JP4948010B2 - Drawing method of brass plated steel wire - Google Patents

Drawing method of brass plated steel wire Download PDF

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JP4948010B2
JP4948010B2 JP2006080051A JP2006080051A JP4948010B2 JP 4948010 B2 JP4948010 B2 JP 4948010B2 JP 2006080051 A JP2006080051 A JP 2006080051A JP 2006080051 A JP2006080051 A JP 2006080051A JP 4948010 B2 JP4948010 B2 JP 4948010B2
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lubricating liquid
brass
steel wire
plated steel
downstream
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JP2007253186A (en
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義昭 大野
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Bridgestone Corp
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Description

本発明は、タイヤ用スチールコード等のゴム物品補強材として用いられるブラスめっきスチールワイヤの製造方法に関し、特に、この製造方法に使用する潤滑液の成分及び温度条件に関する。   The present invention relates to a method for manufacturing brass-plated steel wire used as a reinforcing material for rubber articles such as steel cords for tires, and more particularly to the components and temperature conditions of a lubricating liquid used in this manufacturing method.

ゴム物品の典型である空気入りラジアルタイヤでは、プライやベルト部に、ブラスメッキが施されたブラスめっきスチールワイヤを複数本撚り合わせたスチールコードをゴムで被覆したものを適用し、このスチールコードにより、タイヤの補強を図っている。上記ブラスめっきスチールワイヤは、表面にブラスメッキが施されたブラスめっきスチールワイヤを、潤滑液槽内の潤滑液中に配置された複数のダイス、最終ダイスに通して所望の線径に伸線処理したものが使用される。
従来、水又はグリコール等に有機脂肪酸等の油成分とリン酸エステルやエチレンジアミン等の極圧成分と乳化剤と発泡抑制剤と防錆剤とを含有して形成された潤滑液を使用し、リン酸エステルの亜鉛錯体等によってブラスめっきスチールワイヤやダイスの表面に強力な化学バリヤ(極圧皮膜)を形成させて極圧性能(耐荷重性能)を向上させることによって、伸線時のダイスとブラスめっきスチールワイヤとの間の摩擦を低減させ、ダイス、ブラスめっきスチールワイヤの損傷を抑制している。また、伸線処理の際のブラスめっきスチールワイヤの温度上昇を抑制するために、潤滑液の液温を下げることが知られている。
特開2002−28716公報 特開昭61−165221号公報 特開平8−132128号公報 特開平8−57531号公報
In pneumatic radial tires, which are typical rubber articles, steel cords made by twisting a plurality of brass-plated steel wires with brass plating on the ply and belt are applied with rubber. Reinforce tires. The above-mentioned brass-plated steel wire is drawn to a desired wire diameter by passing a brass-plated steel wire with a brass plating on the surface through a plurality of dies arranged in the lubricating liquid in the lubricating liquid tank and the final die. Used.
Conventionally, using a lubricating liquid formed by containing an oil component such as organic fatty acid in water or glycol, an extreme pressure component such as phosphate ester or ethylenediamine, an emulsifier, a foam inhibitor and a rust inhibitor, phosphoric acid Dies and brass plating during wire drawing by forming a strong chemical barrier (extreme pressure film) on the surface of brass plated steel wires and dies with zinc complex of ester etc. to improve extreme pressure performance (load bearing performance) Friction with steel wire is reduced and damage to dies and brass plated steel wires is suppressed. Moreover, in order to suppress the temperature rise of the brass plating steel wire in the wire drawing process, it is known to lower the temperature of the lubricating liquid.
JP 2002-28716 A JP 61-165221 A JP-A-8-132128 JP-A-8-57531

しかしながら、潤滑液の液温を30℃以下に下げると、ブラスめっきスチールワイヤやダイスの表面(引抜穴の穴壁表面)の極圧皮膜生成反応が抑制されて、ブラスめっきスチールワイヤの伸線性が低下し、延性の優れたブラスめっきスチールワイヤを製造できない。
係る課題に鑑み、本発明は、30℃以下の潤滑液を用いた場合においても、延性低下の原因となる伸線処理の際のブラスめっきスチールワイヤの温度上昇を抑制できるとともに、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できて、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できるブラスめっきスチールワイヤの伸線方法を提供することを目的とする。
However, when the temperature of the lubricating liquid is lowered to 30 ° C. or less, the extreme pressure film formation reaction on the surface of the brass-plated steel wire or die (the surface of the hole wall of the drawing hole) is suppressed, and the drawability of the brass-plated steel wire is reduced. Reduced and unable to produce brass plated steel wire with excellent ductility.
In view of the problem, the present invention can suppress the temperature increase of the brass-plated steel wire during the wire-drawing process, which causes ductility reduction, even when a lubricating liquid of 30 ° C. or less is used, and the brass-plated steel wire An object of the present invention is to provide a method of drawing a brass-plated steel wire that can suppress a decrease in the reaction of forming an extreme pressure film on the surface of a die and a die and that can manufacture a brass-plated steel wire excellent in wire drawability and ductility.

