JPH10183160A - Lubricant composition for high-temperature metal working and tube punching using the same - Google Patents
Lubricant composition for high-temperature metal working and tube punching using the sameInfo
- Publication number
- JPH10183160A JPH10183160A JP34548396A JP34548396A JPH10183160A JP H10183160 A JPH10183160 A JP H10183160A JP 34548396 A JP34548396 A JP 34548396A JP 34548396 A JP34548396 A JP 34548396A JP H10183160 A JPH10183160 A JP H10183160A
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- JP
- Japan
- Prior art keywords
- mandrel bar
- lubricant
- lubricant composition
- metal working
- temperature
- Prior art date
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- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炭素鋼や低合金
鋼、さらには高合金鋼やステンレス鋼などの金属材料を
高温で加工する場合、特にエルハルト−プッシュベンチ
法と称されるいわゆる押し抜き製管方法に用いて好適な
高温金属加工用潤滑剤組成物と、この潤滑剤組成物を用
いた押し抜き製管方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called punching method called an Erhard-push bench method, particularly when a metal material such as carbon steel, low alloy steel, high alloy steel or stainless steel is processed at a high temperature. The present invention relates to a high-temperature metal working lubricant composition suitable for use in a pipe making method, and a punching pipe making method using the lubricant composition.
【０００２】[0002]
【従来の技術】上記のエルハルト−プッシュベンチ法に
よる押し抜き製管方法は、基本的に次の〜の工程を
とる製管方法である。2. Description of the Related Art The above-described punching pipe making method by the Erhard-push bench method is a pipe making method which basically takes the following steps (1) to (4).
【０００３】 高温に加熱された角柱状または円柱状
の鋼片を、コンテナとマンドレルを備える縦型水圧プレ
スにより穿孔して横断面形状が円形の底付き中空素管
（以下、単に「底付き素管」という）に成形する。 底付き素管を所定の温度に加熱する。 １または複数枚の孔ダイスとマンドレルバーを備え
る横型水圧プレスの高温に加熱されたマンドレルバーに
底付き素管を外挿し、マンドレルバーとともに底付き素
管をダイス孔に押し込み挿通してその外径と肉厚を減ず
る。 押し抜き終了後の底付き管からマンドレルバーを抜
き採り、しかる後に底部を切断除去する。[0003] A prismatic or cylindrical steel slab heated to a high temperature is perforated by a vertical hydraulic press equipped with a container and a mandrel to form a hollow shell with a circular cross section (hereinafter simply referred to as a "bottomed element"). Tube "). The bottomed tube is heated to a predetermined temperature. The bottomed tube is extrapolated into a mandrel bar heated to a high temperature of a horizontal hydraulic press equipped with one or more hole dies and a mandrel bar, and the bottomed tube is pushed into the die hole together with the mandrel bar, and its outer diameter is inserted. And reduce the thickness. The mandrel bar is withdrawn from the bottomed tube after the end of the punching, and then the bottom is cut off.
【０００４】上記の工程では、押し抜き加工中の底付
き素管および縮径減肉後の底付き管とマンドレルバーと
が焼付きを起こさないように、潤滑剤が用いられる。[0004] In the above process, a lubricant is used to prevent seizure of the mandrel bar and the bottomed tube during the punching process and the bottomed tube after the thickness reduction.
【０００５】また、マンドレルバーは、押し抜き加工中
の底付き素管および押し抜き終了後の底付き素管の熱を
過大に抜熱してその加工性を低下させない一方、押し抜
き終了後の管冷却時に底付き管の収縮代が過大になりす
ぎて底付き管がマンドレルバーに対して焼きばめ状態に
ならないようにするために、予め高温（通常、６００〜
８００℃）に加熱される。Further, the mandrel bar does not excessively remove the heat of the bottomed tube during the punching process and the bottomed tube after the completion of the punching to reduce the workability, while the tube after the completion of the punching. In order to prevent the bottomed tube from shrinking excessively during cooling so that the bottomed tube does not shrink to the mandrel bar, a high temperature (usually 600 to
800 ° C.).
【０００６】そして、従来は、上記潤滑剤として黒鉛や
粉末ガラス、さらには硼砂や塩などの固体潤滑剤を用
い、上記の工程では次の２つのうちのいずれ一方の方
法によって潤滑処理することとしていた。Conventionally, graphite or powdered glass, or a solid lubricant such as borax or salt is used as the lubricant, and in the above process, lubrication is performed by one of the following two methods. Was.
