美国 Ohio 州立大学的研究人员开发了比一般板料成形方法速度快5倍的成形汽车铝制零件的拉深技术。这种成形技术虽然在50～60年代就已提出,但没有为人们所重视,所以一直没有加以开发和利用。这种技术的原理是利用急速变动的电能,使模具在几秒钟之内即对铝板产生充分 Researchers at Ohio State University in the United States have developed deep drawing of aluminum parts for shaped automotive parts five times faster than normal sheet metal forming methods. Although this kind of forming technology was put forward in the 1950s and 1960s, it has not been taken seriously and has not been developed and utilized. The principle of this technology is the use of rapidly changing electrical energy, so that the mold in a few seconds that aluminum sufficient