本発明は、油成分と極圧成分とを含んだ潤滑液を用いてブラスめっきスチールワイヤを伸線するブラスめっきスチールワイヤの伸線方法において、最終ダイスが設置された下流潤滑液槽と複数のダイスが設置された上流潤滑液槽とを備えた伸線装置を用い、下流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、温度15℃以上30℃以下の潤滑液を用いたこと特徴とする。
20℃以下の潤滑液を用いたことも特徴とする。
上流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、30℃以上の潤滑液を用いたことも特徴とする。
極圧皮膜生成反応の低下を抑制する成分が、ZnDTPであることも特徴とする。
潤滑液が、界面活性剤としてポリオキシエチレン−アルキルエーテルを含有することも特徴とする。
潤滑液が、ZnDTPとポリオキシエチレン−アルキルエーテルとをそれぞれ0.5重量%含有することも特徴とする。
ブラスめっきスチールワイヤが下流潤滑液槽において引張り強さ2500MPaを超える引張り強さで伸線処理されることも特徴とする。
This onset Ming, the drawing method of brass-plated steel wire for drawing the brass-plated steel wire with a lubricant containing an oil component and a polar pressure component, downstream lubricant tank final die is placed and a plurality Using a wire drawing device provided with an upstream lubricating liquid tank in which a die is installed, containing as a lubricating liquid in the downstream lubricating liquid tank, a component that suppresses a decrease in the extreme pressure film formation reaction, and a temperature of 15 ° C. characterized by using the lubricating fluid of 30 ° C. or less.
It is also characterized by using a lubricating liquid of 20 ° C. or lower.
The lubricating liquid in the upstream lubricating liquid tank is also characterized in that it contains a component that suppresses the decrease in the extreme pressure film formation reaction, and a lubricating liquid at 30 ° C. or higher is used.
The component which suppresses the fall of an extreme pressure film | membrane production | generation reaction is also characterized by being ZnDTP.
The lubricating liquid is also characterized by containing polyoxyethylene-alkyl ether as a surfactant.
The lubricating liquid is also characterized by containing 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether, respectively.
It is also characterized in that the brass-plated steel wire is drawn at a tensile strength exceeding 2500 MPa in the downstream lubricating liquid tank.

本発明によれば、下流潤滑液槽と上流潤滑液槽とを備えた伸線装置を用いる場合において、下流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、温度15℃以上30℃以下の潤滑液を用いたことで、延性低下の原因となる伸線処理の際のブラスめっきスチールワイヤの温度上昇を抑制できるとともに、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できて、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できる。
20℃以下の潤滑液を用いたことで、伸線処理の際のブラスめっきスチールワイヤの温度上昇を抑制できて、製造されるブラスめっきスチールワイヤの延性を向上できる。
上流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、30℃以上の潤滑液を用いたことで、上流潤滑液槽内でのブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できるので、製造されるブラスめっきスチールワイヤの伸線性を向上できる。
極圧皮膜生成反応の低下を抑制する成分としてZnDTPを用いたことで、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できるので、製造されるブラスめっきスチールワイヤの伸線性を向上できる。
潤滑液に、界面活性剤としてポリオキシエチレン−アルキルエーテルを含有させたことで、ZnDTPの分散性を改善でき、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できるので、製造されるブラスめっきスチールワイヤの伸線性を向上できる。
潤滑液に、ZnDTPとポリオキシエチレン−アルキルエーテルとをそれぞれ0.5重量%含有させたことで、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応低下を効果的に抑制できるので、製造されるブラスめっきスチールワイヤの伸線性を向上できる。
2500MPaを超える引張り強さで伸線処理する部分では、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成が抑制されやすい。このため、ブラスめっきスチールワイヤが引張り強さ2500MPaを超える引張り強さで伸線処理される下流潤滑液槽内の下流潤滑液の条件を上記のようにすることによって、ブラスめっきスチールワイヤの温度上昇を抑制するとともに、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制でき、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できる。
According to the present invention, in the case of using a wire drawing apparatus having a lower flow lubricating fluid tank and the upstream lubricating liquid tank, as a lubricating fluid in the downstream lubricant tank, a component to suppress decrease in the pole圧皮film formation reaction Containing and using a lubricating liquid having a temperature of 15 ° C. or higher and 30 ° C. or lower can suppress an increase in the temperature of the brass-plated steel wire during the wire-drawing process that causes a decrease in ductility. A reduction in the extreme pressure film formation reaction on the surface of the die can be suppressed, and a brass-plated steel wire excellent in wire drawability and ductility can be produced.
By using a lubricating liquid of 20 ° C. or lower, the temperature increase of the brass-plated steel wire during the wire drawing process can be suppressed, and the ductility of the manufactured brass-plated steel wire can be improved.
As a lubricating liquid in the upstream lubricating liquid tank, it contains a component that suppresses the decrease in the extreme pressure film formation reaction, and a lubricating liquid at 30 ° C. or higher is used, so that the brass-plated steel wire in the upstream lubricating liquid tank Since the reduction of the extreme pressure film formation reaction on the surface of the die and the die can be suppressed, the drawability of the manufactured brass-plated steel wire can be improved.
By using ZnDTP as a component that suppresses the decrease in the extreme pressure film formation reaction, it is possible to suppress the decrease in the extreme pressure film formation reaction on the surface of the brass-plated steel wire or die, so that the drawability of the manufactured brass-plated steel wire Can be improved.
By including polyoxyethylene-alkyl ether as a surfactant in the lubricating liquid, it is possible to improve the dispersibility of ZnDTP and suppress the reduction of the extreme pressure film formation reaction on the surface of the brass-plated steel wire or die, The drawability of the brass-plated steel wire produced can be improved.
By containing 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether in the lubricating liquid, it is possible to effectively suppress the decrease in the extreme pressure film formation reaction on the surface of brass-plated steel wires and dies. It is possible to improve the drawability of the brass plated steel wire.
In the portion where the drawing process is performed with a tensile strength exceeding 2500 MPa, the formation of an extreme pressure film on the surface of the brass-plated steel wire or the die is easily suppressed. Therefore, the temperature of the brass-plated steel wire is increased by setting the conditions of the downstream lubricant in the downstream lubricant tank in which the brass-plated steel wire is drawn with a tensile strength exceeding 2500 MPa as described above. In addition, it is possible to suppress a reduction in the extreme pressure film formation reaction on the surface of the brass-plated steel wire or the die, and it is possible to manufacture a brass-plated steel wire excellent in wire drawability and ductility.

