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유현수(Hyun-Su Ryu),박일환(Il-Hwan Park),고대은(Dae-Eun Ko),김호경(Ho-Kyeong Kim) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.5
국제 해사 기구의 선체 보호 도장 기준이 의무화됨에 따라 조선소에서는 칼라 플레이트의 모서리 부분에 대해 2R 또는 3-pass 밀링 가공을 수행해야 한다. 그러나 기존 수작업 방식에 의존하고 있는 상황에서 2R 또는 3-pass 밀링 가공을 수행한다면 작업 환경 및 생산성 측면에서 많은 문제점이 발생할 것으로 예상된다. 따라서 규정을 만족할 수 있는 모서리 밀링 자동화 시스템을 개발하여 이러한 문제점을 해결할 필요가 있다. 본 연구에서는 표준 칼라 플레이트를 대상으로 모서리 밀링 자동화 시스템 기본 설계를 수행하였고, 형상 인식 및 가공 경로 생성 알고리즘을 적용하여 가공 프로세스를 정립하였다. 또한, 운영 소프트웨어를 구축하고, 전용 가공 툴을 제작하여 밀링 테스트를 수행한 결과를 토대로 적합한 밀링 가공조건을 도출하였다. 향후, 본 연구를 통해 개발된 모서리 밀링 자동화 시스템을 조선소에 도입하여 현장 테스트를 수행하고, 그 결과를 토대로 상용화 연구를 진행한다면 선체 보호 도장 기준을 충족할 수 있는 자동화 시스템을 구축함과 동시에 생산성 향상을 기대할 수 있다. The International Maritime Organization has enacted mandatory performance standards for protective coatings (PSPC), and as a result, shipyards must perform 2R or 3-pass milling on the edges of color plates. However, manual milling could result in many problems in terms of work environment and productivity. Therefore, it is necessary to develop an edge milling automation system that can satisfy the regulations. In this study, a basic design for an edge milling automation system was developed for standard color plates, and the machining process was established by applying shape recognition and a machining path generation algorithm. In addition, operating software was developed, and suitable milling conditions were derived based on the results of a milling test. The results could be used to build an automation system that meets the PSPC requirements and improve productivity.
신택영 한국산업융합학회 2023 한국산업융합학회 논문집 Vol.26 No.4
According to the PSPC (Performance Standard for Protective coatings) rule, the edge preparation must keep 2R or 3-pass grinding. The stiffener plate edge grinding of the ship inside is manually progressed by worker and worked with just one pass grinding. In addition, the poor working condition cause grinding workers to avoid working in them, and the quality is determined by the skill-level of a worker. This research developed optimal tool for edge milling. In order to milling various collar plates edge, this research developed vision system that can recognize the edge points and it developed a program that operator can adjust the amount of cutting and speed, and add various features so that milling quality would be improved. So, this research focused on overcoming the difficulties in working condition and development of automated milling machine for ship stiffener plate.
배한진(Han-Jin Bae),이병헌(Byung-Hun Lee),이채석(Chae-Suk Lee),신칠석(Chil-Seok Shin) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
For application of high-performance coating in a new shipbuilding, the abrasive blasting cleaning is widely favored primarily because of its economic and performance benefits. Blasting cleaning productivity is known to be affected by a number of parameters, such as air pressure at the nozzle, air volume, abrasive/air mixing ratio, abrasive type and size, and type of nozzle used, and so on. To achieve the economic benefits from abrasive blasting, proper selection and matching of these parameters are essential. In this study, a quantitative relationship between blastingrelated operation parameters and blasting efficiency is evaluated, and the optimum blasting conditions are sought, which can dramatically improve the blasting productivity as well as effectively meet new IMO’s PSPC surface preparation requirements. The results clearly indicated that the newly optimized blasting condition can remarkably reduce the amount of abrasive used. Adjusting the profile height by careful selection of the primary variables such as abrasive size and nozzle pressure, which are closely related to the surface roughness, is important in meeting the new IMO standard.
Standard Collar Plate 2R3C가공장비 개발
김은태,이동훈,김호경,김은영 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
Generally, the edge preparation of the ship water ballast tank inside is worked with just one pass grinding. According to the SSP(Secondary Surface Preparation) rule, the edge preparation must keep 2R or 3-pass grinding. The collar plate edge grinding of the ship inside is manually progressed by worker. In addition, the poor working condition cause grinding workers to avoid working in them, and the quality is determined by the skill-level of a worker. So, this research, successfully focused on overcoming the difficulties in working condition and development of automated grinding machine for standard collar plates.