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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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 9, Issue 6 - Dec 2010
Volume 9, Issue 5 - Oct 2010
Volume 9, Issue 4 - Aug 2010
Volume 9, Issue 3 - Jun 2010
Volume 9, Issue 2 - Apr 2010
Volume 9, Issue 1 - Feb 2010
Selecting the target year
A study on visualization about the flow mode of ER fluid using the DIME
Lee, Yuk-Hyung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 1~7
A new flow mode of ER fluid available for controlling the damping force by using DME(Discrete Multi-Electrode) is presented in this study. Various characteristics about the flow of ER fluid through the experiment of ER cluster behavior visualization can be assumed. The pressure in electrode length and voltage division mode is measured. An actuator with a damping effect through DME ER damper will be developed. This damper controls the damping force by using the displacement and velocity of the plant which consists of the various electrode length and voltage modes without a controller in the real system.
Surface Machining of Shaft by Descale Machine Design
Kim, Woo-King ; Ko, Jin-Bin ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 8~13
The shaft surface machining is a popular machine for studying descale machine design and process in automobile industry. In this study, the descale design machine of cutting shaft surface was conducted for the detection of a tool failure in surface process. Induction harden surface is used as analyzing function to detect a sudden change in cutting process level. A preliminary stepped workpiece which had a hard condition was cut by the surface tool and a tool process obtained cutting force machine. At machine failure, the results were suddenly increased and the detailed surfaces were extremely obtained.
Analysis of gas flow and thermal deformation in a muffler
Cho, Jae-Ung ; Han, Moon-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 14~18
Car muffler has the role to form the exhaust gas from high temperature- pressure to lower level and reduce the generated noise. Because of this role, its durability decrease as deformation by heat is occurred. This study is to analyze the flow of exhaust gas inside muffler and its coupled thermal deformation with 3-D modeling and ANSYS. There is the fastest flow at the exit of muffler with the maximum velocity of 54 m/s. And the maximum deformation or equivalent stress is shown at this model respectively as 0.00435 mm or 3414.4 MPa by the influence of heat and pressure at part of intersection with inlet and body of muffler.
The Noise Reduction of Industrial Blower Using Buff Shapes in Silencer
Kim, Chang-Ho ; Son, In-Soo ; Ahn, Tae-Soo ; No, Tae-Woo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 19~24
The noise of an running industrial fan or blower depends on the type of a fan, the machining accuracy and assembled conditions of each element, and buffs. Many studies have been carried out to reduce the noise through silencer in blower. In this study, 3 types of buffs which have different hole are employed in pipe of blower to study the influence the number and arrangement of buffs on the noise reduction at inlet and outlet in pipe. Commercial engineering software ANSYS was employed to analyze the characteristics and reduction ratio of pressure. Experimental results shows that optimal one can reduce the reduction ratio of noise as much as 16 percents in the laboratory. Good agreement was found between the analysed ratio of noise reduction and those obtained from the experiments.
Evaluation of Fretting Fatigue Behavior of Aluminum Alloy(A17050-T7451) Under Cyclic Bending Load
Kim, Jong-Sung ; Yoon, Myung-Jin ; Choi, Sung-Jong ; Cho, Hyun-Deog ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 25~34
Fretting damage reduces fatigue life of the material due to low amplitude cyclic sliding and changes in the contact surfaces of strongly connected machine and structures such as bolt, key, fixed rivet and connected shaft, which have relative slip of repeatedly very low frequency amplitude. In this study, the fretting fatigue behavior of 7050-T7451 aluminum alloys used mainly in aircraft and automobile industry were evaluated. The plain fatigue test and fretting fatigue test under cyclic bending load carried out commercial bending fatigue tester and specially devised equipments to cause fretting damage. From these experimental work, the following results obtained: (1) The plain fatigue limit for stress ratio R=-l was about 151MPa. (2) In case of fretting fatigue, fatigue limit for stress ratio R=-l about 72MPa, the fatigue limit for R=0 about 81MPa, and the fatigue limit for R=0.3 about 93MPa. (3) The fatigue limit reduction rates by the fretting damage were about 52%(R=-1), 46%(R=0) and 38%(R=0.3) respectively. (4) The fatigue limit reduction rate decreased with stress ratio increase. In fretting bending test, as stress ratio increased, occurrence of initial oblique crack by fretting decreased or phased out, so that fracture surfaces were formed by plain fatigue crack occurrence, and such tendency was notable as stress amplitude increased. (5) Tire tracks and rubbed scars were observed in the fracture surface and contacted surface.
