JPH06170437A - Hot extruding tube making method - Google Patents
Hot extruding tube making methodInfo
- Publication number
- JPH06170437A JPH06170437A JP31964492A JP31964492A JPH06170437A JP H06170437 A JPH06170437 A JP H06170437A JP 31964492 A JP31964492 A JP 31964492A JP 31964492 A JP31964492 A JP 31964492A JP H06170437 A JPH06170437 A JP H06170437A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- lubricant
- powder
- die
- extrusion
- 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.)
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Links
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- Extrusion Of Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱間押出しによる製管
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe manufacturing method by hot extrusion.
【０００２】[0002]
【従来の技術】熱間押出し製管法は、一般に次のように
して行われる。2. Description of the Related Art The hot extrusion tube forming method is generally performed as follows.
【０００３】図１は、熱間押出し直前の状態を説明する
ための断面図であり、コンテナ６には中心部を穿孔した
円筒状のビレット８が挿入されている。コンテナ６の一
端の開口部にはダイホルダ４が設けられており、ダイホ
ルダ４の内縁側にはダイバッカー５およびそれと隣接さ
せてダイス２が嵌入されている。このコンテナ６内には
所定温度に加熱され、その内外周面に粉状ガラス潤滑剤
（それぞれ内面潤滑剤、外面潤滑剤という）を塗布され
たビレット８がその先端をダイス２に向けて挿入されて
おり、ビレット８の軸心にはマンドレル３が挿入されて
いる。ビレット８の他端にはダミーブロック７が配置さ
れている。FIG. 1 is a cross-sectional view for explaining a state immediately before hot extrusion, in which a cylindrical billet 8 having a center hole is inserted in a container 6. A die holder 4 is provided in an opening at one end of the container 6, and a die backer 5 and a die 2 adjacent to the die backer 5 are fitted on the inner edge side of the die holder 4. A billet 8 which is heated to a predetermined temperature and whose inner and outer peripheral surfaces are coated with powdered glass lubricant (referred to as inner surface lubricant and outer surface lubricant, respectively) is inserted into the container 6 with its tip facing the die 2. The mandrel 3 is inserted in the shaft center of the billet 8. A dummy block 7 is arranged at the other end of the billet 8.
【０００４】ダイス２のビレット８側には、その内径が
ダイス２の内径より少し大きく、最大外径がコンテナ６
の内径とほぼ等しい正面潤滑剤としてのガラスディスク
１が装着されている。ガラスディスク１は、粉粒状のガ
ラスを、例えば水ガラス、ゴム類、さらにはガラスとの
接着性を有するビニル系樹脂、ポリアミド系樹脂、フェ
ノール系樹脂およびポリエステル系樹脂等のバインダー
により円板状に成形し固化乾燥したものである。On the billet 8 side of the die 2, the inner diameter is slightly larger than the inner diameter of the die 2, and the maximum outer diameter is the container 6
A glass disk 1 as a front surface lubricant, which is approximately equal to the inner diameter of the disk, is mounted. The glass disk 1 is formed into a disk shape by using powdery and granular glass with a binder such as water glass, rubbers, and vinyl resin, polyamide resin, phenol resin, polyester resin, etc., which have adhesiveness to glass. It is molded, solidified and dried.
【０００５】そして、図示しないステムにより矢印方向
にダミーブロック７を押圧すると、ビレット８がアプセ
ットされるとともにダイス２とマンドレル３とで形成さ
れる環状空隙から押し出され、ダイス２の内径に対応す
る外径と、マンドレル３の外径に対応する内径とを有す
る管が製造される。このときガラスディスク１はビレッ
トの熱で表面が少しずつ軟化、溶融して、ビレット外表
面に塗布したガラス粉とともにダイス２とビレット８と
の間の潤滑剤として作用する。Then, when the dummy block 7 is pressed in the direction of the arrow by a stem (not shown), the billet 8 is upset and pushed out from the annular gap formed by the die 2 and the mandrel 3, and the outside corresponding to the inner diameter of the die 2 is pushed. A tube having a diameter and an inner diameter corresponding to the outer diameter of the mandrel 3 is manufactured. At this time, the surface of the glass disk 1 is gradually softened and melted by the heat of the billet, and acts as a lubricant between the die 2 and the billet 8 together with the glass powder applied to the outer surface of the billet.
