APPARATUS FOR FORMING THERMAL-SPRAYED COATING AND METHOD FOR FORMING THERMAL-SPRAYED COATING

摘要

PROBLEM TO BE SOLVED: To keep the ignitability of a wire excellent without removing a round tip of the wire even when the tip of the wire has become round.;SOLUTION: A thermal spraying gun 7 forms a thermal-sprayed coating on an inner surface 3a of a cylinder bore by generating an arc between an electrode of a tip side of a thermal spraying nozzle portion 9 and a tip 11a of the wire 11 to melt the tip 11a, and jets the molten metal ahead of the gun. A wire rolling mill 15 which rolls a wire 11 and reduces the cross section of the wire 11 is installed on the upper end of the thermal spraying gun 7. The wire rolling mill 15 comprises: a rolling roller 27 which sends the wire 11 forward while pressurizing and smashing the wire 11 into a flat shape; and a tension roller 29 which generates tension force in the wire 11 by setting a rotation speed higher than that of the rolling roller 27 so as to inhibit the spread of the width of the wire 11 which has been smashed by the rolling roller 27.;COPYRIGHT: (C)2009,JPO&INPIT