Creative Design of Large-Angle Pin Type Load Cell for the Overload Limiter of a Movable Crane
Han, Dong-Seop ; Ha, Jeong-Min ; Han, Geun-Jo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 35~41
An overload limiter is used to prevent its overturning accident during an operation of a movable crane. Recently the indirect measuring method, which measures hoisting load and overturning moment of overload limiter, demands instead of the existing method, which measures only hoisting load. The indirectly measuring method is how to conduct the hoisting load and overturning moment as measuring the load of hydraulic cylinder for a luffing driving of boom. So we need to develop the multi-angular pin type load cell with the measuring angle of
degree instead of the existing load cell with the measuring angle of
degree. In this study the finite element analysis is conducted to evaluate the effect of the aspect ratio of measuring cross section on the measuring limit of the load cell to develop the many-angular pin type load cell. For this investigation, the aspect ratio of measuring cross section and load applying angle were adopted as design parameters and the stresses of measuring part were evaluated for each parameter.
Thermal Stress Analysis on Exhaust System of Car
Cho, Jae-Ung ; Han, Moon-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 42~48
Exhaust system of car is studied by thermal analysis. Temperature is uniformly distributed from
on exhaust system due to heat transfer. The largest deformation of 2.6919mm is shown at the left end of muffler. The inner face combined with exhaust manifold is applied by the largest thermal equivalent stress of 914.61MPa. After the elapsed time of 360 second, the end of muffler is shown to have the largest deformation of 2.5538mm and the bolt combined with this muffler is applied by the largest equivalent stress of 887.79MPa. By reinforcing material at the end of muffler or fastened bolt shown with highest thermal deformation or stress, the durability at this system can be improved.
A Study on Structural Analysis of Integrated Machining Center
Park, Seong-Jin ; Lee, Choon-Man ; Kim, Woong ; Byun, Sam-Soo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 49~54
An integrated machining center is developed for high precision and productivity manufacturing. The developed machine is composed of the high precision spindle using ball bearings, the high stiffness bed and the three axis CNC controller with the high resolution AC servo motor. In this paper, structural and modal analysis for the developed machine are carried out to check the design criteria of machine. The analysis is carried out by FEM simulation with using the commercial software, CATIA V5, ANSYS and ARMD. The simulation model of machine is made by shell and solid finite elements. This study also presents the measurement system on the modal analysis of an integrated machining center. The weak part of the machine is found by the analytical evaluation. The results provide with the structural modification data for good dynamic behaviors. And the safety of machine is confirmed by the modal analysis of modified machine design. As this study results can be trustworthy with the analysis of ANSYS and CATIA, integrated machining center can be successfully developed.
Flow Analysis on the Outside of Automotive Body
Cho, Jae-Ung ; Han, Moon-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 55~60
The air resistance about automotive body is studied by the flow analysis in this study. Maximum air flow velocity is shown with 28 to 30 m/s on the upper roof of automotive body. The air flow becomes most regular at automotive body model 3 but the model of 2 or 3 becomes irregular in comparison with the model 1. The maximum air resistance pressure is shown with 413 to 420 Pa at the front bumper of automotive body. The flow velocity at inlet or middle plane of automotive body is shown as the contour same with the model of 1, 2, or 3. But the velocity at outlet plane at model 1 is shown as the contour different with the model of 2 or 3.
Development on integrated Pay Off Reel for Varied Diameter of Coil Inner
Park, Jeong-Ho ; Park, Hyoun-Jin ; Lee, Dae-Hee ; Kim, Soon-Kyoung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 61~66
Pay off reel is the device to release in the form of coil. Every time the device becomes a hassle to exchange, each diameter of two forms has been applied to the coil reel. There is the change of reel diameter of the sleeve portion to be the part of segment geometry. This unit is conducting on 3-dimensional modeling design. The basic strength and deformation of the device could be checked in advance by the basis of 3-d modeling data to perform simulations. The production of each part can be completed and assembled. Conducted for the final product which is tested and measured, all items are satisfied within the limits of targets. Due to the development of this device, the efficiency on operations can be increased and the production time becomes shortened.
Development and Evaluation of 1 Layer Polar Motion Control System for Solar Tracker
Kim, Sun-Ho ; Kim, Byung-Cheol ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 67~73
Finding sufficient supplies of clean energy for future is one of the society's most important challenges according to technologies. Alternative renewable energy source such as sun energy can be substituted for exceeding human energy need. The main factor affect to solar performance is a collective intensity. To enhance intensity, suitable equipment is a solar tracker. This paper presents design and evaluation of 1 layer polar motion control system for solar tracker suitable for building integrated system. To evaluation of tracking accuracy and adaptability, solar tracker with 64 links is implemented. In experimental results, the accuracy of tracking has under
and the thickness has under 140mm.