【０００６】ところが、難加工性のフェライト系ステン
レス鋼材を上述の熱間押出し製管法により押出した場
合、フェライト組織に代表される体心立方格子の金属が
有する塑性異方性により、押出しの変形初期から管の軸
方向にしわ疵と呼ばれるスジ状の欠陥が発生する。ダイ
ス直下では、このしわの山部で溶融ガラス潤滑膜が切
れ、ダイスとの焼付きが起こる。However, when a hard-to-work ferritic stainless steel material is extruded by the above-mentioned hot extrusion tube forming method, the deformation of extrusion is caused by the plastic anisotropy of the metal of the body-centered cubic lattice represented by the ferrite structure. From the beginning, streak-like defects called wrinkles occur in the axial direction of the pipe. Immediately below the die, the molten glass lubricating film is cut off at the peaks of the wrinkles, and seizure with the die occurs.
【０００７】この潤滑膜切れを防止する方法として、
粘性の高いガラスを正面潤滑剤として使用して膜に強度
を持たせるか、溶融量の多いガラスを正面潤滑剤に使
用して膜を厚くするのが良いとされてきた。しかし、
の粘性の高いガラスは一般に溶融性が悪いので、高粘度
で膜強度はあるが溶融量が少なく膜が薄くなる。また、
の溶融性の良いガラスは低粘性であるので、しわの山
部での膜強度がなく膜切れを起こしやすく、いずれの方
法によっても焼付きの発生を満足に防止することはでき
なかった。As a method for preventing the lubricant film from breaking,
It has been considered preferable to use glass with high viscosity as a front lubricant to give strength to the film, or to use glass with a large amount of melting as a front lubricant to thicken the film. But,
Since the glass with high viscosity generally has poor meltability, it has high viscosity and film strength, but the amount of melting is small and the film becomes thin. Also,
Since the glass having good meltability has low viscosity, it has no film strength at the wrinkle peaks and is liable to cause film breakage, and any of the methods could not satisfactorily prevent the occurrence of seizure.
【０００８】このように溶融性と粘性は一般に相反する
性質であるので、これらが両立するようなガラス組成は
現在のところ得られていない。As described above, since the meltability and the viscosity are generally contradictory to each other, a glass composition which makes them compatible has not been obtained at present.
【０００９】特開昭56−144817号公報には、ガラス粉末
に微細な金属酸化物の粉末を配合した潤滑剤を押出材料
の表面に塗布して押出しする方法が記載されている。し
かしこの方法では、押出し前の材料表面に塗布するので
押出変形により管表面積が増大し、それに伴って潤滑膜
が薄く伸ばされて潤滑膜切れが生じやすい。特に、局部
的に高面圧となる押出し製管においては、その高面圧と
なる部分から潤滑膜切れを起こし焼付きを生じる。Japanese Unexamined Patent Publication (Kokai) No. 56-144817 describes a method of applying a lubricant prepared by mixing glass powder with a fine metal oxide powder onto the surface of an extruded material and extruding it. However, in this method, since the material is applied to the surface of the material before extrusion, the surface area of the pipe increases due to extrusion deformation, and the lubricant film is thinly stretched accordingly, and the lubricant film is easily broken. In particular, in an extruded pipe where the surface pressure is locally high, the lubricant film is broken from the portion where the surface pressure is high, causing seizure.
【００１０】[0010]
【発明が解決しようとする課題】本発明は、潤滑膜切れ
の生じない熱間押出し製管方法の提供を目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot-extrusion pipe manufacturing method in which a lubricating film is not broken.