図1を参照し、最良の形態におけるブラスめっきスチールワイヤの伸線方法に用いる伸線装置1を説明する。伸線装置1は、伸線機10、潤滑液タンク20、冷却槽30を備える。伸線機10は、巻出部10S、上流潤滑液槽10A、下流潤滑液槽10B、図外の巻取部を備える。上流潤滑液槽10Aと下流潤滑液槽10Bとは隔壁11で区画され、隔壁11にはワイヤ通過孔12が形成される。上流潤滑液15で満たされた上流潤滑液槽10A内には、巻出部10Sから巻き出されたブラスめっきスチールワイヤ17を線引きする複数のダイス18及びブラスめっきスチールワイヤ17を下流側に案内する複数の駆動キャプスタン19が設けられる。下流潤滑液16で満たされた下流潤滑液槽10B内には、上流潤滑液槽10Aで伸線処理された及びブラスめっきスチールワイヤ17を線引きする複数のダイス21及び最終ダイス21Z、ブラスめっきスチールワイヤ17を案内する複数の駆動キャプスタン19が設けられる。上流潤滑液槽10Aでは、ブラスめっきスチールワイヤ17が引張り強さ2500MPa(メガパスカル)以下の引張り強さで伸線処理される。下流潤滑液槽10Bでは、ブラスめっきスチールワイヤ17が引張り強さ2500MPaを超える引張り強さで伸線処理される。   With reference to FIG. 1, the wire drawing apparatus 1 used for the drawing method of the brass plating steel wire in the best form is demonstrated. The wire drawing device 1 includes a wire drawing machine 10, a lubricating liquid tank 20, and a cooling tank 30. The wire drawing machine 10 includes an unwinding unit 10S, an upstream lubricating liquid tank 10A, a downstream lubricating liquid tank 10B, and a winding unit (not shown). The upstream lubricating liquid tank 10 </ b> A and the downstream lubricating liquid tank 10 </ b> B are partitioned by a partition wall 11, and a wire passage hole 12 is formed in the partition wall 11. In the upstream lubricating liquid tank 10A filled with the upstream lubricating liquid 15, a plurality of dies 18 for drawing the brass-plated steel wire 17 unwound from the unwinding portion 10S and the brass-plated steel wire 17 are guided downstream. A plurality of drive capstans 19 are provided. In the downstream lubricating liquid tank 10B filled with the downstream lubricating liquid 16, a plurality of dies 21 and final dies 21Z for drawing the brass plated steel wire 17 drawn in the upstream lubricating liquid tank 10A and a brass plated steel wire are drawn. A plurality of drive capstans 19 for guiding 17 are provided. In the upstream lubricating liquid tank 10A, the brass-plated steel wire 17 is drawn at a tensile strength of 2500 MPa (megapascal) or less. In the downstream lubricating liquid tank 10B, the brass-plated steel wire 17 is drawn at a tensile strength exceeding 2500 MPa.

潤滑液タンク20内には、上流潤滑液槽10A及び冷却槽30に供給される潤滑液が貯蔵される。冷却槽30は、図外の冷却剤供給装置から供給される冷媒を通過させる冷媒通過管等を有した冷却機32を備える。潤滑液タンク20と上流潤滑液槽10Aとが開閉弁22を備えた供給管23によって互いに繋がれ、上流潤滑液槽10Aには、潤滑液タンク20から冷却処理を経ない潤滑液が上流潤滑液15として直接供給される。潤滑液タンク20と冷却槽30とが開閉弁24を備えた供給管25によって互いに繋がれ、冷却槽30には潤滑液タンク20から潤滑液が供給される。冷却槽30と下流潤滑液槽10Bとが開閉弁26を備えた供給管27によって互いに繋がれ、下流潤滑液槽10Bには、潤滑液タンク20から冷却槽30を経由して温度調整された潤滑剤が下流潤滑液16として供給される。上流潤滑液槽10Aと潤滑液タンク20とが開閉弁28を備えた戻し管29によって互いに繋がれ、下流潤滑液槽10Bと潤滑液タンク20とが開閉弁35を備えた戻し管31によって互いに繋がれる。上流潤滑液槽10Aと下流潤滑液槽10Bとにはそれぞれ図外の温度検出器が設置され、図外の制御装置が温度検出器からの温度を入力して上流潤滑液槽10A内の上流潤滑液15及び下流潤滑液槽10B内の下流潤滑液16が設定温度に保たれるように開閉弁22;24:26;28;35の開閉制御を行う。なお、潤滑液タンク20には図外のヒーターが設けられる。制御装置が、潤滑液タンク20のヒーターのオンオフを制御して潤滑液タンク20内の潤滑液の温度を調整するとともに、冷却槽30の冷却機32を制御して下流潤滑液槽10Bの下流潤滑液16の温度を調整する。   In the lubricating liquid tank 20, the lubricating liquid supplied to the upstream lubricating liquid tank 10A and the cooling tank 30 is stored. The cooling tank 30 includes a cooler 32 having a refrigerant passage pipe and the like for allowing the refrigerant supplied from a coolant supply device (not shown) to pass therethrough. The lubricating liquid tank 20 and the upstream lubricating liquid tank 10A are connected to each other by a supply pipe 23 provided with an on-off valve 22. In the upstream lubricating liquid tank 10A, a lubricating liquid that has not undergone a cooling process from the lubricating liquid tank 20 flows into the upstream lubricating liquid. 15 is supplied directly. The lubricating liquid tank 20 and the cooling tank 30 are connected to each other by a supply pipe 25 having an on-off valve 24, and the lubricating liquid is supplied to the cooling tank 30 from the lubricating liquid tank 20. The cooling tank 30 and the downstream lubricating liquid tank 10B are connected to each other by a supply pipe 27 having an on-off valve 26. The downstream lubricating liquid tank 10B has a temperature-controlled lubrication from the lubricating liquid tank 20 via the cooling tank 30. The agent is supplied as the downstream lubricating liquid 16. The upstream lubricating liquid tank 10A and the lubricating liquid tank 20 are connected to each other by a return pipe 29 having an on-off valve 28, and the downstream lubricating liquid tank 10B and the lubricating liquid tank 20 are connected to each other by a return pipe 31 having an on-off valve 35. It is. A temperature detector (not shown) is installed in each of the upstream lubricating liquid tank 10A and the downstream lubricating liquid tank 10B, and a control device (not shown) inputs the temperature from the temperature detector to perform upstream lubrication in the upstream lubricating liquid tank 10A. The opening / closing control of the opening / closing valves 22; 24: 26; 28; 35 is performed so that the liquid 15 and the downstream lubricating liquid 16 in the downstream lubricating liquid tank 10B are maintained at the set temperature. The lubricant tank 20 is provided with a heater (not shown). The control device controls on / off of the heater of the lubricating liquid tank 20 to adjust the temperature of the lubricating liquid in the lubricating liquid tank 20, and controls the cooler 32 of the cooling tank 30 to downstream lubricate the downstream lubricating liquid tank 10B. The temperature of the liquid 16 is adjusted.

