine and pouring out pig iron.
銑鉄を製造する高炉は、高温で鉄鉱石を溶かした溶鉄を取り出す出銑を行うために、一般的には炉下部に設けた出銑口を開孔する必要がある。溶鉄を排出していない際の出銑口は、不定形耐火物（マッド）で充填して封鎖しているためである。この出銑口の開孔作業は、開孔ビットをパイプロッドの先端に固定し、出銑口開孔機に装着した後、回転や打撃等により開孔する。この開孔作業の際に用いる開孔ビットとしては、種々の形状のものが使用される。 In a blast furnace for producing pig iron, it is generally necessary to open a pig iron outlet provided at the bottom of the furnace in order to take out the molten iron in which iron ore is melted at a high temperature. This is because the tap when the molten iron is not discharged is filled with an amorphous refractory (mud) and closed. In this opening operation of the tap, the opening bit is fixed to the tip of the pipe rod, attached to the tap opening machine, and then the hole is opened by rotation, impact, or the like. As the opening bit used in this opening operation, various shapes are used.
これまでの開孔作業時には、開孔する場所を決めるのに時間を要していたり、開孔位置が決まらないため、開孔ビットがマッド面で揺動するために、ロッドが折れていたり、出銑マッド面を傷つけたりといった問題が生じることがあった。また、出銑マッド内に混在する地金（高炉から高温液体状の銑鉄が冷やされた固まったもの等）等の高硬度の異物により、開孔時間が増加（状況によっては中断）したり、開孔ビットの消耗が激しくなったりすることもあった。 In the conventional drilling work, it takes time to determine the location to drill, or the drilling position is not determined, so the drilling bit swings on the mud surface, and the rod is broken. Problems such as scratching the rod mud surface could occur. In addition, the opening time may be increased (interrupted depending on the situation) due to high-hardness foreign matter such as the bullion mixed in the pig iron mud (such as the hardened pig iron that is cooled by high temperature liquid from the blast furnace). In some cases, the opening bit was worn out severely.
そのため、従来では事前に出銑口開孔機に装着したロッドの先端で一定距離を開孔し、その後ロッドを引抜いて開孔ビットを装着して改めて充填マッドを開孔する２段階方式が行われることもあった。しかし、２段階方式で開孔作業を行うため、作業も煩雑となり、生産性が向上しないばかりか、危険な作業も伴うため作業環境面でもあまり好ましいものではなかった。さらに、地金等の高硬度の異物の存在により開孔作業ができなくなった場合、一旦作業を中断し、強制的に地金等を除去する作業を強いられることになる。 Therefore, in the past, a two-step method was used in which a certain distance was opened with the tip of a rod attached to the ironing port opening machine in advance, then the rod was pulled out, an opening bit was attached, and the filling mud was opened again. Sometimes I was told. However, since the hole opening work is performed in a two-step method, the work becomes complicated, the productivity is not improved, and dangerous work is involved, which is not very preferable in terms of work environment. Further, when the hole opening work cannot be performed due to the presence of a foreign substance having a high hardness such as a bare metal, the work is temporarily interrupted and the work of forcibly removing the bare metal or the like is forced.
そこで１段階方式である開孔方法を可能とするため、前記ロッド及び開孔ビットの内部に高圧水を通過させて冷却し、ビットの先端から水（液状、ミスト状等も含む、以下同じ）を噴出して砕削屑を除去する方法が知られている（例えば特許文献１）。 Therefore, in order to enable a one-step perforation method, high-pressure water is passed through the rod and the perforation bit to cool it, and water (including liquid, mist, etc., the same applies hereinafter) from the tip of the bit. Is known to remove crushed debris (for example, Patent Document 1).
また、出銑口充填マッドを一段階開孔することを可能とした開孔ビットも知られている（例えば特許文献２）。この開孔ビットは、ビット自身が振動するおそれがなく中心軸に沿って充填マッド内を推進し充填マッドをすぐに開孔することができる点で優れる。 Further, there is also known an opening bit that enables one-step opening of a tapping port filling mud (for example, Patent Document 2). This perforated bit is excellent in that the bit itself does not vibrate and can be propelled in the filling mud along the central axis to immediately open the filling mud.
しかしながら、上記特許文献１に記載の方法では、ロッド、開孔ビット及び充填マッドを冷却した状態で１段階開孔を行うものであるため、開孔ビットの中心線の回りの回転振動による振れを防止することは困難であり、開孔中心線に沿う一発開孔をスムーズに適格に行うことは困難であった。 However, in the method described in Patent Document 1, one-step hole opening is performed in a state where the rod, the hole opening bit and the filling mud are cooled, so that the runout due to rotational vibration around the center line of the hole opening bit is caused. It was difficult to prevent it, and it was difficult to smoothly and properly perform a single hole opening along the center line of the hole.
また、上記特許文献２に記載の方法では、マッドの開孔位置を決めて開孔を始めた後はビットの平坦面でマッドを削り進めることなるため、開孔に少し時間がかかることもあり、より短時間で開孔できるような改良の余地があった。 Further, in the method described in Patent Document 2, since the mud is scraped on the flat surface of the bit after the opening position of the mud is determined and the opening is started, it may take some time to open the mud. , There was room for improvement so that the holes could be opened in a shorter time.
また、上記開示された技術は、出銑マッド内に混在する地金（高炉から高温液体状の銑鉄が冷やされた固まったもの等）等の高硬度の異物対策は考慮されていないものである。出銑マッド内に地金が形成されていた場合、従来の開孔ビットを使用する場合は開孔作業を一旦中断し、作業中の開孔ビットを一旦引き抜いて地金除去用のロッド等を用いて地金を除去する作業などが発生してしまい、作業時間が大幅に長引いてしまうといった課題が残る。 In addition, the above-disclosed technology does not take into consideration measures against foreign substances with high hardness such as bullion mixed in the pig iron mud (such as hardened pig iron in high temperature liquid form cooled from a blast furnace). .. If a bullion is formed in the tapping mud, when using a conventional drilling bit, the drilling work is temporarily interrupted, and the drilling bit being worked is pulled out once to remove a rod or the like for removing the bullion. There remains a problem that the work time is significantly prolonged due to the work of removing the bullion by using it.
そこで、本発明の主たる課題は、出銑口充填マッドを１段階開孔し、かつ、開孔時の直進性や掘削性を向上させることにある。また、出銑マッド内に混在する地金（高炉から高温液体状の銑鉄が冷やされた固まったもの等）等の高硬度の異物があったとしても、地金等を除去する作業を行うことなく通常の作業で開孔することにある。さらには、これにより生産性向上やコスト削減を実現させる。 Therefore, a main object of the present invention is to open a tap hole filling mud in one step and to improve straightness and excavability at the time of opening. In addition, even if there is a high-hardness foreign substance such as bullion mixed in the pig iron mud (such as a solidified high-temperature liquid pig iron cooled from a blast furnace), work to remove the bullion, etc. It is to open the hole by normal work. Furthermore, this will improve productivity and reduce costs.
本発明は、以下の（１）〜（１０）に関する。
（１）繰粉排出溝、突出端面、突起物、噴出口を備える開孔ビットであって、当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２傾斜開孔面とを有し、当該開孔ビット内部には中空部を有し、前記繰粉排出溝を少なくとも２以上形成し、前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成され、前記突起物は略鋭円錐形長形状で、前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設される、ことを特徴とする開孔ビット。
（２）繰粉排出溝、突出端面、突起物、噴出口を備える開孔ビットであって、当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２開孔面、第２傾斜開孔面とを有し、当該開孔ビット内部には中空部を有し、前記繰粉排出溝を少なくとも２以上形成し、前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成され、前記突起物は略鋭円錐形長形状で、前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設される、ことを特徴とする開孔ビット。
（３）前記開孔ビットの先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２開孔面、第２傾斜開孔面の４つの開孔面を順次設け、第１開孔面と第２開孔面は充填マッドの接触面と略水平となるように設け、第１傾斜開孔面と第２傾斜開孔面はそれぞれ第１開孔面と第２開孔面に対して所定の角度で傾斜する形状であることを特徴とする前記（２）に記載の開孔ビット。
（４）前記第１開孔面と前記第１傾斜開孔面と第２傾斜開孔面の表面積が先端側から後端側に向かうにつれて大きくなることを特徴とする前記（２）又は（３）に記載の開孔ビット。
（５）前記開孔ビットは先端側から見たときに、前記第１開孔面の最外周に隣接するように前記第１傾斜開孔面の最内周が形成され、第１開孔面の最外周と第１傾斜開孔面の最内周が略同一円状となるように形成され、前記第１傾斜開孔面と前記第２開孔面は開孔ビットの長手方向に所定高さの段差を設けた状態で形成し、当該段差は当該第１傾斜開孔面の最外周の箇所から長手方向に段差を設け、前記開孔ビットを先端側から見たときに前記第１傾斜開孔面の最外周の箇所から前記第２開孔面の最内周が略同一円状となるように形成し、前記第２開孔面の最外周に隣接するように前記第２傾斜開孔面の最内周が形成され、前記第２開孔面の最外周と第２傾斜開孔面の最内周が略同一円状となるように形成されることを特徴とする前記（２）から（４）のいずれか１つに記載の開孔ビット。
（６）前記第１傾斜開孔面と前記第２傾斜開孔面がそれぞれ前記第１開孔面と前記第２開孔面に対して２３〜４５°の角度で設けられることを特徴とする前記（２）から（５）のいずれか１つに記載の開孔ビット。
（７）前記突起物が超硬チップであることを特徴とする前記（２）から（６）のいずれか１つに記載の開孔ビット。
（８）前記突起物が前記第２開孔面の表面上に中心軸が略垂直となる様に少なくとも１以上植設されることを特徴とする前記（２）〜（７）のいずれか１項に記載の開孔ビット。
（９）繰粉排出溝、突出端面、突起物、噴出口を備える開孔ビットの製造方法であって、当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２傾斜開孔面とを有するように形成し、当該開孔ビット内部には中空部を設け、前記繰粉排出溝を少なくとも２以上形成し、前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成し、前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設すること、を特徴とする開孔ビットの製造方法。
（１０）繰粉排出溝、突出端面、突起物、噴出口を備える開孔ビットの製造方法であって、当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２開孔面、第２傾斜開孔面とを有するように形成し、当該開孔ビット内部には中空部を設け、前記繰粉排出溝を少なくとも２以上形成し、前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成し、前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設すること、を特徴とする開孔ビットの製造方法。
The present invention relates to the following (1) to (10).
