JPH0420599A - Lubricant for hot metal working - Google Patents
Lubricant for hot metal workingInfo
- Publication number
- JPH0420599A JPH0420599A JP12579790A JP12579790A JPH0420599A JP H0420599 A JPH0420599 A JP H0420599A JP 12579790 A JP12579790 A JP 12579790A JP 12579790 A JP12579790 A JP 12579790A JP H0420599 A JPH0420599 A JP H0420599A
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- graphite
- acid
- organic carboxylic
- hot metal
- 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.)
- Granted
Links
- 239000000314 lubricant Substances 0.000 title claims abstract description 24
- 238000005555 metalworking Methods 0.000 title claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 13
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 10
- 229920001059 synthetic polymer Polymers 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 229920001577 copolymer Polymers 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000005977 Ethylene Substances 0.000 abstract description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 abstract description 2
- 150000002148 esters Chemical class 0.000 abstract description 2
- 229920001038 ethylene copolymer Polymers 0.000 abstract description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract description 2
- 229920000573 polyethylene Polymers 0.000 abstract description 2
- 229920001567 vinyl ester resin Polymers 0.000 abstract description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 abstract 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 abstract 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 abstract 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 abstract 1
- 150000001735 carboxylic acids Chemical class 0.000 abstract 1
- 239000001530 fumaric acid Substances 0.000 abstract 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 abstract 1
- 239000011976 maleic acid Substances 0.000 abstract 1
- 235000006408 oxalic acid Nutrition 0.000 abstract 1
- 239000011975 tartaric acid Substances 0.000 abstract 1
- 235000002906 tartaric acid Nutrition 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000005096 rolling process Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- -1 polyoxyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱間金属加工用潤滑剤に関するものであシ、
特にマンドレルミルにおけるシームレス鋼管の製造にお
いて、新バー又は使用途中で再研磨され熱処理スケール
の除かれたバーを使用して製管する場合等、従来困難と
されていた初期の製管作業に満足し得る潤滑性能を発揮
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a lubricant for hot metal working.
Particularly in the production of seamless steel pipes using mandrel mills, we are satisfied with the initial pipe-making work, which was previously considered difficult, such as when making pipes using a new bar or a bar that has been reground during use and has had its heat-treated scale removed. It demonstrates the lubrication performance that can be obtained.
マンドレルミルにて使用されるバーの材質、熱処理、表
面処理、面粗度等については種々の特許が出願されてい
るが、国内のマンドレルミルにっいては例えば、ＳＣｒ
材に焼入れ、焼戻しを施こしたものが多く使用されてい
る。ここで問題となるのが最終王権でマンドレルミル表
面の熱処理スケールが取り除かねた状態で使用される場
合、あるいは使用途中で暁付き、肌荒れ、寸法不良等を
生じた時に再研磨を施こされた状態で使用される場合等
、いわゆる機械加工された状態のままで使用される場合
で、著しく焼付きを生じやすい。Various patents have been filed regarding the material, heat treatment, surface treatment, surface roughness, etc. of bars used in mandrel mills, but for domestic mandrel mills, for example, SCr
Hardened and tempered materials are often used. The problem here is the final power, and if the mandrel mill is used with heat-treated scale on the surface that cannot be removed, or if the mandrel mill develops scratches, roughness, dimensional defects, etc. during use, it must be re-polished. When used in a so-called machined state, seizure is extremely likely to occur.
マンドレルバ−表面を新バーのような金属肌のまま圧延
する場合、従来はバー加工後、黒鉛的１０〜４０ｗｔ％
、合成樹脂約５〜３０ｗｔ％、分散剤約１〜５ｗｔ％、
水約２５〜８５ｗｔ％からなる黒鉛系潤滑剤を用いて、
バー表面に約５０〜１００？／ｍ”；ｉ！度の付着量と
なるよう塗布し、十分乾燥後（１昼夜以上）使用してい
る。従って、潤滑剤の付着量を増すことで、圧延後半の
潤滑剤切れによるバー焼付きを防いでいるのが現状であ
る。When rolling the mandrel bar surface with a metal skin like a new bar, conventionally, after bar processing, 10 to 40 wt% of graphite was used.
