飞边槽结构对汽车曲轴模锻成形的影响

Influence of flash groove structure on die forging of vehicle crankshaft

为研究飞边槽结构对曲轴模锻成形的影响,采用数值模拟和试验验证的方法,来确定合适的飞边槽结构。首先,对3种典型的飞边槽结构（常规飞边槽、阻力沟飞边槽、阻力墙飞边槽）及其模锻时的金属流动特性进行分析。其次,构建相应分析模型,在Deform中全面分析3种不同飞边槽结构对模具型腔的充填、锻件应力、应变分布及最大成形载荷的影响。最后,以试验的方式对分析结果进行验证。结果表明,采用阻力墙结构的飞边槽,在其他结果影响较小的情况下,能有效提高金属充填模具深腔的能力,实现精准下料,节约材料成本。

In order to study the influence of flash groove structure on die forging of crankshaft,the suitable flash groove structure was determined by numerical analysis and test verification. Firstly,three typical structures of conventional flash groove structure,flash groove structure of resistance ditch and flash groove structure of resistance wall were analyzed,and the corresponding metal flow characteristics in the die forging were studied. Secondly,the corresponding analysis models were constructed,and the influences of three different types of flash groove strustures on the mold filling,stress and strain distribution of forgings and the maximum forming load were comprehensively analyzed by Deform. Finally,the analytical results were verified by experiments. The results show that by applying resistance wall of flash groore structure,the ability of mold filling is effectively improved when other results have less effects,which could realize the precise blanking and save the cost of materials.