超声振动下钛合金高压冷却切削力分析实验

Experiment on Cutting Force Analysis of Titanium Alloy under High Pressure Cooling by Ultrasonic Vibration

钛合金具备热导率小与比热容大的特点,对其进行切削加工时较易引起粘刀的现象,从而在切削阶段发生温度的明显升高引起合金软化的问题,无法保证高精度加工的要求。基于此,设置了合适的切削参数取值区间,开展超声振动下钛合金高压冷却切削力分析实验。研究结果表明:当切削速度提高后获得了更大切削力,处于较小切削速度下时,超声振动切削时达到了更强分离性能,获得比普通切削力降低40%效果。进入更深区域后,切削力明显升高,超声振动切削力减小幅度与切深保持稳定。超声振动切削获得更优降力性能,获得了比常规切削方式更大的作用力。

Titanium alloy has the characteristics of small thermal conductivity and large specific heat capacity,which is easy to cause the phenomenon of sticking knife when cutting,so that in the cuting stage,the temperature rises significantly and causes the problem of alloy softening,which is unable to ensure the requirements of high-precision machining,based on which,we set up a suitable interval of the value of the cuting parameters,and carry out the experiment of high-pressure cooling cutting force analysis of titanium alloy under the ultrasonic vibration.The research results show that:when the cutting speed is increased to obtain a greater cutting force,at a smaller cutting speed,ultrasonic vibration cutting to achieve a stronger separation performance,obtain than ordinary cutting force reduction of 40%effect.After entering the deeper area,the cutting force increased significantly,and the reduction of ultrasonic vibration cutting force remained stable with the depth of cut.Ultrasonic vibration cutting obtains better force reduction performance,and obtains a larger force than the conventional cutting method.