高速端铣刀刀体弹性极限转速的理论计算及其影响因素

Theoretics calculate of the elasticity limited rotary speed of the high speed face milling cutter body and study its influence factors

建立高速端铣刀刀体力学模型,对在高速旋转中其只受离心力作用下的刀体弹性极限转速进行理论分析,在此基础上分析研究刀体外径、内孔尺寸及材料特性对高速端铣刀弹性极限转速的影响,并计算分析淬硬钢、铝合金及颗粒增强钛基复合材料Cerme TiC-10三种材料刀体弹性极限转速。分析研究结果表明,刀体弹性极限转速随着刀体材料sσ/ρ值的增大而提高,随着泊松比的增大而略微降低,随着刀体外径、内孔尺寸的增大而降低。

The mechanics model of the body of the high speed milling cutter is established, the elasticity limited rotary speed of the cutter body is studied only under the function of the centrifugal during the high speed rotation, and the influence of the geometry size and material of the cutter body on the elasticity limited rotary speed of the high speed face milling cutter is mainly studied. Analyze the elasticity limited rotary speed of the cutter body which is made by the steel, the Aluminum alloy and Cerme TiC-10.The result show that the elasticity limited speed will improved with increasing the value of σs/ρof the material, and the limited speed will be decreased with increasing the poisson＇ s ratio of the material and the geometry size of the cutter body.