Factors influencing the spinforming of large鄄diameter and thin鄄walled TC4 alloy tube were analysized.
Formation mechanism of spinning defects and corresponding control methods during spinning were studied,based on
which large thin鄄walled tubular workpieces of TC4 alloy with high precision were well formed. The results show that
spinning pass and deformation ratio can obviously affect quality of workpieces,increasing spinning pass and excessive
deformation ratio tend to decrease precision. Spinning defects,such as diameter and wall thickness error,backward ex鄄
trusion,bulge,can be effectively solved.