JP3398234B2 - Wire drawing method for small diameter high strength steel wire - Google Patents
Wire drawing method for small diameter high strength steel wireInfo
- Publication number
- JP3398234B2 JP3398234B2 JP27708394A JP27708394A JP3398234B2 JP 3398234 B2 JP3398234 B2 JP 3398234B2 JP 27708394 A JP27708394 A JP 27708394A JP 27708394 A JP27708394 A JP 27708394A JP 3398234 B2 JP3398234 B2 JP 3398234B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- die
- dies
- speed
- cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Metal Extraction Processes (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、湿式伸線により細径の
鋼線を製造する方法に関し、特に直径が０．６ｍｍ以下
で強度が２８００Ｎ／ｍｍ2 以上の鋼線の湿式伸線方法
に係るものである。
【０００２】
【従来の技術】従来の湿式伸線方法は、図１に示すよう
に案内コ−ンＣ及び駆動コ−ンＤを各回転軸線を平行に
して配置し、順次直径が大きくなる複数段とした案内コ
−ン及び駆動コ−ンに伸線される線材を巻き付け、駆動
コ−ンと線材との間に作用する動摩擦力によってコ−ン
の間に配置したダイス群Ｅから順次引抜き所望の直径の
素線を製造している。
【０００３】
【発明が解決しようとする課題】しかるに、この方法に
おいて、夫々のダイスを通過した線材Ｗの速度Ｓは駆動
コ−ンＤの周速Ｖより遅くなるようにダイスの減面率
［減面率＝１−（Ａ1 ／Ａ0 ）：Ａ1 、Ａ2 はパス前後
の伸線材の断面積］が設定されており、これにより線材
Ｗと駆動コ−ンＤとの間にスリップが生じダイスから引
抜く力は動摩擦力に依存している。この動摩擦力は、線
材Ｗと駆動コ−ンＤとのスリップ速度には大きく依存し
ないために、当初に設定した条件のダイス引抜き力で伸
線が実施される。一方、ダイスにより線材Ｗが順次縮径
されるにつれて線材Ｗは硬くなり、ダイスの摩擦は大き
くなる傾向にあり、ダイスの摩擦が始まると急激に摩擦
の進行が著しくなるという欠点が見られる。
【０００４】
【課題を解決するための手段】本発明は以上の欠点を解
決しようとするものであり、スリップ型高強度多段コ−
ン伸線機により湿式伸線する方法であって、最終ダイス
を含めた最終側の５乃至８個のダイスを出た線材の速度
と、駆動コ−ンのダイスに対応する夫々の巻き付け面の
周速との差を実質的に零、即ち線材の速度とダイスの周
速をほぼ同じとすることを特徴とする細径高強度鋼線の
伸線方法に係るものである。
【０００５】
【作用】本発明は、ダイスを出た線材の速度と、駆動コ
−ンのダイスに対応する夫々の巻き付け面の周速との差
を実質的に零とすることを特徴とするものであって、ダ
イスを通過した線材の速度とそれに対応する駆動コ−ン
の周速とをほぼ同じとした理由は、線材と駆動コ−ンと
の間に生じる摩擦を静止摩擦とするためである。
【０００６】以下、本発明の作用を図をもって更に詳細
に説明する。図１に示したスリップ型湿式伸線機の伸線
方法を、この発明の作用を説明するために図２のように
示す。案内コ−ンＣは駆動コ−ンＤから出た線材Ｗを次
のダイスＥに導くためのものであって、ダイスＥに作用
する力には関与していないので省略している。又、駆動
コ−ンＤの複数段状の巻き付け面を個々の駆動ロ−ラ−
として示している。
【０００７】線材Ｗを仕上げ線径とするダイスＥ1 、そ
れに対応する駆動ロ−ラ−をＤ1 として、順次上流側に
ダイスをＥ2 、Ｅ3 、Ｅ4 ‥‥、駆動ロ−ラ−をＤ2 、
Ｄ3、Ｄ4 ‥‥とする。又、駆動コ−ンＤとダイスＥと
の間の線材Ｗに作用する張力をＴとして、上記と同様に
Ｔ1 、Ｔ2 、Ｔ3 、Ｔ4 ‥‥、駆動コ−ンＤの周速を