【００１１】[0011]
【課題を解決するための手段】本発明の要旨は、「押出
し温度域における粘度が105Poise以下のガラス粉末に、
平均粒径が１〜100 μｍでありかつ同温度域で溶融する
ことのない固体潤滑粉末を２〜20体積％配合し、バイン
ダーを加えて成形したガラスディスクを正面潤滑剤とし
て使用する熱間押出し製管方法」にある。Means for Solving the Problems The gist of the present invention is that "a glass powder having a viscosity in the extrusion temperature range of 10 5 Poise or less,
Hot extrusion using 2 to 20% by volume of solid lubricating powder with an average particle size of 1 to 100 μm and not melting in the same temperature range, and using a glass disk molded with a binder as a front lubricant Pipe making method ”.
【００１２】[0012]
【作用】本発明の熱間押出し製管方法に用いる正面潤滑
剤としてのガラスディスクは、その成分中に上記のよう
な固体潤滑粉末を含んでいるので潤滑膜強度が高く、高
面圧下でも膜切れを起こすこともない。特に、フェライ
ト系ステンレス鋼材のように、表面にしわが発生し、局
部的に高面圧となる場合の製管においても有効である。The glass disk as a front surface lubricant used in the hot extrusion tube manufacturing method of the present invention contains the solid lubricating powder as described above in its component, so that the strength of the lubricating film is high and the film is formed even under a high surface pressure. It does not break. In particular, it is also effective in the pipe manufacturing when wrinkles are generated on the surface and the surface pressure is locally high as in the case of ferritic stainless steel.
【００１３】このガラスディスク中に含まれる固体潤滑
粉末は、通常の製管温度である 900℃弱〜1200℃強の温
度で溶融することがなく、ガラスのみが溶融する。そし
て、この固体潤滑粉末は溶融したガラスによって剪断を
受け、一緒にダイス直下へ導入される。この時、この固
体潤滑粉末はいわゆる固体潤滑剤としてはたらき、ダイ
スと押出材との接触を防ぐことができる。The solid lubricating powder contained in the glass disk does not melt at a temperature of 900 ° C. to 1200 ° C. which is a normal pipe-making temperature, and only glass melts. Then, this solid lubricating powder is sheared by the molten glass and is introduced directly below the die together. At this time, this solid lubricating powder acts as a so-called solid lubricant, and can prevent contact between the die and the extruded material.
【００１４】以下、本発明の熱間押出し製管において正
面潤滑として用いるガラスディスクの組成について説明
する。The composition of the glass disk used for front surface lubrication in the hot extrusion pipe of the present invention will be described below.
【００１５】ガラス粉末は押出温度における粘度が105P
oise (ポアズ；以下Ｐと記す）以下であることが必要で
ある。 105Ｐを超えると押出し温度における溶融量が少
なく、１μｍ以上のガラス膜を得難いので、潤滑膜切れ
を生じやすい。The glass powder has a viscosity of 10 5 P at the extrusion temperature.
It must be less than or equal to oise (Poise; hereinafter referred to as P). If it exceeds 10 5 P, the melting amount at the extrusion temperature is small and it is difficult to obtain a glass film having a thickness of 1 μm or more.
【００１６】固体潤滑粉末としては、黒鉛、窒化ホウ
素、雲母あるいは酸化鉄などのように押出し温度域で溶
融しないものを用いる。As the solid lubricating powder, graphite, boron nitride, mica, iron oxide or the like which does not melt in the extrusion temperature range is used.
【００１７】この固体潤滑粉末は、ガラス粉末量に対し
て２〜20体積％の割合で配合する。This solid lubricating powder is blended in a proportion of 2 to 20% by volume with respect to the amount of glass powder.
【００１８】２体積％未満では、固体潤滑剤としての効
果が不十分で潤滑膜切れを起こしやすいし、20体積％を
超えて含むと溶融性が劣化してダイス直下への潤滑剤の
導入量が不足する。If it is less than 2% by volume, the effect as a solid lubricant is insufficient and the lubricating film is liable to be broken, and if it exceeds 20% by volume, the meltability is deteriorated and the amount of the lubricant introduced directly under the die. Run out.
