JP5223420B2 - Method of peeling Ti alloy wire - Google Patents
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Description
本発明は、Ｔｉ合金を熱間線材圧延によって所定の線径にされたＴｉ合金線材の表層を覆う酸化物の黒皮を、効率良く確実に除去できるＴｉ合金線材の皮剥き方法に関する。 The present invention relates to a method for stripping a Ti alloy wire that can efficiently and reliably remove the black oxide skin covering the surface layer of a Ti alloy wire whose Ti alloy is made into a predetermined wire diameter by hot wire rolling.
Ｔｉ合金の素材を線材などに熱間加工する際に、表面の酸化硬化層の生成を抑制し、生産効率の高い加熱を行うため、Ｔｉ合金圧延素材を、表面の酸化硬化層の厚さが増大しない温度以下までは、燃焼雰囲気加熱炉で一次加熱し、引き続く高温域では、誘導加熱炉において加熱温度に応じた所定時間の加熱を行う、チタン合金圧延素材の加熱方法が提案されている（例えば、特許文献１参照）。
上記加熱方法によれば、熱間加工材における酸化硬化層を低減でき、且つ生産効率の高い加熱を施すことが可能となる。
When hot-working a Ti alloy material into a wire or the like, the thickness of the surface oxide hardened layer is reduced in order to suppress the formation of the surface oxide hardened layer and perform heating with high production efficiency. Until the temperature does not increase, a heating method of a titanium alloy rolled material is proposed in which primary heating is performed in a combustion atmosphere heating furnace and heating is performed for a predetermined time according to the heating temperature in an induction heating furnace in the subsequent high temperature range ( For example, see Patent Document 1).
According to the above heating method, it is possible to reduce the oxidation hardened layer in the hot-worked material and to perform heating with high production efficiency.
ところで、Ｔｉ合金線材は、熱間線材圧延などの前記熱間加工において、その表面に酸化物からなり黒皮と称される硬化層が生成される。係る黒皮を除去する場合、当該Ｔｉ合金線材の折損を防ぐため、予め、温間矯正し且つ所定の長さに切断した比較的短尺な複数本のＴｉ合金線材を、冷間において回転切削工具にそれぞれ強制的に通す方法によって行われている。
しかしながら、コイル状に巻き付けられた長尺なＴｉ合金線材を直線状に巻き返し、所定の長さに切断した比較的短尺なＴｉ合金線材を、冷間における回転切削工具に通す黒皮剥きを行う方法では、切削速度が低いため、生産効率を低下させる。しかも、製造工程間に仕掛かりのＴｉ合金線材が増加すること起因して、コスト高を招く、という問題もあった。
By the way, in the hot working such as hot wire rolling, the Ti alloy wire is formed with an oxide on its surface to form a hardened layer called a black skin. When removing such black skin, in order to prevent breakage of the Ti alloy wire, a plurality of relatively short Ti alloy wires that have been warm-corrected and cut into a predetermined length in advance are rotated in a cold manner. It is done by the method of passing through each forcibly.
However, a method for stripping black skin by passing a long Ti alloy wire wound in a coil shape in a straight line and passing a relatively short Ti alloy wire cut to a predetermined length through a rotary cutting tool in the cold. Then, since the cutting speed is low, the production efficiency is lowered. In addition, there is a problem that the cost increases due to an increase in the Ti alloy wire in progress between the manufacturing processes.
本発明は、前記背景技術において説明した問題点を解決し、コイル状に巻き付けられた長尺なＴｉ合金線材に対する黒皮の除去を、連続して確実に且つ効率良く行なえるＴｉ合金線材の皮剥き方法を提供する、ことを課題とする。 The present invention solves the problems described in the above background art, and removes the black skin from a long Ti alloy wire wound in a coil shape continuously and efficiently. It is an object to provide a peeling method.
