• 제목/요약/키워드: Burr formation

검색결과 87건 처리시간 0.038초

유한요소법을 이용한 버 형성 예측 모듈의 개발 (Development of a Module to Predict Burr Formation Using the Finite Element Method)

  • 고대철;고성림
    • 한국정밀공학회지
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    • 제17권10호
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    • pp.170-179
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    • 2000
  • The objective of this study is to develop an analytical module for the prediction of burr formation during cutting process using the finite element method. This module is based on the rigid-plastic finite element method, ductile fracture criterion, fracture propagation technique and node separation criterion. The sequence of burr formation from burr initiation through end of burr formation is simulated and investigated by this module. The effect of material properties, such as AL6061-T6, AL2024-T4 and Copper, and cutting condition, such as rake angle and cutting depth, on burr formation is also discussed in this study. To validate this module the analysis results are compared with experimental ones.

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경사진 출구면에서 드릴 버 형성에 관한 실험적 고찰 (Burr formation experiment in drilling on the inclined exit surface)

  • 김병권;고성림
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2005년도 춘계학술대회 논문집
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    • pp.1253-1256
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    • 2005
  • An Experiment was carried out to study burr minimization in drilling on the inclined exit surface. Several different drills, exit surface angles and cutting conditions were selected to determine their influences on burr formation. In drilling operation, there are not only flat exit surfaces but also inclined exit surfaces which is described as inclination angle. Inclination of exit surface causes a quiet different burr formation when comparing with flat surface. Burr formation mechanisms are analyzed according to the drill geometries and cutting conditions. Several schemes for burr minimization on inclined exit surface were proposed. Burr geometry in each drill and cutting condition are measured by laser measurement system.

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유한요소법을 이용한 절삭가공 Burr 예측과 생성특성 연구 (Burr Prediction via Finite Element Method and Burr Formation Characteristics in Metal Cutting Process)

  • 황준;황덕철;우창기;양계준
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.1000-1003
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    • 2001
  • This paper presents the numerical analysis and experimental verification to know the metal cutting burr formation mechanism in face milling operation. Finite element method are applied to predict the 2-D burr formation process prediction. Face milling process are adjusted to analyze the characteristics of burr shapes according to various cutting conditions. The cutting parameters were investigated with cutting speed, feed rate, depth of cut. Through the experiments various burr types are classified according to its shape and properties.

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2차원절삭에서 공구이탈시 발생하는 버(Burr)와 파단에 관한 연구 (Study on the Burr Formation and Fracture at the Exit Stage in Orthogonal Cutting)

  • 고성림
    • 대한기계학회논문집
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    • 제17권5호
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    • pp.1172-1182
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    • 1993
  • 본 연구에서는 버형성중의 파단을 파단전의 소성변형의 과정이 파단에 영향을 미치는 연성파단(ductile fracture)으로 간주하여 McClintock의 연성파단에 관한 모델 을 이용하여 버형성중의 파단변형도를 얻었다. 이 파단변형도가 인장시험으로부터 얻 은 파단변형도와 커다란 오차가 없음을 확인하여 편의상 인장시험에서의 파단변형도를 버형성중의 파단발생 판정기준으로 사용하였다. 버형성이 시작된 이후에 공구인선부 에서의 피삭재의 변위의 발달에 관한 모델이 제시되었고 파단변형도와 최대변형량과의 비교로부터 파단위치와 각도가 결정된다.

헬릭스각이 버형성에 미치는 영향 (Effects of the Helix Angle on the Burr Formation)

  • 맹민재
    • 한국생산제조학회지
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    • 제9권4호
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    • pp.68-74
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    • 2000
  • Even in a fully automated factory, many deburring operations are carried out manually . To remove or minimize the burreffectively or automatically, understanding of the burr formation which occur at the exit stage of machining is necessary. Burrs can be formed on the feed mark ridges an the edges of the machined parts in machining operations. These burrs are underirable in terms of the surface quality, the precise dimensioning of the machined parts and the safety of operators. This paper demonstrates the effectiveness of using end mill tool on minimizing the exit burr formation in machining . In particular, the experimental relationships between the size of exit burr and the cutting parameters are established in end mill machining . Methods to control the size of exit burr are then explained.

