主轴-刀柄联结性能有限元接触分析

发布时间：2018-08-28 13:41

【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。
[Abstract]:Spindle-tool shank connection system is one of the weakest links in machine tools, and its connection performance is a key factor affecting the stability of cutting. Based on the contact theory and considering the normal and tangential interaction between surfaces, the performance analysis model of spindle and cutter shank connection is established. The contact separation between the cone of the tool handle and the cone of the spindle hole, the contact pressure on the cone of the tool handle and the stress distribution of the cone surface of the cutter handle are analyzed. The influence of the rotation speed on the connection performance of the spindle and the joint surface of the cutter shank is obtained. At low speed, the connection performance is stable, but at high speed, the cone of the tool handle and the cone of the spindle hole are separated obviously, the contact pressure of the tool shank drops to half of that of the rest, and the stress of the tool shank increases significantly, so it is impossible to guarantee the close contact between the two conical surfaces at this time. Spindle-tool shank connection performance loss. Finally, the validity and feasibility of the finite element contact analysis are verified by radial loading test of the spindle and cutter shank system at high rotational speed, which lays a foundation for further analysis of the connection performance of the spindle and cutter shank.
【作者单位】：北京工业大学机械工程与应用电子技术学院;
【基金】：国家自然科学基金(51375025)
【分类号】：TG502

【参考文献】