JPS63278609A - Manufacture of special-shaped pipe by hot extrusion - Google Patents
Manufacture of special-shaped pipe by hot extrusionInfo
- Publication number
- JPS63278609A JPS63278609A JP10982087A JP10982087A JPS63278609A JP S63278609 A JPS63278609 A JP S63278609A JP 10982087 A JP10982087 A JP 10982087A JP 10982087 A JP10982087 A JP 10982087A JP S63278609 A JPS63278609 A JP S63278609A
- Authority
- JP
- Japan
- Prior art keywords
- billet
- holes
- thermal expansion
- columnar
- manufacture
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000001192 hot extrusion Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、長さ方向に平行に複数の孔を有する金属管、
あるいは偏芯した孔を有する金属管などの異形管を熱間
押出加工により製造する方法に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a metal tube having a plurality of holes parallel to its length,
Alternatively, the present invention relates to a method of manufacturing a deformed tube such as a metal tube having an eccentric hole by hot extrusion.
第３図（ａ）に示すような長さ方向に平行に複数の孔を
有する異形管は、複数の液体や気体を送る場合などに使
用される。従来このような異形管を製造するには、丸棒
をドリル穿孔し、さらに、必要に応じて冷間引抜加工し
て細径にする方法があるが、丸棒に平行に穿孔すること
が困難であり、さらに、長尺材の製造ができないという
問題がある。また、第３図（ｂ）に示すような偏芯した
孔を有する異形管は、熱間押出加工等により製造され、
これを切断して偏芯カムに使用されるが、孔の位置の精
度に問題があり、また、押出材の反りや曲りなど形状不
良等にも問題があった。A deformed tube having a plurality of holes parallel to its length as shown in FIG. 3(a) is used when sending a plurality of liquids or gases. Conventionally, to manufacture such irregularly shaped pipes, there is a method of drilling a round bar and then cold-drawing it if necessary to make it smaller in diameter, but it is difficult to drill holes parallel to the round bar. Furthermore, there is a problem that it is not possible to manufacture long materials. In addition, a deformed tube having an eccentric hole as shown in FIG. 3(b) is manufactured by hot extrusion, etc.
This is cut and used for eccentric cams, but there are problems with the accuracy of the hole positions, and there are also problems with shape defects such as warping and bending of the extruded material.
本発明は、長さ方向に平行に複数の孔を有する異形管、
あるいは偏芯した孔を有する異形管を、歩留まり良く、
精度良く、かつ能率的に製造することを目的とする。The present invention provides a deformed tube having a plurality of holes parallel to the length direction,
Alternatively, we can produce irregularly shaped tubes with eccentric holes with good yield.
The purpose is to manufacture with high precision and efficiency.
ｃ問題点を解決するための手段・作用〕本発明は、円柱
形ビレットの長さ方向に該ビレットよりも熱膨脹率の大
きい材料からなる装填材を嵌合させて複合ビレットとな
し、該複合ビレットを加熱して熱間押出加工し、冷却後
の押出材から前記装填材を分離除去することを特徴とす
る特以下に、長さ方向に２個の孔を有する異形管の製造
を例として本発明を説明する。Means/effect for solving problem C] The present invention provides a composite billet by fitting a charging material made of a material with a higher coefficient of thermal expansion than the billet in the length direction of a cylindrical billet. In this article, we will take as an example the manufacture of a deformed tube having two holes in the length direction. Explain the invention.
第１図に示すように、円柱形ビレット１の長さ方向に孔
をあけ、該孔に、円柱形ビレット１よりも熱膨脹率の大
きい材料からなる装填材２を嵌合させて複合ビレット３
となし、これを加熱し、第２図のようにコンテナー５内
に挿入し、ステム６によりダイス７を通して熱間押出加
工し、冷却後の押出材８から装填材２を分離除去する。As shown in FIG. 1, a hole is made in the length direction of a cylindrical billet 1, and a charging material 2 made of a material having a higher coefficient of thermal expansion than that of the cylindrical billet 1 is fitted into the hole to form a composite billet 3.
This is then heated, inserted into a container 5 as shown in FIG. 2, hot extruded through a die 7 using a stem 6, and the charge material 2 is separated and removed from the extruded material 8 after cooling.
複合ビレット３を押出す際には、押出トップ側に装填材
２が露出していると、装填材２と円柱形ビレット１の変
形抵抗のアンバランスにより、異常変形するおそれがあ
るので、第１図（ｂ）のように円柱形ビレット１の孔を
貫通させないか、または第１図（ｃ）のようにトップ側
にＭ４をするのが望ましい。When extruding the composite billet 3, if the charging material 2 is exposed on the extrusion top side, there is a risk of abnormal deformation due to an imbalance in the deformation resistance between the charging material 2 and the cylindrical billet 1. It is preferable that the hole in the cylindrical billet 1 not be penetrated as shown in FIG. 1(b), or that M4 be formed on the top side as shown in FIG. 1(c).
また、複合ビレット３の押出ボトム側に装填材２が露出
していると、複合ビレット３の加熱時あるいは搬送時に
装填材２がずれるおそれがあるので、第１図（ｂ） 、
（ｃ）のようにボトム側にも蓋４をするのが望ましい
。In addition, if the charging material 2 is exposed on the extrusion bottom side of the composite billet 3, there is a risk that the charging material 2 may be displaced during heating or transportation of the composite billet 3.
It is desirable to cover the bottom side with a lid 4 as shown in (c).
