JPS58221692A - Correction method of welding strain - Google Patents
Correction method of welding strainInfo
- Publication number
- JPS58221692A JPS58221692A JP10296382A JP10296382A JPS58221692A JP S58221692 A JPS58221692 A JP S58221692A JP 10296382 A JP10296382 A JP 10296382A JP 10296382 A JP10296382 A JP 10296382A JP S58221692 A JPS58221692 A JP S58221692A
- Authority
- JP
- Japan
- Prior art keywords
- strain
- coil
- cooling
- heating
- welding
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は隅肉溶接により発生した溶接歪（例えば、船体
のやせ馬等）を修正する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for correcting weld distortion caused by fillet welding (eg, languor of a ship's hull, etc.).
一般に、船体等に隅肉溶接を施こした場合、第１図に示
すように、やせ馬歪が発生する。Generally, when fillet welding is performed on a ship's hull or the like, lanky distortion occurs as shown in FIG.
第１図中、点線１′で示す状態のものが、溶接２により
実線１で示すように歪む。In FIG. 1, the state shown by dotted line 1' is distorted by welding 2 as shown by solid line 1.
この歪は、従来、ガス火焔による加熱（線状加熱〕によ
り修正していたが、ガス火焔では火焔温度が低い上に、
火焔の集中度が悪く、効果的な歪修正ができないばかり
でなく、火焔調整や温度管理を経験者の勘に頼るため、
自動化や無人化は困離であり、施工に高技能者による多
大の労力を費やしていた。Conventionally, this distortion has been corrected by heating with a gas flame (linear heating), but in addition to the low flame temperature with a gas flame,
Not only is the flame concentration poor, making it impossible to effectively correct distortion, but flame adjustment and temperature control rely on the intuition of experienced people.
Automation or unmanned construction is difficult, and construction requires a great deal of labor by highly skilled workers.
本発明者らは、高技能者の減少あるいけ工数低減のニー
ズに対応して、この歪修正作業を自動化、無人化するた
め、効果的でかつ条件管理の容易な歪修正方法を提供す
べく研究を重ねたところ、各種金属の熱特性調査やパイ
プの曲げ加工等に使用されている円形高周波コイルを直
線に伸ばした棒状電極を用いて高周波加熱を行うことが
合目的であるという知見を得て、本発明方法に到達した
。The inventors of the present invention aimed to provide a distortion correction method that is effective and easy to manage conditions in order to automate and unattend this distortion correction work in response to the need to reduce the number of highly skilled workers and man-hours. After repeated research, we found that it is appropriate to perform high-frequency heating using a rod-shaped electrode made by straightening a circular high-frequency coil, which is used for investigating the thermal properties of various metals and bending pipes. As a result, we have arrived at the method of the present invention.
すなわち本発明は、隅肉溶接により発生した溶接歪を修
正する方法において、前記溶接歪発生部所に中空でかつ
水噴出口を有する棒状電極を近置させ、該電極に高周波
電流を流して前記溶接歪発生部所を高周波加熱すると共
に、該電極内に冷却水を通し水噴出口から該冷却水を該
加熱部周辺に噴出させて該周辺を冷却す−ることを特徴
とする溶接歪の修正方法に関するものである。That is, the present invention provides a method for correcting welding distortion caused by fillet welding, in which a hollow rod-shaped electrode having a water spout is placed close to the welding distortion generating area, and a high-frequency current is passed through the electrode to correct the welding distortion. A method for reducing welding distortion characterized by heating the welding distortion generation area with high frequency, and cooling the area by passing cooling water through the electrode and spouting the cooling water from a water spout around the heated area. This is related to the correction method.
第２図（Ａ） 、 （Ｂ）は本発明方法の一実施態様例
を示す図で、第２図（Ａ）は正面図、第２図（Ｂ）は側
面図である。FIGS. 2(A) and 2(B) are diagrams showing an embodiment of the method of the present invention, with FIG. 2(A) being a front view and FIG. 2(B) being a side view.
第２図（Ａ） 、 （１３）において、１は抜材（造船
では皮材という〕、２はスラブ板（造船では骨材という
〕、３は皮材１と骨材２との隅肉溶接金属、４け隅肉溶
接後歪んだ皮材１の形状、である。In Figures 2 (A) and (13), 1 is a punched material (referred to as skin material in shipbuilding), 2 is a slab plate (referred to as aggregate in shipbuilding), and 3 is fillet welding of skin material 1 and aggregate 2. The shape of the skin material 1 is distorted after four fillet welding of metal.
棒状電極（以下、棒状コイルと称す）６には電気端子７
を介して高周波電源８から高周波電流が供給される。The rod-shaped electrode (hereinafter referred to as a rod-shaped coil) 6 has an electric terminal 7.
A high frequency current is supplied from a high frequency power supply 8 via.
冷却水９は冷却水供給口１１がら棒状コイル６内に供給
され、冷却水噴出口１ｏがら噴き出す。
□゛・
皮材１に骨材２を隅肉溶接すると、溶接金属３の収縮に
より皮材１は４に示すように歪む。Cooling water 9 is supplied into the rod-shaped coil 6 through a cooling water supply port 11, and is spouted out through a cooling water spout 1o.
