METHOD FOR MANUFACTURING SPIRAL ROD

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing at low costs a spiral rod whose accuracy of shape of a spirally projected bar is within the permissible range. SOLUTION: The method for manufacturing the spiral rod is characterized in that on the surface of a rod-like or a tubular metal material 2, the same or a different metal material 2 as the metal material is padded by welding to form a spiral projected bar 4.