(1) An opening bit provided with a powder discharge groove, a protruding end surface, a protrusion, and a spout, and the opening bit has a first opening surface, a first inclined opening surface, and the like from the front end side to the rear end side. It has a second inclined opening surface, a hollow portion inside the opening bit, at least two or more of the powder discharge grooves are formed, and the protruding end surface is between the adjacent powder discharge grooves. The protrusions have a substantially sharp conical elongated shape, and the central axis is substantially perpendicular to the surfaces of the first open hole surface, the first inclined open hole surface, and the second inclined open hole surface. A perforation bit, characterized in that at least one is planted on each perforation surface.
(2) An opening bit provided with a powder discharge groove, a protruding end surface, a protrusion, and a spout, and the opening bit has a first opening surface, a first inclined opening surface, and the like from the front end side to the rear end side. It has a second perforated surface and a second inclined perforated surface, has a hollow portion inside the perforated bit, forms at least two or more of the powder discharge grooves, and the protruding end faces are adjacent to each other. Each of the protrusions is formed between the powder discharge groove and the protrusion, and the protrusion has a substantially sharp conical elongated shape, and the central axis is located on the surfaces of the first open hole surface, the first inclined open hole surface, and the second inclined open hole surface. A perforation bit characterized in that at least one perforation surface is planted so as to be substantially vertical.
(3) From the front end side to the rear end side of the perforation bit, four perforation surfaces, a first perforation surface, a first inclined perforation surface, a second perforation surface, and a second inclined perforation surface, are sequentially provided. The first opening surface and the second opening surface are provided so as to be substantially horizontal to the contact surface of the filling mud, and the first inclined opening surface and the second inclined opening surface are the first opening surface and the second opening surface, respectively. The opening bit according to (2) above, which has a shape that is inclined at a predetermined angle with respect to the hole surface.
(4) The surface area of the first opening surface, the first inclined opening surface, and the second inclined opening surface increases from the front end side to the rear end side (2) or (3). ).
(5) When the opening bit is viewed from the tip side, the innermost circumference of the first inclined opening surface is formed so as to be adjacent to the outermost circumference of the first opening surface, and the first opening surface is formed. The outermost circumference and the innermost circumference of the first inclined opening surface are formed to be substantially the same circle, and the first inclined opening surface and the second opening surface have a predetermined height in the longitudinal direction of the opening bit. The step is formed in a state where the step is provided, and the step is provided in the longitudinal direction from the outermost peripheral portion of the first inclined hole opening surface, and the first inclination when the opening bit is viewed from the tip side. The second inclined opening is formed so that the innermost circumference of the second opening surface is substantially the same circle from the outermost outer circumference of the opening surface, and is adjacent to the outermost outer circumference of the second opening surface. The innermost circumference of the hole surface is formed, and the outermost circumference of the second opening surface and the innermost circumference of the second inclined opening surface are formed so as to have substantially the same circular shape (2). The opening bit according to any one of (4) to (4).
(6) The first inclined opening surface and the second inclined opening surface are provided at an angle of 23 to 45 ° with respect to the first opening surface and the second opening surface, respectively. The opening bit according to any one of (2) to (5).
(7) The opening bit according to any one of (2) to (6) above, wherein the protrusion is a cemented carbide tip.
(8) Any one of (2) to (7) above, wherein at least one of the protrusions is planted on the surface of the second opening surface so that the central axis is substantially vertical. The perforation bit described in the section.
(9) A method for manufacturing a perforated bit having a powder discharge groove, a protruding end face, a protrusion, and a spout, and the perforated bit has a first perforated surface and a first inclined opening from the front end side to the rear end side. It is formed so as to have a hole surface and a second inclined opening surface, a hollow portion is provided inside the opening bit, at least two or more of the powder discharge grooves are formed, and the protruding end faces are adjacent to each other. Each of the protrusions is formed between the discharge groove and the protrusion, and the protrusion has a substantially sharp conical elongated shape, and the central axis is substantially vertical on the surfaces of the first opening surface, the first inclined opening surface, and the second inclined opening surface. A method for manufacturing a perforated bit, characterized in that at least one perforated surface is planted so as to be.
(10) A method for manufacturing a perforated bit having a powder discharge groove, a protruding end face, a protrusion, and a spout, and the perforated bit has a first perforated surface and a first inclined opening from the front end side to the rear end side. It is formed so as to have a hole surface, a second hole surface, and a second inclined hole surface, a hollow portion is provided inside the hole opening bit, at least two or more of the powder discharge grooves are formed, and the protruding end surface is formed. Are formed between the adjacent powder discharge grooves, and the protrusions have a substantially sharp conical elongated shape on the surfaces of the first open hole surface, the first inclined open hole surface, and the second inclined open hole surface. A method for manufacturing a perforated bit, characterized in that at least one perforated surface is planted so that the central axis is substantially vertical to the perforated surface.
本発明の開孔ビットによれば、出銑口充填マッドを１段階開孔し、かつ、開孔時の直進性や掘削性を向上させることが可能となる。さらに、出銑マッド内に形成された地金等の高硬度の異物があった場合でも、別途地金等を除去する作業を行うことなく、通常の開孔作業の工程で地金を避けつつ開孔することが可能となるため作業効率も改善される。
According to the opening bit of the present invention, it is possible to open the tapping port filling mud in one step and improve the straightness and excavability at the time of opening. Furthermore, even if there is a foreign substance with high hardness such as bullion formed in the tapping mud, the bullion can be avoided in the normal drilling process without removing the bullion separately. Since it is possible to open a hole, work efficiency is also improved.
以下、本発明の実施形態について図面を参酌して説明する。図１の（ａ）は本実施形態１の開孔ビット１の平面図、図１の（ｂ）は本実施形態１の開孔ビット１の正面図を示す。図１において、２は充填マッドを掘削する突起物として超硬チップを使用、３は空気や水等の噴出口、４は充填マッドを掘削することにより発生する繰粉を排出するための繰粉排出溝、５はロッドを取り付けるためのロッド取付部、９は突出端部を示す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A shows a plan view of the opening bit 1 of the first embodiment, and FIG. 1B shows a front view of the opening bit 1 of the present embodiment 1. In FIG. 1, 2 uses a carbide tip as a protrusion for excavating a filling mud, 3 is an outlet for air, water, etc., and 4 is a milling powder for discharging the milling powder generated by excavating the filling mud. The discharge groove 5 indicates a rod attachment portion for attaching the rod, and 9 indicates a protruding end portion.
本実施形態１の前記超硬チップ２は略鋭円錐形長形状で、先端部は丸みを帯びた略球面形状である。また、前記ロッド取付部５は開孔ビット１の中心軸線を共有するものである（厳密に同一の中心軸線を共有するものではなくても良い）。本実施形態１のロッド取付部は円柱形状のものを使用する。 The cemented carbide tip 2 of the first embodiment has a substantially sharp conical elongated shape, and the tip portion has a substantially spherical shape with a rounded shape. Further, the rod mounting portion 5 shares the central axis of the opening bit 1 (it does not have to share exactly the same central axis). The rod mounting portion of the first embodiment uses a cylindrical shape.
本実施形態１の開孔ビット１は、台金を先端側から後端側にかけて順に異なる高さに第１開孔面６、第１傾斜開孔面１０、第２開孔面６’、第２傾斜開孔面１０’の４つの開孔面となるように形成する。第１開孔面６と第２開孔面６’は充填マッドを掘削する際に充填マッドの接触面と略水平となるように形成し（開孔ビット１の後端面と略水平）、第１傾斜開孔面１０と第２傾斜開孔面１０’はそれぞれ第１開孔面６と第２開孔面６’に対して所定の角度で傾斜して形成する形状である。第１傾斜開孔面１０と第２傾斜開孔面１０’の傾斜角度は特に限定するものではないが、第１開孔面６と第２開孔面６’に対してそれぞれ２３〜４５°であることがより効率よく充填マッド材を砕くことができるといった理由で好ましく、それぞれが異なる角度でもよい。なお、本実施形態においては第１開孔面６と第２開孔面６’に対して約３０°の角度で傾斜している第１傾斜開孔面１０と第２傾斜開孔面１０’を使用した。また、開孔ビット１を先端側から見たときに、第１開孔面の最外周に隣接するように第１傾斜開孔面１０の最内周が形成され、これらは第１開孔面６の最外周と第１傾斜開孔面１０の最内周が略同一円状となるように形成される。また、第１傾斜開孔面１０と第２開孔面６’とは、開孔ビットの長さ方向に一定の高さを設けて段差を有した状態で形成する。この段差は、第１傾斜開孔面１０の最外周の箇所から長手方向に段差を設け、開孔ビット１を先端側から見たときに第１傾斜開孔面１０の最外周の箇所から第２開孔面６’の最内周が略同一円状となるように形成する。本段差の高さについては特に限定されるものではなく、開孔ビット１の長さ方向の高さに応じて適宜選択する（開孔ビット１を先端側から見たさいの幅が１００φ以下の場合で５ｍｍ~２ｃｍ程度）。同様に、開孔ビット１を先端側から見たときに、第２開孔面６’の最外周に隣接するように第２傾斜開孔面１０’の最内周が形成され、これらは第１開孔面６の最外周と第１傾斜開孔面１０の最内周が略同一円状となるように形成される。なお、これらは厳密に同一円状となる必要はなく、成形等の際に若干のずれなどが生じる場合もあり得る。また、第１開孔面６、第１傾斜開孔面１０、第２開孔面６’、第２傾斜開孔面１０’の４つの開孔面は先端側からみた際に略同心円となるように形成することにより、より充填マッドを均一かつ効率的に開孔できる点で好ましい。 In the opening bit 1 of the first embodiment, the base metal is placed at different heights in order from the front end side to the rear end side, the first opening surface 6, the first inclined opening surface 10, the second opening surface 6', and the first. It is formed so as to have four open hole surfaces of two inclined open hole surfaces 10'. The first opening surface 6 and the second opening surface 6'are formed so as to be substantially horizontal to the contact surface of the filling mud when excavating the filling mud (approximately horizontal to the rear end surface of the opening bit 1). The 1-tilted opening surface 10 and the 2nd inclined opening surface 10'are formed so as to be inclined at a predetermined angle with respect to the 1st opening surface 6 and the 2nd opening surface 6', respectively. The inclination angles of the first inclined opening surface 10 and the second inclined opening surface 10'are not particularly limited, but are 23 to 45 ° with respect to the first opening surface 6 and the second opening surface 6', respectively. Is preferable because the filling mud material can be crushed more efficiently, and each may have a different angle. In the present embodiment, the first inclined opening surface 10 and the second inclined opening surface 10'are inclined at an angle of about 30 ° with respect to the first opening surface 6 and the second opening surface 6'. It was used. Further, when the opening bit 1 is viewed from the tip side, the innermost circumference of the first inclined opening surface 10 is formed so as to be adjacent to the outermost circumference of the first opening surface, and these are the first opening surfaces. The outermost circumference of No. 6 and the innermost circumference of the first inclined opening surface 10 are formed to have substantially the same circular shape. Further, the first inclined opening surface 10 and the second opening surface 6'are formed in a state where a constant height is provided in the length direction of the opening bit and a step is provided. This step is provided in the longitudinal direction from the outermost peripheral portion of the first inclined opening surface 10, and when the opening bit 1 is viewed from the tip side, the step is first from the outermost peripheral portion of the first inclined opening surface 10. 2 The innermost circumference of the opening surface 6'is formed so as to have substantially the same circular shape. The height of this step is not particularly limited, and is appropriately selected according to the height of the perforation bit 1 in the length direction (the width when the perforation bit 1 is viewed from the tip side is 100φ or less). In some cases, about 5 mm to 2 cm). Similarly, when the opening bit 1 is viewed from the tip side, the innermost circumference of the second inclined opening surface 10'is formed so as to be adjacent to the outermost circumference of the second opening surface 6', and these are the first. 1 The outermost circumference of the opening surface 6 and the innermost circumference of the first inclined opening surface 10 are formed to have substantially the same circular shape. It should be noted that these do not have to be exactly the same circle shape, and there may be a slight deviation or the like during molding or the like. Further, the four opening surfaces of the first opening surface 6, the first inclined opening surface 10, the second inclined opening surface 6', and the second inclined opening surface 10'are substantially concentric circles when viewed from the tip side. It is preferable that the filled mud can be opened more uniformly and efficiently by forming the pad as described above.
