低频扭转振动辅助螺旋铣孔切削力模型研究  

Research on Cutting Force Model of Low-frequency Torsional Vibration Assisted Helical Milling

作　　者：冯勇[1,2] 周豪杰 周智远 贾晓林 秦育彦[1] 徐伟伟 FENG Yong;ZHOU Haojie;ZHOU Zhiyuan;JIA Xiaolin;QIN Yuyan;XU Weiwei(School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing 211167;School of Mechanical Engineering,Changshu Institute of Technology,Suzhou 215500)

机构地区：[1]南京工程学院机械工程学院,南京211167 [2]常熟理工学院机械工程学院,苏州215500

出　　处：《机械工程学报》2024年第5期390-402,共13页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51775260);江苏省高等学校自然科学研究(21KJB460022)资助项目。

摘　　要：晶须增强钛基复合材料因其高比刚度、比强度等优异性能,被广泛用于航空航天、车辆运输以及新能源等领域;然而,由于材料各向异性,在常规制孔加工中极易产生缺陷,限制了其大量推广和应用。为此,结合低频扭转振动的运动特点和螺旋铣削的加工特点,提出低频扭转振动辅助螺旋铣孔(低频扭振螺旋铣孔)工艺方法,并进一步推导了其切削力模型;在此基础上,开展了TiBw/TC4复合材料的铣孔实验研究,验证了切削力模型的合理性。仿真分析表明,扭振切向进给与切向每齿进给相同,扭振频率与切削频率同频时,端面合力的平均切削力峰值较常规螺旋铣孔分别下降近13.05%和13.64%。实验研究表明,低频扭振螺旋铣孔有助于减少出/入口毛刺、孔壁划痕、破碎等缺陷,并可有效降低刀具磨损;相较于常规螺旋铣孔,孔壁粗糙度降低36.29%。Whisker-reinforced titanium matrix composites are widely used in aerospace,vehicle transportation and new energy fields because of their excellent properties such as high specific stiffness and strength;however,due to the material anisotropy,defects are easily generated in conventional hole-making processing,which restricts their mass promotion and application.To this end,a new technological process of low-frequency torsional vibration assisted helical milling(LFTVAHM)is proposed,and the cutting force model is further derived by combining the motion characteristics of low-frequency torsional vibration and the processing characteristics of helical milling;on this basis,the experimental study of TiBw/TC4 composites is carried out to verify the rationality of the cutting force model.The model simulation shows that the maximum average cutting force of end face resultant force decreases by nearly 13.05%and 13.64%respectively compared with conventional helical milling when the torsional vibration tangential feed is the same as the tangential feed per tooth.Experimental studies show that,the low frequency torsional vibration helical milling helps to reduce the defects such as exit/entry burrs,hole wall scratches and crushing,and can effectively reduce tool wear;compared with conventional helical milling,the hole wall roughness is reduced by 36.29%.

关 键 词：TiBw/TC4复合材料 低频扭振 螺旋铣孔 切削力模型 制孔质量 

分 类 号：TH161[机械工程—机械制造及自动化]