【０００７】すなわち、その１つは、所定の温度に加熱
された底付き素管の開口部からその内部に向けて固体潤
滑剤、具体的には黒鉛粉末のみを人手などにより投入
し、しかる後に底付き素管を予め高温に加熱されたマン
ドレルバーに外挿する方法。他の１つは、予め高温に加
熱されたマンドレルバーの表面に、固体潤滑剤を分散
剤、消泡剤および増粘剤などの第三成分とともに水と混
合してスプレー塗布し、しかる後に所定の温度に加熱さ
れた底付き素管をマンドレルバーに外挿する方法。[0007] That is, one of them is that a solid lubricant, specifically graphite powder alone, is manually injected from the opening of the bottomed tube heated to a predetermined temperature toward the inside thereof, and thereafter, A method of extrapolating a base tube with a mandrel bar heated to a high temperature in advance. The other one is that a solid lubricant is mixed with water together with a third component such as a dispersant, an antifoaming agent and a thickener and spray-coated on the surface of a mandrel bar that has been heated to a high temperature in advance, and then a predetermined amount is applied. A method of extrapolating a bottomed tube heated to the above temperature to a mandrel bar.
【０００８】 [0008]
【発明が解決しようとする課題】しかし、上記潤滑処理
方法のうち、前者の方法は、投入した固体潤滑剤が偏り
やすいのみならず、固体潤滑剤を底付き素管の内奥部ま
で投入することが極めて困難で、底付き素管の全内表面
にわたって均一厚さの潤滑皮膜を形成させることができ
ない。また、後者の方法は、高温のマンドレルバーへの
スプレー塗布と同時に溶媒の水が蒸気となって飛散し、
この蒸気飛散とともに固定潤滑剤自体も飛散するために
マンドレルバー表面に固体潤滑剤がほとんど付着するこ
とがない。この結果、いずれの場合も潤滑不良を起こし
て押し抜き終了後の底付き管とマンドレルバーとが焼き
付き、押し抜き終了後の底付き管からマンドレルバーを
引き抜けなくなることが多々あった。However, of the above-mentioned lubrication treatment methods, the former method not only causes the injected solid lubricant to be easily biased but also introduces the solid lubricant to the inner part of the bottomed tube. It is extremely difficult to form a lubricating film having a uniform thickness over the entire inner surface of the bottom tube. In the latter method, the water of the solvent is vaporized and scattered at the same time as the spray application to the high-temperature mandrel bar,
Since the fixed lubricant itself is also scattered together with the scattered steam, the solid lubricant hardly adheres to the surface of the mandrel bar. As a result, in any case, poor lubrication occurs, and the bottomed tube and the mandrel bar after the end of the punching are seized, and the mandrel bar cannot be pulled out from the bottomed tube after the end of the punching in many cases.
【０００９】勿論、後者の方法においては、スプレー塗
布時間を長くするか、もしくは単位時間当たりの潤滑剤
供給量を増やす、換言すればマンドレルバーの温度低下
を許容する場合には、固体潤滑剤の付着量を増やすこと
が可能である。しかし、この場合には、マンドレルバー
の温度低下に伴って底付き素管の温度が低下し、加工性
低下による押し抜き力の上昇を招き、著しい場合は押し
抜き自体が不可能になる。また、押し抜き終了後の底付
き管、特に底付き管が大径薄肉の場合、底付き管からマ
ンドレルバーを引き抜き除去できなくなることが多くな
る。さらに、マンドレルバーを引き抜くことはできて
も、大きな引き抜き力が必要で、管端部が座屈変形して
該部が製品とならず材料歩留まりが低下する。また更
に、多量の固体潤滑剤が無駄になるのに加え、その排水
処理に費用が嵩むなどして製品の製造コスト上昇の原因
になる。従って、このような方法は採用し難い。Of course, in the latter method, if the spray application time is lengthened or the lubricant supply amount per unit time is increased, in other words, if the temperature of the mandrel bar is allowed to decrease, the solid lubricant must be used. It is possible to increase the amount of adhesion. However, in this case, as the temperature of the mandrel bar decreases, the temperature of the base tube decreases, leading to an increase in the punching force due to a reduction in workability. In a significant case, the punching itself becomes impossible. In addition, when the bottomed tube after the end of the punching, particularly the bottomed tube has a large diameter and a thin wall, the mandrel bar cannot often be pulled out and removed from the bottomed tube. Further, even if the mandrel bar can be pulled out, a large pulling force is required, and the tube end is buckled and deformed, so that the portion does not become a product and the material yield is reduced. In addition, a large amount of solid lubricant is wasted, and the cost of wastewater treatment increases, which causes an increase in product manufacturing costs. Therefore, such a method is difficult to adopt.
