Robust optimization of consistency in filling of rib-grooves for titanium alloy multi-rib eigenstructure

Isothermal forging is an effective method for forming and manufacturing large-scale titanium alloy components with multi-rib. However, successive filling of the rib-grooves reverse flow material are prone to occur during process, which makes those difficult be filled then resulting in disturbed excessive die loading. The variability billet sizes fluctuation uncertain parameters process have great impacts on results stability. To this end, eigenstructure multi-rib from large rib-web was extracted, combined finite element simulation physical experiment used based isothermal technique. Firstly, model under established, behavior rib-groove cavity analyzed. Secondly, variation pattern range investigated by considering deterministic factors sizes, as well uncertainties draft angle, temperature, speed, deviation, friction factor. Subsequently, significant uncertainty screened out, correlation between mean value variance consistency rib grooves factors, i.e., established dual response surface method. Then, a robust optimization constructed solved. Finally, reliability solution compared verified obtain ideal stable fully adjusting regulating weaken interference achieve simultaneous grooves.