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我们承接的外协零件(磁芯),原材料为稀土金属。形状是45×15×20mm~3的长方体,加工形状为φ3×3.5的圆柱(磁芯),采用φ0.2mm的钼丝,常规加工规准,新上的钼丝,工作2～4天,就出现断丝。工作液一星期换一次。加工中发现,工作液中有些悬浮状黑色泡沫。泡沫附着在工件、工作台、油泵上;钼丝运行一天(8小时),颜色为黑白斑状。以后其颜色加深,直至烧断(不管怎样调节控制台上的有关旋钮,上述现象总是存在)。通过实验,否定了工作液是断丝的主要原因。如将加工磁芯2～3天的工作液,用
We undertake the external components (core), the raw material for rare earth metals. Shape is 45 × 15 × 20mm ~ 3 rectangular parallelepiped, processing shape φ3 × 3.5 cylindrical (core), the use of φ0.2mm molybdenum wire, conventional processing standards, the new molybdenum wire, work 2 to 4 days, Broken wire appears. Working fluid change once a week. Found in the processing, the working fluid some floating black foam. Foam attached to the workpiece, workbench, pump; molybdenum wire running day (8 hours), the color is black and white spotted. After its color deepen, until the blown (no matter how to adjust the knob on the console, the above phenomenon always exists). Through experiments, denied that the working fluid is the main reason for broken wires. If the processing core 2 to 3 days of working fluid, with