JPS6261719A - Composite billet for isostatic extruding of internal coating composite pipe - Google Patents
Composite billet for isostatic extruding of internal coating composite pipeInfo
- Publication number
- JPS6261719A JPS6261719A JP60201313A JP20131385A JPS6261719A JP S6261719 A JPS6261719 A JP S6261719A JP 60201313 A JP60201313 A JP 60201313A JP 20131385 A JP20131385 A JP 20131385A JP S6261719 A JPS6261719 A JP S6261719A
- Authority
- JP
- Japan
- Prior art keywords
- billet
- pipe
- mandrel
- plug
- composite
- 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
Landscapes
- Extrusion Of Metal (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は内面被覆複合管の静水圧押出し用複合ビレッ
トに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a composite billet for hydrostatic extrusion of internally coated composite pipes.
［従来の技術及び発明が解決しようとする問題点］従来
、第３図に示すような内面に被覆層７を有する金属複合
管を静水圧押出し法により製造する場合、押出しビレッ
トとしては断面構成が製品と略同じ複合ビレットを作成
しているが、押出し開始の際に油等の圧力媒体が複合ビ
レットの孔とマンドレルとの間隙から流出して押出し不
能に陥ることを防止するため、第２図に示すように複合
ビレットの先端部１１の外径を本体部１２の外径より小
さくなると同時にマンドレル５の径よりも若干小さくし
て仕上げ、マンドレル５を挿入する際にいわゆる「締り
ばめ」の状態で嵌合するようにしていた。[Prior art and problems to be solved by the invention] Conventionally, when manufacturing a metal composite pipe having a coating layer 7 on the inner surface as shown in FIG. A composite billet that is almost the same as the product is being created, but in order to prevent pressure media such as oil from flowing out from the gap between the holes in the composite billet and the mandrel at the start of extrusion, making extrusion impossible, the method shown in Figure 2 is used. As shown in the figure, the outer diameter of the tip 11 of the composite billet is made smaller than the outer diameter of the main body 12 and at the same time slightly smaller than the diameter of the mandrel 5, so that when inserting the mandrel 5, a so-called "interference fit" is achieved. I tried to make sure that they fit together in the same condition.
しかるに、複合ビレットの被覆用パイプ２が薄い場合あ
るいは軟質である場合には、マンドレル５挿入の際に硬
質のマンドレル５によってビレット先端の縮径部のｍ覆
用パイプ２が局部的なしごき加工を受けて破断ないしは
亀裂を生ずることが多い。こうして被覆用パイプ２が破
断すると、圧力媒体がその部分から流出して押出し不能
となるのみならず、再び被覆用パイプ２の加工を行わな
ければならず、その経済的損失は極めて大きい。However, when the covering pipe 2 of the composite billet is thin or soft, when the mandrel 5 is inserted, the hard mandrel 5 may cause the m-covering pipe 2 at the reduced diameter portion at the tip of the billet to undergo local ironing. This often results in breakage or cracking. When the covering pipe 2 is broken in this way, not only does the pressure medium flow out from that part and extrusion becomes impossible, but also the covering pipe 2 has to be processed again, resulting in an extremely large economic loss.
そこで、かねてよりマンドレル５挿入の際に被覆用バイ
ブ２を損傷することなく、しかも押出し開始の際にビレ
ット先端部１１とマンドレル５゛間の圧力媒体に対する
シールが十分に達成されるように、複合ビレットの構造
を改善することが望まれていた。Therefore, in order to avoid damaging the coating vibrator 2 when inserting the mandrel 5 and to achieve a sufficient seal against the pressure medium between the billet tip 11 and the mandrel 5 at the start of extrusion, we have developed a composite material. It was desired to improve the billet structure.
したがって、この発明の目的とするところは、前記した
従来技術の欠点を解消し、複合ビレットとマンドレル間
で圧力媒体の漏れを生ずることなく押出し開始の可能な
複合とレット構造を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to overcome the drawbacks of the prior art described above and to provide a composite billet structure that allows extrusion to begin without leakage of pressure medium between the composite billet and the mandrel. .