□゛・ When aggregate 2 is fillet welded to skin material 1, skin material 1 is distorted as shown in 4 due to contraction of weld metal 3.
この歪みを修正するには、骨材の背の部分５を加熱後収
縮させる必要がある。To correct this distortion, it is necessary to shrink the back portion 5 of the aggregate after heating.
そこで本発明方法では、棒状コイル（例えば、銅製）に
電気端子７を介して高周波電源８から高周波電流（板厚
によって異なるが、通常は１〜５ ｋＨｚ ）を流すと
、電磁誘導現象によって皮材１の表層部すなわち骨材の
背の部分５に渦電流が流れ、この抵抗発熱によって加熱
される。Therefore, in the method of the present invention, when a high-frequency current (usually 1 to 5 kHz, depending on the plate thickness) is passed from a high-frequency power source 8 through an electric terminal 7 to a rod-shaped coil (for example, made of copper), the skin material is heated by an electromagnetic induction phenomenon. An eddy current flows through the surface layer 5 of the aggregate, that is, the back portion 5 of the aggregate, and it is heated by this resistance heat generation.
この加熱部は、冷却時、収縮して反対方向に歪み、もと
の歪を修正するのである。When this heated part cools, it contracts and distorts in the opposite direction, correcting the original distortion.
この加熱部の範囲をできるだけ狭く、すなわち細くする
と、更に効果が上るので、加熱部周辺を水冷することが
望ましい。If the area of this heating part is made as narrow as possible, that is, made thinner, the effect will be further improved, so it is desirable to water-cool the area around the heating part.
そこで本発明方法では、上記の加熱中に、冷却水９を供
給口１１から棒状コイル６内に通水し、噴出口１０から
噴き出させるのである。Therefore, in the method of the present invention, during the heating described above, the cooling water 9 is passed through the rod-shaped coil 6 through the supply port 11 and is jetted out from the jet port 10.
このような状態で、棒状コイル６を例えば走行台車に乗
せるなどして矢印１２の方向に移動させれば、長尺の歪
も容易に修正することができる。In this state, if the rod-shaped coil 6 is placed on a traveling trolley and moved in the direction of the arrow 12, the long distortion can be easily corrected.
なお、歪修正量の調整は、周波数電流や棒状コイル６の
移動速度を変えるなどして加熱温度や加熱範囲を変える
ことによって行うことができる。Note that the amount of distortion correction can be adjusted by changing the heating temperature and heating range by changing the frequency current and the moving speed of the rod-shaped coil 6, for example.
以上説明したように、本発明方法によれば、溶接による
やせ馬歪を短時間で均一に修正でき、能率向上、省人化
を図ることができる。As explained above, according to the method of the present invention, it is possible to uniformly correct the thin horse distortion caused by welding in a short time, and it is possible to improve efficiency and save labor.
第１図は溶接によるやせ馬歪を説明するだめの図、第２
図（Ａ） 、 （Ｂ）は本発明方法の一実施態様例を示
す図である。
復代理人 内 １） 明
復代理人 萩 原 亮 −
２Figure 1 is a diagram to explain the thin horse distortion caused by welding, Figure 2
Figures (A) and (B) are diagrams showing one embodiment of the method of the present invention. Sub-agents 1) Meifuku agent Ryo Hagiwara - 2
Claims (1)
、前記溶接歪発生部所に中空でかつ水噴出口を有する棒
状電極を近置させ、該電極に高周波電流を流して前記溶
接歪発生部所を高周波加熱すると共に、該電極内に冷却
水を通し水噴出口から該冷却水を該加熱部周辺に噴出さ
せて該周辺を冷却することを特徴とする溶接歪の修正方
法。In a method for correcting welding distortion caused by fillet welding, a hollow rod-shaped electrode having a water spout is placed close to the welding distortion generating area, and a high frequency current is passed through the electrode to cause the welding distortion to occur. A method for correcting welding distortion, which comprises heating a part with high frequency, and cooling the area by passing cooling water through the electrode and jetting the cooling water from a water spout around the heated part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296382A JPS58221692A (en) | 1982-06-17 | 1982-06-17 | Correction method of welding strain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296382A JPS58221692A (en) | 1982-06-17 | 1982-06-17 | Correction method of welding strain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58221692A true JPS58221692A (en) | 1983-12-23 |
Family
ID=14341433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10296382A Pending JPS58221692A (en) | 1982-06-17 | 1982-06-17 | Correction method of welding strain |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58221692A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100677465B1 (en) * | 2005-08-10 | 2007-02-07 | 이영화 | Linear Induction Heating Coil Tool for Plate Bending |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56130432A (en) * | 1980-03-14 | 1981-10-13 | Hitachi Ltd | Improvement for residual stress of pipe |
-
1982
- 1982-06-17 JP JP10296382A patent/JPS58221692A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56130432A (en) * | 1980-03-14 | 1981-10-13 | Hitachi Ltd | Improvement for residual stress of pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100677465B1 (en) * | 2005-08-10 | 2007-02-07 | 이영화 | Linear Induction Heating Coil Tool for Plate Bending |
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