本実施形態１の開孔ビット１は、第１開孔面６の表面積（超硬チップ２を取付けた箇所の表面積も含む、以下同じ）が、第１傾斜開孔面１０、第２開孔面６’、第２傾斜開孔面１０’それぞれの開孔面の表面積よりも小さいものである。また、第１傾斜開孔面１０の表面積は第２傾斜開孔面１０’の表面積よりも小さいものである。また、第１開孔面６の表面積が、第１傾斜開孔面１０の表面積に対して約４０％〜７０％の範囲内、第２傾斜開孔面１０’の表面積に対して約１０〜５０％の範囲内であることが、充填マッド開孔時の直進性や掘削性の向上や、出銑マッド内に混在する地金等の高硬度の異物を避けつつ開孔を継続できる点でより優れる。なお、本実施形態においては、第１開孔面６の表面積は約６１６ｍｍ２、第１傾斜開孔面１０の表面積は約１１１９ｍｍ２、第２開孔面６’の表面積は約１４８２ｍｍ２、第２傾斜開孔面１０’の表面積は約１２０１ｍｍ２の開孔ビットを使用した。 The opening bit 1 of the first embodiment has the surface area of the first opening surface 6 (including the surface area of the portion where the cemented carbide tip 2 is attached, the same applies hereinafter) of the first inclined opening surface 10 and the second opening. It is smaller than the surface area of each of the surface 6'and the second inclined hole surface 10'. Further, the surface area of the first inclined opening surface 10 is smaller than the surface area of the second inclined opening surface 10'. Further, the surface area of the first inclined hole surface 6 is in the range of about 40% to 70% with respect to the surface area of the first inclined hole surface 10, and about 10 to 10% with respect to the surface area of the second inclined hole surface 10'. Within the range of 50%, the straightness and excavability at the time of opening the filling mud can be improved, and the opening can be continued while avoiding high-hardness foreign substances such as bullion mixed in the tapping mud. Better. In the present embodiment, the surface area of the first opening surface 6 is about 616 mm2, the surface area of the first inclined opening surface 10 is about 1119 mm2, the surface area of the second opening surface 6'is about 1482 mm2, and the second inclined opening. A perforated bit having a surface area of about 1201 mm2 was used.
図２は本実施形態１の開孔ビット１の断面図を示す。図２は開孔ビット１のＡ−Ａの断面図を示す。本実施形態１の開孔ビットは中空部７を有しており、図１で図示した水の噴出口３の経路に繋がっている。この構造により、開孔作業により発生した充填マッドやビットやチップ砕削屑等を、繰粉排出溝４を通じて充填マッド４０の開孔口８から出銑口１外に排出しながら、出銑口３０の充填マッドを開孔して出銑する。 FIG. 2 shows a cross-sectional view of the opening bit 1 of the first embodiment. FIG. 2 shows a cross-sectional view of AA of the opening bit 1. The opening bit of the first embodiment has a hollow portion 7 and is connected to the path of the water outlet 3 shown in FIG. With this structure, the filling mud, the bit, the chip crushed waste, etc. generated by the opening work are discharged from the opening 8 of the filling mud 40 to the outside of the ironing port 1 through the powder discharge groove 4. 30 filling muds are opened and pig iron is ejected.
本実施形態１の開孔ビット１には超硬チップ２を１１個使用し、そのうちの２個は開孔ビット１の第１開孔面６に、３個は開孔ビット１の第１傾斜開孔面１０に、３個は開孔ビットの第２開孔面６’に、３個は開孔ビット１の第２傾斜開孔面１０’に植設した。各超硬チップは、各開孔面表面上に超硬チップ２の各軸心が表面に対して略垂直となるように形成する。また、これらの超硬チップ２は、開孔ビット１の先端方向から見て、第１開孔面に植設された超硬チップ２を基準に、順次螺旋状となるように形成する。本発明において植設する方法は特に限定するものではないが、銀ろう・黄銅ろうや真鍮ろうでろう付けする方法や溶接で固定させることができる。 Eleven carbide tips 2 are used for the perforation bit 1 of the first embodiment, two of which are on the first perforation surface 6 of the perforation bit 1 and three are the first inclination of the perforation bit 1. Three were planted on the opening surface 10 on the second opening surface 6'of the opening bit, and three were planted on the second inclined opening surface 10'of the opening bit 1. Each cemented carbide tip is formed on the surface of each perforated surface so that each axis of the cemented carbide tip 2 is substantially perpendicular to the surface. Further, these cemented carbide tips 2 are formed in a spiral shape in order with reference to the cemented carbide tip 2 planted on the first opening surface when viewed from the tip direction of the opening bit 1. The method of planting in the present invention is not particularly limited, but it can be fixed by brazing with silver brazing, brass brazing or brass brazing, or by welding.
第１傾斜開孔面１０に設置された超硬チップ２で削孔できる第１ゲージ径は、直進性を向上させ、地金等の影響を削孔時に少なくするために、必要削孔径（第２ゲージ径という。以下省略）の大きさによらず、極力小さな径であることが好ましい。これは削岩機の力を、より小さな面積で与えることで削岩機の力を集中し、より削孔速度を向上させ、地金５０が発生している場合は、先行削孔時に地金５０を避けるためである。第１ゲージ径で削孔を先行したあと、第２開孔面６’、第２傾斜開孔面１０’に設置された超硬チップによって、孔を拡大して削孔を進めていく。先行削孔する第１ゲージ径は、超硬チップ２の大きさ、配置等を考慮して、φ３５〜５０ｍｍ程度とする。その時の第１開孔面の径は、φ２０〜３０ｍｍ程度とする。第２ゲージ径がφ７５ｍｍの場合、従来の開孔ビットでは第１開孔面６の面積が２４６２ｍｍ２、超硬チップ数は３個であることから、チップ１個当たりの負担面積は８２１ｍｍ２であり、削岩機の打撃力をＰと規定すると、超硬チップ１個あたりに与える打撃力は、０．３３Ｐとなる。本実施形態１の開孔ビットについては、第１開孔面の面積が、６１６ｍｍ２、超硬チップ数は２個であることから、チップ１個当たりの負担面積は３０８ｍｍ２であり、超硬チップ１個あたりに与える打撃力は、０．５０Ｐとなる。これらより、新型ビットの方が、より小さい面積に対して、より大きな打撃力を与えることができるため、削孔効率が向上する。 The first gauge diameter that can be drilled with the carbide insert 2 installed on the first inclined drilling surface 10 is the required drilling diameter (the first) in order to improve straightness and reduce the influence of bullion and the like during drilling. Regardless of the size of 2 gauge diameter (hereinafter omitted), it is preferable that the diameter is as small as possible. This concentrates the force of the rock drill by applying the force of the rock drill in a smaller area, further improves the drilling speed, and if the bullion 50 is generated, the bullion at the time of the preceding drilling. This is to avoid 50. After the drilling is preceded by the first gauge diameter, the hole is expanded and the drilling is advanced by the carbide inserts installed on the second drilling surface 6'and the second inclined drilling surface 10'. The diameter of the first gauge to be drilled in advance is about φ35 to 50 mm in consideration of the size and arrangement of the cemented carbide insert 2. The diameter of the first opening surface at that time is about φ20 to 30 mm. When the second gauge diameter is φ75 mm, the area of the first perforated surface 6 is 2462 mm2 and the number of cemented carbide chips is 3 in the conventional perforated bit, so the load area per chip is 821 mm2. If the striking force of the rock drill is defined as P, the striking force given to each carbide tip is 0.33P. Regarding the perforation bit of the first embodiment, since the area of the first perforation surface is 616 mm2 and the number of cemented carbide chips is 2, the burden area per chip is 308 mm2, and the cemented carbide chip 1 The striking force given to each piece is 0.50P. From these, the new bit can give a larger striking force to a smaller area, so that the drilling efficiency is improved.
