补料比及反冲推头倾角对Y型管内高压成形质量的影响研究  

Influence of Feeding Ratio and Recoil Push Head Inclination Angle on Quality of Internal High Pressure Forming in Y-shaped Tubes

作　　者：袁姣 郭全庆 王忠健 贺锐睿 徐雪峰[2] 谢君 YUAN Jiao;GUO Quanqing;WANG Zhongjian;HE Ruirui;XU Xuefeng;XIE Jun(AVIC Xi'an Aircraft Industry Group Company Ltd.,Xi'an 710089,China;a.School of Aviation Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China;National Demonstration Center for Experimental Engineering Training Education,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]中航西安飞机工业集团股份有限公司,西安710089 [2]南昌航空大学航空制造工程学院,南昌330063 [3]南昌航空大学工程训练中心,南昌330063

出　　处：《精密成形工程》2024年第5期149-155,共7页Journal of Netshape Forming Engineering

摘　　要：目的解决5A02铝合金Y型管在内高压成形过程中易出现破裂和内凹缺陷的问题,以获得最佳成形质量的管件,对成形中的补料比和反冲推头倾角进行研究。方法使用内高压成形机进行实验,分析了管件的表面质量、管件壁厚分布情况,研究了补料比和反冲推头倾角对Y型管成形质量的影响。选取端面倾角大小分别为0°、13.5°、27°的反冲推头进行实验,设计了1.5∶1、2∶1、2.5∶1和3∶14组补料比进行对比分析。结果比较3种不同反冲推头成形得到的管件,通过对支管成形效果的分析,确定13.5°为最佳反冲推头倾角;补料比在1.5~2.5时可成形出Y型管,补料比为2∶1时,Y型管成形质量最好。为获得成形质量高的Y型管,需选择补料比为2∶1的加载路径和端面倾角为13.5°的反冲推头进行实验。结论采用合适的反冲推头端面倾角,既可以使Y型管获得理想高度的支管,又可有效地抑制成形中期支管出现的破裂缺陷;选择合理的补料比可以避免过渡圆角内凹缺陷,也可以改善Y型管的壁厚分布情况,进一步提升管件最终的成形质量。The work aims to study the feeding ratio and recoil push head inclination angle during forming to solve the prob-lem that 5A02 aluminum alloy Y-shaped tubes are prone to cracks and concave defects during the internal high pressure forming process,and to obtain pipe fittings with the best forming quality.An internal high pressure forming machine was used to conduct experiments.By analyzing the surface quality of the pipe fittings and the wall thickness distribution of the pipe fittings,the ef-fects of the feed ratio and the recoil push head inclination angle on the forming quality of the Y-shaped tube were studied.Recoiling pushers with end face inclination angles of 0°,13.5°,and 27°were selected for the test,and four groups of feeding ratios of 1.5∶1,2∶1,2.5∶1,and 3∶1 were designed for comparative analysis.Through comparing the pipe fittings formed by three different recoil push heads,and analyzing the branch tube forming effect,it was determined that 13.5°was the optimal re-coil push head inclination angle;Y-shaped tubes can be formed by using a feed ratio between 1.5 and 2.5.When the material ra-tio was 2∶1,the Y-shaped tube had the best forming quality.In order to obtain a Y-shaped tube with high forming quality,it was necessary to select a loading path with a feeding ratio of 2∶1 and a recoil push head with an end face inclination angle of 13.5°for experiments.The appropriate end face inclination angle of the recoil push head can not only obtain the branch tube of the ideal height for the Y-shaped tube,but also effectively suppress the rupture defects of the branch tube in the middle stage of forming;choosing a reasonable feeding ratio can avoid the concave defects of the transition fillet and also can improve the wall thickness distribution of Y-shaped tubes and further improve the final forming quality of pipe fittings.

关 键 词：内高压成形 Y型管 5A02铝合金 补料比 反冲推头倾角 

分 类 号：TG306[金属学及工艺—金属压力加工]