JPH0366064B2 - - Google Patents
Info
- Publication number
- JPH0366064B2 JPH0366064B2 JP16538185A JP16538185A JPH0366064B2 JP H0366064 B2 JPH0366064 B2 JP H0366064B2 JP 16538185 A JP16538185 A JP 16538185A JP 16538185 A JP16538185 A JP 16538185A JP H0366064 B2 JPH0366064 B2 JP H0366064B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- rib
- groove
- narrow gap
- 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
- 238000003466 welding Methods 0.000 claims description 25
- 239000011324 bead Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- 230000002265 prevention Effects 0.000 claims description 13
- 230000004907 flux Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000007547 defect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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、コンプレツサ・インペラ等の狭間隙
部材の溶接方法に関する。
〔従来技術〕
本出願人は、第３図に示すようにリブ付下板と
上板とからなる狭間隙部材の溶接方法を既に提案
した。即ち、この方法はリブ１を有する下板２上
に該リブ１上付近に開先を有する上板３を載せる
と共に、前記下板２、上板３の間隙に前記リブ１
の側面付近に溝４を有する例えば石膏等の水溶解
（水崩壊）性変形防止材５を設け、前記上板３の
開先とリブ１を溶接するものである、かかる方法
によれば、溶接変形を前記防止材５で防止して精
密な狭間隙部材を溶接、製作することが可能であ
る。
〔発明が解決しようとする問題点〕
しかしながら、第３図に示す溶接方法では変形
防止材５の溝４を溶接ビード６の裏波ビード６′
の脚長と同寸法とした場合、該裏波ビード６′が
変形防止材５に直接接触して変形防止材５の一部
が溶融したり、変形防止材５からガスが発生した
りすることにより裏波ビード６′に割れやブロー
ホール等の溶接欠陥が発生する恐れがある。
一方、変形防止材５の溝４の開口巾を裏波ビー
ド６′の脚長より十分に大きくした場合、裏波ビ
ード６′が変形防止材５に直接接触しないため、
上述した溶接欠陥は生じないが、溶接条件等の変
動により一定寸法の脚長をもつ裏波ビードを形成
することが困難となる。
本発明は、上記事情に鑑みなされたもので、溶
接欠陥がなく、一定寸法の脚長をもつ裏波ビード
を形成し得る狭間隙部材の溶接方法を提供しよう
とするものである。
〔問題点を解決するための手段〕
本発明は、リブ付板と板からなる狭間隙部材の
溶接において、狭間隙部に前記リブ付近に溝を有
する水溶性変形防止材を設けると共に、該溝を裏
波ビードの脚長より大きくし、かつ前記溝と前記
リブの間に耐熱性フラツクスを充填して溶接を行
なうことを特徴とするものである。
〔作用〕
本発明は変形防止材の溝を大きくすることによ
り、変形防止材に裏波ビードが直接接触するのを
回避できる。
また、溝とリブの間に充填するフラツクを耐熱
性の優れたものとすることによつて、裏波ビード
と接触してもほとんど溶融せず、裏波ビードに悪
影響を及ぼさない。
更に、耐熱性フラツクスの高さによつて、裏波
ビードが制御され、一定脚長となる。
〔発明の実施例〕
以下、本発明の実施例を第１図及び第２図を参
照して説明する。
まず、リブ１を有するCr−Mo鋼からなる下板
２の凹部（狭間隙部に相当）に、該リブ１付近に
溝４を有する崩解石膏からなる変形防止材５を設
ける。なお、溝４は溶接時の裏波ビードの脚長よ
り十分に大きくする。つづいて、前記溝４とリブ
１の間に耐熱性フラツクス７をリブ１上面より２
mm低くなるように充填した。このフラツクス７は
融点が1500℃で、MgO50％、CaF215％、
Al2O310％、CaO20％及びSiO25％の組成からな
る。次いで、前記下板２のリブ１上に該リブ１付
近に開先８を有するCr−Mo鋼からなる上板３を
載置した後TIG溶接を行なつて溶接ビード６を形
成した。なお、溶接後に狭間隙部に水を吹き付け
ることにより、変形防止材５と共にフラツクス７
も除去された。
しかして、溶接後の裏波ビード６′の脚長を検
査したところ、下記表に示す結果を得た。なお、
表中には融点1050℃の通常の溶接フラツクスを用
いた場合、及びフラツクスを用いない場合の裏波
ビードの脚長を夫々比較例１、２として併記し
た。
[Industrial Field of Application] The present invention relates to a method of welding narrow gap members such as compressors and impellers. [Prior Art] The present applicant has already proposed a method for welding a narrow gap member consisting of a ribbed lower plate and an upper plate as shown in FIG. That is, in this method, an upper plate 3 having a groove near the top of the rib 1 is placed on a lower plate 2 having ribs 1, and the rib 1 is placed in the gap between the lower plate 2 and the upper plate 3.