図５の（ａ）は本実施形態２の開孔ビット１の平面図、図５の（ｂ）は本実施形態２の開孔ビット１の正面図を示す。図６は本実施形態２の開孔ビットの断面図を示す。図６は実施形態２の開孔ビット１のＡ−Ａの断面図を示す。本実施形態２の開孔ビット１は実施形態１と同様に、超硬チップ２、噴出口３、繰粉排出溝４、ロッド取付部５、第１開孔面６、中空部７、開孔口８、突出端面９、第１傾斜開孔面１０、第２傾斜開孔面１０’を有する。ただし、本実施形態２は、実施形態１で前述した第２開孔面６’は有しない開孔ビットの例である。 5A is a plan view of the opening bit 1 of the second embodiment, and FIG. 5B is a front view of the opening bit 1 of the second embodiment. FIG. 6 shows a cross-sectional view of the opening bit of the second embodiment. FIG. 6 shows a cross-sectional view of AA of the opening bit 1 of the second embodiment. The opening bit 1 of the second embodiment is the same as that of the first embodiment, that is, the carbide tip 2, the spout 3, the powder discharge groove 4, the rod mounting portion 5, the first opening surface 6, the hollow portion 7, and the opening. It has a mouth 8, a protruding end surface 9, a first inclined opening surface 10, and a second inclined opening surface 10'. However, the second embodiment is an example of the opening bit that does not have the second opening surface 6'described in the first embodiment.
本実施形態２の前記超硬チップ２は略鋭円錐形長形状で、先端部は丸みを帯びた略球面形状である。また、前記ロッド取付部５は開孔ビット１の中心軸線を共有するものである（厳密に同一の中心軸線を共有するものではなくても良い）。本実施形態２のロッド取付部は円柱形状のものを使用する。 The cemented carbide tip 2 of the second embodiment has a substantially sharp conical elongated shape, and the tip portion has a substantially spherical shape with a rounded shape. Further, the rod mounting portion 5 shares the central axis of the opening bit 1 (it does not have to share exactly the same central axis). The rod mounting portion of the second embodiment uses a cylindrical shape.
本実施形態２の開孔ビット１は、台金を先端側から後端側にかけて順に異なる高さに第１開孔面６、第１傾斜開孔面１０、第２傾斜開孔面１０’の３つの開孔面となるように形成する。第１開孔面６は充填マッドを掘削する際に充填マッドの接触面と略水平となるように形成され（開孔ビット１後端面と略水平）、第１傾斜開孔面１０と第２傾斜開孔面１０’は第１開孔面６に対して所定の角度で傾斜する形状である。第１傾斜開孔面１０と第２傾斜開孔面１０’の傾斜角度は特に限定するものではないが、第１開孔面６に対してそれぞれ２３〜４５°であることがより効率よく充填マッド材を砕くことができるといった理由でより好ましく、それぞれが異なる角度でもよい。なお、本実施形態２においては第１開孔面６に対して約３０°の角度で傾斜している第１傾斜開孔面１０と第２傾斜開孔面１０’を使用した。また、第１傾斜開孔面１０と第２傾斜開孔面１０’とは、開孔ビットの長さ方向に一定の高さを設けて段差を有した状態で形成する。この段差は、第１傾斜開孔面１０の最外周の箇所から長手方向に所定の高さで段差を設ける。本段差の高さについては特に限定されるものではなく、開孔ビット１の長さ方向の高さに応じて適宜選択する（開孔ビット１を先端側から見たさいの幅が１００φ以下の場合で５ｍｍ~２ｃｍ程度）。また、本実施形態２の開孔ビット１を先端側から見たときに、第１開孔面の最外周に隣接するように第１傾斜開孔面１０の最内周が形成され、これらは第１開孔面６の最外周と第１傾斜開孔面１０の最内周が略同一円状となるように形成される。また、開孔ビット１を先端側から見たときに、第１傾斜開孔面１０の最外周に隣接するように第２傾斜開孔面１０’の最内周が形成され、これらは第１傾斜開孔面１０の最外周と第２傾斜開孔面１０’の最内周が略同一円状となるように形成される。なお、これらは厳密に同一円状となる必要はなく、成形等の際に若干のずれなどが生じる場合もあり得る。また、第１開孔面６、第１傾斜開孔面１０、第２傾斜開孔面１０’の４つの開孔面は先端側から見て略同心円となるように形成することにより、より充填マッドを均一かつ効率的に開孔できる点で好ましい。 In the opening bit 1 of the second embodiment, the base metal is placed at different heights in order from the front end side to the rear end side of the first opening surface 6, the first inclined opening surface 10, and the second inclined opening surface 10'. It is formed so as to have three open surfaces. The first opening surface 6 is formed so as to be substantially horizontal to the contact surface of the filling mud when excavating the filling mud (approximately horizontal to the rear end surface of the opening bit 1), and the first inclined opening surface 10 and the second. The inclined opening surface 10'has a shape that is inclined at a predetermined angle with respect to the first opening surface 6. The inclination angle of the first inclined opening surface 10 and the second inclined opening surface 10'is not particularly limited, but it is more efficiently filled to be 23 to 45 ° with respect to the first inclined opening surface 6, respectively. It is more preferable because the mud material can be crushed, and each may have a different angle. In the second embodiment, the first inclined opening surface 10 and the second inclined opening surface 10'that are inclined at an angle of about 30 ° with respect to the first opening surface 6 are used. Further, the first inclined opening surface 10 and the second inclined opening surface 10'are formed in a state where a constant height is provided in the length direction of the opening bit and a step is provided. This step is provided at a predetermined height in the longitudinal direction from the outermost peripheral portion of the first inclined opening surface 10. The height of this step is not particularly limited, and is appropriately selected according to the height of the perforation bit 1 in the length direction (the width when the perforation bit 1 is viewed from the tip side is 100φ or less). In some cases, about 5 mm to 2 cm). Further, when the opening bit 1 of the second embodiment is viewed from the tip side, the innermost circumference of the first inclined opening surface 10 is formed so as to be adjacent to the outermost outer circumference of the first opening surface, and these are formed. The outermost circumference of the first opening surface 6 and the innermost circumference of the first inclined opening surface 10 are formed to have substantially the same circular shape. Further, when the opening bit 1 is viewed from the tip side, the innermost circumference of the second inclined opening surface 10'is formed so as to be adjacent to the outermost outer circumference of the first inclined opening surface 10, and these are the first. The outermost circumference of the inclined opening surface 10 and the innermost circumference of the second inclined opening surface 10'are formed to have substantially the same circular shape. It should be noted that these do not have to be exactly the same circle shape, and there may be a slight deviation or the like during molding or the like. Further, the four opening surfaces of the first opening surface 6, the first inclined opening surface 10, and the second inclined opening surface 10'are formed so as to be substantially concentric when viewed from the tip side, thereby further filling. It is preferable in that the mud can be opened uniformly and efficiently.
本実施形態２の開孔ビット１は、第１開孔面６の表面積（超硬チップ２を取付けた箇所の表面積も含む、以下同じ）が、第１傾斜開孔面１０、第２傾斜開孔面１０’それぞれの開孔面の表面積よりも小さいものである。また、第１傾斜開孔面１０の表面積は第２傾斜開孔面１０’の表面積よりも小さいものである。また、第１開孔面６の表面積が、第１傾斜開孔面１０の表面積に対して約４０％〜７０％の範囲内、第２傾斜開孔面１０’の表面積に対して約１０〜５０％の範囲内であることが、充填マッド開孔時の直進性や掘削性の向上や、出銑マッド内に混在する地金等の高硬度の異物を避けつつ開孔を継続できる点でより優れる。なお、本実施形態においては、第１開孔面６の表面積は約６１６ｍｍ２、第１傾斜開孔面１０の表面積は約１１１９ｍｍ２、第２傾斜開孔面１０’の表面積は約１５８３ｍｍ２の開孔ビットを使用した。 The opening bit 1 of the second embodiment has the surface area of the first opening surface 6 (including the surface area of the portion where the cemented carbide tip 2 is attached, the same applies hereinafter) of the first inclined opening surface 10 and the second inclined opening. The hole surface 10'is smaller than the surface area of each opening surface. Further, the surface area of the first inclined opening surface 10 is smaller than the surface area of the second inclined opening surface 10'. Further, the surface area of the first inclined hole surface 6 is in the range of about 40% to 70% with respect to the surface area of the first inclined hole surface 10, and about 10 to 10% with respect to the surface area of the second inclined hole surface 10'. Within the range of 50%, the straightness and excavability at the time of opening the filling mud can be improved, and the opening can be continued while avoiding high-hardness foreign substances such as bullion mixed in the tapping mud. Better. In the present embodiment, the surface area of the first inclined opening surface 6 is about 616 mm2, the surface area of the first inclined opening surface 10 is about 1119 mm2, and the surface area of the second inclined opening surface 10'is about 1583 mm2. It was used.
本実施形態２の開孔ビット１には超硬チップ２を８個使用し、そのうちの２個は開孔ビット１の第１開孔面６に、３個は開孔ビット１の第１傾斜開孔面１０に、３個は開孔ビット１の第２傾斜開孔面１０’に植設した。各超硬チップは、各開孔面表面上に超硬チップ２の各軸心が表面に対して略垂直となるように形成する。また、これらの超硬チップ２は、開孔ビット１の先端方向から見て、第１開孔面に植設された超硬チップ２を基準に、順次螺旋状となるように形成する。本発明において植設する方法は特に限定するものではないが、銀ろう・黄銅ろうや真鍮ろうでろう付けする方法や溶接で固定させることができる。 Eight carbide tips 2 are used for the opening bit 1 of the second embodiment, two of which are on the first opening surface 6 of the opening bit 1 and three of which are the first inclinations of the opening bit 1. Three were planted on the opening surface 10 and on the second inclined opening surface 10'of the opening bit 1. Each cemented carbide tip is formed on the surface of each perforated surface so that each axis of the cemented carbide tip 2 is substantially perpendicular to the surface. Further, these cemented carbide tips 2 are formed in a spiral shape in order with reference to the cemented carbide tip 2 planted on the first opening surface when viewed from the tip direction of the opening bit 1. The method of planting in the present invention is not particularly limited, but it can be fixed by brazing with silver brazing, brass brazing or brass brazing, or by welding.
