冲压厚壁封头时壁厚会过分减薄,这就限制了变形工艺的范围,降低了封头强度。所以,在重要封头零件的技术条件中对变薄作了严格规定。 通常用增加原始毛坯的壁厚来补偿壁的减薄,这会造成材料浪费从而增加产品制造成本。 为了减少壁的减薄采用了不均匀温度场:毛坯中心部分的温度低于毛坯周边部分 Thick wall thickness stamping will be excessively thin wall, which limits the scope of the deformation process, reducing the head strength. Therefore, the important head of the technical conditions of the thin parts made strict rules. Wall thicknesses are often compensated for by increasing the wall thickness of the original stock, which can result in material waste and increased product manufacturing costs. Uneven temperature fields are used to reduce wall thinning: the temperature at the center of the blank is lower than that at the periphery of the blank