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单片微机控制的电火花加工脉冲电源,采用8031芯片及8位锁存器74LS373和程序存储器EPROM2764购成单片微机主控制器。扩展了两片8253可编程时间控制器构成了主控制线路,可以实现高、低压回路的脉宽、脉间调节,调节范围为2—9999μs,间隔为1μs;输出波形有高、低压复合,梳状波,等脉宽电波等。扩展了8255,8155可编程并行I/O接口,分别控制高、低压功效线路的功率管导通数目,以控制电火花加工放电电流的大小。加工参数可通过键盘设置,并由显示器显示。可建立加工程序的数据库供操作者选用。该脉冲电源已用于大型汽轮机喷嘴电火花加工机床,效果良好。
Single-chip microcomputer-controlled EDM pulse power supply, using 8031 chip and 8-bit latch 74LS373 and program memory EPROM2764 purchased single-chip microcomputer main controller. Expansion of the two 8253 programmable time controller constitutes the main control circuit, you can achieve high and low voltage loop pulse width, pulse regulation, the adjustment range of 2-9999μs, the interval of 1μs; output waveform with high and low pressure composite comb Like waves, such as pulse width radio waves. Expansion of the 8255, 8155 programmable parallel I / O interface, respectively, control the high and low voltage power line power tube turn-on number to control the size of EDM discharge current. Machining parameters can be set by the keyboard and displayed by the display. A database of machining programs can be created for operator selection. The pulse power has been used for large turbine nozzle EDM machine, the effect is good.