Factors affecting the polishability of the mold surface
(1) Surface condition of the workpiece
During the machining process of 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, so 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 be as large as 0.4 mm. The hardness of the hardened thin layer is higher than that of the substrate and must be removed. Therefore, it is good 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 inclusions 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, the steel with good polishing performance must be selected and it must be heat treated, otherwise it will not meet the expectations. Effect.
(3) Heat treatment process
If the heat treatment is improper, the surface hardness of the steel is uneven or the characteristics are different, which will cause difficulty in polishing.
(4) Polishing technology
Since polishing is mainly done manually, human skills are still the main reason affecting polishing quality. It is generally believed that the polishing technology affects the surface roughness. In fact, 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, the mirror effect cannot be achieved even if the steel is good. .
In addition, let's talk about the employment positions in the mold industry:
For mold designer, assistant designer, draftsman positions, the salary increases with the length of work, the personal basis is different, the positioning is also different, everyone can find a job that suits them.