CAJ | 학술논문

对单晶硅电火花加工过程中的电流爬坡式上升现象进行了研究，结果表明，爬坡式电流主要是由加工过程中接触电阻的变化引起的，而接触电阻主要由高温区的接触面积决定。对爬坡式电流曲线的性质进行了研究，分析了温度、热导率和相变能量对接触电阻和放电电流变化的影响。最后，研究了电参数对加工效率的影响，结果表明采用大脉宽、高电压和小占空比能够大大提高加工效率。
대단정규전화화가공과정중적전류파파식상승현상진행료연구，결과표명，파파식전류주요시유가공과정중접촉전조적변화인기적，이접촉전조주요유고온구적접촉면적결정。대파파식전류곡선적성질진행료연구，분석료온도、열도솔화상변능량대접촉전조화방전전류변화적영향。최후，연구료전삼수대가공효솔적영향，결과표명채용대맥관、고전압화소점공비능구대대제고가공효솔。
The phenomenon of climbing type current in semiconductor EDM was studied.Results show that the main influence factor that leads to the climbing type current is the changes of the con-tact resistance.The value of contact resistance is decided by the contact area of the high-temperature region.Properties of climbing type current curve were researched and the influences of temperature, thermal conductivity and phase change energy on contact resistance and current were discussed.At last,the influences of electric parameters on the machining process were researched.It is found that big pulse width,high voltage and small duty ratio can increase the processing efficiency greatly.