摘要
采用由氧气浓度大于氮气浓度组成的混合气体与水经过雾化形成的雾化介质,通入中空旋转电极进入极间放电进行混合气体雾化放电烧蚀铣削加工,利用介质中的氧气介质与放电形成的熔融材料发生剧烈的化学反应释放热能快速实现钛合金高效蚀除,而介质中的氮气和水降低氧气浓度,实现放电加工过程的稳定性;通过单因素试验研究加工工艺参数对材料去除率等工艺指标的影响。结果显示:在相同条件下,混合气体雾化烧蚀铣削加工的材料去除率是空气雾化放电铣削加工的3倍以上,在小电流加工条件的过切量小于空气雾化放电加工;在放电烧蚀铣削加工钛合金时,材料去除率随着放电电流、脉冲宽度及气体压力的增加而增加。
The atomizing medium formed by mixing gas and water,which is composed of oxygen concentration greater than nitrogen concentration,is passed into the hollow rotating electrode and discharged into the electrode for mixing gas atomization discharge ablation milling.The use of oxygen medium in the medium and the molten material formed by the discharge of intense chemical reaction to release heat energy quickly to achieve high efficiency corrosion of titanium alloy,and nitrogen and water in the medium to reduce the oxygen concentration to achieve the stability of the entire discharge process.The influence of processing parameters on material removal rate and other process indexes was studied by single factor experiment.The experimental results show that the material removal rate of mixed gas atomization ablation milling is more than 3 times that of air atomization discharge milling under the same conditions,and the overcutting size of the former under the condition of low current machining is less than that of air atomization discharge milling.The experimental results show that the material removal rate increases with the increase of discharge current,pulse width and gas pressure during discharge ablation milling.
作者
邹敏晔
何子正
孔令蕾
余思琪
柳凯
雷卫宁
ZOU Minye;HE Zizheng;KONG Linglei;YU Siqi;LIU Kai;LEI Weining(School of Mechanical Engineering,Jiangsu University of Technology,Changzhou 213001,China)
出处
《电加工与模具》
2023年第3期26-30,35,共6页
Electromachining & Mould
基金
国家自然科学基金项目(52205470,519752640)
江苏省高等学校大学生创新训练计划项目(202211463004Z)
常州市科技计划项目(CJ20220075)。
关键词
钛合金
混合气体
雾化介质
烧蚀铣削加工
titanium alloy
mixed gas
atomization medium
discharge ablation milling