なお、静水圧押出し法による複合管の製造に関する従来
例としては特開昭４７−３１８６２号があるが、これは
圧力媒体がビレットのケースと中空芯との間に流入する
のを防止し、かつダイスの出口から漏れるのを防止した
ものであり、マンドレル挿入の條の被覆用パイプの損傷
を防止することを目的としたものではない。その他、ビ
レットの静水圧押出し技術に関する従来例として特開昭
４８−５５１６７号、同４９−６３６４１号、同５７−
１１７１９号等が知られているが、これらはいずれも単
一材、又は芯材の外側に被覆材を設けてなる複合材から
成るビレットの押出し加工に関するものであって、マン
ドレルを使用する内面被覆複合管用の複合ビレットを対
象としたものではない。A conventional example of manufacturing a composite pipe by the hydrostatic extrusion method is Japanese Patent Application Laid-Open No. 47-31862, which prevents pressure medium from flowing between the billet case and the hollow core, and The purpose is to prevent leakage from the exit of the die, and is not intended to prevent damage to the covering pipe when inserting the mandrel. Other conventional examples of billet hydrostatic extrusion technology include JP-A-48-55167, JP-A-49-63641, and JP-A-57-
No. 11719, etc. are known, but these all relate to extrusion processing of billets made of a single material or a composite material with a coating material provided on the outside of a core material, and inner coating using a mandrel. It is not intended for composite billets for composite pipes.
［問題点を解決するための手段及び作用］この発明は、
ビレットの先端部を略円錐状の単一金属製プラグ３とし
、該プラグ３の後端面（すなわち外径の大きい側）に被
覆用バイブ２を接着し、その際該バイブ２の内径を前記
プラグ３のマンドレル５挿入用の孔より大きくし、その
被覆用パイプ２の周囲に基材となる中空ビレット１を配
設し、押出し後端側の中空ビレットと被覆用パイプの間
に溶接又はろう付け６′による気密処理を施すと共にそ
れらの後端面にストッパ４を接着して複合ビレットを構
成したことにより、この複合ビレットにマンドレル５を
挿入した際に被覆用バイブ２のマンドレル５によるしご
き加工に起因する破断が防止されると共にビレット先端
のプラグ部分におけるシールが確保される。[Means and effects for solving the problems] This invention has the following features:
The tip of the billet is a substantially conical single metal plug 3, and a coating vibrator 2 is adhered to the rear end surface (i.e., the side with a larger outer diameter) of the plug 3. At this time, the inner diameter of the vibrator 2 is The hollow billet 1 is made larger than the hole for inserting the mandrel 5 in step 3, and the hollow billet 1 serving as a base material is arranged around the covering pipe 2, and welded or brazed between the hollow billet and the covering pipe on the rear end of extrusion. 6' and bonding the stopper 4 to their rear end surfaces to form a composite billet. This prevents breakage and ensures a seal at the plug portion at the tip of the billet.
［実施例］
実施例１
内面Ｃｕ被覆Ｔｉ管押出し用に第１図に示す構造の複合
ビレットを作製した。すなわち、複合ビレット先端のプ
ラグ３は截頭円錐状でＣｕ製とし、その軸心に径２８．
７ａｍ、長さ約５０ｍのマンドレル挿入用の孔を有し、
その後端面に内径３１゜５履、肉厚０．５ｍ、長さ９０
０ａｗｚのＣｕ管２をその軸心がプラグ孔の軸心に一致
するように溶接し、その周囲に内径３３．Ｏ顛、外径１
６０ａｓ＋。[Examples] Example 1 A composite billet having the structure shown in FIG. 1 was prepared for extrusion of a Ti tube with an internal Cu coating. That is, the plug 3 at the tip of the composite billet has a truncated conical shape and is made of Cu, and has a diameter of 28 mm at its axis.
It has a hole for inserting a mandrel with a length of 7 am and a length of approximately 50 m.
The rear end has an inner diameter of 31°5, a wall thickness of 0.5m, and a length of 90mm.
A 0 awz Cu tube 2 is welded so that its axis coincides with the axis of the plug hole, and an inner diameter of 33. O size, outer diameter 1
60as+.
長さ９００ｍ＋のＴｉ゛製中空中空ビレット１設した。One hollow billet made of Ti with a length of 900m+ was installed.
そして先端側のＣＵ製プラグとＴＩＪビレット。And a CU plug and TIJ billet on the tip side.