本実施形態２の開孔ビット１において、第１傾斜開孔面１０に設置された超硬チップ２で削孔できる第１ゲージ径は、直進性を向上させ、地金等の影響を削孔時に少なくするために、必要削孔径（第２ゲージ径という。以下省略）の大きさによらず、極力小さな径であることが好ましい。これは削岩機の力を、より小さな面積で与えることで削岩機の力を集中し、より削孔速度を向上させ、地金５０が発生している場合は、先行削孔時に地金５０を避けるためである。第１ゲージ径で削孔を先行したあと、第２傾斜開孔面１０’に設置された超硬チップによって、孔を拡大して削孔を進めていく。先行削孔する第１ゲージ径は、超硬チップ２の大きさ、配置等を考慮して、φ３５〜５０ｍｍ程度とする。その時の第１開孔面の径は、φ２０〜３０ｍｍ程度とする。第２ゲージ径がφ６５ｍｍの場合、従来の開孔ビットでは第１開孔面６の面積が１７３５ｍｍ２、超硬チップ数は３個であることから、チップ１個当たりの負担面積は５７８ｍｍ２であり、削岩機の打撃力をＰと規定すると、超硬チップ１個あたりに与える打撃力は、０．３３Ｐとなる。新型ビットについては、第１開孔面の面積が、６１６ｍｍ２、超硬チップ数は２個であることから、チップ１個当たりの負担面積は３０８ｍｍ２であり、超硬チップ１個あたりに与える打撃力は、０．５０Ｐとなる。これらより、新型ビットの方が、より小さい面積に対して、より大きな打撃力を与えることができるため、削孔効率が向上する。 In the perforation bit 1 of the second embodiment, the first gauge diameter that can be drilled by the cemented carbide tip 2 installed on the first inclined perforation surface 10 improves the straightness and drills the influence of the bare metal or the like. In order to reduce the number of holes, it is preferable that the diameter is as small as possible regardless of the required drilling diameter (referred to as the second gauge diameter; hereinafter omitted). This concentrates the force of the rock drill by applying the force of the rock drill in a smaller area, further improves the drilling speed, and if the bullion 50 is generated, the bullion at the time of the preceding drilling. This is to avoid 50. After the drilling is preceded by the first gauge diameter, the hole is expanded and the drilling is advanced by the carbide tip installed on the second inclined hole opening surface 10'. The diameter of the first gauge to be drilled in advance is about φ35 to 50 mm in consideration of the size and arrangement of the cemented carbide insert 2. The diameter of the first opening surface at that time is about φ20 to 30 mm. When the second gauge diameter is φ65 mm, the area of the first hole surface 6 is 1735 mm2 and the number of cemented carbide chips is 3 in the conventional hole bit, so the load area per chip is 578 mm2. If the striking force of the rock drill is defined as P, the striking force given to each carbide tip is 0.33P. Since the area of the first hole surface of the new bit is 616 mm2 and the number of carbide chips is 2, the burden area per chip is 308 mm2, and the striking force given to each carbide chip. Is 0.50P. From these, the new bit can give a larger striking force to a smaller area, so that the drilling efficiency is improved.
本実施形態１と２の開孔ビット１の超硬チップ２は、第１開孔面６と第２開孔面６’では充填マッドに超硬チップ２の中心軸が略垂直に接触する様に植設される。第１傾斜開孔面１０と第１傾斜開孔面１０’は第１開孔面６に対して傾斜角度を有することから、充填マッドには所定の各度で充填マッドに接触されることになる。なお、開孔ビット１を先端部から見た際に、第１傾斜開孔面１０と第１傾斜開孔面１０’のそれぞれの最外周から各傾斜開孔面に超硬チップ２の一部が外側になるように開孔ビット１に植設することが、開孔ビット１の耐久面からも好ましい。 In the carbide tip 2 of the opening bit 1 of the first and second embodiments, the central axis of the carbide tip 2 contacts the filling mud substantially vertically on the first opening surface 6 and the second opening surface 6'. Will be planted in. Since the first inclined opening surface 10 and the first inclined opening surface 10'have an inclination angle with respect to the first opening surface 6, the filling mud is brought into contact with the filling mud at a predetermined degree. Become. When the opening bit 1 is viewed from the tip end portion, a part of the carbide tip 2 is formed on each inclined opening surface from the outermost periphery of each of the first inclined opening surface 10 and the first inclined opening surface 10'. It is preferable to plant the perforated bit 1 so that is on the outside from the viewpoint of durability of the perforated bit 1.
本実施形態１と２において、開孔ビット１の略円錐形上の頂点の開き角αが約７０°の超硬チップ２を開孔ビット先端面の中心部に植設し真鍮ろうで固定する。本実施形態では上記形状の開孔ビットを使用したが、略円錐形上の頂点の開き角αは、超硬チップ２の中心軸が充填マッド４０に当たる角度は９０°が最も効率的に砕削できることや、ゲージチップと台金との関係（開孔ビットの最外径となる箇所の関係）から７０〜１２０°のものが好ましい。なお、開孔ビット１の径は出銑量に応じて５０〜１２０ｍｍを使用することがある。 In the first and second embodiments, a cemented carbide tip 2 having an opening angle α of the apex on the substantially conical shape of the opening bit 1 of about 70 ° is planted in the center of the tip surface of the opening bit and fixed with brass brazing. .. In the present embodiment, the opening bit having the above shape is used, but the opening angle α of the apex on the substantially conical shape is most efficiently crushed at an angle where the central axis of the super hard chip 2 hits the filling mud 40 at 90 °. From the viewpoint of what can be done and the relationship between the gauge tip and the base metal (relationship of the outermost diameter of the perforated bit), the one having a temperature of 70 to 120 ° is preferable. The diameter of the opening bit 1 may be 50 to 120 mm depending on the amount of tapping.
本実施形態１と２の開孔ビット１には前記中空部７に通じる水の噴出口３を開口した。当該噴出口３を設けることにより、前述の通り開孔作業により発生した充填マッドの砕削屑等を、噴出口３から水をはじめ圧縮水や圧縮空気等を供給することによって繰粉排出溝４を通じて開孔口からに排出することができ、さらに開孔ビット１を冷却する効果もある。 A water spout 3 leading to the hollow portion 7 is opened in the opening bits 1 of the first and second embodiments. By providing the spout 3, as described above, the crushed debris of the filling mud generated by the perforation work is supplied from the spout 3 with compressed water, compressed air, etc. It can be discharged from the opening through the opening, and also has the effect of cooling the opening bit 1.
本実施形態１と２の開孔ビット１には繰粉排出溝４を設ける。本実施形態の繰粉排出溝４は、当該開孔ビット１の外周を複数に分けた状態（例えば本実施例では３等分としたが、２等分や３等分以上としてもよいし、等分としなくてもよい。）で、前記開孔ビット１の第２開孔面６’より下端にわたってその外周面を略円弧上に切り欠くように繰粉排出溝部４を設けた形状をしている。また当該繰粉排出溝部４は先端部から後端部に向かうにつれて、開孔ビット１の外周側に向かって切り欠きを形成された状態となる。すなわち、本実施形態の開孔ビット１の外周面には、前記繰粉排出溝部４（合計３ヵ所）と、隣り合う繰粉排出溝部４の間にそれぞれ形成される突出端面９（合計３ヵ所）とが形成され、前記繰粉排出溝部と同じ数だけ形成されることになる。なお、本実施例では前記繰粉排出溝部４および突出端面９の数は、ともに３つずつであり、これにより、開孔ビット１本体の平面視は繰粉排出溝部４の箇所が中央に向かって凹んだ状態となる。従って、本実施形態では繰粉排出溝部は図１（ａ）で示すように平面図で見た際に略円弧状で切り欠いた形状となる。また、本実施形態の繰粉排出溝４は、本実施形態の繰粉排出溝４は従来の開孔ビットと比較して２倍程度の表面積を設けた。これにより、繰粉の排出量を増やすことが可能となり、削孔効率が増加する点で好ましい。 The perforated bit 1 of the first and second embodiments is provided with a powder discharge groove 4. The powder discharge groove 4 of the present embodiment is in a state where the outer periphery of the opening bit 1 is divided into a plurality of parts (for example, in this embodiment, it is divided into three equal parts, but it may be divided into two equal parts or three equal parts or more. It is not necessary to divide the bit into equal parts.), And the outer peripheral surface of the opening bit 1 is provided with a powder discharge groove portion 4 so as to cut out in a substantially arc shape from the lower end of the second opening surface 6'. ing. Further, the powder discharge groove portion 4 is in a state in which a notch is formed toward the outer peripheral side of the opening bit 1 from the front end portion to the rear end portion. That is, on the outer peripheral surface of the perforated bit 1 of the present embodiment, the protruding end faces 9 (total of 3 places) formed between the powder discharge groove portions 4 (total of 3 places) and the adjacent powder discharge groove portions 4 are formed. ) And are formed, and the same number as the powder discharge groove portions are formed. In this embodiment, the number of the powder discharge groove portion 4 and the number of the protruding end faces 9 are both three, so that the location of the powder discharge groove portion 4 faces the center in the plan view of the opening bit 1 main body. It becomes a dented state. Therefore, in the present embodiment, the powder discharge groove portion has a substantially arc-shaped notch shape when viewed in a plan view as shown in FIG. 1A. Further, in the powder discharge groove 4 of the present embodiment, the powder discharge groove 4 of the present embodiment is provided with a surface area of about twice that of the conventional opening bit. This makes it possible to increase the amount of milled powder discharged, which is preferable in that the drilling efficiency is increased.