【００１０】このため、６００℃以上というような高温
のマンドレルバー表面に確実に付着し、しかも優れた潤
滑性を発揮する潤滑剤組成物の開発が望まれていた。[0010] Therefore, it has been desired to develop a lubricant composition which surely adheres to the surface of a mandrel bar at a high temperature of 600 ° C. or higher and exhibits excellent lubricity.
【００１１】本発明は、上記の実状に鑑みてなされたも
ので、その課題は、水を溶媒としてスプレー塗布した際
に６００℃以上というような高温のマンドレルバー表面
に確実に付着し、しかも優れた潤滑性を発揮する高温金
属加工用潤滑剤組成物と、この潤滑剤組成物を用いた押
し抜き製管方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the problem that when sprayed with water as a solvent, it is reliably adhered to the surface of a mandrel bar at a high temperature of 600 ° C. or higher. It is an object of the present invention to provide a lubricating composition for high-temperature metal working exhibiting improved lubricating properties, and a method for making a tube by using the lubricant composition.
【００１２】[0012]
【課題を解決するための手段】本発明の要旨は、下記
（１）の高温金属加工用潤滑剤組成物、（２）の高温金
属加工用潤滑剤、および（３）の押し抜き製管方法にあ
る。SUMMARY OF THE INVENTION The gist of the present invention is to provide a lubricant composition for high-temperature metal working of (1), a lubricant for high-temperature metal working of (2), and a punching pipe forming method of (3). It is in.
【００１３】（１）黒鉛１００重量部、モリブデン酸塩
１〜５０重量部および珪酸塩１〜５０重量部からなるこ
とを特徴とする高温金属加工用潤滑剤組成物。(1) A lubricant composition for high-temperature metal working comprising 100 parts by weight of graphite, 1 to 50 parts by weight of a molybdate and 1 to 50 parts by weight of a silicate.
【００１４】（２）重量割合で、上記（１）に記載の高
温金属加工用潤滑剤組成物を１０〜７０％含み、残部が
実質的に水からなることを特徴とする高温金属加工用潤
滑剤。(2) A lubricating material for high-temperature metal working comprising 10 to 70% by weight of the lubricant composition for high-temperature metal working described in (1) above, and the balance substantially consisting of water. Agent.
【００１５】（３）上記（２）の高温金属加工用潤滑剤
を、温度が６００℃以上のマンドレルバー表面に塗布し
た後、このマンドレルバーに所定の温度に加熱された底
付き中空素管を外挿し、しかる後に底付き中空素管をマ
ンドレルバーとともに孔ダイスの孔に押し込むことを特
徴とする押し抜き製管方法。(3) After applying the high temperature metal working lubricant of the above (2) to the surface of the mandrel bar having a temperature of 600 ° C. or higher, a hollow shell with a bottom heated to a predetermined temperature is applied to the mandrel bar. A method of making a tube by punching, which comprises extrapolating, and thereafter, pushing the hollow shell with the bottom together with the mandrel bar into the hole of the hole die.
【００１６】本発明者は、多くの実験を行った結果次の
ことを知見し、本発明をなすに到った。The inventor of the present invention has found out the following as a result of many experiments, and has accomplished the present invention.
【００１７】すなわち、前述したように、押し抜き製管
方法における横型水圧プレスでは、６００℃以上の温度
に加熱されたマンドレルバーに対して潤滑剤を塗布する
のが最も合理的である。そして、そのための潤滑剤組成
物としては、水を溶媒としてスプレー塗布した際にマン
ドレルバー表面に確実に付着し、しかも優れた潤滑性を
発揮するものであることが必要である。That is, as described above, in the horizontal hydraulic press in the punching and tube making method, it is most reasonable to apply a lubricant to the mandrel bar heated to a temperature of 600 ° C. or higher. It is necessary that the lubricant composition for this purpose surely adheres to the surface of the mandrel bar when spray-coated with water as a solvent, and exhibits excellent lubricity.