及び後端側のＴｉ製ビレットとＣｕ管とはそれぞれ溶接
６，６′により接着した。こうして作製した複合ビレッ
トの孔に外径３０．５ｍｍの工具鋼製マンドレル５を第
１図にしめすように挿入した。The Ti billet on the rear end side and the Cu tube were bonded together by welding 6 and 6', respectively. A tool steel mandrel 5 having an outer diameter of 30.5 mm was inserted into the hole of the composite billet thus produced as shown in FIG.
ただしその際、ＣＵ製プラグ３の孔径はマンドレル５の
径より若干小さいため、この部分はマンドレル５の先端
に形成したテーパ部を利用してマンドレル５をプラグ孔
に強制圧入した。However, at this time, since the hole diameter of the CU plug 3 was slightly smaller than the diameter of the mandrel 5, the mandrel 5 was forcibly press-fitted into the plug hole using the taper portion formed at the tip of the mandrel 5.
こうして作製された複合ビレット／マンドレルのセット
を孔径４０．５ＩＩＲのダイス（図示せず）上に配置し
、ひまし油を圧力媒体として押出し温度６００℃で静水
圧押出しを行ったところ、約１３、０ＯＯｋａ／ｃｍ２
の押出し圧力で外径４０゜５ ｔｔｍ 、肉厚５．０Ｍ
１の内面にＣｕが被覆されたＴｉ管を支障なく押し出す
ことができた。The thus prepared composite billet/mandrel set was placed on a die (not shown) with a hole diameter of 40.5 IIR, and hydrostatic extrusion was performed at an extrusion temperature of 600°C using castor oil as a pressure medium, resulting in approximately 13.0 OOka/ cm2
Outer diameter 40゜5 ttm, wall thickness 5.0M with extrusion pressure of
The Ti tube whose inner surface was coated with Cu could be extruded without any problem.
実施例２
内面Ｃｕ被覆ジルカロイ管押出し用に第１図に示す構造
の複合ビレットを作製した。すなわち、複合ビレット先
端のプラグ３は截頭円錐状でＣＬＪ製とし、その軸心に
径２４．７１ＩＩＩｍ、長さ約５０順のマンドレル５挿
入用の孔を有し、その後端面に内径２７Ｍ、肉厚０．５
ｇ＋、長さ９００ｒＩＩＩＲのＣＬＪ管２をその軸心が
プラグ孔の軸心に一致するように溶接し、その周囲に内
径２９＋１１１．外径１６０ＩｖＲ。Example 2 A composite billet having the structure shown in FIG. 1 was prepared for extrusion of a Zircaloy tube whose inner surface was coated with Cu. That is, the plug 3 at the tip of the composite billet has a truncated conical shape and is made of CLJ, and has a hole at its axis for inserting a mandrel 5 with a diameter of 24.71 m and a length of approximately 50 m, and a hole with an inner diameter of 27 m and a wall on its rear end surface. Thickness 0.5
g+, a CLJ pipe 2 with a length of 900rIIIR is welded so that its axis coincides with the axis of the plug hole, and an inner diameter of 29+111. Outer diameter 160IvR.
長さ９００ｍのジルカロイ−２合金（１，５％５ｎ−０
，１５％Ｆｅ−０，１０％ｃｒ−ｏ、０５％Ｎ＋−残部
Ｚｒ）製の中空ビレット１を配設した。そして先端側の
Ｃｕ製プラグとジルカロイ−２合金製ビレット、及び後
端側のジルカロイ−２合金製ビレットとＣｕ管とはそれ
ぞれ特殊ろう付け６．６−により接着した。こうして作
製した複合ビレットの孔に外径２５．５ｊＩＩＩの工具
構成マンドレル５を第１図に示すように挿入した。ただ
しその際実施例１と同様に、Ｃｕ製プラグ３の孔径はマ
ンドレル５の径より若干小さいため、この部分はマンド
レル５の先端に形成したテーパ部を利用してマンドレル
５をプラグ孔に強制圧入した。Zircaloy-2 alloy (1,5% 5n-0) with a length of 900 m
, 15% Fe-0, 10% cr-o, 05% N + - balance Zr). Then, the Cu plug and the Zircaloy-2 alloy billet on the front end side, and the Zircaloy-2 alloy billet and the Cu tube on the rear end side were each bonded by special brazing 6.6-. A tool-forming mandrel 5 having an outer diameter of 25.5jIII was inserted into the hole of the composite billet thus produced as shown in FIG. However, in this case, as in Example 1, the hole diameter of the Cu plug 3 is slightly smaller than the diameter of the mandrel 5, so the mandrel 5 is forcibly press-fitted into the plug hole using the tapered part formed at the tip of the mandrel 5. did.
