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research-article

A Novel Incremental sheet Bending Process of Complex Curved Steel plate

[+] Author and Article Information
Qiyang Zuo

Shenzhen Key Laboratory of Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, USA, 60208
qy.zuo@siat.ac.cn

Kai He

Shenzhen Key Laboratory of Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Xili Nanshan, Shenzhen, China, 518055
kai.he@siat.ac.cn

Xiaobing Dang

Institute of Precision Engineering, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Room110, William M.W.Mong Eng Bldg, CUHK, Shatin, N.T., Hong Kong, SAR, China
xbdang@mae.cuhk.edu.hk

Wei Feng

Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Xili Nanshan, Shenzhen, China, 518055
wei.feng@siat.ac.cn

Ruxu Du

Professor, F-ASME, F-SME, F-HKIE, Institute of Precision Engineering, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Room 209, William M.W. Mong Eng Bldg, CUHK, Shatin, N.T., Hong Kong SAR, China
rdu@mae.cuhk.edu.hk

1Corresponding author.

ASME doi:10.1115/1.4037428 History: Received April 07, 2017; Revised July 02, 2017

Abstract

Bending complex curved steel plates for constructing ship hull has long been a challenge in shipbuilding industry. This paper presents a novel incremental bending process to obtain complicated curved steel plates by a series of sequential and layered punches. Taking advantage of this process, the blank plate that is fixed and held by a flexible supporting system can incrementally be bent into the target shape by a press tool along a planned tool path step by step and layer by layer. Acting as a "lower die", the flexible supporting system can provide flexible and multifunctional supports for the work piece during the forming process, whose four general motion modes are demonstrated in this paper. Meanwhile, the procedures of tool path planning and forming layering are also explained in detail. In addition, aiming at different motion modes of the flexible supporting system, two springback compensation methods are given. Furthermore, according to the forming principle presented in this paper, an original incremental prototype equipment was designed and manufactured, which is mainly composed of a 3-axis CNC machine, a flexible supporting system and a 3D scanning feedback system. A series of forming experiments focusing on a gradual curvature shape were carried out using this prototype to investigate the feasibility and validity of this forming process.

Copyright (c) 2017 by ASME
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