The invention provides an LNG ship liquid cargo tank low-position toggle plate welding anti-deformation method. The method comprises the following steps that firstly, an anti-deformation tool is manufactured, the anti-deformation tool comprises baffles and a bottom plate, the bottom plate is T-shaped, every two baffles as a group are welded to the bottom plate, the baffles are perpendicular to the bottom plate, and the number of groups of the baffles is three; secondly, low-position toggle plates are placed on a ship body, the anti-deformation tool is clamped to the positions of the low-position toggle plates, and the low-position toggle plates are located in gaps of the baffles respectively; thirdly, the low-position toggle plates and the ship body are welded, backing welding is conducted firstly, wrap angle welding is conducted firstly on the backing welding, then straight welding is conducted, and cosmetic welding is conducted firstly through straight welding and then through wrap angle welding; and fourthly, after the welding positions of the low-position toggle plates are cooled, the anti-deformation tool is taken down, and the next group of low-position toggle plates are welded. The free ends of the low-position toggle plates can be effectively fixed during welding, the welding deformation of the low-position toggle plates of a liquid cargo tank of an LNG ship is reduced, and the construction time is saved.

    本发明提供一种LNG船液货舱低位肘板焊接防变形方法,包括以下步骤:步骤一、制作防变形工装,所述防变形工装包括挡板及底板,所述底板为T字型,所述挡板两两为一组焊接于所述底板上,所述挡板与所述底板垂直,所述挡板设置为三组;步骤二、将低位肘板放置船体上,将所述防变形工装卡合于低位肘板的定位,低位肘板分别位于每组挡板的间隙内;步骤三、焊接低位肘板与船体,先打底焊,打底焊先进行包角焊再进行平直焊,盖面焊先进行平直焊再进行包角焊;步骤四、待低位肘板焊接位置冷却后,取下防变形工装,进行下一组低位肘板焊接。本发明能够在焊接时对低位肘板的自由端进行有效的固定,减少LNG船液货舱低位肘板的焊接变形量,节约了建造时间。


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    Titel :

    LNG ship liquid cargo tank low-position toggle plate welding anti-deformation method


    Weitere Titelangaben:

    一种LNG船液货舱低位肘板焊接防变形方法


    Beteiligte:
    GAO SI (Autor:in) / ZHU QIFENG (Autor:in) / ZHU WENXUE (Autor:in) / WANG HAO (Autor:in) / YANG RUIFENG (Autor:in) / WANG JIKUN (Autor:in)

    Erscheinungsdatum :

    2021-11-19


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B23K Löten , SOLDERING OR UNSOLDERING / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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