Electric arc additive forming method for aluminum alloy structural member

The invention discloses an electric arc additive forming method for an aluminum alloy structural member. By welding a plurality of layers of aluminum alloy materials onto an aluminum alloy forming part, the method includes the following steps that (1) predetermined values of the working current, wire feeding speed, welded joint width and welding wire diameter are set; (2) the (n+1)th layer of welding is executed on the forming part, (n+1) layers of welding include r weld beads, and the directions of welding paths of the adjacent weld beads are opposite; (3) the (n+2)th layer of welding is completed, (n+2) layers of welding include r weld beads, and the welding path of the second layer of welding is opposite to that of the first layer of welding; and (4) the second step and the third step are executed repeatedly, (n+m) layers of welding are competed ultimately, and the aluminum alloy structural member is formed at last; wherein n is equal to 1,2,3,...,; and m is equal to 4,5,6, ... 本发明公开了种铝合金结构件电弧增材成型方法，该方法通过在