【００１８】そこで、黒鉛、モリブデン酸塩、および珪
酸塩を必須成分とし、この３成分を上記（１）に記載の
範囲内で配合した潤滑剤組成物と水とを上記（２）の割
合で混合して６００℃以上のマンドレルバー表面にスプ
レー塗布すると、溶媒の水は瞬時に蒸発するものの、マ
ンドレルバー表面に必要な潤滑皮膜のみが均一厚さで形
成され、この潤滑皮膜が押し抜き加工時に円滑な潤滑性
を発揮して内表面品質の良好な継目無鋼管が得られるこ
とを知見した。Therefore, graphite, molybdate and silicate are essential components, and a lubricant composition containing these three components in the range described in the above (1) and water are mixed in the ratio of the above (2). When mixed and spray-applied on a mandrel bar surface at 600 ° C or higher, although the solvent water evaporates instantaneously, only the required lubricating film is formed on the mandrel bar surface with a uniform thickness. It has been found that a seamless steel pipe exhibiting smooth lubrication and having good inner surface quality can be obtained.
【００１９】[0019]
【発明の実施の形態】以下、本発明を詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
【００２０】本発明の潤滑剤組成物を構成する主材の黒
鉛は、底付き素管とマンドレルバー間の摩擦係数の低減
をもたらす役目を担う。この黒鉛は、天然品もしくは合
成品のいずれであってもよく、少なくともその純度が７
０％以上であり、平均粒径が１００μｍ以下のものを用
いるのが好ましい。The main component graphite constituting the lubricant composition of the present invention has a role of reducing the friction coefficient between the base tube and the mandrel bar. This graphite may be either a natural product or a synthetic product, and has at least a purity of 7%.
It is preferable to use those having an average particle size of 0% or more and 100 μm or less.
【００２１】そして、本発明においては、モリブデン酸
塩と珪酸塩とは必須成分であり、一方のみでは所望の効
果が得られない。すなわち、モリブデン酸塩は、高温
（６００℃以上）で溶融状態となり、主材の黒鉛をマン
ドレルバーの表面に止着させる役目を担うとともに、主
材の黒鉛と同様に、それ自体摩擦係数の低減をもたらす
役目をも担う。一方、珪酸塩は、高温のマンドレルバー
表面へのスプレー塗布時の初期に主材の黒鉛と助材のモ
リブデン酸塩とをマンドレルバー表面に効果的に止着さ
せる役目を担う。In the present invention, molybdate and silicate are essential components, and a desired effect cannot be obtained by using only one of them. That is, the molybdate is in a molten state at a high temperature (600 ° C. or higher), and serves to fix the graphite of the main material to the surface of the mandrel bar, and also reduces the friction coefficient itself as in the case of the graphite of the main material. Also plays the role of bringing. On the other hand, the silicate plays a role of effectively adhering the graphite as the main material and the molybdate as the auxiliary material to the surface of the mandrel bar at the initial stage of spray application to the surface of the mandrel bar at a high temperature.
【００２２】上記のモリブデン酸塩は、マンドレルバー
の温度低下を防ぐ観点から水分を極力抑える必要がある
ため、水に対する溶解度の高いものが望ましく、Ｎａ
塩、Ｋ塩、アミン塩、アンモニウム塩などを挙げること
ができ、純度が一般工業用以上のものを用いるのが好ま
しい。また、上記の珪酸塩は、モリブデン酸塩の場合と
同様の理由により、Ｎａ塩またはＫ塩のいずれかである
必要があるが、その純度は一般工業用以上のものであれ
ばよい。The above molybdate must have as low a water content as possible from the viewpoint of preventing the temperature of the mandrel bar from lowering.
Salts, K salts, amine salts, ammonium salts and the like can be mentioned, and it is preferable to use those having a purity higher than that of general industrial use. Further, the above silicate must be either Na salt or K salt for the same reason as in the case of molybdate, but its purity may be higher than that for general industrial use.
【００２３】本発明の潤滑剤組成物は、上記の黒鉛、モ
リブデン酸塩および珪酸塩からなっており、この三成分
が一体となって高温のマンドレルバーへのスプレー塗布
で確実に付着して均一厚さの潤滑皮膜を形成し、押し抜
き加工時に優れた潤滑性を発揮する。The lubricant composition of the present invention comprises the above-mentioned graphite, molybdate and silicate. The three components are integrally adhered by spray application to a high-temperature mandrel bar and uniformly adhered. It forms a thick lubricating film and exhibits excellent lubricity during punching.
【００２４】しかし、モリブデン酸塩の配合量が黒鉛１
００重量部に対して１重量部未満であると、主材の黒鉛
のマンドレルバー表面への止着効果が得られない。逆
に、その配合量が黒鉛１００重量部に対して５０重量部
を超えると、主材の黒鉛の潤滑効果を阻害し、潤滑皮膜
の潤滑性が著しく低下する。However, if the amount of molybdate is one of graphite 1
If the amount is less than 1 part by weight with respect to 00 parts by weight, the effect of fixing graphite as the main material to the surface of the mandrel bar cannot be obtained. Conversely, if the compounding amount exceeds 50 parts by weight with respect to 100 parts by weight of graphite, the lubricating effect of the main material graphite is impaired, and the lubricity of the lubricating film is significantly reduced.
