• Title/Summary/Keyword: flat endmill

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Study on the development of multi-tasking 5-axis machining for insert type milling cutter (인서트형 밀링커터의 복합5축가공 기술개발에 관한 연구)

  • 황종대;정윤교
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2004.04a
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    • pp.21-26
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    • 2004
  • This research presents a modeling and a manufacturing method of insert type milling cutters such as face cutter, flat endmill and ball endmill. The methods introduced in this paper adopts the multi-tasking 5-axis machining that is increasing machining accuracy of holder and position accuracy of bolting points. So this can be used in the basic document of the total package program that involves modeling and manufacturing module in various insert cutters.

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Performance Evaluation of Endmill in High Speed Machining (고속가공용 엔드밀의 성능평가)

  • 이정무;김건주;정윤교
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.324-328
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    • 2002
  • Recently, in machining industry much progress has been made by taking advantage of high speed machining. On the other hand as disadvantage high speed machining involves shortening the life of cutting tool. In this research we want to evaluate the performance of appropriate endmill for high speed machining in accordance with surface roughness of land width and clearance angle of flat-endmill

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Regrinding Effect of Flat End-Mill Tool for Recycling of Tungsten Carbide (WC-Co) Material (초경소재 재활용을 위한 플랫 엔드밀공구의 재연삭 효과)

  • Kang, Myung-Chang;Kim, Min-Wook;Kwon, Dong-Hee;Park, In-Duck;Jeong, Young-Keun
    • Korean Journal of Materials Research
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    • v.18 no.12
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    • pp.635-639
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    • 2008
  • In this paper, experimental studies of the regrinding of tungsten carbide (WC-Co) tools for high-speed machining were conducted. Regrinding and a subsequent evaluation test were carried out for a flat endmill tool with diameters of 10 mm and 3 mm using a CNC five-axis tool grinder and a CNC three-axis machining center. Tool wear on the two types of endmill tools increased as the cutting length increased, and the tool wear was not influenced by the regrinding state. In case of the micro endmill with a tool diameter of 3 mm, the effective regrinding time was determined for a flank wear threshold of 0.3 mm considering the tool life according to cutting length. The tool lives of the 10 mm and 3 mm endmill tools were increased by 80% and 72%, respectively. This conclusion proves the Feasibility of the recycling of tungsten carbide materials in the high-speed machining of high-hardened materials for industrial applications.

Acoustic Emission and Burr Comparison of Circular Sawing and Milling in Fiber Reinforced Plastic Cutting (원형 톱과 엔드밀의 복합재료 절단 음향과 버 비교연구)

  • Joo, Chang-Min;Baek, Jong-Hyun;Kim, Su-Jin;Lee, Gun-Myung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.21 no.7
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    • pp.98-104
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    • 2022
  • Circular sawing and milling are general machining processes used for routing fiber-reinforced plastics (FRP). In this study, the productivity and cutting quality of a circular saw and flat endmill were compared. As a result, the productivity of the circular saw was approximately ten times higher than that of the endmill for the same tool life, and the burr size of the circular saw was 14 times smaller than that of the flat-end mill. The spectrogram analysis of the cutting sound also showed that the acoustic emission of the circular saw was more uniform than that of the flat end mill. Circular sawing is thus a more suitable process for the straight cutting of pultrusion FRP than a flat endmill.

Comparison of precision Machinabilities and Cutting Time in Inclined Milling Process (노우즈반경에 따른 엔드밀의 가공특성 및 절삭시간의 비교)

  • 김병희;최영석;주종남
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.9
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    • pp.2114-2121
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    • 1995
  • Surface generation model of three types of endmills is introduced to analyse the cutting mechanism of an endmill more accurately. Superposition method is introduced to define the effective cusp including the effects of cutter mark. Through the comparison of three endmills, it is shown that the ball-nose endmill is superior to the ball endmill and the flat endmill for inclined milling process in 3-or 5-axis machining modes. By using the objective function minimizing the machining time, appropriate nose radius is selected for various cutter radiuses and cutter inclination angles.

Evaluation of Tool Wear of P/M High Speed Steel Flat Endmill (분말 고속도공구강 평엔드밀의 공구마멸 평가)

  • Jung, Ha-Seung;Ko, Tae-Jo;Kim, Hee-Sool;Bae, Jong-Soo;Kim, Yong-Jin
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.4
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    • pp.154-160
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    • 2002
  • Powder metallurgy(P/M) process has been used for the production of high performance high-speed steels. P/M high speed steel has more uniform and fine microstructure than those of conventional wrought products. Therefore, it offers distinct advantages over conventional tool steels. The superior uniformity of composition and fine microstrucure lead to excellent toughness and less distortion during heat treatment, which in turn can reduce total grinding costs and provides other benefits, such as uniform hardness and increased tool life. From these reasons, milling, hole machining, broaching, and gear manufacturing tools are major applications of P/M high-speed steels. In this research, we evaluated tool wear of flat endmill which is made of P/M high-speed steel from the view point of cutting tool performance.

Toolpath Generation for Three-axis Round-end Milling of Triangular Mesh Surfaces (삼각망 곡면의 3축 라운드엔드밀 가공을 위한 공구경로 생성)

  • Chung, Yun-Chan
    • Journal of the Korean Society for Precision Engineering
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    • v.26 no.2
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    • pp.133-140
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    • 2009
  • Presented in this paper is a method to generate round-endmill toolpaths for sculptured surfaces represented as a triangular mesh model. The proposed method is applicable in toolpath generation for ball-endmills and flat-endmills because the round-endmill is a generalized tool in three-axis NC (numerical control) milling. The method uses a wireframe model as the offset model that represents a cutter location surface. Since wireframe models are relatively simple and fast to calculate, the proposed method can process large models and keep high precision. Intersection points with the wireframe offset model and a tool guide plane are calculated, and intersection curves are constructed by tracing the intersection points. The final step of the method is extracting regular curves from the intersection curves including degenerate and self-intersected segments. The proposed method is implemented and tested, and a practical example is presented.

Development of Improved Cutting Force Model for Indexable End Milling Process. (인덱서블 엔드밀링 공정을 위한 향상된 절삭력 모델의 개발)

  • 김성준;이한울;조동우
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.237-240
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    • 2004
  • Indexable end mills, which consist of inserts and cutter body, have been widely used in roughing of parts in the mold industry. The geometry and distribution of inserts on cutter body are determined by application. This paper proposes analytical cutting force model for indexable flat end-milling process. Developed cutting force model uses the cutting-condition-independent cutting force coefficients and considers runout, cutter deflection and size effect for the accurate cutting force prediction. Unlike solid type endmill, the tool geometry of indexable endmill is variable according to the axial position due to the geometry and distribution of inserts on the cutter body. Thus, adaptive algorithm that calculates tool geometry data at arbitrary axial position was developed. Then number of flute, angular position of flute, and uncutchip thickness are calculated. Finally, presented model was validated through some experiments with aluminum workpiece.

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Machining characteristic of gray cast iron in high speed machining with tungsten carbide endmill (초경 엔드밀에 의한 회주철(GC250)의 고속가공 특성(1))

    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.147-150
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    • 1995
  • High speed machining one of the most effectiv to improve machining accuracy and product in dies and mould. But a study on this is limited to Alumium, light metal etc. This paper presents machining characteristic of gray cast iron in high speed machining with tungsten carbide endmill. It is suggested to measure sutting force, tool wear, surface roughness, surface shape and select of cptimal cutting condition in the high speed machining of gray cast iron. Performance of high speed machine tool was estimated and the relationship between cutting phenomenon and machinabillity was described.

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