The invention discloses a regeneration
repair method for tubular parts of a die-
casting machine. The regeneration
repair method comprises the steps that bearizing is conducted, i.e., wear portions of the old tubular parts are eliminated through a turning lathe or a
grinding tool;
welding is conducted, i.e., the portions eliminated after the tubular parts are abraded are repaired with a bead
welding method by adoption of an inner
diameter automatic
welding device;
machining is conducted, i.e., the turning lathe and a grinder are reused for deep
machining, so that the tubular parts are restored to be in an original size or a size required according to an original drawing; and surface treatment is conducted, i.e.,
nitrogen treatment is conducted on the surfaces of the tubular parts after regeneration repair, and the whole repair process is completed. According to the regeneration
repair method for the tubular parts of the die-
casting machine, by means of the independently developed special inner
diameter welding technology, the bead weld regeneration repair becomes possible, the bead welding method is used for welding repair, and the tubular parts can be restored to be in the original size. The tube regeneration cost is 60-80% that of new products, regeneration can be conducted for three to five times, the cost can be effectively reduced, the repaired tubular parts are same as or longer than the new products in service life, and the regeneration repair is economical and protects the environment.