Ｖ、線材Ｗの速度Ｓとする。
【０００８】さて、従来の伸線方法ではＶ1 ＞Ｓ1 、Ｖ
2 ＞Ｓ2 、Ｖ3 ＞Ｓ3 、Ｖ4 ＞Ｓ4‥‥であるから、駆
動コ−ンＤと線材Ｗとの間は動摩擦となり、駆動コ−ン
Ｄから線材Ｗに与えられる力は駆動コ−ンＤへの線材Ｗ
の巻き付け数に依存する。ここで伸線途中でダイスＥ2
が摩耗し始めたとすると、設定した線径よりも太い線径
の線材ＷがダイスＥ1 に供給されることとなり、このダ
イスＥ1 での伸線加工量が増大してダイスＥ1 の摩耗を
引き起こすこととなる。
【０００９】一方、本発明の伸線方法では、Ｖ＝Ｓ1 、
Ｖ2 ＝Ｓ2 、Ｖ3 ＝Ｓ3 、Ｖ4 ＝Ｓ4 ‥‥であるから、
駆動コ−ンＤと線材Ｗとの間は静止摩擦となり、駆動コ
−ンＤに巻き付けられている線材Ｗの張力も、駆動コ−
ンＤから線材Ｗに与えられる力に関係してくる。しかる
に、前述と同様に伸線途中でダイスＥ2 が摩耗し始めた
とすると、ダイスＥ2 を通過した線材Ｗの直径は大きく
なるので引抜き量が増大するが、一方、ダイスＥ3 での
引抜き量は一定であるために、ダイスＥ2 と駆動ロ−ラ
−Ｄ3 との間の線材Ｗの張力は増加して、ダイスＥ2 の
入口側で引抜き力とは反対方向の力が作用することとな
り、ダイスＥ2 での伸線加工仕事は緩和されてダイスＥ
2の摩耗が抑えられる。
【００１０】尚、線材Ｗの速度Ｓと駆動コ−ンＤの周速
Ｖとの差を零とする範囲を、最終ダイス側から数えて５
乃至８個のダイスまでと限定した理由は次の通りであ
る。即ち、線材Ｗが伸線加工をうけて加工硬化すること
により、線材Ｗの伸びは塑性伸びが減少して弾性伸びが
支配的となる。しかるに、ダイスＥの摩耗により線材Ｗ
の速度Ｓと駆動コ−ンＤの周速Ｖとに僅かな差を生じた
場合、線材Ｗの伸びで前記の僅かな差を埋め合わせるこ
ととなるが、線材Ｗの伸びは殆どが弾性伸びであるた
め、線材Ｗの張力に置き換えられてダイスＥの伸線加工
仕事に反映するからである。この点については図３の実
験例と共に後述する。
【００１１】この発明の伸線方法は上記の作用により効
果があるために、仕上がり鋼線の強度が３０００Ｎ／ｍ
ｍ2 以上である鋼線の伸線加工に対して特に有効であ
る。
【００１２】Ｖ＝Ｓとする手段として、この発明では、
多段駆動コ−ンＤを備えたスリップ型伸線機を用いるた
め、駆動コ−ンＤの各段の周速Ｖに応じてダイスＥの減
面率を適宜選択して線材Ｗの速度Ｓと駆動コ−ンＤの周
速Ｖが同等になるように調整することとなる。尚、Ｖ＝
Ｓとする手段としては、駆動コ−ンＤの各段を別個に駆
動する方法（ノンスリップ伸線機）や、駆動コ−ンＤの
各段の直径及び回転数を、用いられたダイスＥの減面率
に応じて適宜選択する方法がある。
【００１３】
【実施例】以下、実施例及び比較例をもって本発明を更
に詳細に説明する。先ず、直径が５．５ｍｍの高炭素鋼
線材を乾式伸線により１．２３５ｍｍに縮径した。次い
でパテンチング処理、酸洗処理、めっき処理した後、ス
リップ型湿式伸線機により仕上がり線径０．２３０ｍｍ
に縮径した。
【００１４】（実施例）本発明において、ダイスＥの数
は２０個であり、上流側１３個のダイスＥを出た線材Ｗ
の速度Ｓと夫々に対応する駆動コ−ンＤの周速Ｖとの差
を５乃至５０ｍ／ｍｉｎとし、最終ダイスＥを含めて７
個のダイスＥを出た線材Ｗの速度Ｓと駆動コ−ンＤの周
速Ｖとの差をほぼ零とした。
【００１５】（比較例）従来例としてはダイスＥの数は
２０個とし、各ダイスＥを出た線材Ｗの速度Ｓと駆動コ
−ンＤの周速Ｖとの差を３０乃至１５０ｍ／ｍｉｎとし
ている。
【００１６】（結果）仕上がり線径０．２３０ｍｍ、引
張強さ３５００Ｎ／ｍｍ2 の鋼線を１０００ｍ／ｍｉｎ
の速度で伸線する場合、従来の伸線方法では約１トン未
満の伸線量でダイスＥの摩耗が著しくなり断線が発生し
たが、この発明の伸線方法では２トンの伸線量を超えて
も著しいダイスＥの摩耗や断線の発生は無かった。
【００１７】尚、図３は本発明におけるＶ＝Ｓとして、
仕上がり線径０．２３０ｍｍ、引張強さ３５００Ｎ／ｍ
ｍ2 の鋼線を２０個のダイスＥで伸線した場合の最終側
のダイスＥの数と断線率（鋼線を１トン伸線した場合の
伸線中に断線する度合）との関係を示したものである。
この図から分かるように最終側から５〜８個のダイスＥ
数における線材Ｗの線速Ｓと駆動コ−ンＤの周速Ｖを零
とすることが好ましいことが分かる。
【００１８】
【発明の効果】従来のスリップ型湿式伸線機を使用しな
