拉瓦尔喷管的电铸层有一定的均匀性要求.在电铸过程中,电铸阳极的轮廓和位置决定了阴极表面电流密度的分布,并最终影响电铸层的均匀性.为此,设计了一种新的阳极轮廓优化方法,在进行阳极轮廓优化设计时,只需在编制的优化程序中输入阴极轮廓,通过ANSYS软件进行电场分析,程序根据阴极上不同位置电场强度的强弱,自动逐步调整对应点的阳极轮廓,以改善阴极表面的电流密度分布均匀性,即可得到优化后的阳极轮廓.采用该优化方法,可以快速得到所需的阳极轮廓,且通用性强.对某型喷管外壁进行阳极轮廓优化设计后,制得了厚度最大处与最小处比值为1.26的电铸镍层.
关键词：
电铸; 喷管; 阳极; 优化设计; 电场
The deposit of laval nozzle has certain thickness uniformity requirements. During the electroforming, the current density distribution on the cathode surface is decided by the anode profile and its position, which will influence the uniformity of the deposit finally. A new optimization method of the anode profile is designed. During the process of optimization, enter the cathode profile in the optimization program and analyze the electric field by ANSYS. Then according to the real-time current density on the cathode surface, the anode profile is changed progressively by the program to improve the uniformity of the current density distribution. Finally, we can obtain the optimized anode profile. The suitable anode profile can be obtained quickly by this optimization method, which also has strong generality. The anode profile of the nozzle is optimized by the proposed method, and the nickel deposit is obtained, which is 1.26 of the ratio of the maximum thickness to the minimum thickness.
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