Surface Morphology Characteristics and Effectiveness Analysis of Ultrasonic Longitudinal Torsion Assisted Milling of Titanium Alloys

doi:10.3969/j.issn.1004-132X.2023.06.006

Abstract

Abstract: In order to solve the problems that the surface quality of difficult-to-cut titanium alloy materials was difficult to be controlled in milling， a combination of ultrasonic longitudinal-torsional vibration and milling was proposed， and the experimental platform of ultrasonic longitudinal-torsional milling system was built. A single factor test was carried out from four aspects of cutting speed， feed per tooth， cutting depth， and ultrasonic amplitude， and the surface textures and roughnesses of ultrasonic longitudinal-torsional milling and ordinary milling were compared and analyzed. It is found that the surface textures produced by ultrasonic longitudinal-torsional milling were uniform， while the common milling has obvious adhesion phenomena accompanied by scale-spikes. The surface roughness values of ultrasonic longitudinal-torsional milling are obviously lower than that of ordinary milling， and it is concluded that the higher the speed， the larger the amplitude and the smaller the surface roughness value during ultrasonic longitudinal-torsional milling. The simulation and experiments were contrasted and effectively analysed for the feed per tooth， which has a great influence on the surface topography. The results show that the trends of experiment and simulation are consistent and have a high degree of agreement with the theoretical analysis， and the relative errors of ultrasonic longitudinal-torsional milling are lower than that of ordinary milling， and the quality of ultrasonic surface milling is obviously higher than that of ordinary milling.

Key words: , ultrasonic longitudinal torsional vibration, milling, surface morphology, effectiveness analysis

摘要： 针对钛合金难加工材料在铣削加工过程中表面质量难以控制的问题，提出将超声纵扭复合振动与铣削加工相复合，搭建超声纵扭铣削系统试验平台。从切削速度、每齿进给量、切削深度、超声振幅4个方面进行单因素试验，对比分析超声纵扭铣削和普通铣削加工表面纹理和表面粗糙度，发现超声纵扭铣削产生的表面纹理规则均匀，而普通铣削存在明显的粘连现象并伴有鳞刺产生，超声纵扭铣削时表面粗糙度值明显低于普通铣削加工时表面粗糙度值，进而得出超声纵扭铣削时速度越大、振幅越大，表面粗糙度值越小的结论。重点对表面形貌影响比较大的每齿进给量进行了仿真与试验的对比及有效性分析，结果表明，试验结果与仿真结果趋势一致，与理论分析结果具有较高吻合度，超声纵扭铣削加工的相对误差低于普通铣削加工相对误差，表面加工质量明显高于普通铣削加工表面质量。

关键词: 超声纵扭振动, 铣削, 表面形貌, 有效性分析

CLC Number:

TG146

LI Fengqin, ZHAO Bo, HAO Wangshen, WANG Xiaobo. Surface Morphology Characteristics and Effectiveness Analysis of Ultrasonic Longitudinal Torsion Assisted Milling of Titanium Alloys[J]. China Mechanical Engineering, 2023, 34(06): 677-684，693.

李凤琴, 赵波, 郝旺身, 王晓博. 超声纵扭铣削钛合金表面形貌特性及有效性分析[J]. 中国机械工程, 2023, 34(06): 677-684，693.

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