• 제목/요약/키워드: Manufacturing Feature

검색결과 392건 처리시간 0.025초

사출금형의 지식베이스에 의한 자동공정설계시스템 (Automated Process Planning System based on Knowledge Base for Injection Mold)

  • 조규갑;임주택;이가상;김필성;김병현
    • 한국정밀공학회지
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    • 제8권4호
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    • pp.55-63
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    • 1991
  • This paper deals with development of a Computer Aided Process Planning System based on knowledge base in addition to database for injection mold as a part of Computer Integrated Manufacturing System for injection mold manufacture. The prposed system consists of four modules such as manufacturing feature code generation module machine tool selection and sequencing module, operation and cutting tool selection mudule and standard time estimation module. The system is programmed by using Turbo Pascal on the IBM-PC/AT. The performance of the system is evaluated by using real problems and the test results indicate that the proposed system is a practical and efficient system.

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Geometric Modeling and Five-axis Machining of Tire Master Models

  • Lee, Cheol-Soo
    • International Journal of Precision Engineering and Manufacturing
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    • 제9권3호
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    • pp.75-78
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    • 2008
  • Tire molds are manufactured by aluminum casting, direct five-axis machining, and electric discharging machining. Master models made of chemical wood are necessary if aluminum casting is used. They are designed with a three-dimensional computer-aided design system and milled by a five-axis machine. In this paper, a method for generating and machining a tire surface model is proposed and demonstrated. The groove surfaces, which are the main feature of the tire model, are created using a parametric design concept. An automatically programmed tool-like descriptive language is presented to implement the parametric design. Various groove geometries can be created by changing variables. For convenience, groove surfaces and raw cutter location (CL) data are generated in two-dimensional drawing space. The CL data are mapped to the tread surface to obtain five-axis CL data to machine the master model. The proposed method was tested by actual milling using the five-axis control machine. The results demonstrate that the method is useful for manufacturing a tire mold.

CNC 만능 원통연삭기의 CAD/CAM 시스템 개발 (Development of the CAD/CAM System for CNC Universal Cylindrical Grinding Machines)

  • 조재완;김석일
    • 한국CDE학회논문집
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    • 제5권4호
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    • pp.312-318
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    • 2000
  • In this study, an exclusive CAD/CAM system is developed for enhancing the effectiveness and productivity of CNC universal cylindrical grinding machines on which the external/facing/internal grinding cycles and the wheel dressing cycles are integratively carried out. The CAD/CAM system can manage the various processes such as geometry design, NC code generation, NC code verification, DNC operation, and so on. Especially, the feature-based modeling concept is introduced to improve the geometry design efficiency. And the NC code verification is realized by virtual manufacturing technique based on the real-time analysis of NC codes and the boolean operation between workpiece and wheel.

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복합신호 검출에 의한 압축기 부품의 상태 진단 (The Abnormal Condition Diagnosis of Compressor Parts using Multi-signal Sensing)

  • 이감규;김전하;강익수;강명창;김정석
    • 한국기계가공학회지
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    • 제3권3호
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    • pp.11-16
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    • 2004
  • In this study, the characteristics of signals such as acoustic emission, vibration amplitude and noise level which are derived from the abnormal condition of compressor are investigated. The normal condition, vane stick sound and roller defect condition are chosen to analyze the signal in each cases. From the feature extraction of each signals, the dominant parameters of each signals which can identify the abnormal condition are suggested.

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A Study on the Development of Multi-pilotting-type Progressive Die for U-bending Part Process

  • Sim, Sung-Bo;Lee, Sung-Taeg;Jang, Chan-Ho
    • 한국기계가공학회지
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    • 제2권2호
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    • pp.45-51
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    • 2003
  • The multi-piloting type progressive die for U-bending sheet metal production part is a very specific division. This study reveals the sheet metal forming process with multi-forming die by center carrier type feeding system. Through the FEM simulation by DEFORM, it was accepted to u-bending process as the first performance to design of strip process layout. The next process of die development was studied according to sequence of die development, i.e die structure, machining condition for die making, die materials, heat treatment of partially die components, know-how and so on. The feature of this study is the die development of scrapless progressive die of multi-stage through the modeling on the I-DEAS program, components drawing on the Auto-LISP, CAD/CAM application, ordinary machine tool operating and revision by tryout.

