航空发动机大高径比高温合金筒形件充液拉深缺陷形成规律分析

Analysis on Defect Formation of Superalloy Cylindrical Part with Large Height to Diameter Ratio in Aero Engine during Sheet Hydroforming Process

针对航空发动机大高径比高温合金筒形件无法整体成形的难题,开展了一道次充液拉深成形工艺研究。研究了GH3536高温合金板材的力学性能,基于有限元数值分析软件对筒形件充液拉深成形进行数值模拟,分析不同工艺参数对筒形件壁厚和成形缺陷的影响。根据模拟结果进行筒形件充液拉深成形实验,优化了压边力和液压加载工艺窗口,成形出合格的深筒形件,分析了该零件的缺陷形成规律。

To solve the problem that the superalloy cylinder with large height to diameter ratio can not be formed integrally,a sheet hydroforming process was developed.The mechanical properties of GH3536 superalloy sheet were tested,and the sheet hydroforming process of cylindrical parts was studied based on finite element numerical simulation.Then the influence of different process parameters on wall thickness and forming defects of cylindrical parts was analyzed.According to the simulation results,the sheet hydroforming experiments were carried out to optimize the forming window of blank holding force and pressure,and qualified deep cylindrical parts were formed without any defects.Finally,the formation law of defects was analyzed.