JP4183080B2 - Cutting blade for sponge-like titanium block - Google Patents
Cutting blade for sponge-like titanium block Download PDFInfo
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- JP4183080B2 JP4183080B2 JP2003334928A JP2003334928A JP4183080B2 JP 4183080 B2 JP4183080 B2 JP 4183080B2 JP 2003334928 A JP2003334928 A JP 2003334928A JP 2003334928 A JP2003334928 A JP 2003334928A JP 4183080 B2 JP4183080 B2 JP 4183080B2
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- 238000005520 cutting process Methods 0.000 title claims description 192
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 53
- 239000010936 titanium Substances 0.000 title claims description 53
- 229910052719 titanium Inorganic materials 0.000 title claims description 53
- 238000000034 method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
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Description
本発明は、クロール法、カルシウム還元法などの還元反応で得られた多孔質チタン魂（スポンジ状チタン塊）の切断に使用されるスポンジ状チタン塊用切断刃に関する。 The present invention relates to a cutting blade for a sponge-like titanium lump used for cutting a porous titanium soul (sponge-like titanium lump) obtained by a reduction reaction such as a crawl method or a calcium reduction method.
金属チタンは、通常、ルチル(TiＯ2)または合成ルチルなどを塩化して得られる四塩化チタンをクロール法（マグネシウム還元法）等で還元し、得られるスポンジ状のチタン塊を細かく切断し、これを押し固め、接合して電極を作製し、アーク溶解することにより製造される。 Titanium metal tetrachloride is usually obtained by reducing titanium tetrachloride obtained by chlorinating rutile (TiO 2 ) or synthetic rutile by the crawl method (magnesium reduction method), etc., and finely cutting the resulting sponge-like titanium block. Are produced by arc-melting by pressing and solidifying and joining to produce an electrode.
前記スポンジ状チタン塊の切断は、一般に、スポンジ状チタン塊を油圧プレスの駆動力により切断刃で上から押し切ることにより行われる。クロール法により製造されるスポンジ状チタン塊を例にとると、まず、略円柱状のスポンジ状チタン魂をテーブル上に横向きに載置し、その底部側（還元容器の底部に相当する側）の端付近から切断刃で切断することにより薄い円盤状に切り出し、その後、前記円盤状のスポンジチタンを切断刃でさらに細かく切断する。 The sponge-like titanium lump is generally cut by pressing the sponge-like titanium lump from above with a cutting blade by a driving force of a hydraulic press. Taking a sponge-like titanium lump produced by the crawl method as an example, first, a substantially cylindrical sponge-like titanium soul is placed sideways on a table, and its bottom side (the side corresponding to the bottom of the reducing vessel) By cutting with a cutting blade from the vicinity of the end, it is cut into a thin disk shape, and then the disk-shaped sponge titanium is further cut with a cutting blade.
しかし、この切断工程においては、特に、底部側の端付近から薄い円盤状に切り出す時に刃先部の折損、欠損が生じる。これは、スポンジ状チタン塊の形状がいびつで、不規則な歪みがあるため薄い円盤状に切断する際にスポンジ状チタン塊が急に傾いたり、薄い円盤状の部分が不規則に割れたりするが、その瞬間に刃先部に大きな前後方向（刃の厚み方何）の力がかかることによるものと考えられる。チタンが高靭性であることも一因と考えられ、鋭利な刃先に刃の厚み方何の急激な力がかかることを繰り返す間に、刃先に金属疲労が蓄積することも原因になっていると推測される。スポンジ状チタン塊の底部付近が比較的硬いため切断し難く、大型のバッチではその傾向がとりわけ顕著であり、最近になって前記切断時の刃先部の破損の問題が一層顕在化してきている。 However, in this cutting step, the cutting edge portion is broken or broken particularly when it is cut into a thin disk shape from the vicinity of the end on the bottom side. This is because the shape of the sponge-like titanium lump is irregular and there is irregular distortion, so when cutting into a thin disk shape, the sponge-like titanium lump suddenly tilts, or the thin disk-like part breaks irregularly However, it is considered that a large force in the front-rear direction (how much the blade thickness) is applied to the blade edge at that moment. Titanium is considered to be partly due to its high toughness, and it is also caused by the accumulation of metal fatigue on the cutting edge while repeatedly applying sharp force to the sharp cutting edge. Guessed. Since the vicinity of the bottom of the sponge-like titanium lump is relatively hard, it is difficult to cut, and this tendency is particularly remarkable in large batches. Recently, the problem of breakage of the cutting edge at the time of cutting has become more apparent.
特許文献１には、スポンジチタン搬入方向前方面が傾斜面になった片刃で、かつ、その片刃部分の先端部分のみが、スポンジチタン搬入方向後方面に、前記片刃部分の傾斜面の傾斜角度（通常、鉛直面に対して３０〜４５度）より小さい５〜１０度の傾斜面を有するスポンジチタンの押切りプレス用切断刃が開示されている。この切断刃を塊状スポンジチタンの押切りに用いると、切断刃の逆さ反り（前記搬入方向への反り返り）を生じさせずに１０００時間以上の切断が可能となった旨の記載がなされている。 Patent Document 1 discloses a single-edged blade whose front surface in the sponge titanium carrying direction is an inclined surface, and only the tip portion of the single-edged portion is inclined to the rear surface in the sponge titanium carrying direction (the inclination angle of the inclined surface of the single-edged blade portion). Usually, a cutting blade for press-cutting presses of sponge titanium having an inclined surface of 5 to 10 degrees smaller than 30 to 45 degrees with respect to a vertical surface is disclosed. There is a description that, when this cutting blade is used for the pressing of massive sponge titanium, the cutting blade can be cut for 1000 hours or more without causing the warping of the cutting blade (warping back in the loading direction).
