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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 10, Issue 6 - Dec 2011
Volume 10, Issue 5 - Oct 2011
Volume 10, Issue 4 - Aug 2011
Volume 10, Issue 3 - Jun 2011
Volume 10, Issue 2 - Apr 2011
Volume 10, Issue 1 - Feb 2011
Selecting the target year
Development of Micro Milling EDM and Analysis of Machined Characteristics
Kim, Sun-Ho ; Lim, Han-Seok ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 1~7
Micromachining is gaining popularity due to recent advancements in MEMS(Micro Electro Mechanical Systems). Using conventional micromachining, it is relatively difficult to produce moving components in the order of microns. Photolithography for silicon material has high accuracy machining, but it has low aspect ratio. X-ray lithography has ultra high accuracy machining, but it has expensive cost. Micro-EDM(electro discharge machining) has been gaining popularity as a new alternative method to fabricate micro-structures. In this study, Micro-EDM machine is developed available for fabricate micro-structures and two processes such as side cut EDM and milling EDM is proposed. Several sets of experiment results have been performed to study the characteristics of the machining process.
A Study on the Development of Limited Slip Differential on All Terrain Vehicle
Kim, Jun-An ; Jun, Jae-Uhk ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 8~15
ATV(All Terrain Vehicle) has been developed to be used for agricultural fields on unpaved roads but now it is mostly used to transport a short distance and play leisure sports at mountains. Recently, main concerns on the automobile industry is developing not only a car safe, high fuel efficient and friendly related with environment but also two-wheeled vehicles. In order to maintain high fuel efficiency and safety of two-wheeled vehicle, it is essential that ATV should be set up differential gear. But we worried for ATV which had been set up differential gear not to run on unpaved roads. Therefore, it is necessary to develop LSD(Limited Slip Differential) that maintains existing advantages of ATV and ensures ATV to travel safely on roads. Now LSD equipped cars have a complicated structure, so setting up on ATV is unsuitable. Therefore, in this study, we have developed simple, small and well operating LSD.
The Development of Shape Guided Automatic Deburring Machine for Mold Products
Hwang, Jong-Dae ; Kim, Jin-Seob ; Jung, Yoon-Gyo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 16~22
Recently, the deburring process which is last process of manufacture is one of the important process for complete product. The development of shape guided automatic deburring machine is essential because manual deburring process has very irregular quality and higher error rate as well as consider irregular shape radius. In order to develop of shape guided automatic deburring machine, in this study, we conducted 3D design, assembly, machine simulation and structural analysis using CATIA. Also, we conducted to make automatic deburring machine and conducted a performance test.
Plan Study of Improvement on Thermal Flow at Computer Main Frame
Cho, Jae-Ung ; Han, Moon-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 23~30
This study is to analyze the internal flow at the inside of computer case which is commonly used. The inner configuration are modelled and simulation analysis is done by ANSYS-CFX. Dead volume is happened according to the positioning of VGA and HDD. The advanced model is suggested by removing this volume and making the smooth cooling flow. This model is formed with the constraint conditions same as the existing model. As compared with the existing model, flow configuration is different and the average temperature becomes lower through flow analysis about the advanced model.
Characteristics of Surface Hardened Press Die Materials by
Laser Beam Irradiation
Yang, Se-Young ; Choi, Seong-Dae ; Choi, Myeong-Soo ; Jun, Jae-Mok ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 31~37
Recently, the technology of surface treatment is being more important which affects the material cost reduction and substitution to the expensive material. The material used for the mechanical processing should have not only high intensity, but also strength toughness, wear resistance and corrosion resistance. In order to increase the durability and have better quality of the parts using such kind of tooling material, various kinds of research of the surface hardening through many kinds of heat resources is being done and practically applied. In this study, the characteristics of hardening surface zone for high strength of the press die material through laser beam irradiation are researched. In this study, it is experimentally observed by the status of the surface morphology, tensile strength, the hardness distribution of the base metal and wear condition by the surface hardness pattern by the laser beam based on the process parameters of
laser by using SM45C and STD11 used for press tool. Through this research, the characteristics of surface hardened zone for high strength of the thin metal by laser beam irradiation is done.
Impact Behavior Simulation of Anisotropic Materials
Ahn, Kook-Chan ; Jung, Dae-Sik ; Kim, Bong-Hwan ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 38~46
A study was performed to investigate the dynamic behaviors of fiber-reinforced composite materials subjected to transversely low-velocity impact. For this purpose, the simulation of modified beam finite element based on higher order beam theory for two(isotropic and anisotropic) materials is carried out according to the changes of material property, stacking sequence, geometric dimension and impact velocity of steel ball, etc. Main composite materials for simulation are composed of
stacking sequences. The effectiveness of this simulation for qualitative and quantitative evaluations in composite materials subjected to foreign object impact was established.
SWCNT/Nafion Composite Development for Improvement of Mechanical Properties of IPMC
Kwon, Hui-June ; Lee, Heon-Sang ; Lee, Jung-Hwa ; Jun, Chan-Bong ; Kang, Jung-Ho ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 47~53
From recent research, it has revealed that Electroacitve polymer(EAP) has a physical limitation. Carbon nanotube(CNT) is known as the promising material which has excellent electro-mechanical characteristics and is mostly defect-free. It is expected that a successful synthesis of CNT and Nafion known as a primary material for IPMC would make a great improvement on its electro-mechanic feature. In this paper, we suggest the method of synthesis of CNT with Nafion which improves electro-mechanical characteristic. Using mechanical dispersion with Nafion and Isopropyl Alcohol(IPA), we disperse Single-walled carbon nanotubes(SWCNT). For a uniformly layer of CNT, we used a spray gun on a hot plate by a simplified method. In the result, we fabricated a disperse SWCNT/Nafion composite uniformly.