本発明は、前記課題を解決するため、コイル形態から直線状に巻き返したＴｉ合金線材を温間温度領域に加熱して、黒皮を除去する皮剥き工程を連続して施す、ことに着想して成されたものである。
即ち、本発明によるＴｉ合金線材の皮剥き方法（請求項１）は、熱間線材圧延によって所定の線径に縮径されたＴｉ合金線材の表層における酸化物からなる黒皮を、温間温度領域でリング状の切削刃を有する皮剥きダイスに上記線材を通して切除する皮剥き工程を含み、上記皮剥き工程において、上記Ｔｉ合金線材の先端面に、係るＴｉ合金よりも軟質のＴｉ合金からなり、且つ上記Ｔｉ合金線材よりも細径の端部線材を、アモルファスシートを介して溶着した後、係る端部線材を含む上記Ｔｉ合金線材を、一対の溝付きロール間に挟み込んでから、上記皮剥きダイスに通す、ことを特徴とする。
In order to solve the above-mentioned problems, the present invention has been conceived in that a Ti alloy wire wound in a straight line from a coil form is heated to a warm temperature region to continuously perform a peeling process for removing black skin. It was made.
That is, the method for peeling a Ti alloy wire according to the present invention (Claim 1) is a method for removing a black skin made of an oxide in a surface layer of a Ti alloy wire that has been reduced in diameter to a predetermined wire diameter by hot wire rolling. look including a peeling step of ablating through the wire to the peeling die having a ring-like cutting edge in the region, in the peeling process, the front end surface of the Ti alloy wire, a Ti alloy softer than Ti alloy according And after welding an end wire having a diameter smaller than that of the Ti alloy wire through an amorphous sheet, the Ti alloy wire containing the end wire is sandwiched between a pair of grooved rolls, and then It is characterized by being passed through a peeling die .
これによれば、熱間線材圧延によって１２ｍｍ未満の線径に縮径されたＴｉ合金線材を、その温間温度領域に加熱した状態で、リング状の切削刃を有する皮剥きダイスに通している。このため、前記熱間線材圧延において、当該Ｔｉ合金線材の表層に生成された酸化物からなる黒皮を、折損を生じることなく、確実に切削して除去することが可能となる。
しかも、前記皮剥き工程では、前記Ｔｉ合金線材の先端面に、係るＴｉ合金よりも軟質のＴｉ合金からなり、且つ上記Ｔｉ合金線材よりも細径の端部線材を、アモルファスシートを介して溶着した後、係る端部線材を含む上記Ｔｉ合金線材を、一対の溝付きロール間に挟み込んでから、前記皮剥きダイスに通している。その結果、折損し易いＴｉ合金からなる長尺な線材であっても、その先端面に上記アモルファスシートを介して溶着された端部線材を、上記一対の溝付きロール間に挟み込んでから、前記皮剥きダイスに通すため、折損を生じることなく、当該Ｔｉ合金線材の黒皮を連続して確実に切除することが可能となる。
According to this, a Ti alloy wire reduced to a wire diameter of less than 12 mm by hot wire rolling is passed through a peeling die having a ring-shaped cutting blade while being heated to its warm temperature region. . For this reason, in the hot wire rolling, it becomes possible to surely cut and remove the black skin made of oxide generated on the surface layer of the Ti alloy wire without causing breakage.
Moreover, in the skinning step, an end wire made of a Ti alloy softer than the Ti alloy and having a diameter smaller than that of the Ti alloy wire is welded to the tip surface of the Ti alloy wire via an amorphous sheet. After that, the Ti alloy wire including the end wire is sandwiched between a pair of grooved rolls and then passed through the peeling die . As a result, even if it is a long wire made of a Ti alloy that is easy to break, the end wire welded to the front end surface via the amorphous sheet is sandwiched between the pair of grooved rolls, Since it passes through the peeling die, the black skin of the Ti alloy wire can be continuously and reliably cut without causing breakage .
尚、前記Ｔｉ合金線材は、例えば、Ｔｉ−６質量％Ａｌ−４質量％Ｓｎ−３．４質量％ＺｒのようなＴｉ合金からなる。
また、前記Ｔｉ合金線材は、複数対の溝付きロール間に強制的に通す熱間線材圧延によって、例えば、約１３ｍｍの線径から約７ｍｍに縮径される。
更に、前記温間温度領域は、約４００〜７００℃である。
加えて、前記皮剥きダイスのすくい角は、２０度以下の範囲が推奨される。
The Ti alloy wire is made of a Ti alloy such as Ti-6 mass% Al-4 mass% Sn-3.4 mass% Zr.