【００１９】ガラスディスクは、上記のガラス粉末と固
体潤滑粉末とを混合した粉体に、水ガラス等のバインダ
ーを用いて円盤上に成形し、その後固化乾燥して製作す
る。The glass disk is manufactured by molding a powder obtained by mixing the above-mentioned glass powder and solid lubricating powder on a disk using a binder such as water glass, and then solidifying and drying.
【００２０】本発明の方法においては、上記組成のガラ
スディスクを正面潤滑剤として使用して押出し製管をす
るから、押出変形で管表面積が拡大しても変形部に対し
てガラスディスクから潤滑剤が円滑に供給されることに
なり、潤滑膜が切れることなく押出すことができる。In the method of the present invention, since a glass disk having the above composition is used as a front lubricant to form an extruded pipe, even if the surface area of the pipe is increased by extrusion deformation, the lubricant is applied from the glass disc to the deformed portion. Is smoothly supplied, and the lubricant film can be extruded without breaking.
【００２１】上記のように固体潤滑粉末がダイス直下ま
で導入されるためには、固体潤滑粉末の平均粒径が大き
すぎないことが必要である。一般に、ガラスディスクを
用いて押出製管を行った場合、ガラス膜の厚みは 100μ
ｍ以下であるので、 100μｍを超えるような粒径の粉末
はダイス直下へは導入されない。この粒径は小さいほど
導入されやすいが、あまり細かいと、ダイスと押出材と
の接触を防止する固体潤滑剤としての効果が損なわれ
る。したがって、平均粒径は１μｍ〜 100μｍであるこ
とが必要である。In order for the solid lubricating powder to be introduced just below the die as described above, it is necessary that the average particle size of the solid lubricating powder is not too large. Generally, when an extruded tube is produced using a glass disk, the thickness of the glass film is 100 μm.
Since the particle size is less than m, powder having a particle size exceeding 100 μm cannot be introduced directly under the die. The smaller the particle size, the easier the introduction, but if the particle size is too small, the effect as a solid lubricant for preventing the contact between the die and the extruded material is impaired. Therefore, it is necessary that the average particle size is 1 μm to 100 μm.
【００２２】以下、本発明を実施例に基づいて説明す
る。The present invention will be described below based on examples.
【００２３】[0023]
【実施例１】表１に押出しの条件を示す。表２(1) 〜表
２(3) (以下まとめて表２という）に示すようにＣ-105
(商品名、千代田化学株式会社製、1020℃で粘度が10
1.17Ｐ) 、Ｃ−５Ｈ (商品名、同社製、1020℃で粘度が
103.8Ｐ) 、ＮＷＨ (商品名、同社製、1020℃で粘度が
約 105Ｐ) の３種類のガラス粉末に、それぞれ、黒鉛、
窒化ホウ素、雲母、酸化鉄の各固体潤滑粉末を、平均粒
径、配合比を違えて配合し、水ガラス（キミダ化学株式
会社製、ケイ酸ソーダ３号（商品名））をバインダーと
してディスクに成形し固化乾燥してガラスディスクを製
作した。この時のディスクの縦断面形状を図２に示す。Example 1 Table 1 shows extrusion conditions. As shown in Table 2 (1) to Table 2 (3) (hereinafter collectively referred to as Table 2), C-105
(Product name, manufactured by Chiyoda Chemical Co., Ltd., viscosity at 1020 ° C is 10
1.17 P), C-5H (trade name, manufactured by the same company, viscosity at 1020 ° C
10 3.8 P), NWH (trade name, manufactured by the same company, viscosity at 1020 ° C is about 10 5 P), three types of glass powder, graphite,
Solid lubricant powders of boron nitride, mica, and iron oxide were blended with different average particle diameters and blending ratios, and water glass (Kimida Chemical Co., Ltd., sodium silicate No. 3 (trade name)) was used as a binder for disks. A glass disk was manufactured by molding, solidifying and drying. The vertical sectional shape of the disk at this time is shown in FIG.
