Process to diversification development, gentrification in industrial products, how to improve the mold quality directly affects the quality of products is an important task. In the mold manufacturing process, shape after processing the smooth processing and surface processing called surface grinding and polishing machining parts, it is an important step to improve the mold quality. Master the polishing method reasonable, can be improved and the service life of die quality, and improve the quality of the products.

Due to mechanical polishing is mainly done by manual, so polishing technology is main reasons affecting the polishing quality. In addition, also with the mold material, polishing surface condition, the heat treatment process and so on. High quality steel is a prerequisite for good polishing quality, if the surface hardness of steel have different uneven or character, often have difficulties polishing. Various inclusions and porosity in steel are not conducive to the polishing.
Effects of 1 different hardness, the polishing process
Hardness increased to increase the grinding of difficult, but after polishing the roughness decreases. Due to the hardness of the increase, to achieve the required roughness of the polishing time corresponding lower growth. At the same time, hardness higher, the possibility of polishing over the corresponding reduction.
Effect of 2, workpiece surface condition on the polishing process
The crushing process in cutting machining of steel, the surface will be damaged due to heat, stress or other factors, the cutting parameters properly will affect the polishing effect. Electric spark machining surface after surface of common machining or grinding after heat treatment more difficult, so the electric spark machining before the end of the fine gauge electric spark dressing, or form a surface hardening layer. If the electric spark truing normalized improper selection, heat affected layer depth up to 0.4mm. The matrix hardness of hardened layer hardness high, must be removed. So it is best to add a rough grinding, thoroughly remove damaged surface layer, consisting of a piece of metal average roughness surface, provide a good foundation for polishing.