本実施形態１と２の開孔ビット１は、溶鉱炉の出銑口に充填されているマッドを開孔する際に使用される一般的な中空ロッド２０と接続される。開孔ビットと中空ロッドの取り付け方は特に限定されるものではなく、ロッド取付部５を開孔ビット１の後端面（底面）に突設してこのロッド取付部５とロッドの先端面を溶接したり、ロッド取付部５の内部に雌ねじを形成し、中空ロッド先端に設けた雄ねじと螺合させて接続させたり、ロッド取付部５の外部表面に雄ねじを形成し、中空ロッド先端に凹状に設けた雌ねじと螺合させて接続させたりすることもできる。なお、本実施形態では、ロッド取付部５の外部表面に雄ねじを形成し、中空ロッド先端に凹状に設けた雌ねじと螺合させて接続させた。 The opening bit 1 of the first and second embodiments is connected to a general hollow rod 20 used for opening a mud filled in a tap of a blast furnace. The method of mounting the perforated bit and the hollow rod is not particularly limited, and the rod mounting portion 5 is projected onto the rear end surface (bottom surface) of the perforated bit 1 and the rod mounting portion 5 and the tip surface of the rod are welded. Or, a female screw is formed inside the rod mounting portion 5 and screwed into a male screw provided at the tip of the hollow rod to connect the rod, or a male screw is formed on the outer surface of the rod mounting portion 5 to form a concave shape at the tip of the hollow rod. It can also be connected by screwing it with the provided female screw. In the present embodiment, a male screw is formed on the outer surface of the rod mounting portion 5, and is screwed with a female screw provided in a concave shape at the tip of the hollow rod to connect the rod.
本実施形態１と２の開孔ビット１は、溶鉱炉の出銑口に充填されているマッドを開孔する際に使用される一般的な中空ロッド２０と接続される。本実施形態では、ロッド取付部５を開孔ビット１の後端面（底面）に突設してこのロッド取付部５とロッドの先端面を溶接によって接合した。なお、開孔ビットと中空ロッドの取り付け方は特に限定されるものではなく、ロッド取付部５の内部に雌ねじを形成し、中空ロッド先端に設けた雄ねじと螺合させて接続させたり、ロッド取付部５の外部表面に雄ねじを形成し、中空ロッド先端に凹状に設けた雌ねじと螺合させて接続させたりすることもできる。 The opening bit 1 of the first and second embodiments is connected to a general hollow rod 20 used for opening a mud filled in a tap of a blast furnace. In the present embodiment, the rod mounting portion 5 is projected from the rear end surface (bottom surface) of the opening bit 1 and the rod mounting portion 5 and the tip surface of the rod are joined by welding. The method of attaching the perforated bit and the hollow rod is not particularly limited, and a female screw is formed inside the rod attachment portion 5 and screwed with a male screw provided at the tip of the hollow rod to connect the rod. It is also possible to form a male screw on the outer surface of the portion 5 and screw it into a female screw provided in a concave shape at the tip of the hollow rod to connect the rod.
図３は、本実施形態の開孔ビット１をロッド２０に装着して出銑口に充填されているマッドを開孔する状態の概略図を示す。当該ロッド２０の開孔ビット１が装着される端部と反対の他方端側は図示しない出銑口開孔機に接続されている。出銑口開孔機に支持した中空ロッド２０及び開孔ビット１を溶鉱炉の出銑口の中心線に沿って回転させながら前進させ、出銑口開孔機による打撃力を、ロッドを通じて開孔ビットに加えることによって当該開孔ビット１の先端部に取り付けた超硬チップ２から出銑口の充填マッド内に中心線に沿って推進する。この際に、開孔ビット１の上端側の先端に超硬チップ（鋭円錐形長形状）を設け、かつ、前述の通り多段（本実施形態では４つの開孔面）の開孔面を有しているため、当該チップ先端の球面が中心線内にあって円錐側面が充填マッドを押圧し、該長チップは中心線から外れることなく打撃力と回転力とによって中心線の方向に前進する。それと同時に開孔ビット１の上端側から中部にかけての円錐状の外周面に形成した超硬チップ２が打撃・回動しつつ、充填マッドを砕削し、砕削屑は噴出口３から高圧噴出される空気や水によって前記繰粉排出溝から出銑口外に排出され、これを継続して中心線の方向に出銑口が一段階の操作で開孔される。なお、本実施形態で使用する中空ロッド２０の長さは約６~６．５ｍ、外径φ３４~４２．７ｍｍであって、当該ロッド２０の先端に中心軸線を共有する開孔ビット１の後端面を接続する。 FIG. 3 shows a schematic view of a state in which the opening bit 1 of the present embodiment is attached to the rod 20 to open the mud filled in the tap. The other end side of the rod 20 opposite to the end on which the opening bit 1 is mounted is connected to a tap hole opening machine (not shown). The hollow rod 20 and the opening bit 1 supported by the ironing port opening machine are advanced while rotating along the center line of the ironing port of the blast furnace, and the striking force of the ironing port opening machine is applied to the hole through the rod. By adding it to the bit, it is propelled along the center line from the super hard tip 2 attached to the tip of the perforated bit 1 into the filling mud of the tap. At this time, a carbide tip (sharp conical long shape) is provided at the tip of the opening bit 1 on the upper end side, and as described above, a multi-stage (four opening surfaces in this embodiment) opening surfaces are provided. Therefore, the spherical surface at the tip of the tip is inside the center line and the side surface of the cone presses the filling mud, and the long tip advances in the direction of the center line by the striking force and the rotational force without deviating from the center line. .. At the same time, the carbide tip 2 formed on the conical outer peripheral surface from the upper end side to the middle portion of the perforated bit 1 crushes the filled mud while striking and rotating, and the crushed waste is ejected from the ejection port 3 at high pressure. The air or water is discharged from the milling discharge groove to the outside of the tap, and the tap is continuously opened in the direction of the center line by a one-step operation. The length of the hollow rod 20 used in the present embodiment is about 6 to 6.5 m, the outer diameter is φ34 to 42.7 mm, and after the opening bit 1 sharing the central axis with the tip of the rod 20. Connect the end faces.
図４は本実施形態１の開孔ビット１が充填マッド４０を開孔する状態の示す概略図を示す。ＳＴＥＰ１では、開孔ビット１の先端の第１開孔面６に設けた超硬チップ２で、第１傾斜開孔面１０に設けた超硬チップ２が充填マッド４０に達するまでの間掘削して開孔を行う。本実施形態においてはこのときの開孔口の径は約２８ｍｍとなる。ＳＴＥＰ２では、第１開孔面６に設けた超硬チップ２と第１傾斜開孔面１０に設けた超硬チップ２で、第１傾斜開孔面１０’に設けた超硬チップ２が充填マッド４０に達するまでの間掘削して開孔を行う。本実施形態においてはこのときの開孔口の径は約４７ｍｍとなる。ＳＴＥＰ３では、第１開孔面６に設けた超硬チップ２と第１傾斜開孔面１０に設けた超硬チップ２と第２開孔面６’で、第２傾斜開孔面１０’に設けた超硬チップ２が充填マッド４０に達するまでの間掘削して開孔を行う。ＳＴＥＰ４では、第１開孔面６に設けた超硬チップ２と第１傾斜開孔面１０に設けた超硬チップ２と第２開孔面６’に設けた超硬チップ２と第２傾斜開孔面１０’に設けた超硬チップ２で、本実施形態の開孔ビット１の最外周までの間掘削して開孔を行う。本実施形態においてはこのときの開孔口の径は約７５ｍｍとなる。以上のような段階を経て、本実施形態の開孔ビット１をロッド２０に装着して出銑口に充填されているマッドを開孔する。 FIG. 4 shows a schematic view showing a state in which the opening bit 1 of the first embodiment opens the filling mud 40. In STEP 1, the carbide tip 2 provided on the first opening surface 6 at the tip of the opening bit 1 is excavated until the carbide tip 2 provided on the first inclined opening surface 10 reaches the filling mud 40. To open a hole. In the present embodiment, the diameter of the opening at this time is about 28 mm. In STEP 2, the carbide tip 2 provided on the first inclined hole surface 6 and the carbide tip 2 provided on the first inclined hole surface 10 are filled with the carbide tip 2 provided on the first inclined hole surface 10'. Excavate and open holes until the mud 40 is reached. In the present embodiment, the diameter of the opening at this time is about 47 mm. In STEP3, the carbide tip 2 provided on the first open hole surface 6, the carbide tip 2 provided on the first inclined open hole surface 10 and the second open hole surface 6'are formed on the second inclined open hole surface 10'. Drilling is performed until the provided carbide tip 2 reaches the filling mud 40. In STEP 4, the carbide tip 2 provided on the first opening surface 6, the carbide tip 2 provided on the first inclined opening surface 10, the carbide tip 2 provided on the second opening surface 6', and the second inclination The carbide tip 2 provided on the opening surface 10'is drilled to the outermost circumference of the opening bit 1 of the present embodiment to open a hole. In the present embodiment, the diameter of the opening at this time is about 75 mm. Through the above steps, the opening bit 1 of the present embodiment is attached to the rod 20 to open the mud filled in the tap.
図７は従来の開孔ビット６０を示す。図７（ａ）は従来の開孔ビット６０の平面図、図７（ｂ）は従来の開孔ビット６０の正面図を示す。図７において、２は充填マッドを削る超硬チップ、３は空気や水等の噴出口、４は充填マッドを掘削することにより発生する繰粉を排出するための繰粉排出溝、５はロッドを取り付けるためのロッド取付部、９は突出端部を示す。本実施形態の開孔ビット１と異なり、先端の開孔面の表面積が広く、２つの開孔面を有するものである。また、先端の開孔面に直結する形で第２の開孔面が設けられ、繰粉排出溝部の表面積も狭い点で本実施形態の開孔ビット１とは異なる。 FIG. 7 shows a conventional opening bit 60. FIG. 7A shows a plan view of the conventional opening bit 60, and FIG. 7B shows a front view of the conventional opening bit 60. In FIG. 7, 2 is a cemented carbide tip for scraping the filling mud, 3 is an outlet for air, water, etc., 4 is a milling discharge groove for discharging the milling generated by excavating the filling mud, and 5 is a rod. A rod mounting portion for mounting the rod, and 9 indicates a protruding end portion. Unlike the perforation bit 1 of the present embodiment, the surface area of the perforation surface at the tip is large and the perforation bit 1 has two perforation surfaces. Further, the second opening surface is provided so as to be directly connected to the opening surface at the tip, and the surface area of the powder discharge groove portion is also narrow, which is different from the opening bit 1 of the present embodiment.
