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 |
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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 |
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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 |
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1985
- 1985-09-11 JP JP60201313A patent/JPS6261719A/en active Granted
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JP2005351808A (en) * | 2004-06-11 | 2005-12-22 | Nikon Corp | Inspection device of grindstone particle dispersed state |
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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 |
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JPH025485B2 (en) | 1990-02-02 |
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