矩形截面锻件的径向锻造力与展宽

首先针对矩形截面锻件径向锻造工艺进行了试验研究,并采用有限元法进行了三维数值模拟,不同压下率条件下模拟与试验所得的锻造力误差不超过5%,表明有限元模型是合理的。采用有限元模拟方法,分析了压下率和送进率等参数对径向锻造力与坯料展宽的影响规律。采用回归正交试验方法,将无量纲化的工艺参数对径向锻造力与坯料展宽的影响规律拟合为二次多项式,拟合结果与有限元模拟结果的误差不超过6%,表明拟合公式是合理的。这些拟合公式可用于矩形截面锻件径向锻造工艺的设计和优化。

Radial forging force and spread for rectangular cross-sectional forging

Radial forging experiments of rectangular cross-sectional forging were implemented, and three-dimensional simulation of radial forging process was carried out by finite element (FE) method.However, the deviation between the predicted and measured forging forces under different compression ratio is less than 5%, which shows the reasonableness of the FE model.Then, the influences of radial forging parameters, such as compression ratio and feed ratio, on forging forces and lateral spread were analyzed by the FE simulation.Finally, the relationships of the non-dimensionalized radial forging parameters with forging forces and lateral spread were fitted to quadratic polynomials by the regression orthogonal test method.The deviation between the fitted and simulated results is less than 6%, which shows the rationality of the fitted quadratic polynomials.The fitted quadratic polynomials were used to research on design and optimization of the radial forging process further.