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한국기계기술학회지 [Journal of the Korean Society of Mechanical Technology]

간행물 정보
  • 자료유형
    학술지
  • 발행기관
    한국기계기술학회 [Korean Society of Mechanical Technology]
  • ISSN
    1229-604X
  • EISSN
    2508-3805
  • 간기
    격월간
  • 수록기간
    1999~2019
  • 등재여부
    KCI 등재
  • 주제분류
    공학 > 기계공학
  • 십진분류
    KDC 550 DDC 621
제16권 제5호 (26건)
No

〈학술연구〉

1

차량용 디젤엔진에 장착된 터보차져와 슈퍼차져의 복합 과급 성능에 관한 연구

강수영, 최인수

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1793-1799

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Increasing specific power, torque and high responsibility have come to the fore as the importantstrategy of reducing fuel consumption in vehicle engines. Therefore, the boosting performance of variousboosting devices has been investigated using a diesel engine simulation program. For the comparison ofboosting performance, the simulation result of a naturally aspirated 2.0 liter engine is used as a basis. Subsequently, the boosting effects of single turbocharger, single supercharger and 2-stage boosting systemcombined with a turbocharger and a supercharger are compared at the same engine condition. Thesimulation results show that the 2-stage boosting system can attain lower specific fuel consumption andhigher air mass flow. In low engine speed range, a supercharger mainly leads higher boostingperformance with higher responsibility in the combined boosting system.

4,000원

2

CO2 용접기 더블 와이어 릴을 겸비한 원격제어토치 성능에 관한 실험적 평가

김정혁, 오석형

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1801-1808

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The study discusses remote control torch system that is equipped with CO2 double wire reel. The welding machine is 30m away from the wire feeder at the industrial site and the feeder is three to five meters away from the torch. Accordingly, the welders cannot control the current and voltage that meets the welding condition during work when they are working at a place that prevents them from seeing the control panel such as inside a vehicle or tank or at a far work site. They also have no choice but to stop working to change the wire reel when it is completely burned out. Such work suspension resulting from frequent moves to adjust current and voltage as well as replace the wire and subsequent cooling causes welding defects. The study produced a remote control torch equipped with double wire reel by simplifying and streamlining the existing CO2 functions to reduce the troubling issue. The remote control torch equipped with double wire reel and the existing CO2 /MAG welding torch were applied as V-groove butt in the vertical position using 9mm rolled steel for SM50A welding structure. After completion of welding, the condition of welded surface beads went through visual inspection as well as radiographic inspection to analyze the welding quality inside the welded part. The study also evaluated reduction of welding defects, cost saving, the replacing performance against the existing commercial welders and the effect on possible compatibility.

4,000원

3

블레이드 형상 변경에 대한 쿨링팬 성능에 관한 연구

이동렬

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1809-1814

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This research is to investigate the performance analysis of cooling fan of the IT and electronic device with two different blade types and three different blade numbers of the cooling fan. Velocity, and temperature distributions of fluid over the flow domain of the flow channel are numerically calculated for the optimum design of flow channel with uniform inlet velocity. According to the calculations of convective heat transfer coefficient between blade and atmosphere in the flow domain, case 2 with 6 blases type shows highest performance of the cooling fan shapes in the present cooling fan model considering manufacturing process and cost.

4,000원

4

스크롤 공기 압축기용 고체윤활 코팅 특성에 관한 연구

김봉석

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1815-1821

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The coating of solid lubricant on the part of fixed or orbiting scroll wrap in a scroll compressor can not only reduce friction loss, noise & vibration and time cost for surface finishing but also improve efficiency and performance of the compressor. In this study, we found the most appropriate combination of the solid lubricant by carrying out many measurements and tests such as coefficient of friction, surface structure, the coating thickness and surface roughness for the various cases. We have come to conclusion that the most appropriate solid lubricant can be obtained by adding WS2 3% to Base(SM 3901) without any solvent and filler.

4,000원

<학술연구>

5

환기조건에 따른 유동특성 및 오염물질농도분포

박찬수

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1823-1831

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We have performed CFD simulation and analyzed flow and concentration fields for the basic data of the ventilation system for removing pollutants which were produced in a lecture room. The flow patterns indicated differently according to the arrangement of openings and the concentration distribution of pollutants were showed higher and lower because of the effect of that flow patterns. In the case of arranging the openings to the upper and lower side, the stagnation appearance of flow formed in the interested space. In the case of arranging the openings to the right and left side, the stagnation of high concentration pollutants appeared in the middle area of the interested space. On the increasing exhaust velocity, the distribution of pollutants appeared similar to the normal case, but the concentration of pollutants were lower.