しかし、この切断刃を前記クロール法により製造されるスポンジ状チタン塊の切断（押し切り）に適用しても、長時間の使用は不可能である。これは、前記特許文献１に記載の切断刃が提案された当時は小型のスポンジ状チタン塊の製造が主流であったが、現在では１０トン前後の大型のスポンジ状チタン塊の製造が主流となっており、スポンジ状チタン塊の切断時に刃の厚み方向にかかる力も一層大きくなっていることによるものと考えられる。 However, even if this cutting blade is applied to the cutting (pressing cutting) of a sponge-like titanium lump produced by the crawl method, it cannot be used for a long time. This was because the production of small sponge-like titanium ingots was the mainstream at the time when the cutting blade described in Patent Document 1 was proposed, but at present, the production of large sponge-like titanium ingots of around 10 tons is the mainstream. This is considered to be due to the fact that the force applied in the thickness direction of the blade at the time of cutting the sponge-like titanium lump is further increased.
一方、表面粗さを小さくすることによる長寿命化が有効とされている。特許文献２には、切断刃の表面の粗さ（Ｒy）が１００μｍ以下で、硬度が６０〜７５Ｈｓであるスポンジチタンプレス切断刃が開示され、長期にわたってその切れ味が維持されるとしている。しかし、この切断刃を使用しても前記スポンジ状チタン塊の切断を長時間続けることはできない。
On the other hand, extending the life by reducing the surface roughness is effective.
本発明はこのような状況に鑑みなされたもので、スポンジ状チタン塊を切断する工程において、刃先の破損（折損、欠損）が生じにくく、長寿命で、しかも切断速度が損なわれないスポンジ状チタン塊用切断刃を提供することを目的としている。 The present invention has been made in view of such a situation, and in the step of cutting the sponge-like titanium lump, the blade tip is hardly damaged (broken or broken), has a long life, and does not impair the cutting speed. The object is to provide a lump cutting blade.
本発明者は、上記の課題を解決するために検討を重ねた結果、以下の知見を得た。すなわち、従来は、一般の切断刃と同様に、スポンジ状チタン塊用の切断刃の先端（刃先）は鋭利でなけれは使用に耐えないと考えられていたが、スポンジ状チタン塊を切断する場合においては、切断刃の先端が鋭利ではなく、刃先に所定の「鈍さ」（後述する所定の平坦部幅や刃先上方１ｍｍ部位における所定の厚み）を持たせた方が切断刃の寿命が長く、切断速度（切れ味）にも問題ないことを知見した。これは、従来の切断刃は刃先が鋭いため、そこから亀裂が入り、欠損しやすく、また、その亀裂が刃本体部にまで至って大きく破損する場合もあるが、前記の刃先がある程度の幅や厚みをもった切断刃を用いれば、使用中に多少の磨耗などが発生しつつも切断刃の破損の確率を著しく下げ得ることによるものと考えられる。 As a result of repeated studies to solve the above-described problems, the present inventors have obtained the following knowledge. That is, conventionally, it was thought that the tip of the cutting blade for a sponge-like titanium lump (blade tip) must be sharp, as with a general cutting blade, but it would not be usable, but when cutting a sponge-like titanium lump , The cutting blade tip is not sharp and the cutting edge has a longer life if the cutting edge has a predetermined “dullness” (a predetermined flat portion width to be described later or a predetermined thickness at a 1 mm portion above the cutting edge). It was found that there is no problem with the cutting speed (sharpness). This is because the cutting edge of the conventional cutting blade is sharp and easily cracks and breaks from there, and the crack may reach the blade main body part and be greatly damaged. If a cutting blade having a thickness is used, it is considered that the probability of breakage of the cutting blade can be remarkably reduced while some wear occurs during use.
本発明はこの知見に基づいてなされたもので、その要旨は、下記のスポンジ状チタン塊用切断刃にある。 The present invention has been made based on this finding, the gist thereof is spongy titanium mass cutting blade below follow.
すなわち、押し切りプレスの切断刃として用いられ、刃の本体角度が３０〜５５度のスポンジ状チタン塊用切断刃において、下記（1）式を満たすことを特徴とするスポンジ状チタン塊用切断刃である。
２．５ｍｍ≦刃先から上方１ｍｍの厚み≦１２．０ｍｍ ・・・（1）
That is, used as a cutting blade press cutting press, in spongy titanium mass cutting blade body angle 30 to 55 degrees of the blade, the following equation (1) in spongy titanium mass cutting blade and satisfies the There is .
2.5 mm ≦ thickness 1 mm above the cutting edge ≦ 12.0 mm ( 1 )
この切断刃において、刃の本体角度が３５〜５０度で、刃先から上方１ｍｍの厚みが下記（2）式を満たすものであれば、切断速度を確保するとともに刃の寿命を延ばすことができる。
４．０ｍｍ≦刃先から上方１ｍｍの厚み≦１１．０ｍｍ ・・・（2）
In the cutting blades of this, in the body angle of 35 to 50 degrees of the blade, as long as it satisfies the thickness of the following formula (2) above 1mm from the cutting edge, and extend the life of the blade while securing the disconnect speed it can.
