Transactions of Materials and Heat Treatment

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ClassificationCode：TM154

year,vol(issue):pagenumber：2024,49(2):107-118

Abstract：

For the problem of poor axial uniformity caused by the end effect during the electromagnetic bulging process of tube fittings,a tube electromagnetic bulging method based on three-magnetic field converter was proposed,and the electromagnetic-structure coupling simulation model for tube electromagnetic bulging was built by software COMSOL.Then,the distribution of radial electromagnetic force on tube fittings was studied,and the influences of structural parameters of three-magnetic field converter on the axial uniformity of tube fittings were further analyzed.The research shows that compared with the existing technology,the tube electromagnetic bulging technology based on three-magnetic field converters can generate concavely-distributed electromagnetic force to increase the axial uniformity of tube fittings.For the specific tube to be processed, there are the most suitable structural parameters of three-magnetic field converter.

In this calculation example,the tube bulging uniformity is the best when the spacing of magnetic field converter,the outer wall height of middle magnet diffuser and the outer wall height of end magnet collector are 19.0,19.6 and 6.0 mm, respectively. Compared with the traditional coil tube bulging method without magnetic field converter,the uniformity is improved by 3.2 times,by 3.04 times compared with the tube bulging method with double magnetic collectors, and by 2.36 times compared with the tube bulging method based on magnetic diffuser.

Funds：

基金项目:国家自然科学基金资助项目（51877122，51507092）

作者简介：邱立（1984-），男，博士，副教授

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