GH4169异径三通成形工艺研究
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摘要
针对特种管路设计的GH4169异径三通,模拟研究了液压胀形过程的金属流动规律,研究了加载路径、摩擦系数、管坯的尺寸等工艺因素对成形质量的影响,采用优化的工艺参数,解决了成形过程中管件开裂和失稳起皱等问题.结果表明:异径三通管成形过程中壁厚最小的区域分别是:支管顶端、底部圆弧顶端处、主管侧壁中心处;壁厚最大的区域分别在主管左右两端、支管拐角处、圆弧过渡处.成形过程摩擦系数越小,对异径三通管成形越有利;内压相对较大时,对异径三通管成形有利;变压加载时,对管件成形最有利.
Aiming at the special pipeline design of GH4169 tee with different diameters, the metal flow law in the process of hydraulic bulging was simulated and studied. The effects of process factors such as loading path, friction coefficient and the size of tube blank on the forming quality were studied. The problems of cracking and wrinkling of the tube during the forming process were solved by optimizing process parameters. The results show that the areas with the smallest wall thickness are the top of branch pipe, the top of bottom arc, the center of main side wall, and the areas with the largest wall thickness are the left and right ends of main pipe, the corner of branch pipe and the transition of arc. The smaller the friction coefficient in the forming process is, the more advantageous it is to the forming of different diameter tee tube; the larger the internal pressure is, the more advantageous it is to the forming of different diameter tee tube; and the variable pressure loading is the most advantageous to the forming of tube parts.
Aiming at the special pipeline design of GH4169 tee with different diameters, the metal flow law in the process of hydraulic bulging was simulated and studied. The effects of process factors such as loading path, friction coefficient and the size of tube blank on the forming quality were studied. The problems of cracking and wrinkling of the tube during the forming process were solved by optimizing process parameters. The results show that the areas with the smallest wall thickness are the top of branch pipe, the top of bottom arc, the center of main side wall, and the areas with the largest wall thickness are the left and right ends of main pipe, the corner of branch pipe and the transition of arc. The smaller the friction coefficient in the forming process is, the more advantageous it is to the forming of different diameter tee tube; the larger the internal pressure is, the more advantageous it is to the forming of different diameter tee tube; and the variable pressure loading is the most advantageous to the forming of tube parts.
引文
[1] 魏国玲,廉爱东,曹可,等.T型管的液压成形研究及模拟分析[J].材料科学与工程学报,2018,36(2):291-295.
[2] YANG H,LI H,ZHANG Z,et al.Advances and trends on tube bending forming technologies[J].Chinese Journal of Aeronautics,2012,25(1):1-12.
[3] AHMETOGLU M,ALTAN T.Tube hydroforming:state of the art and future trends[J].Journal of Materials Processing Technology,2000,98(1):25-33.
[4] 郎利辉,苑世剑,王仲仁,等.管件内高压成形及其在汽车工业中的应用现状[J].中国机械工程,2004,15(3):268-272.
[5] 张立伍,陶杰,郭训忠,等.Ti/Al双金属三通管件冷成形及热处理工艺[J].金属热处理,2010,35(8):65-69.
[6] 李宁,叶建林,张成,等.工业纯锆三通液压胀形优化新工艺[J].钛工业进展,2014,31(5):41-44.
[7] KOC M,AITAN T.An overall review of the tube hydroforming (THF) technology[J].Journal of Materials ProcessingTechnology,2001,108:384-393.
[8] ZHANG S H.Developments in hydroforming[J].Journal of Materials Processing Technology,1999,91:236-244.
[9] 苑世剑.内高压成形技术现状与发展趋势[J].金属成形工艺,2003,21(3):1-3.
[2] YANG H,LI H,ZHANG Z,et al.Advances and trends on tube bending forming technologies[J].Chinese Journal of Aeronautics,2012,25(1):1-12.
[3] AHMETOGLU M,ALTAN T.Tube hydroforming:state of the art and future trends[J].Journal of Materials Processing Technology,2000,98(1):25-33.
[4] 郎利辉,苑世剑,王仲仁,等.管件内高压成形及其在汽车工业中的应用现状[J].中国机械工程,2004,15(3):268-272.
[5] 张立伍,陶杰,郭训忠,等.Ti/Al双金属三通管件冷成形及热处理工艺[J].金属热处理,2010,35(8):65-69.
[6] 李宁,叶建林,张成,等.工业纯锆三通液压胀形优化新工艺[J].钛工业进展,2014,31(5):41-44.
[7] KOC M,AITAN T.An overall review of the tube hydroforming (THF) technology[J].Journal of Materials ProcessingTechnology,2001,108:384-393.
[8] ZHANG S H.Developments in hydroforming[J].Journal of Materials Processing Technology,1999,91:236-244.
[9] 苑世剑.内高压成形技术现状与发展趋势[J].金属成形工艺,2003,21(3):1-3.
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