陶瓷刀具高速干切削加工数值仿真研究

Numerical Simulation and Research for Ceramic Cutting Tools High Speed Dry Cutting Processing

陶瓷刀具在高温作用下会产生自润滑现象,可起到减摩、抗磨作用。论文以Al2O3陶瓷刀具为例,在高温下刀具表面产生自润滑薄膜,利用有限元分析软件DEFORM-3D,建立高速切削AISI——1045模型,分析Al2O3陶瓷刀具在高速切削加工时,产生自润滑现象所需切削速度,以及在高速切削时,刀具表面的主切削力、应力分布、温度分布和刀具的磨损状态等。研究表明:当切削速度为270m/min,时,刀具表面温度高达842℃,能够产生自润滑现象。

Ceramic cutting tools at high temperature can produce self-lubricating phenomenon,which can play a frictio n and anti-wear effect role.In this paper,take the Al2O3ceramic cutting tool for an example.In the high temperature situation,the surface of tool can produce the self-lubricating film.With the help of finite element analysis DEFORM-3D,building a HSM cutting AISI-1045 model,for seeking for the speed of the lubrication phenomenon which can produce the self-lubricating phenomenon and researching for cutting the principal cutting force、 stress distribution、 the temperature distribution on the rake face and tool wear state,etc.Research shows that： when cutting speed is 270 m/min,the temperature of cutting tool surface is as high as 842 ℃,which can produce self-lubricating phenomenon.