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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >DIE LIFE PREDICTION IN RAPID PROTOTYPE DIES
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DIE LIFE PREDICTION IN RAPID PROTOTYPE DIES

机译：快速原型模具的模具寿命预测

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摘要

To meet the growing demand for rapid, low-cost die fabrication technology in the sheet metal forming industry, easy-to-machine, polyurethane-based, composite board stock is used widely as a rapid tooling material. In practice, it is desirable to terminate die life by wear rather than by catastrophic fatigue. However, the failure mechanisms of the rapid prototyped tools are not clearly understood, thus making the prediction of tool life difficult. This paper presents a method to estimate the fatigue life of a sheet metal forming die fabricated from ATH (aluminum trihydrate)-filled polyurethane. A finite element model of 90° V-die bending process was developed, and the effects of process parameters on stress distribution in the punch and die were investigated through simulation. Mechanical testing was performed to characterize the fatigue properties of the tooling material. The computer-simulated results were verified through experiments using instrumented, laboratory-scale punch and die sets.
机译：为了满足钣金成型行业对快速，低成本模具制造技术不断增长的需求，易加工的聚氨酯基复合板材料被广泛用作快速加工材料。实际上，希望通过磨损而不是通过灾难性疲劳来终止模具寿命。但是，快速原型工具的失效机理尚不清楚，因此很难预测工具寿命。本文提出了一种评估由ATH（三水合铝）填充的聚氨酯制成的钣金成型模具的疲劳寿命的方法。建立了90°V型模具弯曲过程的有限元模型，并通过仿真研究了工艺参数对冲头和模具应力分布的影响。进行了机械测试以表征工具材料的疲劳性能。通过使用仪器化的实验室规模的冲头和模具，通过实验验证了计算机模拟结果。

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