熱間押出後に押出材８から装填材２を分離除去するには
、押出材８を矯直したのち装填材２をつかんで引き出す
手段などを用いる。この際、押出材８の外周を加熱する
と分離しやすい。また、円柱形ビレッ斗１に装填材２を
嵌合させる際に間にガラス質の粉末やクロスをはさんで
おくと、両者の分離が容易となる。In order to separate and remove the charging material 2 from the extruded material 8 after hot extrusion, a means for straightening the extruded material 8 and then grasping and pulling out the charging material 2 is used. At this time, heating the outer periphery of the extruded material 8 facilitates separation. Moreover, when the charging material 2 is fitted into the cylindrical billet 1, if glass powder or cloth is sandwiched therebetween, the two can be easily separated.
装填材２は、円柱形ビレット１よりも熱膨脹率の大きい
材料とする。これは、押出材８が冷却されたとき、円柱
形ビレット１の母材よりも装填材２の収縮量を大きくし
て、分離し易くするためである。たとえば普通鋼を母材
とする場合は、装填材２として母材より熱膨脹率の大き
いステンレス鋼などの合金鋼を用いる。The charging material 2 is made of a material having a higher coefficient of thermal expansion than the cylindrical billet 1. This is because when the extruded material 8 is cooled, the amount of shrinkage of the charging material 2 is greater than that of the base material of the cylindrical billet 1, so that it can be easily separated. For example, when ordinary steel is used as the base material, alloy steel such as stainless steel, which has a larger coefficient of thermal expansion than the base material, is used as the charging material 2.
装填材２を分離で得られた異形管は通常の精整工程を経
て製品となる。また、この製品をさらに引抜きあるいは
絞り加工して、より細径の異形管とすることもできる。The irregularly shaped tube obtained by separating the charging material 2 is made into a product through a normal refining process. In addition, this product can be further drawn or drawn to produce a deformed tube with a smaller diameter.
５４５Ｃ（普通鋼）からなる直径１７０ｍ、長さ４００
Ｕの円柱形ビレットの長さ方向に平行に直径４０１ｍ（
７）孔を２個、２０ｍｍ間隔であけ、５ＵＳ３０４ （
ステンレス鋼）からなる装填材にウィンドウガラス製の
クロスを巻きつけたものを嵌合させ、両端に３４５Ｇの
蓋をして加熱し、直径５０＋＋＋ｍに熱間押出加工した
。Made of 545C (common steel), diameter 170m, length 400m
Parallel to the length direction of the cylindrical billet U with a diameter of 401 m (
7) Drill two holes at 20mm intervals and use 5US304 (
A charging material made of stainless steel) was fitted with a window glass cloth wrapped around it, and both ends were covered with 345G lids, heated, and hot extruded to a diameter of 50+++ m.
これをローラー矯正で真直にし、引張矯正機で装填材を
抜き出した。その結果、直径５０ｆｌ、長さ約５ｍ、孔
の直径１２鶴、孔の間隔５鶴の２孔異形管が得られた。This was straightened by roller straightening, and the charging material was extracted using a tensile straightening machine. As a result, a two-hole irregular tube with a diameter of 50 fl, a length of about 5 m, a hole diameter of 12 holes, and a hole spacing of 5 holes was obtained.
孔の位置およびサイズは設計どおりで長さ方向の変動も
なく、押出後の形状も良好であった。The position and size of the holes were as designed, there was no variation in the length direction, and the shape after extrusion was also good.
本発明によれば、マンドレルを使用することなく異形管
の熱間押出加工ができるので、複数の孔を有する管や、
断面内で偏芯した孔を有する管などの異形管を、孔の位
置の精度よく、かつ形状もよく製造できる。また、従来
法のようなドリル穿孔が不要なので、高歩留まり高能率
で長尺の異形管を製造することができる。According to the present invention, hot extrusion processing of deformed tubes can be performed without using a mandrel, so that tubes having multiple holes,
It is possible to manufacture irregularly shaped tubes, such as tubes having holes that are eccentric in their cross section, with good hole position accuracy and good shape. Further, since drilling unlike the conventional method is not required, long irregularly shaped pipes can be manufactured with high yield and high efficiency.
第１図および第２図は本発明法を説明する図、第３図は
本発明の対象とする異形管の例を示す図である。
１−円柱形ビレット ２；装填材
３：複合ビレット ４：蓋
８：押出材1 and 2 are diagrams for explaining the method of the present invention, and FIG. 3 is a diagram showing an example of a deformed tube to which the present invention is applied. 1-Cylindrical billet 2; Loading material 3: Composite billet 4: Lid 8: Extruded material
Claims (1)
の大きい材料からなる装填材を嵌合させて複合ビレット
となし、該複合ビレットを加熱して熱間押出加工し、冷
却後の押出材から前記装填材を分離除去することを特徴
とする熱間押出による異形管の製造法。A charging material made of a material with a higher coefficient of thermal expansion than the billet is fitted in the length direction of the cylindrical billet to form a composite billet, the composite billet is heated and hot extruded, and the extruded material after cooling is A method for producing a deformed tube by hot extrusion, characterized in that the loading material is separated and removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10982087A JPS63278609A (en) | 1987-05-07 | 1987-05-07 | Manufacture of special-shaped pipe by hot extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10982087A JPS63278609A (en) | 1987-05-07 | 1987-05-07 | Manufacture of special-shaped pipe by hot extrusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63278609A true JPS63278609A (en) | 1988-11-16 |
Family
ID=14520035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10982087A Pending JPS63278609A (en) | 1987-05-07 | 1987-05-07 | Manufacture of special-shaped pipe by hot extrusion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63278609A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337765C (en) * | 2005-12-28 | 2007-09-19 | 西北有色金属研究院 | Method for extruding pig metal to steel bar |
-
1987
- 1987-05-07 JP JP10982087A patent/JPS63278609A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337765C (en) * | 2005-12-28 | 2007-09-19 | 西北有色金属研究院 | Method for extruding pig metal to steel bar |
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