METHOD FOR MANUFACTURING COMPOSITE CROSS-SECTIONAL MEMBER AND MANUFACTURING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a composite cross-sectional member that is light-weight and is locally highly strengthened.SOLUTION: A method for manufacturing a composite cross-sectional member 1 includes: feeding a continuous steel sheet 2 into a manufacturing device 10 for bending; roll forming the steel sheet into a predetermined cross-sectional shape; locally inserting a non-continuous aluminum core material 3 in an optional step of roll forming; and bending so as to integrate the core material 3 and the steel sheet 2 together to obtain a composite cross-sectional member.SELECTED DRAWING: Figure 1