【００２５】また、珪酸塩の配合量が黒鉛１００重量部
に対して１重量部未満であると、高温のマンドレルバー
へのスプレー塗布時の初期における止着効果が得られな
い。逆に、その配合量が黒鉛１００重量部に対して５０
重量部を超えると、上記モリブデン酸塩の場合と同様
に、主材の黒鉛の潤滑効果を阻害し、潤滑皮膜の潤滑性
が著しく低下する。If the amount of the silicate is less than 1 part by weight with respect to 100 parts by weight of the graphite, the effect of the initial fixing at the time of spray application to a high temperature mandrel bar cannot be obtained. Conversely, the content is 50 parts by weight with respect to 100 parts by weight of graphite.
When the amount is more than the weight part, the lubricating effect of graphite as a main material is hindered and the lubricity of the lubricating film is remarkably reduced as in the case of the molybdate.
【００２６】なお、黒鉛１００重量部に対するモリブデ
ン酸塩および珪酸塩の好ましい配合割合は、モリブデン
酸塩１０〜２０重量部、珪酸塩５〜１５重量部である。The preferred compounding ratio of molybdate and silicate to 100 parts by weight of graphite is 10 to 20 parts by weight of molybdate and 5 to 15 parts by weight of silicate.
【００２７】以上に説明した本発明の潤滑剤組成物は、
前述したように、底付き素管の加工性を低下させないと
ともに、押し抜き終了後底付き管がマンドレルバーに対
して焼きばめ状態にならないように６００℃以上（具体
的には６００〜８００℃程度）加熱された高温のマンド
レルバー表面に水と混合してスプレー塗布して使用され
る。The lubricant composition of the present invention described above is
As described above, not less than 600 ° C. (specifically, 600 to 800 ° C.) so that the workability of the bottomed tube is not reduced and the bottomed tube is not shrink-fitted to the mandrel bar after the end of punching. Degree) It is mixed with water on the surface of the heated high-temperature mandrel bar and spray-coated for use.
【００２８】この時、上記本発明の潤滑剤組成物の混合
比が、重量割合で１０％未満であると、水が多すぎるた
めに水の飛散現象が極めて著しくなり、所望の潤滑皮膜
が形成されないのみならず、マンドレルバーの温度が著
しく低下し、押し抜き力が上昇するとともに押し抜き終
了後の底付き管からマンドレルバーを引き抜けなくな
る。逆に、その混合比が７０％を超えると、粘性が高く
なり過ぎるためにスプレー塗布することができなくな
る。よって、スプレー塗布使用時には、本発明の潤滑剤
組成物の混合比が、重量割合で１０〜７０％であり、残
部が実質的に水である潤滑剤とする必要がある。At this time, if the mixing ratio of the above-mentioned lubricant composition of the present invention is less than 10% by weight, the amount of water is too large, so that the phenomenon of water scattering becomes extremely remarkable, and a desired lubricating film is formed. In addition, the temperature of the mandrel bar is significantly reduced, the pushing force is increased, and the mandrel bar cannot be pulled out from the bottomed tube after the completion of the pushing. Conversely, if the mixing ratio exceeds 70%, the viscosity becomes too high and spray coating cannot be performed. Therefore, when using spray coating, the lubricant composition of the present invention needs to be a lubricant whose mixing ratio is 10 to 70% by weight and the balance is substantially water.
【００２９】上記のようにして、高温のマンドレルバー
に本発明の潤滑剤をスプレー塗布する場合には、水分は
瞬時に蒸発して飛散するが、マンドレルバー表面には均
一厚さの黒鉛を主成分とする乾燥固形潤滑皮膜が形成さ
れる。この結果、このマンドレルバーに底付き素管を外
挿して孔ダイスを押し抜くと、焼き付きのない円滑な加
工が行われ、内表面品質の良好な製品が得られる。ま
た、焼き付きが発生しないのに加え、マンドレルバー温
度の低下が少ないので、押し抜き終了後の底付き管から
マンドレルバーを容易に引き抜くことができる。When the lubricant of the present invention is spray-applied to a high-temperature mandrel bar as described above, the water evaporates instantaneously and scatters, but the mandrel bar surface mainly comprises graphite having a uniform thickness. A dry solid lubricating film as a component is formed. As a result, when the base tube with the bottom is inserted into the mandrel bar and the hole die is pushed out, smooth processing without seizure is performed and a product having good inner surface quality is obtained. In addition, since the seizure does not occur and the temperature of the mandrel bar does not decrease much, the mandrel bar can be easily pulled out from the bottomed tube after the end of the punching.
