Transactions of Materials and Heat Treatment

Title：Influence of processing parameters on the forming quality of high strength steel tube during single pass neckspinning

Authors： Yang Xin Xiao Gangfeng Cheng Xiuquan Xia Qinxiang

Unit： South China University of Technology Guangzhou Civil Aviation College

KeyWords： high strength steel neckspinning ABAQUS wall thickness thinning dimension precision

ClassificationCode：TG306

year,vol(issue):pagenumber：2017,42(3):84-89

Abstract：

Based on ABAQUS/Explicit, a 3D finite element model of mandreless neckspinning with double rollers for high streng steel tube was established. Then, the single pass neckspinning process was simulated, and the distribution of residual equivalent stress and equivalent plastic strain as well as the influences of processing parameters on the forming quality were studied. Furthermore, the reliability of the model was verified by experiments. The results show that the maximum residual stress zone is located at the outer surface of straight wall and open end of spun parts, and the maximum equivalent strain zone is located at the outer surface of the tapered necking and straight wall transition part as well as the straight wall and the open end. However, the excessive thinning area in the spinning process is easily occurred at stress and strain concentration area. With the increasing of reduction Δ, the maximum wall thickness thinning becomes serious and the cylindricity increases, while the cylindricity is up to the minimum at Δ=3 mm. Furthermore, with the increasing of feed rate f, the maximum thinning of wall thickness reduces and the cylindricity decreases, but the average outside diameter is larger than that of the ideal value, so the integrated forming quality is better with f=1.0 mm·r-1. Thus, with the increasing of roller fillet radius rρ, the maximum thinning of wall thickness decreases and cylindricity decreases, but the cylindricity is up to the minimum along the axis with rρ=10 mm.

Funds：

广东省公益研究与能力建设专项项目（2016A010102011）

杨鑫（1991-），男，硕士研究生夏琴香（1964-），女，博士，教授

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