• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.10
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• pp.5919-5924
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• 2014

Accumulated dross adhered to the cutting support degrades the cutting accuracy and aggravates the working environment by reducing the efficiency of the dust collector. Furthermore, the cutting machine and product can be damaged by the scattering of molten metal. In this study, an attempt was made to increase the productivity of steel cutting process and improve the working environment by dross control. The dross adhesion characteristics were invested by a cutting experiment and the design concept for a dross removal machine was devised. Finally, a cutting support cleaning system and its operating algorithm were developed. The applicability of the developed system was examined and verified by a long-term field test after installation of the plasma arc cutting system of a shipyard.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.697-703
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• 2002

본 연구에서는 선박 건조 공정 중 블록조립공정을 다룬다 블록과 정반(bay)의 정보가 주어져 있을 때, 각 블록의 조립작업을 하게 될 정반과 조립작업을 시작하는 시작시점을 결정해야 한다. 정반에서 중요하게 고려할 두 가지 자원은 바로 면적과 시수이다. 본 연구에서 다루는 문제의 목적식은 정반에 할당피지 못하거나 작업시점을 결정하지 못해 작업을 할 수 없게 된 실패 블록의 수를 죄소화시키는 것과 시수 부하의 부하평준화를 이루는 것이다. 이 문제를 풀기 위해 제약만족기법(CSP)에 기반을 두는 알고리듬을 제안한다. 그리고 이 알고리듬은 실제 데이터를 가지고 실험을 하게 되며 그 결과와 기존의 일정계획 결과와 비교 분석하게 될 것이다.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.8 no.4
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• pp.99-105
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• 1999

The flatness is the most important nature for the surface plates. For finding such a flatnes a surface plate is surveyed along a number of straight lines parallel to the edges of plate which form a grid pattern. Next the variations in height of the grid points are measured relative to a datum point. the relation between the number of such grid points and the flatuness of a measured surface plate is formulated in this study. In addtion it is found that the grid-point-numbers suggested by KS B 5254 and JIS B 7513 have very poor reliability for estimation of flatness incase of the surface plates with poor original flatness.

• Journal of Industrial Technology
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• v.18
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• pp.181-186
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• 1998

The flatness is the most important nature for the surface table. For finding such a flatness, the surface is surveyed along a number of straight lines parallel to the edges of table, which form a grid. Next, the variations in height of the grid points are measured relative to a datum point. If the number of such points is increased. It is not necessarily to use many grid points for finding the original flatness of a measured surface table. So, it is necessary to find the rational quantity of such grid points. It is found that about 220 points per $1m^2$ of surface table for measurement is the rational quantity with less than about 15% error of the original flatness.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.157-158
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• 2009

• Proceedings of the KWS Conference
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• 1999.05a
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• pp.247-249
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• 1999

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.409-410
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• 2012

• IE interfaces
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• v.8 no.2
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• pp.95-103
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• 1995

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.241-242
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• 2011

• Journal of the Society of Naval Architects of Korea
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• v.51 no.3
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• pp.203-211
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• 2014

To raise the industrial competitiveness in the field of ship-building, it is crucially important that the yard should use production facilities and working space effectively. Among the related works, the management of tremendous blocks' number, the limited area of assembly shops and inefficient personnel and facility management still need to be improved in terms of being exposed to a lot of problems. To settle down these conundrums, the various strategies of block arrangement on the assembly floors have been recently presented and in the results, have increasingly began to be utilized in practice. However, it is a wonder that the sampled or approximated block shapes which usually are standardized projections or the geometrically convex contour only have been prevailed until now. In this study, all parts including the panel, stiffeners, outer shells, and all kinds of outfitting equipment are first extracted using the Volume Primitive plug-in module from the ship customized CAD system and then, the presented system constructs a simpler and more compact ship data structure and finally generates the novel projected contours for the block arrangement system using the adaptive concave hull algorithm.