Finite Element Simulation and Process Optimization of TC21 Titanium Alloy Cylindrical Spinning

Finite element analysis software ABAQUS is applied to carry out finite element numerical simulation on TC21 titanium alloy cylindrical hot spinning process. The stress and deformation characteristics of titanium alloy during hot spinning process are analyzed, and the effects of spinning temperature, spindle speed, feed speed and reduction rate on cylindrical hot spinning forming performance are discussed. The results show that with the increase of spinning temperature, the maximum equivalent stress decreases and the peak value of equivalent strain increases. too high (> 890 ℃) or too low (< 860 ℃) spinning temperature is unsuitable to the outer diameter roundness accuracy of cylindrical parts. The spindle speed has no significant effect on the change of equivalent stress and strain, but it will affect the accuracy of blank wrinkling and outer diameter roundness. The spindle speed 4r/s is most suitable. With the increase of spinning feed rate or reduction rate, the area of maximum stress area and strain peak value increase. The bulge defect of spinning parts is the most serious when the feed rate is 2.5 mm/s and the reduction rate is 35%. Considering the spinning quality, it is suitable for TC21 titanium alloy cylindrical spinning to have a spinning temperature of 860 ℃, a feed speed of 1mm/s, a spindle speed of 4 r/s and a reduction rate of 20%.