最良の形態では、潤滑液タンク20、冷却槽30、上流潤滑液槽10A、下流潤滑液槽10Bを循環する潤滑液として、極圧皮膜生成反応の低下を抑制する成分(潤滑液の温度が30℃以下のように低温の場合でも極圧皮膜生成反応を低下させにくくする成分)であるZnDTP(ジアルキルジチオリン酸亜鉛)を0.5重量%及びZnDTPの分散性を改善するための界面活性剤としてポリオキシエチレン−アルキルエーテルを0.5重量%含有したものを用いるとともに、下流潤滑液槽10B内の下流潤滑液16の温度を15℃以上30℃以下にし、上流潤滑液槽10A内の上流潤滑液15の温度を30℃以上とした。   In the best mode, the lubricating liquid circulating through the lubricating liquid tank 20, the cooling tank 30, the upstream lubricating liquid tank 10A, and the downstream lubricating liquid tank 10B is a component that suppresses the decrease in the extreme pressure film formation reaction (the lubricating liquid temperature is 30). ZnDTP (zinc dialkyldithiophosphate), which is a component that makes it difficult to reduce the extreme pressure film formation reaction even at low temperatures such as ℃ or less, and 0.5% by weight as a surfactant for improving the dispersibility of ZnDTP While using 0.5% by weight of polyoxyethylene-alkyl ether, the temperature of the downstream lubricating liquid 16 in the downstream lubricating liquid tank 10B is set to 15 ° C. or higher and 30 ° C. or lower, and upstream lubricating in the upstream lubricating liquid tank 10A. The temperature of the liquid 15 was 30 ° C. or higher.

最良の形態では、一般的なエマルジョンタイプの潤滑剤を原液として用い、この原液潤滑剤を水で希釈した希釈潤滑剤液にZnDTP及びポリオキシエチレン−アルキルエーテルを添加することによって、ZnDTP及びポリオキシエチレン−アルキルエーテルがそれぞれ0.5重量%ずつ含有された希釈潤滑剤液を作成し、この作成された希釈潤滑剤液を上記潤滑液として用いた。   In the best mode, a general emulsion-type lubricant is used as a stock solution, and ZnDTP and polyoxyethylene-alkyl ether are added to a diluted lubricant solution obtained by diluting the stock solution lubricant with water to obtain ZnDTP and polyoxyethylene. A diluted lubricant liquid containing 0.5% by weight of ethylene-alkyl ether was prepared, and the prepared diluted lubricant liquid was used as the lubricating liquid.

上述した一般的なエマルジョンタイプの潤滑剤は、例えば、水又はグリコール等の媒体中に、有機脂肪酸等の油成分、リン酸エステルやエチレンジアミン等の極圧成分、乳化剤、発泡抑制剤、防錆剤等を分散させた乳濁液から成り、湿式伸線においては、通常、5〜20倍に希釈して用いられるものである。原液潤滑剤中における潤滑成分の含有量は、例えば、極圧成分が約1〜10重量%、油成分が1〜15重量%程度である。防錆剤としては、例えば、パラオキシ安息酸メチル、ビスフェノールA、ベンゾトリアゾール、メチルベンゾトリアゾールなどが添加されており、原液潤滑剤中における含有量は0.1〜1.0重量%である。   The general emulsion type lubricants described above are, for example, oil components such as organic fatty acids, extreme pressure components such as phosphate esters and ethylenediamine, emulsifiers, foam inhibitors, and rust inhibitors in a medium such as water or glycol. In the wet wire drawing, it is usually used after being diluted 5 to 20 times. The content of the lubricating component in the stock solution lubricant is, for example, about 1 to 10% by weight for the extreme pressure component and about 1 to 15% by weight for the oil component. As the rust preventive agent, for example, methyl paraoxybenzoate, bisphenol A, benzotriazole, methylbenzotriazole and the like are added, and the content in the stock solution lubricant is 0.1 to 1.0% by weight.