4.0 mm ≦ thickness 1 mm above the blade edge ≦ 11.0 mm ( 2 )
ここで、「刃の本体角度」とは、切断刃の先端（これを、「刃先」という）を下方に向けて保持したときに、刃先から上方へ１０ｍｍ〜２００ｍｍの部分の鉛直方向に対する平均角度をいう。図面を用いて説明すると、切断刃の一部の縦断面を例示する図１において、その（ａ）に示すように、切断刃１の刃の部分は、刃先部３（刃先２からその上方１０ｍｍまでの部分を指す）と刃本体部４からなるが、この刃のａからｂまでの部分の平均角度である。
Here, the “blade body angle” means an average angle with respect to the vertical direction of a portion of 10 mm to 200 mm upward from the blade edge when the tip of the cutting blade (which is referred to as “blade edge”) is held downward. Say. Referring to the drawing, in FIG. 1 exemplifying a longitudinal section of a part of a cutting blade, as shown in FIG. 1A, the blade portion of the cutting blade 1 is a blade edge portion 3 (10 mm above the
図１（ｂ）に示すように、刃本体部４が「片刃」ではなく、両面に傾斜が付いた「両刃」の場合は、「刃の本体角度」は、片面における本体角度Ｂ1と反対側の面における本体角度Ｂ2とを合わせた本体角度Ｂをいう。なお、図示した例では、前記反対側の面の断面形状が直線ではなく、凸状の張り出しを有しているが、この場合は、刃の先端の上方１０ｍｍの部位ｃと２００ｍｍの部位ｄとを結ぶ直線（図中に破線で表示）のなす角度Ｂ2（すなわち、前記反対側の面における刃先から上方へ１０ｍｍ〜２００ｍｍの部分の平均角度）を反対側の面における本体角度とする。 As shown in FIG. 1B, when the blade body 4 is not a “single blade” but a “double blade” with both sides inclined, the “blade body angle” is opposite to the body angle B 1 on one side. It refers to body angle B of the combination of the body angle B 2 in the plane of the side. In the illustrated example, the cross-sectional shape of the opposite surface is not a straight line but has a convex protrusion, but in this case, a portion c of 10 mm above the tip of the blade and a portion d of 200 mm An angle B 2 formed by a straight line (indicated by a broken line in the drawing) (that is, an average angle of a portion of 10 mm to 200 mm upward from the blade edge on the opposite surface) is defined as a main body angle on the opposite surface.
なお、前記図１（ａ）に示すように、刃先２が平坦部を有している場合のその平坦部幅Ｃを「刃先の平坦部幅」という。
Note that, as shown before Symbol Figure 1 (a), it refers to the flat portion width C of the case where the
「刃先から上方１ｍｍの厚み」とは、刃先が平坦であるか否かに関係なく、刃先２の最下端から上方１ｍｍの部位における刃先部３の厚みをいう。図面を用いて説明すると、図１の（ｃ）に示すように、刃先２が両面方向に緩い傾斜を有している場合は、刃先２の最下端ｐから上方へ１．０ｍｍの部位の厚みＡ（この例では、４．２ｍｍ）である。また、図１（ｄ）に示すように、刃先２にテーパが付いている場合も、刃先２の最下端ｑから上方１．０ｍｍの部位の厚みＡ（この例では、４．５ｍｍ）である。
“Thickness 1 mm above the blade edge” refers to the thickness of the blade edge portion 3 at a position 1 mm above the lowest edge of the
本発明のスポンジ状チタン塊用切断刃は、刃先の破損（折損、欠損）が生じにくく長寿命で、しかも切断速度が損なわれることがない。この切断刃は、小型のスポンジ状チタン魂の切断にはもちろん、大型のスポンジ状チタン魂の切断にも有効で、直径１．１ｍ以上、特に直径１．４ｍ以上のスポンジ状チタン塊の切断時に効果が大きい。 The cutting blade for sponge-like titanium ingots according to the present invention is resistant to breakage (breakage or chipping) of the blade, has a long life, and does not impair the cutting speed. This cutting blade is effective not only for cutting small sponge-like titanium souls, but also for cutting large sponge-like titanium souls. Great effect.
以下に、本発明のスポンジ状チタン塊用切断刃について詳細に説明する。 It will be described below in detail with the spongy titanium mass cutting blades of the present invention.
本発明の切断刃は、『押し切りプレスの切断刃として用いられ、刃の本体角度が３０〜５５度のスポンジ状チタン塊用切断刃において、下記（1）式The cutting blade of the present invention is “a cutting blade for a sponge-like titanium lump that is used as a cutting blade of a press-cutting press and has a blade body angle of 30 to 55 degrees.
２．５ｍｍ≦刃先から上方１ｍｍの厚み≦１２．０ｍｍ ・・・（1）2.5 mm ≤ thickness 1 mm above the blade edge ≤ 12.0 mm (1)
を満たすスポンジ状チタン塊用切断刃』である。This is a cutting blade for sponge-like titanium lump that satisfies the requirements.
この切断刃において、刃の本体角度Ｂが３０〜５５度であることを前提とするのは、前記角度が３０度より小さいと使用時に刃先等に亀裂が入りやすいため寿命が短く、５５度より大きいと切断速度（切れ味）が低下し、実用に耐えないからである。この本体角度Ｂは、望ましくは３５〜５０度である。 In this cutting blade, to assume that the body angle B of the blade is 30 to 55 degrees, the angle is small and short life because a crack is likely to tip or the like at the time of use from 30 degrees, from 55 degrees This is because if it is large, the cutting speed (sharpness) is lowered and cannot be practically used. The body angle B is desirably 35 to 50 degrees.