A Study on the Improvement of Noise Performance by Optimizing Machining Process Parameters on Ball Screw
Xu, Zhezhu ; Choi, Jong-Hun ; Kim, Hyun-Ku ; Shin, Joong-Ho ; Lyu, Sung-Ki ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 54~61
Ball screw systems are largely used in industry for motion control and motor applications. But the problem of noise, which really perplexes us, is highly correlated with the quality in ball screw systems all the way. In this paper, machining process parameters were evaluated in respects of technique, business, produce and quality to verify which impact influences the noise most. In order to adjust and compare, two comparison groups were set with the present parameters bench mark. Different ball screws were produced as specimens for the noise tests. Through comparing the noise performance of different parameters in the machining process respectively, a group of optimized machining process parameters were obtained. Another noise test was proceeded to know how noise performance was improved by optimizing the machining process parameters. At last, surface roughness tests have been done to know how surface roughness improved by optimization. The improvement of surface roughness is the main factor influences the noise performances.
Study on Improvement of Thermal Performance and Durability by Disk with Holes
Han, Moon-Sik ; Cho, Jae-Ung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 62~66
In this study, the thermal performance of disk can be compared with disk and disk with holes through numerical analysis. The capacity of thermal emission on general disk becomes more than on disk with holes at the distribution of temperature at first and the magnitude of equivalent stress on general disk becomes less than on disk with holes at the distribution of stress. The capacity of thermal emission or the magnitude of thermal deformation on disk with holes becomes less than that on general disk 30 minutes later. The disk with holes is worn less and more durable than general disk. The performance of cooling and braking force at disk and pad can be improved by installing the disk with holes.
A Study on the Carburizing Treatment of SCM415 Steel Spur Gear
Ahn, Min-Ju ; Ahn, In-Hyo ; Lyu, Sung-Ki ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 67~72
The main objective of this paper is obtaining the optimal carburizing hours which impacts geometric tolerances, OPD(Over Pin Diameter), runout, hardness and fatigure strength of SCM415 spur gear. In order to observe the deformation of the gear, the circularity, squareness, OPD(Over Pin Diameter) and runout were measured at 3hour, 4hour and 5hour respectively. As the result, the 3hour situation is the best, which very similar with the 4hour one. Afterwards, with the purpose of getting the result of gear hardness, the surface hardness, maximum hardness and interior hardness were measured. The result is 5h situation is the best, and it's similar with 4hour one. At last, the fatigue tests have been done which receive the result that the 4h situation showed 9-12% fatigue strength improvement compared with the 3h and 5h ones. To sum up the results, the 4hour situation shows the best performance in accuracy, hardness and fatigue strength.
A Study on the Wearing Behavior of Diamond Tool used to Machining of Ceramics
Park, Sang-Hee ; Kim, Kwang-Min ; Choi, Seong-Dae ; Hong, Young-Bae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 73~79
In this study, coring with diamond core drill on the sintered
ceramic plate were carried out with different coring conditions such as various cutting speed and feed rate to evaluate their effectiveness on the wearing behavior of diamond tool and coring quality. The wearing rate of diamond core drill were getting better with increasing cutting speed and feed rate but the quality of cored hole were getting worse as increasing cutting speed and feed rate.
Tapping Machining Characteristics of Titanium Hard-to-Cut Material
Lee, Ho-Chang ; Kim, Hae-Ji ; Kim, Nam-Kyung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 80~86
This study compared and analyzed manual tapping and automatic tapping regarding tapping process characteristics of titanium hard-to-cut-material. Tapping process characteristics of titanium hard-to-cut-material are evaluated as the quality of a screw, wear of a tap, economic analysis, and cycle time etc. The type of screw threads after manual tapping is formed as an irregular type of screw threads, and perfect screw threads are created after automatic tapping. In addition, the chip type after manual tapping process is formed as the discontinuous chip due to work hardening, and the powder type of chip after automatic tapping process is created. In terms of cycle time, an automatic tapping process is shortened by 70% compared to manual tapping process. Insert tip wear of an automatic tapping shown in the process of 5-hole tapping is not found, but hand tap wear for finish cutting is most severe.
Multi-Body Dynamic Modeling for a Flexible Rotor and Vibration Control using a Novel Phase Adjusting Technique
Jung, Hoon-Hyung ; Jo, Hyeon-Min ; Kim, Chae-Sil ; Cho, Soo-Yong ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 10, issue 1, 2011, Pages 87~92
This article proposes a new technique of the dynamic model using multi-body dynamic analysis tool for a flexible main spindle rotor system with a novel phase adjusting control technique for the purpose of an active control of rotor vibration. The dynamic model is used as a plant model. Also in order to make control system, a component parameters and phase controller is composed and simulated by SIMULINK. The vibration is reduced to 50% Therefore the ADAMS dynamic model for the flexible main spindle rotor and the phase adjusting control techniques may be effective for the suppressing the vibration and helpful for the future active control for rotor vibration.