针对某带肋板齿轮坯在原闭式热精锻成形工艺方案下充填不饱满的问题,借助Deform-3D软件模拟锻造成形过程中的金属流动情况,得出成形锻件在原工艺方案下不能充满的原因,在此基础上进行了工艺改进,并进行了试验验证.结果表明:原工艺因变形量过大,打击能量消耗过快,导致成形后期打击力不足,金属不能充满模具型腔;提出了增加预锻工序的改进闭式热精锻成形工艺,数值模拟结果显示改进工艺下的锻件充填饱满,未见锻造缺陷;试验结果与数值模拟结果吻合度较高.
In order to solve the not enough filling problem of the gear blank with ribbed plate under the original closed hot precision forging process scheme, the metal flow was simulated with the help of Deform-3D software, and the reason of not enough filling were found in the original process.On this basis, the process was improved and verified by experiment.Results show that the deformation of original process is too large, the hitting energy consumption is too fast and the hitting power is insufficient in final forming stage, these lead to the dissatisfaction of the mold filling.A modified closed hot precision forging process with pre-forging operation is proposed.The numerical simulation results of the modified process show that the filling of the forge piece is full and no defects are found.Experimental results are in accordance with the simulated ones.
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