この場合、刃先の平坦部幅Ｃが２．０ｍｍ未満であると刃先から亀裂が入りやすく、１１．０ｍｍを超えると刃先部３が厚すぎて切れ味が悪く、切断速度が低下する。この刃先の平坦部幅Ｃを３．５ｍｍ以上１０．０ｍｍ以下とすれば、刃先部３に適度な厚みをもたせるとともに切れ味を維持することができ、刃先における亀裂の生成を防ぎつつ良好な切断速度を確保することができるので望ましい。 In this case, the flat portion width C of the cutting edge is liable to be cracked from the cutting edge is less than 2.0 mm, more than the poor sharpness in the edge portion 3 too thick 11.0 mm, cutting speed you decrease. If the flat part width C of the cutting edge is 3.5 mm or more and 10.0 mm or less, the cutting edge part 3 can have an appropriate thickness and can maintain a sharpness, and a good cutting speed while preventing generation of cracks in the cutting edge. It is desirable because it can be secured.
なお、従来の切断刃でも、使用により先端が磨耗すれば先端が鈍くなるため寿命が延びることが予想されるが、従来の切断刃では、先端の磨耗が生じる前に破損してしまうため、寿命の延長は期待できない。 Even with conventional cutting blades, if the tip wears down due to use, the tip becomes dull and it is expected that the life will be extended. However, with conventional cutting blades, the tip will be damaged before wear occurs, so the life I cannot expect the extension of.
刃本体部４は、片面だけに傾斜が付いた「片刃」（図１（ａ）参照）でもよいし、両面に傾斜がある「両刃」（図１（ｂ）参照）としてもよい。 The blade body 4 may be a “single blade” (see FIG. 1A) with an inclination on only one side, or a “double edge” (see FIG. 1B) with an inclination on both sides .
本発明の切断刃において、刃先から上方１ｍｍの厚みを前記のように規定するのは、刃先の上方１ｍｍの厚みが２．５ｍｍ未満であると、刃先から亀裂が入りやすく、１２．０ｍｍを超えると切断速度が低下するからである。この刃先の上方１ｍｍの厚みを４．０ｍｍ以上１１．０ｍｍ以下とすれば、刃先部に適度な厚みをもたせるとともに切れ味を維持し、刃先での亀裂の生成を防ぐとともに良好な切断速度を確保できるので望ましい。 In the cutting blade of the present invention, the thickness of 1 mm above the blade edge is defined as described above. If the thickness of 1 mm above the blade edge is less than 2.5 mm, the blade edge easily cracks and exceeds 12.0 mm. and cutting speed is lowered. If the thickness of the upper 1mm of the edge and 4.0mm or 11.0mm or less, maintaining the sharpness with impart a moderate thickness to the blade tip portion, ensure good cutting speed while preventing the generation of cracks in the cutting edge It is desirable because it is possible.
本発明の切断刃において、刃先から上方５ｍｍの厚みが下記（3）式を満たすものであることが更に望ましい。この厚みが５．７ｍｍより小さければ切断刃の寿命が低下するおそれがあり、１３．６ｍｍより大きいと切断速度が低下するおそれがある。
５．７ｍｍ≦刃先から上方５ｍｍの厚み≦１３．６ｍｍ ・・・（3）
In the cutting blade of the present invention, it is more desirable that the thickness 5 mm above the blade edge satisfies the following expression ( 3 ). If this thickness is less than 5.7 mm, the life of the cutting blade may be reduced, and if it is greater than 13.6 mm, the cutting speed may be reduced.
5.7 mm ≦ thickness 5 mm above the blade edge ≦ 13.6 mm (3)
また、本発明の切断刃においては、刃の各部における角度が下記（4）式を満足するものであることが望ましい。なお、「刃先部」とは、前述したように、刃先から（刃先が平坦でない場合は、刃先の最下端から）その上方に１０ｍｍまでの部分をいう。また、ここでいう「刃の本体部分」とは、刃先の上方１０ｍｍから２００ｍｍまでの部分を指す。
刃先部の平均角度≧刃の本体部分の平均角度 ・・・（4）
In the cutting blade of the present invention, it is desirable that the angle at each part of the blade satisfies the following expression ( 4 ). As described above, the “blade edge” refers to a portion up to 10 mm above the blade edge (from the lowermost edge of the blade edge when the blade edge is not flat). Further, the “blade main body portion” referred to here refers to a portion from 10 mm to 200 mm above the blade edge.
Average angle of the blade edge ≥ Average angle of the blade body (4)
すなわち、刃の先端付近の角度は刃の本体部分の角度と同じかまたはそれより大きいことが、刃の強度を高める上からは望ましい。逆に、刃の先端付近の角度が刃本体部の角度より小さいと、強度上間題となる場合がある。 Ie, it is the angle near the tip of the blade is greater than equal to or the angle of the body portion of the blade, is desirable for increasing the strength of the blade. Conversely, if the angle near the tip of the blade is smaller than the angle of the blade body, there may be a problem in strength.
本発明の切断刃において、材質についての制約はなく、従来使用されている材質はいずれも適用できる。 In the cutting blade of the present invention, there is no restriction on the material, and any conventionally used material can be applied.
以上説明したように、本発明の切断刃は、刃の形状、すなわち、所定の本体角度を有する切断刃において、「刃先から上方１ｍｍの厚み」を所定の範囲に規定することによって、切断刃の「切れ味（切断速度）」と「寿命」をともに良好ならしめたものである。 As described above, the cutting blade according to the present invention has a shape of the blade, that is, a cutting blade having a predetermined main body angle, and by defining the “ thickness 1 mm above the blade tip ” within a predetermined range, Both “sharpness (cutting speed)” and “life” are made good.
