JPH0366063B2 - - Google Patents
Info
- Publication number
- JPH0366063B2 JPH0366063B2 JP10446585A JP10446585A JPH0366063B2 JP H0366063 B2 JPH0366063 B2 JP H0366063B2 JP 10446585 A JP10446585 A JP 10446585A JP 10446585 A JP10446585 A JP 10446585A JP H0366063 B2 JPH0366063 B2 JP H0366063B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- narrow gap
- water
- deformation prevention
- prevention material
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 25
- 230000002265 prevention Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002195 soluble material Substances 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Description
〔産業上の利用分野〕
本発明は狭間隙を有する構造物の製造方法に関
し、特に、溶接により高精度で組立てて製造する
方法に係る。
〔従来の技術〕
例えばコンプレツサ羽車等のような狭間隙の空
間を必要とする構造物を製作する一つの方法とし
て、放電加工により狭間隙部分をくりぬく方法が
ある。しかし、この方法では多大の時間を要し、
且つ電極消耗を生じてコスト高になるため、溶接
による組立て製造方法も従来行なわれている。
従来行なわれている狭間隙部材の溶接組立て方
法は、第２図に示すように、リブ２を備えた下板
１上に開先４を設けた上板３を重ね合せ、開先部
を溶接により接合して組立てるものである。
〔発明が解決しようとする問題点〕
上記従来行なわれている狭間隙部材の溶接組立
て方法では、第３図Ａの溶接前における初期間隙
高さH0が、溶接後には同図Ｂに示すようにH1に
変化してしまう問題がある。これは溶接部５を形
成する際の溶接収縮によるものである。しかも、
溶接収縮の大きさは溶接条件の微少な変動でバラ
ツキを生じるため、精度の良い狭間隙を形成する
ことが極めて困難であつた。
この問題を回避するため、第４図に示すように
鉄片や固形セラミツク等の変形防止材８を間隙内
に挿入して溶接を行ない、溶接収縮を防止する方
法が考えられている。しかし、この場合には変形
防止材８が溶接収縮で圧縮され、組立て完了後に
これを取除くことが非常に困難になるという別の
問題を生じていた。
上記事情に鑑み、本発明は狭間隙空間を高精度
に維持して狭間隙部材の溶接組立てを行なうこと
を技術的課題とするものである。
〔問題点を解決するための手段〕
本発明による狭間隙部材の溶接組立て方法は、
狭間隙部材の空隙となる空間に予め水溶性材料ま
たは水崩壊性材料からなる変形防止材を充填する
と共に、該変形防止材の一部に貫通溝または貫通
孔を形成した上で溶接による組立てを行なつた
後、この組立てられた構造物を水中に浸漬するこ
とにより前記変形防止材を溶解除去するとを特徴
とするものである。
本発明で用いる変形防止材としては、例えば石
膏等のように流動状態で空隙内に充填でき、乾燥
まは効果剤の作用で硬化するものが望ましい。
また、本発明で前記変形防止剤に貫通溝または
貫通孔を形成するのは、溶接後に水中に浸漬して
変形防止材を除去する際に、水の浸透を容易にす
るためである。従つて、この貫通溝または貫通孔
の両端は解放されていなければならない。
〔作用〕
本発明の作用について、これを第２図〜第４図
の場合と同じ狭間隙部材の組立てに適用する一態
様と共に説明すれば次の通りである。
第１図Ａに示すように、まず下板１のリブ２で
仕切られる空間内に水溶性の変形防止材６を充填
し、更に該変形部材６に貫通溝７を形成する。変
形防止材６に石膏を用いる場合には、流動状態の
石膏を流し込んで硬化させる注型法により、貫通
溝７を同時に形成することも可能である。
この状態で第１図Ｂに示すように上板３の開先
を溶接し、溶接部５により一体化して狭間隙部材
の組立てを行なう。その際、変形防止材６の介在
によつて高さ方向の溶接収縮は完全に阻止され
る。また、この場合に変形防止材の両側に形成さ
れた貫通溝７は裏波形成のための空間として作用
する。
次いで、この溶接して組立てた狭間隙部材を水
中に浸漬すると、水は変形防止材６中に浸透し、
変形防止材６は溶解または崩壊により軟化して容
易に除去することができる。その際、貫通溝７が
ないと水が奥まで浸透するのに長時間を要するこ
とになるが、奥行き方向に貫通した溝７が存在す
るため水は容易かつ迅速に変形防止材６の奥まで
浸透するとができる。なお、図示のように変形防
止材６の表面に貫通溝７を設ける代りに、中央部
に貫通孔を設けても同様の作用が得られる。
〔実施例〕
実施例 １、２
第１図Ａ，Ｂに示した形状の下板１、リブ２及
び上板３（リブの厚さ５mm、リブの高さ８mm、リ
ブのピツチ50mm）を用い、奥行き150mmの狭間隙
が10個連なつた狭間隙部材の溶接組立てを行なつ
た。なお、これらの材質はクロム／モリブデン鋼
で、溶接方法としてはTIG溶接（余熱200℃）を
用いた。また、変形防止材６は市販の破壊石膏に
水50％を混練したもの、またはアルミナ粉末に炭
酸カリウム５％を混練したものを狭間空間内に流
し込み、２時間放置して固化した後に上板を外
し、深さ３mmの貫通溝７を加工して形成した。
比較例 １
変形防止材６を用いなかつた点を除き、実施例
と同じ方法で狭間隙部材の溶接組立てを行なつ
た。
比較例 ２、４
変形防止材６の表面に貫通溝７を形成しなかつ
た点を除き、実施例と同じ方法で狭間隙部材の溶
接組立てを行なつた。
上記実施例１、２および比較例１〜３の結果を
下記の第１表に示す。
[Industrial Field of Application] The present invention relates to a method of manufacturing a structure having a narrow gap, and particularly to a method of assembling and manufacturing a structure with high precision by welding. [Prior Art] One method of manufacturing a structure that requires a narrow gap space, such as a compressor impeller, is to hollow out the narrow gap part by electrical discharge machining. However, this method takes a lot of time and
In addition, since the electrodes are worn out and the cost is high, welding has been conventionally used as an assembly manufacturing method. The conventional method of welding and assembling narrow gap members is to stack an upper plate 3 with grooves 4 on a lower plate 1 with ribs 2 and weld the grooves, as shown in Fig. 2. It is assembled by joining. [Problems to be Solved by the Invention] In the conventional welding assembly method for narrow gap members described above, the initial gap height H 0 before welding shown in FIG. 3A becomes as shown in FIG. 3B after welding. There is a problem that changes to H 1 . This is due to welding shrinkage when forming the welded portion 5. Moreover,
Since the magnitude of welding shrinkage varies due to slight variations in welding conditions, it has been extremely difficult to form a narrow gap with high precision. In order to avoid this problem, a method has been proposed in which a deformation preventing material 8 such as an iron piece or solid ceramic is inserted into the gap and welding is performed to prevent welding shrinkage, as shown in FIG. However, in this case, another problem occurred in that the deformation preventing material 8 was compressed by welding shrinkage, making it extremely difficult to remove it after assembly was completed. In view of the above circumstances, the technical object of the present invention is to perform welding assembly of narrow gap members while maintaining a narrow gap space with high precision. [Means for solving the problem] The method for welding and assembling narrow gap members according to the present invention includes:
A deformation prevention material made of a water-soluble material or a water-disintegrable material is filled in advance in the space that will become the void of the narrow gap member, and a through groove or a through hole is formed in a part of the deformation prevention material, and then assembled by welding. After this, the assembled structure is immersed in water to dissolve and remove the deformation preventing material. The deformation-preventing material used in the present invention is preferably one that can be filled into the voids in a fluid state, such as gypsum, and hardens by drying or by the action of an effect agent. Further, in the present invention, the reason why the deformation preventing material is formed with a through groove or a through hole is to facilitate the penetration of water when the deformation preventing material is removed by immersion in water after welding. Therefore, both ends of this through groove or through hole must be open. [Function] The function of the present invention will be explained as follows, together with one mode in which it is applied to the same narrow gap member assembly as in the case of FIGS. 2 to 4. As shown in FIG. 1A, first, a water-soluble deformation prevention material 6 is filled in the space partitioned by the ribs 2 of the lower plate 1, and furthermore, a through groove 7 is formed in the deformable member 6. When using gypsum for the deformation prevention material 6, it is also possible to form the through grooves 7 at the same time by a casting method in which fluidized gypsum is poured and hardened. In this state, as shown in FIG. 1B, the grooves of the upper plate 3 are welded and integrated by the welded portion 5 to assemble the narrow gap member. At this time, welding shrinkage in the height direction is completely prevented by the interposition of the deformation prevention material 6. Further, in this case, the through grooves 7 formed on both sides of the deformation prevention material act as spaces for forming the back waves. Next, when this welded and assembled narrow gap member is immersed in water, water penetrates into the deformation prevention material 6,
The deformation preventing material 6 is softened by dissolving or collapsing and can be easily removed. At that time, if there were no penetration grooves 7, it would take a long time for water to penetrate deep into the depth, but since there are grooves 7 penetrating in the depth direction, water can easily and quickly reach the depths of the deformation prevention material 6. It can be penetrated. Note that, instead of providing the through grooves 7 on the surface of the deformation preventing material 6 as shown in the drawings, the same effect can be obtained by providing a through hole in the center. [Example] Examples 1 and 2 Using the lower plate 1, rib 2 and upper plate 3 (rib thickness 5 mm, rib height 8 mm, rib pitch 50 mm) as shown in Fig. 1 A and B. , welded and assembled a narrow-gap member with 10 consecutive narrow gaps of 150 mm in depth. These materials are chromium/molybdenum steel, and TIG welding (residual heat 200°C) was used as the welding method. For the deformation prevention material 6, commercially available broken plaster mixed with 50% water or alumina powder mixed with 5% potassium carbonate was poured into the gap space, left to solidify for 2 hours, and then the top plate was removed. It was removed and a through groove 7 with a depth of 3 mm was formed. Comparative Example 1 A narrow gap member was welded and assembled in the same manner as in the example except that the deformation prevention material 6 was not used. Comparative Examples 2 and 4 Narrow gap members were welded and assembled in the same manner as in the example except that the through groove 7 was not formed on the surface of the deformation prevention material 6. The results of Examples 1 and 2 and Comparative Examples 1 to 3 are shown in Table 1 below.
