Abstract
This study is to investigate the effects of the process parameters on the heading load and metal flow pattern during heading processes of titanium alloy dental screws. The flow stresses of titanium alloy Ti-6Al-4V at different forming temperatures and strain rates are obtained by compression tests. A heading process composed of two stages of shaft extrusion and head forging is proposed. The material flow pattern of the billet inside the die is analyzed using the finite element analyses. The effects of the upper die stroke and forming speed on the heading loads and product shapes are discussed. On the other hand, die stress analysis inside the punch and lower die are also investigated.
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