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 11, Issue 6 - Dec 2012
Volume 11, Issue 5 - Oct 2012
Volume 11, Issue 4 - Aug 2012
Volume 11, Issue 3 - Jun 2012
Volume 11, Issue 2 - Apr 2012
Volume 11, Issue 1 - Feb 2012
Selecting the target year
A Study on the Temperature Distribution Characteristics of NAS Battery Module
Heo, Doo-Sang ; Yi, Chung-Seob ; Jeong, Hyo-Min ; Chung, Han-Shik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 1~6
This paper addresses the issue of Renewable Energy for Electricity Storage device is one of the NAS (Sodium-Sulfur) battery will be about the module. For safety reasons, not the actual battery cells using a dummy cell in the module's operating temperature setting to examine the characteristics of the insulation vacuum of the wall temperature and external temperature changes measured over time. Upper and lower boundaries of the wall vacuum insulation characteristics cotton C intervals over time, average
, but the temperature is rising, 4C section with little temperature change did not occur. On the other hand, about
in section 4D, and it was confirmed that the temperature rises. Wall vacuum insulation characteristics over time to look at the experiments and measurements are described.
An Analysis of the Cutting Force for Peripheral End-milling Considering Run-out
Kim, Jong-Do ; Yoon, Moon-Chul ; Kim, Byung-Tak ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 7~12
The cutting force for peripheral end-milling considering run-out property was estimated and its result was compared with that of measured one. An experimental coefficient modelling was used for the formulation of theoretical end-milling force by considering the specific cutting force coefficient. Also, the specific cutting force, that is the multiplication of specific cutting force coefficient and uncut chip thickness, was used for the prediction of end-milling force. The end-milling force mechanics with run-out was presented for the estimation of theoretical force in peripheral end-milling by considering the geometric shape of the workpiece part. As a result, the estimated end-milling force shows a good consistency with the measured one. And it can be used for the prediction of force history in end-milling with run-out which incurs different start and exit immersion angle in entering and exiting condition.
Dynamic and Static End-milling Force Analysis According to Workpiece Geometry
Yang, Jae-Yong ; Yoon, Moon-Chul ; Kim, Byung-Tak ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 13~19
There are many dynamic properties in measured end-milling force. So, it is difficult to predict the real static property of end-milling force. Also the behavior of end-milling force is very complex to predict with the measured one. To extract the static property from measured force, it must be filtered and its problem is closely related to a de-noising one. Also this paper presents alternative de-noising method of end-milling force using wavelet filter bank, based on the wavelet transform and its inverse one. In this paper, by comparing the measured force and its wavelet filtered one, the fundamental end-milling force property after wavelet transform is well reviewed and analyzed. This result of wavelet filtering with filter bank shows the static force of end-milling which has severe dynamic properties occurring in entry and exit state of edge emersion into the workpiece.
Machinability Evaluation and Cutting Condition Selection of Cellulose Acetate for Manufacturing of High-quality Spectacle Frames
Kang, Ik-Soo ; Lee, Seung-Yong ; Choi, Hyun-Jin ; Lee, Tae-Ho ; Choi, Sung-Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 20~24
The objective of this study is to investigate proper cutting conditions of cellulose acetate(CA) for eyewear frames. Various cutting experiments with variation of spindle speeds and feed rates are conducted to evaluate the machinability of CA. The machinability of CA materials were discussed in terms of the cutting forces, surface roughnesses and chip formations. The cutting conditions of high spindle speeds and the feed per tooth of less than 0.05mm are recommended considering the surface roughnesses and chip formations. Also, the correlation between the surface roughness and the chip formation is investigated. These results are able to be applied to design the high-speed machine tool of CA frame.
