• 제목/요약/키워드: End milling process

검색결과 257건 처리시간 0.025초

엔드밀 가공시 동적 절삭력 모델에 의한 절삭력 및 표면형상 예측 (The Prediction of Cutting Force and Surface Topography by Dynamic Force Model in End Milling)

  • 이기용;강명창;김정석
    • 한국정밀공학회지
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    • 제14권4호
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    • pp.38-45
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    • 1997
  • A new dynamic model for the cutting process inb the end milling process is developed. This model, which describes the dynamic response of the end mill, the chip load geometry including tool runout, the dependence of the cutting forces on the chip load, is used to predict the dynamic cutting force during the end milling process. In order to predict accurately cutting forces and tool vibration, the model which uses instantaneous specific cutting force, inclueds both regenerative effect and penetration effect, The model is verified through comparisons of model predicted cutting force with measured cutting force obtained from machining experiments.

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Cusp 패턴 조정과 미소 볼엔드 밀링을 이용한 3차원 자유곡면의 다듬질 (Finishing of Scupltured Surface through Cusp Pattern Control and Micro-ball End Milling)

  • 심층건;양민양
    • 한국정밀공학회지
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    • 제11권1호
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    • pp.177-183
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    • 1994
  • The ball-end milling process is widely used in the die/mold industries, and it is very suitable for the machining of free-from surfaces. However, cusps(or scallops) remaining at the machined part along the cutter paths require anothe finish process such as polishing or grinding. In this study, a high sped micro ball-end milling method has been suggested for the finish of free- form surfaces. A new tool path which makes the geometrical roughness of workpiece be constant through the machined surface has been developed. In the high speed machining of micro ball-end muling experimets, the developed tool paths have been successfully applied. And it was concluded that the surface roughness from this finish cuts of micro ball-end milling process was acceptable.

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실험계획법을 이용한 엔드밀 가공시 주축 진동에 대한 정량적 분석 및 수학적 모형 (Quantitative Analysis and Mathematical Model for Spindle Vibration of the End-Milling by Design of Experiment)

  • 박흥식;이상재;배효준;진동규;김영희
    • 한국기계가공학회지
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    • 제3권4호
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    • pp.37-42
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    • 2004
  • End-milling have been widely used in aircraft, automobile part and moulding industry. However, various working factors such as spindle speed, feed rate and depth of cut in end-milling have an effect on spindle vibration. There it is demanded the quantitative analysis of spindle vibration in order to get the optimum surface roughness. This study was carried out to analyze an influence of working factors on spindle vibration by design of Experiment. The results are shown that mathematical model of regression equation for an influence of working factors on vibration acceleration of spindle in end-milling by regression analysis is presented.

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공구 공작물간의 상대변위를 고려한 엔드밀링의 절삭공정 모델링 (Cutting Process Modeling of End-Milling in a Closed-Loop Configuration)

  • 황철현;조동우
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.1059-1062
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    • 1995
  • In cutting system, relative displacement between rool and workpiece is very important. Even though there have been so many works for modeling cutting process of end-milling, most of them have considered only one displacement of either tool or workpiece instead of both. In this paper, the relative displacement between tool and workpiece is considered for modeling cutting process of end-milling using simple experimental modal analysis and cutting force simulation program is developed. In cutting force model, instantaneous uncut chip thickness model is used and Runge-Kutta method is used for the simulation of time varying cutting system.

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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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볼엔드밀 절삭가공에서 전해복합의 효과 (Effect of Compounding Electrolytic Machining in Ball End Milling)

  • 주종길;박규열
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.1025-1028
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    • 2001
  • In this report, a new method compounding the electrolytic machining with ball end milling process to increase the machining efficiency was introduced. From the experimental result, it was confirmed that effect of cutting force reduction and finer surface roughness can be obtained in a certain condition of ball end milling and electrolytic machining conditions.

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볼엔드밀 절삭에서 전해복합에 의한 표면거칠기 특성 (Characteristics of Surface Roughness by Compounding Electrolytic Machining in Ball End Milling)

  • 이영표;박규열
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2000년도 추계학술대회 논문집
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    • pp.959-962
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    • 2000
  • A new method compounding the electrolytic machining with ball end milling process to improve machined surface toughness was examined. From this study, it was confirmed that much smaller cutting force and finer surface roughness can be obtained in a certain condition of ball end milling and electrolytic machining conditions.

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An innovative CAD-based simulation of ball-end milling in microscale

  • Vakondios, Dimitrios G.;Kyratsis, Panagiotis
    • Advances in Computational Design
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    • 제5권1호
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    • pp.13-34
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    • 2020
  • As small size and complex metal machining components demand increases, cutting processes in microscale become necessary. Ball-end milling is a commonly used finishing process, which nowadays can be applied in the microscale size. Surface quality and dimensional accuracy are two basic parameters that affect small size components in their assembly and functionality. Thus, good quality can be achieved by optimizing the cutting conditions of the procedure. This study presents a 3D simulation model of ball-end milling in microscale developed in a commercial CAD software and its optical and computing results. These carried out results are resumed to surface topomorphy, surface roughness, chip geometry and cutting forces calculations that arising during the cutting process. A great number of simulations were performed in a milling machine centre, applying the discretized kinematics of the procedure and the final results were compared with measurements of Al7075-T651 experiments.

볼 엔드밀을 이용한 고속가공에서 금형제품의 형성가공 특성파악 (Evaluation on Shape Machining of Dies and Molds in High speed Machining using Ball-End Milling)

  • 김경균;강명창;김정석
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.143-146
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    • 1995
  • Due to the recent growth of die/mold machining industry, demands for the high-precision and the high0quality of die product are increasing rapidly. Free surfaces of die/mold are often manufactured using the ball-end milling process. It is difficult to find the cutting condition of the ball-end milling process due to the free form machining for the various tool paths on inclined surface.

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밀링 공구의 코팅 조건이 절삭력 증가율에 미치는 영향 (The effect of coating condition of milling cutter on cutting force increase rate)

  • 문창성;김준현;최석우;김주현
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
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    • pp.95-100
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    • 2001
  • Recently, coated milling cutters are widely used for improving the productivity of cutting processes through high speed cutting and longer tool life. In metal cutting, cutting force increase rate is important factor to diagnose the cutting conditions because the amount of tool wear directly influences the cutting forces. As the cutting length increases, the worn cutter increases the cutting forces. In this study, the effect of coating process of end milling cutter on the cutting performance, especially on the cutting force increase rate, is investigated. The results acquired through the cutting test measuring cutting force increase rate show that not only the injection quantity of $N_2$ and Ar but also mean temperature influence the cutting force increase rate during the end milling process.

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