Experimental study on multi-dimensional ultrasonic vibration milling Ti2AlNb alloy

GAO Guofu; QIAO Huai; YUAN Zhaojie; WANG Meng; WANG Xiaobo; XIANG Daohui

doi:10.16186/j.cnki.1673-9787.2022010043

Abstract：The kind of Ti2AlNb alloy is hard and brittle,and the traditional cutting process has some prob-lems of low tool durability and poor processing quality due to the high cutting heat.In this paper,a combina-tion of cutting simulation and experimental research were conducted to study the cutting characteristics of Ti2AlNb alloy through the application of two-dimensional ultrasonic vibration cutting(Two-DUVC),three-dimensional ultrasonic vibration cutting(Three-DUVC)compared to conventional cutting(CC).The results showed that the three-dimensional cutting forces in ultrasonic vibration milling were less than those in CC.The cutting forces in Two-DUVC and Three-DUVC along the tool feed direction were reduced by 48.6％and 28.3％,respectively,compared to that in CC.Three different cutting methods produced completely differ-ent surface micro-textures under the same cutting parameters.The Three-DUVC produced"wheat ears",and"wheat awns",appearing in the tool feed direction with strong ultrasonic separation characteristics.With the increasing of the spindle,the roughness value generated in the Two-DUVC was 45.3％at the maximum rela-tive to CC.As the amplitude increased,the separation of the cuttings caused by the ultrasonic vibration was enhanced,and the surface roughness value of the workpiece was reduced by 64.5％while the workpiece am-plitude in Two-DUVC was 8μm.The experimental results showed that,ultrasonic vibration machining was one of the effective means to improve the cutting performance of Ti2AlNb alloy.