| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved method for manufacturing a tube and an outlined object having enhanced productivity. SOLUTION: The method for manufacturing the tube and outlined object having variable wall thicknesses to their lengths comprises a step of flexibly rolling a continuous material strip having a variable thickness in the longitudinal direction of the material strip to the final wall thickness as a result of continuous reduction with regard to the initial wall thickness, a step of reshaping the material strip for forming a continuous tube and outlined object, and a step of cutting the continuous tube and outlined object to the tubes and outlined objects having individual lengths. COPYRIGHT: (C)2005,JPO&NCIPI |