図８は従来の開孔ビット６０が充填マッド４０を開孔する状態の示す概略図を示す。従来の開孔ビット６０は先端の開孔面の表面積が広いため、ＳＴＥＰ１で最初に広い面積（本形態においては４７ｍｍ）を掘削する必要があり、その後でＳＴＥＰ２として第２の開孔面に設けられた超硬チップが充填マッドに接触することになり、次の掘削作業で開孔を行う必要が出てくる（本形態においては６５ｍｍ）。 FIG. 8 shows a schematic view showing a state in which the conventional opening bit 60 opens the filling mud 40. Since the conventional opening bit 60 has a large surface area on the opening surface at the tip, it is necessary to first excavate a large area (47 mm in this embodiment) in STEP 1, and then it is provided on the second opening surface as STEP 2. The cemented carbide tip comes into contact with the filling mud, and it becomes necessary to open a hole in the next excavation work (65 mm in this embodiment).
出銑口を開孔する際に、開孔作業の削孔時に充填マッドの削孔壁にき裂が生じたり、炉内に押し出された充填マッドの一部に横穴が形成されたりする場合がある（図９（ａ）（ｂ））。その後、炉内の溶銑を出銑する際に、このき裂や横穴に溶銑が残り冷えて固まった際に充填マッドの内部に地金が形成されるというのが地金の形成される理由の一つと考えられている（図９（ｃ）（ｄ））。地金が残った状態で次の開孔作業を行う場合は前述の通り不都合が生じるため好ましくない。図８に充填マッドの内部に地金が形成された際の開孔作業の状態を示す。図１０（ａ）は従来の開孔ビットを用いたもので、図１０（ｂ）本実施形態の開孔ビット１を用いたものである。従来の開孔ビットだと地金に当たった際にそのまま後部から前に進む力がかかるため、そのまま地金と反対方向に開孔ビットの進行方向が変わり曲がって進んでいくことになる（図１０（ａ））。これに対して、本実施形態の開孔ビット１を使用した場合、第１開孔面が地金に当たった後に、次の第１の傾斜開孔面が地金に当たるまでの間に第１の開孔面が地金を避けて先の充填マッドを削孔し続けるためそのまま少しずれるだけで直進して開孔作業を続けることが可能になる。従来の開孔ビットの場合は、開孔面と傾斜開孔面に設置されたチップの先端が、ほぼ同一面に設けられることから、開孔ビットのゲージ径内に地金のような金属質の材料が入っていると、削孔性が悪くなり、地金を破砕できずに避けて進行したり（曲がって進行）、超硬チップが地金に接触したりすることで、摩耗が激しくなったり、割れや欠けが著しく激しくなることで、削孔不可の状態になることが考えられる。曲がって削孔を進めると、局部的に削孔径が大きくなり、最悪の場合は炉壁を傷めてしまうことも考えられる。マッド材の充填量を最小限にするためには、同径で削孔を終えることが理想であり、孔壁を傷めないためにも、本実施形態の開孔ビットを使用して直進的に削孔することが求められる。 When opening a tap, a crack may occur in the drilling wall of the filling mud during drilling work, or a horizontal hole may be formed in a part of the filling mud extruded into the furnace. Yes (FIGS. 9 (a) and 9 (b)). After that, when the hot metal in the furnace is ejected, the metal is formed inside the filling mud when the hot metal remains in the cracks and side holes and hardens, which is the reason why the metal is formed. It is considered to be one (Fig. 9 (c) (d)). It is not preferable to perform the next drilling operation with the bare metal remaining because the inconvenience occurs as described above. FIG. 8 shows the state of the hole opening work when the bare metal is formed inside the filling mud. FIG. 10A shows a conventional hole-opening bit, and FIG. 10B shows a hole-opening bit 1 of the present embodiment. With the conventional perforated bit, when it hits the bullion, a force is applied to move forward from the rear as it is, so the advancing direction of the perforated bit changes in the opposite direction to the bullion and the bit moves in a curved manner (Fig.). 10 (a)). On the other hand, when the opening bit 1 of the present embodiment is used, after the first opening surface hits the bullion, the first is before the next first inclined opening surface hits the bullion. Since the opening surface of the hole avoids the bullion and continues to drill the filling mud, it is possible to go straight and continue the hole opening work with only a slight shift. In the case of the conventional perforated bit, since the tip of the chip installed on the perforated surface and the inclined perforated surface is provided on almost the same surface, a metallic material such as a bullion is provided within the gauge diameter of the perforated bit. If this material is included, the drilling property will deteriorate, and the metal will not be able to be crushed and will proceed avoiding it (bending), or the carbide tip will come into contact with the metal, resulting in severe wear. It is conceivable that drilling will not be possible due to the fact that cracks and chips become extremely severe. If the hole is bent and drilled, the drilling diameter will increase locally, and in the worst case, the furnace wall may be damaged. In order to minimize the filling amount of the mud material, it is ideal to finish drilling with the same diameter, and in order not to damage the hole wall, the drilling bit of the present embodiment is used to go straight. It is required to drill holes.
本実施形態の開孔ビットを使用することにより、従来よりも表面積の狭い第１開孔面を設けて充填マッドを掘削するため、充填マッドに楔が入る様に開孔し始めることができ、開孔時の直進性や掘削性を向上させることができる点で優れる。また、同様に表面積の狭い第１開孔面で堀削を進めるため、出銑マッド内に混在する地金（高炉から高温液体状の銑鉄が冷やされた固まったもの等）等の高硬度の異物が存在したとしても、そのまま開孔作業を継続して行うことができる。これにより、開孔時間が増加（状況によっては中断）したり、開孔ビットの消耗が激しくなったりすることもなく、作業効率や経済性の面でも優れるものである。 By using the opening bit of the present embodiment, since the filling mud is excavated by providing the first opening surface having a smaller surface area than the conventional one, it is possible to start opening the filling mud so that a wedge is inserted. It is excellent in that it can improve straightness and excavation at the time of opening. In addition, in order to proceed with excavation on the first open surface, which also has a small surface area, high hardness such as bullion mixed in the pig iron mud (such as chilled and solidified high-temperature liquid pig iron from a blast furnace) Even if a foreign substance is present, the hole opening work can be continued as it is. As a result, the opening time is not increased (interrupted depending on the situation), and the opening bit is not consumed severely, which is excellent in terms of work efficiency and economy.
＜その他の形態例＞
（１）本実施形態においては突起物として超硬チップを使用したが、本発明はこれに限定されるものではない。充填マットの硬さに応じて超硬素材を用いずに鉄や鋼等、台金と同一の素材を用いても良い。例えば、クロムやマンガンを多く含んだ合金鋼（高クロム鋼、高マンガン鋼）や鋳鋼（高クロム鋳鋼、高マンガン鋳鋼）であったり、硬質粒子（超硬粒やサーメット粒）を含んだ合金鋼や鋳鋼なども突起物の材質として考えられる。
（２）本実施形態の開孔ビットは超硬チップ２を植設することにより形成したが、鋳造等で台金と突起物を一体に成形したり、削り出しにより形成したりすることも可能である。
（３）本実施形態では前記超硬チップ２として略鋭円錐形長形状のものを使用したが、特にこれに限定されるものではなく鈍円錐形長形状や三角錐形状等の形状を用いても良い。
（４）本実施形態では、繰粉排出溝部は略円弧状で切り欠いた形状としたが、略Ｖ字状、略三角形状、略凹形状等で切り欠いた形状でも良い。
（５）本実施形態の開孔ビット１には超硬チップ２を８個植設したが、特にこれに限定されるものではなく、８個より少なくても多くても本発明の効果を得られる範囲で使用可能である。また、本実施形態では超硬チップを植設したが、溶接等で取り付けることも可能である。
（６）本実施形態では開孔面が４つの開孔ビットを用いたがそれ以上設けることも可能である。
（７）本実施形態では、繰粉排出溝部として従来のものより表面積が２倍程度のものを使用したがそれに限定されるものではなく、従来品と同様の表面積であっても良い。
<Other form examples>
(1) In the present embodiment, a cemented carbide tip is used as the protrusion, but the present invention is not limited to this. Depending on the hardness of the filling mat, the same material as the base metal, such as iron or steel, may be used without using the cemented carbide material. For example, alloy steel containing a large amount of chromium and manganese (high chrome steel, high manganese steel), cast steel (high chrome cast steel, high manganese cast steel), and alloy steel containing hard particles (ultrahard grains and cermet grains). And cast steel are also considered as materials for protrusions.
(2) The perforated bit of the present embodiment is formed by implanting the cemented carbide tip 2, but it is also possible to integrally mold the base metal and the protrusion by casting or the like, or to form by shaving. Is.
(3) In the present embodiment, the cemented carbide tip 2 has a substantially sharp conical long shape, but the present invention is not particularly limited to this, and a shape such as a blunt conical long shape or a triangular pyramid shape is used. Is also good.
(4) In the present embodiment, the powder discharge groove portion is notched in a substantially arc shape, but may be notched in a substantially V shape, a substantially triangular shape, a substantially concave shape, or the like.
(5) Eight cemented carbide chips 2 are planted in the perforated bit 1 of the present embodiment, but the present invention is not particularly limited to this, and the effect of the present invention can be obtained even if the number is less than or more than eight. It can be used as far as possible. Further, although the carbide tip is planted in this embodiment, it can be attached by welding or the like.
(6) In the present embodiment, a perforation bit having four perforation surfaces is used, but more perforation bits can be provided.
(7) In the present embodiment, the powder discharge groove portion has a surface area about twice that of the conventional one, but the surface area is not limited to that, and the surface area may be the same as that of the conventional product.