Analytical Prediction of Bearing Life and Load Distribution for Plugin HEV
Zhang, Qi ; Kang, Jae-Hwa ; Yun, Gi-Baek ; Lyu, Sung-Ki ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 25~30
The transportation is almost dependent on a single fuel petroleum with transportation energy dilemma. Hybrid Electric Vehicle(HEV) technology holds more advantages on efficiency improvements for petroleum consumption at the transportation. And bearing is recognized as the important component of gearbox. Gearboxes for HEV transmission have been ensured the highest reliability over some years in withstanding high dynamic loads. At the same time, the demands of lightweight design and cost minimization are required by thought-out design, high-quality material, superior production quality and maintenance. In order to design a reliable and lightweight gearbox, it is necessary to analyze bearing rating life methods between standard and different bearing companies with calculation methods for modification factors. In this paper, the influence of life time of bearings will be pointed out. Bearing contact stress and load stress distribution of HEV gearbox are obtained and compared with Romaxdesigner and BearinX. And the unequal wear of the left bearing for the gearbox intermediate shaft is investigated between simulation and test.
The Improved Cutting Parameter Design of End-milling for SM25C Material
Im, Sung-Hoon ; Kim, Kyeong-Hwan ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 31~38
In this paper, we selected primary cutting parameters that influence on surface roughness of cut bottom surface in end-milling for SM25C material. Those are overhang, depth of cut, feed rate and spindle speed. And then performed orthogonal array experiment and ANOVA by Taguchi method to determine that improved level combination of cutting parameters for betterment of working efficiency and surface roughness one of quality characteristics. And we verified a advisability of prediction model by verification test about level combination. From the results, main cutting parameter influences on surface roughness is spindle speed and the next is feed rate.
A Study on the Forging Prototype Manufacture of Aluminium 7050 Alloys
Kang, Seong-Ki ; Lee, Jea-Kun ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 39~45
In this paper, process conditions are investigated for elimination of the grain coarsening and improved material flow during forging process by both of experiments and FEM analysis. Particular interest has been given to understand role of preform shape on the grain coarsening behavior and magnitude of the hammer forging load. As the results of FEM simulation by using DEFORM-3D, the simulated forging loads were 2,200ton in the case of a machined bar which is machined from 65mm to 60mm diameter, and below 1,900ton in the case of machined preform, respectively. The use of preform has been beneficial for reduction of the forging load and elimination of the grain coarsening. However, in the case of as received bar and the round bar, which was machined to 2.5mm thickness in surface layer, some degree of local grain coarsening behavior has been observed. The optimized preform shape could be properly designed by applying the FEM simulation.
Effect of Metals used in Orthopedic on Magnetic Resonance Imaging I
Kim, Hyeong-Gyun ; Choi, Seong-Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 46~50
Stainless steel and titanium used for orthopedic prosthetic metal, magnetic resonance imaging was measured quantitatively the extent of distortion. Based on reading tests at varying metal magnetic resonance imaging (MRI) were investigated. To two image acquisition conditions for having three metal bodies mutually quantitative it compared analyzed the image of cross direction and the image of lengthwise. As for the distortion of the magnetic resonance image, as for the distortion of image it became small in the order of Clip, Strainless and Titanium. In addition, with T1WI and T2WI which are image acquisition condition T2WI the distortion of image became small. As for the distortion of the image by the metal, you could see the distortion of image in elliptical shape, the metal a bigger image distortion appeared in many parts. If clinical doctor has the condition of the same operation, use the Titanium material, it can, raising the diagnostic value of magnetic resonance image inspection after the operating from Stainless.
Study on Structure Design of Stationary Fixture Type Automatic Rotary Drilling Machine for Maritime Base Rock
Jeong, Kyeng-Sik ; Lee, Chul-Hee ; Lee, Kwang-Hee ; Lee, Sun-Kon ; Kim, Myeong-Kyu ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 51~54
This paper aims to design and analyze the stationary fixture type automatic rotary drilling machine and estimate the safety of the machine through simulations. Working conditions of typical rock excavating machines are mostly affected by geographical conditions on the sea, such as by the ebb and flow of the tide or high waves. Due to the size of machines, it is difficult to move and install machines. So it is necessary to develop a machine that not only can be moved and installed more easily also be operated more quickly and automatically. To validate the safety of the designed structure of the machine, static analysis has been carried out. The results of stress and deformation analysises show that the designed machine is stable and safe in hard working condition.
