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首页> 外文期刊>Modelling and simulation in materials science and engineering >Optimizing press tool shapes by numerical simulation of compaction and sintering-application to a hard metal cutting insert [Review]
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Optimizing press tool shapes by numerical simulation of compaction and sintering-application to a hard metal cutting insert [Review]

机译：通过压制和烧结的数值模拟优化冲压工具形状，应用于硬质金属切削刀片[综述]

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摘要

Designing, manufacturing and commissioning of the tooling often determines the delivery time of a new powder-metallurgical component. To speed-up this process, computer simulations of die compaction and sintering could assist in the development stage. Today, finite element simulations of the compaction process in combination with appropriate material (or constitutive) laws for the powder allow quantitative predictions of the density distribution in the green body as well as the tool loadings. The shape after firing can be predicted by using an appropriate material law for sintering. The sinter distortions are a result of inhomogeneous density distributions in the green body. These distortions can be minimized by optimum press kinematics, and the remainder can be compensated by appropriately shaped punch surfaces. After presenting an overview about the underlying models and simulation methods for compacting and liquid phase sintering (LPS) the simulation procedure together with the optimization technique is demonstrated for a cutting insert made of hard metal powder. Finally, the shape predictions of the LPS model are compared with a simplified model. [References: 101]
机译：工具的设计，制造和调试通常确定新的粉末冶金部件的交货时间。为了加快这一过程，模具压实和烧结的计算机模拟可以在开发阶段提供帮助。如今，压实过程的有限元模拟与粉末的适当材料（或本构）定律相结合，可以对生坯中的密度分布以及工具负荷进行定量预测。可以通过使用适当的材料定律进行烧结来预测烧成后的形状。烧结变形是生坯中密度分布不​​均匀的结果。这些变形可以通过最佳的冲压运动来减小，其余的可以通过适当形状的冲头表面进行补偿。在介绍了用于压实和液相烧结（LPS）的基本模型和模拟方法的概述之后，对由硬质金属粉末制成的切削刀片的模拟过程以及优化技术进行了演示。最后，将LPS模型的形状预测与简化模型进行比较。 [参考：101]

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