| 摘要 |
PURPOSE:To manufacture a shape excellent in the surface skin by making into a bending formed shape and cold rolling it after grinding the surface of one side of an intermediate shape of which the cross section is flatter than the final section. CONSTITUTION:A billet is hot rolled and the intermediate shape 1 which is flatter than the final cross section with one intermediate side part 2 and the other side part 3 is formed. The surface of improved skin is made by grinding the surface of one side of the intermediate shape 1 with a surface treating member and, subsequently, a formed shape is made by bending one intermediate side part 2 and the other intermediate side part 3 into a near shape to the final cross section and the surface of improved skin is cold rolled. In this way, the surface roughness of the surface of improved skin is made smaller and the rolled shape excellent in the surface skin can be manufactured. |
