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目前,在电加工机床中出现了所谓“低耗损电源”。这些“低耗损电源”的特点是脉冲宽度宽,与过去的脉冲宽度窄频率高的电源(脉冲方式)正好相反。实际的线路虽各有不同,但从加工性能来看,与短脉冲方式电源相比较却有如下显著相同的5点: (1)加工间隙较大,在0.1～0.5毫米的范围内。十几年来,电加工机床主要是“短脉冲方式”,间隙在0.01～0.1毫米之内,其粗加工最大间隙也只不过0.15毫米。但是,“低耗损电源”的加工间隙要在0.1毫米之内,如0.01毫米这样微小的加工间隙是很困难的。 (2)“低耗损电源”的加工速度比之性能较好的“短脉冲方式”的电源要慢,每分钟加工量大约是其1/2～1/5,特别是加工表面光洁度在10μHmax以内时,加工速度更低。
At present, the so-called “low-loss power supply” appears in the electric machine tool. These “low-loss power supplies” feature a wide pulse width, just the opposite of the narrow-frequency high-power (pulsed mode) pulse of the past. Although the actual lines are different, but from the processing point of view, compared with the short pulse mode power supply has the following significant 5 points as follows: (1) larger processing gap, in the range of 0.1 ~ 0.5 mm. More than 10 years, EDM machine is mainly “short pulse mode”, the gap is within 0.01 ~ 0.1 mm, the maximum gap of roughing is only 0.15 mm. However, the machining gap of “low-loss power supply” is within 0.1 mm, and the slight machining gap such as 0.01 mm is very difficult. (2) “Low-loss power supply” processing speed slower than the better performance of the “short pulse mode” power supply, the processing volume per minute is about 1/2 ~ 1/5, especially the processing surface finish within 10μHmax When processing speed is lower.