The work environment of wind turbines gearbox is extremely complex.The manufacturing defect which affects the high reliability and fatigue life of gear drive exists in manufacturing. On the basis of analyzing tooth profile of pre-grinding hob characteristic and heat treatment deformation situation of wind power gear

the optimization design and research of pre-grinding hob is proposed

the optimization goals in good accordance with the manufacturing conditions is established.By the use of KISSsoft software

tooth profile optimization design of hob is more simple and rapid.The tooth profile optimization research of hob provides much technological supports to working performance of wind power gear.The good results of tooth profile design and research in manufacturing of wind power gear is acquired.