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Forming characteristics of tube free-bending with small bending radii based on a new spherical connection
Guo, Xunzhong1; Xiong, Hao1; Li, Heng2; Xu, Yong3,6; Ma, Ziqi4; Abd El-Aty, Ali3; Ma, Yannan1; Jin, Kai5
Corresponding AuthorXu, Yong(yxu@imr.ac.cn) ; Jin, Kai(jinkai@nuaa.edu.cn)
2018-10-01
Source PublicationINTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
ISSN0890-6955
Volume133Pages:72-84
AbstractIn 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.
KeywordFree-bending Spherical connection Small bending radii Forming characteristics Finite element simulation Bending test
Funding OrganizationJiangsu 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
DOI10.1016/j.ijmachtools.2018.05.005
Indexed BySCI
Language英语
Funding ProjectJiangsu 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 Research AreaEngineering
WOS SubjectEngineering, Manufacturing ; Engineering, Mechanical
WOS IDWOS:000442735800007
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129160
Collection中国科学院金属研究所
Corresponding AuthorXu, Yong; Jin, Kai
Affiliation1.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
Recommended Citation
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.
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