A Study on the Measurement Method and Uncertainty Factors for Precision Inspection to Feed Unit of High Precision Machine Tool
Kim, Sang-Hwa ; Kim, Byung-Ha ; Choi, Woo-Gak ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 55~61
Very important content in performance evaluation of machine tool is positioning accuracy and repeatability precision measurements of feed mechanism. A study analyses the measurement method and uncertainty factors by ISO-based test method. Reliable results can't be derived without the notion of measurement uncertainty. The reason is that the measured value includes a lot of uncertain factors. Finding the factor that affects the measurement of parameter is important for estimation of measurement precision. In this paper, the evaluation of uncertainty analysis about positioning accuracy and repeatability precision measurements of high precision feed mechanism is presented to evaluate the important factors of uncertainty.
A Study on Flow Coefficient and Flow Characteristics for Butterfly Valve by Numerical Analysis
Kwak, Kyung-Min ; Cho, Ji-Sung ; Kim, Jin-Dae ; Lee, Jung-Hyung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 62~66
The objective of this study is to simulate flow coefficient and flow characteristics such as velocity and pressure distribution for butterfly valve. Butterfly valves used in this study are 65A, 80A and 100A, in size, and of which the opening angle is varied. The flow coefficient, Kv, increases as the disc opening and valve size are increase. When using flow coefficient meanwhile specific curve of flow rate is also determined. The flow velocity between disc and seat increase as the disc opening decrease. The re-circulating zone is also observed in downstream behind disc.
A Study on Cutting Characteristic in Turning Ductile Cast Iron(FCD500)
Oh, Sung-Hoon ; Kim, Ho-Geon ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 67~71
The purpose of this study is to investigate cutting characteristics and wear behavior in FCD500 ductile cast iron turning with different cutting tools, tungsten-carbide and CBN. Mechanical property, cutting characteristics and the application to the real industrial area is the final purpose. FDC500 ductile cast iron is now widely used in the various commercial vehicle parts for increased machine abilities which accrue more tensile strength with lower hardness. Several studies have been fulfilled for the material and heat-treatment area, but few with the cutting characteristics and wear behavior in the turning area.
Structural Safety Analysis on Bicycle Suspension Seat Post
Han, Moon-Sik ; Cho, Jae-Ung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 72~81
This study investigates structural, fatigue and modal analyses at bicycle suspension seat post. When weight is applied to the saddle, models 1 and 2 have the weakest strength at the part connected with saddle. And model 2 is greater total deformation and equivalent stress than model 1. Among the cases of nonuniform fatigue loads at models 1 and 2, 'SAE bracket history' with the severest change of load becomes most unstable but 'Sample history' becomes most stable. In case of 'Sample history' with the average stress of 0 to
and the amplitude stress of 0 to
, the possibility of maximum damage becomes 4%. This stress state can be shown with 5 to 7times more than the damage possibility of 'SAE bracket history' or 'SAE transmission'. Model 1 has better impulse relaxation and passenger sensitivity than model 2. The structural result of this study can be effectively utilized with the design of bicycle suspension seat post by investigating prevention and durability against its damage.
Fracture Mechanic's Approach on Retardation Behaviors under Overloading
Kang, Yong-Goo ; Park, Jun-Young ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 82~89
In order to clarify the effect of overload on crack growth behaviors, fatigue tests for overload were carried out for round plain specimens of SM45C steel. In the experiment, typical semi-elliptical crack shape was found and further crack growth behaviors were tested. Using three types of single overload fatigue tests, Crack growth retardation phenomenon were examined. The growth rate of surface crack(da/dN) during retardation period was analyzed in terms of
. On the growth rate of surface crack analyzed by
, the dependence of overload stress levels appears. However, on the growth rate by
obtained by Willenborg analysis, there is a liner relationship between da/dN and
with narrow scatter band.