この切断刃は、クロール法、カルシウム還元法などによる還元反応で得られた多孔質のスポンジ状チタン塊の切断に好適である。特にクロール法で製造されたスポンジ状チタン塊の切断に効果的である。クロール法の還元工程で製造されるスポンジ状チタン塊の切断の際、切断刃に割れや欠けが多発するが、これは、スポンジ状チタン塊の部位による嵩密度の差が極めて大きく、形状も略円柱状とはいえ不定形であるために、切断時に、刃先に前後方向（刃の厚み方向）に不規則かつ大きな力がかかることが原因と考えられる。 This cutting blade is suitable for cutting a porous sponge-like titanium block obtained by a reduction reaction such as a crawl method or a calcium reduction method. In particular, it is effective for cutting sponge-like titanium ingots produced by the crawl method. When cutting a sponge-like titanium lump produced in the reduction process of the crawl method, cracks and chips frequently occur on the cutting blade. It is considered that the reason is that an irregular and large force is applied to the blade edge in the front-rear direction (the blade thickness direction) at the time of cutting because it is indefinite although it is cylindrical.
本発明の切断刃は、刃先部が「刃先から上方１ｍｍの厚み」で規定される厚みを備えていて強度が大きいので、刃の損傷が起こりにくく、長期間にわたって使用可能である。そのため、切断刃の取替に要する補修コストを大幅に削減することができる。 In the cutting blade of the present invention, the blade edge portion has a thickness defined by “thickness 1 mm above the blade edge” and has high strength, so that the blade is hardly damaged and can be used for a long period of time. Therefore, the repair cost required for replacement of the cutting blade can be greatly reduced.
さらに、本発明の切断刃は、切断工程の生産性向上に大きく寄与することができる。すなわち、従来の切断刃の寿命は約１ヶ月であるが、切断刃の交換時期を引き延ばして無理に使用するため、取り替えの数日前には刃先の欠損が生じており、スポンジ状チタン塊の切断（最初の大割り破砕）時には、刃の先端の欠損により切れ味が低下して、チタン塊の端から薄く削り取るような切断しかできず、生産能率の悪化を招いていた。しかし、本発明の切断刃は厚みがあって強度が大きいので、無理な使用をする必要がなく、生産能率を大幅に向上させることが可能である。 Furthermore, the cutting blade of the present invention can greatly contribute to the productivity improvement in the cutting process. In other words, the life of the conventional cutting blade is about one month, but since the cutting blade replacement period is extended and used forcibly, the cutting edge is damaged several days before the replacement, and the sponge-like titanium lump is cut. At the time of (first major crushing), the sharpness was reduced due to the chipping of the edge of the blade, and it was only possible to cut thinly from the end of the titanium lump, leading to deterioration in production efficiency. However, since the cutting blade of the present invention is thick and has high strength, it is not necessary to use it excessively, and the production efficiency can be greatly improved.
表１に示す種々の形状の切断刃を使用して、クロール法により製造されたスポンジ状チタン塊の切断を行い、切断刃の寿命および切断速度（切れ味）を調査した。なお、前記チタン塊は、質量１０トン前後の大型の略円柱状のスポンジ状チタン塊であり、切断の際は、油圧で駆動する押し切りプレスに前記切断刃を取り付け、いずれのケースにおいても同じ荷重をかけた。また、切断作業は一日あたり約１０時間行った。 Using the cutting blades of various shapes shown in Table 1, the sponge-like titanium mass produced by the crawl method was cut, and the life and cutting speed (sharpness) of the cutting blade were investigated. The titanium ingot is a large, substantially cylindrical sponge-like titanium ingot with a mass of about 10 tons. When cutting, the cutting blade is attached to a press drive driven by hydraulic pressure, and the same load is applied in any case. I applied. The cutting operation was performed for about 10 hours per day.
切断刃の形状および調査結果を表１に示す。 The shape of the cutting blade and the survey results are shown in Table 1.
表１における従来例１、比較例１、実施例１および実施例６で使用した切断刃の形状を図２の（ａ）、（ｂ）、（ｃ）および（ｄ）にそれぞれ示す。例えば、実施例６の切断刃で、図２（ｅ）に示すように、刃先２の角の部分にＲ（この場合は、Ｒ＝０．４）を付けたり、面取り加工を施してもよい。また、実施例１８の切断刃は前記の図１（ｄ）に、実施例１９〜２２および比較例６、７の切断刃は前記の図１（ｃ）に示した形状を有している。
The shapes of the cutting blades used in Conventional Example 1, Comparative Example 1, Example 1 and Example 6 in Table 1 are shown in FIGS. 2 (a), (b), (c) and (d), respectively. For example, with the cutting blade of Example 6, as shown in FIG. 2 (e), R (in this case, R = 0.4) may be attached to the corner portion of the
表１において、調査結果の欄の「寿命」は、切断刃を交換するまでの使用に供した日数で表示し、５０日以上であれば良好、そのうちでも、１００日以上であれば極めて良好とし、５０日未満であれば不良とした。 In Table 1, “Life” in the column of the survey result is indicated by the number of days used until the cutting blade is replaced. It is good if it is 50 days or more, and if it is 100 days or more, it is extremely good. If it was less than 50 days, it was judged as defective.
「切断速度」は、切れ味がよく、切断作業を良好に行えた場合を◎印、ある程度の切断速度が確保でき、概ね良好に行えた場合を○印、切断速度が低下もしくは著しく低下した場合を×印（不良）とし、◎印または○印であれば「良好」と評価した。 “Cutting speed” means that the sharpness is good and the cutting work can be performed well, and the cutting speed can be secured to a certain degree, and the cutting speed is marked or markedly decreased. X mark (defect) was evaluated as “good” if ◎ mark or ◯ mark.