4,000원

〈학술연구〉

6

전산유체역학과 실험을 통한 통풍시트 덕트의 유동특성 개선 및 성능평가

조호선, 조재웅

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1833-1838

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In this study, the ventilation of duct is simulated by CFD and thermal changes on the seat surface are measured experimentally. These models are the improved duct and the existing one installed at the real seat in order to test the thermal change 1 minute later. The seat with the existing duct has the temperatures of 26℃ and 25℃ on lumber and femoral parts respectively. However, the seat with the improved duct has the temperature of 1℃ lower than the seat with the existing duct. This result contributes to develop the improved duct. Hereafter, the methods used in this study are expected to be useful at checking the flow resistance loss of the ventilation seat duct and assessing the flow channel design.

4,000원

7

대용량 공유압 브레이커 성능해석에 관한 연구

김주용

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1839-1845

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The pneumatic hydraulic braker which is attached to an excavator is widely used in the construction industry field, and is increasing its capacity and performance because many users want high power and efficiency of the pneumatic hydraulic braker. The structure of a pneumatic hydraulic braker is composed of piston, rod(chisel), back head gas chamber, and directional control valve. The performances of a pneumatic hydraulic braker are impact force, impact energy, impact rate, etc., and depend on the hydraulic components and system. This paper will argue that the performances are investigated and analysed using the AMEsim program which is used in hydraulic and pneumatic system. It is shown that the performances of the heave duty pneumatic hydraulic braker are good in many fields relative to other brakers during the simulation process.

4,000원

8

친환경 연료처리제를 이용한 가솔린 차량의 배기가스 저감과 연비향상에 관한 실험적 연구

유종식, 김철수, 김민섭

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1847-1852

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The two experiments of gasoline vehicle using eco-friendly treatment(Ecoburn) were completed. The experiments was done on traveling using the performance testing mode for chassis dynamometer and road driving test. The experiments were employed to measure exhaust emissions and fuel consumption. In this experiment, the correlation between CO₂and fuel consumption were found in gasoline vehicle. The following results are obtained by analyzing the data relativity between exhaust emissions and additives. 1) If the value of exhaust emissions such as CO, HC, NOX, CO₂were improved as gasoline mixed additives at th ratio of 300:1. The value of fuel consumption were worse compare to those of exhaust emission. The improvement of resulting data value was best CO, HC, NOX and fuel consumption in the order named. 2) The value of CO₂ were to be nearly proportional to the fuel consumption value.

4,000원

9

파괴역학에 근거한 침탄치차의 강도평가

정봉수

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1853-1860

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A method is developed to simulate the fatigue crack growth in a carburized gear tooth considering the effect of residual stress. The calculation of stress intensity factor and the fatigue crack growth rates in the case layer are estimated by the experimental formula obtained in this study. The crack growth of carburized gears is measured by a crack gauge, and the validity of the simulation is confirmed. The critical length of initial crack which corresponds to the fatigue strength is introduced in the method, and a new design procedure of carburized gears is proposed based on the critical length of crack. As an example of the application of the procedure, the size effect is tried to discuss.

4,000원

10

LED 방열 히트싱크의 냉각 성능에 관한 연구

이동렬

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1861-1866

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This research is to investigate the cooling performance analysis of the heat sinks for LED light with four different fin types and two different fin numbers (16EA and 64EA) of heat sinks. Temperature distributions of fins over the flow domain are numerically calculated for the optimum design of heat sink fin types with uniform initial temperature of the bottom of the fins. According to the calculations of convective heat transfer coefficient between fin and atmosphere in the flow domain, S-curve fin type of heat sinks with 64EA of fins reveals the highest cooling performance of the heat sink fin types in the present cooling heat sink model.

4,000원

11

벽 경계를 갖는 전단유동에서 난류 열유속 대수모형의 개선

신종근

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1867-1873

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An algebraic model for turbulent heat fluxes which is originally suggested by Suga & Abe is modified on the basis of the elliptic blending equation. In order to satisfy the heat transfer characteristics of near-wall region and the flow center region far away from the wall, the model coefficients of the algebraic heat flux model are modified by using the solution of the elliptic blending equation. The predictions of turbulent heat transfer in a plane channel flow have been carried out with constant wall heat flux and constant wall temperature difference boundary conditions respectively. Also, the predictions are performed at various Prandtl numbers to test the applicability of the model. The prediction results show that the distributions of the turbulent heat fluxes and mean temperature are well captured by the modified algebraic heat flux model.

