Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Manufacturing Process Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Manufacturing Process Engineers
Editor in Chief :
Volume & Issues
Volume 12, Issue 6 - Dec 2013
Volume 12, Issue 5 - Oct 2013
Volume 12, Issue 4 - Aug 2013
Volume 12, Issue 3 - Jun 2013
Volume 12, Issue 2 - Apr 2013
Volume 12, Issue 1 - Feb 2013
Selecting the target year
National Infrastructure Construction Plan for Parts & Materials of Medical Device
Kim, Sang-Hee ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 1~2
Predicted the behavior of the femur according to the loading condition using FEM
Song, Seung-Youp ; Choi, Seong Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 3~9
Falling related injuries are categorized as the most serious and common medical problems experienced by the elderly. Hip joint fracture, one of the most serious consequences of falling in the elderly, occurs in only about 1% of falling. In this study, according to the loading conditions, the analysis is the behavior of the femur. The CT images using the commercial program "Mimics" the bones of three-dimensional CAD data generated, and we will analyze the results of finite element analysis. The boundary conditions on the basis of existing research has been simplified. In this paper, the whole femur was assumed to be isotropic linear elastic material. Predicted the behavior of the femur according to the loading condition, it can be help the development of high-precision artificial bones and joints can be treated with surgery and will be able to perform efficiently.
Characteristic of neuroblastoma cell (SH-SY5Y) culture on the crystalline diamond film
Nam, Hyo-Geun ; Oh, Hong-Gi ; Kim, Dae-Hoon ; Kim, Min-Hye ; Park, Hye-Bin ; Jhee, Kwang-Hwan ; Song, Kwang-Soup ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 10~15
In order to fabricate high sensitive and stable biosensors, we require the material with superior biocompatibility and physical-chemical stability. Many kinds of biomaterials have been evaluated to apply for bioindustry. Recently, carbon based diamond thin films have been focal pointed as bio-applications and their possibility has been evaluated. Diamond thin film has many advantages for electrochemical and biological applications, such as wide potential window (3.0-3.5V), low background current and chemical-physical stability. In this work, we have cultured neuroblastoma cell (SH-SY5Y) on the crystalline diamond films. We use MTT assay to evaluate the characteristic of cell culture on the substrates. As a result, neuroblastoma cell was cultured on the crystalline diamond film as similar as cell culture dish.
DC link voltage control method in the sinusoidal current drive system for dental hand-piece PMSM
Jeon, Geum-Sang ; Park, Jae-Seung ; Park, Sang-Uk ; Kim, Sang-Hee ; Ahn, Hee-Wook ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 16~21
This paper presents a DC link voltage control method to reduce the ripple current and the switching loss in the sinusoidal current drive system for the wide-speed range PMSM. The DC link voltage of the three phase inverter in the sinusoidal current drive system is designed by the back-EMF voltage at maximum speed of the PMSM. In general, the drive systems have used the constant DC link voltage without reference to the motor speed. The current ripple causes hysteresis loss and makes noise. In addition, the switching loss on the inverter increases in proportion to the rise in the DC link voltage. In this paper, we propose the variable DC link voltage control method to reduce the current ripple in the PMSM drive system. We show reduction effect of the current repple and the switching loss through simulation results.
Prediction of Pumping Efficacy of Left Ventricular Assist Device according to the Severity of Heart Failure: Simulation Study
Kim, Eun-Hye ; Lim, Ki Moo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 22~28
It is important to begin left ventricular assist device (LVAD) treatment at appropriate time for heart failure patients who expect cardiac recovery after the therapy. In order to predict the optimal timing of LVAD implantation, we predicted pumping efficacy of LVAD according to the severity of heart failure theoretically. We used LVAD-implanted cardiovascular system model which consist of 8 Windkessel compartments for the simulation study. The time-varying compliance theory was used to simulate ventricular pumping function in the model. The ventricular systolic dysfunction was implemented by increasing the end-systolic ventricular compliance. Using the mathematical model, we predicted cardiac responses such as left ventricular peak pressure, cardiac output, ejection fraction, and stroke work according to the severity of ventricular systolic dysfunction under the treatments of continuous and pulsatile LVAD. Left ventricular peak pressure, which indicates the ventricular loading condition, decreased maximally at the 1st level heart-failure under pulsatile LVAD therapy and 2nd level heart-failure under continuous LVAD therapy. We conclude that optimal timing for pulsatile LVAD treatment is 1st level heart-failure and for continuous LVAD treatment is 2nd level heart-failure when considering LVAD treatment as "bridge to recovery".
