Abstract
This paper was reported relationship between deformation of press forming die with cartridge rib and formability. At the press forming, die and mould are deformed by forming load. This elastic deformation makes forming defects. It may be effective to increase ribs on a die and mould, although those thickness and layout are restricted by temperature stress at casting. To research the effect of asymmetric rib, a structural analyses and using the small press model for forming experiment were simulated. As the result, deformation of design surface was very small, and same trend were exited at analyses and forming experiment.
