基于有限元方法的纵切机床自适应同步回转导套机构的优化设计

Optimization design of adaptive synchronous ratary guide sleeve mechanism of Swiss type machine tool based on finite element method

针对数控纵切机床中普通导套机构无法实时消除由棒料直径公差引起的导套与棒料之间存在间隙,加工工件易产生挠曲变形的问题,优化设计了一种自适应同步回转导套机构:通过ABAQUS建立弹簧夹头的有限元模型并进行仿真,得到多项式拟合曲线,将拟合曲线与Matlab中的Fmincon优化算法结合,确定了碟形弹簧的结构参数,从而使工件的挠曲变形程度降低了35.71%.

Abstract：For CNC Swiss type machine tool, conventional guide sleeve mechanism can not eliminate the gap between the guide sleeve and the bar material which is caused by the diameter tolerance of the bar material in real time, and brings problem of bending deformation of machining workpieee. The research came up with a kind of adaptive synchronous rotary guide mechanism in optimization design： By ABAQUS software, the research established finite element model about spring collect and simulation and obtained polynomial fitting curve. Then fitting curve was combined with the Fmineon optimization algorithm in Matlab to determine the structure parameters of the disc spring. Compare to conventional guide sleeve, the deflection of the workpieee was reduced by 35.71%.