公开(公告)号：EP4257278A1

公开(公告)日：2023-10-11

申请号：EP22819055.9

申请日：2022-01-05

申请人： CRRC Qingdao Sifang Co., Ltd.

发明人： HAN, Xiaohui ,  LI, Shuaizhen ,  ZHANG, Zhiyi ,  WANG, Peng ,  MAO, Zhendong ,  MA, Guolong

IPC分类号： B23K9/28 ,  B23K9/32

摘要： A welding apparatus for suppressing welding thermal cracks, comprising a first fixing plate (10) and a second fixing plate (20) arranged at an interval; a gas-electric slip ring is connected to the side of the first fixing plate facing the second fixing plate; a hollow shaft drive unit (30) is connected to the side of the second fixing plate facing the first fixing plate; a conductive link (40) is connected to the hollow shaft drive unit and passes through the second fixing plate; a curved conductive nozzle (50) is connected to the conductive link on the outer side of the second fixing plate; and a plurality of support rods (60) are uniformly distributed around the rotational axial direction of the hollow shaft drive unit, and are respectively connected to the first fixing plate and the second fixing plate; the hollow shaft drive unit drives the conductive link to rotate, and the conductive link drives the curved conductive nozzle to oscillate. Also relating to a welding system provided with said welding apparatus. The present welding apparatus and welding system, by means of arc oscillation, promote the flow of liquid metal, refine the weld grain structure, reduce the segregation of impurity elements, and make liquid metal from a molten pool area flow back to a grain boundary liquefaction area of a heat affected zone, reducing the production of cracks and increasing the crack propagation resistance.