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A new approach to determining heating parameters suitable for hull plate forming by torch line heating

Thai Gia Tran, Viet T. Doan
2021 Journal of Naval Architecture and Marine Engineering  
This research has been applied for forming by torch line heating of two plates, denoted K1 and K10, in the bulb bow of a 20,000 DWT cargo ship, built at Camranh Shipyard in Vietnam with the deformation  ...  Base on this, the suitable position and temperature for the heating lines in the forming process are determined to form a metal plate into hull plates with the exact desired shapes.  ...  In shipbuilding, two main methods widely used to form hull plates are mechanical forming and heating forming.  ... 
doi:10.3329/jname.v18i2.51412 fatcat:sbxafheyybalhpvtrdgisavoxa

APPLICATION OF THREE - DIMENSIONAL SOLID MODELING OF VIRTUAL REALITY TECHNOLOGY IN SHIP ASSEMBLING

2017 International Journal of Mechatronics and Applied Mechanics  
it more convenient for the frontline workers to operate in reality, so as to improve the shipbuilding efficiency and shorten the shipbuilding cycle.  ...  In the traditional shipbuilding industry, the shipbuilding period is usually long and frontline workers tend to make mistakes because of negligence of small details while making ship fitting according  ...  In the design of the rib plate, the main components of the watertight and non-watertight fins are flat plates.  ... 
doi:10.17683/ijomam.issue1.5 fatcat:yp6fwewapfcvzaze7hepif6ufm

The Development of Log Aesthetic Patch and Its Projection onto the Plane

Yee Meng Teh, R. U. Gobithaasan, Kenjiro T. Miura, Diya' J. Albayari, Wen Eng Ong
2022 Mathematics  
Since LoCs are essential in shipbuilding for hot and cold bending processes, we investigated the LAP in terms of the LoC's curvature, derivative of curvature, torsion, and Logarithmic Curvature Graph (  ...  To identify its versatility, we approximated the hyperbolic paraboloid to LAP using the information of lines of curvature (LoC).  ...  Special thanks to the anonymous reviewers for their comments that helped us improve the readability of this paper. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/math10010160 fatcat:gwkp5hhodvdobbjhdamvc5zt7i

Simulation and optimization analysis of ship production logistics

Guoqing Zhang, Xincheng Ma, Xiaofeng Meng
2019 International Journal of Engineering and Applied Sciences (IJEAS)  
In order to better study the production logistics management of shipbuilding, this chapter takes the ship segmentation as the research object, uses eM-Plant to simulate the ship segment production line  ...  To this end, this paper has conducted in-depth research on the material management of the assembly shipbuilding model.  ...  The surface subsection structure is complex, the curvature of the outer plate is relatively large, the plane subsection structure is relatively simple, and the outer plate is straight, as shown in the  ... 
doi:10.31873/ijeas.6.8.2019.11 fatcat:2fq2okms3bhy7p6dfa7sda6jai

Page 330 of Naval Engineers Journal Vol. 66, Issue 2 [page]

1954 Naval Engineers Journal  
The ac- OPTICAL MARKING-OFF SYSTEM FOR PLATES AND SECTIONS IN SHIPBUILDING ceptable minimum, however, renders it necessary to have a slight camber in the marking table.  ...  This camber is about 1:5 in. in a length of 10 m. and is adjusted for definition during as- sembly. MARKING-OFF PLATES The projected lines have a thickness of 1.0 to 15 mm. and are rather sharp.  ... 

Estimation of In-Plane Strain for Laser Forming

Tetsuya AKIYAMA, Toshio TERASAKI
2009 QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY  
Introduction In-plane strain is widely used to form curved surface of thin plate. Line heating 1) is used to create in-plane strain in the shipbuilding industry.  ...  To gradually increase heat input near the side of a specimen, travel speed of the laser touch is controlled for 5 short lines of 7mm in length as shown in Fig. 2 and Table 2 .  ... 
doi:10.2207/qjjws.27.225s fatcat:ljkep46w7ffmrcr2vrodcdvot4

Estimation of geometry-based manufacturing cost of complex offshore structures in early design stage

Jong-Ho Nam, Sehwan Sohn, David J. Singer
2012 International Journal of Naval Architecture and Ocean Engineering  
A scalar metric for the assessment of hull surface producibility was known to be useful in estimating the complexity of a hull form of ships or large offshore structures by looking at their shape.  ...  The final scalar metric thus consists of the classes containing inner members with various curvature magnitudes as well as the classes containing curved plates with single and double curvature distribution  ...  The authors are also grateful for the financial support from the "Manpower Development Program for Marine Energy" by the Ministry of Land, Transport & Maritime Affairs.  ... 
doi:10.2478/ijnaoe-2013-0097 fatcat:vhjboe72lravlcuvcxg6quxqse

Estimation of geometry-based manufacturing cost of complex offshore structures in early design stage

