• Title/Summary/Keyword: Cutting Force Optimization

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NC Code Optimization Based on an Improved Cutting Force Model (향상된 절삭력 모델 기반의 NC 코드 최적화)

  • 이한울;고정훈;조동우
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.37-42
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    • 1997
  • Off-line feed rate scheduling is an advanced methodology to automatically determine optimum feed rates for the optimization of NC code. However, the present feed rate scheduling systems have lim~tations to generate the optimized NC codes because they use the material removal rate or non-generalized cutting force model. In this paper, a feed rate scheduling system based on an improved cutting force model that can predrct cutting forces exactly in general machining was presented. Original blocks of NC code were divided to small ones with the modified feed rates to adjust the peak value of cutting forces to a constant vale. The characteristic of acceleration and deceleration for a given machrne tool was considered when off-line feed rate scheduhng was performed. Software for the NC code optimization was developed and applied to pocket machining simulation.

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Study to Reduce Process Cycle Time and to Improve Surface Roughness of a Mobile Phone Unibody Case through Cutting Force Optimization (절삭력 최적화를 통한 핸드폰 Unibody Case 가공 싸이클 타임 단축 및 표면 조도 향상에 관한 연구)

  • Lee, Seung-Yong;Choi, Hyun-Jin;Lee, Jong-Chan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.3
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    • pp.119-124
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    • 2017
  • Machining optimization using typical computer-aided manufacturing (CAM) software mainly depends on tool paths, and it is impossible to predict the behavior of material or cutting force. In this paper, cutting force analysis simulation is performed on the Unibody Case of a mobile phone with the aim of optimizing cutting-force-based machining using the Third Wave Systems' AdventEdge Production Module. Machining time after optimization was shortened by 42% for roughing compared to pre-optimization, and actual machining time was reduced by 36.8%. For finishing, machining time was reduced by 92%, and actual machining time was reduced around 90%. A surface roughness analysis found that the post-optimization surface roughness was $1.16{\mu}m$ Ra, compared to a pre-optimization value of $1.75{\mu}m$ Ra.

A Study on Guide System for Optimization of Machining Process (기계가공 최적화를 위한 가이드시스템에 관한 연구)

  • Choi, Jong-Geun;Yang, Min-Yang
    • Journal of the Korean Society for Precision Engineering
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    • v.6 no.4
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    • pp.71-83
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    • 1989
  • The optimization in the machining process has been a long-standing goal of the manufacturing community. The optimization is composed of two main subjects;one is to select an optimum cutting condition, and the other is to detect the emergency situation and take necessary actions in real-time base. This paper proposes a reliable and practical guide system whose purpose is the optimization of cutting conditions, and the detection of tool failure in the machining process. The optimal cutting conditions are determined through the estimation of tool wear rate and the establishment of access- ible field from the measured cutting temperature and force. Tool breakage is detected by the normal force component acting on minor flank face extracted from on-line sensed feed force and radial force. In experiments, the proposed guide system has proved availability for the decision of reliable cutting conditions for the given tool-work system and the detection of tool breakage in ordinary cutting environments.

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Feed Optimization for High-Efficient Machining in Turning Process (선삭 공정에서의 고능률 가공을 위한 이송량의 최적화)

  • Kang, You-Gu;Cho, Jae-Wan;Kim, Seok-Il
    • Proceedings of the KSME Conference
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    • 2007.05a
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    • pp.1338-1343
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    • 2007
  • High-efficient machining, which means cutting a part in the least amount of time, is the most effective tool to improve productivity. In this study, a new feed optimization method based on the cutting power regulation was proposed to realize the high-efficient machining in turning process. The cutting area was evaluated by using the Boolean intersection operation between the cutting tool and workpiece. And the cutting force and power were predicted from the cutting parameters such as feed, depth of cut, spindle speed, specific cutting force, and so on. Especially, the reliability of the proposed optimization method was validated by comparing the predicted and measured cutting forces. The simulation results showed that the proposed optimization method could effectively enhance the productivity in turning process.

