TUBULAR BACK BEAM FOR VEHICLE AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a tubular back beam for a vehicle and a manufacturing method thereof, wherein a plurality of main members (11) processed in a hot stamping construction method after a cold rolling processing comes into contact with each other and is combined by being vertically piled, or a main back beam (11) and a support member (14) may be directly connected by being vertically piled.