The effect of common mould polishing process quality factor analysis

Due to mechanical polishing is still mainly rely on artificial to complete, so polishing technology is the main reason affecting the quality of polishing. In addition, also with the mold material, the surface condition, heat treatment before polishing process and so on. High quality steel is a prerequisite for good polishing quality, if there are differences between the steel on the uneven surface hardness or features, tend to produce polishing difficult. All kinds of inclusions in steel and pores are not conducive to polishing. 1 the influence of different hardness of polishing technology increased hardness increased the difficulty of grinding, but after polishing roughness decreases. Due to the higher hardness, to achieve lower roughness of the polishing time increases correspondingly. Hardness increased at the same time, the possibility of polishing excessive decrease accordingly. 2 workpiece surface condition effect on the polishing process of steel in the process of the broken of cutting machining, the surface will be damaged by heat, internal stress, or other factors, improper cutting parameters affect the polishing effect. After the edm surface is much more difficult than ordinary mechanical processing or the surface of the heat treatment after grinding, so fine gauge should be used before the end of edm edm dressing, otherwise will form the surface hardening thin layer. If improper selection edm refinement gauge the depth of the heat affected layers up to 0. 4mm。 Hardening of the thin layer of hardness is higher than matrix hardness, must be removed. So it's best to increase a coarse grinding, thoroughly remove damaged surface layer, average constitute a rough metal surface, polishing processing to provide a good foundation. Chemical polishing for polishing degree is not high, need to heat use, for now the current technology, if it is able to adopt the above three kinds of polishing, do not have to adopt the way of chemical polishing, chemical polishing effect is poor because it is over, the comprehensive cost is higher.