, about 5 to 30 wt% of synthetic resin, about 1 to 5 wt% of dispersant,
Using a graphite-based lubricant consisting of about 25 to 85 wt% water,
Approximately 50 to 100 on the bar surface? /m”;i! degrees and used after sufficiently drying (over 1 day and night). Therefore, by increasing the amount of lubricant applied, bar burning due to lack of lubricant in the latter half of rolling can be prevented. The current situation is to prevent this from happening.
これまでのタイプの潤滑剤を塗布した改削バーを使用す
ると、
（１）圧延後半ＶＣｉ８滑切れを起こしやすく、潤作切
れを起こした場合には、鉄素地が露出する為、焼付きを
生じる事、
（ｔｉ） ｆｉＪ時ＫＩＪストレインカ（マンドレル
パース圧延方向のテンシ１ン）が高くなり、シェルから
のバーストリッピングが悪くなる事、その際バーのビビ
リ振動が大となり、設備負荷大となり設備損傷の恐れが
ある事等
が問題点として上げられる。When using a modified bar coated with a conventional type of lubricant, (1) VCi8 tends to slip during the latter half of rolling, and if the lubricant runs out, the iron base is exposed, resulting in seizure. (ti) During fiJ, the KIJ strainer (tension in the mandrel pass rolling direction) becomes high, which worsens bar stripping from the shell, and at this time, the chatter vibration of the bar becomes large, which increases the equipment load and damages the equipment. The problem is that there is a risk of
これらの原因は先にも述べたように潤滑切れを起こすと
鉄素地が出る為、一般に言われている国化鉄膜層による
潤滑効果が期待出来なくなる事、又素地が出てくる為、
焼付きやすくなってくる事が考えられる。The reason for these is that, as mentioned earlier, when the lubrication runs out, the iron matrix comes out, so the generally said lubricating effect of the national iron film layer can no longer be expected, and the iron matrix comes out.
It is possible that it becomes more likely to seize.
従って、何本か圧延を繰り返すと素材から受ける熱と醗
素にて徐々にスケール層が形成され、哄付きにくくなっ
【くるので、このような状態ではかかる難点は一般に減
少するが、潰足し得る正常運転に入るまで時間がかかる
難点を有する。Therefore, when rolling is repeated several times, a scale layer is gradually formed due to the heat and solute received from the material, and it becomes difficult to stick.In such conditions, these difficulties generally decrease, but it can cause collapse. It has the disadvantage that it takes time to start normal operation.
本発明は、かかる状況に鑑みなされたものであって、マ
ンドレルミル表面の熱処理スケールが取り除かれた状態
や再研磨を施こされた状態で使用される場合において、
潤滑切れによる焼付き等を生せず、製管作業に満足しえ
る潤滑性能を発揮する熱間金属加工用潤滑剤を提供する
ことを目的とする。The present invention has been made in view of such circumstances, and when used with the heat treatment scale removed from the surface of the mandrel mill or with the surface re-polished,
The purpose of the present invention is to provide a lubricant for hot metal processing that does not cause seizure due to lack of lubrication and exhibits lubrication performance that is satisfactory for pipe manufacturing work.
本発明者らは、かがる観点において鋭意検討の結果、黒
鉛ｋＩ￥ｆ定の化合物を配合することＫより作業環境で
の汚染がなく、しかも新バーや再研磨バーにただ塗布す
るだけで、黒鉛系潤滑剤の潤滑効果を期待するだけでな
く、鉄素地の露出した表面に緻密で強固な酸化鉄皮膜を
形成させることができることを見出し本発明を完成した
ものである。As a result of intensive studies from the viewpoint of grinding, the present inventors found that blending a compound with graphite kI￥f constant causes less contamination in the working environment, and moreover, it is easier to simply apply it to a new bar or reground bar. The present invention was completed by not only expecting the lubricating effect of graphite-based lubricants, but also by discovering that a dense and strong iron oxide film could be formed on the exposed surface of an iron substrate.
