| 摘要 |
PURPOSE:To economically produce a car body excellent in rustproof properties in a range over a long period by cutting, pressing and assembling a hot-rolled steel sheet and electrogalvanizing this structural parts body and thereafter assembling this body into a white body and performing the whole coating thereon. CONSTITUTION:A panel for constituting a car body is molded from a hot-rolled steel sheet being a common steel sheet by cutting and pressing it. Thereby the economical reutilization of cut scrape is made easy. Then the panel is assembled by performing spot weld and seam folding and a structural parts body is formed. Electrogalvanizing is performed in the stage of this structural parts body. Thereby electric charge is concentrated in the end parts of the cut faces of the panel and increment of wall thickness of plating is obtained and rustproof force is enhanced. Thereafter this plated structural parts body is assembled to form a white body and then the whole coating is performed to obtain the car body. |
