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二维超声复合电解/放电展成加工试验研究

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为了提高铝基复合材料的表面成型质量和加工效率,提出了应用低电压、低电流密度的二维超声复合电解/放电展成加工(2UE/DM)技术.利用镀覆金刚石磨粒的工具侧面对复合材料进行 3 种不同工艺对比试验和 3 组参数下的性能试验,测量了铝基陶瓷增强复合材料(SiCp/Al)在质量分数 0.5%的NaNO3 溶液中展成加工时的电流、材料去除率(MRR)和表面粗糙度,探究了工具转速、电压和振幅对加工效率和质量的影响.结果表明,工件振动周期性改变加工间隙,单位周期内的放电频率增加了 2 倍;5000 r/min时放电频率减少,而表面粗糙度比 1000 r/min降低了 13.2%;在电压为 6 V时,材料去除率达到 0.89 mm3/min,比 3 V电压时增加 45.9%,但较高电压导致裸露更多增强颗粒,比 3 V时的表面粗糙度高出 1.4 μm;振幅增至 5 μm时,表面粗糙度比 2 μm时降低了 17.5%,具有较高的加工质量.
Experimental Study of Two-Dimensional Ultrasound Combined Electrolysis/Discharge Generating Machining
To improve the surface forming quality and machining efficiency of aluminum matrix composites,a two-dimensional ultrasonic combined electrolysis/discharge generating machining technology(2UE/DM)with low voltage and low current density was proposed.Using the side of a tool coated with diamond grains,three different processing contrast tests and performance tests under three sets of parameters were carried out on the composite.The current,material removal rate(MRR)and surface roughness of SiCp/Al composites processed in 0.5%NaNO3(mass fraction)solution were measured,and the effects of tool rotation speed,voltage and amplitude on processing efficiency and quality were explored.The results showed that the vibration of the workpiece periodically changed the machining gap,and the discharge frequency increased by 2 times per vibration period.At 5000 r/min,the discharge frequency decreased,the surface roughness decreased by 13.2%compared with 1000 r/min.At the voltage of 6 V,the material removal rate reached 0.89 mm3/min,which was 45.9%higher than 3 V,but more reinforcing particles were exposed at the higher voltage,and the surface roughness was 1.4 μm higher than 3 V.When the amplitude increases to 5 μm,the surface roughness was 17.5%lower than 2 μm,and the technology had higher machining quality.

Two-dimensional ultrasoundElectrolysis/dischargeCombined machiningSurface qualityMaterial remove rate(MRR)

李晶、陈湾湾、朱永伟

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扬州大学,扬州 225127

二维超声 电解/放电 复合加工 表面质量 材料去除率(MRR)

国家自然科学基金国家自然科学基金江苏省研究生集萃研究计划资助(2021-2022)

5217543851775484

2024

航空制造技术
北京航空制造工程研究所

航空制造技术

CSTPCD北大核心
影响因子:0.403
ISSN:1671-833X
年,卷(期):2024.67(13)
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