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Feed Optimization Based on Virtual Manufacturing for High-Efficiency Turning (고능률 선삭 가공을 위한 가상 가공 기반의 이송량 최적화)

  • Kang, You-Gu;Cho, Jae-Wan;Kim, Seok-Il
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.31 no.9
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    • pp.960-966
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    • 2007
  • High-efficient machining, which means to machine a part in the least amount of time, is the most effective tool to improve productivity. In this study, a new feed optimization method based on virtual manufacturing was proposed to realize the high-efficient machining in turning process through the cutting power regulation. The cutting area was evaluated by using the Boolean intersection operation between the cutting tool and workpiece. And the cutting force and power were predicted from the cutting parameters such as feed, depth of cut, spindle speed, specific cutting force, and so on. Especially, the reliability of the proposed optimization method was validated by comparing the predicted and measured cutting forces. The simulation results showed that the proposed optimization method could effectively enhance the productivity in turning process.

Optimization of Cutting Force for End Milling with the Direction of Cutter Rotation (엔드밀가공에서 커터회전방향에 따른 절삭력의 최적화)

  • Choi, Man Sung
    • Journal of the Semiconductor & Display Technology
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    • v.16 no.2
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    • pp.79-84
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    • 2017
  • This paper outlines the Taguchi optimization methodology, which is applied to optimize cutting parameters in end milling when machining STS304 with TiAlN coated SKH59 tool under up and down end milling conditions. The end milling parameters evaluated are depth of cut, spindle speed and feed rate. An orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) are employed to analyze the effect of these end milling parameters. The Taguchi design is an efficient and effective experimental method in which a response variable can be optimized, given various control and noise factors, using fewer resources than a factorial design. An orthogonal array of $L_9(33)$ was used. The most important input parameter for cutting force, however, is the feed rate, and depending on the cutter rotation direction. Finally, confirmation tests verified that the Taguchi design was successful in optimizing end milling parameters for cutting force.

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A Study on the Improvement of Productivity and Surface Roughness in Mold Machining using the Optimization of Cutting Force (절삭력 최적화를 이용한 금형의 생산성 및 표면조도 향상에 관한 연구)

  • Jeon, Eon-Chan;Lee, Su-Yong;Lee, Woo-Hyun;KIm, Dong-Hoo;Chun, Jung-Do
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.6
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    • pp.824-829
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    • 2011
  • The mold is widely used for mass production in present industry. Also, product cycle time is faster, for this request, high productivity improvement in mold machining is required. And, In case of mold manufacturing company, the delivery shortening is required to quickly manufacture new product. Therefore, we aim for the delivery shortening though the method of machining time shortening in mold machining. On this paper, first, we made the NC-code of Insert die-casting as the object model using PowerMill. And then, analyzed cutting force by Toolpath in Insert mold machining using Production Module of Advantedge which is cutting force analysis program. After that, we came up with the optimum conditions of productivity improvement throughout the analysis result of before and after optimization of cutting force, machining time variation, and surface roughness by changing min tangential force to 80, 85, 90% of max tangential force.

A Study on Feedrate Optimization System for Cutting Force Optimization (절삭력 최적화를 위한 이송속도 제어 시스템에 관한 연구)

  • 김성진;정영훈;조동우
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.135-140
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    • 2002
  • Studies on the optimization of machining process can be divided into two different approaches: off-line feedrate scheduling and adaptive control. Each approach possesses its respective strong and weak points compared to each other. That is, each system can be complementary to the other. In this regard, a combined system, which is a feedrate control system for cutting force optimization, was proposed in this paper to make the best of each approach. Experimental results show that the proposed system could overcome the weak points of two systems.

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A study on the Theoretical of Three Dimensional Cutting Force Used Energy Method (에너지 방법을 이용한 삼차원 절삭력의 이론적 여측에 관한 연구)

  • Kim, Jang-Hvung
    • Journal of the Korean Society for Precision Engineering
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    • v.1 no.3
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    • pp.95-105
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    • 1984
  • The purpose of this paper is to predict the cutting force, utilizing new model of double cutting edge which has normal rake angle and tool inclination angle. Changing side, back rake angle and side cutting edge angle in the new model. Three dimensional cutting force was obtained by the use of .eta. /c=i proposed by Stabler and energy method for three dimen- sional cutting force. Theoretical results has been calculated with development of optimization algorism which can be put into three dimensional theory, using the method of least square with orthogonal cutting data. IT is proved that three dimensional cutting force is to be predicted accurately only if orthogonal cutting force by equalizing theoretical result and experimental result has been calculated.

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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