Characterization of partially functionalized diamond for detecting single mismatched DNA
Yang, Jung-Hoon ; Song, Kwang-Soup ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 29~33
Here we report a partially aminated micropattern via direct functionalization and examine eleven different solution-phase probe DNAs hybridizing with the same target DNA on both hydrogen and oxygen terminated diamond. The hybridization intensities determined by epifluorescence microscopy were compared and are influenced strongly by the negatively charged surface and mismatched position of its sequence with immobilized probe DNA.
A Study on the magnetization of metal orthopedic prosthesis in magnetic resonance imaging
Kim, Hyeong-Gyun ; Song, Duk-Chung ; Choi, Seong-Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 34~39
For orthopedic artificial metal stainless steel, the magnetization of the magnetic field due to the presence of the titanium was to observe the change. Magnetic field meter (Tesla meters) a certain distance (ISO Centre) 1.5 Tesla magnetic field, the magnetization in the center with the passage of time were measured. Therefore, these artificial metal clip shape and magnetization of the sample size to produce a ferromagnetic material for comparison is the experimental dependence. For comparison of the experimental dependence of the magnetization, thereby producing a test piece size such as shaping prosthetic metal Clip is a ferromagnetic material. The experimental results, the metal orthopedic implants, there was no change in the magnetization indicated by ferromagnetic material in its natural state. However, in a magnetic field of 1.5T (Tesla), showed a sensitivity that is magnetized rapidly compared to the ferromagnetic material. In conclusion, high in the order of Clip, Stainless, of Titanium, the degree of dependence of the magnetization intensity of magnetization was the order Stainless, Titanium, of Clip in a magnetic field.
A Study on the Cutting Criteria and Cutting Characteristics Considering the Tool Slenderness Ratio for 7075 Aluminum Alloy
Park, H.M. ; Park, H.C. ; Son, H.J. ; Cho, Y.T. ; Jung, Y.G. ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 40~46
When impeller machining needs to be machined over a length in order to avoid interference with neighboring surfaces between material and tool, there are no databases about cutting condition according to tool slenderness ratio. So selection and machining of cutting condition depends on expert's experience. Therefore, the purpose of this paper is deciding cutting condition in roughing and finishing process of impeller according to slenderness ratio of AL7075's end-mill that is the most commonly used for impeller. We have tested for about relation between Slenderness ration and fluctuation width of the cutting force, surface roughness and depth of cut ratio to observe cutting characteristics according to slenderness ratio. The experiments of cutting characteristics and processing criteria are compared with AL5052 which is existing information.
Finite Element Simulation on Prediction of an Asymmetric Hot Forging Die Life Based on Wear
Choi, Chang-Hyok ; Jung, Kyung-Bin ; Kim, Yohng-Jo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 47~54
The main cause of die failure in hot forging is wear. Die wear directly generates the gradual loss of part tolerances, thereby causing deterioration in the dimensional accuracy of a forged part. It is very important to estimate forging cycles, called as die life, at which the die should be repaired or replaced. In this study, in order to estimate the hot forging die life, the finite element simulation of wear on an asymmetric part like a ball joint socket used in vehicle was carried out based on Archard's model. Finite element simulation results were compared with wear amounts of a used die that were measured using a contact stylus profilometer. The simulation results were in relatively good agreement with measurements obtained from the virtual die which was used by 7,000 forging cycles in a forging industry. Consequently, the die life in the hot forging of the ball joint socket was estimated by 10,500 forging cycles on the finisher die.
Credibility Evaluation of Versatile Weight Lightening Plywood Using Piercing
Kim, Jin-Woo ; Kim, Hye-Soo ; Kim, Chang-Uk ; Song, Jung-Il ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 55~60
In this study, mechanical properties of versatile light weight plywood(manufacturing using piercing) are studied. A credibility evaluation was carried out for different perforation patterns including octagonal shape, rectangular shape and circular shape. A static structural analysis is conducted to find the stresses produced. Circular perforations are found to have better strength to weight ratio. Results of each type of perforation are discusses and compared.