すなわち、本発明は黒鉛および合成系重合体からなる熱
間金属加工用潤滑剤において、さらに有機カルボン酸を
含有することを特徴とする熱間金属加工用潤滑剤に存す
る。That is, the present invention resides in a lubricant for hot metal working comprising graphite and a synthetic polymer, which further contains an organic carboxylic acid.
本発明におい【使用される黒鉛は、粉末であれば天然品
、合成品とも使用でき、粒径は約１ｏｏμ以下で少なく
とも約８０％以上の純度を持つものが好ましく、特に好
ましくは粒径的１μ〜５０μ、純度約９０％以上のもの
が好適に使用される。本発明に使用される合成系重合体
としては、酢酸ビニル、エチレン−酢酸ビニル等のビニ
ルエステル類の重合体及び共重合体、アクリル酸又はそ
のエステル類の重合体及び共重合体、スチレンやエチレ
ンの重合体又は共重合体、不飽和ジカルボン酸の重合体
又は共重合体等が使用出来る。In the present invention, the graphite used can be either a natural product or a synthetic product as long as it is a powder, and preferably has a particle size of about 1 ooμ or less and a purity of at least about 80%, particularly preferably a particle size of 1μ ~50μ and purity of about 90% or more is preferably used. Synthetic polymers used in the present invention include vinyl acetate, polymers and copolymers of vinyl esters such as ethylene-vinyl acetate, polymers and copolymers of acrylic acid or its esters, styrene and ethylene. Polymers or copolymers of unsaturated dicarboxylic acids, polymers or copolymers of unsaturated dicarboxylic acids, etc. can be used.
本発明において使用される有機カルボン酸としては、本
発明の潤滑剤を水中に分散させた場合に酸性領域、好ま
しくはｐＨ４以下を保持することができる次のような化
合物を用いることができる。As the organic carboxylic acid used in the present invention, the following compounds can be used that can maintain the lubricant of the present invention in an acidic range, preferably at pH 4 or less when dispersed in water.
このような有機カルボン酸を一定量含有させることによ
り、水中に分散させた場合酸性とすることができ、鉄表
面に容易に酸化皮膜を形成することができる。By containing a certain amount of such an organic carboxylic acid, it can be made acidic when dispersed in water, and an oxide film can be easily formed on the iron surface.
さらに本発明の潤滑剤には通常の水溶性分散剤、例えば
カルボキシメチルセルロース（ＣＭＣ）、ポリサッカラ
イド、グアーガム等の天然又は合成系多糖類、ポリビニ
ルアルコール、ポリオキシエチレンアルキルエーテル、
スルホネート等の合成系分散剤や普通一般に防腐剤、防
錆剤、消泡剤と呼ばれて〜・るものを添加して使用する
ことも可能である。Furthermore, the lubricant of the present invention includes common water-soluble dispersants, such as carboxymethyl cellulose (CMC), polysaccharides, natural or synthetic polysaccharides such as guar gum, polyvinyl alcohol, polyoxyethylene alkyl ether,
It is also possible to use synthetic dispersants such as sulfonates, and what are commonly called preservatives, rust preventives, and antifoaming agents.
黒鉛、合成系重合体、有機カルボン酸の三成分それぞれ
の好ましい配合割合は、黒鉛は約２０ ｗｔ係以上、合
成系重合体は約１５ｗｔ％以上、有機カルボン酸は約５
ｗｔ％以上であり、％に好ましい配合割合としては黒鉛
的３０〜５５ ｗｔ ％、合成系重合体約１５〜６５ｗ
ｔ４、有機カルボン酸約１０〜３０ｗｔ％の範囲である
。The preferred blending ratio of each of the three components, graphite, synthetic polymer, and organic carboxylic acid, is approximately 20 wt% or more for graphite, approximately 15 wt% or more for synthetic polymer, and approximately 5 wt% for organic carboxylic acid.
The preferred blending ratio is 30 to 55 wt % for graphite, and about 15 to 65 w for synthetic polymer.
t4, organic carboxylic acid ranges from about 10 to 30 wt%.
