AUTOMATED TABLE APPARATUS FOR WELDING HEAVY STEEL CORNER OF SEALED WALL FOR LIQUEFIED NATURAL GAS TANK AND METHOD FOR MANUFACTURING HEAVY STEEL CORNER

摘要

PURPOSE: An automatic welding table apparatus of a heavy steel corner for a sealed wall of a liquefied natural gas storage tank and a method for manufacturing the heavy steel corner are provided to smoothly perform an automatic welding operation by rotating at various angles when a stiffener is fixed to a primary. CONSTITUTION: An automatic welding table apparatus of a heavy steel corner for a sealed wall of a liquefied natural gas storage tank includes a lower rotation table, an upper rotation table(20), a first stiffener fixing unit(30), and a second stiffener fixing unit(40). The lower rotation table is rotated by a lower table rotation driving unit(13). The upper rotation table is installed in a rotation module(22) in the center of the lower rotation table, and a straight bearing is installed on the top of the upper rotation table. The first stiffener fixing unit clamps a first stiffener(110) to one side of the primary on a first primary holding part(35) by the operation of a first hinge arm(31). The second stiffener fixing unit clamps a second stiffener(120) to the other side of the primary on a second primary holding part(45) by the operation of a second hinge arm(41). A locking unit(15) is installed on one side of the lower rotation table.