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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
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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 the Performance Evaluation of Heavy Duty Handling Robot using Laser Tracker
Ko, Hae-Je ; Jung, Yoong-Yo ; Shin, Hyeuk ; Ryou, Han-Sik ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 1~7
The aim of this research is to evaluate movement and path characteristics of developed heavy duty handling robot using laser tacker(API T3) according to the ISO 9283 robot performance evaluation criteria. AS carry out 3D modeling and simulation using CATIA, a test cube was set up to select moving and measuring range of robot. Performance test for pose and distance accuracy, path and path velocity accuracy under payload zero and 440kgf was accomplished. The resulted output data show the reliability of the developed robot.
A Study on the Contour Design of the Hinge Mechanism for a Mobile Phone Driven by Continuous Torques
Park, Jong-Keun ; Lee, Soo-Jun ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 8~18
A total stroke of an opening or closing motion of a hinge mechanism for a folder-type mobile phone is composed of two portions. In the first portion, human fingers act a torque to open or close the folder. In this portion, the rotating folder compresses the coil spring installed in the hinge mechanism. In the last portion, this compressed coil spring generates a torque to rotate the folder. In this study, we have developed an alogrithm to design a hinge mechanism to be operated by an arbitrary continuous torque in the first portion of the total stroke. Consequently, we can design hinge mechanisms that satisfy various demands of consumers. A pair of contours installed in the mechanism plays an important role. It transforms the folder's of consumers. A pair of contours installed in the mechanism plays an important role. It transforms the folder's rotational motion into translation to compress the coil spring in the first portion; on the other hand, it transform translational motion into the folder's rotation in the last portion. Using this algorithm we have designed the pair of the contour curves operated by an arbitrary continuous torque.
The Study on Development of Fixed Displacement Piston Pump for Special Access Vehicle
Park, Jeong-Ho ; Kim, Moon-Kyung ; Choi, Suk-Chang ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 19~27
Cylinder block is driven by tapered piston for bent-axis type piston pump, so that geometrical mechanism is very complicate. Piston rod must have not separated from shaft when shaft and piston rod is assembled. For this reason, shaft design is changed. Finite element analysis is performed for analyzed structural stability and flexible dynamic behavior. The result of the analysis, maximum equivalent stress occurred under yield stress, therefore structural stability is satisfactory, and flexible dynamic analysis give useful information about driving gear. These background data is avail of manufacture of piston pump.
Mode Analysis of Coupled System
Kim, Jong-Do ; Yoon, Moon-Chul ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 28~34
The suggested coupled system was analyzed using FRF and mode analysis. The eigen-mode of FRF analysis is consistent with that of conventional FFT in spectrum. Also, three numerical responses of second order system, which are coupled, was obtained using the Runge-Kutta Gill method. The displacement, velocity and acceleration response were calculated for the numerical analysis of coupled system and the displacement response was used for the calculation of FRF of this system. Using the mixed response of 1st and 2nd mode in example, the FRF was analysed for the analysis of mixed mode couple system. Also, its mode shape was acquired by solving the eigen problem of coupled system.
Mode Analysis of Uncoupled System
Kim, Jong-Do ; Yoon, Moon-Chul ; Kim, Seon-Jin ; Yang, Bo-Suk ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 35~41
In this study, a mode analysis of uncoupled system was discussed using FRF. The eigen-mode range of FRF analysis is consistent with conventional FFT in spectrum. Also, the numerical response of second order uncoupled system was obtained using the Runge-Kutta Gill method. The displacement, velocity and acceleration response were calculated after numerical analysis and its response was used for the calculation of FRF for uncoupled system. Using the separated and mixed response of 1st and 2nd mode in example, its FRF was analysed for the prediction of the uncouple systems and its mode shape was calculated by solving the eigen problem.
Flow and Performance Analysis of Atomizing Nozzle
Kim, Bong-Hwan ; Ryu, Kwang-Hyun ; Jung, Eun-Ik ; Cho, Eun-Man ; Lee, Jung-Eun ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 42~48
The aim of this study is to investigate the influence of driving atomizing nozzle position, the slope of sludge entering tube and supplying air flow rate on the performance of sludge air dryer. This paper deals with optimization of the geometry of the atomizing nozzle for sludge drying using computational fluid dynamics and drying performance test using pilot air dryer. The air drying system was composed of the atomizing nozzle which made high-speed fluid field. dewatered cake was crushed at the high-speed zone as the first step and formed intto dried powder of sphere shape by the collision between particles at the circling zone. The CFD analysis results show when the slope of entering sludge tube is smaller, suction air amount is increased. It is shown that the developed atomizing nozzle is very excellent in the drying performance through pilot test.
