Multi-objective optimization of discharge parameters for surface integrity in micro EDM
微细电火花加工中放电参数对表面完整性的多目标优化

摘要

微细电火花加工中，放电参数对表面完整性具有显著影响，涉及表面粗糙度、残余应力及显微硬度等关键指标。通过多目标优化方法，系统分析峰值电流、脉冲宽度、脉冲间隔等参数对表面质量的影响规律，并建立放电参数与表面完整性指标的数学模型。研究揭示了参数间复杂的交互作用机制，结合遗传算法求解多目标优化问题，获得兼顾加工效率与表面质量的参数组合。优化结果为微细电火花加工工艺参数的合理选择提供了理论依据，有助于提升工件的综合性能。

Abstract

In micro-EDM, discharge parameters significantly influence surface integrity, including key indicators such as surface roughness, residual stress, and microhardness. By employing multi-objective optimization methods, the study systematically analyzes how peak current, pulse width, and pulse interval affect surface quality. It also establishes a mathematical model linking discharge parameters to surface integrity indicators. The research reveals the complex interaction mechanisms among these parameters and uses genetic algorithms to solve multi-objective optimization problems, resulting in parameter combinations that balance processing efficiency with surface quality. This optimization provides a theoretical basis for the rational selection of micro-EDM process parameters, which helps enhance the overall performance of the workpiece.