【００２４】このガラスディスクを図１に示すように設
置し、従来と同様の方法で押出しを行って、押出し後の
管およびダイスの表面状態を目視で観察して焼付きの有
無を調べた。なお、押出し条件は表１に示す通り、ビレ
ットとして外径 174mm、内径41mm、長さ 400mmの25％Cr
フェライト系ステンレス鋼(JIS-SUH446)を用い、ダイス
内径50mm、マンドレル外径38mm、押出温度1020℃、ラム
速度180mm/sec とした。また、押出材表面には外面潤滑
剤としてＣ−５Ｈのガラス粉末を塗布した。This glass disk was set as shown in FIG. 1 and extruded in the same manner as in the prior art, and the state of the surface of the extruded tube and die was visually observed to check for seizure. The extrusion conditions are as shown in Table 1 as a billet with an outer diameter of 174 mm, an inner diameter of 41 mm, and a length of 400 mm of 25% Cr.
Using ferritic stainless steel (JIS-SUH446), the die inner diameter was 50 mm, the mandrel outer diameter was 38 mm, the extrusion temperature was 1020 ° C, and the ram speed was 180 mm / sec. Further, a glass powder of C-5H was applied as an outer surface lubricant to the surface of the extruded material.
【００２５】表２に示すように、黒鉛、窒化ホウ素、雲
母、酸化鉄の各固体潤滑粉末を２〜20体積％の配合比
で、かつ平均粒径が１〜100 μｍの範囲で配合したガラ
スディスクを用いた押出し製管では、ダイスとの焼付き
が防止できる。さらに、固体潤滑粉末の種類の影響は少
なく、配合比、平均粒径によって、潤滑状態が左右され
ることが分かる。したがって、表２の４種類に限らず、
押出し温度域で溶融することのない平均粒径が１〜100
μｍの固体潤滑粉末であればこれらを単独あるいは複数
組み合わせて２〜20体積％配合することにより、同様の
効果が得られる。As shown in Table 2, a glass in which solid lubricating powders of graphite, boron nitride, mica and iron oxide are blended in a blending ratio of 2 to 20% by volume and an average particle diameter is in the range of 1 to 100 μm. In the extrusion pipe manufacturing using a disc, seizure with a die can be prevented. Furthermore, it can be seen that the effect of the type of solid lubricating powder is small, and the lubrication state depends on the compounding ratio and average particle size. Therefore, not only the four types in Table 2,
Average particle size of 1-100 without melting in the extrusion temperature range
If it is a solid lubricating powder of μm, the same effect can be obtained by blending these individually or in combination of 2 to 20% by volume.
【００２６】一方、固体潤滑粉末を含まないガラスディ
スク（固体粉末の配合比０％）を用いた場合には、いず
れもしわの山部あるいは全面で焼付きを生じた。On the other hand, when a glass disk containing no solid lubricating powder (compounding ratio of solid powder of 0%) was used, seizure occurred on the peaks or the entire surface of wrinkles.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【表２（１）】 [Table 2 (1)]
【００２９】[0029]
【表２（２）】 [Table 2 (2)]
【００３０】[0030]
【表２（３）】 [Table 2 (3)]
【００３１】[0031]
【実施例２】本発明の熱間押出し製管方法で正面潤滑に
用いるガラスディスクと併せて、押出し温度域における
粘度が 105Ｐ以下のガラス粉末を押出材外表面にあらか
じめ塗布した後、実施例１と同様にして熱間押出し製管
を行った。また押出し条件は実施例１と同じで表１の通
りである。その結果を表３に示す。Example 2 A glass powder having a viscosity in the extrusion temperature range of 10 5 P or less was applied in advance on the outer surface of the extruded material together with the glass disk used for front surface lubrication in the hot extrusion tube-making method of the present invention. Hot extrusion was performed in the same manner as in Example 1. The extrusion conditions are the same as in Example 1 and are shown in Table 1. The results are shown in Table 3.
