發(fā)布時間：2019-07-14 18:05

【摘要】：為解決鋁合金熱沖壓板件存在的減薄和回彈等缺陷,采用響應面法分析了板料初始成形溫度和壓邊力對最大減薄率和最大回彈量的影響規(guī)律。結果表明:成形件的最大減薄率隨著板料初始成形溫度和壓邊力的增大而增加;最大回彈量隨著板料初始成形溫度和壓邊力的增大而下降。最大減薄率和最大回彈量之間具有一定的沖突性。為解決這種沖突,采用多目標遺傳算法NSGA-II進行多目標優(yōu)化,得到Pareto最優(yōu)解。進而在保證最大減薄率和最大回彈量都相對較小的情況下,確定合理的鋁合金熱沖壓板件的工藝參數(shù)范圍:板料初始成形溫度為470.86~520°C;壓邊力為110~131.78k N。試驗結果表明,合理的工藝參數(shù)可以避免破裂和減少回彈。仿真結果與試驗具有較好的一致性。
[Abstract]:In order to solve the defects such as thinning and springback in hot stamping of aluminum alloy, the effects of initial forming temperature and blank holder force on the maximum thinning rate and maximum springback were analyzed by response surface method. The results show that the maximum thinning rate of the forming parts increases with the increase of the initial forming temperature and blank holder force, and the maximum springback decreases with the increase of the initial forming temperature and blank holder force. There is a certain conflict between the maximum thinning rate and the maximum springback. In order to solve this conflict, the multi-objective genetic algorithm (NSGA-II) is used for multi-objective optimization, and the optimal solution of Pareto is obtained. Furthermore, under the condition that the maximum thinning rate and the maximum springback are relatively small, the reasonable technological parameter range of aluminum alloy hot stamping sheet is determined as follows: the initial forming temperature of sheet metal is 470.86 鈮，

本文編號：2514428