基于电塑性-超声振动耦合作用的钛合金车削实验研究

Research on turning of titanium alloy based on the electro-plastic-ultrasonic vibration coupling effect

基于电塑性-超声振动耦合作用的钛合金车削技术,分别设计了钛合金普通车削实验、超声振动辅助车削实验及电塑性-超声振动耦合辅助车削实验。结果表明:与普通车削相比,超声振动辅助车削切削力降低,表面质量改善不明显,电塑性-超声振动耦合辅助车削的切削力在超声振动辅助车削的基础上进一步降低,并且表面质量较前两种方式有了明显的改善。分析了放电电压及放电频率对电塑性-超声振动耦合辅助车削切削力及表面质量的影响,发现选取较大的放电电压及较高的放电频率,可降低切削力并获得较好的表面质量。

The titanium alloy turning technique based on the electro-plastic ultrasonic- vibration coupling effect is proposed. Tests for conventional turning （CT）, ultrasonic-vibration assisted turning （UAT） and electro-plastic ultrasonic-vibration assisted turning（EUAT）of titanium alloy are carried out. Comparing with CT, the cutting forces decreases a little in UAT, while decreases obviously in EUAT. It also turns out that compared with CT, the surface quality is not a noticeable change in UAT but a effectively improvement in EUAT. The effects of discharge voltage and discharge frequency on the cutting force and surface quality of EUAT are investigated. The experimental also reveals that a larger discharge voltage and a higher discharge frequency are imperative to reduce the cutting force and obtain a better surface quality.