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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Manufacturing Technology Engineers
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Journal DOI :
The Korean Society of Manufacturing Technology Engineers
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Volume & Issues
Volume 20, Issue 6 - Dec 2011
Volume 20, Issue 5 - Oct 2011
Volume 20, Issue 4 - Aug 2011
Volume 20, Issue 3 - Jun 2011
Volume 20, Issue 2 - Apr 2011
Volume 20, Issue 1 - Feb 2011
Selecting the target year
Remote Control System for Textile Machinery using High Speed Power Line Communication
Cha, Joo-Heon ; Jun, Sung ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 1~6
This paper describes the high speed PLC-based remote control system that can monitor and control textile machineries bi-directionally through Internet. There are many textile machineries without network functions in the factory. We apply the PLC technology in order to give a network function to them in which the existing electric power line is used with network communication lines without separate wiring constructions. In order to realize this system, we have implemented a protocol for network communication of system, high-speed PLC modules, and Ethernet-to-UART modules. Finally we confirmed the effectiveness of system by applying actual test environments.
Structural Analysis of Excavator Arm and its Connection Pins
Han, Moon-Sik ; Cho, Jae-Ung ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 7~12
Hydraulic excavator in digging at the construction machinery is a widely used mechanical device. Excavator attachments are taken with structural load and fatigue during digging under applied reaction. Fatigue analysis is done at joint pin between bucket and arm of front attachment at excavator under the force of hydraulic cylinder in operation. It is analyzed how load can be supported at the lower driving body applied on the bucket. In this study, the deformation of arm and the fatigue result are examined when reaction force is applied on the attachment of excavator.
치과 임플란트 수술 보조 로봇(ARDIS) 시술 방법
Kim, Gwang-Ho ; Jo, Yeon-Sul ; Gang, Dong-Wan ; Jeong, Sang-Hwa ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 9~14
New Design of Cap Type Filter for Oil Mist Removal
Kim, Hong-Gun ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 13~16
It is a tendency where the number of the restaurant is increasing recently with advancement of the food service industry. In comparison, Noxiousness fine MIST and the removal are passively done in about offensive odor which occurs meat products processing as emitting like that in the atmosphere. Because adherence lamination in the exhaustion line pipe has need of a periodic cleaning and change, it must discontinue the business of long time. In this paper, The technique development on fine MIST, dust of offensive odor and filtering which occur meat products processing prevents adherence/lamination of fine MIST in exhaustion line pipe. And the source prevents the environmental matter which is emitted in the atmosphere under maximizing boil offensive odor and the filtering effect of noxiousness MIST.
인공관절 수술로봇에서의 3차원 좌표 측정기 활용
Kim, Seok-Min ; Park, Jong-O ; Park, Seok-Ho ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 15~23
Energy Absorption Characteristics of Composite Laminated Structural Member According to the Interface Number
Hwang, Woo-Chae ; Lee, Kil-Sung ; Cha, Cheon-Seok ; Jung, Jong-An ; Han, Gil-Young ; Yang, In-Young ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 17~22
Ultimate goals in vehicle design can be summarized as environment-friendliness and safety. Along with these requirements, the importance of natural environment conservation has been focused lately. Therefore, reduced emission from vehicle and improved efficiency has become the top priority projects throughout the world. CFRP(Carbon Fiber Reinforced Plastics) of the advanced composite materials as structure materials for vehicles, has a widely application in lightweight structural materials of air planes, ships and automobiles because of high strength and stiffness. This study is to investigate the energy absorption characteristics of CFRP hat-shaped section members under the axial impact collapse test. The CFRP hat-shaped section members which manufactured from unidirectional prepreg sheets were made of 8plies. The axial impact collapse tests were carried out for each section members. The collapse mode and energy absorption characteristics were analyzed for CFRP hat-shaped section member according to the interface numbers(2, 3, 4, 6 and 7).
Simulation Analysis on Air Stream Around the Tail Wing of Airplane
Han, Moon-Sik ; Cho, Jae-Ung ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 23~27
This study analyzes about the variation of pressure and stream velocity according to the movement of tail wing. The pressure at the front part of airplane becomes lower than at the rear part and the stream velocity has decreased by being bumped against the wing of airplane. The pressure at the front part of rudder becomes higher than at its rear part according to the movement of rudder among the tail wings of airplane. The more stream velocity becomes decreased, the more rudder spreads out. As the tail wing of airplane folds, the pressure at its front part becomes higher. And the pressure at its rear part becomes lower than at its front part. The more tail wing of airplane folds, the more stream velocity becomes decreased.