【００３０】なお、本発明の潤滑剤組成物を水と混合す
る場合には、主材の黒鉛と珪酸塩との分散性および貯蔵
性を保持させるために、この種の潤滑剤に通常用いられ
る分散剤や増粘剤さらには消泡剤などの第三成分を添加
するのが好ましい。When the lubricant composition of the present invention is mixed with water, it is usually used in this type of lubricant in order to maintain the dispersibility and storability of the main material graphite and silicate. It is preferable to add a third component such as a dispersant, a thickener and an antifoaming agent.
【００３１】上記の分散剤としては、例えば、ポリアク
リル酸などのアクリル系重合体または共重合体、酢酸ビ
ニル系重合体または共重合体、エチレン系重合体または
共重合体、無水マレイン酸系重合体、スチレン系重合
体、ＣＭＣなどの多糖類やスルホン酸塩などが挙げられ
る。そして、これらの分散剤は、これを単独で添加する
場合には、黒鉛１００重量部に対して１０重量部以下で
あれば添加しても何ら問題ない。Examples of the above dispersant include acrylic polymers or copolymers such as polyacrylic acid, vinyl acetate polymers or copolymers, ethylene polymers or copolymers, and maleic anhydride polymer. And polysaccharides such as CMC, styrene-based polymers and CMC, and sulfonates. When these dispersants are added alone, there is no problem if they are added at 10 parts by weight or less based on 100 parts by weight of graphite.
【００３２】増粘剤としては、例えば、カルボキシルメ
チルセルロースなどが挙げられる。そして、これらの増
粘剤は、これを単独で添加する場合には、上記の分散剤
と同様に、黒鉛１００重量部に対して１０重量部以下で
あれば、添加しても何ら問題ない。[0032] Examples of the thickener include carboxymethyl cellulose. When these thickeners are added alone, as in the case of the above-mentioned dispersants, there is no problem if they are added at 10 parts by weight or less based on 100 parts by weight of graphite.
【００３３】上記の消泡剤としては、例えば、ジメチル
シリコーン、メチルフェニルシリコーンなどのシリコー
ンオイルなどを挙げることができる。そして、これらの
消泡剤は、これを単独で添加する場合には、上記の分散
剤および増粘剤と同様に、黒鉛１００重量部に対して１
０重量部以下であれば、添加しても何ら問題ない。Examples of the defoaming agent include silicone oils such as dimethyl silicone and methyl phenyl silicone. When these antifoaming agents are added alone, they are added to 100 parts by weight of graphite in the same manner as the above dispersants and thickeners.
If it is 0 part by weight or less, there is no problem even if it is added.
【００３４】上記の分散剤、増粘剤および消泡剤は、こ
れらを２種以上複合して添加する場合の合計配合量は、
黒鉛１００重量部に対して１０重量部以下とするのが好
ましい。When two or more of the above-mentioned dispersants, thickeners and defoamers are added in combination, the total amount is as follows:
It is preferable that the content be 10 parts by weight or less based on 100 parts by weight of graphite.
【００３５】なお、上記のモリブデン酸塩は、極めて毒
性の低い卓越した水溶性の防錆剤である。従って、本発
明の潤滑剤組成物は、これを水と混合して使用する場合
の鋼製貯蔵容器やスプレー装置を構成する鋼製配管部材
などに防錆処理を施す必要がないのに加え、第三成分と
しての防錆剤の添加を省略し得るという付加的な効果を
も有している。The above molybdate is an excellent water-soluble rust inhibitor with extremely low toxicity. Therefore, the lubricant composition of the present invention is not required to be subjected to a rust-preventive treatment on a steel storage container or a steel piping member constituting a spraying device when it is used by mixing it with water, It also has an additional effect that the addition of a rust inhibitor as a third component can be omitted.
【００３６】[0036]
【実施例】各成分の配合比および水との混合比を種々変
えた表１に示す１９種類の潤滑剤を準備した。また、参
考のために黒鉛粉末のみからなる潤滑剤も準備した。EXAMPLES Nineteen kinds of lubricants shown in Table 1 were prepared in which the mixing ratio of each component and the mixing ratio with water were variously changed. Also, a lubricant consisting of graphite powder alone was also prepared for reference.