A Study on the Edge Construction of CMM Data Using a Method of Mean Curvature Block
Chang, Byoung-Chun ; Kim, Dae-Il ; Oh, Seok-Hyung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 74~80
The purpose of reverse engineering design using 3D measurement data is an accurate reconstruction of real body. In oder to accomplish this object, it is important that creating exact extracting edges should be studying out first of all. This study used edge-based method to find out edge point from the measuring point data. The characteristics are analysed using the mean curvature block method on the fitting NURBS curve and defined edges through block removal condition. The results showed that only using the NURBS curve of maximum curvature analysis to define correct edge of real geometry is limited, but this segmentation approach provides simplified necessary condition for edge classification, and an effectiveness to classify a straight line, curves and fillets etc.
A Study on the High Speed Characteristics of Plastic Mould Steel using Ball End Mill AlTiN Coated Layers
Lee, Seung-Chul ; Cho, Gyu-Jin ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 81~86
This paper investigated into process characteristics of AlTiN coated layers for machining to the direction of upper and lower in plastic mold material (KP-4) with the cemented carbide ball endmill with the diameter of 8mm coated AlTiN layers (1-4) step by step using machining center. The material used in experiments was KP-4 that was machined by three types of inclined angles;
As estimated mechanical properties of AlTiN coated layers, it was shown the most result in the condition of three layered coating that the coating that the coating depth, the hardness of the coated layer and the surface roughness of the coated layer were
, Hv 3027.3 and
, respectively. The cutting component was better at the condition of upper direction than that of lower direction in all experimental conditions and indicated to be less which the bigger angle of the material was increased the effective diameter of the tool.
Deformation analysis of Tool and Tool holder for Micromachining by FEM
Min, Kyung-Tak ; Jang, Ho-Su ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 87~92
Micromachining technology using a ultra-precision micromachining system is widely applied in the fields of optics, biotechnology and analytical chemistry, etc. specially in microfabrication of fresnel lens, light guide panels of TFT-LED and PDP ribs with micro-patterns, machining errors have an effect on the performance of those products. The deflection of tool and tool holder is known to be one of the very important factors that is due to machining errors in micromachining. The deflections of diamond tool and tool holder used in micro-grooving are analysed by FEM. We analysed by FEM. With an linearity valuation of FEM, deflection of tool and tool holder is calculated by using the data of cutting force which is acquired from micro-V groove machining experiments in micromachining system.
A Study on the Pulling Force Characteristic of the Reverse Screw for the Metal Fastening Method
Kim, Tae-Hyung ; Lee, Seong-Wook ; Han, Geun-Jo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 93~98
The metal fastening method is the new technology to repair cracks in the casting material using specially designed reverse screws. In this study, we conduct the finite element analysis to analyze the pulling force characteristic of a reverse screw, the core component of the metal fastening method, with respect to the change of the applying torque, frictional coefficient and front screw angle. The simplified analysis model with single screw pitch is proposed for convergency of the non-linear contact analysis. As a results, the pulling force of a reverse screw increase in proportion to the applying torque but exponentially decrease according to frictional coefficient. And also we can find the optimum front screw angle with the largest pulling force is
A study on properties of sector gear for seat recliner
Kim, Chang-Ho ; Kang, Soo-Ho ; Lee, Kwan-Young ; Nam, Ki-Woo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 99~105
This study was performed to solve the breaking problem in the fine blanking(FB) process of sector gears for car seat recliner using nickel chrome molybdenum steel(SNCM220) plate. The optimal design of embossing circle is changed to oval with labors' experiences and finite element analysis. The maximum principal stress and effective strain in a forming process are analyzed by commercial finite element software to solve the problems in embossing stage of FB process. As a result of FE analysis, the maximum principal stress in forming is lower than yield point of material. It is shown from experiments in the modified die that the formed gear does not break in embossing stage.
Characteristics of Machined Surface Roughness and Surface Layers of WC-Co Tools with Plasma Source Ion Implantation
Kang, Seong-Ki ; Kim, Yung-Kyu ; Wang, Duck-Hyun ; Chun, Young-Rok ; Kim, Won-Il ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 1, 2010, Pages 106~113
The most suitable condition for plasma source ion implantation(PSII) was found based on the study of the characteristics of PSIIed tool and machined surfaces. The depth analysis according to the chemical bonding state of elements and surface component elements through the XPS and SIMS, was conducted to find the improved property of the PSIIed surface. Due to the diffusion of PSII, the nitrogen was found up to a depth of about 150nm according to the supplied voltage and ion implanted time. The deep diffusion by nitrogen caused the surface modification, but the formation of oxide component was found due to the residual gas contamination on the surface. Statistical method of ANOVA was conducted to find the effects of spindle speed and feed rate in interaction for machined surface roughness with PSIIed tools. The surface modification was found largely occurred by the nitrogen implanted surface with 2 hours for 27kV, 35kV and 43kV.