パテンティングとブラスメッキを施した直径が1.4mmのブラスめっきスチールワイヤを、最終直径0.20mm、抗張力4500MPaとなるまで、様々な条件の実施例及び従来例で製造した。実施例及び従来例(比較例)の条件及び製造されたブラスめっきスチールワイヤの伸線加工評価(伸線性、延性)結果を図2に示す。図2の伸線性(寿命)、延性の値は、従来例1での値を基準100で表した場合の相対的な評価指数値で表してあり、値が大きいほど優れていることを示す。   A brass-plated steel wire having a diameter of 1.4 mm subjected to patenting and brass plating was produced in various examples and conventional examples until the final diameter was 0.20 mm and the tensile strength was 4500 MPa. FIG. 2 shows the conditions of Examples and Conventional Examples (Comparative Examples) and the results of drawing process evaluation (drawing property and ductility) of the manufactured brass-plated steel wires. The wire drawing (life) and ductility values in FIG. 2 are expressed as relative evaluation index values when the value in Conventional Example 1 is represented by the standard 100, and the larger the value, the better.

従来例1は、極圧皮膜生成反応の低下を抑制する成分を含有しない(図2及び以下において、極圧強化無しという)上流潤滑液15及び下流潤滑液16を用い、上流潤滑液15の温度(図2及び以下において、上流設定温度という)及び下流潤滑液16の温度(図2及び以下において、下流設定温度という)をともに40℃とした場合である。即ち、ZnDTPとポリオキシエチレン−アルキルエーテルとが添加されていない潤滑液を、潤滑液タンク20から冷却槽30を経由させないで上流潤滑液槽10A及び下流潤滑液槽10Bに上流潤滑液15および下流潤滑液16として直接供給し、上流設定温度を40℃に設定し、下流設定温度を40℃に設定した。   Conventional Example 1 does not contain a component that suppresses the decrease in the extreme pressure film formation reaction (in FIG. 2 and below, referred to as “no extreme pressure enhancement”), and the upstream lubricant 15 and the temperature of the upstream lubricant 15 are used. This is a case where the temperature of the downstream lubricating liquid 16 (referred to as the downstream set temperature in FIG. 2 and the following) is 40 ° C. (referred to as the upstream set temperature in FIG. 2 and the following). That is, the lubricating liquid to which ZnDTP and polyoxyethylene-alkyl ether are not added is transferred from the lubricating liquid tank 20 to the upstream lubricating liquid tank 10A and the downstream lubricating liquid tank 10B without passing through the cooling tank 30 and the downstream lubricating liquid 15 and downstream. The lubricating liquid 16 was directly supplied, the upstream set temperature was set to 40 ° C., and the downstream set temperature was set to 40 ° C.

従来例2は、極圧皮膜生成反応の低下を抑制する成分を含有しない上流潤滑液15及び下流潤滑液16を用い、上流設定温度を40℃とし、下流設定温度を20℃とした場合である。即ち、図1の伸線装置1を使用し、ZnDTPとポリオキシエチレン−アルキルエーテルとが添加されていない潤滑液を上流潤滑液槽10A及び下流潤滑液槽10Bに上流潤滑液15および下流潤滑液16として供給し、上流設定温度を40℃に設定し、下流設定温度を20℃に設定した。従来例2の場合、下流設定温度が30℃以下であるため、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応が抑制され、製造されたブラスめっきスチールワイヤの伸線性及び延性がともに従来例1よりも悪かった。   Conventional Example 2 is a case where an upstream lubricating liquid 15 and a downstream lubricating liquid 16 that do not contain a component that suppresses a decrease in the extreme pressure film formation reaction are used, the upstream set temperature is 40 ° C., and the downstream set temperature is 20 ° C. . That is, using the wire drawing apparatus 1 of FIG. 1, the upstream lubricant solution 15 and the downstream lubricant solution are added to the upstream lubricant tank 10A and the downstream lubricant tank 10B by adding the lubricating liquid to which ZnDTP and polyoxyethylene-alkyl ether are not added. 16, the upstream set temperature was set to 40 ° C., and the downstream set temperature was set to 20 ° C. In the case of Conventional Example 2, since the downstream set temperature is 30 ° C. or less, the extreme pressure film formation reaction on the surface of the brass-plated steel wire and the die is suppressed, and both the drawability and ductility of the manufactured brass-plated steel wire are conventional. It was worse than Example 1.

実施例1では、潤滑液タンク20に貯蔵された潤滑液は、極圧皮膜生成反応の低下を抑制する成分としてのZnDTP(ジアルキルジチオリン酸亜鉛)を0.5重量%添加し、ZnDTPの分散性を改善するための界面活性剤としてポリオキシエチレン−アルキルエーテルを0.5重量%添加したものを用いた。そして、上流設定温度を40℃に設定し、下流設定温度を20℃に設定した。実施例1では、ZnDTP及びポリオキシエチレン−アルキルエーテルをそれぞれ0.5重量%ずつ含有し、20℃以下の下流潤滑液16を用いため、ZnDTPによって下流潤滑液槽10B内でのブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できるとともに、20℃以下の下流潤滑液16を用いたため、伸線処理の際のブラスめっきスチールワイヤの温度上昇を抑制できる。さらに、上流潤滑液として30℃以上の潤滑液15を用いたことで、上流潤滑液槽10A内でのブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制できる。したがって、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できた。   In Example 1, 0.5% by weight of ZnDTP (zinc dialkyldithiophosphate) is added to the lubricating liquid stored in the lubricating liquid tank 20 as a component that suppresses the decrease in the extreme pressure film formation reaction, and the dispersibility of ZnDTP As a surfactant for improving the viscosity, a polyoxyethylene-alkyl ether added at 0.5% by weight was used. The upstream set temperature was set to 40 ° C., and the downstream set temperature was set to 20 ° C. In Example 1, since 0.5D by weight of ZnDTP and polyoxyethylene-alkyl ether are used and the downstream lubricating liquid 16 at 20 ° C. or lower is used, the brass-plated steel wire in the downstream lubricating liquid tank 10B with ZnDTP is used. Since the downstream lubricating liquid 16 of 20 ° C. or lower can be used, the temperature increase of the brass-plated steel wire during the wire drawing process can be suppressed. Furthermore, by using the lubricating liquid 15 at 30 ° C. or higher as the upstream lubricating liquid, it is possible to suppress a decrease in the extreme pressure film forming reaction on the surface of the brass plating steel wire or the die in the upstream lubricating liquid tank 10A. Therefore, the brass plating steel wire excellent in the wire drawing property and ductility was able to be manufactured.