4,000원

〈학술연구>

12

담수설비용 3차 편심 버터플라이 밸브 개발에 관한 연구

안국찬, 김봉환, 정성원

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1875-1880

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The objective of this study is to calculate flow characteristics and structural safety for triple offset eccentric butterfly valve. The triple offset butterfly valve used in this study was 600mm in size, and the opening angles were 30 degree, 60degree and 90 degree. Structural and flow analysis of triple offset eccentric butterfly valve are carried out by using commercial code ANSYS and CFX version 14. The flow coefficient, Kv, increases as the valve opening increases. The results from fluid structure coupled analysis, maximum equivalent stress was calculated 462.06MPa at opening angle 60 degree.

4,000원

〈학술연구〉

13

확대유로 내부에 설치된 장방형 각주의 영향에 따른 유동균일도 수치해석

이철재, 심의보, 조대환

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1881-1886

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In this study, we have modeled a subsonic diffuser with rectangular prism and tried to investigate the influence of a turbulent wake flow by numerical simulation using computational fluid dynamics based on steady-state Navier-Stokes equation and standard k-ε model. A commercial CFD program, FLUENT, is used on the analysis. The turbulent wake is generated by a rectangular prism, which is installed at the diffuser. Flow Uniformity Showed the best results in the case of AR=1:1 and tended to be uniform in the critical point at Re=8.8×103.

4,000원

14

다중 부하계 구동 시스템의 성능 분석

최우석, 임원식

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1887-1893

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Engine power of industrial vehicle is used to control the driving load, steering load and operating load. In other words, one power source need to transmit part of power through several power transmission paths. To achieve this performance, we consider a gear box which have one input shaft and several output shaft. In this study, the performance of gear box is analyzed to find out the reliable test process in dynamometer. With test results, the validity of study is verified.

4,000원

15

초경 재료를 이용한 의료용 cutter의 개발

안영명, 이창훈

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1895-1901

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General end-mill is considered and chosen by kinds and properties of material before machining, but in case of orthopedic surgery, cutting performance of orthopedic end-mill must be always best because bone condition is checked after operative preparation including skin incision. Generally hard metal end-mill is used for high cutting performance in industrial fields. To apply hard metal end-mill to robotic orthopedic surgery, prototypes with STS are manufactured and tested for determining proper number of flutes and helix angle, additionally proper overhang length of end-mill from sleeve end was determined by checking deflection under cutting load and critical speed using FEM program. As a result helix angle, blade number and overhang length are determined as 45∘, 3, 7cm respectively.

4,000원

16

CO2용 전자팽창밸브 개발에 관한 연구

안국찬, 김봉환

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1903-1908

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This study was developed the electronic expansion valve using CO2 refrigerant. The electronic expansion valve consist of bellows, stepping motor, 3-stage reduction gear, poppet and orifice. Structural and flow analysis of electronic expansion valve are carried out using commercial code ANSYS and CFX version 14. Structural analysis was conducted for three type bellows(basic, rib and straight type). Asresults, value of maximum equivalent stress showed that basic type was smaller than rib and straight type.

4,000원

17

마찰력과 강성을 고려한 사출성형기 5절 토글 링크에 관한 연구

최주용

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1909-1914

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In this paper, the 5 joint toggle link of a injection molding machine is analyzed. Considering toggle link kinematics and frictions at the pin joints, clamping forces for each cross head position are calculated. The maximum clamping force and the install position of a tail-stock are determined by the stiffness of links, plates and tie-bar. The kinematic results of a finite element analysis considering friction and stiffness are compared with measured results.

4,000원

18

다상 토크 컨버터의 산업차량 적용에 대한 연구

임원식, 박성천

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1915-1920

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Because industrial Vehicles drive and work under heavy load condition, the gear ratio of transmission and the stall torque ratio of torque converter is high. Recently, to reduce the cost of vehicle, many people have interest in applying multi-phase torque converter to vehicle and reducing the gear step. In this study, the target performance of vehicle is analyzed and the performance matching of multi-phase torque converter is studied to equip torque converter to heavy duty folk lift vehicle.

4,000원

<학술연구>

19

고가선로 연변 철도진동 특성에 관한 실험적 연구

최재규

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1921-1927

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The train noise and vibration nearby the elevated railway make one specific issue. For the elevated railway, this paper concerns vibration by the bridge. this paper presents vibration level of vibration source of train. The prediction model gives the effects of ground attenuation, and barrier attenuation of noise. The acceleration array method is used to search vibration propagation characteristics of elevated structure to predict the vibration propagation from an elevated railway. Based on the results, this paper proposes the source model of elevated structure-borne vibration and the calculation model for elevated railway vibration. Also measure results are presented with rolling vibration and elevated structure vibration.