Jong-Ho Nam, Se-Hwan Sohn, David J. Singer
2012 International Journal of Naval Architecture and Ocean Engineering  
A scalar metric for the assessment of hull surface producibility was known to be useful in estimating the complexity of a hull form of ships or large offshore structures by looking at their shape.  ...  The final scalar metric thus consists of the classes containing inner members with various curvature magnitudes as well as the classes containing curved plates with single and double curvature distribution  ...  The authors are also grateful for the financial support from the "Manpower Development Program for Marine Energy" by the Ministry of Land, Transport & Maritime Affairs.  ... 
doi:10.3744/jnaoe.2012.4.3.291 fatcat:yhurkiipqvbnrn3dv4gfykjs3u

Automated local line rolling forming and simplified deformation simulation method for complex curvature plate of ships

Yao Zhao, Changcheng Hu, Hongbao Dong, Hua Yuan
2017 Mechanical Sciences  
</strong> Local line rolling forming is a common forming approach for the complex curvature plate of ships.  ...  Moreover, it was also utilized to calculate the local line rolling forming for the typical complex curvature plate of ships.  ...  As far as the current shipbuilding enterprises are concerned, line heating and mechanical cold press forming are often used for manufac-turing these curvature plates.  ... 
doi:10.5194/ms-8-137-2017 fatcat:4lq7siajnfcphobzw2egphs4f4

Digital design and manufacture based on Chiloean boats

David Butelmann Dujovne, Claudio Labarca Montoya
2008 International Journal of Architectural Computing  
[6] Boats in this area are known for being hand-made, built mainly of wood and structured around a keel, frames and lining.  ...  Semi-structural skin In Chiloean boats, wood boards, which form the plating, are part of the hull's structural complement. it performs a similar function in the case of the analog model guided by the ship.This  ... 
doi:10.1260/147807708785960049 fatcat:cv7gvk5cqreunf2edvquwn6az4

Digital Design and Manufacture Based on Chiloean Boats

David Butelmann Dujovne, Claudio Labarca Montoya
2008 International Journal of Architectural Computing  
[6] Boats in this area are known for being hand-made, built mainly of wood and structured around a keel, frames and lining.  ...  Semi-structural skin In Chiloean boats, wood boards, which form the plating, are part of the hull's structural complement. it performs a similar function in the case of the analog model guided by the ship.This  ... 
doi:10.1260/1478-0771.6.3.317 fatcat:5nx4gdbl6jfbvkbsumnoa5hsai

Prediction of steel plate deformation due to triangle heating using the inherent strain method

Chang Doo Jang, Tae Hoon Kim, Dae Eun Ko, Thomas Lamb, Yun Sok Ha
2005 Journal of Marine Science and Technology  
The authors express sincere gratitude for the support. The authors also thank and Hyun Soo Ryu, Seoul National University, for his help in preparing this manuscript.  ...  It is shown that the present approach and the model used in this study are effective and efficient for simulating triangle heating for the steel plate forming process in shipbuilding.  ...  This approach and the model used in this study were shown to be an effective and efficient to simulate triangle heating for the steel plate forming process in shipbuilding 6.  ... 
doi:10.1007/s00773-005-0202-5 fatcat:ileporjohvdwrp67zvcdfp57c4

Welding Distortion Analysis of Hull Blocks using Equivalent Load Method Based on Inherent Strain

Yong Tai Kim, Tae Jun Kim, Tae Yoon Park, Chang Doo Jang
2012 Journal of Ship Research  
In the case of hull block welding work in shipyard, the welding process of curved stiffened plate has large amounts of workload.  ...  This paper suggests an efficient method for predicting the welding deformation of stiffened curved plates based on the inherent strain theory combined with the finite element method.  ...  Acknowledgement Part of this work was supported by the Ship Structures Committee (SSC).The authors wish to acknowledge for its support.  ... 
doi:10.5957/josr.56.2.090006 fatcat:nz5urrt3lnhtfaf73ald2dyn64

Engineering for Ship Production

Thomas Lamb
1987 Journal of Ship Production  
of U.S. shipbuilding.  ...  Engineering for Ship Production is the use of production-oriented techniques to transmit and communicate design and engineering data to various users in a shipyard.  ...  Even though plate forming by line heating enables complex shapes to be processed without rolling and packing or pressing, it obviously is still additional work content compared to a single-curvature plate  ... 
doi:10.5957/jsp.1987.3.4.274 fatcat:bvkdup7lb5ghpjogrwslfdbvv4

T-bar Rolling Process with Universal and Edger Mills

Yukio Takashima, Naoki Nakata
2014 Procedia Engineering  
Use of T-bars in shipbuilding has increased recently.  ...  As a result, T-bars for ships are typically fabricated by welding two plates. To solve this problem, a new rolling method for T-bars using a universal mill and edger mill was investigated.  ...  Thus, the new edger produced a suitable cross section for welding with plates in shipbuilding.  ... 
doi:10.1016/j.proeng.2014.09.149 fatcat:65o4ntqqsvesvgtg7qtqhk7z3e
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