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我厂试制的D30～1型电火花成型加工机床,主轴头采用电液伺服阀控制。经过近一年的实践证明:电液伺服阀比传统的喷嘴挡板控制灵敏度高、放大倍数大、使用压力范围大、主轴调速范围大,稳定性好、寿命长。用电液伺服阀作为控制元件,对于各种情况下的加工都得到了满意的效果。例如:用φ0.03mm的钨丝打出了小孔;用断面积为365×285mm~2的铸铁电极在淬火钢上打出了深20mm的型腔;用紫铜电极加工淬火钢,加工电流为50A时,生产率是430mm~3/min:用铸铁电极加工淬火钢,电流为50A时粗加工生产率是520mm~3/min;光洁度为▽_6下时的精加工生产率为10～16mm~3/min。主轴速度无级可调,在0～2000mm/min的范围内变化,并可在任意位置停住。用电液伺服阀控制的主轴头,不但性能优良,而且结构简
I plant trial D30 ~ 1 EDM machine tools, spindle head electro-hydraulic servo valve control. After nearly a year of practice has proved that: Electrohydraulic servo valve than the traditional nozzle baffle control sensitivity, large magnification, the use of pressure range, the spindle speed range, good stability, long life. With electro-hydraulic servo valve as a control element, for all cases of processing have been satisfied with the results. For example: with φ0.03mm of the tungsten hole punched; with a broken area of 365 × 285mm ~ 2 cast iron electrode on the hardened steel play a deep 20mm cavity; with a copper electrode machining hardened steel, the processing current of 50A , The productivity is 430mm ~ 3 / min: It is 520mm ~ 3 / min when the electric current is 50A and the finish machining productivity is 10 ~ 16mm ~ 3 / min when the finish is ▽ _6. Spindle speed stepless adjustable in the range of 0 ~ 2000mm / min, and can be stopped at any position. With electro-hydraulic servo valve control of the spindle head, not only excellent performance, but also the structure is simple