基于二维超声振动辅助的钛合金切削加工分析与试验研究

针对普通切削时钛合金表面质量较差的问题，将二维超声辅助切削用于钛合金的加工过程。对钛合金的超声振动切削理论进行分析，找出影响刀具运动轨迹及切削力的因素；设计基于二维超声振动的钛合金表面切削试验，研究超声振动对切削力、工件表面形貌以及刀具寿命的影响。结果表明:与普通切削相比，二维超声振动辅助切削可以有效降低加工中的切削力，减轻加工过程对刀具的冲击，提高刀具的耐用度；且在相同加工条件下，二维超声振动加工时的切削力下降了47.7%，工件表面轮廓平均高度减小了40.9%，刀具的使用寿命提高了近1倍。 

Analysis and experimental research on titanium alloy cutting based on two-dimensional ultrasonic vibration assistance

To solve the problem of poor surface quality of titanium alloy in conventional cutting, two-dimensional ultrasonic assisted cutting was applied to the processing of titanium alloy. The ultrasonic vibration cutting theory of titanium alloy was analyzed to find out the factors affecting the tool path and cutting force. The titanium alloy surface cutting experiment based on 2D ultrasonic vibration was designed to study the influences of ultrasonic vibration on cutting force, workpiece surface morphology and tool life. The results show that compared with conventional cutting, 2D ultrasonic vibration assisted cutting can effectively reduce the cutting force, reduces the impact of machining process on the tool, and improves the tool life. Under the same processing conditions, the cutting force of 2D ultrasonic vibration assisted machining is reduced by 47.7%, the average height of workpiece surface profile is reduced by 40.9%, and the service life of the tool is nearly doubled.