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Fatigue in cold-forging dies: tool life analysis

机译:冷锻模具疲劳:刀具寿命分析

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摘要

In the present investigation it is shown how the tool life of heavily loaded cold-forging dies can he predicted. Low-cycle fatigue and fatigue crack growth testing of the tool materials are used in combination with finite element modelling to obtain predictions of tool lives. In the models the number of forming cycles is calculated first to crack initiation and then during crack growth to fatal failure. An investigation of a critical die insert in an industrial cold-forging tool as regards the influence of notch radius, the amount and method of pre-stressing and the selected tool material is reported.
机译:在本次调查中,表明了如何预测重负荷冷锻模具的模具寿命。工具材料的低周疲劳和疲劳裂纹扩展测试与有限元建模结合使用,以预测工具寿命。在模型中,首先计算出形成裂纹的次数以开始裂纹,然后计算裂纹扩展到致命破坏的次数。报告了对工业冷锻工具中的关键模具嵌件的研究,包括缺口半径,预应力的数量和方法以及所选工具材料的影响。

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