共查询到19条相似文献,搜索用时 187 毫秒
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介绍了具人良好人机交互界面的逆变式电火花加工脉冲电源参数的键盘设定及显示、等电流脉宽加工脉冲的产生、加工电流峰值设定的单片机控制方法,并针对单片机系统极端恶劣的工作环境,阐述了抗干扰的软件和硬件措施。 相似文献
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分析了高速电火花小孔加工对脉冲电源的要求,研制出一种新型脉冲电源--组合式高速电火花小孔加工脉冲电源。该电源采用模块化的设计思想,把电源划分成若干个模块,通过对功能模块的不同组合,使电源可以工作在等电池脉宽或晶体管控制的CR脉冲电源方式。 相似文献
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分析了高速电火花小孔加工对脉冲电源的要求 ,研制出一种新型脉冲电源——组合式高速电火花小孔加工脉冲电源。该电源采用模块化的设计思想 ,把电源划分成若干个模块 ,通过对功能模块的不同组合 ,使电源可以工作在等电流脉宽或晶体管控制的 RC脉冲电源方式 相似文献
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脉冲电源是微细电加工的一个重要研究方向,其性能指标直接影响加工精度和表面质量,从微细电火花加工和微细电解加工用的脉冲电源两方面出发,介绍其主要研究方向及国内外发展现状,并详细分析了其工作原理. 相似文献
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An analogue wattmeter has been developed for direct measurement of electrical power dissipation at the discharge gap during electrical discharge machining (EDM). A microcomputer samples power and corresponding gap voltage at regular intervals. Digitally encoded waveforms, which represent blocks of continuous power and voltage pulse trains, are stored on floppy disks for subsequent display and analysis. The advantage of using this microcomputer-based integrated measurement system is the ability to capture both typical and random events or phenomena in EDM and also to extract and process information from the digitized waveforms which represent characteristics of these events.In this investigation, samples of power and voltage pulse characteristics during four EDM tests have been recorded, analysed for unit and time-averaged variations and meticulously studied with the aid of the microcomputer-based system. Power and voltage waveforms have been reconstructed from the digital data and are suitably displayed. Random and systematic or cyclic variations as shown by the analysed data, together with the corresponding reconstructed waveforms, are presented. Reasons for the variations are discussed in the light of similar observations verified by other researchers.This paper reports part of a continuing programme involving the use of microcomputer-based measurement systems for both on-line monitoring and off-line analysis of the EDM process. 相似文献
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针对精微电火花加工原理的实验研究,设计了一套用于精微电火花加工实验的多模式装置。该装置主要基于STM32系列微控制器,设计了RC脉冲、等频率脉冲、等电流宽度脉冲3种脉冲电源模式和峰值电压检测、峰值电流检测、击穿延时检测3种间隙状态检测模式。整体电路结构较简单,扩展性好,且能灵活切换各种模式,其最小脉冲宽度设计值为100ns。 相似文献
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将先进的电力电子器件应用于电火花加工脉冲电源,改变了传统电火花加工脉冲电源参数选择的理念,提出了从根本上改变电源结构的一种新思路.此电源适用于加工不同的材料,可提高脉冲电源的能量利用率和加工效率,降低能耗. 相似文献
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SeongMin Son HanSeok Lim A.S. Kumar M. Rahman 《Journal of Materials Processing Technology》2007,190(1-3):73-76
Micro EDM is one of the most powerful technologies which are capable of fabricating micro-structure. However, there are many operating parameters that affect the micro EDM process. Since the EDM is basically a thermal process, the supplying electrical condition can be an important factor. The conditions generally consist of several parameters such as electrical current, voltage, pulse duration, spark gap, and others. Those are decisive in removal rate, wear rate, and machining accuracy, which are characteristics of EDM. In this study, the influences of EDM pulse condition on the micro EDM properties were investigated. Voltage, current, and on/off time of the pulse were selected as experimental parameters based on a simple equation for the material removal rate. The pulse condition is particularly focused on the pulse duration and the ratio of off-time to on-time, and the machining properties are reported on tool wear, material removal rate, and machining accuracy. The experimental results show that the voltage and current of the pulse exert strongly to the machining properties and the shorter EDM pulse is more efficient to make a precision part with a higher material removal rate. 相似文献
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