以上詳述したように、本発明によれば狭間隙空
間を高精度に維持して効率良く狭間隙部材の溶接
組立てを行なうことができる等、顕著な効果が得
られるものである。
As detailed above, according to the present invention, remarkable effects such as being able to maintain a narrow gap space with high precision and efficiently perform welding and assembly of narrow gap members can be obtained.
第１図Ａ，Ｂは本発明による狭間隙部材の溶接
組立て方法の一態様を示す説明図、第２図は従来
行なわれている狭間隙部材の溶接組立て方法を説
明するための断面図であり、第３図Ａ，Ｂはその
問題点説明するための断面図、第４図は従来行な
われている狭間隙部材の溶接組立て方法の他の例
と、その問題点を示す断面図である。
１……下板、２……リブ、３……上板、４……
開先、５……溶接部、６……変形防止材、７，８
……貫通溝。
FIGS. 1A and 1B are explanatory views showing one embodiment of the welding assembly method for narrow gap members according to the present invention, and FIG. 2 is a sectional view for explaining a conventional welding and assembling method for narrow gap members. , FIGS. 3A and 3B are cross-sectional views for explaining the problems, and FIG. 4 is a cross-sectional view showing another example of a conventional welding assembly method for narrow gap members and its problems. 1...lower plate, 2...rib, 3...upper plate, 4...
Bevel, 5... Welded part, 6... Deformation prevention material, 7, 8
...through groove.
Claims (1)
料または水崩壊性材料からなる変形防止材を充填
すると共に、該変形防止材の一部に貫通溝または
貫通孔を形成した上で溶接による組立てを行なつ
た後、この組立てられた構造物を水中に浸漬する
ことにより前記変形防止材を溶解除去することを
特徴とする狭間隙部材の溶接組立て方法。1 Fill the space that will become the void of the narrow gap member in advance with a deformation prevention material made of a water-soluble material or a water-disintegrable material, and form a through groove or a through hole in a part of the deformation prevention material, and then assemble by welding. A method for welding and assembling narrow gap members, characterized in that after performing the above steps, the assembled structure is immersed in water to dissolve and remove the deformation prevention material.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10446585A JPS61262465A (en) | 1985-05-16 | 1985-05-16 | Method for welding and assembling narrow gap member |
| US06/831,589 US4754118A (en) | 1985-05-16 | 1986-02-21 | Method for fabricating a structural assembly having narrow gaps |
| IT47727/86A IT1190224B (en) | 1985-05-16 | 1986-03-06 | METHOD FOR BUILDING A STRUCTURAL COMPLEX HAVING CLOSE INTERSPACES |
| FR868603359A FR2581906B1 (en) | 1985-05-16 | 1986-03-10 | METHOD FOR MANUFACTURING A NARROW INTERVALS STRUCTURE ASSEMBLY |
| DE19863608449 DE3608449A1 (en) | 1985-05-16 | 1986-03-11 | METHOD FOR ASSEMBLING ELEMENTS |
| CN86101601.7A CN1006533B (en) | 1985-05-16 | 1986-03-12 | Method of manufacturing structural elements with narrow gaps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10446585A JPS61262465A (en) | 1985-05-16 | 1985-05-16 | Method for welding and assembling narrow gap member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61262465A JPS61262465A (en) | 1986-11-20 |
| JPH0366063B2 true JPH0366063B2 (en) | 1991-10-16 |
Family
ID=14381335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10446585A Granted JPS61262465A (en) | 1985-05-16 | 1985-05-16 | Method for welding and assembling narrow gap member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61262465A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5061836B2 (en) | 2007-10-10 | 2012-10-31 | 株式会社日立プラントテクノロジー | Impeller welding method and impeller |
| WO2017073500A1 (en) * | 2015-10-28 | 2017-05-04 | 株式会社荏原製作所 | Method of manufacturing impeller |
| JP6758144B2 (en) * | 2015-10-28 | 2020-09-23 | 株式会社荏原製作所 | How to manufacture an impeller |
-
1985
- 1985-05-16 JP JP10446585A patent/JPS61262465A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61262465A (en) | 1986-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |