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微细电火花线切割加工装置及应用 总被引:2,自引:0,他引:2
开发了一套微细电火花线切割加工装置.主要由精确可控微小放电能量的脉冲电源、加工状态在线检测与控制系统、基于压电陶瓷驱动的精密伺服控制系统和恒张力走丝系统等关键技术构成.利用直径为30μm的微细电极丝,加工出微小槽的最小宽度<38μm,表明放电间隙≤4μm,并且白层厚度<2μm,表面粗糙度Ra≤0.1μm.给出了微小齿轮以及各种各样的异型孔加工实例,证实该设备具有较广泛的实用性. 相似文献
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微细线切割电极丝形位误差分析 总被引:3,自引:0,他引:3
为评估电极丝在微细电火花线切割加工过程中受到各种力作用下产生偏移量大小,利用有限元方法,首先求取电极丝仅受丝张力的总体刚度矩阵和电极丝仅受放电力的总体刚度矩阵,然后结合这两个刚度矩阵推导受丝张力和放电力合力的总体刚度矩阵,利用电极丝总体刚度矩阵求出电极丝最大变形解析式,并在此基础上分析了电极丝变形的影响因素.分析结果表明:提高电极丝的张力和电极丝的刚性以及减小导丝器之间的跨度都可以减小电极丝形位误差;提供微小能量的脉冲电源使偏移量达到最小是最佳的选择. 相似文献
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This work deals with an experimental investigation of the machining characteristics of Micro Wire Electrical Discharge Machining (MWEDM). The MWEDM process consists of only one cutting operation yawing with machining conditions. Experimental results show that the peak current and pulse duration have an obvious influence on surface roughness and machining time, and they also have an optimum value for the highest cutting speed. The servo reference voltage influences the surface roughness and machining time as well. In particular,the surface characteristics of work-pieces and a micro wire electrode were analyzed in detail too. Utilizing a micro wire electrode with diameter 30μm, MWEDM can machine a micro slot 38μm wide, which proves that the discharge gap can be controlled not more than 4μm. It can also machine micro gears respectively with a module 40μm, thickness lmm, and a module 100μm, thickness 3.5mm. All kinds of micro shaped holes and complex micro parts can be easily machined as well. 相似文献
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Study on the servo control system of MWEDM 总被引:1,自引:0,他引:1
MWEDMhas been applied widely in industry be-cause of its capability of machining any material with e-lectrical conductivity more than 0·01S/cm without con-tact, and achieving micro parts with high machiningprecision and low surface roughness[1,2]. HoweverMWEDM is a dynamic process; it demands a highspeed, quick response servo control system to keep theoptimum discharge gap between the work-piece andwire electrode, maintain stable gap discharge states toerode the work-piece, and keep the sp… 相似文献
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