Forced Vibration Analysis of Elastically Restrained Valve-pipe System
Son, In-Soo ; Yoon, Han-Ki ; Min, Byoung-Hyun ; Hur, Kwan-Do ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 90~96
The forced vibration response characteristics of a elastically restrained pipe conveying fluid with attached mass are investigated in this paper. Based on the Euler-Bernoulli beam theory, the equation of motion is derived by using Hamilton's principle. The effects of attached mass and spring constant on the forced vibration characteristics of pipe at conveying fluid are studied. The forced deflection response of pipe with attached mass due to the variation of fluid velocity is also presented. The deflection response is the mid-span deflection of the pipe. The dimensionless forcing frequency is the range from 0 to 16 which is the first natural frequency of the pipe.
Thermal Insulation Property due to Internal Air-layer Content of Warm Multi Layer Materials by using Numerical Analysis
Chung, Sung-Won ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 97~103
This study investigates thermal insulation properties of multi layer materials depending on thickness of air layers. Numerical analysis on the heat flow of different insulating materials was conducted to identify whether their temperature distributions demonstrate the reduced rate of heat transfer conclusively or not. Analytical model is divided into two categories. One is to distinguish temperature distribution of the air-layer materials from the non-air layer ones. The other is to compare the efficacy between eight-layered insulating materials with no air-layer contained and three-layered insulating materials which include an air-layer definitely. In the latter case, the identical thickness is assigned to each material. The effect of thermal insulation by including an air-layer is verified in the first analytical model. The result of the second model shows that the insulation of the eight-layered materials is coterminous at the three-layered ones with an air-layer and the thermal insulation of the two materials is imperceptible. The benefits of cost and energy saving are anticipated if air-layers are efficiently incorporated in multi layer insulating materials in a greenhouse.
A Study on Balancing of High Speed Spindle using Influence Coefficient Method
Koo, Ja-Ham ; Kim, In-Hwan ; Hur, Nam-Soo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 104~110
The spindle with a built-in motor can be used to simplify the structure of machine tool system, while the rotor has unbalance mass inevitably. A high-speed spindle can be very sensitive to rotating mass unbalance which has harmful effect on many machine tools. Therefore, the balancing procedure to reduce vibration in rotating system is certainly needed for all high-speed spindles. So, it was performed with a spindle-bearing system for CNC automatic lathe by using numerical procedure. The spindle is supported by the angular contact ball bearings and the motor rotor is fixed at the middle of spindle. The spindle-bearing system has been investigated using combined methodologies of finite elements and transfer matrices. The balancing was performed through influence coefficient method and the comparison was made by whirl responses between before balancing and after balancing. As a result, balancing of simple spindle model reduced whirl orbit magnitude in case of a completely assembled spindle model.
A Numerical Analysis on Prediction of Cut-diameter according to Vane Outflow Angle in the Axial-flow Cyclone
Yi, Chung-Seob ; Lee, Chi-Woo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 111~117
Dust collecting performance of axial-vane type cyclone for oil mist was analyzed in this study. For predicting cut diameter size of cyclone, the number and angle of vane (
) was simulated by CFD. As the result,
was decreased as the number of vane was increased and the angle of inclination(
) decreased, and it cause strong swirl flow. Therefore, it could be confirmed that as the number of vane was increased and the angle of inclination was decreased, cut diameter size was decreased. Also, by verifying the results of CFD through experiment, the cut diameter size could be
of flow rate.
