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Hydroforming Tools

  2010年03月08日

1. Features of hydroforming tools

In volume production environment, dynamic sealing of high pressure water medium needs to be ensured.
Synchronous hydraulic punching of more than ten holes is required. The tools have complicated structure
with motion device, similar to a machine.
Tools design is difficult, because the tools are characterized with high pressure and large clamping force,
complicated stress state and deformation.

2. Key technologies of hydroforming tools

In mass production environment, dynamic sealing of tube end is successfully realized under the condition of
400 MPa ultra-high pressure, which makes it possible for high-rate production.
Seal-stem for tube ends with irregular cross-section has been proposed. Transition segment from round to
irregular cross-section can be avoided, and material utilization ratio increases to 90%.
With the break through in synchronous hydraulic punching, the punching of more than sixteen holes from the
spatial four directions has been realized.
Through the controlling strategy of variable clamping force, the tools load is kept at a low level. The size of
tool is decreased and much lower cost is needed.
 

3. Main achievements

Many molds for mass production have been developed for Chinese national independent brand cars and
international famous brand cars, including Besturn B50/B70 of FAW, Mazda 6, Haval H6 of Great Wall, B40
of BAW, Chrysler 300C and Audi A6L. Automotive components, such as engine cradle, control arm, front beam support, instrument panel support, front chassis beam, exhaust pipe, have been assembled for over one million of cars.


4. Typical parts by hydroforming

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