Structural Design for 2kW Class Wind Turbine Blade by using Design of Experiment
Lee, Seung-Pyo ; Kang, Ki-Weon ; Chang, Se-Myong ; Lee, Jang-Ho ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 28~33
In this paper, structural design for 2kW class composite blade is performed by using design of experiment(DOE). A full factorial design is applied to meet the design specifications at the manufacturing process. The analysis of variance(ANOVA) is made in order to determine the significance of effects in an analysis. Structural analysis by using of commercial software ABAQUS is performed to compute the displacement and safety factor of filament wound composite blade. The results show that the proposed method is suitable to analyze the factors at the design of wind turbine blade.
The Arrangement of Heaters for Rubber Injection Molds using FEM and Optimal Design Method
Kim, Myung-Hun ; Han, Jeong-Young ; Choi, Eun-Ho ; Bae, Won-Byong ; Kang, Sung-Soo ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 34~39
Temperature control of a rubber injection mold is important for the dimensional accuracy of product. The main objective of this paper is to optimize the arrangement of heaters by FEM and optimal design method. Firstly, 3-dimensional transient heat transfer analysis was carried out for a square specimen mold. Results of FE analysis are a good agreement with the experimental results, showing about 1.22~7.22% error in temperature distribution. Secondly, we suggested the optimal method about an arrangement of heaters of rubber injection mold by using the optimal design technique. Distances between heater's center and the contact surface of mold, distances between heater's center and symmetric surface were considered as design variables. And the variances between the temperatures of cavity surfaces and their average temperature were used as the objective functions. Applying the optimal solution, the temperature variation was improved about 52.9~88.1 % compared to the existing mold. As a result of sensitivity analysis for design variables, design variables parallel to the direction of the split plane in mold affect the largest on the surface temperature variation in mold cavity.
Stability Analysis of High-speed Driveshafts under the Variation of the Support Conditions
Shin, Eung-Su ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 40~46
This paper is to investigate the effects of the asymmetrical support stiffness on the stability of a supercritical driveshaft with asymmetrical shaft stiffness and anisotropic bearings. The equations of motion is derived for a system including a rigid disk, a massless flexible asymmetric shaft, anisotropic bearings and a support beam. The Floquet theory is applied to perform the stability analysis with the variation of the support stiffness, the shaft asymmetry, the shaft damping and the shaft speed. The results show that the asymmetric support stiffness is closely related to the stability caused by primary resonance as well as the supercritical operation. First, the stiffness variation can stabilize the system around primary resonance by weakening the parametric resonance from the shaft asymmetry. Second, it also improve the stability characteristics at a supercritical operation when the support stiffness is not so high relative to the shaft stiffness.
One-Sided Nondestructive Evaluation of CFRP Composites By Using Ultrasonic Sound
Im, Kwang-Hee ; Zhang, Gui-Lin ; Choi, Sung-Rok ; Ye, Chang-Hee ; Ryu, Je-Sung ; Lim, Soo-Hwan ; Han, Min-Gui ; Hsu, David K. ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 47~52
It is well known that stiffness of composites depends on layup sequence of CFRP(carbon fiber reinforced plastics) laminates because the layup of composite laminates influences their properties. Ultrasonic NDE of composite laminates is often based on the backwall echoes of the sample. A pair of such transducers was mounted in a holder in a nose-to-nose fashion to be used as a scanning probe on composites. Miniature potted angle beam transducers were used (Rayleigh waves in steel) on solid laminates of composites. Experiments were performed to understand the behavior of the transducers and the nature of the waves generated in the composite (mode, wave speed, angle of refraction). C-scan images of flaws and impact damage were then produced by combining the pitch-catch probe with a portable manual scanner known as the Generic Scanner ("GenScan"). The pitch-catch signal was found to be more sensitive than normal incidence backwall echo of longitudinal wave to fiber orientation of the CFRP composites, including low level porosity, ply waviness, and cracks. Therefore, it is found that the experimentally Rayleigh wave variation of pitch-catch ultrasonic signal was consistent with numerical results and one-side ultrasonic measurement might be very useful to detect the defects.