4,000원

20

상용 차량의 캡 진동 저감에 관한 연구

최병재, 김병삼

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1929-1933

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Abnormal cab vibrations in the Y direction in commercial vehicles during driving(70~90kph) are not common vibrations that happen to vehicles during driving and can be an obstacle to normal driving. This study conducted Operation Deflection Shape(ODS) testing to identify the causes of those abnormal cab vibrations and find solutions for them and also a sine sweep test to find resonance and frequency in the cab suspension system and set directions for improvement. The study also altered the shape of the bush inner part for changes to the rigidity features of the cab bush in the Y direction and revised the design with optimal rigidity in the Y direction, thus improving abnormal cab vibrations in the Y direction during driving.

4,000원

〈생산기술〉

21

Smartrol 무인 자동화설비 개발을 위한 제동부 해석

이정익, 고병갑

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1935-1943

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In case of many products placed on the production line in automobile production, some line is personnel visually identifiable, such as CCTV, while the rest areas are not identifiable. However, because the position of accidents is not scheduled and every accidents should be analyzed at every point, every accidents is not easy because you need to an immediate response. The record cause of the accident is difficult to understand, not until after the accident for the accident cause analysis of fragmentary and mechanical information so that future accidents have difficulty measures be established. To prevent this, the car accident occurred in the manufacturing plant personnel to deploy and monitor in every area of enterprise is too burdensome labor costs too high. In this study, automated car production plant and load transfer system crash, accident collision and records are available for real-time wireless transmission, the administrator determines that situation can be immediately developed the electronic mono rail system(EMS). You will start to develop the control of EMS and stop control is critical for the correct parts first perform CAE analysis to develop a prototype.

4,000원

22

스테인리스 와이어 절단 공정 자동화장치 개발

김봉석, 오익수

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1945-1950

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Automatic continuous manufacturing system is necessary to raise the productivity and strengthen the competitiveness in the wire manufacturing. The automatic wire cutting technology is an important element to link various processes and it is crucial technology to obtain high accuracy and quality of the wire. This study was performed to develop an automatic stainless steel wire cutting equipment that is consist of the first and second cutting equipments besides related devices to cut stainless steel wire. This wire cutting equipment can cut wire with high accuracy, and it can prevent sintering and discoloration.

4,000원

23

저속 충돌에 의한 자동차 범퍼의 파손에 대한 유한요소 해석

김기선, 조재웅

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1951-1956

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The automotive bumper has the functions of strength, rigidity and fine sight. It protects the driver, front and rear sides of car body through shock absorption at the traffic accident of car. This study investigates the impacts on front side and corner with the low speed of 4.5 km/h by using the model of SUV car body. The models are modelled by CATIA program with three dimensions and are analyzed by the finite element program of ANSYS Explicit STR. The maximum equivalent stresses at impacts of front side(case 1) and corner (case 2) at bumper are 261.72MPa and 365.02MPa respectively. As this stress at case 2 becomes 40% higher than at case 1, the impact of corner is happened easier than at the damage at the impact of front side. These stresses at case 1 and case 2 are shown above the yield stress at material property of steel, it is thought that there are the possibilities of plastic damages at two cases. The maximum deformation and equivalent stress at the support 2 of case 2 become 5 times and 3 times higher than at the support 1 respectively. The damage possibility due to impact at low speed is investigated by the basic analysis result of this study. And this result can be utilized at inspecting the result of impact test on bumper hereafter.

4,000원

24

소형어선의 동력인출장치 원격제어시스템 개발에 관한 연구

봉태근, 조대환

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1957-1962

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This research was conducted to develop the system for a remote control operation for the existing power transfer unit. It was also conducted to supplement the shortcomings of the existing lever control operation, and to develop a system for applying the clutch mechanism and shut down equipment. The developed net hauler for coastal small vessels will result in better fishing with improved efficiency and lower manpower consumption by remote control of winch system.

4,000원

25

수산폐기물 재활용을 위한 건조 및 분쇄처리 장치의 개발

김봉환, 안국찬

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1963-1967

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Waste oyster shell is a waste product from oyster-culturing farm and also presents a major disposal problem in itself. The present study is conducted to develop equipments for recycling waste oyster shells etc. Through the processing of the recycling treatment of wasted marine products, it is transfered and used as the other functional materials. The advanced drying and crushing equipments are designed and conducted the performance evaluation. Finally, it was shown that performance of these are superior to that of the other existing equipments.

4,000원

26

원부재료 이송용 정밀 기어펌프 개발

이주상, 윤상진, 김치균

한국기계기술학회 한국기계기술학회지 제16권 제5호 2014.10 pp.1969-1974

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This paper describes the development of precision gear pump for transmitting source material of chemical machinery. Gear pump design is carried out considering geometry of gear and strength of shaft by CAE program. Teeth of gear is machined by ultra precision grinding, and by inspection of profile and lead, JIS 0-grade gear is manufactured. Through the pump performance test, pump discharge volume per one revolution is in a good agreement with the target values when varying rotational speed and working temperature.

4,000원

 
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