基于Deform的航空发动机叶片金属锻造仿真

Forging Simulation of Aeroengine Blade Metal Material Based on Deform

针对航空发动机叶片形状复杂、材料变形困难,导致锻造过程中材料利用率较低,且工件完整度不高的问题,提出基于Deform的航空发动机叶片金属材料锻造仿真。结合叶片工件制造状态与功能,构建状态模型,将锻造演化过程分为毛坯态、中间态与成形态,建立信息组织原则,有助于对不同锻造阶段数据做综合管控;研究刮板与温度对成形的影响,通过对矩形求解域分析,设计均匀性描述指标;采用线性加权法优化目标函数,选取设计变量范围;确定材料、变形温度与速度、网格分割数量等工艺参数,设置5次热交换与锤击操作,完成叶片金属材料锻造。仿真结果证明,所提方法能有效模拟出锻件变形系数变化过程,提高材料利用率,增加工件完整度。

Generally, the material flexibility of aeroengine blade is poor, and the shape of engine blade is complex, leading to low material utilization and low workpiece integrity in forging process. For this reason, this paper presents a way for the metal forging simulation of aeroengine blade based on deform. Based on the manufacturing status and function of blade parts, the state model was constructed. The forging evolution process was divided into blank state, intermediate state and forming state. The establishment of information organization principle was helpful for comprehensive control of data in different forging stages. The effects of scraper and temperature on the forming process were studied in detail. The uniformity description index was designed via the analysis of rectangular solution domain. The linear weighting method was adopted to optimize the objective function and select the range of design variables. The deformation temperature, speed and mesh division number of the material were set, and the heat exchange and hammering operations were set for 5 times, completing the forging of the blade metal material. The simulation results show that the method can effectively simulate the change process of forging deformation coefficient, improve the material utilization rate and increase the workpiece integrity.