• 제목/요약/키워드: Manufacturing pressure

검색결과 1,604건 처리시간 0.032초

균일 화상 품질 구현을 위한 닥터 블레이드 접촉압력 근사모델링 (Approximate Modeling of Doctor Blade Contact Pressure for Realization of Uniform Image Quality)

  • 최하영;박승찬;이종수
    • 한국생산제조학회지
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    • 제22권2호
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    • pp.241-247
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    • 2013
  • The doctor blade is equipped in a toner cartridge and is a device to maintain the uniform thickness of a toner by controlling the pressure on the developing roller. The contact pressure between the developing roller and the doctor blade is one of the significant factors for image quality and durability of toner cartridge. The purpose of this study is to develop approximation model in order to minimize the time and cost which are needed much required in making optimal design of the doctor blade. Central composite design was used for the design of experiment and response surface design was used for approximation. The data for contact pressure were acquired through finite element analysis and data of image density and toner weight were acquired through experiment. The approximation model developed in this study has presented very high fitness.

블로우 몰딩 공정에서 분사 압력이 성형 두께에 미치는 영향에 관한 연구 (Study on the Effect of Gas Pressure on Bottle Wall Thickness in the Blow Molding Process)

  • 김동환;설상석
    • 한국기계가공학회지
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    • 제19권4호
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    • pp.36-44
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    • 2020
  • This study analyzed the deformation behavior of the high density polyethylene (HDPE) bottle in the blow molding process. We carried out finite element (FE) simulations using ANSYS Polyflow. First, the axisymmetric model was executed by 2D FE-simulation to determine the change of bottle wall thickness during the molding process. Then, the square model of the bottle was executed by 3D FE-simulation to gauge the effects of gas pressure on the change of wall thickness. The experiment results showed that the FE-simulations were able to upgrade the quality of the HDPE bottle in the blow molding process. These results can be used as guidance in adjusting gas pressure, as well as be extended for further study to determine process parameters such as temperatures, forming velocity, parison shape, etc.

ER유체 제어용 3포트 ER 밸브의 성능 고찰 (An Investigation of 3 Port ER Valve for Controlling Electro-Rheological Fluids)

  • 장성철;염만오
    • 한국공작기계학회논문집
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    • 제16권5호
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    • pp.41-47
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    • 2007
  • The structure of ER valve is simple that its designing and manufacturing are easy. The flow rate and pressure of ER fluids flowing in the ER valve are controlled only by electric field. In this study a three port ER valve is designed and manufactured. Then, the flow rate and pressure dorp of ER fluids flowing in the ER valve are measured. The system proposed controls flow rate and pressure fast. So, this system can be easily substituted for the existing hydaulic and pneumaitc control system.

고압 분사 홀더를 이용한 절삭가공에 대한 실험적 연구 (An Experimental Study on Cutting Process using High Pressure Injection Holder)

  • 정상완;정인국;이중섭;송철기;서정세
    • 한국생산제조학회지
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    • 제21권5호
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    • pp.790-796
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    • 2012
  • Chip curling occurred during cutting process for difficult-to-cut material detracts product qualities and productivity. Among of method preventing the phenomenon, high pressure injecting cutting oil is an alterative. In this study, the optimal nozzle was designed by CFD method and it was conducted to analyse on the effect of high pressure injection on chip shape generated during cutting process and wear of insert by experimental method. As the result, it could be confirmed that high pressure injection is favorable for preventing chip curling and insert from wearing.

칩 말림 방지를 위한 고압 분사 노즐 설계에 관한 연구 (A Study on Design of High Pressure Injection Nozzle for Avoiding Chip Curling)

  • 이중섭;윤지훈;정인국;송철기;서정세
    • 한국생산제조학회지
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    • 제20권6호
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    • pp.793-798
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    • 2011
  • In this study, it was grasped to the flow characteristics of cutting fluid injected by nozzle installed in high pressure holder for avoiding chip curling occurred during machining process. And for avoiding chip curling, the possibility of elimination under various chip conditions was checked. Consequently, the highest discharging pressure and velocity was shown in 150 of nozzle inflow angle. Also as nozzle outlet diameter is small, the pressure and velocity of injected flow are high. Moreover, It could be confirmed that width and thickness of chip have no direct effect on chip elimination and it is achieved by torque generated by injected cutting fluid.