Stability Analysis of Cracked Cantilever T-beams Subjected to Subtangential Follower Force
Son, In-Soo ; Jo, Jeong-Rae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 49~55
In this paper, the stability of cracked cantilever T-beams subjected to subtangential follower force is investigated. Also, the effect of subtangential coefficient and crack on the natural frequency of T-beams is presented. Based on the Euler-Bernoulli beam theory, the equation of motion is derived by the energy expressions using extended Hamilton's Principle. The crack is assumed to be in the first mode of fracture and to be always opened during the vibrations. The values of critical follower force and the stability maps of cantilever T-beams are obtained according to the subtangential coefficient and crack severity. The results of this study will contribute to the safety testing and the stability estimation of cracked T-beams subjected to follower force.
Computational Analysis of 355 UV Laser Single-Pulsed Machining of Copper Material Considering the Strain Rate Effect
Lee, Jung-Han ; Oh, Jae-Yong ; Park, Sang-Hu ; Shin, Bo-Sung ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 56~61
Recently, UV pulse laser is widely used in micro machining of the research, development and industry field of IT, NT and BT products because the laser short wavelength provides not only micro drilling, micro cutting and micro grooving which has a very fine line width, but also high absorption coefficient which allows a lot of type of materials to be machined more easily. To analyze the dynamic deformation during a very short processing time, which is nearly about several tens nanoseconds, the commercial Finite Element Analysis(FEA) code, LS-DYNA 3D, was employed for the computitional simulation of the UA laser micro machining behavior for thin copper material in this paper. A finite element model considering high strain rate effect is especially suggested to investigate the micro phenomena which are only dominated by mechanically pressure impact in disregard of thermally heat transfer. From these computational results, some of dynamic deformation behaviors such as dent deformation shapes, strains and stresses distributions were observed and compared with previous experimental works. These will help us to understand micro interaction between UV laser beam and material.
Energy dissipation by particle sloshing in a rolling cylindrical vessel
Lee, Soo-Hyuk ; Heo, Sung-Mo ; Cho, Hye-Min ; Son, Hyun-Sung ; Jeong, Seong-Min ; Park, Jun-Young ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 62~68
In the engineering field, sloshing in rolling vessel is a hot issue because of the connection with ship stability problem. The sloshing phenomena also can be utilized in the field of structure or facility vibration damper. This paper explores the possibility which sloshing of multi-particles can be used to dissipate energy in a rolling container. This energy dissipation can be utilized to the application of rotating damper. Some of the parameters expected to dissipates energy, such as vessel size, particle size, mass fraction and ramp height, have been experimentally and theoretically studied.
Finite Element Simulation for Design of Compound Forging Process for a Hollow Flanged Spindle
Kim, Yohng-Jo ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 69~75
A hollow flanged spindle is generally used for the assembly of the driving shaft in some vehicles. This part has conventionally been manufactured by both hot forging and machining process, in which case a circular billet is hot-forged into a flanged spindle blank and then its central part is machined for hollow. There fore, the development of a new forming technology without further machining processes has strongly been in demand. In this study, a new compound forging process of the hollow flanged spindle was proposed through the finite element simulation. By the proposed compound forging process, both extruding of the spindle body part and piercing for the hollow inside it can be performed at the same time. Metal flow patterns, forging defects and forging forces were investigated through the finite element simulation results.
A judgment algorithm of the acoustic signal for the automatic defective manufactures detection in press process
Kim, Dong-Hun ; Lee, Won-Kyu ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 76~82
A laborer always watched a process of production carefully but defective manufactures were inspected after press process. These inspections made a waste of human power and defective manufactures could make a serious damage of press mold. Therefore, AE(Acoustic Emission) system was introduced to prevention of the damage of the press molds, to a real time detection of defective manufactures and to save human power. AE system was introduced to solve this problem which is a defection defective manufacture on real time and to prevent the damage of the press mold. In this research we get acoustic emission signal in accordance with weight and processing method of press by using AE sensor, Preamplifier, AE board signal board which occurs press processing and it analyzed various signal through using CMD8 software on the time. From the result, we found that the intensity and shape of the signal were changed according to the weight and processing type of the press. By using this special algorithm, it can judge the acoustic signal which occurs from press on real time.
A Study on the Enhancement of Durability for the Power Steering Oil Seal of Automotive
Choi, Hyun-Jin ; Choi, Seong-Dae ;
Journal of the Korean Society of Manufacturing Process Engineers, volume 9, issue 3, 2010, Pages 83~88
This study aimed to enhance the durability by distributing the stress concentration at the contact and increasing the mechanical characteristics, as well as by changing the surface shape for LIP in the low-pressure seal among ail seals installed to the power steering of automotive. Accordingly, results were derived from comparisons and reviews with ail seals under the existing mass production by carrying out the performance tests after designs and productions are done with the addition of embo shapes on the surface of LIP in the low-pressure seal. As a result of this study, it has been identified that the durability of oil seals with the addition of embo shapes was enhanced with higher radial force and less variation in the internal diameter for the LIP. In addition, it was seen that the sealing ability for those oil seals is superior to the existing oil seals as their rotational torque values are less than those of the existing oil seals.