不同MQL安置方式对高速精密车削的影响研究

Study for Impact of Different MQL Settlements on High-Speed Precision Turning

为比较不同的MQL安置方式对高速精密车削加工的影响,使用德国某公司的超精密机床SB-CNC对轴承钢GCr15分别进行干式、切削液外置供给式MQL以及切削液内置供给式MQL切削试验。通过Kistler加速度传感器和压电式力传感器分别对车刀在加工过程中的径向振动信号和刀尖的三向切削力信号进行采集,并对采集到的信号做时域和频域分析。结果显示,两种MQL润滑方式都对减小切削力和加工中的低频颤振有所抑制,其中,内置式MQL在抑制颤振方面比外置式MQL更有优势,二者在减小切削力能力方面则未见明显区别。

In order to research the influences MQL technique have on high-speed precision turning process ,a series of trials were carried out on ball bearing steel GCrlS, including dry turning, external feed MQL turning and internal feed MQL turning by using an ultra-precision machine called SB-CNC, respectively. The signal of radial vibration and the cutting forces of three different directions of the tool are acquired through Kistler acceleration sensor and piezoelectric transducer respectively. Then, time and frequency domain analysis are launched on those signals. The result shows that both settlements of MQL reduced cutting force and vibration in the cutting process. Internal MQL shows better performance in reducing vibration while there＇s little difference in cutting force reducing between internal and external MQL.