Influence of Process Parameters on Microhardness of Machined Surface in Ultrasonic Vibration Milling of Titanium Alloy
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摘要: 超声振动铣削是一种公认的先进切削技术，在难加工材料铣削方面具有独特的优势。然而超声振动铣削优势的发挥程度与工艺参数的选择密切相关。表面显微硬度是零件表面质量的重要衡量指标，直接影响到零件的耐磨性和使用性能。为了充分揭示超声振动铣削的工艺参数对表面显微硬度的影响规律，本文通过给工件施加超声振动的方式，开展了不同振动方向下的TC4钛合金超声振动侧铣平面试验，分析了振动方向、振幅、铣削参数对加工表面显微硬度的影响规律。结果表明：法向振动铣削得到的工件表面显微硬度大于切向和轴向振动；随着主轴转速的增加3个振动方向铣削后的表面显微硬度都呈现出上升的趋势。Abstract: Ultrasonic vibration milling is an acknowledgedadvanced cutting technology, which has unique advantages formachining the difficult-to-cutting materials. However, the superiority of ultrasonic vibration milling is closely related to the process parameters. The microhardness is an important index of machined quality which influences directly the wear resistance and service performance of workpieces.In order to reveal the influence of the process parameters on the vibration milling effect, the test of ultrasonic vibration side milling of TC4 titanium alloy with different vibration action directions was carried out by applying vibration to the workpiece, and the relations of the vibration action directions, amplitude and milling parameters with the microhardness of the machined surface was analyzed. The results show that the microhardness under three vibration directions all increase with the increasing of spindle speed, and the normal ultrasonic vibration milling can achieve higher microhardness than the axial vibration milling and the tangential vibration milling.
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Key words:
- ultrasonic vibration milling /
- titanium alloy /
- vibration direction /
- machined surface /
- microhardness
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表 2 超声振动铣削表面硬化试验参数表
试验号 主轴转速/
(r·min−1)振幅/μm 每齿进给量/
(μm·z−1)进给速度/
(mm·min−1)1 1000 3.5 10 40 2 1500 3.5 6.67 40 3 2000 3.5 5 40 4 2500 3.5 4 40 5 3000 3.5 3.33 40 6 2000 2.3 6 48 7 2000 2.8 6 48 8 2000 3.5 6 48 9 2000 4.7 6 48 10 2000 5.4 6 48 11 2000 3.5 2 16 12 2000 3.5 4 32 13 2000 3.5 6 48 14 2000 3.5 8 64 15 2000 3.5 10 80 
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