Abstract
CuCr1Zr alloy plays an important role in aerospace, energy, electronics and other fields. Due to its excellent properties, the cutting of CuCr1Zr alloy has also become one of the research hotspots. In order to obtain better machining quality at lower cost, a kind of machining system of longitudinal torsional composite ultrasonic vibration assisted turning (LT-UAT) is designed in this paper. The combination of longitudinal vibration and torsional vibration is realized by using vibration mode conversion screw (VMCS). The turning experiments of CuCr1Zr alloy with and without ultrasonic vibration are carried out, and the effects of process parameters on surface quality and chip shape (CS) are studied. The results show that lower surface roughness (SR), better surface topography (ST) and CS can be obtained when the LT-UAT of CuCr1Zr alloy with reasonable process parameters. The optimal combination of process parameters (OCPP) is ultrasonic amplitude of 45 µm, cutting speed of 30 m/min, cutting depth of 0.1 mm, and feed speed of 0.1 mm/rev. When selecting process parameters in actual machining, the closer to the above OCPP, the better. This research helps to promote the development of ultrasonic machining technology, and also promotes the application of CuCr1Zr alloy in more fields.
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