The Ti alloy wire is reduced in diameter from, for example, a wire diameter of about 13 mm to about 7 mm by hot wire rolling forcibly passing between a plurality of pairs of grooved rolls.
Further, the warm temperature region is about 400-700 ° C.
In addition, the rake angle of the peeling die is recommended to be in the range of 20 degrees or less.
また、本発明には、前記皮剥き工程は、熱間線材圧延されてからコイル状に巻き付けられたＴｉ合金線材を、巻き返して直線状とし、且つ温間温度領域に加熱した後、前記皮剥きダイスを通過させる工程である、Ｔｉ合金線材の皮剥き方法（請求項２）も含まれる。
これによれば、コイル状に巻き付けられたＴｉ合金線材を、巻き返して直線状とし、係る直線状のＴｉ合金線材を、温間温度領域に加熱した状態で、前記皮剥きダイスに通している。その結果、長尺なＴｉ合金線材の黒皮を、折損を生じることなく、連続して確実に除去できるため、従来のような短尺に切断した後で、複数の線材を個別に皮剥きする方法に比べ、約数１０倍の切削速度で皮剥きを施すことが可能となる。
尚、前記温間温度領域への加熱は、皮剥きダイスの前方ないし直前に配置した誘導加熱装置などに、前記Ｔｉ合金線材を通過させることで行われる。
Further, in the present invention, the stripping step includes rolling the Ti alloy wire wound in a coil shape after being rolled into a hot wire into a linear shape and heating it to a warm temperature region, and then stripping the skin. Also included is a method for peeling a Ti alloy wire, which is a step of passing a die.
According to this, the Ti alloy wire wound in a coil shape is rewound into a linear shape, and the linear Ti alloy wire is passed through the skinning die in a state heated to a warm temperature region. As a result, since the black skin of the long Ti alloy wire can be removed continuously and reliably without causing breakage, a method of peeling a plurality of wires individually after cutting into a short length as in the prior art Compared to the above, it is possible to perform skinning at a cutting speed of about several tens of times.
The heating to the warm temperature region is performed by passing the Ti alloy wire through an induction heating device or the like disposed in front of or just before the skinning die.
尚、前記アモルファスシートには、例えば、Ｎｉ−Ｃｒ系非晶質金属などが使用される。
また、前記端部線材は、いわゆる口付け材であり、例えば、Ｔｉ−６質量％Ａｌ−４質量％ＶのＴｉ合金からなり、一端が先細形状に予め成形されている。
更に、前記端部線材の溶着は、例えば、電気抵抗溶接の一種であるバットシーム溶接の変形形態たるバット溶接によって行われる。
For the amorphous sheet, for example, a Ni—Cr amorphous metal is used.
Moreover, the said end part wire is what is called a sticking material, for example, consists of Ti alloy of Ti-6 mass% Al-4 mass% V, and the one end is shape | molded in the taper shape beforehand.
Further, the welding of the end wire is performed by, for example, butt welding which is a modified form of butt seam welding which is a kind of electric resistance welding.
以下において、本発明を実施するための最良の形態について説明する。
図１は、本発明を含むＴｉ合金線材の製造方法を示す流れ図、および各工程の概略図である。尚、以下において、単に％と示す場合は、質量％を示している。
予め、例えば、Ｔｉ−６％Ａｌ−４％Ｓｎ−３．４％ＺｒのようなＴｉ合金を溶製し、得られたＴｉ合金の鋳片を、図１に示すように、断面ほぼ半円形の溝ｍを有し且つ前後に連続する複数対の圧延ロールｒ１，ｒ２間に通して、徐々に縮径してゆく熱間線材圧延（工程）Ｓ１を施す。その結果、例えば、線径が約１３ｍｍから約７．５ｍｍに縮径されたＴｉ合金線材Ｗが得られる。
尚、上記圧延ロールｒ１，ｒ２のほかに、伸線ダイスｓＤのテーパ孔ｈに通して、上記線径のＴｉ合金線材Ｗを製作しても良い。また、熱間線材圧延Ｓ１の中間で、表面に生成された酸化物を除去するための酸洗処理を行っても良い。
In the following, the best mode for carrying out the present invention will be described.
