• Title/Summary/Keyword: High-Efficiency Machining

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Advanced Machining Technology for Die Manufacturing (금형의 고정도ㆍ고능률 가공기술)

  • 김정석;이득우;정융호;강명창;이기용;김경균;김석원
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.4
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    • pp.48-68
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    • 2000
  • The high-speed machining technology of difficult-to-cut material is needed to achieve the high-efficiency of die manufacturing. The high-speed machining is applied in automobile, airplane and electricityㆍelectro industry etc, because it can improve machining efficiency and productivity with high speed, high power and high rotation. In this study, high speed machinability, tool wear characteristics and its monitoring, characteristics of damaged layer, machinability of difficult-to-cut material, characteristics of a free curved surface and method of CAD/CAM system were introduced to acquire the shortening of machining time, the improvement of machining efficiency and the high quality of machined surface. Therefore, we establish the stabilization condition of difficult-to-cut material machining and present the optimal cutting condition for high-efficiency cutting.

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Die and Mold Making for Connecting Rod Parts through High Speed Machining (고속가공을 통한 커넥팅 로드용 금형 가공)

  • 임유업;김정석;강명창;이득우;정융호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.926-929
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    • 2000
  • Recently, there are lots of applications in machining dies using CAD/CAM systems. which results in reduction of machining time and rising of machining efficiency applying high speed machining and high quality machining. Investigation of machinability is necessary in order to apply high speed machining. In machining complicate 3D model such as connecting rod die. the need of high speed machine and coated tool is requested recently in this field. This paper introduce the database of high speed machining to improve machining efficiency of connecting rod die.

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Research on High-Efficiency Machining through Bottom-up Machining using CAD/CAM System (CAD/CAM시스템을 이용한 상향식 가공에 의한 고효율가공에 관한 연구)

  • Jeong, Dae Hoon;Han, Kyu-Taek
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.11
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    • pp.89-95
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    • 2019
  • In this research, the effect of roughing on tool load through bottom-up machining is investigated through actual machining. Generally, through the use of high-speed machining technology, machining methods, such as general roughing, operate by deepening the cutting depth for as long as the tool is able to withstand it, giving a slower feed rate, less cutting depth, and faster feed. However, when the cutting depth is deep, there is a problem in that the stepped shape of the cutting area is increased (e.g., by the shaking of the tool or the chipping load). However, if the cutting is performed less, the cutting time becomes relatively long. To compensate for these drawbacks and extend the service life of the tool, economic efficiency needs to be secured.

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

  • Chol, Jae-Wan;Kang, You-Gu;Kim, Seok-Il
    • Journal of the Korean Society for Precision Engineering
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    • v.26 no.1
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    • pp.138-145
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    • 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

Determination of the Cutting Condition in High Speed-Machining Considering the Machining Efficiency (볼 엔드밀의 고속가공에서 가공능률을 고려한 가공조건의 선정)

  • 손창수;강명창;이득우;황경현
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.965-969
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    • 1997
  • Due to the high feed rate,high speed machining (HSM) provide a great potential of rationalization for the machining Dies and Moulds. But determination of cutting condition is very difficult, because cutting mechanism of high speed machining is very complicated,especially using ball end-mill. This paoer gives a report on selection of the optimal cutting condition to improve the machining efficiency, And optimal machining condition is determined through the cutting force, FFT analysis of cutting force and surface roughness according to the cutting condition. Based on this experiment result,wear process and machining characteristics are evaluated.

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Machining Technology of Scroll shape by Feed control method (이송속도 제어를 통한 스크롤 형상의 가공기술)

  • 심상우;강명창;김정석;정현출
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1999.05a
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    • pp.123-127
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    • 1999
  • This paper suggests the establishment of high-accuracy and high-efficiency machining method of scroll shape workpiece by using the feed control method. The cutting paths for machining the inside and outside surfaces of the scroll-shape workpiece are calculated, and the calculation method of the cutting chip areas based on the coordinate of the base circle is shown. A feed control method is proposed for a constant cutting area and cutting force. By machining test of scroll shape workpiece, The machined accuracy of wrap, tool wear, and surface roughness are evaluated. By this method, Reduction of the machining time and large increase of the efficiency can be expected.

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Ultrasonic Vibration Machining of Inconel (초음파 진동 부가에 의한 인코넬의 선삭가공)

  • Park, Myung-Ho
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.3
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    • pp.357-362
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    • 2003
  • Recently, the demand for advanced technology of high precision and high efficiency processing of hard materials such as inconel is increasing with progress of industrial goods. However, the machinability of inconel is very inferior to the other conventional industrial materials and the machining technology for inconel involves many problems to be solved in machining accuracy, machining efficiency, etc. Therefore it is needs to establish the machining technology. The purpose of this study is to develop an advanced ultrasonic vibration machining technology for inconel, using the 60KHz and 75KHz high frequency, amplitude about 8${\mu}{\textrm}{m}$ and 4${\mu}{\textrm}{m}$, respectively. As the result, this new ultrasonic vibration machining is reasonable and suitable for the high efficient. accuracy machining method of inconel.

Relationship between Shape Recovery Characteristics & Electro Chemical Machining of Ni-Ti Shape Memory Alloy (Ni-Ti 형상기억합금의 전해가공과 형상복원 특성의 관계)

  • 최영수;박규열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.1097-1100
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    • 2001
  • In this paper, the electro-chemical-machining characteristics of Ni-Ti Shape Memory Alloy(SMA) was investigated. From the experimental results, the optimal electro chemical machining conditions for satisfying the machining quality(fine surface & high recovery stress) might be confirmed. And it was concluded that optical electro chemical condition for Ni-Ti SMA could be obtained at approximately 100% current efficiency and high frequency pulse current.

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A Study on the Effect of Dimensional Errors and Roundness in High Speed Cylindrical Machining Al-alloy (Al합금의 고속 원통가공에서 발생하는 치수오차와 진원도의 영향 고찰)

  • 윤종학;서성원;이헌철
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.5
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    • pp.17-24
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    • 2001
  • Recently, the requirements for high precision and efficiency machining are gradually increased to raise international competitiveness at the industrial fields of die and molds. This trend had made effects on the industrial fields in Korea and which needs fur studying of high precision and efficiency machining. This study is to investigate the effects of the non-out of end mill in the external cylindrical machining operated by solid carbide end mills with Al-alloy in high speed machining center relating to high spindle revolution and frost fred per minute on the dimensional precision, roundness of workpiece. From the results of experimentations followings are obtained; when Al-alloy is processed by the external cylindrical cutting of end milling through the high speed revolution, if the spindle revolution is higher relating to radial depth of cut, feed per tooth in very lower situation, finally, productivity can be raised because high precision and quality products are machined high efficiently.

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ECM Characteristics of Ni-Ti Shape Memory Alloy (Ni-Ti 형상기억합금의 전해가공의 특성)

  • 김동환;강지훈;박규열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.955-958
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    • 2000
  • In this paper, the electro-chemical-machining characteristics of Ni-Ti Shape Memory Alloy(SMA) was investigated. From the experimental results, the optimal electro chemical machining conditions for satisfying the machining quality(fine surface & high recovery stress)might be confirmed. And it was concluded that optical electro chemical condition for Ni-Ti SMA could be obtained at approximately 100% current efficiency and high frequency pulse current.

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