また、「総合評価」では、「寿命」が１００日以上、かつ、「切断速度」が◎印であれば極めて良好（◎印）とし、「寿命」が１００日以上でも、「切断速度」が○印の場合、また「切断速度」が◎印でも、「寿命」が５０日以上１００日未満の場合は良好（○印）とした。「寿命」および「切断速度」のいずれか一方または両方が不良の場合、不良（×印）とした。 Also, in the “overall evaluation”, if the “life” is 100 days or more and the “cutting speed” is ◎, it is very good (marked ◎), and even if the “life” is 100 days or more, the “cutting speed” is In the case of ◯ mark, and even when the “cutting speed” is ◎ mark, and the “life” is 50 days or more and less than 100 days, it is judged as good (marked ◯). When one or both of “life” and “cutting speed” were defective, it was determined as defective (×).
表１の結果から明らかなように、実施例１〜２２で使用した本発明で規定する条件を満たす切断刃は、いずれも刃の「寿命」は５０日以上、「切断速度」は◎印または○印で、良好であった。 As is apparent from the results in Table 1, all of the cutting blades satisfying the conditions defined in the present invention used in Examples 1 to 22 have a blade “life” of 50 days or more and a “cutting speed” of ◎ or It was good with ○ mark.
このうち、実施例１〜１０の切断刃は、刃の本体角度Ｂを一定（３５度）とし、刃先から上方１ｍｍの厚みＡを変化させた場合であるが、刃の厚みが増す（この場合は、同時に刃先の平坦部幅Ｃが広くなっている）に伴い刃の「寿命」が延び、その間、「切断速度」は良好に維持されていることがわかる。特に、刃先から上方１ｍｍの厚みＡが本発明で規定する望ましい条件（４．０〜１１．０ｍｍ）を満たす実施例４〜８の切断刃は、刃の「寿命」１００日以上、「切断速度」は◎印で極めて良好であった。 Among these, the cutting blades of Examples 1 to 10 are cases where the blade body angle B is constant (35 degrees) and the thickness A of 1 mm above the blade edge is changed, but the blade thickness increases (in this case) At the same time, it is understood that the “life” of the blade is extended as the flat portion width C of the blade edge is widened , and the “cutting speed” is maintained well during that time. In particular, the cutting blades of Examples 4 to 8 satisfying the desirable condition ( 4.0 to 11.0 mm) defined by the present invention with a thickness A of 1 mm above the blade edge is not less than 100 days. "Speed" was markedly marked by ◎.
刃の厚みＡが本発明で規定する下限（２．５ｍｍ）より厚いが、前記望ましい条件（４．０〜１１．０ｍｍ）からは外れる（つまり、刃の厚みが若干薄い）実施例１〜３の切断刃では、「切断速度」は極めて良好であったが、刃の「寿命」が１００日未満であった。また、刃先から上方１ｍｍの厚みＡが本発明で規定する上限（１２．０ｍｍ）より狭いが、前記望ましい条件よりは厚い実施例９、１０の切断刃では、刃の「寿命」はさらに延びたが、「切断速度」が◎印から○印へと幾分評価が下がった。 Thickness than the lower limit (2.5 mm) of thickness A of the blade is defined in the present invention Iga, it deviates from the desired condition (4.0 ~ 11.0 mm) (i.e., a thin blade thickness slightly) Example With the cutting blades 1 to 3, the “cutting speed” was very good, but the “life” of the blade was less than 100 days. Although the thickness A of the upper 1mm from the cutting edge is narrower than the upper limit (12.0 mm) specified in the present invention, the cutting blade of the have thickness than desired conditions Examples 9 and 10, "lifetime" of the blade is further Although extended, the “cutting speed” was somewhat lowered from the mark ◎ to the mark ○.
なお、刃先から上方１ｍｍの厚みＡが、本発明で規定する下限（２．５ｍｍ）に満たない比較例１の切断刃では刃の「寿命」が５０日未満で短かく、本発明で規定する上限（１２．０ｍｍ）を超える比較例２の切断刃は、「切断速度」が低下して使用に耐えないものであった。 In addition, in the cutting blade of Comparative Example 1 in which the thickness A 1 mm above the blade edge is less than the lower limit ( 2.5 mm) defined in the present invention, the “life” of the blade is short in less than 50 days and is defined in the present invention. The cutting blade of Comparative Example 2 exceeding the upper limit ( 12.0 mm) to be used was one that could not withstand use because the “cutting speed” decreased.
実施例１１〜１５の切断刃は、刃先の平坦部幅Ｃを一定とし、刃先から上方１ｍｍの厚みＡと刃の本体角度Ｂを変化させた場合であるが、本体角度Ｂが大きくなるに伴い刃の「寿命」が延び、「切断速度」は良好に維持された。特に、刃の本体角度Ｂが３５〜５０度の範囲内にある実施例１２〜１４の切断刃は、刃の「寿命」１００日以上、「切断速度」は◎印で極めて良好であった。 In the cutting blades of Examples 11 to 15, the flat part width C of the blade edge is made constant, and the thickness A 1 mm above the blade edge and the main body angle B of the blade are changed, but as the main body angle B increases. The “life” of the blade was extended and the “cutting speed” was maintained well. In particular, the cutting blades of Examples 12 to 14 in which the blade body angle B was in the range of 35 to 50 degrees were extremely good with a “life” of the blade of 100 days or more and a “cutting speed” of ◎. .