実施例2では、図1において、上流潤滑液槽10Aに上流潤滑液15を供給する潤滑液タンクと、冷却槽30に下流潤滑液16を供給する潤滑液タンクとを個別に設け、ZnDTPとポリオキシエチレン−アルキルエーテルとが添加されていない上流潤滑液15と、ZnDTPとポリオキシエチレン−アルキルエーテルとをそれぞれ0.5重量%添加した下流潤滑液16とを使用し、上流設定温度を40℃に設定し、下流設定温度を20℃に設定した。実施例2では、下流設定温度を20℃としたことによる温度上昇抑制作用によってブラスめっきスチールワイヤの延性が向上したとともに、ZnDTPを含有させた下流潤滑液16を用いたことによって、下流設定温度を20℃としたにもかかわらず極圧皮膜生成反応の低下を抑制でき、伸線性も維持できた。   In Example 2, a lubricating liquid tank that supplies the upstream lubricating liquid 15 to the upstream lubricating liquid tank 10A and a lubricating liquid tank that supplies the downstream lubricating liquid 16 to the cooling tank 30 are separately provided in FIG. The upstream lubricating liquid 15 to which oxyethylene-alkyl ether is not added and the downstream lubricating liquid 16 to which 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether are added are used, and the upstream set temperature is 40 ° C. The downstream set temperature was set to 20 ° C. In Example 2, the ductility of the brass-plated steel wire was improved by the temperature rise suppressing action by setting the downstream set temperature to 20 ° C., and the downstream set temperature was set by using the downstream lubricating liquid 16 containing ZnDTP. Despite being 20 ° C., the decrease in the extreme pressure film formation reaction could be suppressed, and the drawability could be maintained.

実施例3では、下流潤滑液槽10Bに冷却槽30で温度調整した下流潤滑液16を供給するとともに、上流潤滑液槽10Aにも冷却槽30で温度調整した上流潤滑液15を供給するようにし、上流潤滑液15及び下流潤滑液16として、ZnDTPとポリオキシエチレン−アルキルエーテルとをそれぞれ0.5重量%添加した潤滑液を使用し、上流設定温度を20℃に設定し、下流設定温度を20℃に設定した。実施例3によれば、上流設定温度及び下流設定温度をともに20℃にしたことによる温度上昇抑制作用によってブラスめっきスチールワイヤの延性が向上したが、潤滑液全体の温度を30℃以下の20℃としたため、ZnDTPによって極圧皮膜生成反応の低下を抑制する効果が薄れ、伸線性は従来例1より悪かった。   In the third embodiment, the downstream lubricating liquid 16 whose temperature is adjusted in the cooling tank 30 is supplied to the downstream lubricating liquid tank 10B, and the upstream lubricating liquid 15 whose temperature is adjusted in the cooling tank 30 is also supplied to the upstream lubricating liquid tank 10A. As the upstream lubricating liquid 15 and the downstream lubricating liquid 16, a lubricating liquid added with 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether is used, the upstream set temperature is set to 20 ° C., and the downstream set temperature is set to Set to 20 ° C. According to Example 3, the ductility of the brass-plated steel wire was improved by the action of suppressing the temperature rise by setting both the upstream set temperature and the downstream set temperature to 20 ° C. However, the temperature of the entire lubricating liquid was 20 ° C., which was 30 ° C. or less. Therefore, the effect of suppressing the decrease in the extreme pressure film formation reaction by ZnDTP was weakened, and the drawability was worse than that of Conventional Example 1.

実施例4;5では、潤滑液の温度を、極圧皮膜生成反応の低下が生じる臨界である30℃に設定し、ZnDTP及びポリオキシエチレン−アルキルエーテルを含有した潤滑液を用いた場合と、ZnDTP及びポリオキシエチレン−アルキルエーテルを含有しない潤滑液を用いた場合とで比較した。ZnDTP及びポリオキシエチレン−アルキルエーテルをそれぞれ0.5重量%含有し、設定温度が、極圧皮膜生成反応の低下が生じる臨界である30℃に設定された潤滑液を用いた実施例5では、ZnDTPにより極圧皮膜生成反応の低下を抑制できて、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できた。尚、実施例5と実施例1とを比較すると、実施例1の方が延性の優れたブラスめっきスチールワイヤを製造できた。これは、実施例1の方が下流設定温度が低いため、下流側での温度上昇抑制作用が効いたと考えられる。言い換えれば、実施例5では、下流設定温度の冷却不足のため、実施例1と比べて延性が悪くなったと考えられる。一方、温度30℃以下でかつZnDTP及びポリオキシエチレン−アルキルエーテルを含有しない潤滑液を用いた実施例4では、極圧皮膜生成反応が低下し、また、温度上昇抑制効果も少ないために、得られたブラスめっきスチールワイヤは伸線性及び延性ともに悪かった。つまり、潤滑液の液温を30℃以下に下げると、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応が抑制されて、ブラスめっきスチールワイヤの伸線性が低下し、延性の優れたブラスめっきスチールワイヤを製造できないことがわかった。   In Examples 4 and 5, the temperature of the lubricating liquid is set to 30 ° C., which is a critical point where the extreme pressure film formation reaction is lowered, and a lubricating liquid containing ZnDTP and polyoxyethylene-alkyl ether is used. Comparison was made with the case of using a lubricating liquid not containing ZnDTP and polyoxyethylene-alkyl ether. In Example 5 using a lubricating liquid containing 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether, respectively, and the set temperature was set to 30 ° C., which is a critical point at which the extreme pressure film formation reaction is reduced, A decrease in the extreme pressure film formation reaction could be suppressed by ZnDTP, and a brass-plated steel wire excellent in wire drawability and ductility could be produced. In addition, when Example 5 was compared with Example 1, the direction of Example 1 was able to manufacture the brass plating steel wire excellent in ductility. This is considered to be because the downstream side temperature is lower in Example 1, and the temperature rise suppressing effect on the downstream side is effective. In other words, in Example 5, it is considered that the ductility deteriorated compared to Example 1 due to insufficient cooling of the downstream set temperature. On the other hand, in Example 4 using a lubricating liquid having a temperature of 30 ° C. or lower and not containing ZnDTP and polyoxyethylene-alkyl ether, the extreme pressure film formation reaction is lowered and the temperature rise suppressing effect is small. The resulting brass-plated steel wire was poor in both drawability and ductility. In other words, when the temperature of the lubricating liquid is lowered to 30 ° C. or lower, the extreme pressure film formation reaction on the surface of the brass-plated steel wire or the die is suppressed, the drawability of the brass-plated steel wire is lowered, and the brass having excellent ductility It was found that plated steel wire could not be produced.