【００３２】比較例として、固体潤滑粉末を配合しない
正面潤滑剤を用いた熱間押出し製管を試験した。すなわ
ち、押出し温度域における粘度が 105Ｐ以下のガラス粉
末に、平均粒径が１〜100 μｍでありかつ同温度域で溶
融することのない固体潤滑粉末を２〜20重量％配合した
ものを外面潤滑剤として押出材表面に予め塗布し、ガラ
スディスクには固体潤滑粉末を配合しない押出し温度域
における粘度が 105Ｐ以下のガラス粉末のみからなるも
のを用いて、実施例１と同様の条件で押出しを行った。
その結果を表４に示す。As a comparative example, a hot extruded pipe using a front lubricant containing no solid lubricating powder was tested. That is, a mixture of glass powder having a viscosity in the extrusion temperature range of 10 5 P or less with 2 to 20% by weight of a solid lubricating powder having an average particle size of 1 to 100 μm and not melting in the same temperature range is used. The same conditions as in Example 1 were used by using as the outer surface lubricant a glass disk which was previously applied on the surface of the extruded material and which was composed of only glass powder having a viscosity of 10 5 P or less in the extrusion temperature range in which the solid lubricating powder was not blended. Was extruded.
The results are shown in Table 4.
【００３３】表３に示すように、ガラスディスクとし
て、固体潤滑粉末を配合したものを用いる本発明の方法
では、しわの山部においても焼付くことなく製管するこ
とができた。これに対し、表４に示すように、ガラス粉
末のみからなるガラスディスクを用いる一方で、外面潤
滑剤としてガラス粉末に固体潤滑粉末を配合したものを
使用した場合には、管表面のしわの部分で焼付きを生じ
た。なお、結果の表示は省略するが、外面潤滑剤にもガ
ラスディスクにも固体潤滑粉末を配合しないガラス粉末
のみからなるものを使用して押出しをおこなったところ
管表面全域に焼付きを生じた。As shown in Table 3, according to the method of the present invention in which a glass disk containing a solid lubricating powder was used, pipes could be produced without seizure even at the crests of wrinkles. On the other hand, as shown in Table 4, when a glass disk made of only glass powder was used, and when a mixture of glass powder and solid lubricating powder was used as the external surface lubricant, the wrinkled portion of the pipe surface was used. It caused burn-in. Although the display of the results is omitted, when the extruding was performed using the outer surface lubricant and the glass disk made of only the glass powder containing no solid lubricating powder, seizure occurred on the entire tube surface.
【００３４】[0034]
【表３】 [Table 3]
【００３５】[0035]
【表４】 [Table 4]
【００３６】[0036]
【発明の効果】本発明方法によれば、正面潤滑剤として
使用するガラスディスクが押出し温度域で溶融すること
のない固体潤滑粉末を２〜20体積％含むので、高面圧下
においても潤滑膜切れを起こすことがなく、押出材とダ
イス間の焼付きを生じさせずに熱間押出し製管を実現す
ることができる。According to the method of the present invention, since the glass disk used as the front surface lubricant contains 2 to 20% by volume of solid lubricating powder which does not melt in the extrusion temperature range, the lubricating film is broken even under high surface pressure. It is possible to realize a hot-extruded pipe without causing seizure between the extruded material and the die.
【図１】熱間押出し製管法を説明するための断面図であ
る。FIG. 1 is a cross-sectional view for explaining a hot extrusion pipe manufacturing method.
【図２】実施例で使用したガラスディスクの縦断面図で
ある。FIG. 2 is a vertical sectional view of a glass disk used in an example.
１：ガラスディスク、 ２：ダイス、 ３：
マンドレル、４：ダイホルダー、 ５：ダイバッカ
ー、 ６：コンテナ、７：ダミーブロック、 ８：
ビレット。1: Glass disc, 2: Dice, 3:
Mandrel, 4: Die holder, 5: Die backer, 6: Container, 7: Dummy block, 8:
Billet.