１ 開孔ビット
２ 超硬チップ
３ 噴出口
４ 繰粉排出溝
５ ロッド取付部
６ 第１開孔面
６’ 第２開孔面
７ 中空部
８ 開孔口
９ 突出端面
１０ 第１傾斜開孔面
１０’ 第２傾斜開孔面
２０ 中空ロッド
３０ 出銑口
４０ 充填マッド
５０ 地金
６０ 従来の開孔ビット
７０ き裂
８０ 横穴
1 Opening bit 2 Carbide tip 3 Spout 4 Flour discharge groove 5 Rod mounting part 6 1st opening surface 6'2nd opening surface 7 Hollow part 8 Opening port 9 Protruding end surface 10 1st inclined opening surface 10'Second inclined hole surface 20 Hollow rod 30 Iron tap 40 Filling mud 50 Bullion 60 Conventional hole bit 70 Crack 80 Side hole
Claims (10)
当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２傾斜開孔面とを有し、
当該第１開孔面は当該開孔ビットの中心軸と略垂直に設け、
当該第１傾斜開孔面と当該第２傾斜開孔面は当該開孔ビットの後端側に傾斜し、
当該第１開孔面と当該第１傾斜開孔面は隣接し、当該第１傾斜開孔面と当該第２傾斜開孔面は隣接しており、
当該開孔ビット内部には中空部を有し、
前記繰粉排出溝を少なくとも２以上形成し、
前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成され、
前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設される、
ことを特徴とする溶鉱炉の出銑口用開孔ビット。 An opening bit having a milling discharge groove, a protruding end face, a protrusion, and a spout.
The opening bit has a first opening surface, a first inclined opening surface, and a second inclined opening surface from the front end side to the rear end side.
The first opening surface is provided substantially perpendicular to the central axis of the opening bit.
The first inclined opening surface and the second inclined opening surface are inclined toward the rear end side of the opening bit,
The first inclined opening surface and the first inclined opening surface are adjacent to each other, and the first inclined opening surface and the second inclined opening surface are adjacent to each other.
A hollow portion is provided inside the perforated bit.
At least two or more of the milling discharge grooves are formed,
The protruding end face is formed between the adjacent powder discharge groove and the adjacent powder discharge groove.
The protrusion has a substantially sharp conical elongated shape, and at least on each opening surface so that the central axis is substantially perpendicular to the surfaces of the first opening surface, the first inclined opening surface, and the second inclined opening surface. One or more will be planted,
An opening bit for the tap of a blast furnace, which is characterized by this.
当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２開孔面、第２傾斜開孔面とを有し、
当該第１開孔面と当該第２開孔面は当該開孔ビットの中心軸と略垂直に設け、
当該第１傾斜開孔面と当該第２傾斜開孔面は当該開孔ビットの後端側に傾斜し、
当該第１開孔面と当該第１傾斜開孔面は隣接し、当該第１傾斜開孔面と当該第２開孔面は隣接し、当該第２開孔面と当該第２傾斜開孔面は隣接しており、
当該開孔ビット内部には中空部を有し、
前記繰粉排出溝を少なくとも２以上形成し、
前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成され、
前記突起物は略鋭円錐形長形状で前記第１開孔面と第２開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設される、
ことを特徴とする溶鉱炉の出銑口用開孔ビット。 An opening bit having a milling discharge groove, a protruding end face, a protrusion, and a spout.
The opening bit has a first opening surface, a first inclined opening surface, a second opening surface, and a second inclined opening surface from the front end side to the rear end side.
The first opening surface and the second opening surface are provided substantially perpendicular to the central axis of the opening bit.
The first inclined opening surface and the second inclined opening surface are inclined toward the rear end side of the opening bit,
The first inclined opening surface and the first inclined opening surface are adjacent to each other, the first inclined opening surface and the second opening surface are adjacent to each other, and the second opening surface and the second inclined opening surface are adjacent to each other. Are adjacent and
A hollow portion is provided inside the perforated bit.
At least two or more of the milling discharge grooves are formed,
The protruding end face is formed between the adjacent powder discharge groove and the adjacent powder discharge groove.
The protrusion has a substantially sharp conical elongated shape so that the central axis is substantially perpendicular to the surfaces of the first opening surface , the second opening surface , the first inclined opening surface, and the second inclined opening surface. At least one planted on each perforated surface,
An opening bit for the tap of a blast furnace, which is characterized by this.
第１開孔面と第２開孔面は当該開孔ビットの中心軸と略水平となるように設け、
第１傾斜開孔面と第２傾斜開孔面はそれぞれ第１開孔面と第２開孔面に対して所定の角度で傾斜する形状であることを特徴とする請求項２に記載の溶鉱炉の出銑口用開孔ビット。 From the front end side to the rear end side of the perforation bit, four perforation surfaces, a first perforation surface, a first inclined perforation surface, a second perforation surface, and a second inclined perforation surface, are sequentially provided.
The first opening surface and the second opening surface are provided so as to be substantially horizontal to the central axis of the opening bit .
The blast furnace according to claim 2, wherein the first inclined opening surface and the second inclined opening surface are shaped to be inclined at a predetermined angle with respect to the first opening surface and the second opening surface, respectively. Opening bit for the tap.
前記第１傾斜開孔面と前記第２開孔面は開孔ビットの長手方向に所定高さの段差を設けた状態で形成し、当該段差は当該第１傾斜開孔面の最外周の箇所から長手方向に段差を設け、
前記開孔ビットを先端側から見たときに前記第１傾斜開孔面の最外周の箇所から前記第２開孔面の最内周が略同一円状となるように形成し、
前記第２開孔面の最外周に隣接するように前記第２傾斜開孔面の最内周が形成され、
前記第２開孔面の最外周と第２傾斜開孔面の最内周が略同一円状となるように形成されること
を特徴とする請求項２から４のいずれか１項に記載の溶鉱炉の出銑口用開孔ビット。 When the opening bit is viewed from the tip side, the innermost circumference of the first inclined opening surface is formed so as to be adjacent to the outermost outer circumference of the first opening surface, and the outermost circumference of the first opening surface is formed. And the innermost circumference of the first inclined opening surface are formed so as to be substantially the same circle.
The first inclined hole surface and the second inclined hole surface are formed in a state where a step of a predetermined height is provided in the longitudinal direction of the opening bit, and the step is the outermost portion of the first inclined hole opening surface. With a step in the longitudinal direction from
When the opening bit is viewed from the tip side, it is formed so that the innermost circumference of the second opening surface is substantially the same circle from the outermost peripheral portion of the first inclined opening surface.
The innermost circumference of the second inclined hole surface is formed so as to be adjacent to the outermost circumference of the second hole surface.
The invention according to any one of claims 2 to 4, wherein the outermost circumference of the second opening surface and the innermost circumference of the second inclined opening surface are formed so as to have substantially the same circular shape. Opening bit for the tap of the blast furnace .
当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２傾斜開孔面とを有するように形成し、
当該第１開孔面は当該開孔ビットの中心軸と略垂直に設け、
当該第１傾斜開孔面と当該第２傾斜開孔面は当該開孔ビットの後端側に傾斜させるように設け、
当該第１開孔面と当該第１傾斜開孔面は隣接し、当該第１傾斜開孔面と当該第２傾斜開孔面は隣接しており、
当該開孔ビット内部には中空部を設け、
前記繰粉排出溝を少なくとも２以上形成し、
前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成し、
前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設すること、
を特徴とする溶鉱炉の出銑口用開孔ビットの製造方法。 A method for manufacturing an open bit having a powder discharge groove, a protruding end face, a protrusion, and a spout.
The opening bit is formed so as to have a first opening surface, a first inclined opening surface, and a second inclined opening surface from the front end side to the rear end side.
The first opening surface is provided substantially perpendicular to the central axis of the opening bit.
The first inclined opening surface and the second inclined opening surface are provided so as to be inclined toward the rear end side of the opening bit.
The first inclined opening surface and the first inclined opening surface are adjacent to each other, and the first inclined opening surface and the second inclined opening surface are adjacent to each other.
A hollow portion is provided inside the perforated bit,
At least two or more of the milling discharge grooves are formed,
The protruding end face is formed between the adjacent powder discharge groove and the adjacent powder discharge groove.
The protrusion has a substantially sharp conical elongated shape, and at least on each opening surface so that the central axis is substantially perpendicular to the surfaces of the first opening surface, the first inclined opening surface, and the second inclined opening surface. Plant one or more,
A method for manufacturing an opening bit for a tap of a blast furnace .
当該開孔ビットは先端側から後端側にかけて第１開孔面、第１傾斜開孔面、第２開孔面、第２傾斜開孔面とを有するように形成し、
当該第１開孔面と当該第２開孔面は当該開孔ビットの中心軸と略垂直に設け、
当該第１傾斜開孔面と当該第２傾斜開孔面は当該開孔ビットの後端側に傾斜させるように設け、
当該第１開孔面と当該第１傾斜開孔面は隣接し、当該第１傾斜開孔面と当該第２開孔面は隣接し、当該第２開孔面と当該第２傾斜開孔面は隣接しており、
当該開孔ビット内部には中空部を設け、
前記繰粉排出溝を少なくとも２以上形成し、
前記突出端面は隣り合う当該繰粉排出溝との間にそれぞれ形成し、
前記突起物は略鋭円錐形長形状で前記第１開孔面と第１傾斜開孔面と第２傾斜開孔面の表面上に中心軸が略垂直となる様に各開孔面に少なくとも１以上植設すること、
を特徴とする溶鉱炉の出銑口用開孔ビットの製造方法。 A method for manufacturing an open bit having a powder discharge groove, a protruding end face, a protrusion, and a spout.
The opening bit is formed so as to have a first opening surface, a first inclined opening surface, a second opening surface, and a second inclined opening surface from the front end side to the rear end side.
The first opening surface and the second opening surface are provided substantially perpendicular to the central axis of the opening bit.
The first inclined opening surface and the second inclined opening surface are provided so as to be inclined toward the rear end side of the opening bit.
The first inclined opening surface and the first inclined opening surface are adjacent to each other, the first inclined opening surface and the second opening surface are adjacent to each other, and the second opening surface and the second inclined opening surface are adjacent to each other. Are adjacent and
A hollow portion is provided inside the perforated bit,
At least two or more of the milling discharge grooves are formed,
The protruding end face is formed between the adjacent powder discharge groove and the adjacent powder discharge groove.
The protrusion has a substantially sharp conical elongated shape, and at least on each opening surface so that the central axis is substantially perpendicular to the surfaces of the first opening surface, the first inclined opening surface, and the second inclined opening surface. Plant one or more,
A method for manufacturing an opening bit for a tap of a blast furnace .
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