Development of Polishing with High Efficiency on Small Mold and Die

概要

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Recently, mirror-like surface on a mold and a die was required for adding high quality on the most products. Particularly, as the processing of the mirror-like surface on the mold or the die with small and complex shape is difficult, the processing is performed a very long time by polishing of the skilled worker. Automatic polishing for the products is very difficult. Therefore the polishing with high efficiency on a small mold or die with complex shape was developed and evaluated. The three polishing tools were firstly developed for the experiment; the first polishing tool is the tool for the high speed polishing on the area in the die, the second tool is the tool using a contour line for the middle speed polishing on the line in the die and the third tool is the tool using a small ball (less than 1 mm diameter) for polishing on the point in the die with small and complex shape. The optimum tool for each size or shape in a die and its optimum polishing condition are investigated for high efficiency in several experiments. The polishing tool is installed in the spindle of the CNC milling machine. This system was evaluated for high speed polishing the mirror-like surface on the small parts with complex shape. It is concluded from the results that the three tools and its polishing process were effective for processing the mirror-like on the surface of the small parts with complex shape, and optimum polishing condition was also cleared.