実施例6では、ZnDTP及びポリオキシエチレン−アルキルエーテルをそれぞれ1.0重量%含有させた潤滑液を用いた。実施例6では、伸線性、延性ともに悪かった。これは、ZnDTPの過剰のために、潤滑液のエマルジョン径が大きくなり(いわゆるエマルジョン径の粗大化)、ダイスへの引き込みが悪くなって、潤滑性が悪化したことが原因であると考えられる。   In Example 6, a lubricating liquid containing 1.0% by weight of ZnDTP and polyoxyethylene-alkyl ether was used. In Example 6, both drawability and ductility were poor. This is considered to be caused by the fact that the emulsion diameter of the lubricating liquid becomes large (so-called coarsening of the emulsion diameter) due to the excess of ZnDTP, the pulling into the die deteriorates, and the lubricity deteriorates.

実施例7;8では、実施例1と比較して下流設定温度をさらに低くした。下流設定温度を15℃とした実施例7では、実施例1と同じように、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できた。一方、下流設定温度を10℃とした実施例8では、伸線性及び延性ともに低下した。以上から、潤滑液の温度は15℃以上が好ましいことが判明した。   In Examples 7 and 8, the downstream set temperature was further lowered as compared with Example 1. In Example 7 in which the downstream set temperature was 15 ° C., as in Example 1, a brass-plated steel wire excellent in drawability and ductility could be produced. On the other hand, in Example 8 which set downstream setting temperature to 10 degreeC, both wire drawing property and ductility fell. From the above, it was found that the temperature of the lubricating liquid is preferably 15 ° C. or higher.

以上の実施例から、最良の形態のように、潤滑液として、ZnDTPを0.5重量%及びポリオキシエチレン−アルキルエーテルを0.5重量%含有したものを用い、かつ、ブラスめっきスチールワイヤ17を引張り強さ2500MPaを超える引張り強さで伸線処理する下流潤滑液槽10B内の下流潤滑液16の温度、即ち、下流設定温度を15℃以上30℃以下にし、上流設定温度を30℃以上とすることが好ましいことがわかった。即ち、2500MPaを超える引張り強さで伸線処理する下流潤滑液槽10Bではブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成が抑制されやすい。このため、下流潤滑液槽10B内の下流潤滑液16にZnDTPを添加し、さらに、下流潤滑液16を冷却することによって、ブラスめっきスチールワイヤの温度上昇を抑制するとともに、ブラスめっきスチールワイヤやダイスの表面の極圧皮膜生成反応の低下を抑制でき、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できた。また、実施例1;7からわかるように、下流設定温度を15℃以上20℃以下とすれば、さらに好ましいことがわかった。   From the above examples, as in the best mode, a lubricant containing 0.5% by weight of ZnDTP and 0.5% by weight of polyoxyethylene-alkyl ether was used, and brass-plated steel wire 17 was used. The temperature of the downstream lubricating liquid 16 in the downstream lubricating liquid tank 10B that is drawn at a tensile strength exceeding 2500 MPa, that is, the downstream set temperature is set to 15 ° C. or higher and 30 ° C. or lower, and the upstream set temperature is set to 30 ° C. or higher. It turned out that it is preferable. That is, in the downstream lubricating liquid tank 10B in which the drawing process is performed with a tensile strength exceeding 2500 MPa, the formation of an extreme pressure film on the surface of the brass-plated steel wire or the die is easily suppressed. For this reason, by adding ZnDTP to the downstream lubricating liquid 16 in the downstream lubricating liquid tank 10B and further cooling the downstream lubricating liquid 16, the temperature increase of the brass plated steel wire is suppressed, and the brass plated steel wire or die As a result, it was possible to suppress a decrease in the reaction of forming an extreme pressure film on the surface of the steel plate and to manufacture a brass-plated steel wire excellent in wire drawing and ductility. Further, as can be seen from Examples 1 and 7, it was found that it is more preferable that the downstream set temperature is 15 ° C. or higher and 20 ° C. or lower.

