s and electric welder cores with the punch/cutting burrs smaller than 0.02mm and the size precision controlled between plus and minus 0.05mm. Iron core products enjoy good conformity without chip level problems. It is especially the case with the silicon steel processing, where the device can rapidly cut the orientated silicon steel with small stress, little abrasion to the cutting blade and long sharpening intervals for the mold. It can promote the processing efficiency and precision, raise the