基于六维力电解加工间隙在线检测试验研究

EXPERIMENTAL RESEARCH OF ON-LINE MONITORING INTERELECTRODE GAP OF ELECTROCHEMICAL MACHINING BASED ON 6D FORCES

为了实时检测加工间隙,把流体作用在阴极上的六维力作为研究参数:设计通电解液不通电、通电加工两大类工况,从定性和定量两个角度分析六维力与加工间隙之间的关系;并以平面、斜面、叶片型面三种阴极进行试验加工,用最小二乘多变元线性拟合法,分别建立平面、斜面阴极加工的六维力与加工间隙之间的关系方程式,用叶片型面加工数据对建立的关系方程式进行检验与修正,得到最终的修正关系式:分析关系式各参量之间的关系,并得到结论:在15％的误差范围内,关系式可以用于在线检测加工间隙。

Arming to on-line measuring inter-electrode gap, 6D forces acting on cathode through electrolyte are acted as research parameters. Two kinds of experimental plannings such as monitoring forces without machining current and monitoring in really machining condition are designed, and the relation between 6D forces and interelectrode gap is analyzed form quality and quantity facet respectively. Machining experiments using three kinds of cathode profile such as plane, slant and blade surface are researched, and the plane and slant equations between 6D forces and inter-electrode gap will be set up based on the principle of least square multi-variables linear iteration method. Furthermore, experimental data of blade machining are used to check up and modify the acquired equations. At last, the modified equations will be set up. The relation between each parameter in equations is analyzed and such conclution is drawn： Under 15% error range, the equation can be used to on-line monitor the interelectrode gap of ECM.