抬刀高度和速度对电火花加工稳定性的影响机理研究  

Analysis on the Influence of Electrode Jump Height and Speed for Machining Stability in EDM

作　　者：王津[1,2] 韩福柱[1] 卢建鸣[3] 周志凯[3] 赵福令[2] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084 [2]大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024 [3]苏州三光科技股份有限公司,江苏苏州215129

出　　处：《电加工与模具》2012年第2期6-8,49,共4页Electromachining & Mould

基　　金：国家自然科学基金资助项目(50875140)

摘　　要：了解抬刀高度和速度对电火花加工稳定性的影响机理,为控制这两个参数提供了重要的理论依据。然而,由于难以观察放电间隙内的情况,目前对这两个参数的研究仅限于检测放电状态,缺乏深入的理论研究。为解决这个问题,借助透明材料,搭建了一系列实验装置,来观察间隙内加工屑的运动情况及放电状态。结果发现,抬刀高度决定可吸入底面间隙中清澈工作液的体积,抬刀速度决定底面加工屑与吸入底面的清澈工作液的混合程度。只有当抬刀高度和速度都足够大时,加工才能稳定进行。The understanding of the mechanism how the electrode jump height and speed affect the machining stability in EDM can provide important theoretical basis for establishing control strategies for electrode jump height and speed. However, to date, this mechanism was not fully understood because of the difficulty in observing the phenomenon in discharge gaps. The current study established a series of experimental devices using transparent materials to observe the discharge status and debris movemen.t in discharge gaps. The observations show that the electrode jump height determines the vol- ume of clean oil absorbed into the bottom gap, and the electrode jump speed determines the mix degree of debris and clean oil in bottom gap. When both the electrode jump height and speed were large enough, machining can keep stable.

关 键 词：电火花加工 抬刀高度 抬刀速度 加工屑 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]