大型薄壁TC4异形环件轧制成形缺陷分析与优化  

Analysis on and Optimization of Defects during Rolling and Forming of Large Thin-walled TC4 Special-shaped Rings

作　　者：叶黑 官胜利 魏科 袁士翀 罗鸿飞 YE Hei;GUAN Shengli;WEI Ke;YUAN Shichong;LUO Hongfei

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]四川德兰航宇科技发展有限责任公司,四川德阳618000

出　　处：《大型铸锻件》2024年第6期74-78,共5页Heavy Casting and Forging

基　　金：国家自然科学基金项目(52465047);江西省自然科学基金项目(2023BAB204050)。

摘　　要：探明大型薄壁TC4异形环件环轧过程的材料流动规律及缺陷形成原因,是实现其成形一体化的关键基础。采用模拟与正交试验相结合的方法,研究不同尺寸的坯料、主辊转速及芯辊进给速度对型腔填充的影响。结果表明:以未填充即缺陷面积为优化目标时,极差结果表明内外径斜度对缺陷面积的影响最大,其次影响因素为外径槽深角与主辊转速,芯辊进给速度对缺陷面积的影响最小。经模拟得出最小缺陷面积为28 mm^(2),通过对优选工艺参数进行实际生产试验,实际异形环轧成形结果与模拟结果误差控制在10%,优选的工艺参数有效减小了缺陷面积,研究可为大型薄壁TC4异形环件成形优化提供依据。Exploring the material flow laws and the causes of defects in the ring rolling process of large thin-walled TC4 special shaped ring parts is the key foundation for realizing their formation integration.A combination of simulation and orthogonal test is used to study the effects of different sizes of blanks,main roll rotating speed and core roll feeding speed on cavity filling.The results show that when the unfilled defect area is the optimization target,the range results show that the inner and outer diameter slopes have the greatest influence on the defect area,followed by the outer diameter groove depth angle and the main roll rotating speed,and the core roll feeding speed has the least influence on the defect area.After simulation,the minimum defect area is 28 mm^(2),through the preferred process parameters for the actual production test,the actual special-shaped ring rolling and forming results and the simulation results of the error is controlled within 10%,the preferred process parameters effectively make the defect area reduced.The study can provide a basis for the optimization of the formation of large thin-walled TC4 special-shaped ring parts.

关 键 词：大型薄壁 TC4异形环件 有限元模拟 正交试验 优化 

分 类 号：TG316[金属学及工艺—金属压力加工]