According to this method, a water-soluble (water-disintegrating) deformation preventing material 5 such as gypsum is provided with a groove 4 near the side surface of the upper plate 3, and the groove of the upper plate 3 and the rib 1 are welded. It is possible to weld and manufacture a precise narrow gap member by preventing deformation using the preventive material 5. [Problems to be Solved by the Invention] However, in the welding method shown in FIG.
If the dimension is the same as the leg length of the deformation prevention material 5, the Uranami bead 6' will directly contact the deformation prevention material 5 and a part of the deformation prevention material 5 will melt, or gas will be generated from the deformation prevention material 5. There is a possibility that welding defects such as cracks and blowholes may occur in the Uranami bead 6'. On the other hand, if the opening width of the groove 4 of the deformation prevention material 5 is made sufficiently larger than the leg length of the uranami bead 6', the uranami bead 6' will not come into direct contact with the deformation prevention material 5.
Although the above-mentioned welding defects do not occur, it becomes difficult to form a uranami bead with a constant leg length due to variations in welding conditions. The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a method for welding narrow-gap members that is free from welding defects and can form an uranami bead with a constant leg length. [Means for Solving the Problems] The present invention provides a water-soluble deformation prevention material having a groove near the rib in the narrow gap part in welding a narrow gap member made of ribbed plates and plates, and also provides a water-soluble deformation prevention material having a groove near the rib. is larger than the leg length of the uranami bead, and a heat-resistant flux is filled between the groove and the rib to perform welding. [Function] By enlarging the grooves of the deformation prevention material, the present invention can avoid direct contact of the Uranami bead with the deformation prevention material. Furthermore, by making the flak filled between the groove and the ribs excellent in heat resistance, it hardly melts even when it comes into contact with the Uranami bead, and has no adverse effect on the Uranami bead. Furthermore, the height of the heat-resistant flux controls the Uranami bead, resulting in a constant leg length. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. First, a deformation preventing material 5 made of disintegrated gypsum and having grooves 4 near the ribs 1 is provided in a recessed portion (corresponding to the narrow gap) of a lower plate 2 made of Cr-Mo steel having ribs 1. Note that the groove 4 is made sufficiently larger than the leg length of the uranami bead during welding. Next, a heat-resistant flux 7 is applied between the groove 4 and the rib 1 from the upper surface of the rib 1.
It was filled so that it was lower by mm. This flux 7 has a melting point of 1500℃, 50% MgO, 15% CaF2 ,
Consisting of 10% Al 2 O 3 , 20% CaO and 5% SiO 2 . Next, an upper plate 3 made of Cr-Mo steel having a groove 8 near the rib 1 was placed on the rib 1 of the lower plate 2, and then TIG welding was performed to form a weld bead 6. Note that by spraying water into the narrow gap after welding, the flux 7 is removed together with the deformation prevention material 5.
was also removed. When the leg length of the uranami bead 6' after welding was examined, the results shown in the table below were obtained. In addition,
In the table, the leg lengths of the uranami bead when a normal welding flux with a melting point of 1050° C. was used and when no flux was used are also shown as Comparative Examples 1 and 2, respectively.
以上詳述した如く、本発明の溶接方法によれば
狭間隙部に水溶解性変形防止材を設けることによ
り溶接変形が防止され、高精度の狭間隙部材を製
作でき、更に該防止材の溝とリブの間に耐熱性フ
ラツクスを充填することにより溶接に悪影響を及
さず、溶接欠陥がなく一定寸法の平滑な裏波ビー
ドを形成できる等髄著な効果を有する。
As described in detail above, according to the welding method of the present invention, welding deformation is prevented by providing a water-soluble deformation preventing material in the narrow gap part, a highly accurate narrow gap member can be manufactured, and the groove of the preventing material is By filling the heat-resistant flux between the weld and the rib, it has the most significant effect of not adversely affecting the welding, and making it possible to form a smooth Uranami bead of a constant size without welding defects.