FIG. 1 is a flow chart showing a Ti alloy wire manufacturing method including the present invention, and a schematic diagram of each process. In the following, when simply indicated as%, it indicates mass%.
For example, a Ti alloy such as Ti-6% Al-4% Sn-3.4% Zr is melted in advance, and the resulting Ti alloy slab is substantially semicircular in cross section as shown in FIG. The hot wire rolling (step) S1 is carried out through a plurality of pairs of rolling rolls r1 and r2 that are continuous in the front-rear direction. As a result, for example, a Ti alloy wire W whose diameter is reduced from about 13 mm to about 7.5 mm is obtained.
In addition to the rolling rolls r1 and r2, the Ti alloy wire W having the above-described wire diameter may be manufactured through the tapered hole h of the wire drawing die sD. Moreover, you may perform the pickling process for removing the oxide produced | generated on the surface in the middle of hot wire rod rolling S1.
次に、図１に示すように、前記Ｔｉ合金線材Ｗの表層に付着した酸化物からなる黒皮を除去するため、予め、約４００〜７００℃（例えば、５００℃）の温間温度領域に加熱した後、リング状の切削刃ｎを有する皮剥きダイスｋＤの貫通孔に通す皮剥き工程Ｓ２を行う。
係る皮剥き工程Ｓ２は、図２に示すように、前記熱間線材圧延Ｓ１後にリールＬ１にコイルＣ１状にして巻き付けられた長尺なＴｉ合金線材Ｗを巻き返して直線状とし、誘導加熱装置ＩＨの内側を貫通させて、前記温間温度領域に加熱した後、対向する一対の溝付きロールＲ１，Ｒ２間に挟み込み、その下流側に隣接する皮剥きダイスｋＤに送給して行われる。
Next, as shown in FIG. 1, in order to remove the black skin made of oxide adhering to the surface layer of the Ti alloy wire W, a warm temperature range of about 400 to 700 ° C. (for example, 500 ° C.) is used in advance. After the heating, a skin peeling step S2 is performed through which the through hole of the skin peeling die kD having the ring-shaped cutting blade n is passed.
As shown in FIG. 2, the stripping step S2 is performed by rewinding a long Ti alloy wire W wound around the reel L1 in the form of a coil C1 after the hot wire rolling S1 to form a straight line, and the induction heating device IH After being heated to the warm temperature region, it is sandwiched between a pair of opposed grooved rolls R1, R2 and fed to the skin peeling die kD adjacent to the downstream side.
これに先立ち、Ｔｉ合金線材Ｗが前記溝付きロールＲ１，Ｒ２間に挟み込んだ際に、折損を生じる事態を防ぐため、図２の左下側に示すように、Ｔｉ合金線材Ｗの先端面に、例えば、Ｎｉ−Ｃｒ系からなるアモルファスシートＳを介して、端部線材ｉｗをバット溶接（電気抵抗溶接の一種）によって接合する。
係る端部線材ｉｗは、前記Ｔｉ合金線材Ｗよりも軟質のＴｉ合金（例えば、Ｔｉ−６％Ａｌ−４％Ｖ）からなり、且つ上記Ｔｉ合金線材Ｗよりも少なくとも先端側が細径（先細形状）となるように予め成形されている。
Prior to this, when the Ti alloy wire W is sandwiched between the grooved rolls R1, R2, as shown on the lower left side of FIG. For example, the end wire rod iw is joined by butt welding (a kind of electric resistance welding) through an amorphous sheet S made of Ni—Cr.
The end wire iw is made of a Ti alloy softer than the Ti alloy wire W (for example, Ti-6% Al-4% V), and at least the tip side of the Ti alloy wire W has a smaller diameter (tapered shape). ).
