A combined method of selective laser sintering (SLS) and cold isostatic pressing (CIP) was applied to manufacturing metal parts rapidly. Finite element method was used to predict final dimensions and decrease cost. The simulations of CIP of selective laser sintered parts were carried out by Drucker-Prager-Cap constitutive model with ABAQUS computer program. The property of metal powder was measured by CIP experiments. The results show the rubber bag and the friction coefficient have little influence on results of simulations. The parts only have uniform shrinkage and have no obvious distortion in shape. The results of simulations show a good agreement with the experimental results and the calculated results, indicating that the Drucker-Prager-Cap model is an effective model to simulate CIP process. The simulations could give a useful direction to forming process of the CIP of selective laser sintered components.%应用结合的选择性激光烧结和冷等静压技术快速制造金属零件.使用有限元方法预测零件的最终尺寸并降低成本;使用Drucker-Prager-Cap模型在ABAQUS软件中实现对选择性激光烧结零件的冷等静压过程的模拟.金属粉末的性质通过冷等静压实验测量.结果表明:橡胶包套和摩擦因数对零件的形状和尺寸影响很小;零件只有均匀收缩,没有明显的形状扭曲.实验与模拟结果符合得较好,这表明Drucker-Prager-Cap模型是模拟冷等静压过程的有效模型;通过模拟可以为选择性激光烧结零件的冷等静压成形过程提供有益的指导.
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