公开(公告)号：EP3527316A1

公开(公告)日：2019-08-21

申请号：EP17860382.5

申请日：2017-10-10

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： FUJIWARA Junji ,  FURUYAMA Yuya

IPC分类号： B23K9/073 ,  B23K9/12

摘要： An arc welding method alternately generates a short-circuit state and an arc state. In the method, short circuits are generated also in the arc period. This more than doubles the total number of short circuits, which is the sum of the short circuits generated in the short circuit period and those generated in the arc period. This enables a thin plate to be arc welded at a higher speed, while reducing its burn-through.

公开(公告)号：EP3437777A1

公开(公告)日：2019-02-06

申请号：EP17774440.6

申请日：2017-03-17

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： FURUYAMA Yuya ,  KAWAMOTO Atsuhiro ,  FUJIWARA Junji ,  KOWA Masaru ,  MATSUI Kaito

IPC分类号： B23K9/073 ,  B23K9/12

摘要： In thin sheet welding, when a heat input amount relative to a sheet thickness is too large, a welding defect such as a deviation from aim due to occurrence of a strain or burn through may easily occur. When a welding current is decreased to reduce the heat input amount, there is an issue in which an arc tends to become unstable. In arc welding in which short-circuit and arcing are repeated, first heat input period (Th) and second heat input period (Tc) having a heat input amount less than that of first heat input period (Th) are periodically repeated and a welding current during an arc period in second heat input period (Tc) is decreased to extinguish the arc. This reduces the heat input amount into a welding object and suppresses burn through or a strain upon welding, while making the arc stable.