【００３７】[0037]
【表１】 [Table 1]
【００３８】これらの潤滑剤を、使用に先だってその都
度７００℃に加熱された外径２８５ｍｍのマンドレルバ
ー表面に０．５リットル／分・ｍ2 の一定条件のもとに
スプレー塗布してその表面に潤滑皮膜を形成させ、外径
３８５ｍｍ、肉厚３５ｍｍ、長さ５１８５ｍｍのＳＵＳ
３０４製の底付き素管から外径３５５ｍｍ、肉厚２５ｍ
ｍ、長さ７７００ｍｍの製品管に成形する押し抜き加工
に供した。Prior to use, these lubricants were spray-coated on a surface of a 285 mm outer diameter mandrel bar heated to 700 ° C. each time under a constant condition of 0.5 l / min · m 2 and sprayed on the surface. SUS with outer diameter of 385mm, wall thickness of 35mm and length of 5185mm
Outer diameter 355mm, wall thickness 25m from 304 base tube
m, and subjected to a punching process for forming into a product tube having a length of 7700 mm.
【００３９】なお、参考までに準備した黒鉛粉末のみか
らなる潤滑剤は、底付き素管の内部に人手により６ｋｇ
投入使用した。The lubricant consisting of only graphite powder prepared for reference was manually placed in a bottomed tube at 6 kg.
Used.
【００４０】そして、押し抜き加工後に１０００℃まで
冷却された底付き管からマンドレルバーを引き抜くのに
要した引き抜き力と、マンドレルバー引き抜き後におけ
る管内面品質とを調べた。その結果を、表１に併記して
示した。Then, the pulling force required to pull out the mandrel bar from the bottomed tube cooled to 1000 ° C. after the punching process, and the inner surface quality of the tube after pulling out the mandrel bar were examined. The results are shown in Table 1.
【００４１】なお、マンドレルバーの引き抜き力および
管内面品質の評価は、いずれも実施例のNo. ２の結果を
１とした場合における比で示した。また、管内面品質
は、焼き付き疵のみを評価対象とした。The pulling force of the mandrel bar and the evaluation of the quality of the inner surface of the tube were all shown as ratios when the result of No. 2 of the example was set to 1. In addition, the inner surface quality of the pipe was evaluated only for burn-in flaws.
【００４２】表１に示す結果から明らかなように、本発
明の潤滑剤組成物を本発明で規定する割合で水と混合し
た潤滑剤を用いた場合（No. １〜１２）では、マンドレ
ルバーの引き抜き力の評価指数、および内面品質の評価
指数がともに１．５以下と小さく、良好であった。As is clear from the results shown in Table 1, when the lubricant composition of the present invention was mixed with water at the ratio specified in the present invention (Nos. 1 to 12), the mandrel bar was used. Both the evaluation index of the drawing force and the evaluation index of the inner surface quality were as small as 1.5 or less, which was good.
【００４３】これに対し、水との混合比は本発明で規定
する範囲内であるが、潤滑剤組成物を構成するモリブデ
ン酸塩または珪酸塩のいずれか一方の配合量が本発明の
範囲外である潤滑剤を用いた場合（No. １３〜１６）で
は、マンドレルバーの引き抜き力の評価指数、および内
面品質の評価指数がともにも１．８以上と大きく、不芳
であった。On the other hand, the mixing ratio with water is within the range specified in the present invention, but the amount of either the molybdate or the silicate constituting the lubricant composition is out of the range of the present invention. In the case of using the lubricant (No. 13 to 16), both the evaluation index of the pulling force of the mandrel bar and the evaluation index of the inner surface quality were as large as 1.8 or more, which was unsatisfactory.
【００４４】また、潤滑剤組成物自体は本発明で規定す
る潤滑剤組成物であるが、水との混合比が本発明で規定
する範囲外である潤滑剤を用いた場合（No. １７、１
８）では、マンドレルバーの引き抜き力の評価指数が
２．３以上、内面品質の評価指数が２．２以上でさらに
大きく、極めて不芳であった。The lubricant composition itself is the lubricant composition specified in the present invention, but when a lubricant whose mixing ratio with water is outside the range specified in the present invention is used (No. 17, 1
In 8), the evaluation index of the pulling-out force of the mandrel bar was 2.3 or more, and the evaluation index of the inner surface quality was 2.2 or more, which was even larger and extremely unpleasant.