具体的な溶接方法は、先ず、前記Ｔｉ合金線材Ｗと端部線材ｉｗとを、軸方向に沿って連続するようにして図示しない溶接機の電極ごとに個別に拘束し、対向する前者の先端面と後者の後端面との隙間に、例えば、Ｎｉ−１９％Ｃｒ−７．３％Ｓｉ−１．５％Ｂ（Ｎｉ−Ｃｒ系非晶質金属）のアモルファスシートＳ（米国Ｍｅｔｌａｓ社製：ＭＢＦ−５０）を挟み込む。次に、上記Ｔｉ合金線材Ｗと端部線材ｉｗとを、軸方向に沿って互いに接近するように押し付け合った状態にして、両線材Ｗ，ｉｗ間およびアモルファスシートＳに所定の溶接電流を給電する。
すると、先にアモルファスシートＳのみが溶融し、続いて隣接するＴｉ合金線材Ｗおよび端部線材ｉｗそれぞれの一部が溶融して溶融層が拡大し、係る溶融層がＴｉ合金線材Ｗと端部線材ｉｗとの合金組織に向かって拡散しながら冷却された後、冷え固まって金属組織上から接合面が消失する。その結果、Ｔｉ合金線材Ｗの先端面に、端部線材ｉｗが溶着される。
Specifically, first, the Ti alloy wire W and the end wire iw are individually restrained for each electrode of a welding machine (not shown) so as to be continuous along the axial direction, and the front ends of the former facing each other. In the gap between the surface and the rear end surface of the latter, for example, an amorphous sheet S of Ni-19% Cr-7.3% Si-1.5% B (Ni-Cr-based amorphous metal) (manufactured by Metlas, USA) Insert MBF-50). Next, the Ti alloy wire W and the end wire iw are pressed against each other along the axial direction, and a predetermined welding current is supplied between the wires W and iw and the amorphous sheet S. To do.
Then, only the amorphous sheet S is melted first, and subsequently, a part of each of the adjacent Ti alloy wire W and end wire iw is melted to expand the molten layer. After being cooled while diffusing toward the alloy structure with the wire iw, it is cooled and solidified, and the joint surface disappears from the metal structure. As a result, the distal end surface of the Ti alloy wire W, the end wires iw are welded.
次いで、端部線材ｉｗが先端面に溶着されたＴｉ合金線材Ｗを、図２に示すように、係る端部線材ｉｗの細径側から一対の溝付きロールＲ１，Ｒ２間に挟み込んでから、その下流側に隣接する皮剥きダイスｋＤの貫通孔ｘに挿入する。この際、予め先端面に用着した比較的軟質の端部線材ｉｗによって、溝付きロールＲ１，Ｒ２間に誘導されるため、Ｔｉ合金線材Ｗが折れる事態を回避できる。しかも、ダイスｋＤの貫通孔ｘの内側へ容易に挿入することも可能となる。
尚、皮剥きダイスｋＤにおける貫通孔ｘの内径は、Ｔｉ合金線材Ｗの外径よりも小さく、その差が皮剥きにより切除すべき酸化物からなる黒皮の厚みに相当する。また、皮剥きダイスｋＤのすくい角θは、約２０度以下の範囲であり、貫通孔ｘ内の逃げ角は、約５度である。
Next, as shown in FIG. 2, the Ti alloy wire W with the end wire iw welded to the tip surface is sandwiched between the pair of grooved rolls R1, R2 from the small diameter side of the end wire iw. It inserts into the through-hole x of the peeling die kD adjacent to the downstream side. At this time, since the grooved rolls R1 and R2 are guided by the relatively soft end wire iw previously attached to the tip surface, it is possible to avoid the situation where the Ti alloy wire W is broken. Moreover, it can be easily inserted into the through hole x of the die kD.
The inner diameter of the through hole x in the skinning die kD is smaller than the outer diameter of the Ti alloy wire W, and the difference corresponds to the thickness of the black skin made of oxide to be removed by skinning. Further, the rake angle θ of the peeling die kD is in a range of about 20 degrees or less, and the clearance angle in the through hole x is about 5 degrees.
