To provide a hydroforming capable of consistently ensuring the seal performance between a hydroforming mechanical seal and a stock tube.
The hydroforming device comprises a fluid pressure feed unit to feed the fluid pressure into a stock tube 6, a shaft-pressing unit to press an end face of the stock tube 6 in its axial direction, a forming die to regulate the outline of the stock tube 6 and form it into an arbitrary shape, and a mechanical seal 20 fitted in an end opening of the stock tube 6 and having a fluid inlet 40. The mechanical seal 20 has an introduction part 22 having the outline dimension smaller than the inner dimension of the end opening of the stock tube 6 from the tip end side fitted in the stock tube 6, a tapered part 24 which is continuously connected to the introduction part 22 with the outline dimension being gradually increased, a seal part 26 which is continuously connected to the tapered part 24 and having the outline dimension larger than the inner dimension of the end opening of the stock tube 6, and a base part 28.
JP2003164924A | 2003-06-10 | |||
JPS4948827B1 | 1974-12-24 | |||
JP2004202571A | 2004-07-22 | |||
JPS6015027A | 1985-01-25 |
Jun Ishida