There are two main purposes for polishing precision stamping dies. One is to increase the brightness and precision of precision molds. The second is to make the mold easy to demould.
In the polishing process, the coarse oil stone is generally used first, and the surface of the machined mold cavity is roughly polished, and the tool marks of the machine and the tool are polished. Then use a fine oil stone to polish the polishing marks of the rough stone. Then use a fine sandpaper to polish the polished surface of the fine stone. Finally, using a polishing paste or a polishing paste, the final surface of the cavity of the mold is polished and polished to achieve a bright, mirror-like effect.
Precision stamping die mechanical polishing is a polishing method that removes the polished convex portion and obtains a smooth surface by cutting, plastic deformation of the material surface, and the like. Generally, oil stone strips, wool wheels, sandpaper, etc. are used, which are mainly operated by hand. For special parts such as the surface of the rotary body, auxiliary tools such as a turntable can be used, and the method of super-fine polishing can be used for high surface quality requirements.
Ultra-fine grinding and polishing is a special-purpose grinding tool. In the polishing liquid containing abrasive, it is pressed against the machined surface to perform high-speed rotary motion. With this technology, the surface roughness of Ra0.008μm can be achieved, which is the most efficient among various polishing methods. This method is often used in optical lens molds.