자동차 동력조향용 유압호스의 압력맥동 감쇠특성 (Attenuation Characteristics of Fluid-Borne Pressure Ripple in Automotive Power Steering Hydraulic Hoses)

  • 김도태
    • 한국생산제조학회지
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    • 제7권3호
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    • pp.22-28
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    • 1998
  • This paper presents experimental investigations on the attenuation characteristics of pressure ripple in automotive power steering hydraulic hoses. Also, a mathematical model of hydraulic hoses is proposed to support design of the power steering hydraulic circuit and analyze the attenuation characteristics of pressure ripples. The experimental results show that the pulsation attenuation characteristics of hydraulic hoses is remarkably affected by the flexible metal tube inserted coaxially inside a hydraulic hose with a finite length as well as viscoelastic properties of hose wall. It is also shown that the predicted results by the model proposed here agree well with the measured results over a wied range of frequency.

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폴리스틸렌계 엘라스토머의 사출성형조건에 따른 기계적 물성 변화 (Variation of Mechanical Properties on Polystyrene Elastomer According to Injection Molding Conditions)

  • 한성렬;김준형;전승경;정영득
    • 한국기계가공학회지
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    • 제5권4호
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    • pp.46-52
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    • 2006
  • From the past, most of the studies about thermoplastic elastomers(TPEs) have been conducted for theirs compounded materials and morphology. However these studies do not directly affect on injection molding processing. Therefor this study is focus on the variation of mechanical properties on TPEs moldings by increasing injection molding conditions which included injection molding conditions include injection pressure, holding pressure, melt temperature, mold temperature. The used experimental TPEs is a group of styrene(TPS). Injection pressure slightly affected on tensile strength, shrinkage and hardness. Holding pressure only affected on hardness. The melt temperature was the most affective condition on tensile strength.

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3,000psi급 소형 퀵 커플러 내부유동에 관한 수치해석 (Numerical Analysis of the Internal Flow of Small Quick Coupler at 3,000psi)

  • 안희학;이중섭
    • 한국기계가공학회지
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    • 제15권2호
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    • pp.16-21
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    • 2016
  • This study is a numerical analysis of the flow characteristic of a quick coupler. The quick coupler is a popular coupling tool for pipelines in hydraulic and pneumatic systems. In this study, the flow characteristic of a quick coupler outlet is conducted about the flow coefficient. The quick coupler is analyzed for improving flow and confirmed with the study results. The velocities with pressure distribution according to inlet and outlet pressure drop of the coupler are also compared. The flow coefficient is analyzed according to the flow analysis result for each pressure drop. When the pressure drop is 1 psi, the flow coefficient (Cv) matched about 98% of the value provided by the actual product.

피스톤-실린더 기구에서 오일압력 분포에 관한 실험적 연구 (An Experimental Study on Oil Pressure Distribution in the Piston-Cylinder Mechanism)

  • 김영환
    • 한국기계가공학회지
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    • 제10권6호
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    • pp.77-82
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    • 2011
  • The piston-cylinder mechanism is widely adopted in the hydraulic machine components. In these cases, the hydrodynamic pressures are generated in the clearance gap between the piston and cylinder under lubrication action of the piston. Under the eccentric and tilted condition of the piston in the cylinder bore, the non-symmetric pressure distributions in the circumferential direction result in lateral forces. When the lateral forces act as increasing the eccentricity and tilting ratios, excessive wear can be result in cylinder and piston which are well known 'hydraulic locking' phenomena. In this paper, the hydrodynamic pressures generated in the clearance are measured using a stationary piston and moving cylinder apparatus. The experimental results showed that the hydrodynamic pressure distributions are highly affected by the speed and eccentricity of the cylinder and the oil viscosity.

연성해석을 이용한 CNG 차량 압력 용기용 밸브의 안전성 평가 (Safety Evaluation of a Cylinder Valve for Compressed Natural Gas Vehicle Pressure Vessels using Fluid-structure Interaction Analysis)

  • 이효렬;안중환;김복만;김화영
    • 한국생산제조학회지
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    • 제23권2호
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    • pp.103-108
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    • 2014
  • Growing concerns about environmental pollution have led to an increase in the demand for compressed natural gas (CNG) vehicles in recent years. CNG vehicles are equipped with a cylinder valve installed in a high-pressure vessel to control the CNG flow. The cylinder valve must meet high quality safety standards because the pressure vessel stores high-pressure CNG. Therefore, safety evaluation of the cylinder valve is necessary to ensure the safety of CNG vehicles. In this study, fluid-structure interaction analysis for the structural integrity of the cylinder valve were conducted using a commercial finite element analysis code(ANSYS WORKBENCH V14). The CFD analysis was performed using a steady-state technique according to the inlet and outlet pressures in order to predict the pressure distribution. Structural analysis was performed by a static structure technique at the maximum working pressure to evaluate the structural integrity of the cylinder valve. From the results, the safety factor of the valve component is between 1.57 and 21.5.