A STUDY ON P/M DIES POLISHED BY ELECTROCHEMICAL METHOD

The technological parameters and the composition and proportion of electrolyte for polishing irregular shape dies by electrochemical method have been studied. The coarseness of die made of bearing steel, can be reduced from Ra 2.4~1.6 to Ra 0.8~0.4, by polishing. The size tolerance of above die can be controlled within 0.015mm. Practical examples for polishing P/M gear dies which meet the technical demand of 8 grade precision have been given. Therefore, the electrochemical method used to polish P/M dies, especially irregular shape dies is an effective process with high efficiency, low cost and guaranteed quality.