極圧皮膜生成反応の低下を抑制する成分として、ZnDTP以外に、硫化オレフィン、塩素化パラフィン、ナフテン酸塩などを用いてもよい。
最良の形態では、潤滑液槽が上流潤滑液槽10Aと下流潤滑液槽10Bとに区画された伸線装置1を例示したが、1つの潤滑液槽に複数のダイス及び最終ダイスを設けて伸線加工する伸線装置の場合は、当該1つの潤滑液槽に満たす潤滑液として、ZnDTPを0.5重量%及びポリオキシエチレン−アルキルエーテルを0.5重量%含有した潤滑液を用い、当該潤滑液の温度を15℃以上30℃以下に設定することによって、伸線性及び延性に優れたブラスめっきスチールワイヤを製造できると考えられる。
In addition to ZnDTP, sulfurized olefin, chlorinated paraffin, naphthenate, and the like may be used as a component that suppresses the decrease in the extreme pressure film formation reaction.
In the best mode, the wire drawing device 1 in which the lubricating liquid tank is divided into the upstream lubricating liquid tank 10A and the downstream lubricating liquid tank 10B is illustrated, but a plurality of dies and a final die are provided in one lubricating liquid tank. In the case of a wire drawing device for wire processing, as a lubricating liquid filling the one lubricating liquid tank, a lubricating liquid containing 0.5% by weight of ZnDTP and 0.5% by weight of polyoxyethylene-alkyl ether is used. By setting the temperature of the lubricating liquid to 15 ° C. or more and 30 ° C. or less, it is considered that a brass-plated steel wire excellent in wire drawing and ductility can be produced.

ブラスめっきスチールワイヤの伸線方法に用いる伸線装置を示す図(最良の形態)。The figure which shows the wire drawing apparatus used for the drawing method of a brass plating steel wire (best form). 実施例及び従来例の条件と実施例及び従来例により製造されたブラスめっきスチールワイヤの伸線加工評価結果を示す図(最良の形態)。The figure (best form) which shows the conditions of an Example and a prior art example, and the wire drawing process evaluation result of the brass plating steel wire manufactured by the Example and the prior art example.

符号の説明Explanation of symbols

1 伸線装置、10 伸線機、10A 上流潤滑液槽、10B 下流潤滑液槽、
15 上流潤滑液、16 下流潤滑液、20 潤滑液タンク、30 冷却槽。
1 wire drawing device, 10 wire drawing machine, 10A upstream lubricating liquid tank, 10B downstream lubricating liquid tank,
15 upstream lubricating liquid, 16 downstream lubricating liquid, 20 lubricating liquid tank, 30 cooling tank.

Claims (7)

油成分と極圧成分とを含んだ潤滑液を用いてブラスめっきスチールワイヤを伸線するブラスめっきスチールワイヤの伸線方法において、最終ダイスが設置された下流潤滑液槽と複数のダイスが設置された上流潤滑液槽とを備えた伸線装置を用い、下流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、温度15℃以上30℃以下の潤滑液を用いたことを特徴とするブラスめっきスチールワイヤの伸線方法。   In the brass plating steel wire drawing method, which draws the brass plating steel wire using a lubricating liquid containing an oil component and an extreme pressure component, a downstream lubricating liquid tank in which the final die is installed and a plurality of dies are installed. Using a wire drawing device provided with an upstream lubricating liquid tank, and containing a component that suppresses a decrease in the extreme pressure film formation reaction as a lubricating liquid in the downstream lubricating liquid tank, and having a temperature of 15 ° C. or higher and 30 ° C. or lower. A method of drawing brass-plated steel wire, characterized by using a lubricating liquid. 20℃以下の潤滑液を用いたことを特徴とする請求項に記載のブラスめっきスチールワイヤの伸線方法。 The method of drawing a brass-plated steel wire according to claim 1 , wherein a lubricating liquid of 20 ° C or lower is used. 上流潤滑液槽内の潤滑液として、極圧皮膜生成反応の低下を抑制する成分を含有し、かつ、温度30℃以上の潤滑液を用いたことを特徴とする請求項又は請求項に記載のブラスめっきスチールワイヤの伸線方法。 As a lubricating fluid in the upstream lubricating liquid tank, electrode containing component to suppress decrease in圧皮film formation reaction, and, to claim 1 or claim 2 characterized by using the temperature 30 ° C. or more lubricant The drawing method of the described brass plating steel wire. 極圧皮膜生成反応の低下を抑制する成分が、ZnDTPであることを特徴とする請求項1乃至請求項のいずれかに記載のブラスめっきスチールワイヤの伸線方法。 The method for drawing a brass-plated steel wire according to any one of claims 1 to 3 , wherein the component that suppresses the decrease in the extreme pressure film formation reaction is ZnDTP. 潤滑液が、界面活性剤としてポリオキシエチレン−アルキルエーテルを含有することを特徴とする請求項に記載のブラスめっきスチールワイヤの伸線方法。 The method for drawing a brass-plated steel wire according to claim 4 , wherein the lubricating liquid contains polyoxyethylene-alkyl ether as a surfactant. 潤滑液が、ZnDTPとポリオキシエチレン−アルキルエーテルとをそれぞれ0.5重量%含有することを特徴とする請求項に記載のブラスめっきスチールワイヤの伸線方法。 The method of drawing a brass-plated steel wire according to claim 5 , wherein the lubricating liquid contains 0.5% by weight of ZnDTP and polyoxyethylene-alkyl ether, respectively. ブラスめっきスチールワイヤが下流潤滑液槽において引張り強さ2500MPaを超える引張り強さで伸線処理されることを特徴とする請求項乃至請求項のいずれかに記載のブラスめっきスチールワイヤの伸線方法。 Brass plated steel wire drawing according to any one of claims 1 to 6 brass plated steel wire is characterized in that it is drawing processed in tensile strength greater than the strength 2500MPa tensile downstream lubricant tank Method.
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