| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety countermeasure for operators in liquid pressure forming for a working material, and avoid the occurrence of the trouble of the peripheral facilities. SOLUTION: In the liquid pressure forming device 1, wherein a pipe material 7 in a state of being housed inside a predetermined shaped die comprising a cope 2 and a drag 3 is subjected to liquid pressure forming by feeding by pressure a pressurized liquid inside the pipe material, the cross-sectional shape of the cope 2 and the drag 3 in the vicinity of the die outside opposing to each other interposing the dividing face of the cope and the drag has a recess and projection relationship, a recess 2A is formed on the cope 2, and a projection 3A, whose upper face position becomes higher than the dividing face of the cope and drag, is formed on the drag 3.
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