超高速, CBN砂轮, 结构优化, 有限元法

An optimization objective was set up to control the radial displacement and to reduce the equivalent stress of the super high-speed grinding wheel. By established models for the connection between inner micro-unit's displacement and stress of wheel base, strength check of the theoretical formula about variable cross-section wheel was also established. A finite element analysis method was used to optimize wheel base type and material. The wheel pneumatic power and flow field temperature under ultra-high speed situation were also analyzed. Taking into account the characteristics of segment wheel, wheel segments number and thickness were optimized. The study has shown that the hyperbolic-type titanium alloy base wheel has a clear advantages to restrain the radial expansion and the average equivalent stress of wheel while its segments number and size have proper certain optimization value.