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Single Action Analysis for Lumbar Spinal Loads on Digital Korean Model
무랄리(Murali Subramaniyam),박상호(Sangho Park),서효나(Xu Xiaona),박경호(Piao Jinghu) 대한인간공학회 2010 대한인간공학회 학술대회논문집 Vol.2010 No.10
The objective of this study was to examine the lumbar spinal loads of Korean adults using Digital Korean Model (DKM). DKM is a computerized model to represent Korean Ethnics structures and functions in the virtual environment. The low back officially begins with the lumbar region of the human spinal structure. The lumbar vertebrae are most frequently involved in low back pain, which carries the most amount of body weight and are subject to the largest forces and stresses along the spine. DKM’s standard and variable postures were modeled in the virtual environment, standing and sitting posture cases were used in this study. The analyses of lumbar spinal loads were based on the single action and six different percentiles (5, 10, 25, 50, 75 and 95th ) were considered for the analyses. The study will be providing the guideline to know how much load Korean adults can carry without affecting their back, to know whether carrying load is within the limit and to know the effects on L4-L5 for a particular load, percentile and posture.
AN EFFICIENCY INDEX PROPOSAL FOR DIGITAL MICRO ASSEMBLY PROCESS
무랄리(Murali Subramaniyam),박상호(Sangho Park),최성일(Sung-il Choi),장석호(Seokho Jang),송준엽(Joon Yub Song),이창우(Chang Woo Lee) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
Microfactory, a miniature manufacturing system is considered as a means of achieving higher throughput with minimal amount of space and minimal utilization of both energy and resources by downsizing of production processes. Even though the micro factory was able to perform the whole manufacturing process like macro factory, the possibilityof the micro factory to improve its manufacturing efficiency for manufacturing of micro parts has not been considered enough. In this paper, an efficiency index is proposed to calculate the efficiency of the micro assembly process in digital environment. An assembly process is one of the manufacturing process in which interchangeable parts are added to a product in a sequential manner to create a finished product. The 3D CAD model of the micro lens module assembly is taken as an example, and the assembly processes required to assemble the lens module assembly has been discussed here. The product, processes and resources of the micro factory has been modeled using the 3D CAD system.
AN EFFICIENCY INDEX PROPOSAL FOR DIGITAL MICRO ASSEMBLY PROCESS
무랄리(Murali Subramaniyam),박상호(Sangho Park),최성일(Sung-il Choi),장석호(Seokho Jang),송준엽(Joon Yub Song),이창우(Chang Woo Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
Microfactory, a miniature manufacturing system is considered as a means of achieving higher throughput with minimal amount of space and minimal utilization of both energy and resources by downsizing of production processes. Even though the micro factory was able to perform the whole manufacturing process like macro factory, the possibilityof the micro factory to improve its manufacturing efficiency for manufacturing of micro parts has not been considered enough. In this paper, an efficiency index is proposed to calculate the efficiency of the micro assembly process in digital environment. An assembly process is one of the manufacturing process in which interchangeable parts are added to a product in a sequential manner to create a finished product. The 3D CAD model of the micro lens module assembly is taken as an example, and the assembly processes required to assemble the lens module assembly has been discussed here. The product, processes and resources of the micro factory has been modeled using the 3D CAD system.
최성일(Sung-il CHOI),박상호(Sangho PARK),무랄리(Murali SUBRAMANIYAM) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.5
Assembly is mentioned as important process saving time and cost where we produce the machine with many parts relationships. In this study, parts assembly relationship is analysed for assembly information of micro milling machine which have been developing for research. Liaison diagram, datum flow chain and assembly tree are applied to discuss assembly characteristics of micro milling machine model. We can find out the characteristics of micro machine assembly and discuss about facility of assembly. Some analysis in this paper about micro milling machine will give a useful tools for assembly. We knew that the predicted results from analysis in this study are alignment and clearance among the parts. The 3D model of micro machine which is studied in this paper is not a complete model. Main parts of a micro milling machine are used and presented.
최성일(Sung-il CHOI),박상호(Sangho PARK),무랄리(Murali SUBRAMANIYAM),장석호(Seok-Ho JANG) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
Assembly is mentioned as important process saving time and cost where produce the machine with many parts relationships. In this study, parts assembly relationship is analysed for assembly information of micro milling machine. Liaison diagram, datum flow chain and assembly tree are discussed for a micro milling machine model which have been developing for research. We can find out the characteristics of micro machine assembly and discuss about more facility of assembly. We need a information about assembly characteristics. Some analysis in this paper about micro milling machine will give a useful tools for assembly. The 3D model of micro machine which is studied in this paper is not complete model. Main parts of a micro milling machine are used and presented.
사각패턴으로 구축된 초소형 공장의 디지털 조립 시뮬레이션
박상호(Sangho PARK),최성일(Sung-Il CHOI),무랄리(Murali SUBRAMANIYAM),서주현(Joo hyun SEO),송준섭(Joon Yub SONG),박세진(Se Jin PARK) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.5
In recent years, most of the researchers have been working on micro system manufacturing technological environment. With this international trend and one of the key researches in Korea, this paper gives the keynote on manufacturing the micro-scaled part with digital micro factory and its simulation. In order to construct and estimate reconfigurable simulation time, the digital simulation has been performed for the micro factory and for ultra small machines. From simulation result we came to know that micro factory requires less work-in space and processing time to manufacture micro-scaled part with different environment.