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Computer Modeling of Wear in Extrusion and Forging of Automotive Exhaust Valves

机译:汽车排气门挤压和锻造磨损的计算机建模

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摘要

In an automotive engine valve forging process, the billet is cold sheared, induction heated, and fed to a mechanical press for a two-stage forging operation with the first stage being extrusion. The main limiting factor in this operation is the wear of the dies during the first stage, extrusion. In this study, abrasive wear was identified as the primary mode of wear, and computer simulation was used to investigate the effect of process variables, such as press speed, initial billet temperature, and die preheat temperature upon abrasive wear. The result generated by this study should be applicable to other part geometry and not limited just to exhaust valves.
机译:在汽车发动机气门的锻造过程中,将坯料冷剪,感应加热并送入机械压力机进行两阶段的锻造操作,第一阶段为挤压。此操作中的主要限制因素是模具在挤出的第一阶段的磨损。在这项研究中,磨料磨损被确定为磨损的主要方式,并且计算机模拟被用来研究工艺变量(例如压机速度,初始坯料温度和模具预热温度)对磨料磨损的影响。这项研究产生的结果应适用于其他零件几何形状,而不仅限于排气门。

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