• 제목/요약/키워드: Working process

검색결과 2,776건 처리시간 0.03초

노동강도 제거 및 양끝정렬 균일화를 위한 양끝절단포장적재시스템 개발 (The package loading equipment development cutting both ends in the process of packaging lumber for improving the working environments)

  • 강지호
    • 대한안전경영과학회지
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    • 제10권2호
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    • pp.95-103
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    • 2008
  • The package loading process of the lumbering industry is an operation that after a pair of workers bind three or six lumbers into one unit and cut both ends of the lumbers, transports the weight cargo of 30-50kg by one meter, pack and load at a height of 1.2 meters. This package loading process causes lots of noise and wood dust when workers carry out the heavy work as the above. Therefore we developed the monolithic both ends cutting package loading equipment in order to prevent from getting musculoskeletal disease. An loading bar working system of this equipment is improved from pneumatic pressure system to oil pressure system, furnished the newly designed flow dividers, and developed the new system that a both end array is loaded identically. Also we developed the safety equipment of loading bar in order to prevent workers mistake and overload from malfunction during the package loading process. The main cause of job evasion on working place could be solved by preventing the musculoskeletal disease and improving the working environments.

노동강도 제거 및 양끝정렬 균일화를 위한 양끝절단포장적재시스템 개발 (The package loading equipment development cutting both ends in the process of packaging lumber for improving the working environments)

  • 강지호
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2008년도 춘계학술대회
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    • pp.135-147
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    • 2008
  • The package loading process of the lumbering industry is an operation that after a pair of workers bind three or six lumbers into one unit and cut both ends of the lumbers, transports the weight cargo of 30-50kg by one meter, pack and load at a height of 1.2 meters. This package loading process causes lots of noise and wood dust when workers carry out the heavy work as the above. Therefore we developed the monolithic both ends cutting package loading equipment in order to prevent from getting musculoskeletal disease. An loading bar working system of this equipment is improved from pneumatic pressure system to oil pressure system, furnished the newly designed flow dividers, and developed the new system that a both end array is loaded identically. Also we developed the safety equipment of loading bar in order to prevent workers mistake and overload from malfunction during the package loading process. The main cause of job evasion on working place could be solved by preventing the musculoskeletal disease and improving the working environments.

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한국경찰의 직업적 성격특성에 관한 연구 (The Study on Working Personality Characteristics of Police Officer in Korea)

  • 김상균;조성호
    • 시큐리티연구
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    • 제5호
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    • pp.71-88
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    • 2002
  • This research is aimed to clarify police officer's working personality characteristics. The sample was divide in two sub-groups according to research group of career police officer and comparative group of novice police officer. The followings are list of significant tendencies. First, career police officer have aggression, cynicisms, suspicion contrast to novice police officer. Second, working personalities of aggression, cynicisms, suspicion is relationship between age, rank, service term. Findings of this study is that working personality of police officer in korea was made survey empirically, and identified change process of police officer's working personality.

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3 차원 프린팅 기술의 열간 체적 성형 공정 적용에 관한 기초 연구 - 예비형상 설계 예 및 열간 금형강으로 적층된 표면 특성 분석 (A Preliminary Study on the Application of Three-Dimensional (3D) Printing Technologies to Hot Bulk Forming Processes - Example of Preform Design and Investigation of Hot-working Tool Steel Deposited Surface)

  • 안동규;김세훈;이호진
    • 한국정밀공학회지
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    • 제31권12호
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    • pp.1093-1100
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    • 2014
  • The goal of this paper is to investigate preliminary the applicability of 3D printing technologies for the development of the hot bulk forming process and die. 3D printing technology based on the plastic material was applied to the preform design of the hot forging process. Plastic hot forging dies were fabricated by Polyjet process for the physical simulation of the workpiece deformation. The feasibility of application of Laser-aided Direct Metal Rapid Tooling (DMT) process to the fabrication of the hot bulk metal forming die was investigated. The SKD61 hot-working tool steel was deposited on the heat treated SKD61 using the DMT process. Fundamental characteristics of SKD 61 hot-working tool steel deposited specimen were examined via hardness and wear experiments as well as the observation of the morphology. Using the results of the examination of fundamental characteristics, the applicability of the DMT process to manufacture hot bulk forming die was discussed.

토공 현장관리 중심의 시공관리시스템 개발에 관한 연구 (Development of Construction Project Management System Applicable to Earth-Work Field)

  • 권오용;조재익;김도근
    • 한국건설관리학회:학술대회논문집
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    • 한국건설관리학회 2008년도 정기학술발표대회 논문집
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    • pp.301-304
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    • 2008
  • 본 연구는 토공현장의 토사관리를 중심으로 토공사에 대한 시공관리시스템 구현을 목적으로 한다. 본 연구 결과는 토공사 시공관리에 대한 DB 설계 및 시스템 구현으로 구분한다. 첫째, 토공사 시공관리에 대한 DB설계는 토공사 장비에 대한 작업계획 대비 실적의 분석을 통한 시공관리와 노무관리 등 자원관리 DB를 구성하여 작업과 자원 분류체계를 연계하여 구성하였으며, 둘째 토공사 시공관리 시스템은 토공사 작업계획을 평면도에 구획단위로 구분하여 실적을 그래픽으로 표시하며, 이를 기반으로 공정 현황, 진도보고 등폭 시각적으로 표시하여 현장의 실무자간에 의사소통 및 업무 수행에 원활히 사용하도록 개발하였다. 본 연구는 토공전문회사의 토공사 업무에 특화한 시스템으로 시험적용 단계를 거쳐서 현장에 사용 가능한 시스템이다.

