全锻造过程的锻压变形力实时建模

Real-time modeling method of deformation force in whole forging process

制造高性能复杂整体模锻件需要的大型模锻装备必须具备精确稳定运行的能力,但强非线性和时变的锻件变形力严重影响了装备的控制能力与运行精度,其实时精确建模与预测已成为装备精确运行的关键,为此,提出开式全锻造过程的锻件实时建模方法。该方法首先利用主应力法和等效变形区原理建立了各锻造阶段的子模型,在此基础上重点考虑各锻造阶段的相互耦合关系,形成全锻造过程的实时连续动态负载模型,实现全锻造过程的锻压变形力的动态连续描述,克服现有开式模锻建模方法在各锻造阶段不连续的缺点。通过仿真验证了该建模方法的有效性与正确性,为大型模锻装备的精确稳定运行控制提供了依据。

In the process of manufacturing the sophisticated and integral forgings with high performance, the accurate and stable operation of large die forging equipment is needed, but the strong nonlinearity and variable deformation force have serious effect on the ability of control and the running accuracy of the equipment. So the real-time and accurate modeling and prediction of deformation force has become the key of accurate operation of the equipment. Therefore, a real-time modeling method of deformation force in the whole open die forging process was put forward. Firstly, the sub-model of each forging stage was established through using the main stress method and equivalent deformation zone principle. Then, by attaching emphasis on the relationship of mutual coupling among every forging stages, a real-time continuous dynamic load model in the whole forging process was formed, which implemented the dynamic and continuity description of deforming force and overcame the discontinuous shortcomings of existing open die forging modeling method in each forging stage. Finally, the availability and accuracy of modeling method was tested by simulation, which provided the reference for accurate and stable operation of large forging equipment.