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고속카메라를 이용한 공구 절입시 변형 형상에 관한 연구
김건희,정우철,윤길상,신광호,허영무,Kim, Kun-hee,Jung, Woo-chul,Yoon, Gil-sang,Sin, Kwang-ho,Heo, Yeong-mu 한국금형공학회 2008 한국금형공학회지 Vol.2 No.1
The object of this study is a manufacture of buff die using CAM systems. Systems are consist of AutoCAD, CAM software and CNC milling machine. CAM software is purpose of G-code generation for CNC programming. Then CAM software and CNC milling machine are connect to RS-232-C cable for networking.
중소형 회로 차단기에 적용 가능한 한류 메커니즘의 개발
이제덕,박종식,임재국,박동희,박민호,최계광,김세환,윤재웅,이춘규,Lee, Je-Duk,Park, Jong-Sik,Im, Jae-Guk,Park, Dong-Hee,Park, Min-Ho,Choi, Kye-Kwang,Kim, Sei-Hwan,Yun, Jae-Woong,Lee, Chun-Kyu 한국금형공학회 2016 한국금형공학회지 Vol.10 No.1
Electrical equipment in factories, buildings, etc. with the development of the industry has become a large capacity. By the development, electric load also become diversified and there is also highly functional requirements being electrical equipment. Particularly in the small and medium-sized circuit breakers, tend to preferentially consider the economy stands out and improvements in safety, ease of mounting and connection through the modularity of the basic dimensions compact and cost to block expansion of the scope of the development of capacity, etc. The product having a competitive has been strongly required. In order to implement the circuit breakers of breaking capacity and compact at the same time taking into account the economic development of this technology applied to the current-limiting mechanism is essential budget or the current limiting mechanism is currently available mechanisms applicable to small and medium-sized frame (frame) can not do it. In this paper, at the same time satisfying the economic efficiency, by minimizing the load force of the moving contactor (moving contactor) to be applied to small and medium frame other hand to secure the economical efficiency without using high speed contact parting acceleration of the moving contactor conventional current-limiting mechanism, and to develop a current-limiting mechanism that can be satisfied with the same or higher performance to meet the needs of the market.
백승엽,최승건,정연승,장영주,Baek, Seung-Yub,Choi, Seung-Geon,Jung, Yeon-Seung,Jang, Young-Ju 한국금형공학회 2016 한국금형공학회지 Vol.10 No.1
Beverage industry is the largest in the domestic packaging market. Usually, beverage is packed in palstic, glass, can and paper bags. However, the cost of these packaging methods are very high and the recycling are not easy to handle. Pouch packaging method is one of the packaging method to solve the drawbacks of former beverage containers. The pouch packaging methods are difficult to control, it requires a number of processes. A vertical form-fill-seal machine which is self-developed is the capable of processing in a single apparatus. In this paper, in order to develop a pouch equipment, the structure analysis was carried out for the main unit. The stress and deformation of feed unit which removes the air inside the pouch while feeding down has been analyzed. It receives the greatest impact from the rolling part. And also, the sealing unit has been analyzed. The analysis result shows that the stress and the deformation was slight to be applicable to the actual system.
초고강도강판 드로잉 성형에서 가변 블랭크 홀딩력에 의한 스프링백 경향
곽정환,김세호,정철영,송정한 한국금형공학회 2018 한국금형공학회지 Vol.12 No.3
The production of the automotive parts with the ultra high strength steel usually involves large amount of springback as well as fracture during the cold stamping process. Variable blank holding force(VBHF) can be used as one of the effective process parameters to reduce the springback amount with achieving better condition of formability. In this paper, VBHF with respect to the punch stroke is applied to the stamping process of the front side rear lower member for reducing the springback amount. From the analyses with constant blank holding force(CBHF), 24 kinds of VBHF conditions are utilized to investigate the springback tendency. It is noted that springback can be effectively reduced when BHF is increased near the bottom dead center because VBHF provides the tensile force to the blank with an adequate level of deformation without fracture
분무용 펌프 구동 벨트풀리의 다이캐스팅 금형설계 및 제작에 관한 연구
이은종,최계광,김세환,Lee, Eun-jong,Choi, Kye-kwang,Kim, Sei-hwan 한국금형공학회 2013 한국금형공학회지 Vol.7 No.1
Orchard sprayers, wide area dusters and multipurpose control cars are flagship products of Hansung T&I Ltd. Spray pumps are one of the essential parts for these products. But conventional belt pulleys for spray pumps are heavy and expensive, and they bring down the quality as well as productivity of the end-products. Therefore, this study focuses on mold design for aluminum die casting belt pulley and mold manufacture.
