变薄拉延是制造厚底、薄壁、高筒形零件的一种特种拉延加工方法。变薄拉延零件具有强度高、精度高、光洁度高(?9以上)等优点,国外已广泛用于国防生产(如弹壳)和日用品生产(如饮料杯)等。例如,英国某公司每年用变薄拉延的方法生产6600万个饮料杯。 Thinning is the manufacture of thin-walled, thin-walled, high-cylindrical parts of a special drawing processing methods. Thinning drawing parts with high strength, high precision, high finish (≥ 9) and other advantages of foreign countries have been widely used in national defense production (such as shell) and the production of daily necessities (such as the beverage cup). For example, a British company produces 66 million drink cups a year by thinning and drawing.