• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1995.10a
• /
• pp.117-120
• /
• 1995

In this machining process, variation in cutting forces results in relative displacements between the tool and the workpiece leading to tool vibration. Also there is a demand to change the depth of cut very frequently. A soluion for both cases is to develop a system which has the ability to reposition a cutting tool to a very small level, i.e., micron. This ppaper presents the development of a micropositioning system (MPS) using a magnetostrictive material. The deveoped MPS is implemented to a lathe and subjected to static and machining test. The results show that the MPS has good potential for machining application

• Journal of the Korean Society for Precision Engineering
• /
• v.29 no.5
• /
• pp.510-515
• /
• 2012

Feed drive systems are used to position the machine tool components carrying the cutting tool and workpiece to the desired location. Hence, their positioning accuracy and speed determine the quality and productivity of machine tools. In this paper, technical trend of machine tools feed drive systems are analyzed by patent mapping. And this paper suggested future development direction of feed drive systems. The analysis is carried out by using problem solution map (PSM) for the applied patent during January 2000 and December 2009 in Korea, Japan, EU and U.S.A.

• The Journal of Society for e-Business Studies
• /
• v.2 no.1
• /
• pp.117-129
• /
• 1997

As the lifecycle of a product becomes shorter, the communication between a contractor and a supplier in product information has got more importance. The CITIS(Contractor Integrated Technical Information Service) is required to provide authorized users with access to both data and applications they need to complete a task for contract. With the growth of WWW, there has been much study for the use of WWW for the implementation of CALS. The WWW has been proved as an efficient tool for CALS implementation due to its of publicity, openness, and free accessibility. In this study, we suggest using WWW tools, here, an intranet tool, as a basis for the implementation of CITIS

• Journal of the Korean Society of Manufacturing Process Engineers
• /
• v.14 no.1
• /
• pp.117-122
• /
• 2015

There has been a string of negligent accidents at the seaside, and there is presently a shortage of professional equipment to deal with such accidents. The purpose of this paper is to assess the development of a rescue lift. The critical load of a support pipe, and the stability of the rescue lift, were investigated using structural analysis. Critical-load analysis was used to study the effects of variations in the pipe length and the ratio of the moment of inertia. The total weight of the developed rescue lift is approximately 20.7 kg, and the lift passed the load tests.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• v.1 no.1
• /
• pp.104-112
• /
• 2001

Simply, Nonlinear dynamics theory means the complicated and noise-like phenomena originated form nonlinearity involved in deterministic dynamical system. An almost all the natural signals have nonlinear property. However, there exist few analysis software tool or package for a research and development of applications. We develop nonlinear time series analysis simulator is to provide a common and useful tool for this purpose and to promote research and development of nonlinear dynamics theory. This simulator is consists of the following four modules such as generation module, preprocessing module, analysis module and ICA module. In this paper, we applied to Electroencephalograph (EEG), as it turned out, our simulator is able to analyze nonlinear time series. Besides, we could get the useful results using the various parameters. These results are used to diagnostic the brain diseases.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.35 no.2
• /
• pp.16-20
• /
• 2012

The purpose of this thesis is to develop a performance rating training tool for the time and motion study. It is widely recognized that rating training tools based on films were made several decades ago and introduced to Korea. However, to the best of our knowledge, those films are not used for rating training in Korea any more. Furthermore, although rating is still important method for the efficient operational management study, it is briefly mentioned without any training or exercise. In this paper, we propose a simple rating training tool based on Excel with VBA. The mottoes of our development are the ease of acquisition and trainees' motivation. Test results show that trainees can obtain the concept of rating and the ability of accurate and consistent rating as they play a computer game sitting in front of the personal computer.

• Proceedings of the KSME Conference
• /
• 2000.11a
• /
• pp.535-540
• /
• 2000

This paper presents the development of a Parallel-Typed CNC Machining Tool. It is specially designed to machine a complex shaped workpiece by controlling the orientation of the tool. The inverse/direct kinematics of a parallel mechanism is derived and implemented in a PC based controller. With graphics icons, the GUI (Graphic User Interface) program is developed for the CNC programing. The calibration is accomplished by geometric constraint motion, which is a parallel motion of the platform with respect to a table. The calibration result is introduced and the future study is proposed.

• The Journal of the Korea Contents Association
• /
• v.9 no.3
• /
• pp.72-80
• /
• 2009

With the development of IT technologies, IT environment is making great change over life whole and is displacing business and business achievement systems of industry at the fast speed. Software development using project management tool is more important because of constructing the consistent and reliable system. So, design and implementation of the project management tool which support data standardization of project is proposed in this paper.

• Journal of the Korean Society for Precision Engineering
• /
• v.18 no.11
• /
• pp.80-85
• /
• 2001

In Part 2, dynamic cutting force model, thermal behavior model, and feed drive model are presented for development of a virtual machine tool. Some relevant results with brief descriptions for each model are presented to verify the proposed models. Experimental results for each model agreed well with the estimated ones. The developed models in this two-part paper are partially integrated as a comprehensive software environment.

• International Journal of Precision Engineering and Manufacturing
• /
• v.4 no.3
• /
• pp.42-47
• /
• 2003

In Part 2 of this paper, the dynamic cutting force model, thermal behavior model, and feed drive model used in the development of a virtual machine tool (VMT) are briefly described. Some results are presented to verify the proposed models. Experimental data agreed well with the predicted results fer each model. A comprehensive software environment to integrate the models into a VMT is also proposed.