図２に示すように、一対の溝付きロールＲ１，Ｒ２により、軸方向に沿って端部線材ｉｗの細径側から皮剥きダイスｋＤの貫通孔ｘに挿入されたＴｉ合金線材Ｗは、貫通孔ｘの上流側に位置するリング状の切削刃ｎによって、その黒皮が全周面でほぼ均一に切除され、ほぼ放射方向に伸びる複数の切削屑（ダライ）ｆとなって除去される。しかも、Ｔｉ合金線材Ｗは、前記誘導加熱装置ＩＨによって約４００〜７００℃の温間温度領域にあるため、表面全体に付着した黒皮を高速度で且つスムースに切除され、黒皮のないＴｉ合金線材ｗとなる。
係る黒皮の皮剥き工程Ｓ２は、軸方向に沿って配置した複数個の皮剥きダイスｋＤに連続して通し、各ダイスｋＤごとの切削代を、約０．０５ｍｍ以下にして行うようにしても良い。
そして、黒皮が切除されたＴｉ合金線材ｗは、図２に示すように、リールＬ２の周面に巻き付けられ、ほぼ円柱形のコイルＣ２状とされる。
As shown in FIG. 2, the Ti alloy wire W inserted into the through-hole x of the skinning die kD from the small diameter side of the end wire iw along the axial direction passes through the pair of grooved rolls R1 and R2. By the ring-shaped cutting blade n located on the upstream side of the hole x, the black skin is cut off almost uniformly on the entire peripheral surface, and is removed as a plurality of cutting chips (Dalai) f extending in the radial direction. Moreover, since the Ti alloy wire W is in the warm temperature range of about 400 to 700 ° C. by the induction heating device IH, the black skin adhering to the entire surface is smoothly cut off at a high speed, and there is no black skin Ti. It becomes the alloy wire w.
The black skin peeling step S2 is continuously performed through a plurality of peeling dies kD arranged along the axial direction, and the cutting allowance for each die kD is set to about 0.05 mm or less. Also good.
Then, as shown in FIG. 2, the Ti alloy wire w from which the black skin has been cut is wound around the peripheral surface of the reel L2 to form a substantially cylindrical coil C2.
前記皮剥き工程Ｓ２で、黒皮を皮剥きされ且つコイルＣ２にされたＴｉ合金線材ｗは、図１に示すように、矯正・切断工程Ｓ３に送られ、前記コイルＣ２から巻き返され、直線状とされた冷間温度域のＴｉ合金線材ｗを、平面視で千鳥状のパターンに配置された複数ずつの溝付きロールｒ３，ｒ４間に通し、コイルＣ２などによる巻き癖などを除去して矯正する。引き続いて、高速回転するエメリーソーなどの回転鋸ｓによって、一定長さのＴｉ合金線材ｗごとに切断される。
そして、図１に示すように、一定の長さに切断されたＴｉ合金線材ｗは、仕上げ研磨工程Ｓ４に送られ、高速回転する円筒形のハウジングＨの内周面に対称に取り付けた複数の砥石ｇにより、周面における微小な凹凸を研磨される。
その結果、黒皮がなく、所要寸法で且つ表面粗さが均一なＴｉ合金線材ｗに仕上げられる。
In the skinning step S2, the Ti alloy wire w stripped of the black skin and made into the coil C2 is sent to the straightening / cutting step S3 as shown in FIG. The Ti alloy wire w in the cold temperature region formed in the shape is passed between a plurality of grooved rolls r3 and r4 arranged in a zigzag pattern in plan view, and the curl caused by the coil C2 or the like is removed. to correct. Subsequently, the Ti alloy wire w having a certain length is cut by a rotary saw s such as an emery saw rotating at high speed.
Then, as shown in FIG. 1, the Ti alloy wire w cut to a certain length is sent to the finish polishing step S4, and a plurality of symmetrically attached to the inner peripheral surface of the cylindrical housing H that rotates at high speed. Fine irregularities on the peripheral surface are polished by the grindstone g.
As a result, a Ti alloy wire w having a black surface, a required size and a uniform surface roughness is finished.
