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以发动机气门的摆动辗压终锻成形工艺为研究对象,运用Deform-3D软件对坯料成形过程进行数值模拟,并在摆动辗压机上进行具体实验。通过对实验试样的表面质量进行分析,结合数值模拟得到工件各变形阶段的应力场分布、应变速率场分布和速度场分布情况,初步探讨了气门摆动辗压的变形机理。分析结果表明:将摆动辗压工艺应用于气门的终锻中不仅是可行的,且相对于模锻工艺而言,摆动辗压成形的气门有锻造流线紧密流畅、摆辗件盘外圆无飞边、表面氧化皮少、气门盘部不易出现开裂等优点。
Taking the swinging and rolling final forging forming process of the engine valve as the research object, Deform-3D software was used to simulate the billet forming process and the concrete experiment was carried out on the swinging rolling machine. By analyzing the surface quality of experimental specimens and combining with numerical simulation, the stress field distribution, strain rate field distribution and velocity field distribution in each stage of deformation are obtained. The deformation mechanism of valve swinging and rolling is preliminarily discussed. The analysis results show that it is not only feasible to apply the swinging rolling process to the final forging of the valve, but also the forging flow line of the swinging forming valve is smooth and smooth compared with the forging process. Flash, less surface oxide, valve tray is not prone to cracking and so on.