所谓对向液压成形法,系在充满液体的液压室内,利用刚体的冲头(凸模)对板料加压而形成的对向液压的成形方法。 利用对向压力的成形方法进入实用阶段,可以说是在1951年由美国发明了液压成形压力机开始。这种压力机,虽有刚性凹模还具有半球形液压室,橡皮膜介于其间,将液压作用于板料,在日本也在1955年开展了 The counter-hydroforming method is a method of forming a counter-hydraulic pressure by pressurizing a sheet material with a rigid punch (punch) in a liquid-filled hydraulic chamber. The use of counter-pressure forming method into the practical stage, can be said that in 1951 by the United States invented the hydraulic forming press. This type of press, although the rigid die also has a hemispherical hydraulic chamber, with the rubber film in between, will act on the hydraulic sheet metal, also in Japan in 1955