1.the surface condition of workpiece.
In the process of machining, surface of materials will be damaged by heat, internal stress, or other factors. Improper cutting parameters will affect the polishing effect. The surface after EDM is much more difficult to grind than the surface after machining and heat treatment. So, before the end of EDM, it should adopt the electrospark fine trimming . Otherwise, it will form the hardening thin layer on the surface.
If the criteria of electrospark fine trimming is selected improperly, the depth of the heat affected layers can up to 0.4 mm. The hardening thin layer is harder than the matrix hardness. It must be removed. So it's best to add the coarse grinding, which provide a good foundation for polishing process.
2.The quality of the steel
High quality steel products is the premise of good polishing quality. All kinds of inclusions and porosity in steel will affect the polishing effect. To achieve good polishing effect, the workpiece must indicate the polishing surface roughness at the beginning of the machining.
3.The technology for heating processing
If the heat treatment is improper, there will be differences on the steel surface hardness and property, which can cause difficulties for polishing.
4.The polishing technology
Because the polishing is mainly completed by manual work, people’s skills are still the main influencing factors of mold components surface polishing.
From the above can get to know, there are four factors influencing the mold components surface polishing. If you want to know more about mold parts polishing, you can come to our official website to find.
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