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本文介绍一种新开发的用于6063合金挤压型材的半球状模,模芯的端面在铸锭入口侧是半球状,存在于模芯舌根部的最大拉伸应力同分流模相比降低了许多,而正是这种应力导致龟裂。半球状模的设计和制造是基于用FEM(有限元法)进行应力分布的计算。FEM(有限元法)分析表明,这种新型模具的模芯重量和舌根部周围的最大拉应力,分别降至以往该种模的12％和26％,基于FEM(有限元法)制造的半球状模,与以往使用的模子相比,其重量降至13％,挤压力降至96％。
In this paper, a newly developed hemispherical mold for 6063 alloy extrusion is introduced. The end face of the mold core is hemispherical at the entry side of the ingot. The maximum tensile stress existing at the base of the mold core is reduced compared with that of the splitter mold Many, and it is this stress that leads to cracking. The design and manufacture of hemispherical molds is based on the calculation of the stress distribution using FEM (Finite Element Method). FEM analysis shows that the core weight of the new mold and the maximum tensile stress around the base of the tongue are reduced to 12% and 26% respectively of the previous model, based on FEM (Finite Element Method) manufactured hemisphere Stamper, compared with the mold used in the past, the weight dropped to 13%, extrusion pressure dropped to 96%.