基于MQL的超声椭圆振动微切削Inconel718的机理研究

Research on Ultrasonic Elliptical Vibration Micro-cutting Inconel718 Based on Minimum Quantity Lubrication

研究不同切削条件下的超声椭圆振动(Ultrasonic elliptical vibration,UEV)对Inconel718微切削性能的影响规律,讨论微量润滑(Minimum quantity lubrication,MQL)和UEV切削对加工性能的影响机理。针对微量润滑切削时的不同喷嘴角度,提出一种新的换热模型,利用软件对Inconel718微切削的切削力、切削温度进行了仿真研究,并通过试验对不同喷嘴角度下的切削温度的进行了对比,探讨不同喷嘴角度对UEV切削条件下加工性能的影响。研究结果表明,与常规切削相比,UEV切削可降低切削力、切削温度,超声椭圆振动微量润滑切(UEV+MQL)效果明显,喷嘴角度为0°条件下超声振动微切削Inconel718的切削温度降低效果最为明显。

The performance of Inconel718 steel when ultrasonic elliptical vibration(UEV) micro-cutting with different cutting conditions is investigated. The purpose of this study is to investigate the influence of minimum quantity lubrication(MQL) and UEV cutting on machining performance compared with conventional turning(CT). And a new heat transfer mode is proposed for different nozzle angles. The cutting force and cutting temperature of Inconel718 micro-cutting are simulated by software, and the cutting temperature under different nozzle angles is compared through experiments. The effects of different nozzle angles on the machining performance are compared under UEV cutting condition. The cutting force, Mises stress, temperature, and the tool stress are explored. It is found that UEV cutting has lower cutting force, stress, and temperature compared with CT, UEV and MQL coupling turning(UEV+MQL)has better performance and the cutting temperature of ultrasonic elliptical vibration(UEV) micro-cutting Inconel718 is significantly reduced when the nozzle angle is 0°.