Forming characteristics of tube free-bending with small bending radii based on a new spherical connection

doi:10.1016/j.ijmachtools.2018.05.005

CORC > 金属研究所 > 中国科学院金属研究所

	Forming characteristics of tube free-bending with small bending radii based on a new spherical connection
	Guo, XZ ; Xiong, H ; Li, H 1; Xu, Y 5; Ma, ZQ ; Abd El-Aty, A ; Ma, YN ; Jin, K 4
刊名	INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
	2018-10-01
卷号	133 页码:72-84
关键词	Free-bending Spherical connection Small bending radii Forming characteristics Finite element simulation Bending test
ISSN号	0890-6955
DOI	10.1016/j.ijmachtools.2018.05.005
英文摘要	In tube free-bending, the connection of the bending die to the guide has a great influence on the stability of mechanical movement and the forming limit of the bent tube. The general connection of the bending die to the guide cannot realize the continuous stable movement of the bending die. Spherical connection of the bending die to the guide can guarantee a continuous changed tipping of the bending die, but has a limited minimal bending ratio (ratio of bending radius to tube outer diameter) of R/D-0 = 3 depending on the geometrical constrains. In this paper, a new spherical connection of the bending die to the guide was designed through geometric derivation, which can lead to a greater deflection of the bending die, to realize the bending ratio of down to R/D-0 = 2.5. Based on the designed spherical connection, the bending ratio of down to R/D-0 = 2.43 and R/D-0 = 2.78 of brass tube were realized in the finite element simulation and bending test respectively. And with the analytical model, simulation model and experimental bending results, the forming characteristics of bent tube with small bending radii based on the spherical connection structure were investigated. The main results show that the equivalent stress, displacement of the strain neutral layer (NL) increase with the decrease of bending radius, and the wall thickness thinning in outer bend shows little differences under tight and big bending radii due to the increased axial thrust.
学科主题	Engineering, Manufacturing ; Engineering, Mechanical
语种	英语
WOS记录号	WOS:000442735800007
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79937]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211100, Jiangsu, Peoples R China 2.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 4.Shanghai Acad Spaceflight Technol, Shanghai 201109, Peoples R China 5.Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China 6.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogenious Mat Ctr, Nanjing 210094, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Guo, XZ,Xiong, H,Li, H,et al. Forming characteristics of tube free-bending with small bending radii based on a new spherical connection[J]. INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE,2018,133:72-84.
APA	Guo, XZ.,Xiong, H.,Li, H.,Xu, Y.,Ma, ZQ.,...&Jin, K.(2018).Forming characteristics of tube free-bending with small bending radii based on a new spherical connection.INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE,133,72-84.
MLA	Guo, XZ,et al."Forming characteristics of tube free-bending with small bending radii based on a new spherical connection".INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE 133(2018):72-84.