METHOD AND DEVICE FOR EXPANDING TUBULAR MEMBER

摘要

PROBLEM TO BE SOLVED: To easily expand an opening end of a work formed of a metal tube in an inclined manner to the axis of the work. SOLUTION: A punch is arranged on the side of an opening end of a work of a metal tube, and the punch is inserted from the opening end of the work to expand an end part of the work. A punch 18 is inserted from the opening end of the work with a specified angle with respect to the axis A of the work 6. When the punch 18 is inserted, the punch 18 and/or the work 6 is moved in the nearly orthogonal direction Y1-Y2 to the advancing/retracting direction Z1-Z2 of the punch 18 to implement the expansion.