基于静电场的筋板状铝合金锻件预成形设计  

Design of preforming for rib-web aluminum alloy forgings based on electrostatic field

作　　者：肖红[1] 戴甲洪 周峻峰[2] 李杰[2] 

机构地区：[1]长江师范学院机械与电气工程学院,重庆408100 [2]重庆大学材料科学与工程学院,重庆400044

出　　处：《锻压技术》2018年第1期20-25,共6页Forging & Stamping Technology

摘　　要：筋板状铝合金航空锻件在成形过程中常因预制坯结构设计不合理而导致穿流.针对此问题,以某H型铝合金锻件为对象,基于相似性原理,提出一种预制坯直接设计方法——静电场法.借助ANSYS软件,首先通过静电场模拟设计7组试验预制坯;然后利用有限元软件分别对试验方案的成形过程进行数值仿真;最后通过比较各个方案的穿流倾向性、成形载荷、等效应变速率以及等效应变等指标,确定最佳预制坯方案.研究发现：采用静电场设计的预制坯成形结果均优于传统设计,电势值ζ=0.125 V的预制坯成形过程中,在满足充填性要求的同时,其穿流倾向性最小,并且成形载荷相比其他方案也最小.Due to the partial draining caused by unreasonable structure of preformed billet in the forming process of rib-web aluminum al-loy aviation forgings,taking H-shape aluminum alloy forgings as study object,a direct design method of preformed billet,namely electro-static field method,was proposed by similarity principle. Then,seven groups of preformed billet were designed by electrostatic field simu-lation,and the forming processes were simulated respectively by software ANSYS. Furthermore,the most proper preformed billet scheme was achieved by comparing partial draining tendentiousness, forming load, equivalent strain rate and equivalent strain of every scheme. The results show that the preformed billet designed by the electrostatic field method is better than that designed by the traditional method. The preformed billet with the electric potential value of 0.125 V in the forming process is of the smallest partial draining tendentiousness and meets the filling requirements at the same time with the smallest forming load comparing to the other schemes.

关 键 词：筋板状铝合金锻件 穿流 预成形设计 静电场模拟 成形载荷 

分 类 号：TG316[金属学及工艺—金属压力加工]