Method and apparatus for hydroforming and hydroshearing

摘要

A tubular member (12) is manufactured in a hydroforming and hydroshearing apparatus (10). A substantially right circular cylindrical workpiece (18) is placed in a die (14,16) and pressurized to hydroform a substantially rectangular tubular product. The workpiece is presheared during the pressurization period and is fully sheared during the withdrawal of a plurality of plunger members (38) while the internal pressure is maintained. The plunger members are positioned in the die by respective power cylinders (42) which control the withdrawal thereof.