Extract to Affected Factor to Surface Roughness and Regression Equation in Turning of Mold Steel(SKD61) by Whisker Reinforced Ceramic Tool
Bae, Myung-Il ; Rhie, Yi-Seon ; Kim, Hyeung-Chul ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 118~124
In this study, we turning mold steel (SKD61) using whisker reinforced ceramic tool (WA1) to get affected factor to surface roughness and regression equation. For this study, we adapt system of experiments. Results are follows; From the analysis of variance, it was found that affected factor to surface roughness was feed rate, cutting speed, depth of cut in order. From multi-regression analysis, we calculated regression equation and the coefficient of determination(
was 0.978 and It means regression equation is significant. Regression equation means if feed rate increase 0.039mm/rev, surface roughness will increase
, if cutting speed increase 50m/min, surface roughness will decrease
, if depth of cut increase 0.1mm, surface roughness will increase
. From the experimental verification, it was confirmed that surface roughness was predictable by system of experiments.
The Characteristics of Surface Roughness when Micro Blasting of Titanium Alloy with Spiral Movement
Kim, Sang-Hyun ; Wang, Duck-Hyun ; Lee, Se-Han ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 125~130
When conducting a powder blasting to a spinning cylindrical workpiece in the codition of 0.76~1.5(mm) in nozzle size, 1~5(atm) in working pressure, and 40~100(mm) in stand off distance, the value of surface roughness becomes under
, which is not enough to expand a bonding area. In the case of horizontal transfer blasting with 0.76mm of nozzle size, 100mm of stand off distance, and 2~5atm of working pressure,
of surface roughness has achieved regardless of feed rate.
A Study on Engine Performance and Exhaust Emission Characteristics of Gasoline Engine using Bio-ethanol Blended Fuel
Lee, Chi-Woo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 131~137
This article is about using the fuel mixed with 10% and 20% bio-ethanol to gasoline for the engine as a way to reduce carbon emission before commercializing future automobiles like fuel cell cars. The fuel mixed with 10% and 20% bio-ethanol showed output equivalent to that of the previous gasoline fuel. CO and
emission was somewhat reduced, but the difference was not significant. And the consumption of the fuel increased slightly. However, bio-ethanol is produced from bio mass growing with the absorption of carbon dioxide, so the total amount of carbon dioxide did not increase according to the result. In NOx, as the use of ethanol increases, the effect of reduction gets greater, and the emission of oxygen showed almost no change compared with gasoline.
Wave Propagation of Composite Materials Subjected to Dynamic Load
Ahn, Kook-Chan ; Jeong, In-Jo ; Jung, Dae-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 138~146
This research is to analyze the wave propagation characteristics of anisotropic materials subjected to the low-velocity impact. For this purpose, a higher-order finite element program is used to simulate the dynamic behaviors according to the changes of material property, stacking sequence and dimension etc.. Materials for simulation are composed of
stacking sequences. Finally, the results of this simulation are compared with those of wave propagation theory and then the impact responses and wave propagation phenomena are investigated.
Analysis of Cutter and Design of Chip Processing System for Large Scale Machine Tool
Lee, Jong-Moon ; Yang, Young-Joon ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 147~153
The demands of the large scale machine tools, for instance, such as planomiller, turning machine, boring machine, NC machine, have been gradually increased in recent years. As the performances of machine tools and/or cutting tools are advanced, it is possible to perform high-speed and high-precision cutting works. The effective treatment of wet chip, which is discharged from cutting works, becomes very important problems. Therefore, this study is forced on the design of large scale machine tools using CATIA V5R18 and analysis of cutter, which is considered as essential equipment in large scale machine tools, using MSC.Nastran & MSC.Patran. Especially, the relations between tolerated load of cutter, driving horse power and rpm of driving shaft in chip processing system are investigated through analysis. As the results, the reliability of design could be improved by evaluating simulated numerical values, it showed that tolerated loads of supported part and edged part of cutter are 87,000N and 14,450N, respectively.