以上のような形態による本発明のＴｉ合金線材の皮剥き方法を含むＴｉ合金線材の製造方法によれば、熱間線材圧延Ｓ１されたＴｉ合金線材Ｗに対し、直線状にし且つ温間温度領域で皮剥き工程Ｓ２を施すため、皮剥きダイスｋＤによる黒皮を切除するラインの切削速度が、先に切断した複数本のＴｉ合金線材Ｗに対して、冷間で個別に皮剥きを行う従来の方法に比べて、数１０倍程度速くすることができる。
しかも、比較的脆く折損し易いＴｉ合金線材の場合には、その先端面に前記アモルファスシートＳを介して、比較的軟質のＴｉ合金からなる前記端部線材ｉｗを溶着することにより、皮剥き工程Ｓ２における一対の溝付きロールＲ１，Ｒ２間を折れずに通過させ、且つ皮剥きダイスｋＤにスムーズに通して、表面の黒皮を確実に切除することもできる。
従って、本発明のＴｉ合金線材の皮剥き方法によれば、Ｔｉ合金線材の製造効率を著しく向上させることが可能となる。
According to the Ti alloy wire manufacturing method including the stripping method of the Ti alloy wire according to the present invention in the form as described above, the Ti alloy wire W subjected to hot wire rolling S1 is linearized and in a warm temperature region. In order to perform the skinning step S2, the cutting speed of the line for cutting off the black skin by the skinning die kD is a conventional method in which the plurality of Ti alloy wires W cut earlier are individually skinned cold. Compared with this method, it can be made several tens of times faster.
Moreover, in the case of a Ti alloy wire that is relatively brittle and easily broken, the end wire iw made of a relatively soft Ti alloy is welded to the tip surface of the Ti alloy wire via the amorphous sheet S, thereby peeling the skin. The pair of grooved rolls R1 and R2 in S2 can be passed through without breaking, and can be smoothly passed through the peeling die kD, so that the black skin on the surface can be surely cut off.
Therefore, according to the stripping method of the Ti alloy wire of the present invention, it becomes possible to remarkably improve the production efficiency of the Ti alloy wire.
ここで、本発明によるＴｉ合金線材の皮剥き方法の実施例を説明する。
Ｔｉ−６％Ａｌ−４％Ｓｎ−３．４％ＺｒのＴｉ合金からなり、予め、同じ熱間線材圧延Ｓ１を施され線径が７．４ｍｍで互いに同じ長さである２本のＴｉ合金線材Ｗをコイル形にして用意した。
一方は、実施例用のＴｉ合金線材Ｗであって、前記コイルＣ１から直線状に巻き返し、前記誘導加熱装置ＩＨの内側を貫通させ、５００℃（温間温度領域）に保った状態で、複数の皮剥きダイスｋＤに連続して通し（皮剥き工程Ｓ２）、線径が６．４ｍｍのＴｉ合金線材ｗとした。この際、各皮剥きダイスｋＤでの切削代は、０．０５ｍｍとした。
Here, the Example of the peeling method of the Ti alloy wire by this invention is described.
Two Ti alloys made of Ti-6% Al-4% Sn-3.4% Zr Ti alloy, previously subjected to the same hot wire rolling S1 and having a wire diameter of 7.4 mm and the same length. The wire W was prepared in a coil shape.
One is a Ti alloy wire W for an example, which is wound in a straight line from the coil C1, penetrates the inside of the induction heating device IH, and is kept at 500 ° C. (warm temperature region). A Ti alloy wire w having a wire diameter of 6.4 mm was continuously passed through the skinning die kD (skinning step S2). At this time, the cutting allowance with each peeling die kD was set to 0.05 mm.
他方は、比較例用のＴｉ合金線材Ｗであって、前記コイルＣ１から直線状に巻き返し、前記矯正・切断工程Ｓ３を先に行って、複数本の短い長さ（３ｍ）のＴｉ合金線材Ｗとした後、これらを複数の皮剥きダイスｋＤに冷間で個別に通し（皮剥き工程Ｓ２）、線径が６．４ｍｍのＴｉ合金線材ｗとした。
実施例の皮剥き方法による皮剥き工程Ｓ２では、黒皮の切削速度が平均４０ｍ／分であった。一方、比較施例の皮剥き方法による皮剥き工程Ｓ２では、黒皮の切削速度が平均１ｍ／分であった。
以上のような実施例の皮剥き方法によれば、比較例のような従来の皮剥き方法に比べて、著しく生産効率を高められることが確認できた。その結果、本発明の効果が裏付けられた。
The other is a Ti alloy wire W for a comparative example, which is rolled back linearly from the coil C1, and the straightening / cutting step S3 is performed first, so that a plurality of Ti alloy wires W having a short length (3 m) are obtained. Then, these were individually passed cold through a plurality of skinning dies kD (skinning step S2) to obtain a Ti alloy wire w having a wire diameter of 6.4 mm.
