• Title/Summary/Keyword: 주분력

Search Result 6, Processing Time 0.018 seconds

Prediction of Cutting Force using Neural Network and Design of Experiments (신경망과 실험계획법을 이용한 절삭력 예측)

  • 이영문;최봉환;송태성;김선일;이동식
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 1997.10a
    • /
    • pp.1032-1035
    • /
    • 1997
  • The purpose of this paper is to reduce the number of cutting tests and to predict the main cutting force and the specific cutting energy. By using the SOFM neural network, the most suitable cutting test conditions has been found. As a result, the number of cutting tests has been reduced to one-third. And by using MLP neural network and regression analysis, the main cutting force and specific cutting energy has been predicted. Predicted values of main cutting force and specific cutting energy are well concide with the measured ones.

  • PDF

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
    • /
    • v.16 no.3
    • /
    • pp.119-124
    • /
    • 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 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
    • /
    • v.20 no.6
    • /
    • pp.824-829
    • /
    • 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 the Productivity Improvement of Inconel 718 Material Using Cutting Force Control Program (절삭력 제어 프로그램을 이용한 Inconel718 소재의 생산성 향상에 관한 연구)

  • Lee, Seung-Heon;Son, Hwang-Jin;Cho, Young-Tae;Jung, Yoon-Gyo
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.16 no.6
    • /
    • pp.41-46
    • /
    • 2017
  • Productivity improvement and cost reduction in the aircraft industry have become major industrial objectives, and improving productivity by reducing machining time has become a key focus. When numerical cutting code is created by CAM software, such as CATIA or UG-NX, it is impossible to control machining feed speed using cutting force changes depending on the machining tool path. However, machining an aircraft engine part from difficult material, such as Inconel 718, takes a long time, and tool chipping or breakage often occurs from forcing the machining path too quickly. This study investigated and verified the reliability of the AdvantEdge production module (PM)using cutting power tests. In particular, diffuser and diffuser case parts were considered, comparing cutting power and machining time using AdvantEdge PM and CATIA.

A Study on Detection of Cutting Tool Fracture by Dual Signal Measurements (이중신호에 의한 공구파손 검출에 관한 연구)

  • 윤재웅;양민양;박화영
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.16 no.4
    • /
    • pp.707-722
    • /
    • 1992
  • Fracture of a cutting tool is one of the most serious problems in machining systems. Therefore, several methods have been proposed so far to detect cutting tool fracture. However, most of them have some problems from the viewpoint of practical applications. In this study, the feasibility of using acoustic emission and cutting force signals for the detection of massive tool breakages as well as small fracture of cutting tools were investigated. Turning experiments were performed using conventional carbide inset tools under realistic cutting conditions and the SM45C steel and heat treated SM45C steel were used as a workpiece. And the sensitivities of the AE and cutting force signals to the fracture of cutting tools were illustrated. Finally, a detection algortithm for the fracture of cutting tools was developed through the analysis of these dual signals in the several types of tool fracture.

A study on the Cutting Force Variation Comparison between Low CBN and Coated Low CBN Tools in Turning of SCM440 (Low CBN 코팅공구의 SCM440 선삭시 절삭력변화에 관한 연구)

  • Bang, Hong-In;Kim, Tea-Young;Oh, Sung-Hoon
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.12 no.1
    • /
    • pp.9-14
    • /
    • 2013
  • In recent years, high hardness steel is used for most of the material in many areas including aircraft, nuclear power, space exploration and automotive parts. Low CBN tools are widely used in industrial field which can effectively process high hardness steel of HRC 45 or harder. The results of this study demonstrated, when high hardness steel, SCM440 is turned with Low CBN tools coated with TiN and TiAlN coatings respectively, that both the thrust force and cutting force tends to increase with more increase in cutting force than thrust force, as the feed rate increases at constant cutting speed. In addition, the size of the cutting force and thrust force does not change with the increased cutting speed at the same feed rate, but the tool life is reduced if the cutting speed is increased to shorten the machining time. Therefore, it is recommended to limit the cutting speed at 250 m/min maximum or less. Furthermore, comparing the cutting force of the three tools at the same cutting condition, Tin coating tool showed the smallest cutting force and Low CBN was the next, and the TiAlN coating tools showed the largest cutting force.