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弹性凸模胀形亦称软阳模胀形,是用橡皮(聚氨酯橡胶、PVC塑料等高弹性物质)作凸模,以金属作刚性凹模。胀形装置如图1所示。其胀形过程是:橡皮或其它高弹性物质所制成的凸模受轴向载荷的作用,凸模轴向压缩而径向胀大,迫使毛坯随同产生变形,最后在弹性凸模产生的高压(一般为200～400公斤力/厘米~2,用聚氨酯橡胶可达1500～1800公斤力/厘米~2)作用下使毛坯紧贴凹模内壁而成为各种曲面型零
Elastic convex bulge also known as soft male bulging bulge, is rubber (polyurethane rubber, PVC plastic and other highly elastic material) as a punch to metal as a rigid die. Bulging device shown in Figure 1. The bulging process is: rubber or other highly elastic material made of punch by the role of axial load, the axial compression of the male die and radial expansion, with the resulting forced deformation of the blank, and finally in the high pressure generated by the elastic punch (Generally 200 ~ 400 kg / cm ~ 2, with polyurethane rubber up to 1500 ~ 1800 kg / cm ~ 2) under the action of the blank close to the die wall and become a variety of surface zero