• 제목/요약/키워드: Machining process parameters

검색결과 271건 처리시간 0.027초

미세방전가공 중 발생하는 debris를 고려한 가공특성 연구 (Influence of Debris in Micro Electrical Discharge Machining Processes)

  • 국경훈;이희원;민병권;이상조
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2005년도 춘계학술대회 논문집
    • /
    • pp.1244-1247
    • /
    • 2005
  • The material removal mechanism of Electrical Discharge Machining (EDM) process has been studied for several decades. However, understanding of the material removal mechanism is still a difficult problem because the mechanism involves complicated physical phenomena including plasma. Especially, for a micro-EDM process, due to the influence of the debris that is generated during the machining process, quantitative modeling of EDM becomes more complex. To understand better the effects of the debris in the micro-EDM process experimentally, a new approach has been introduced in this study. Using a specially designed workpiece holder, the debris generated during the EDM with various process conditions has been collected. Then, using a simulated environment using micro-sized metal powders, the influence of the debris during the single EDM discharge has been observed. The effects of EDM process parameters on the debris size and product quality are discussed.

  • PDF

선삭 공정에서의 고능률 가공을 위한 주축 회전수의 최적화 (Spindle Speed Optimization for High-Efficiency Machining in Turning Process)

  • 조재완;강유구;김석일
    • 한국정밀공학회지
    • /
    • 제26권1호
    • /
    • pp.138-145
    • /
    • 2009
  • High-efficiency and high-quality machining has become a fact of life for numerous machine shops in recent years. And high-efficiency machining is the most significant tool to enhance productivity. In this study, to achieve high-efficiency machining in turning process, a spindle speed optimization method was proposed based on a cutting power model. The cutting force and power were estimated from the cutting parameters such as specific cutting force, feed, depth of cut, and spindle speed. The time delay due to the acceleration or deceleration of spindle was considered to predict a more accurate machining time. Especially, the good agreement between the predicted and measured cutting forces showed the reliability of the proposed optimization method, and the effectiveness of the proposed optimization method was demonstrated through the simulation results associated with the productivity enhancement in turning process

고출력 전자빔 드릴링 가공 파라미터 선정에 따른 증기화 증폭 시트의 가공 실험 및 특성 분석 (Machining experimental and characteristic analysis of vaporized amplification sheets according to selection of high-power density electron beam drilling parameters)

  • 김현정;정성택;위은찬;이주형;강준구;김진석;강은구;백승엽
    • Design & Manufacturing
    • /
    • 제14권2호
    • /
    • pp.62-68
    • /
    • 2020
  • Recently, research on precise parts required in aerospace, ship, and automobile industries has been actively conducted. In this paper, electron beam drilling machining parameters were selected and experiments were conducted to compare processing characteristics analysis according to machining parameters through machining experiments of a vaporization amplification sheet to which STS 304 was applied. Also, as a result of measuring the machining. As the thickness gradually increased, it was confirmed that the electron beam could not reach the vaporization amplification sheet and thus melted on the surface of the material. As a result of the experimental analysis, it was analyzed that the vaporization explosion reaction of the vaporization amplification sheet was not normally performed due to the working distance (WD) according to the material thickness.

알루미늄 합금 6061에서 와이어 진동부가에 의한 와이어 컷 방전가공에 따른 표면 거칠기 특성 (I) (Characteristics of Surface Roughness Based on Wire Vibration and Wire-cut Electric Discharge Machining of Aluminum Alloy 6061 (I))

  • 류청원;최성대
    • 한국기계가공학회지
    • /
    • 제14권2호
    • /
    • pp.59-66
    • /
    • 2015
  • The production of high value-added products requires efficient processing and this constant demand for complex shape processing has led to the need for hybrid processing. In this study, the surface characteristics of hybrid machining, which combines wire-cut E.D.M and vibration, are examined. The selected experimental parameters are verticality, waveform, amplitude, peak current and frequency. The experimental results provide a guideline for selecting reasonable machining parameters. Surface roughness was improved by increasing the amplitude of the vibration.