Fault Detection of the Machine Tool Gearbox using Acoustic Emission Methodof
Kim, Jong-Hyeon ; Kim, Won-Il ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 154~159
Condition monitoring(CM) is a method based on Non-destructive test(NDT). Therefore, recently many kind of NDT were applied for CM. Acoustic emission(AE) is widely used for the early detection of faults in rotating machinery in these days also. Because its sensitivity is higher than normal accelerometers and it can detect low energy vibration signals. A machine tool consist of many parts such as the bearings, gears, process tools, shaft, hydro-system, and so on. Condition of Every part is connected with product quality finally. To increase the quality of products, condition monitoring of the components of machine tool is done completely. Therefore, in this paper, acoustic emission method is used to detect a machine fault seeded in a gearbox. The AE signals is saved, and power spectrums and feature values, peak value, mean value, RMS, skewness, kurtosis and shape factor, were determined through Matlab.
Experimental Evaluation of Fatigue Threshold for SA-508 Reactor Vessel Steel
Rhee, Hwan-Woo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 160~167
This paper is concerned with a particular fracture mechanics parameter
, known as the 'threshold stress intensity range', or 'fatigue threshold'. This threshold
constitutes, as it were, a hinge between the notion of crack initiation and the notion of crack growth. It has often been thought that, like the endurance limit, it could be an intrinsic criterion of the material. The study was conducted on a SA-508 pressure vessel steel used in the nuclear power industry. This material exhibits a typical threshold effect in the range of the crack growth rates which were determined; that is, below approximately
, the slope of the da./dN versus
curve is almost vertical. The value of
was determined at a growth rate of
mm/cycle according to the ASTM Standard for threshold testing. The fatigue threshold values are in the range 21
depending on the stress ratio effect.
Durability Evaluation of Automobile Control Arm
Kim, Jong-Kyu ; Jang, Byung-Hyun ; Park, Young-Chul ; Lee, Kwon-Hee ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 168~172
Control arm is the structural component that pivots on two places. One end of the control arm is attached to the body frame and the other end is attached to the steering knuckle. The former research proposed the structural design by applying optimization technique with aluminum alloy. This study suggests a durability test method on the developed upper control arm to validate the analysis results. The durability analysis results of the developed control arm by using MSC Fatigue is confirmed to be close to infinite life. The weak model of developed control arm which occurs to finite life is made to perform the durability test and the zig design is developed in this process.
Characteristics of Hot Forming of Magnesium Alloys for Light-weight Valves
Park, Joon-Hong ; Lee, Joon-Ho ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 173~179
In recent years, Magnesium(Mg) and its alloys have become a center of special interest in the automotive industry. Due to their high specific mechanical properties, they offer a significant weight saving potential in modern vehicle constructions. Most Mg alloys show very good machinability and processability, and even the most complicated die casting parts can be easily produced. In this study, Microstructure, Vickers hardness and tensile tests were examined and performed for each specimen to verify effects of forming conditions. Also to verify upsettability and forming limit of the specimen at room temperature and elevated temperature, upsetting experiments were performed. For comparison, experiments at elevated temperature were performed for various Mg alloy, such as AZ31, AZ91, and AM50. The experimental results were compared with those of CAE analysis to propose forming limit of Magnesium alloys.
A Characteristic Analysis of High Pressure and High Temperature 3-way Ball Valve
Lee, Joon-Ho ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 11, issue 4, 2012, Pages 180~184
3-way ball valves have been mostly used for high temperature/high pressure valves using in petrochemical carriers and oil tankers, which requires high quality products with confidentiality and durability. As a larger disaster may be generated by leakage of oil or gas from valves, thus the present research applied a numerical analysis method with thermal-structural coupled field analysis and the performance test. The Max stress by parts was confirmed through thermal-structural coupled field analysis and develop the 3-way ball valve design, which is safe on operating condition. And its performance was verified by carrying out pressure test, leakage test and durability test for the manufactured 3-way ball valves with satisfying it's regulations.