刃の本体角度Ｂが３０度より大きいが、３５〜５０度からは外れる（つまり、刃先部の厚みが若干薄い）実施例１１の切断刃では、「切断速度」は極めて良好であったが、刃の「寿命」が１００日未満であった。また、刃の本体角度Ｂが５５度以下ではあるが、３５〜５０度からは外れる実施例１５の切断刃では、刃の「寿命」の延びはみられず、「切断速度」の評価が若干下がった。 Although Ri larger by 3 0 degree body angle B of the blade, 3 5-50 times or colleagues outside (that is, the thickness of the cutting edge portion is slightly thinner) in the cutting blade of Example 11, "cutting rate" is very good The blade “life” was less than 100 days. Also, albeit in the body angle B is 5 5 degrees or of a blade 3 at the cutting edge 5 to 50 degrees or we deviate Example 15, extending the "life" of the blade is not observed, "cutting speed" The evaluation of slightly decreased.
なお、刃の本体角度Ｂが、３０度に満たない比較例３の切断刃では刃の「寿命」が５０日未満で短かく、５５度を超える比較例４の切断刃は、「切断速度」が低下して使用に耐えなかった。 Incidentally, the body angle B of the blade is, 3 0 ° "lifetime" in the cutting blade of Comparative Example 3 less than blade to the short in less than 50 days, the cutting blade of Comparative Example 4 more than 5 5 degrees, "cut "Speed" decreased and could not be used.
実施例１６〜１９の切断刃は、刃の本体角度Ｂを３５度、刃先から上方１ｍｍの厚みＡを３．５〜４．５ｍｍとし、刃先を平坦ではなく、Ｒやテーパ（図１(ｄ)参照）を付け、または刃の両面方向に緩く傾斜させた（図１(ｃ)参照）切断刃（以下、「先端傾斜両刃」という）であるが、刃先の形状の違いによる影響は認められず、刃の「寿命」は５０日以上または１００日以上、「切断速度」は◎印で極めて良好であった。 In the cutting blades of Examples 16 to 19, the blade body angle B is 35 degrees, the thickness A 1 mm above the blade edge is 3.5 to 4.5 mm, the blade edge is not flat, and R or taper (FIG. 1 (d )), Or a slanted blade (referred to as “cylinder tip slanted blade” hereinafter) that is gently slanted in the direction of both sides of the blade (referred to as “tip slanted double-edged blade” hereinafter), but the effect due to the difference in the shape of the blade edge is recognized The “life” of the blade was 50 days or more or 100 days or more, and the “cutting speed” was very good with ◎.
実施例１６の切断刃は、前記実施例１７の切断刃に比べるとＲが小さく、そのため、刃先から上方１ｍｍの厚みＡが本発明で規定する下限（２．５ｍｍ）以上ではあるが、望ましい条件（４．０〜１１．０ｍｍ）からは外れており（つまり、刃の厚みが若干薄く）、「切断速度」は極めて良好であったが、刃の「寿命」が１００日未満であった。なお、Ｒがさらに小さい比較例５の切断刃は、刃先から上方１ｍｍの厚みＡが本発明で規定する下限（２．５ｍｍ）より薄く、刃の「寿命」が５０日未満で短かかった。また、従来例１の切断刃はＲが比較例５の場合よりさらに小さく、刃の厚みが薄いため、刃の「寿命」はさらに短かかった。 The cutting blade of Example 16 has a smaller R than the cutting blade of Example 17, so that the thickness A of 1 mm above the blade edge is not less than the lower limit (2.5 mm) defined in the present invention, but desirable conditions. (4.0 to 11.0 mm) (ie, the blade thickness is slightly thin) and the “cutting speed” was very good, but the “life” of the blade was less than 100 days. In the cutting blade of Comparative Example 5 having a smaller R, the thickness A 1 mm above the blade edge was thinner than the lower limit (2.5 mm) defined in the present invention, and the “life” of the blade was shorter than 50 days. Further, the cutting blade of Conventional Example 1 had a smaller R than that of Comparative Example 5 and the blade thickness was thinner, so the “life” of the blade was even shorter.
実施例２０〜２２の切断刃は、実施例１９に示した先端傾斜両刃型の切断刃について、刃の本体角度Ｂを一定（３５度）とし、刃先から上方１ｍｍの厚みＡを変化させた場合であるが、刃先から上方１ｍｍの厚みＡが増すに伴い刃の「寿命」が延び、「切断速度」は良好に維持された。特に、前記の厚みＡが本発明で規定する望ましい条件（４．０〜１１．０ｍｍ）を満たす実施例２１の切断刃は、刃の「寿命」１００日以上、「切断速度」は◎印で極めて良好であった。 In the cutting blades of Examples 20 to 22, when the blade body angle B is constant (35 degrees) and the thickness A of 1 mm above the cutting edge is changed with respect to the tip-tilted double-edged cutting blade shown in Example 19 However, as the thickness A of 1 mm upward from the blade edge increased, the “life” of the blade was extended, and the “cutting speed” was maintained well. In particular, the cutting blade of Example 21 that satisfies the desirable condition (4.0 to 11.0 mm) defined by the present invention for the thickness A is “blade life” of 100 days or more, and the “cutting speed” is marked with ◎. It was very good.