In the peeling step S2 by the peeling method of the example, the cutting speed of the black skin was 40 m / min on average. On the other hand, in the peeling process S2 by the peeling method of the comparative example, the cutting speed of the black skin was 1 m / min on average.
According to the skinning method of the above examples, it has been confirmed that the production efficiency can be remarkably improved as compared with the conventional skinning method as in the comparative example. As a result, the effect of the present invention was confirmed.
本発明は、以上にて説明した実施の形態や実施例に限定されるものではない。
例えば、本発明の対象となるＴｉ合金線材のＴｉ合金は、前記実施の形態や実施例で示した合金に限らず、冷間で皮剥きが施しにくいもの全てを含む。
また、Ｔｉ合金線材の温間温度領域への加熱は、前記誘導加熱装置ＩＨに限らず、雰囲気加熱方式の加熱炉によって行っても良い。
更に、前記アモルファスシートは、皮剥きすべき線材のＴｉ合金の合金組成に応じて、異なる組成のアモルファスシートを用いても良い。
The present invention is not limited to the embodiments and examples described above.
For example, the Ti alloys of the Ti alloy wire that is the subject of the present invention are not limited to the alloys shown in the above-described embodiments and examples, but include all those that are difficult to peel off in the cold.
The heating of the Ti alloy wire to the warm temperature region is not limited to the induction heating device IH, and may be performed by an atmosphere heating type heating furnace.
Furthermore, the amorphous sheet may be an amorphous sheet having a different composition depending on the alloy composition of the Ti alloy of the wire to be peeled.
Ｗ，ｗ………Ｔｉ合金線材
ｉｗ…………端部線材
ｋＤ…………皮剥きダイス
ｎ……………切削刃
Ｃ１…………コイル
Ｓ……………アモルファスシート
Ｒ１，Ｒ２…溝付きロール
Ｓ１…………熱間線材圧延
Ｓ２…………皮剥き工程
W, w ……… Ti alloy wire iw ………… End wire kD ………… Skin peeling die n ………… Cutting blade C1 ………… Coil S …………… Amorphous sheets R1, R2 … Grooved roll S1 ………… Hot wire rolling S2 ………… Skinning process
Claims (2)
上記皮剥き工程において、上記Ｔｉ合金線材の先端面に、係るＴｉ合金よりも軟質のＴｉ合金からなり、且つ上記Ｔｉ合金線材よりも細径の端部線材を、アモルファスシートを介して溶着した後、係る端部線材を含む上記Ｔｉ合金線材を、一対の溝付きロール間に挟み込んでから、上記皮剥きダイスに通す、
ことを特徴とするＴｉ合金線材の皮剥き方法。 Skin that cuts the black skin made of oxide on the surface layer of the Ti alloy wire, which has been reduced to a predetermined wire diameter by hot wire rolling, through the wire in a peeling die having a ring-shaped cutting blade in the warm temperature region the peeling process only contains,
In the skinning step, after the end wire made of a Ti alloy softer than the Ti alloy and having a diameter smaller than the Ti alloy wire is welded to the tip surface of the Ti alloy wire via an amorphous sheet. The Ti alloy wire containing the end wire is sandwiched between a pair of grooved rolls , and then passed through the skinning die .
A method for peeling a Ti alloy wire characterized by the above.
請求項１に記載のＴｉ合金線材の皮剥き方法。 The skinning step is a step of rolling the Ti alloy wire wound in a coil shape after being hot-wire-rolled, making it straight and heating it to a warm temperature region, and then passing the skinning die. ,
The method for peeling a Ti alloy wire according to claim 1.
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