링기어 절삭을 위한 클램프 척의 응력해석 (Stress Analysis of a Clamp Chuck for Machining of a Ring Gear)

  • 심한섭;김해지
    • 한국기계가공학회지
    • /
    • 제10권3호
    • /
    • pp.73-78
    • /
    • 2011
  • This study contains to theory and analysis research for the stress and the translation of an expand disk that fix a ring gear for tooth profile machining. The stress of the expand disk is analysed by the finite element method(FEM) to calculate design parameters. From the analysis results, the stress of the expand shows a linear tendency under various fixing force. This results show that the expand disk have a elastic characteristics as a disk spring. The maximum stress was observed on under side in split section of the expand disk. It is verified that the analysis results are useful to calculate design parameters of the expand disk.

기하학적 적응제어에 의한 엔드밀링머시인의 안내면 오차 규명 (Identification of guideway errors in the end milling machine using geometric adaptive control algorithm)

  • 정성종;이종원
    • 대한기계학회논문집
    • /
    • 제12권1호
    • /
    • pp.163-172
    • /
    • 1988
  • 본 논문에서는 GAC방법을 이용하여 공작기계의 안내면오차를 수치제어 공작기계가 가지고 있는 가공조건의 조절 능력을 이용하여 가공오차를 보상제어 함으로써 규명(identification)할 수 있는 방법을 제시한다.

다구찌 방법에 의한 IED 초정밀 래핑의 최적 가공에 관한 연구 (A Study on the Optimal Machining of the IED Ultra-precision Lapping by Taguchi Method)

  • 황성철;김백겸;원종구;이은상
    • 한국공작기계학회논문집
    • /
    • 제17권4호
    • /
    • pp.29-34
    • /
    • 2008
  • Application of ceramic has increased due to excellent mechanical properties, and machining of ceramic has demanded gradually a precision surface machining. For decreasing the surface roughness, the control of IED lapping parameters is very important. This paper deal with the analysis of the process parameters such as applied forces, percentage of h-BN and IED lapping time, developed based on Taguchi method. Also, SEM was used for monitoring of a machinable ceramic surface.

열 공구를 이용한 쾌속 폼 가공 공정 개발에 관한 연구 (A study of development of Rapid Foam Shaping process using hot tool)

  • 김효찬;이상호;송민섭;양동열;박승교
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2004년도 추계학술대회 논문집
    • /
    • pp.55-59
    • /
    • 2004
  • Recently, life cycle and lead-time of products have been shortened with the demand of customers. Therefore, it is important to reduce time and cost at the step of manufacturing trial molds. In order to realize three dimensional shape on CAD, the machining process has been widely used because it offers practical advantages such as precision and versatility. However, traditional machining process spends a lot of time in cutting product and the remained material causes trouble such as inconvenience for clean. In this work, a new machining process using the hot tool has been proposed to overcome those limitations. In the process, the hot tool moves the predetermined path and the heat of the tool decomposes the remained material. In order to set up the process, the hot tool to satisfy requirements is designed and the material thermal properties are obtained using the DSC and TGA machine. The relationships between process parameters and thermal radius of the tool are obtained through experiment.

  • PDF

엑사이머 레이저 어블레이션 가공에서의 빔변수의 영향 (Effects of Beam Parameters on Excimer Laser Ablation)

  • 방세윤
    • 한국정밀공학회지
    • /
    • 제22권7호
    • /
    • pp.38-46
    • /
    • 2005
  • In laser machining such as drilling with $CO_2$ or Nd:YAG laser, and etching or ablation with Excimer laser, one of the most important parameters affecting the machining is known to be beam characteristics. In this paper a numerical study is performed to investigate the effects of beam parameters, especially in the process of excimer laser ablation of polymers. Results of different beam conditions reveal that if the ablated depth is small compared to beam size the simple photochemical etching model is suitable to predict the etched shape, and that the importance of precise alignment becomes large as beam quality factor becomes larger.

최적형상의 고속용 엔드밀 설계를 위한 프로그램 개발 (Development of the program for Optimal Design of High Speed Endmill)

  • 고성림;한창규;서천석;김경배
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 2003년도 춘계학술대회 논문집
    • /
    • pp.500-503
    • /
    • 2003
  • The tool geometry parameters and cutting process have complex relationships. Until now, various cutting test were needed to acquire optimal design of end mill for the purpose of high speed machining, due to the insufficient knowledge about cutting process in high speed machining. Using various tools with different geometry, relationships between tool geometry parameter (rake angle, clearance angle, length of cutter) and cutting process (cutting force, surface accuracy, surface roughness) have been studied. Acquired data can be used to design optimal tool for high speed machining

  • PDF