こうして作製された複合ビレット／マンドレルのセット
を孔径３１．５ＪＩｌｌのダイス（図示せず）上に設置
し、ひまし油を圧力媒体として押出し温度６００℃で静
水圧押出しを行ったところ、約１３．０００にｇ／ｃｍ
２の押出し圧力で外径３１゜５ ｍ 、内径３．０層ｍ
の内面にＣｕが被覆されたジルカロイ−２管を支障なく
押し出すことができた。The thus prepared composite billet/mandrel set was placed on a die (not shown) with a hole diameter of 31.5 JIll, and hydrostatic extrusion was performed at an extrusion temperature of 600°C using castor oil as a pressure medium. g/cm
Extrusion pressure of 2: outer diameter 31゜5 m, inner diameter 3.0 layer m
The Zircaloy-2 tube whose inner surface was coated with Cu could be extruded without any problem.
［比較例１
内面Ｃｕ被覆ジルカロイ管押出し用に従来技術に基づき
第２図に示す構造の複合ビレットを作製した。すなわち
、円錐状の先端部１１の孔径２５．７層９本体部１２の
孔径２９履、外径１６０ａｗ、長さ９００ａ１１のジル
カロイ−２（上記と同じ組成）製の中空ビレット１の孔
内に外径２３．５＃Ｉ１．肉厚０．５層ｇｒのＣｕ管を
該ビレット１の全長に亘って挿入し、ラバープレスによ
り拡管し、中、空ビレット１の内面に密着させた。前後
端でのＣＩＪとジルカロイ−２の接着は特殊ろう付け６
．６′により実施した。こうして作製した複合ビレット
の孔に外径２５．５履の工具鋼製マンドレル５を第２図
に示すように挿入し、次いで孔径３１．５層ｍのダイス
（図示せず）を使用し、ひまし油を圧力媒体として押出
し温度６００℃で静水圧押出しを試みたが、マンドレル
／複合ビレット間より圧力媒体が漏れ出し、押出し不可
能であった。その後マンドレル５を抜き取り、複合ビレ
ットの先端部を点検したところ、Ｃｕ層の一部に亀裂が
生じていた。[Comparative Example 1] A composite billet having the structure shown in FIG. 2 was produced based on a conventional technique for extrusion of a Zircaloy tube whose inner surface was coated with Cu. That is, a hollow billet 1 made of Zircaloy-2 (same composition as above) has a hole diameter of 25.7 in the conical tip 11, a hole diameter of 29 in the layer 9, a hole diameter of 29 in the main body 12, an outer diameter of 160 aw, and a length of 900 a. Diameter 23.5#I1. A Cu tube with a wall thickness of 0.5 layer gr was inserted over the entire length of the billet 1, expanded by a rubber press, and brought into close contact with the inner surface of the hollow billet 1. Special brazing 6 is used to bond CIJ and Zircaloy-2 at the front and rear ends.
．． 6'. A tool steel mandrel 5 with an outer diameter of 25.5 m is inserted into the hole of the composite billet thus prepared as shown in Fig. 2, and then, using a die (not shown) with a hole diameter of 31.5 m, Isostatic pressure extrusion was attempted at an extrusion temperature of 600°C using the pressure medium as a pressure medium, but the pressure medium leaked from between the mandrel/composite billet and extrusion was impossible. Thereafter, when the mandrel 5 was removed and the tip of the composite billet was inspected, cracks had occurred in a portion of the Cu layer.
そこで、ｃｕｔＶＢ肴後の中空ビレット先端部１１の孔
径を順次拡大して行ったところ、孔径２５．１層ｍ＋で
Ｃｕ管２の亀裂生成はなくなったが、マンドレル先端部
において複合ビレットによる十分な緊縛力が得られず、
マンドレル／複合ビレット間で圧力媒体が漏れ出し、押
出し不可能であった。Therefore, when the hole diameter of the hollow billet tip 11 after cutVB was gradually enlarged, cracks were no longer generated in the Cu tube 2 at a hole diameter of 25.1 m+, but the composite billet provided sufficient restraint at the tip of the mandrel. I can't get strength,
Pressure medium leaked between the mandrel/composite billet and extrusion was impossible.