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밀링가공시 버형성 예측을 위한 전문가 시스템 개발 (Development of Expert System for Burr Formation in Face Milling)

  • 고성림;김영진;고대철;한상우;이제열;안용진
    • 한국정밀공학회지
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    • 제18권2호
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    • pp.199-205
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    • 2001
  • Burr makes troubles on manufacturing process due to deburring cost, quality of products and productivity. This paper described the results of experimental study on the influence of the cutting parameters on the formation of exit burrs in face milling. Using the results of experimental study, burr types are classified and data bases are developed to predict burr formation result. From the CAD file for work geometry and the NC data for tool path, the exit angles are calculated at every edges. This program predicts the burr geometry at exit edges using the prediction algorithm and data bases which are developed experimentally. Simulation results on deformation strain and temperature are also available in specific 2-dimensional cutting conditions. Also algorithm which can determine the exit angle is proposed.

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미소구멍 가공시 버형성 특성 분석 및 DB구축 (Characterization of Burr Formation and DB Construction in Micro Drilling)

  • 박대흠;고성림
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2003년도 춘계학술대회 논문집
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    • pp.1780-1783
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    • 2003
  • Burrs formed in micro drilling with Ø 1.0 and 0.5 are observed. The changes of burr geometry are compared when feed rate and velocity changes. Characteristics of burr formation in 4 different workpiece materials are analyzed. The coefficient of burr geometry, CB is introduced to classify burrs according to burr height and burr types. Finally control charts are produced using the coefficient of burr geometry and burr types in each workpiece material. Data base is constructed to be used for burr expert system.

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미소 드릴링시의 Burr 형성에 관한 연구 (A Study on the Burr Formation of Miniature Drilling process)

  • 박동삼
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1997년도 춘계학술대회 논문집
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    • pp.6-11
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    • 1997
  • In most machining operations, undesirable burr are formed on the edge of the workpiece adjacent to the machined surface. Such burrs are often the cause of various problems during automatic maching process. Therefore, it is very important to know characteristics of burr formation in maching process. This paper describes characteristic of exit burrs generated during miniature drilling process. In particular, the effect of spindle speed, feedrate and drill diameter on burr formaton is investigated. The result showed that exit burr height increased significantly with increasing feedrate.

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칩브레이커 사용에 따른 밀링버의 생성특성 연구 (Burr Formation Characteristics due to Chip Breaker in Milling Process)

  • 황덕철;황준;우창기
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
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    • pp.78-82
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    • 2001
  • This paper presents the numerical analysis and experimental verification to know the metal cutting burr formation mechanism in face milling operation. Finite element method are applied to predict the 2-D burr formation process prediction. Face milling process are adjusted to analyze the characteristics of burr shapes according to various cutting conditions. The cutting parameters were investigated with cutting speed, feed rate, depth of cut. Through a few experiments, various burr types are classified according to its shape and properties.

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새로운 개념의 드릴에 의한 구멍가공시 버 형성에 관한 연구 (Analysis on Burr Formation in Drilling with New Concept Drill)

  • 고성림;전근배;이징구
    • 한국정밀공학회지
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    • 제17권3호
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    • pp.114-121
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    • 2000
  • A new concept drill was developed recently (or increasing accuracy and productivity in drilling operation. The burr formation in drilling causes many problems in deburring operation because burrs are formed inside holes and it is difficult to remove them. Burr formations are observed in drilling operation with a new concept drill and are compared with conventional HSS drill. Several workpieces with different materials are drilled with several cutting conditions, velocity and feed rate. The burr in drilling can be classified into three types according to the location of crack. To observe the burr formation mechanism, the cap which is formed with the new concept drill is observed and measured.

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