Claims (1)
下のガラス粉末に、平均粒径が１〜100μｍでありかつ
同温度域で溶融することのない固体潤滑粉末を２〜20体
積％配合し、バインダーを加えて成形したガラスディス
クを正面潤滑剤として使用することを特徴とする熱間押
出し製管方法。1. A solid lubricating powder having an average particle size of 1 to 100 μm and not melting in the same temperature range is added to 2 to 20% by volume of glass powder having a viscosity of 10 5 Poise or less in the extrusion temperature range. A hot-extrusion tube-making method, characterized in that a glass disk formed by adding a binder is used as a front lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04319644A JP3097359B2 (en) | 1992-11-30 | 1992-11-30 | Hot extrusion pipe making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04319644A JP3097359B2 (en) | 1992-11-30 | 1992-11-30 | Hot extrusion pipe making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06170437A true JPH06170437A (en) | 1994-06-21 |
| JP3097359B2 JP3097359B2 (en) | 2000-10-10 |
Family
ID=18112604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04319644A Expired - Fee Related JP3097359B2 (en) | 1992-11-30 | 1992-11-30 | Hot extrusion pipe making method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3097359B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227997A (en) * | 2009-03-30 | 2010-10-14 | Sumitomo Metal Ind Ltd | Glass lubricant for making tube by hot extrusion of metallic material and method of making tube by hot extrusion using the same |
| JP2010234375A (en) * | 2009-03-30 | 2010-10-21 | Sumitomo Metal Ind Ltd | Method of removing glass lubricant on inner surface of container for hot extrusion |
| JP2011121095A (en) * | 2009-12-11 | 2011-06-23 | Sumitomo Metal Ind Ltd | Lubricating glass-formed material, and method for manufacturing billet for tube-making by hot-extrusion |
| US20110219837A1 (en) * | 2008-12-01 | 2011-09-15 | Sumitomo Metal Industries, Ltd. | Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making |
| CN102974639A (en) * | 2012-12-25 | 2013-03-20 | 包进平 | Glass lubricating cushion for hot extrusion and capable of reducing extrusion force |
| CN105642690A (en) * | 2014-11-28 | 2016-06-08 | 财团法人金属工业研究发展中心 | Method for manufacturing steel section, extrusion device and steel extrusion ingot |
| CN113245391A (en) * | 2021-06-07 | 2021-08-13 | 青海中钛青锻装备制造有限公司 | Lubricating device for extruded pipe |
-
1992
- 1992-11-30 JP JP04319644A patent/JP3097359B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110219837A1 (en) * | 2008-12-01 | 2011-09-15 | Sumitomo Metal Industries, Ltd. | Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making |
| US8327676B2 (en) * | 2008-12-01 | 2012-12-11 | Sumitomo Metal Industries, Ltd. | Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making |
| JP2010227997A (en) * | 2009-03-30 | 2010-10-14 | Sumitomo Metal Ind Ltd | Glass lubricant for making tube by hot extrusion of metallic material and method of making tube by hot extrusion using the same |
| JP2010234375A (en) * | 2009-03-30 | 2010-10-21 | Sumitomo Metal Ind Ltd | Method of removing glass lubricant on inner surface of container for hot extrusion |
| JP2011121095A (en) * | 2009-12-11 | 2011-06-23 | Sumitomo Metal Ind Ltd | Lubricating glass-formed material, and method for manufacturing billet for tube-making by hot-extrusion |
| CN102974639A (en) * | 2012-12-25 | 2013-03-20 | 包进平 | Glass lubricating cushion for hot extrusion and capable of reducing extrusion force |
| CN105642690A (en) * | 2014-11-28 | 2016-06-08 | 财团法人金属工业研究发展中心 | Method for manufacturing steel section, extrusion device and steel extrusion ingot |
| CN113245391A (en) * | 2021-06-07 | 2021-08-13 | 青海中钛青锻装备制造有限公司 | Lubricating device for extruded pipe |
| CN113245391B (en) * | 2021-06-07 | 2023-05-16 | 青海中钛青锻装备制造有限公司 | Lubrication device for extruded pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3097359B2 (en) | 2000-10-10 |
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