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

doi:10.1016/j.ijmachtools.2018.05.005

IMR OpenIR

	Forming characteristics of tube free-bending with small bending radii based on a new spherical connection
	Guo, Xunzhong 1; Xiong, Hao 1; Li, Heng 2; Xu, Yong 3,6; Ma, Ziqi 4; Abd El-Aty, Ali 3; Ma, Yannan 1; Jin, Kai 5
通讯作者	Xu, Yong(yxu@imr.ac.cn) ; Jin, Kai(jinkai@nuaa.edu.cn)
	2018-10-01
发表期刊	INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
ISSN	0890-6955
卷号	133 页码:72-84
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.
关键词	Free-bending Spherical connection Small bending radii Forming characteristics Finite element simulation Bending test
资助者	Jiangsu Proivince Science and Technology Program ; Natural Science Foundation of Jiangsu Province ; China Aviation Science Foundation ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation
DOI	10.1016/j.ijmachtools.2018.05.005
收录类别	SCI
语种	英语
资助项目	Jiangsu Proivince Science and Technology Program[BE2016156] ; Natural Science Foundation of Jiangsu Province[BK20151469] ; China Aviation Science Foundation[2016ZE52047] ; Fundamental Research Funds for the Central Universities[NS2016059] ; National Natural Science Foundation[51711540301]
WOS研究方向	Engineering
WOS类目	Engineering, Manufacturing ; Engineering, Mechanical
WOS记录号	WOS:000442735800007
出版者	ELSEVIER SCI LTD
引用统计	被引频次：40[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/129160
专题	中国科学院金属研究所
通讯作者	Xu, Yong; Jin, Kai
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, Xunzhong,Xiong, Hao,Li, Heng,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, Xunzhong.,Xiong, Hao.,Li, Heng.,Xu, Yong.,Ma, Ziqi.,...&Jin, Kai.(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, Xunzhong,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.