Heat Sink of LED Lights Using Engineering Plastics
Cho, Young-Tae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 61~68
As an advance study for the development of a heat sink for special purpose high power illumination, an investigation was made to find feasibility for the application of copper plated EP to a heat sink of small LED light of less than 10W installed in commercial product. In this study, the plated heat sink with EP copper was fabricated for the conventional LED light. It was used actually for finding heat radiation property and effectiveness of the heat sink accompanied with measurement of luminous intensity. The heat is radiated by transfer and dissipation only through the copper plated surface due to extremely low heat conductivity of EP in case of EP heat sink; however the total area of the plate plays the function of heat transfer as well as heat radiation in case of the aluminum heat sink. It seems that the volume difference of heat radiating material is so big that the temperature
is 9.0~12.3% higher in 3W and 42.7~54.0% higher in case of 6W volume difference of heat radiating material is so big that the temperature
is 9.0~12.3% higher in 3W and 42.7~54.0% higher in case of 6W even though heat transfer rate of copper is approximately 1.9 times higher than that of aluminum. It was thought that this is useful to utilize for heat sink for low power LED light with the low heating rate. Also, the illumination could be greatly influenced by the surrounding temperature of the place where it is installed. Therefore, it seems that the illumination installation environment must be taken into consideration when selecting illumination. Further study was expected on order to aims at development of an exterior surface itself made into heat radiation plate by application of this technology in future.
Durability Analysis due to the Shape Change of Universal Joint
Han, Moonsik ; Cho, Jaeung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 69~74
According to the axial torsion applied at power transmission and the vibration from the roughness of road surface, this paper analyzes the stresses on two kinds of universal joint model. As stress and deformation at model 2 becomes smaller than model 1 on structural analysis, model 2 is more stabilized than model 1. The natural frequencies at model 1 and 2 are 7,040 and 9,540 Hz respectively. As the natural frequency range of model 2 becomes higher than model 1, model 2 becomes safer than model 1. Critical frequencies at these models are calculated through harmonic response analyses. On critical frequencies at model 1 and 2, the stress at model 2 becomes lower than 2 times as much as model 1 and the deformation at model 2 becomes lower than 4 times as much as model 1. Model 2 on durability is thought to become better than model 1. This study result is applied with the design of safe universal joint and it can be useful to improve the durability by predicting prevention against the deformation due to its vibration.
A Study on the ELID Grinding Properties of Single Crystal Sapphire Wafer using Ultrasonic Table
Hwang, JinHa ; Kwak, Tae-Soo ; Lee, Deug-Woo ; Jung, Myung-Won ; Lee, Sang-Min ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 75~80
Single crystal sapphire being used in high technology industry is a brittle material with a high hardness and excellent physical properties. ELID(Electrolytic In-Process Dressing) grinding technology was applied to material removal machining process of single crystal sapphire wafer. Ultrasonic vibration which added to material using ultrasonic table was adopted to efficient ELID grinding of sapphire materials. The evaluation of the ground surface of single crystal sapphire wafer was carried out by means of surface measuring by using AFM(Atomic Force Microscope), surface roughness tester and optical microscope device. As the results of experiment, it was shown that more efficient grinding was conducted when using ultrasonic table. In case of using #170 grinding wheel, surface roughness of ELID ground specimen in using ultrasonic table was superior to ELID ground specimen without ultrasonic table. However, In case of using #2000 grinding wheel, surface roughness of ELID ground specimen in using ultrasonic table was inferior to ELID ground specimen without ultrasonic table.
Effects of 2-dimensional vibration on the surface roughness in micro milling
Kim, Gi Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 81~86
For a 2-dimensional(2D) vibration milling, an excitation work-table was developed using two piezoelectric materials orthogonally arranged, where the trochoidal trajectory of a milling tool is combined with 2 dimensional elliptical vibration of a work-table. Applying 3kHz excitation frequency and 7~8mm amplitude of vibration to micro milling process with brass and nickel materials, the roughness in both bottom and side surface is much more improved compared to the surface by conventional milling process, which is attributed to decreased frictional force, increased cutting speed, and rubbing effect of a 2 dimensional vibration.
Predict of Surface Roughness Using Multi-regression Analysisin Turning of Plastic Mold Steel
Bae, Myung-Il ; Rhie, Yi-Seon ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 87~92
In this study, we carried out the turning of plastic mold steel(STAVAX) with whisker reinforced ceramic tool(WA1) and analyzed ANOVA(Analysis of Variance) test. Multi-regression analysis was performed to find influential factors to surface roughness and to derive regression equation. Results are follows: From ANOVA test and confidence interval analysis of surface roughness, We found that influential factors to surface roughness was feed rate, cutting speed and depth of cut in order. From multi-regression analysis, we derived regression equation of STAVAX. it's coefficient of determination(
) was 0.945 and It means that regression equation is significant. From experimental verification, we confirmed that surface roughness was predictable by regression equation. Compared with former research, we confirmed that increase of feed rate is the main cause of the growing of surface roughness and cutting force.
