1. Workpiece surface condition:
In the process of machining the material, the surface layer will be damaged due to heat, internal stress or other factors, and improper cutting parameters will affect the polishing effect. The surface after EDM is more difficult to grind than the surface after machining or heat treatment. Therefore, it should be finished with EDM before the end of EDM, otherwise the surface will form a hardened thin layer. If the EDM fine-tuning rules are not selected properly, the depth of the heat-affected layer can reach up to 0.4mm. The hardness of the hardened thin layer is higher than that of the substrate and must be removed. Therefore, it is best to add a rough grinding process to provide a good foundation for polishing process.
2, the quality of steel:
High-quality steel is a prerequisite for obtaining good polishing quality. Various impurities and pores in the steel will affect the polishing effect. To achieve a good polishing effect, the workpiece must be marked with the polished surface roughness at the beginning of machining. When a workpiece is determined to require mirror polishing, it must be a steel with good polishing properties and have been heat-treated, otherwise it will not meet the expectations. Effect.
3. Polishing technology:
Since polishing is mainly done manually, human skills are still the main reason for polishing quality. It is generally believed that the polishing technology affects the surface roughness. A good polishing technology must cooperate with high-quality steel and the correct heat treatment process to obtain a satisfactory polishing effect; on the contrary, if the polishing technology is not good, no mirror can be achieved even if the steel is good. The effect of
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