摘要
主轴-刀柄联接系统是机床中最薄弱的环节之一,其联结性能是影响切削加工稳定性的关键因素。基于接触理论,考虑结合面间的法向作用和切向作用,建立了主轴-刀柄联结性能分析模型。分析了不同转速下刀柄锥面与主轴孔锥面的接触分离情况、刀柄锥面承受的接触压力和刀柄锥面的应力分布情况,得出了转速对主轴-刀柄结合面联接性能的影响规律。低转速时其联接性能稳定,而高转速时刀柄锥面与主轴孔锥面发生明显分离,刀柄接触压力下降到静止时的一半,刀柄应力显著增大,此时已无法保证两锥面紧密接触,主轴-刀柄联接性能丧失。最后通过高转速下主轴-刀柄系统径向加载试验验证了有限元接触分析的有效性与可行性,从而为进一步分析主轴-刀柄连接性能打下基础。
A spindle/toolholder connection system is one of the weakest sections in a machine tool.The quality of machining is related to its connection performance.Here,a model of the spindle /toolholder system was established based on the contact finite element theory.Normal direction and tangential one actions between interfaces were considered.The taper-to-taper clearances,the taper-to-taper contact pressure and the stress of the toolholder at different rotating speeds were analyzed.It was shown that under static and low speed conditions,its connection performances are stable;however, when the rotating speed is high,the tapers of the tool holder and the spindle hole are departed,and their contact pressure is only half of that under the static condition,and the stress of the toolholder grows significantly at the same time,the connection performances get worse.Finally,tests verified the reliability of the analysis.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第21期10-14,36,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51375025)