［変形例］
上記の実施例では内面に単一の被覆層７を有する複合管
の静水圧押出し用複合ビレットについて説明したが、こ
の発明は第４図に示すように内面被覆層７及び外面被覆
層８を有する複合管あるいは第５図に示すように内面に
２層の被覆層７゜７−を有する複合管の静水圧押出し用
複合ビレットについても適用されるものである。[Modification] In the above embodiment, a composite billet for hydrostatic extrusion of a composite pipe having a single coating layer 7 on the inner surface was explained, but the present invention has a single coating layer 7 on the inner surface and an outer coating layer 7 on the inner surface as shown in FIG. The present invention is also applicable to a composite billet for hydrostatic extrusion of a composite pipe having a layer 8 or a composite pipe having two coating layers 7-7 on the inner surface as shown in FIG.
［発明の効果〕
以上説明したようにこの発明によれば、マンドレル挿入
時の内面被覆用パイプの破断が防止され、従って押出し
開始時の圧力媒体の漏れが防止され押出し成功率が著し
く上昇し、かつ従来構造の複合ビレットと比較して内面
被覆用パイプとして薄肉のものあるいは軟質の材料を使
用することができる。[Effects of the Invention] As explained above, according to the present invention, breakage of the inner surface coating pipe when inserting the mandrel is prevented, and therefore, leakage of the pressure medium at the start of extrusion is prevented, and the extrusion success rate is significantly increased. In addition, compared to the composite billet of conventional structure, it is possible to use a thinner walled pipe or a softer material for the inner surface coating pipe.
第１図はこの発明に係る複合ビレットの一実施例を示す
断面図、第２図は従来の複合ビレットを示す断面図、第
３図は内面に単一の被覆層を有する複合管を示す断面図
、第４図は内面及び外面に被覆層を有する複合管を示す
断面図、第５図は内面に２層の被覆層を有する複合管を
示す断面図である。
１・・・中空ビレット、１１・・・先端部。
１２・・・本 体 部、２・・・被覆用パイプ。
３・・・プ ラ グ、 ４・・・ストッパ。
５・・・マンドレル、５１・・・テーパ部。
６．６′・・・溶接又はろう付は部。
７．７′・・・内面被覆層。
８・・・外面被覆層。
代理人 弁理士 佐 藤 不二雄
冗 １ 図
％ ２２１
Ｎ ３ 図 翅４１２１
１２：本俸部
Ｚ Ｓ ｓＲ用／守イア。
５ニア゛うγ
４ コ スト、ハ１
Ｓ：マシドいし
Ｓｌ：テーパ・都
８二外面微ｊＩ漫
苑 ５ ロFig. 1 is a sectional view showing an embodiment of a composite billet according to the present invention, Fig. 2 is a sectional view showing a conventional composite billet, and Fig. 3 is a sectional view showing a composite pipe having a single coating layer on the inner surface. 4 are cross-sectional views showing a composite tube having a coating layer on the inner and outer surfaces, and FIG. 5 is a cross-sectional view showing a composite tube having two coating layers on the inner surface. 1...Hollow billet, 11...Tip part. 12... Main body part, 2... Covering pipe. 3...Plug, 4...Stopper. 5... Mandrel, 51... Taper part. 6.6'...Welding or brazing is part. 7.7'...Inner coating layer. 8...Outer surface coating layer. Agent Patent Attorney Fujio Sato 1 Figure % 221 N 3 Figure 4121 12: Salary Department Z S sR / Guardian. 5 Near γ 4 Cost, C 1 S: Masido I Sl: Taper・To 82 External Fine JI Manen 5 Ro
Claims (1)
し用ダイスに適合するテーパ面を有する略円錐状の単一
金属製プラグの後端面に該プラグの孔径より大きい内径
を有する被覆用パイプを該プラグと同一軸心に接着し、
この被覆用パイプの周囲に基材となる中空ビレットを配
設し、押出し後端側の中空ビレットと被覆用パイプの間
に気密処理を施すと共にそれらの後端面にストッパを接
着してなる内面被覆複合管の静水圧押出し用複合ビレッ
ト。(1) A covering pipe having an inner diameter larger than the hole diameter of the plug is attached to the rear end surface of a substantially conical single metal plug that has a mandrel insertion hole in the shaft center and a tapered surface that fits the extrusion die. Glue on the same axis as the plug,
A hollow billet serving as a base material is arranged around this covering pipe, and an airtight treatment is performed between the hollow billet on the rear end of extrusion and the covering pipe, and a stopper is bonded to the rear end surface of the hollow billet to form an inner coating. Composite billet for isostatic extrusion of composite pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60201313A JPS6261719A (en) | 1985-09-11 | 1985-09-11 | Composite billet for isostatic extruding of internal coating composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60201313A JPS6261719A (en) | 1985-09-11 | 1985-09-11 | Composite billet for isostatic extruding of internal coating composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6261719A true JPS6261719A (en) | 1987-03-18 |