【００４５】さらに、黒鉛のみを、多量の分散剤、増粘
剤および消泡剤とともに水と混合した従来の潤滑剤を用
いた場合（No. １９）、および黒鉛粉末のみを底付き素
管の内部に投入した場合（No. ２０）では、マンドレル
バーの引き抜き力の評価指数が３．２および３．４であ
り、内面品質の評価指数も３．０および２．９と一段と
大きく、著しく不芳であった。Furthermore, when a conventional lubricant in which only graphite was mixed with water together with a large amount of a dispersant, a thickening agent and an antifoaming agent was used (No. 19), only graphite powder was used for a bottomed tube. When the mandrel bar was inserted into the inside (No. 20), the evaluation index of the pulling force of the mandrel bar was 3.2 and 3.4, and the evaluation index of the inner surface quality was 3.0 and 2.9, which were much larger and extremely poor. It was good.
【００４６】[0046]
【発明の効果】本発明の高温金属加工用潤滑剤組成物
は、６００℃以上の高温工具に対する止着性と潤滑性に
優れている。このため、この潤滑組成物を用いて押し抜
き製管する場合には、管が大径薄肉であっても、マンド
レルバーと被加工材料とが焼き付くことがないので、加
工後の管からマンドレルバーを容易に引き抜くことが可
能である。また、内面品質の優れた製品が得られる。ま
た更に、余分な潤滑剤組成物が排水中に混入することが
ないので、排水処理費の低減が図れるのみならず、環境
汚染をもたらすことがない。Industrial Applicability The lubricant composition for high temperature metal working of the present invention has excellent adhesion and lubricity to high temperature tools at 600 ° C. or higher. For this reason, when the pipe is formed by punching using this lubricating composition, the mandrel bar and the material to be processed do not seize even if the pipe has a large diameter and a thin wall. Can be easily pulled out. In addition, a product having excellent inner surface quality can be obtained. Furthermore, since the excess lubricant composition does not mix into the wastewater, not only the wastewater treatment cost can be reduced, but also no environmental pollution is caused.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ１０Ｍ 103:02 125:10 125:26） Ｃ１０Ｎ 10:02 10:12 30:06 30:08 40:24 50:02 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C10M 103: 02 125: 10 125: 26) C10N 10:02 10:12 30:06 30:08 40:24 50:02
Claims (3)
０重量部および珪酸塩１〜５０重量部とからなることを
特徴とする高温金属加工用潤滑剤組成物。1. 100 parts by weight of graphite, molybdates 1 to 5
A lubricant composition for high-temperature metal working, comprising 0 parts by weight and 1 to 50 parts by weight of a silicate.
工用潤滑剤組成物を１０〜７０％含み、残部が実質的に
水からなることを特徴とする高温金属加工用潤滑剤。2. A high-temperature metal working lubricant comprising 10 to 70% by weight of the high-temperature metal working lubricant composition according to claim 1, with the balance substantially consisting of water.
を、温度が６００℃以上のマンドレルバー表面にスプレ
ー塗布した後、このマンドレルバーに所定の温度に加熱
された底付き中空素管を外挿し、しかる後に底付き中空
素管をマンドレルバーとともに孔ダイスの孔に押し込む
ことを特徴とする押し抜き製管方法。3. The bottomed hollow shell heated to a predetermined temperature after spraying the lubricant for high temperature metal working according to claim 2 onto a surface of a mandrel bar having a temperature of 600 ° C. or higher. A hollow tube with a bottom is pressed into a hole of a hole die together with a mandrel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34548396A JPH10183160A (en) | 1996-12-25 | 1996-12-25 | Lubricant composition for high-temperature metal working and tube punching using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34548396A JPH10183160A (en) | 1996-12-25 | 1996-12-25 | Lubricant composition for high-temperature metal working and tube punching using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10183160A true JPH10183160A (en) | 1998-07-14 |
Family
ID=18376899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34548396A Pending JPH10183160A (en) | 1996-12-25 | 1996-12-25 | Lubricant composition for high-temperature metal working and tube punching using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10183160A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI679070B (en) * | 2019-04-09 | 2019-12-11 | 金允成企業股份有限公司 | Forging and drawing method for aluminum alloy pipe fittings |
-
1996
- 1996-12-25 JP JP34548396A patent/JPH10183160A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI679070B (en) * | 2019-04-09 | 2019-12-11 | 金允成企業股份有限公司 | Forging and drawing method for aluminum alloy pipe fittings |
| CN111167993A (en) * | 2019-04-09 | 2020-05-19 | 金允成企业股份有限公司 | Forging and drawing forming method for aluminum alloy pipe fitting |
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