블랭크 홀딩력 조절을 통한 성형성 향상에 관한 수치적 연구
최현석,정완진,Choi, Hyun-Seok,Chung, Wan-jin 한국금형공학회 2016 한국금형공학회지 Vol.10 No.1
In sheet metal forming process, drawing is typical process. And the key factor of drawing is blank holding force (BHF) A low BHF can cause wrinkling, whereas a high BHF can cause fracture during a deep drawing process. Thus, formability can be influenced by application appropriate BHF. In this study, a variable blank holding force (VBHF) is applied to extend the forming limit by avoiding both wrinkling and fracture. To determine VBHF in drawing process, numerical simulations and statistical analysis are carried out using commercial FEM software.
한규택,Han, Kyu-Taek 한국금형공학회 2013 한국금형공학회지 Vol.7 No.1
The finite element method(FEM) presents some limitations when the mesh becomes highly distorted. For analysis of metal forming processes with large deformation, the conventional finite element method usually requires several remeshing operations due to severe mesh distortion. The new computational method developed in the recent years, usually designated by meshfree method, offers an attractive approach to avoid those time-consuming remeshing efforts. This new method uses a set of points to represent the problem domain with no need of an additional mesh. Also this new generation of computational method provides a higher rate of convergence than that of the conventional finite element methods. One of the promising applications of meshfree methods is the adaptive refinement for problems having multi-scale nature. In this study, an adaptive node generation procedure is proposed and also to illustrate the efficiency of proposed method, several numerical examples are presented.
노병수,정영득,Noh, Byeong-Su,Jeong, Yeong-Deug 한국금형공학회 2007 한국금형공학회지 Vol.1 No.1
In recent, recycling of plastic material has became a major issue due to the landfills and environmental problem. This study investigated fluidity and hardness of thermoplastic vulcanizate(TPV), which is used for automobile component parts such as weather strip in order to replace ethylene propylene rubber (EPDM). So, using the spiral flow test mold, we conducted an experiment on fluidity and hardness of TPV according to injection molding conditions. As results of injection molding experiment, the recycled TPV's flow length was a little bit longer than virgin TPV and the hardness was decreased in case of using the recycled resin. Also, we investigated the morphology study by SEM photo.
마그네슘 박판의 전자부품 적용을 위한 마이크로 디버링에 관한 연구
이정인,김태완,곽재섭,정영득,Lee, Jung-In,Kim, Tae-Wan,Kwak, Jae-Seob,Jung, Young-Deug 한국금형공학회 2012 한국금형공학회지 Vol.6 No.2
Drill process is usually used to manufacture a industry about processing, Therefore, the burr problem is very significant, The burrs took place when drill process. And then, sometimes, the burrs are often caused of some problems during automatic such as no good quality products and having good surface roughness products. And also, this paper had some experiments using magnesium. Specially, the magnesium is one of the non-ferromagnetic materials. Magnesium has attracted a lot of interest for using the industry. They offer a possible alternative to steel and aluminum in automotive and aero industries to satisfy the lightweight requirement. also, magnesium has good specific strength and absorbs vibration in occurring working process. So, it has good quality of product processing. And then, it is one of the lightest materials being used to electronic product's cases and automotive because of lightweight and miniaturization. But this material has not widely used all of the industry due to its natural property. If the magnesium is contacted water, it will cause the exploration. But, nowadays many of people study magnesium to safe their experiment and to widely use this industry.
이성희,고영배,이종원,정해철,박재현,이옥성,Lee, Sung-Hee,Ko, Young-Bae,Lee, Jong-Won,Jung, Hae-Chul,Park, Jae-Hyun,Lee, Ok-Sung 한국금형공학회 2012 한국금형공학회지 Vol.6 No.2
A multi-cavity injection mold system of protein chip for point-of-care with cavity temperature and pressure sensors was proposed in this work. In advance of manufacturing for the multi-cavity injection mold system, a single cavity injection mold system to mold protein chip was considered. Injection molding analysis for the presented system was performed to optimize the process of the molding and suggest guides to design. On the basis of the results for the single cavity system, a multi-cavity injection mold system for protein chip was analyzed, designed and manufactured with cavity temperature and pressure sensors. Results of balanced filling for protein chip models were obtained from the presented mold system.