HYDROFORMING METHOD FOR PREVENTING EXPROSION DEFECT OF TUBE

摘要

One method of hydroforming work, for preventing the explosion defect an of pipe, generation explosion defect or crack are provided to due to the increase of coefficient of friction according to anxious expand of pipe, are being formed by during accurately controlling the gap between a pipe and an outer surface of a mold surface. In the method for producing a tube type hydroforming product, one method of hydroforming work, for preventing the explosion defect an of pipe, includes the following steps:: being a reinforcement (103) recording from a synthetic resin or urethane formation on the bending part in a tube workpiece (102) with tape; The pipe of insertion recording enters a hydroforming mould (101) to execute a hydroforming process, and wherein reinforcement tape recording step includes adjusting a gap between the pipe and a surface of the reinforcement recording of mould to from 0.4 millimeters to 0.6 millimeters of a range.