がら、ダイスの減面率或いは駆動コ−ンの直径を適宜選
択することにより、高強度の鋼線を設備投資することな
く生産性良く製造することができる極めて有用な発明で
ある。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a thin steel wire by wet drawing, and more particularly to a method for producing a steel wire having a diameter of 0.6 mm or less and a strength of 2800 N / mm 2. The present invention relates to the above-mentioned wet wire drawing method for steel wire. 2. Description of the Related Art In a conventional wet drawing method, as shown in FIG. 1, a guide cone C and a drive cone D are arranged with their rotation axes parallel to each other, and a plurality of diameters are sequentially increased. The drawn wire is wound around the stepped guide cone and the drive cone, and is sequentially pulled out from the die group E arranged between the cones by the dynamic frictional force acting between the drive cone and the wire. We manufacture strands of the desired diameter. However, in this method, the reduction rate of the dies is set so that the speed S of the wire W passing through each of the dies is lower than the peripheral speed V of the driving cone D. Area reduction = 1− (A 1 / A 0 ): A 1 and A 2 are the cross-sectional areas of the drawn wire before and after the pass], whereby the slip between the wire W and the driving cone D is set. Occurs and the force withdrawn from the die depends on the dynamic friction force. Since this dynamic frictional force does not greatly depend on the slip speed between the wire W and the driving cone D, the wire is drawn with the die pulling force under the initially set conditions. On the other hand, as the diameter of the wire W is gradually reduced by the dies, the wire W becomes harder, and the friction of the dies tends to increase. When the friction of the dies starts, there is a defect that the friction progresses rapidly. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and has a slip-type high-strength multi-stage core.