ここで黒鉛の配合量が少なすぎると本来の潤滑性に問題
が生じ、合成系重合体の配合量が少なすぎると造膜性に
離が生じ、均一な潤滑性が得られず、有機カルボン酸の
配合量が少なすぎると有効な酸化鉄皮膜が得られない。If the amount of graphite blended is too small, problems will occur with the original lubricity, and if the blended amount of synthetic polymer is too small, film-forming properties will vary, uniform lubricity cannot be obtained, and organic carboxylic acid If the blending amount is too small, an effective iron oxide film cannot be obtained.
また、水中に分散させる本発明潤滑剤の配合量は約１０
〜９０ｗｔ％、好ましくは約３５〜８５ｗｔ係であり、
多過ぎると粘度が高くなり取扱いに難点を有するように
なり、少なすぎるとバーへの付着性が悪くなり潤滑性が
劣る。The amount of the lubricant of the present invention dispersed in water is approximately 10
~90wt%, preferably about 35-85wt%,
If it is too large, the viscosity will be high and it will be difficult to handle, and if it is too small, the adhesion to the bar will be poor and the lubricity will be poor.
本発明による熱間金属加工用潤滑剤の効果をまとめると
次の通りである。The effects of the lubricant for hot metal working according to the present invention are summarized as follows.
１）マンドレルミル表面の熱処理スケールを敗り除いた
状態や再研磨を施こした状態において、本発明の潤滑剤
を使用することにより潤滑効果が期待できる酸化鉄膜が
形成する。1) By using the lubricant of the present invention, an iron oxide film that can be expected to have a lubricating effect is formed when heat-treated scale on the mandrel mill surface has been removed or after re-polishing.
２）圧延初期において潤滑性を保持し、情付きを防止す
ることによりシェルからのバーストリッピングを良好に
し、設備負荷を抑えることができる。2) By maintaining lubricity in the initial stage of rolling and preventing sagging, burst stripping from the shell can be improved and equipment load can be suppressed.
３）焼付防止によ抄、造管性、製品品質を良好にして焼
付きバー交換等のための圧延ロス時間を減少させ、生産
性向上を図ることができる。3) By preventing seizure, it is possible to improve paper forming, pipe forming properties, and product quality, reduce rolling loss time due to seizure bar replacement, etc., and improve productivity.
次に本発明の実施例及び比較例を第１表、第２表に示す
が本発明はこれらによって限定されるものではない。Next, Examples and Comparative Examples of the present invention are shown in Tables 1 and 2, but the present invention is not limited thereto.
以下、実施例に基づいて本発明の内容をよ炒具体的に説
明する。Hereinafter, the contents of the present invention will be specifically explained based on Examples.
具体的な成分の実施例、比較例を表−１、表−２に示す
が、使用方法としては、鉄素地の霧出した表層にブラシ
、ハケを用いて約５０〜１００？／ ｍ ” ｓ度塗布
し、約−昼夜そのままＫしておくと、実施例で示した潤
滑剤では約２Ｊ〜４声の酸化被膜層が形成される。通常
の圧延にて形成されるミルスケール層約２０μからすれ
ば薄いが、最初の数本での耐焼付き性に優れた効果を呈
する。Examples and comparative examples of specific ingredients are shown in Tables 1 and 2, and the method of use is to use a brush or a brush on the misted surface layer of the iron base to remove about 50 to 100 ml of water. /m''s degrees and left to stand for about -24 hours, the lubricant shown in the example will form an oxide film layer of about 2J to 4 degrees.Mill scale formed by normal rolling. Although the layer is thin (approximately 20 μm), it exhibits excellent anti-seizing properties for the first few layers.
リストレイン力で比較しても、本発明の潤滑剤を塗布し
たものは、１木目からほとんど慣れバーに近いリストレ
イン力であるのに対し、これまでの潤滑剤だとリストレ
イン力が約２０％〜３０％高い事が分かる。Even when comparing the restraint force, the one coated with the lubricant of the present invention has a restraint force almost close to that of a break-in bar from the first grain, whereas the restraint force with the conventional lubricant is about 20. % to 30% higher.
