刀轴侧倾角对薄壁叶片加工变形的影响

加工变形是决定薄壁叶片加工质量和加工效率的主要因素。针对薄壁叶片加工中出现的变形问题，分析了铣削加工中的刀轴倾角，建立了刀具-工件切削力系统下的工件变形模型，并预测加工后薄壁叶片的变形规律。以控制加工变形为目标，为叶片加工规划了合适的刀具路径和加工工艺。设置不同侧倾角的对比实验，测量了切削力和加工变形，并对测量结果进行了分析。实验结果表明，薄壁叶片的实际变形规律与模型预测的结果一致，15°~20°为较优的刀轴倾角。

Effect of Inclination Angle of Cutter Shaft on Machining Deformation of Thin-walled Blade

Machining deformation is the main factor to determine the machining quality and efficiency.For the machining deformation of thin-walled blade,the inclination angle of cutter in milling is analyzed.A deformation model of cutter-workpiece cutting force system is proposed,which can be used to predict the deformation of thin-walled blade.The appropriate tool paths and processing technics are planned to control the machining deformation of thin-walled blade.Contrast experiments of machining aluminium alloy 7075 at different inclination angles are carried out,and the cutting force,residual stress and machining deformation are measured and analyzed.The result shows that the actual deformation law of thinwalled blade is consistent with the predicted results,and the optimal inclination angle of cutter is 15°-20°.