| 摘要 |
A hydroforming machine characterized by a die 2 having an opening on the upper surface and a fluid tank 2 a filled with fluid, a holder 3 being able to hold a periphery part between the die 2 and itself, a punch 4 being movable in a direction into or out for the fluid tank 2 a, and a pressure controller 5 controlling the fluid pressure in the fluid tank 2 a according to the position of the punch 4.
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