氮化硅陶瓷ELID磨削预修锐与氧化膜成膜的影响因素  

Influence factors of pre-dressing and oxide film forming when ELID grinding silicon nitride ceramic

作　　者：万林林[1] 刘志坚[1] 邓朝晖[1] 刘伟[1] 

机构地区：[1]湖南科技大学,难加工材料高效精密加工湖南省重点实验室,湖南湘潭411201

出　　处：《金刚石与磨料磨具工程》2017年第2期55-61,共7页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51405152);湖南省自然科学基金(2017JJ2092)

摘　　要：针对氮化硅陶瓷回转曲面零件高效低损伤的加工要求,设计适用于回转面加工的在线电解修整(ELID)磨削实验装置,在数控坐标磨床上进行预修锐实验。基于平行电极电解池模型,建立预修锐时间与氧化膜成膜厚度的关系模型,分析占空比和极间间隙对成膜效果的影响规律。结果表明:工艺参数对预修锐时间的影响程度依次为占空比>电解液流量>砂轮转速>脉冲频率。采用田口方法获得最优工艺参数组合为占空比0.75,脉冲频率50kHz,砂轮转速9 000r/min,电解液流量1.0L/min。According to the machining requirements of high efficiency and low damage of silicon nitride ceramic rotary surface parts, an electrolytic in-process dressing（ELID） grinding experiment device is designed, which is suitable for rotary surface machining. Pre-dressing experiment is carried out on CNC coordinate grinder. Based on the parallel electrode electrolytic cell model, a model of the relationship between pre dressing time and oxide film thickness is established, and the influence of the duty cycle and the pole clearance on the film formation is analyzed as well. Results show that duty cycle influences pre-conditioning time most, followed by electrolyte flow rate, grinding wheel speed and pulse frequency. In conclusion, the optimal process parameters are duty cycle 0.75, pulse frequency 50 kHz, wheel speed 9 000 r/min, and electrolyte flow rate 1.0 L/min through Taguchi method.

关 键 词：ELID磨削 工程陶瓷 预修锐:氧化膜 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] TH145[一般工业技术—材料科学与工程]