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    • 1. 发明公开
    • WELDING METHOD FOR T-JOINT
    • SCHWEISSVERFAHRENFÜRT-VERBINDUNG
    • EP2199003A4
    • 2017-02-15
    • EP08837732
    • 2008-09-26
    • HITACHI CONSTRUCTION MACH CO
    • NAKAJIMA TORUYAMAMOTO HIKARU
    • B23K9/02B23K9/095
    • B23K9/025
    • In a plate assembling step, a gap (5) is formed between a leading end portion (3A) of a groove (3) provided on an upright plate (2) and a lower plate (1). In this state, in a first welding step, an arc is generated from a welding wire (7) toward a back surface (3C) side of the groove (3) through the gap (5), to form a satisfactory penetration bead (8) on the back surface (3C) side of the groove (3). Next, in a second welding step, the welding wire (7), the lower plate (1), the groove (3) of the upright plate (2) and the penetration bead (8) are fused to form a first-layer welding bead (9), thereby firmly joining the lower plate (1) and the groove (3) of the upright plate (2). In this case, since the first welding step and the second welding step can be performed continuously after performing the plate assembling step, it is possible to enhance workability at the time of welding the lower plate (1) and the upright plate (2).
    • 在板组装工序中,在设置在立板(2)的槽(3)的前端部(3A)和下板(1)之间形成有间隙(5)。 在该状态下,在第一焊接工序中,通过间隙(5)从焊丝(7)向槽(3)的背面(3C)侧产生电弧,形成令人满意的焊道(8) )在槽(3)的背面(3C)侧。 接下来,在第二焊接工序中,将焊丝(7),下板(1),立板(2)的槽(3)和贯通珠(8)熔合,形成第一焊接 (9),从而牢固地连接下板(1)和直板(2)的槽(3)。 在这种情况下,由于可以在进行板组装工序之后连续进行第一焊接工序和第二焊接工序,所以能够提高焊接下板(1)和直板(2)时的加工性。