Research on cutting force and surface integrity of TC18 titanium alloy by longitudinal ultrasonic vibration assisted milling

In order to study the influence of spindle speed and amplitude on surface integrity, TC18 titanium alloy samples were milled by process conventional milling longitudinal ultrasonic vibration assisted milling. The experimental data obtained dynamometer, thermometer, scanning electron microscope, X-ray diffractometer, three-dimensional topography instrument for observation analysis. results show that has a significant effect cutting force, temperature, morphology, residual stress. Compared with milling, micro-texture produced is more regular, force temperature can be reduced 34.1% 19.5%, respectively. Then, compressive stress roughness increased 50.9% 163.88%, addition, certain depth plastic deformation layer formed under machining, increases increase amplitude, when 4 μm, reach about 5.2 μm. This lays theoretical foundation further research optimization technology difficult machining materials.