不同壁厚热缩刀柄夹持力的研究

Study on Holding Force of Shrink Toolholder with Different Thickness of Wall

基于对热缩刀柄—刀具配合夹持状态的理论研究,利用有限元软件ANSYS对两种不同壁厚HSK热缩刀柄—刀具配合在不同转速、相同初始过盈量下的夹持力进行仿真对比分析。对比分析表明:随着主轴转速的增加,热缩刀柄—刀具配合的接触压力总体下降,但最大接触压力有升高趋势;离心力对3°薄壁刀柄夹持力的削弱作用并不明显,离心力与初始过盈量共同作用影响夹持力的大小;相同主轴转速下,4.5°厚壁刀柄的接触压力大于薄壁刀柄。通过分析壁厚因素对夹持力的影响趋势,可对热缩刀柄的使用给出指导。

Based on the theoretical analysis of contacting condition between shrink toolholder and tool,a simulation analysis for the contact pressure of the coupling system of two different kinds of HSK shrink toolholder and tool at different rotating speed is carried out by using the finite element software ANSYS.Comparing with simulation results,one can find that contact pressure decreases companying with increasing spindle rotating speed.Contact pressure of shrink toolholder with thicker wall is greater than that with thinner wall at the same rotating speed.The law of thickness of shrink toolholder wall influencing contact pressure will guide the use of shrink toolholder.