TC4低压微弧铣削接触等效面积法加工特性研究  

Research on Machining Characteristics of TC4 Low-Pressure Micro-Arc Milling Contact Equivalent Area Method

作　　者：周建平[1] 周忠祥 汪兵兵 唐伟 ZHOU Jianping;ZHOU Zhongxiang;WANG Bingbing;TANG Wei(School of Intelligent Manufacturing and Modern Industry,Xinjiang University,Urumqi Xinjiang 830017,China;School of Aeronautical,Changji University,Changji Xinjiang 831100,China;Engineering Skills Practical Training Institute,Xinjiang Institute of Engineering,Urumqi Xinjiang 830023,China)

机构地区：[1]新疆大学智能制造现代产业学院,新疆乌鲁木齐830017 [2]昌吉学院航空学院,新疆昌吉831100 [3]新疆工程学院工程技能实训学院,新疆乌鲁木齐830023

出　　处：《新疆大学学报（自然科学版中英文）》2024年第3期257-267,共11页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：国家自然科学基金“航空薄壁零件低压微弧铣削加工放电通道演化规律与变形抑制方法研究”(52265061)。

摘　　要：以钛合金Ti-6Al-4V(TC4)为研究对象,建立工艺特征参数(铣削深度、铣削宽度、电极直径)与铣削面积的数学模型,揭示了各特征参数与铣削面积的数学关系.开展电弧铣削实验,研究铣削面积对加工电流、加工质量和加工效率的影响.结果表明:特征参数的变化影响了材料蚀除速率,致使电弧放电能量发生变化,进而影响热影响层和重铸层的厚度;平均峰值电流、表面粗糙度和热影响层厚度与铣削面积呈正相关,而允许的最大进给速度与铣削面积呈负相关;直流电压20 V、铣削深度3 mm、铣削宽度2 mm、主轴转速1 000 r/min时,表面质量最佳,表面粗糙度29.31μm,热影响层厚88.24μm,材料去除率最大为4 996.2 mm^(3)/min.通过铣削面积的分析有助于后续电弧铣削加工工艺调控和优化.This paper takes titanium alloy Ti-6Al-4V(TC4)as the research object,establishes the mathematical model of process characteristic parameters(milling depth,milling width,electrode diameter)and milling area,and reveals the mathematical relationship between each characteristic parameter and milling area.Arc milling experiments were carried out to study the effect of milling area on processing current,processing quality and processing efficiency.The results show that:changes in the characteristic parameters affect the material etching rate,resulting in changes in the arc discharge energy,which in turn affects the thickness of the heat-affected layer and the recast layer;the average peak current,surface roughness value and the thickness of the heat-affected layer are positively correlated with the milling area,while the maximum permissible feed rate is negatively correlated with the milling area;under the condition of DC voltage of 20 V,the milling depth is 3 mm,the milling width is 2 mm,and the spindle speed is 1000 r/min,the surface quality is the best,the surface roughness value is 29.31μm,the thickness of heat-affected layer is 88.24μm,and the maximum material removal rate is 4996.2 mm^(3)/min.It is proved that the analysis of the milling area is more helpful for the subsequent arc milling machining process regulation and optimization.

关 键 词：电弧铣削 钛合金TC4 特征参数 铣削面积 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] TG54