Experimental study on ultrasonic assisted cutting of TB9 titanium alloy
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摘要: 钛合金作为航空紧固件的主要原材料，其加工性能直接决定了航空紧固件的服役性能，进而影响着航空装备的可靠性，改善钛合金的机械加工性能是提高航空紧固件的有效方法。文章以TB9高强钛合金为研究对象，主要对比传统切削加工和超声切削加工在主切削力、表面加工形貌以及刀具磨损特征等方面的不同，结果表明了与传统切削相比，超声切削有效降低了切削过程中的切削波动，并降低了加工中的切削力；同时超声切削引起的机械划痕深度降低了61.34 %，且随着超声振幅的增加，TB9钛合金试样的表面加工质量显著提高、硬质合金刀具的氧化磨损程度降低。Abstract: Titanium alloy is the main raw material of aviation fasteners, and its processing performance directly determines the service performance of aviation fasteners, which in turn affects the reliability of aviation equipment. Improving the machinability of titanium alloys is an effective way to improve aerospace fasteners. The research takes TB9 high-strength titanium alloy as the research object, and mainly compares the differences in main cutting force, surface machining morphology and tool wear characteristics between conventional cutting and ultrasonic cutting. The results show that compared with conventional cutting, ultrasonic cutting effectively reduces the cutting fluctuation and cutting force during the cutting processd; In addition, the mechanical scratch depth caused by ultrasonic cutting is reduced by 61.34 %. With the increase of ultrasonic amplitude, the surface processing quality of the TB9 titanium alloy sample is significantly improved. Moreover, the degree of oxidation wear of cemented carbide tools is reduced.
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