木窗双端复合精铣加工机床刀轴优化设计

Optimal Design of Cutter Shaft of Double End Compound Milling Machine Tool for Wooden Window

欧式木窗截面结构复杂,可利用双端复合精铣机床,以3根刀轴安装不同刀具进行木窗的加工。其中主铣型刀轴功率最大,体积最大,其性能好坏对木窗的加工质量具有较大的影响。为提高该轴的刚度,同时降低制造成本,通过计算切削力与切削功率,选择合适的电主轴,并基于ANSYS Workbench中的直接优化算法,以主铣型刀轴的轴伸各尺寸为输入参数,最大变形量、质量和体积为输出参数,对刀轴轴伸进行优化设计。结果表明:经过优化设计后的刀轴一阶固有频率为2019 Hz,静刚度增加10%,质量和体积减少2%,机床性能显著改善。

The section structure of European style wooden window is complex.It could processed by a double end composite finishing milling machine tool,which equipped with.Three cutter shafts to install different cutters.The cutter shaft for the main milling type had the largest power and volume.The performance of the shaft had a greater impact on the processing quality of the wooden window.The cutter shaft extension is optimized to improve the stiffness of the shaft and reduce its manufacturing cost by calculating the cutting force and cutting power,the selection an appropriate electric spindle,and based on the direct optimization algorithm in the ANSYS Workbench,each dimension of the main milling cutter shaft extension was selected as the input parameter,and the maximum deformation,mass,and volume were taken as the output parameters.The results showed that the first natural frequency of the cutter shaft after optimization design was 2019 Hz,the static stiffness increased by 10%,and the mass and volume reduced by 2%,which successfully improved the performance of the machine tool.