第１図は本発明の実施例における溶接過程を示
す部分切欠斜視図、第２図は第１図の要部断面
図、第３図は本出願人が既に提案した溶接方法を
示す断面図である。
１……リブ、２……下板、３……上板、４……
溝、５……変形防止材、６……溶接ビード、６′
……裏波ビード、７……耐熱性フラツクス、８…
…開先。
Fig. 1 is a partially cutaway perspective view showing the welding process in an embodiment of the present invention, Fig. 2 is a sectional view of the main part of Fig. 1, and Fig. 3 is a sectional view showing a welding method already proposed by the applicant. be. 1...Rib, 2...Lower plate, 3...Upper plate, 4...
Groove, 5... Deformation prevention material, 6... Welding bead, 6'
...Uranami bead, 7...Heat-resistant flux, 8...
...bevel.
Claims (1)
いて、狭間隙部に前記リブ付近に溝を有する水溶
性変形防止材を設けると共に、該溝を裏波ビード
の脚長より大きくし、かつ前記溝と前記リブの間
に耐熱性フラツクスを充填して溶接を行なうこと
を特徴とする狭間隙部材の溶接方法。1. In welding a narrow gap member consisting of a ribbed plate and a plate, a water-soluble deformation prevention material having a groove near the rib is provided in the narrow gap, and the groove is made larger than the leg length of the uranami bead, and the groove is A method for welding a narrow gap member, characterized in that welding is performed by filling a heat-resistant flux between the rib and the rib.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16538185A JPS6228071A (en) | 1985-07-26 | 1985-07-26 | Welding method for 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 |
|---|---|---|---|
| JP16538185A JPS6228071A (en) | 1985-07-26 | 1985-07-26 | Welding method for narrow gap member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6228071A JPS6228071A (en) | 1987-02-06 |
| JPH0366064B2 true JPH0366064B2 (en) | 1991-10-16 |
Family
ID=15811298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16538185A Granted JPS6228071A (en) | 1985-05-16 | 1985-07-26 | Welding method for narrow gap member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6228071A (en) |
Families Citing this family (1)
| 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 |
-
1985
- 1985-07-26 JP JP16538185A patent/JPS6228071A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6228071A (en) | 1987-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3511960A (en) | Electric arc welding | |
| JPH0366064B2 (en) | ||
| US4754118A (en) | Method for fabricating a structural assembly having narrow gaps | |
| JPS61119398A (en) | Welding end tab | |
| JPH0719676Y2 (en) | Welding end tab | |
| JPH09271992A (en) | Backing material for t-joint | |
| JPH0216874Y2 (en) | ||
| JPS6325036Y2 (en) | ||
| JPS6229199Y2 (en) | ||
| JPH03118978A (en) | Root submerged arc welding method for extra-thick plate multilayer welding | |
| JP3706892B2 (en) | 4-electrode single-sided submerged arc welding method | |
| JPH049636B2 (en) | ||
| JP2564570Y2 (en) | End tab for welding | |
| JPH01241380A (en) | Submerged arc welding method for square joint part | |
| JPS5914055Y2 (en) | Copper water cooling tab material for electroslag welding | |
| JPS60152367A (en) | Web material for fillet welding | |
| JPS5868481A (en) | Narrow groove welding method for high carbon steel material | |
| JPH01205892A (en) | Method for welding high carbon steel | |
| JP4102589B2 (en) | Ceramic end tabs for welding | |
| JPS6116229B2 (en) | ||
| JPS5823833B2 (en) | Butt welding method for fixed pipes | |
| JPH05192795A (en) | End tab for welding | |
| JPH05318186A (en) | End tab for welding with robot | |
| JPS58218381A (en) | Narrow groove gas shield arc welding of extra thick steel | |
| JPH04200871A (en) | Composite tab material used for high heat input submerged arc welding of thick steel plate |