VVT内转子的模具优化设计及压制工艺的数值模拟仿真

Optimizing design of mould and compacting process on VVT rotor using numerical simulations

VVT内转子是汽车发动机中的关键零件,作为汽车传动机构件之一,需具有较高的配合精度和力学性能要求。本文基于粉末连续体,运用有限元Deform软件对VVT内转子在不同模具设计及压制工艺方案下的压坯密度进行了模拟分析,通过模拟数据对模具进行优化和压制工艺改进,以提高压坯密度分布的均匀性,来实现VVT内转子采用粉末冶金近净成形,并满足其对精度、密度、性能的要求。

The VVT inner rotor is an essential part of the automobile engine.As one of the automobile transmission parts,it is required to own high matching accuracy and mechanical performance requirements.Based on the powder continuum,this paper used finite element deform software to simulate and analyze the compact density of the VVT inner rotor under different mold designs and pressing process schemes.The simulation data was used to optimize the mold and improve the pressing process to improve the uniformity of the density distribution of the green compact,so that the VVT inner rotor was manufactured by the advanced method of powder metallurgy net forming and meets its requirements for accuracy,density,and performance.