【摘要】 为解决空调换热器翅片在胀接过程中出现的翘曲变形过大问题,借助有限元数值模拟手段,对翅片胀接变形原因、带凹槽翅片及凹槽位置布置不同时的变形情况进行了分析;基于正交试验设计的方法,获得了翅片孔和胀球轴尺寸对翅片翘曲变形程度影响的主次关系及合理的胀接参数;通过胀接试制和换热有限元模拟,验证了基于正交试验设计的胀接参数的合理性.结果表明:相比凹槽结构及位置而言,翅片孔径和胀球轴径对翅片胀接时的翘曲变形程度影响更为显著;影响翅片翘曲变形程度的因素由大到小分别是翅片孔长轴长、胀球长轴长、翅片孔短轴长、胀球短轴长.更多还原

【Abstract】 In order to avoid the excessive warpage deformation of air-conditioner’s heat exchanger fins in the expanding-jointing process,a finite element simulation was carried out to analyze the causes of warpage deformation,the deformation of the grooved fin and the groove structures in different locations on the fin.Then,on the basis of orthogonal experimental design,the primary and secondary factors affecting the warpage degree of the fin,including the dimensions of both the fin and the bulging ball,were analyzed,and reasonable parameters for the expandingjointing process were obtained.Finally,the rationality of the parameters optimized by the orthogonal experimental design method was verified through a trial produce and a heat-transfer finite element simulation.The results show that,as compared with the structure and the location of the grooves,the dimensions of the fin and the bulging ball both affect the warpage degree of the fin more significantly,and that the factors affecting the warpage degree are ranked as follows in the decreasing order of their seriousness:the long-axis length of the fin,the long-axis length of the bulging ball,the minor-axis length of the fin and the minor-axis length of the bulging ball.更多还原