| JPH025485B2 JPH025485B2 (en) | 1990-02-02 |
Family
ID=16438937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60201313A Granted JPS6261719A (en) | 1985-09-11 | 1985-09-11 | Composite billet for isostatic extruding of internal coating composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6261719A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546704A (en) * | 1994-03-24 | 1996-08-20 | Nifco Inc. | Glass holder |
| CN103737263A (en) * | 2013-12-25 | 2014-04-23 | 西安西工大超晶科技发展有限责任公司 | Roller expansion type mechanical plug for heat transfer tube of steam generator and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155089A (en) * | 1998-11-20 | 2000-06-06 | Murata Mfg Co Ltd | Dispersibility evaluating method |
| JP2005351808A (en) * | 2004-06-11 | 2005-12-22 | Nikon Corp | Inspection device of grindstone particle dispersed state |
-
1985
- 1985-09-11 JP JP60201313A patent/JPS6261719A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155089A (en) * | 1998-11-20 | 2000-06-06 | Murata Mfg Co Ltd | Dispersibility evaluating method |
| JP2005351808A (en) * | 2004-06-11 | 2005-12-22 | Nikon Corp | Inspection device of grindstone particle dispersed state |
Non-Patent Citations (1)
| Title |
|---|
| JPN6016043169; 日本粉体工業技術協会 編: 粉体混合技術 , 20011102, ｐ．２０-２３ * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546704A (en) * | 1994-03-24 | 1996-08-20 | Nifco Inc. | Glass holder |
| CN103737263A (en) * | 2013-12-25 | 2014-04-23 | 西安西工大超晶科技发展有限责任公司 | Roller expansion type mechanical plug for heat transfer tube of steam generator and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH025485B2 (en) | 1990-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6261719A (en) | Composite billet for isostatic extruding of internal coating composite pipe | |
| JPS6045991B2 (en) | Manufacturing method of tubular joint parts | |
| JP3596804B2 (en) | Elbow-shaped fluid fitting and manufacturing method thereof | |
| US3699636A (en) | Metal bonding process | |
| JPH0432695A (en) | Sealing up of heat pipe | |
| JPS58218391A (en) | Circumferential welding method of joint of steel pipes | |
| JPH05264185A (en) | Heat pipe container | |
| JP4006307B2 (en) | Clad material indirect extrusion method | |
| JPH04727B2 (en) | ||
| JPH05200432A (en) | Manufacture of double tube | |
| JPH10176775A (en) | Pipe coupling structure and connection method thereof | |
| JP3310756B2 (en) | Manufacturing method of high strength corrosion resistant branch pipe | |
| JP2005104287A (en) | Bicycle frame pipe and its processing method | |
| JPH02142684A (en) | Manufacture of dissimilar metallic pipe joint | |
| JPS6076290A (en) | Production of clad steel pipe | |
| JP3599227B2 (en) | Elbow-shaped fluid fitting and manufacturing method thereof | |
| JP3143834B2 (en) | Piping joint structure | |
| JPH05269622A (en) | Method for cutting thread on outer circumferential surface of pipe end | |
| JPS5822891A (en) | Fitting of heat pipe | |
| JPS5813488A (en) | Production of metal clad ceramic pipe | |
| JP3456842B2 (en) | Method for producing rapidly solidified foil for frusto-conical ring joining material and production roll | |
| JP3456838B2 (en) | Method and apparatus for producing rapidly solidified foil for frusto-conical ring joining material and production nozzle | |
| JPS62214165A (en) | Manufacture of composite wire | |
| JP2527574B2 (en) | Inner clad nickel alloy tubular product manufacturing method | |
| JPH06182858A (en) | Production of inclined pipe |