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연삭 작업상태 감시 시스템 개발 (Monitoring system of the grinding working conditions)

  • 김성렬;윤덕상;김화영;안중환
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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    • pp.387-390
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    • 1997
  • Grinding process takes a long time that grinding machine is setted properly. It is difficult for user to judge correctly the abnormal states generated in grinding process. Air grinding has to be reduced for the improvement of productivity. In addition, it is important to monitor the dressing and the grinding process so that the grinding working maintains optimal grinding conditions. In this study, the monitoring system using the acoustic emission is developed to monitor these processes continuously. This system was able to reduce the preparation as well as the machine setting time in grinding operation.

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스퍼터링 공정 압력이 InZnO 박막트랜지스터의 광학 및 전기적 특성에 미치는 영향 (Effect of Sputtering Working Pressure on the Optical and Electrical Properties of InZnO Thin-Film Transistors)

  • 박지민;김형도;장성철;김현석
    • 한국재료학회지
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    • 제30권4호
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    • pp.211-216
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    • 2020
  • Amorphous In-Ga-Zn-O (a-IGZO) thin film transistors, because of their relatively low mobility, have limits in attempts to fulfill high-end specifications for display backplanes. In-Zn-O (IZO) is a promising semiconductor material for high mobility device applications with excellent transparency to visible light region and low temperature process capability. In this paper, the effects of working pressure on the physical and electrical properties of IZO films and thin film transistors are investigated. The working pressure is modulated from 2 mTorr to 5 mTorr, whereas the other process conditions are fixed. As the working pressure increases, the extracted optical band gap of IZO films gradually decreases. Absorption coefficient spectra indicate that subgap states increase at high working pressure. Furthermore, IZO film fabricated at low working pressure shows smoother surface morphology. As a result, IZO thin film transistors with optimum conditions exhibit excellent switching characteristics with high mobility (≥ 30㎠/Vs) and large on/off ratio.

평면 엔드밀의 최적 가공조건을 위한 실험계획법의 적용 (Application of Design of Experiment Optimum Working Condition in Flat End-Milling)

  • 이상재;배효준;서영백;박흥식;전태옥
    • 한국기계가공학회지
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    • 제2권3호
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    • pp.20-25
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    • 2003
  • The End-milling has been widely used in the industrial world because it is effective to cutting working with various shape. Recently the end-milling is demanded the high-precise technique with good surface roughness and rapid manufacturing time for precision machine and electronic elements. The cutting working of end-milling such as, cutting direction, revolution of spindle, feed rate and depth of cut have an effect on optimum surface roughness. This study was carried out to decide the working condition for optimum surface roughness and rapid manufacturing time by design of experiment and ANOVA. From the results of this study, the optimum working condition for end milling is upward cutting in cutting direction, 600rpm in revolution of spindle, 240mm/mm in feed rate, 2mm in axial depth of cut and 0 25mm in radial depth of cut. The design of experiment has become an useful method to select optimum working condition mend-milling.

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방전가공기의 방전 펄스 시간의 퍼지제어 (Fuzzy Control of Discharge Pulse Duration for Electrical Discharge Machinery)

  • 이제희;박호준;양직현;허욱열;이선우;안성광
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 하계학술대회 논문집 B
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    • pp.1167-1169
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    • 1996
  • As electrical discharge machinery(EDM) is industrial process which is manufactured by discharge energy, by producing discharge, EDM process finished material at the little micrometer air gap. Especially, EDM is used for the characteristic of heat-resisting material, it puts to use air-space industrial element, confusing shaping material such as jet engine, rocket elements. Working performance. is changed by environment of working, discharge current voltage and duration of discharge pulse. Evaluation of performance working is work speed, clearance smoothing of product surface, wasting of pole. In this paper, this machine is compensated by adaptive controller which corrects the weak points of classical machine which is observed and operated working condition by user in hands. The previous purpose is main object in this thesis. The adaptive controller automatically detect abnormal condition and working conditions. To improve performance, surface smoothing and working speed, the adaptive controller uses fuzzy control strategy. To evaluate performance, this controller is implemented by microprocessor i80c196 and is applied real experimental machine.

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상계해법과 유한요소법을 이용한 스피닝공정 해석에 관한 연구 (A study on the process of tube end spinning by the upper bound method and the finite element method)

  • 김전형;홍성인;이정환;이영선
    • 소성∙가공
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    • 제6권6호
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    • pp.517-526
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    • 1997
  • The purpose of this study is to investigate changes in the wall thickness of tube sinking and working forces by the upper bound method and ABAQUS code. The independent variables are ; workpiece material, original wall thickness of tube, die angle, friction, and reduction of diameter. The results indicate that these five variables are factors of the increase in wall-thickness and working forces. Three variables, a inner tube wall angle and two angles of the velocity discontinuous surfaces, are optimized in this proposed velocity field by the upper bound method. In this method, we can estimate the working forces and final tube thicknesses similar to actual forming process. Optimum process variables which are obtained by upper bound method are used in ABAQUS pre-model.

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