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이춘만,류승표,정원지,정종윤,고태조 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
High-speed machining is one of the most effective technology to improve productivity. Because of the high speed and high feed rate, high-speed machining can give great advantages for the machining of dies and molds. This paper describes on the improvement of machining accuracy in high-speed machining and an estimate about machining accuracy of high-speed machining.
이춘만,류승표,정원지,정종윤,고태조 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
High-speed machining is one of the most effective technology to improve productivity. Because of the high speed and high feed rate, high-speed machining can give great advantages for the machining of dies and molds. This paper describes on the improvement of machining accuracy in high-speed machining and an estimate about machining accuracy of high-speed machining.
이춘만,신성우 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-
A tray inserting machine is developed for automation of inserting plastic mold tray into a cardboard box. Plastic mold tray is used for protecting breakage of glass bottles. In this paper, two types of processes to divide the plastic mold tray are proposed. As a result, adhesion method by vacuum pad is accepted. And, static and modal analysis for the machine are also carried out to check the machine design using the commercial software, CATIA V5.
이춘만,송인성 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-
Shirink wrapping is one of the most effective technologies to reduce wrapping cost. This study presents on the development of a machine for shrink wrapping of cans or drink bottles with thermoplastic films. Structural analysis by CATIA was carried out to give basic design data. The accurate position control, the safety factor of chains, the reduction ratio of the chain and gear, the appropriate heating temperature for banding vinyl are discussed for the optimum shrink wrapping M/C design.
Flying Optics 방식 Laser Cutting M/C 개발에 관한 연구
이춘만,임상헌 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-
A flying optics type laser cutting M/C is developed for the precise cutting of sheet metal. The M/C is a flying optics type one with specified functions of movability and strength in order to increase workability. The gantry frame should be moved with a certain velocity within a relatively short time for the proper cutting of object materials. The gantry is actuated by rack and pinion. This study focused on modal and structural analysis for a laser cutting M/C to give basic design data on the development of the machine. The machine is modeled by placing proper shell and solid finite elements and fictitious mass properties to represent the real one. In order to improve the accuracy of this machining center, feed errors are measured by a laser interferometer.
고속 원심분리장치의 확산판에 따른 3상 분리효율에 관한 연구
이춘만,정호인 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.10
Recently, as the high-precision machinery industry has developed rapidly, peripheral equipment has been developed to improve machining efficiency. Peripheral equipment for machining includes cooling units, housings, oil separators, and much more. Oil, such as cleaning and cutting fluids, is used for machining. When waste oil is reused, the contamination of the workpieces and reduction in machining accuracy are generated by the waste oil, including sludge. Therefore, the development of an oil separator is necessary for efficiently separating oil, water, and sludge. The purpose of this study is to analyze the oil separation efficiency and flow characteristics of a high-speed centrifugal separator according to the rotation velocity and diffusion plate. The oil separation efficiency and flow characteristics were analyzed using hydrodynamic theory and computational fluid dynamics (CFD). The results of this study will be used as basic data for the development of a high-speed centrifugal separator.
CNC Spinning 공정 개발 및 설계 자동화에 관한 연구
이춘만,허태목 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-
Spinning has been used widely for the manufacture of hollow parts with rotational symmetry. With developing CNC machine, CNC machine center can be applied to the spinning processes. In this paper, a study on the development of CNC spinning technology without mandrel and an automated program for the design of the spinning process is carried out. The deforming process of the spinning process was simulated by DEFORM 3D to give basic design data.
고융점 소재의 열 보조 가공에서 레이저-플라즈마 다중열원의 예열 효과에 대한 연구
이춘만,김성규 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.10
Recently, with the development of the aerospace and automotive industries, the demand for high-melting-point materials has increased. However, high-melting-point materials are difficult to cut through conventional machining methods. Thermally assisted machining (TAM) is a method for improving the machinability by preheating the materials. A laser, the most commonly used device for TAM, has high efficiency through local preheating but is not sufficient for maintaining a high preheating temperature due to rapid cooling. However, the use of multi-heat sources can supplement the disadvantage of a single heat source. The high preheating temperature can be maintained with a wide and deep heat-affected zone (HAZ) by multi-heat sources. The purpose of this study is to analyze the preheating effects of multi-heat sources using laser plasma. Thermal analysis and preheating experiments were carried out. As a result, the high preheating effect of multi-heat sources compared with a single heat source was verified.