Fatigue Behavior Analysis of Welded Rod/Knuckle Assembly for Hydraulic Cylinder
Rhee, Hwanwoo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 93~99
Parts and structures such as piston rod and knuckle joint for the use of hydraulic cylinder are often welded together in some fashion, usually due to cost and process effectiveness. Welding strongly affects the material by the process of heating and subsequent cooling as well as by the fusion process with additional filler material. Furthermore, a weld is usually far from being perfect, containing inclusions, pores, cavities, undercuts etc. As a consequence, fatigue failures appear in welded structures mostly at the welds rather than in the base metal, even if the latter contains notches. For this reason, fatigue analyses are of high practical interest for all welded structures under the action of cyclic loads. This paper describes the influence of welding parameters, material combinations and heat treatment on the fatigue behavior of welded cylinder rod. In addition, statistical characterization of stress-life response in weldment of hydraulic cylinder rod are presented.
Study on Analysis of Heat Dissipation due to Shape of Motorcycle Disc Brake
Cho, Jae-Ung ; Han, Moon-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 100~107
This study aims to improve the heat performance of motor cycle disk due to the number of holes by analyzing 6 kinds of disk models. This disk performance depends on the efficiency at emitting the heat. To raise the efficiency of heat emission, holes with circle or another configuration are made on disks to emit heat fast. The distribution of temperature, heat flux, deformation and stress are analyzed. As the number of holes on disk increases, the performance of heat emission is improved. Equivalent stress is decreased and durability is improved as the number of holes on disk increases. Though the number of holes on disk is increased, the performances of heat emission and durability do not become better. The optimal model can be found by comparing models each other through this analysis result. Through this study result, the configuration of motor cycle disk is designed with optimal heat emission and durability by comparing models.
A Study on Edge Bridge Minimization of Fine Blanking Process
Kim, Gi-Tea ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 108~113
Industrialization and modernization of the beginning of the IT industry is growing very fast. Since telecommunications industry was developed rapidly, technologies about miniaturization and high-precision of parts have been actively developed to lead information revolution. generally, the entire shear surface of the product applying fine blanking technology must be very precise. Fine blanking is used to save cost by avoiding post-processing of the product. When using press blanking, it spends a lot of money on the production by using many post-processing. Fine blanking typically used in 0.5~18 mm thick steel plate. Because a lot of post-processing cost can be used to process, except for fine blanking. In order to develop components "CHANCE CONTENTS" in the fine blanking process, the purpose of this study is to minimize the edge of the bridge, secured 95% of the material thickness of the shear surface using the 1.6 mm thickness of the material SPCC. Blanking process by introducing after changing thickness through forging process, due to change in vee-rring force and counter force, the experimental amount of depressions and flatness and the shear surface were analyzed.
Optimization of Gate Location for Melt Flow Balancing in Injection Mold Cavity By Using Recursive Design Area Reduction Method
Park, Jong-Cheon ; Lee, Gyu-Seok ; Choi, Seong-Il ; Kang, Jin-Hyun ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 114~122
This study introduces an optimization methodology for the determination of gate location that ensures the melt flow balance within a part cavity of injection mold. A new sequential direct-search scheme based on the recursive reduction of the designer-specified gate design area is developed, and it is integrated with a commercial flow simulation tool for optimization. To quantify the level of melt flow balance, we employ the maximum difference among the fill times for the melt fronts to reach the boundary elements of part cavity as objective function. The proposed methodology is successfully applied in the case study of melt flow balancing in molding of a bar code scanner model. The result shows that the melt flow balance at the optimized gate positions is significantly improved from that for the initial gate position.
Characterization of Fracture Toughness and Wear Behavior for Plasma Ceramic Coated Materials
Ha, Sun-Ho ; Lee, Dong-Woo ; Rehman, Atta Ur ; Wasy, Abdul ; Song, Jung-Il ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 12, issue 4, 2013, Pages 123~130
Zirconia is well known in industrial applications for its mechanical characteristics. DLC (diamond-like carbon) have high elastic modulus, high electric resistivity, high dielectric constant, high wear resistance, low friction coefficient, bio compatibility, chemically inert and thermally stable. Because of all these physical and chemical properties these types of coatings have become key procedure for thin coating. Friction coefficient of DLC films is already evaluated and the current work is a further advancement by calculating the fracture toughness and wear resistance of these coatings. In the present study DLC thin film coatings are developed on
alloy surface using Plasma Enhanced Chemical Vapor Deposition (PECVD) method. Vicker hardness test is employed and it was concluded that, DLC coatings increase the Vickers hardness of ceramics.