Measurement of Tool Wear using Machine Vision in Flat End-mill
Kim, Tae-Young ; Kim, Eung-Nam ; Kim, Min-Ho ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 53~59
End milling is available for machining the various shape of products and has been widely applied in many manufacturing industries. The quality of products depends on a machine tool performance and machining conditions. Recognition characteristics of the cutting condition is becoming a critical requirement for improving the utilization and flexibility of present-day CNC machine tools. The measurement of tool wear would be performed by coordinate-measuring machine(CMM). However, the usage of CMM requires much time and cost. In order to overcome the difficulties, on-line measurement(OLM) system was applied for a tool wear measurement. This study shows a reliable technique for the reduction of machining error components by developing a system using a CCD camera and machine vision to be able to precisely measure the size of tool wear in flat end milling for CNC machining. The CCD camera and machine vision attached to a CNC machine can determine tool wear quickly and easily.
The Soundness Evaluation of Cam Shaft Moulding for the Commercial Vehicle Brake System
Cha, Yong-Hun ; Sung, Back-Sub ; Kim, Jae-Yeol ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 60~66
In this paper, the computer simulation analyzed the effective plastic strain and temperature behaviors. The quantitative analyses which proposed the effective mold design of S/CAM shaft was executed. The parameters of forging shape that affected on the optimize conditions that was calculated with simple equation were investigated. it is expected that the developed analysis model and design technique would greatly contribute to the drum brake optimal design considering effective plastic strain and temperature affected behaviors. This development could save more than 20% of production cost and reduced failure rate to more than 30%. By improving the life span of mold from 15,000 to 25,000, financial difficulty of company imposed on a mold manufacture could be overcome.
A Study on the Manufacturing Technology of a Folding Blind Rivet
Byun, Hong-Seok ; Kim, Young-Ho ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 67~73
In this study, the manufacturing technology of a folding blind rivet was developed through finite element analysis(FEA). Numerical simulations of the folding blind rivet used to join two components have been performed with the finite element method for the forging process design. To minimize the process and manufacture the folding blind rivet without defects, a variety of design rules were proposed. From the results of FEA applied process design rules, an optimal six-stage process was proposed. The finite element simulation results such as shape of the forged rivet, strain distribution and forging load were investigated for the usefulness of the forging process of the blind rivet. In addition, the experiments have been implemented and their results were compared to the analytic results.
An Experimental study on Prediction of Back-bead Geometry in Pipeline Using the GMA Welding Process
Kim, Ji-Sun ; Kim, Ill-Soo ; Na, Hyun-Ho ; Lee, Ji-Hye ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 74~80
In this study, a variety of welding experiments were carried out to optimize root-pass welding process using GMA process. Based on the experimental results, optimal welding conditions were selected after analyzing correlation between welding parameters and back-bead geometry. Then, effectiveness of empirical models developed was compared and analyzed, and optimized empirical models were finally developed for predicting back-bead by analyzing the main effect of each factor which affects back-bead geometry and their influence on interaction. Also, functions proper for expressing the surface of back-bead were selected using diverse quadratic functions, and back-bead geometry was visualized using empirical models developed and quadratic functions.
Heat Radiation of LED Light using eu Plating Engineering Plastic Heat Sink
Cho, Young-Tae ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 81~85
Recently, the electronic parts are to be thinner plate, smaller size, light weight material and CPU, HDD and DRAM in all the parts have been produced on the basis of the high speed and greater capacity. Also, conventional goods have replaced a LED (Light-Emitting Diode) in lighting products so; such industry devices need to have cooling. To maximize all the performance on the heat-radiated products, the area of heat-radiated parts is required to be cooled for keeping the life time extension and performance of product up. Existing cooling systems are using radiant heat plate of aluminum, brass by extrusion molding, heat pipe or hydro-cooling system for cooling. There is a limitation for bringing the light weight of product, cost reduction, molding of the cooling system. So it is proposed that an alternative way was made for bringing to the cooling system. EP (Engineering Plastic) of low-cost ABS (Acrylonitrile butadiene styrene Resin) and PC (Polycarbonate) was coated with brass and the coating made the radiated heat go up. The performance of radiant heat plate is the similar to the existing part. We have studied experimentally on the radiated heat plate for the light-weight, molding improvement and low-cost. From now on, we are going to develop the way to replace the exiting plate with exterior surface of product as a cooling system.
