摘要
针对石英硬脆性、耐高温和绝缘性的难加工特性,为实现薄壁型孔的高效穿孔成形加工,提出一种基于气流约束和柔性力反馈的套料电化学放电加工石英型孔方法,将放电域约束到工具电极端部提高加工定域性精度,并避免加工过程中工具电极碰撞薄壁石英造成的破损问题。通过性能测试和仿真研究,进而提出放电状态在线观测关联气流约束效果的工艺优化方法,得到关键工艺参数的影响规律并优选了加工参数。采用壁厚0.25 mm、外径5 mm的薄壁套管电极在厚度0.5 mm的石英薄板上实现穿孔加工,验证了工艺方法的可行性和有效性,改善加工精度的同时单孔加工效率提高至2倍。
Regarding the difficult-to-machine properties of quartz,such as its brittleness,high-temperature resistance and insulation,a novel nested electrochemical discharge machining method was proposed by integrating airflow constraint and flexible force feedback to achieve the efficient perforation and shaping of through-holes on a quartz thin sheet.The method not only confines the discharge zone to the tool-electrode tip for enhancing localization accuracy,but also prevents structural damage caused by the tool-electrode collisions during machining.Through performance testing and simulation,an online process optimization strategy was further developed by correlating real-time observation of discharge states with airflow constraint effect,and the influence of key parameters and optimized processing parameters were obtained.Using a thin-walled tubular electrode with the wall thickness of 0.25 mm and the outer diameter of 5 mm,holes were successfully achieved through a 0.5 mm thick quartz sheet,validating the feasibility and effectiveness of the proposed method.Compared to initial results,not only the machining precision was improved,but also the processing efficiency was increased by twice significantly.
作者
张益康
佟浩
陈佳龙
李勇
ZHANG Yikang;TONG Hao;CHEN Jialong;LI Yong(Beijing Key Laboratory of Precision and Ultra-Precision Manufacturing Equipment and Control,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电加工与模具》
北大核心
2025年第6期23-29,47,共8页
Electromachining & Mould
基金
清华大学机械系自由探索基金项目(2024JXA01)
清华大学第六届实验室创新基金项目(53100600624)。
关键词
电化学放电加工
石英薄板
气流约束
electrochemical discharge machining
thin quartz sheet
airflow constraint