刃先から上方１ｍｍの厚みＡが本発明で規定する下限（２．５ｍｍ）より大きいが、前記望ましい条件からは外れる実施例２０の切断刃は、「切断速度」は極めて良好であったが、刃の「寿命」が１００日未満であった。また、前記の厚みＡが本発明で規定する上限（１２．０ｍｍ）以下ではあるが、望ましい条件からは外れる実施例２２の切断刃は、刃の「寿命」はさらに延びたが、「切断速度」の評価が幾分低下した。 Although the thickness A of 1 mm above the blade edge is larger than the lower limit (2.5 mm) defined in the present invention, the cutting blade of Example 20 that deviates from the desirable conditions had a very good “cutting speed”. The “lifetime” was less than 100 days. Further, although the thickness A is not more than the upper limit (12.0 mm) defined in the present invention, the cutting blade of Example 22 that deviates from the desirable condition further increased the “life” of the blade, "'S rating dropped somewhat.
なお、刃先から上方１ｍｍの厚みＡが本発明で規定する下限（２．５ｍｍ）に満たない比較例６の切断刃は刃の「寿命が」５０日未満で短く、本発明で規定する上限（１２．０ｍｍ）を超える比較例７の切断刃は「切断速度」が低下して使用に耐えなかった。 In addition, the cutting blade of Comparative Example 6 in which the thickness A 1 mm above the blade edge is less than the lower limit (2.5 mm) defined in the present invention is shorter than the “life” of the blade in less than 50 days, and the upper limit defined in the present invention ( The cutting blade of Comparative Example 7 exceeding 12.0 mm) could not be used because the “cutting speed” decreased.
以上の結果から、所定の本体角度Ｂを有する切断刃において、刃先から上方１ｍｍの厚みＡを適正範囲に規定することが、刃の「寿命」と「切断速度」のバランスをとり、両者をともに良好にする上で重要であることがわかる。
From the above results, in the cutting edge having a predetermined body angle B, and to define the blade edge thickness A of the upper 1mm in a proper range, a balance of the "life" and "cutting rate" of the blade, both It turns out that both are important in making good.
本発明のスポンジ状チタン塊用切断刃は、現在、製造の主流となっている大型のスポンジ状チタン塊の切断に特に有効である。この切断刃を使用すれば、刃先の破損が生じにくく、切断速度を低下させずに刃の寿命を大幅に延長させることができ、切断刃の交換頻度の減少によるコストの低減に加えて、生産能率の向上効果も大きく、金属チタンの製造コスト削減に大きく寄与する。 The cutting blade for sponge-like titanium ingots according to the present invention is particularly effective for cutting large sponge-like titanium ingots that are currently in production. If this cutting blade is used, the cutting edge is less likely to be damaged, and the life of the blade can be greatly extended without reducing the cutting speed. The effect of improving the efficiency is also great, which greatly contributes to the reduction of titanium metal manufacturing costs.
１：切断刃
２：刃先
３：刃先部
４：刃本体部
1: Cutting blade 2: Blade edge 3: Blade edge part 4: Blade body part
Claims (2)
２．５ｍｍ≦刃先から上方１ｍｍの厚み≦１２．０ｍｍ ・・・（1） A sponge-like titanium lump cutting blade which is used as a cutting blade for a push-cut press and satisfies the following formula ( 1 ) in a sponge-like titanium lump cutting blade having a blade body angle of 30 to 55 degrees.
2.5 mm ≦ thickness 1 mm above the cutting edge ≦ 12.0 mm ( 1 )
４．０ｍｍ≦刃先から上方１ｍｍの厚み≦１１．０ｍｍ ・・・（2） A sponge-like titanium lump cutting blade that is used as a cutting blade for a push-cut press and satisfies the following formula ( 2 ) in a sponge-like titanium lump cutting blade having a blade body angle of 35 to 50 degrees.
4.0 mm ≦ thickness 1 mm above the blade edge ≦ 11.0 mm ( 2 )
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003334928A JP4183080B2 (en) | 2003-09-26 | 2003-09-26 | Cutting blade for sponge-like titanium block |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003334928A JP4183080B2 (en) | 2003-09-26 | 2003-09-26 | Cutting blade for sponge-like titanium block |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007107682A Division JP2007185772A (en) | 2007-04-17 | 2007-04-17 | Cutting blade for sponge-like titanium cake |
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| Publication Number | Publication Date |
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| JP2005096046A JP2005096046A (en) | 2005-04-14 |
| JP4183080B2 true JP4183080B2 (en) | 2008-11-19 |
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| JP2003334928A Expired - Lifetime JP4183080B2 (en) | 2003-09-26 | 2003-09-26 | Cutting blade for sponge-like titanium block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021256282A1 (en) * | 2020-06-19 | 2021-12-23 | 株式会社アライドマテリアル | Cemented carbide cutting blade |
| JPWO2021256279A1 (en) * | 2020-06-19 | 2021-12-23 |
-
2003
- 2003-09-26 JP JP2003334928A patent/JP4183080B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021256282A1 (en) * | 2020-06-19 | 2021-12-23 | 株式会社アライドマテリアル | Cemented carbide cutting blade |
| JPWO2021256282A1 (en) * | 2020-06-19 | 2021-12-23 | ||
| JPWO2021256279A1 (en) * | 2020-06-19 | 2021-12-23 | ||
| WO2021256279A1 (en) * | 2020-06-19 | 2021-12-23 | 株式会社アライドマテリアル | Cemented carbide cutting blade |
| JP7142801B2 (en) | 2020-06-19 | 2022-09-27 | 株式会社アライドマテリアル | Cemented carbide cutting blade |
| JP7142802B2 (en) | 2020-06-19 | 2022-09-27 | 株式会社アライドマテリアル | Cemented carbide cutting blade |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005096046A (en) | 2005-04-14 |
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