A Study on Basic Research Trends of Ultra-Precision Machining Technology in Korea
Park, Won-Kyoo ; Lee, Dae-Myung ; Hong, Won-Hwa ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 86~95
Ultra-precision machining technology is the essential core technology in today's micro-electronics and electro-optical industries. The needs for processing systems to manufacture products to nanometer(nm) accuracy and sub-nanometer resolutions are increased recently. By using ion beam, it is possible to fabricate ultra-precision and ultra-fine products with nm accuracy and sub-nm resolution. In this paper, the basic research trends of ultra precision machining technology in domestic are surveyed, and the ways to reach to the world-leading level of basic research capabilities in the field of ultra-precision machining technology in domestic is suggested.
A Study on the Development of Hydrostatic High Speed Spindle for Grinding Machine
Kim, Jeong-Suk ; Cho, Yong-Kwon ; Park, Jin-Hyo ; Moon, Hong-Man ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 96~100
The hydrostatic bearings have a relatively small run-out comparing to its shape error by fluid film effect in hydrostatic state as like pneumatic bearing and have a high stiffness, load capacity and damping characteristics. As there is no maintenance and semipermanent in these bearing type, it has been usually adopted as main spindle bearing for grinding machine. In this thesis, to develop hydrostatic bearing for high speed spindle, the cooler setting temperature, bearing clearance and nozzle pressure of belt-driven hydrostatic bearing are investigated. The bearing temperature is decreased, as the cooler setting temperature is lower, nozzle pressure is higher and bearing clearance is wider. The front temperature of bearing is nearly
higher than the rear one up to 13,000 rpm of spindle revolution. The thermal deflection of X-axis is
in range of 12,000 rpm-13,000 rpm. Therefore, it is conformed that the built-in motor hydrostatic bearing can be used to high speed spindle.
An Evaluation of Machining Characteristics in Micro-scale Milling Process by Finite Element Analysis and Machining Experiment
Ku, Min-Su ; Kim, Jeong-Suk ; Kim, Pyeoung-Ho ; Park, Jin-Hyo ; Kang, Ik-Soo ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 101~107
Analytical solution of micro-scale milling process is presented in order to suggest available machining conditions. The size effect should be considered to determine cutting characteristics in micro-scale cutting. The feed per tooth is the most dominant cutting parameter related to the size effect in micro-scale milling process. In order to determine the feed per tooth at which chips can be formed, the finite element method is used. The finite element method is employed by utilizing the Johnson-Cook (JC) model as a constitutive model of work material flow stress. Machining experiments are performed to validate the simulation results by using a micro-machining stage. The validation is conducted by observing cutting force signals from a cutting tool and the conditions of the machined surface of the workpiece.
EMI Mesh Development for the PDP using Electroforming
Kwon, H.H. ; Beom, M.W. ; Lim, S.Y. ; Hwang, C.S. ; Park, D.S. ; Lee, T.W. ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 108~113
There are a lot of PDP TV for a plasma discharge pulse voltage generated by the use of electromagnetic waves. EMI mesh film is near Infrared ray caused by malfunction of the remote control intended to prevent this phenomenon. In this study, the formation of fine pattern by making the mold is imprinted on the film sheet. EMI mesh film has been granted by filling in the conductive material region imprinted with electroforming in the manufacture of resistance. The fine patterns fabricated with electroforming facility thickness of homogenization process technology were established to optimize the working conditions.
A Study of Aspheric Mirror Optical Design to Improve Luminous Intensity Uniformity of LED Security Lights
Jung, In-Ho ; Yoon, Cheol-Yong ; Ye, In-Soo ; Hyun, Dong-Hoon ;
Journal of The Korean Society of Manufacturing Technology Engineers, volume 20, issue 1, 2011, Pages 114~119
There is a limit to technology of improving luminous intensity uniformity and glare, known as a weakness of existing LED lamp. Because of Using many LED, LED lamp not only waste energy but have bad effect on efficiency. Our goal is to develop security lights solution which is contented with suitable area in KS(Korean Industrial Standards) and to remove glare by combining asphere in optical system with different concept. To improve luminous intensity uniformity, a reflect mirror system was used after an aspheric optical system design for this study. We made a mirror and measured it after analysing luminance changes depend on aspheric shapes with simulation program to see if aspheric shapes effect luminance distribution. We made progress to find problems and improve them by comparing measured data and analysed data. This result of the study will contribute to industry of LED lighting through developing solution of emotional illumination of LED security lights by knowing the importance of reflectivity with this study and improving luminous intensity uniformity with solving the problem.