すなわち、比較例で示した潤滑剤では、塗布量を増して
も有効な酸化被膜層が形成されないので良好な潤滑性が
得られないものである。表−３にリストレイン力、造管
性及び製品品質についての結果を示す。被加工材は、５
ＴＨ（ハイカーボンスチール）を用い内径２３２冒、肉
厚５．５■、長さ２６ｍとなるようにバー径が２３１−
のマンドレルミルを用いた。That is, with the lubricant shown in the comparative example, an effective oxide film layer is not formed even if the amount of application is increased, so good lubricity cannot be obtained. Table 3 shows the results regarding restraint force, pipe formability, and product quality. The workpiece material is 5
Using TH (high carbon steel), the bar diameter is 231mm with an inner diameter of 232mm, wall thickness of 5.5mm, and length of 26m.
A mandrel mill was used.
リストレイン力は、駆動モータの電流値から換算したト
ルク値であるが、リストレイン力線図の一例を第１図に
示す。The restraint force is a torque value converted from the current value of the drive motor, and an example of a restraint force diagram is shown in FIG. 1.
第１図はマンドレルミルでの造管作業中のリストレイン
力線図の一例であ妙、縦軸はリストレイン力、そして横
軸は時間である。図において、（１）は最大リストレイ
ン力、（２）は被加工材にマンドレルを貫通させる工程
そして（３）は被加工材からマンドレルをストリッピン
グさせる工程である。Figure 1 is an example of a restraint force diagram during pipe making work in a mandrel mill.The vertical axis is the restraint force, and the horizontal axis is time. In the figure, (1) is the maximum restraining force, (2) is the process of penetrating the mandrel into the workpiece, and (3) is the process of stripping the mandrel from the workpiece.
Claims (1)
において、さらに有機カルボン酸を含有することを特徴
とする熱間金属加工用潤滑剤。A lubricant for hot metal working comprising graphite and a synthetic polymer, further comprising an organic carboxylic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125797A JPH0826342B2 (en) | 1990-05-16 | 1990-05-16 | Lubricant for mandrel mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125797A JPH0826342B2 (en) | 1990-05-16 | 1990-05-16 | Lubricant for mandrel mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0420599A true JPH0420599A (en) | 1992-01-24 |
| JPH0826342B2 JPH0826342B2 (en) | 1996-03-13 |
Family
ID=14919129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2125797A Expired - Fee Related JPH0826342B2 (en) | 1990-05-16 | 1990-05-16 | Lubricant for mandrel mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0826342B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172664A (en) * | 1999-12-22 | 2001-06-26 | Daido Metal Co Ltd | Lubricating agent |
| CN114181768A (en) * | 2021-12-17 | 2022-03-15 | 湖南金化科技集团有限公司 | Preparation process of water-based graphite lubricant for hot-rolled steel pipe core rod |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849800A (en) * | 1981-09-18 | 1983-03-24 | Nippon Steel Chem Co Ltd | Lubricant composition for high temperature |
| JPS58138795A (en) * | 1982-02-10 | 1983-08-17 | Nippon Kokuen Kogyo Kk | Lubricating agent for mandrel bar |
| JPS62250099A (en) * | 1986-04-04 | 1987-10-30 | ロンザ リミテツド | Lubricant composition used in rolling of plate and mold materials |
-
1990
- 1990-05-16 JP JP2125797A patent/JPH0826342B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849800A (en) * | 1981-09-18 | 1983-03-24 | Nippon Steel Chem Co Ltd | Lubricant composition for high temperature |
| JPS58138795A (en) * | 1982-02-10 | 1983-08-17 | Nippon Kokuen Kogyo Kk | Lubricating agent for mandrel bar |
| JPS62250099A (en) * | 1986-04-04 | 1987-10-30 | ロンザ リミテツド | Lubricant composition used in rolling of plate and mold materials |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172664A (en) * | 1999-12-22 | 2001-06-26 | Daido Metal Co Ltd | Lubricating agent |
| CN114181768A (en) * | 2021-12-17 | 2022-03-15 | 湖南金化科技集团有限公司 | Preparation process of water-based graphite lubricant for hot-rolled steel pipe core rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0826342B2 (en) | 1996-03-13 |
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