A wire drawing method using a wire drawing machine, wherein the speed of the wire rod that has exited from the last 5 to 8 dies including the final dies, and the winding surface of each winding surface corresponding to the dies of the driving cone. The present invention relates to a method for drawing a small-diameter high-strength steel wire, wherein the difference from the peripheral speed is substantially zero, that is, the speed of the wire and the peripheral speed of the die are substantially the same. The present invention is characterized in that the difference between the speed of the wire rod exiting the dies and the peripheral speed of each winding surface corresponding to the dies of the driving cone is made substantially zero. The reason why the speed of the wire passing through the die and the corresponding peripheral speed of the drive cone are substantially the same is because the friction generated between the wire and the drive cone is static friction. It is. Hereinafter, the operation of the present invention will be described in more detail with reference to the drawings. The drawing method of the slip type wet drawing machine shown in FIG. 1 is shown in FIG. 2 for explaining the operation of the present invention. The guide cone C is provided for guiding the wire W coming out of the drive cone D to the next die E, and is omitted because it is not involved in the force acting on the die E. Also, a plurality of stepped winding surfaces of the driving cone D are individually
As shown. [0007] die E 1 to finishing line diameter wire W, the drive B corresponding - la - as D 1, E 2 dice sequentially upstream, E 3, E 4 ‥‥, driving Russia - la - To D 2 ,
D 3 , D 4 }. Also, assuming that the tension acting on the wire W between the driving cone D and the die E is T, T 1 , T 2 , T 3 , T 4. V and the speed S of the wire W. In the conventional wire drawing method, V 1 > S 1 , V
2> S 2, V 3> S 3, V 4> from S 4 is ‥‥, drive co - between the emission D and wire W becomes kinetic friction, the driving co - force applied from down D to the wire W is Wire W to drive cone D
Depends on the number of windings. Die E 2 during wire drawing
When but a began to wear, will be the wire W of the thick wire diameter than the wire diameter is set is supplied to the die E 1, the wear of the die E 1 drawing amount in the die E 1 is increased Will cause it. On the other hand, according to the wire drawing method of the present invention, V = S 1 ,
Since V 2 = S 2 , V 3 = S 3 , V 4 = S 4 },
Static friction occurs between the driving cone D and the wire W, and the tension of the wire W wound around the driving cone D also increases.
And the force applied from the wire D to the wire W. However, when the die E 2 during drawing in the same manner as described above began to wear, but withdrawal amount the diameter increases of the wire W which has passed through the die E 2 is increased, whereas, withdrawal amount in the die E 3 to is constant, the die E 2 drive b - tension of the wire W between the La -D 3 is increased, the opposing force acts on the pulling force on the inlet side of the die E 2 And the wire drawing work on the die E 2 is eased and the die E 2
2 wear is suppressed. The range in which the difference between the speed S of the wire W and the peripheral speed V of the drive cone D is zero is counted from the last die side as 5
The reason why the number of dies is limited to eight is as follows. That is, as the wire W undergoes work hardening after drawing, the elongation of the wire W is reduced by plastic elongation, and elastic elongation becomes dominant. However, the wire W
When a slight difference occurs between the speed S and the peripheral speed V of the drive cone D, the slight difference is compensated for by the elongation of the wire W, but the elongation of the wire W is mostly elastic. For this reason, the tension is applied to the wire W and is reflected in the wire drawing work of the die E. This point will be described later together with the experimental example in FIG. Since the wire drawing method of the present invention is more effective due to the above-mentioned effects, the finished steel wire has a strength of 3000 N / m.
This is particularly effective for wire drawing of a steel wire having a diameter of m 2 or more. As means for setting V = S, in the present invention,
In order to use a slip type wire drawing machine provided with a multi-stage drive cone D, the reduction rate of the die E is appropriately selected according to the peripheral speed V of each stage of the drive cone D, and the speed S of the wire W is adjusted. The adjustment is made so that the peripheral speeds V of the drive cones D become equal. Note that V =
As a means for setting S, a method of driving each stage of the driving cone D separately (non-slip wire drawing machine) or the diameter and the number of revolutions of each stage of the driving cone D can be determined by using the die E used. There is a method of appropriately selecting according to the area reduction rate. The present invention will be described below in more detail with reference to Examples and Comparative Examples. First, a high carbon steel wire having a diameter of 5.5 mm was reduced to 1.235 mm by dry drawing. Next, after a patenting treatment, an acid washing treatment, and a plating treatment, the finished wire diameter is 0.230 mm by a slip type wet wire drawing machine.
The diameter was reduced. (Embodiment) In the present invention, the number of the dies E is 20, and the wire rod W exiting the 13 dies E on the upstream side is provided.
