One ironing and three ironing deformation of QSn7-0.2 tin bronze sliding bearing blank were simulated by the Simufact software at the same ironing rate.The optimum forming process was determined by the equivalent plastic strain and equivalent stress of the sliding bearing forming part along the wall thickness as evaluated value.The results show that the equivalent plastic strain and equivalent stress of three continuous ironing are greater than that of once ironing

and the stress and strain of a ironing in the thickness of the wall is the smaller.In addition

the equivalent plastic strain of the ironing is gradually decreased from the outside to the inside

while the equivalent stress is decreased firstly and then increased.