The main purpose of the precision stamping mold is mainly two, one is to increase the brightness of the precision mold, beautiful. The second is to make the mold easy to demold. When polishing is performed, the thick oil is used to coarse grinding on the surface of the machining mold cavity, grinding the knife of the tool, and then uses fine oil to grind the crude oil to reach traces, then use fine The surface of the sandpaper is grinded on the surface of the fine oil, and finally uses a polishing paste or abrasive cream to perform the final fine polishing surface of the cavity surface, and finally achieve the brightness of the mirror.
1, mechanical polishing
Precision stamping mold mechanical polishing is cutting, and the surface plastic precision stamping deformation of the material removes the polished convex portion. The polishing method of smooth surface, generally used torrot, wool, sandpaper, etc. . Superfluentially throwing a special abrasive tool, in a polishing liquid containing abrasive, pressing on the surface of the workpiece, performs high speed rotation. With this technique, the surface roughness of Ra0.008 μm can be used, which is the highest in various polishing methods. This method is often used in optical lens molds.
2, electrolytic polishing
Precision stamped mold electrolysis polishing, i.e., the surface of the selective dissolved material surface is smooth, so that the surface is smooth. Compared with chemical polishing, the impact of the cathode reaction can be eliminated, and the effect is better. The electrochemical polishing process is divided into two steps:
(1) macro and flat, dissolved product diffuses into the electrolyte, and the surface geometric rough decreases Ra \u0026 gt; 1 μm.
(2) Micro-light is flat, the anode is polarized, and the surface light brightness is improved Ra \u0026 lt; 1 μm.
3, ultrasonic polishing
Precision stamped die workpiece is placed in an abrasive suspension and placed together in an ultrasonic field, relies on the oscillation of ultrasonic waves, so that the abrasive is in the workpiece Surface grinding polishing. Ultrasonic machining macroscopic is small, and does not cause deformation of the workpiece, but the tooling production and installation are more difficult. Ultrasonic machining can be combined with chemical or electrochemical methods. On the basis of corrosion and electrolysis, an ultrasonic vibration stirred solution is applied, and the surface dissolution product is removed from the surface of the workpiece, the corrosion or electrolyte of the surface is uniform; the airborne effect in the liquid can inhibit the corrosion process, which is conducive to surface light.