The difference between the peripheral speed V of the driving cone D corresponding to each of the speeds S is 5 to 50 m / min.
The difference between the speed S of the wire W exiting from the dies E and the peripheral speed V of the drive cone D was set to substantially zero. (Comparative Example) As a conventional example, the number of the dies E is 20, and the difference between the speed S of the wire W exiting from each of the dies E and the peripheral speed V of the driving cone D is 30 to 150 m / min. And (Results) A steel wire having a finished wire diameter of 0.230 mm and a tensile strength of 3500 N / mm 2 was applied at 1000 m / min.
When the wire is drawn at a speed of not more than 1 ton, the die E wears remarkably and the wire breaks when the wire drawing is less than about 1 ton. However, the wire drawing method of the present invention exceeds the wire drawing of 2 tons. However, no remarkable abrasion of the die E and no breakage occurred. FIG. 3 shows that V = S in the present invention.
Finished wire diameter 0.230mm, tensile strength 3500N / m
The number and disconnection of the final side of the die E in the case where the steel wire m 2 was drawn at 20 dice E the relationship between the (degree of breakage during wire drawing in the case of one ton drawing the steel wire) It is shown.
As can be seen from this figure, 5 to 8 dice E from the last side
It can be seen that it is preferable to set the linear speed S of the wire W and the peripheral speed V of the drive cone D to zero in the numbers. According to the present invention, a high-strength steel wire can be invested by using a conventional slip-type wet wire drawing machine and appropriately selecting a reduction ratio of a die or a diameter of a driving cone. It is a very useful invention that can be manufactured without any high productivity.
【図面の簡単な説明】
【図１】図１はスリップ型伸線機のダイスと駆動コ−ン
とを示す。
【図２】図２はこの発明の伸線方法を説明する図であ
る。
【図３】図３は全ダイスのうち、線材の速度と駆動コ−
ンの周速との差を零としたダイスに対して断線の発生率
を示す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a die and a driving cone of a slip type wire drawing machine. FIG. 2 is a diagram illustrating a wire drawing method according to the present invention. FIG. 3 is a diagram showing the speed of a wire rod and a driving code among all dies.
FIG. 9 is a diagram showing the rate of occurrence of disconnection for a die whose difference from the peripheral speed of the die is set to zero.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−10020（ＪＰ，Ａ) 特開 平４−322812（ＪＰ，Ａ) 特開 昭61−286016（ＪＰ，Ａ) 実開 平２−38114（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21C 1/00 - 19/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-10020 (JP, A) JP-A-4-322812 (JP, A) JP-A-61-286016 (JP, A) 38114 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B21C 1/00-19/00
Claims (1)
り湿式伸線する方法であって、最終ダイスを含めた最終
側の５乃至８個のダイスを出た線材の速度と、駆動コ−
ンのダイスに対応する夫々の巻き付け面の周速との差を
実質的に零とすることを特徴とする細径高強度鋼線の伸
線方法。(57) [Claim 1] A method of wet drawing by a slip-type high-strength multi-stage cone drawing machine, wherein 5 to 8 dies on the final side including the final die are drawn. The speed of the output wire and the driving core
A method of drawing a small-diameter high-strength steel wire, wherein a difference between a peripheral speed of each winding surface corresponding to each of the dies is substantially zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27708394A JP3398234B2 (en) | 1994-10-17 | 1994-10-17 | Wire drawing method for small diameter high strength steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27708394A JP3398234B2 (en) | 1994-10-17 | 1994-10-17 | Wire drawing method for small diameter high strength steel wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08117836A JPH08117836A (en) | 1996-05-14 |
| JP3398234B2 true JP3398234B2 (en) | 2003-04-21 |
Family
ID=17578547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27708394A Expired - Fee Related JP3398234B2 (en) | 1994-10-17 | 1994-10-17 | Wire drawing method for small diameter high strength steel wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3398234B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228911A (en) * | 2011-05-21 | 2011-11-02 | 张家港市亨昌焊材有限公司 | Vertical deadbeat wire drawing equipment |
-
1994
- 1994-10-17 JP JP27708394A patent/JP3398234B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08117836A (en) | 1996-05-14 |
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