Head of manufacturing non-standard, non-standard head price http://www.hebftc2.com/ phone 0317-8210122, simple analysis of the head of the technical points of the mobile phone 13722724665 non-standard head factory stamping factory stamping with flash diameter ), the greater the relative thickness and the blank edge stability as possible, tangential compressive stress only side of the board thickening; smaller the relative thickness of the bending resistance of the smaller vertical edge on the board, easy to lose stability and wrinkling. In addition, thermal shock the uneven plate billet heating temperature, die clearance and lower die fillet is too large, blank plan, severely bruised, BHF is too small or uneven can wrinkling and drum kits. After dough wrinkling, it is difficult through the shadow, the gap between the male mold, easily pulled off. Even overcast, the male mold, wrinkles can not be eliminated, will affect the quality of the head. High carbon steel and low carbon steel head ellipsoid can not afford to wrinkle conditions: Dp - Dm 20t prone to wrinkling and drum kits, so perfect mold, using