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박판 포밍제품의 프로그레시브 금형개발에 관한 연구 (A Study on the Progressive Die Development of Sheet Metal Forming Part)

  • 심성보;이성택
    • 한국기계가공학회지
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    • 제3권4호
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    • pp.43-49
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    • 2004
  • The production parts have required multiple processes such as drawing, piercing, blanking and notching etc. are performed with a high production rates in progressive die. In order to prevent the defects of process result, the optimization of strip process layout design, die design, die making, and tryout etc. are needed. According to these factors of die development process, it has been required that the theory and practice of metal working process and its phenomena, die structure, machining conditions for die making, die materials, heat treatment of die components, processing know-how and so on. In this study, we designed and analyzed die components through the carrying out of upper relevant matters also simulated the strip process layout of multiple stage drawing by DEFORM. Especially the result of tryout and its analysis became to the feature of this study with a system of PDDC(Progressive Die design by computer).

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초음파 금속 용착을 위한 반파장 혼의 설계 및 제작 (A Horn of Half-wave Design and Manufacture for Ultrasonic Metal Welding)

  • 김은미;장호수;박동삼
    • 한국생산제조학회지
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    • 제19권6호
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    • pp.790-796
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    • 2010
  • This paper designed the horn of half-wave needed for Ultrasonic meta) welding. The horn has to be designed and manufactured accurately, because measurements such as the shape, length, mass and etc. have effects on the resonant frequency and the vibration mode. Designed horn of half-wave has the feature of 40,000Hz of nature frequency, and maximizes vibration range in the Tip by resonance in the frequency of ultrasonic wave machine. In this study, we calculated and analyzed the natural frequency to find the optimal design of the horn that amplified the amplitude about double by the modal analysis and harmonic analysis using ANSYS. And we did FFT analysis of the manufactured horn.

음향 방출법에 의한 공작기계 기어상자의 결함 검출 (Fault Detection of the Machine Tool Gearbox using Acoustic Emission Methodof)

  • 김종현;김원일
    • 한국기계가공학회지
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    • 제11권4호
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    • pp.154-159
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    • 2012
  • Condition monitoring(CM) is a method based on Non-destructive test(NDT). Therefore, recently many kind of NDT were applied for CM. Acoustic emission(AE) is widely used for the early detection of faults in rotating machinery in these days also. Because its sensitivity is higher than normal accelerometers and it can detect low energy vibration signals. A machine tool consist of many parts such as the bearings, gears, process tools, shaft, hydro-system, and so on. Condition of Every part is connected with product quality finally. To increase the quality of products, condition monitoring of the components of machine tool is done completely. Therefore, in this paper, acoustic emission method is used to detect a machine fault seeded in a gearbox. The AE signals is saved, and power spectrums and feature values, peak value, mean value, RMS, skewness, kurtosis and shape factor, were determined through Matlab.

인공신경망에 의한 기계구동계의 작동상태 예지 및 판정 (Forceseeability and Decision for Moving Condition of the Machine Driving System by Artificial Neural Network)

  • 박흥식;서영백;이충엽;조연상
    • 한국생산제조학회지
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    • 제7권5호
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    • pp.92-97
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    • 1998
  • The morpholgies of the wear particles are directly indicative of wear processes occuring in machinery and their severity. The neural network was applied to identify wear debris generated from the machine driving system. The four parameters(50% volumetric diameter, aspect, roundness and reflectivity) of wear debris are used as inputs to the network and learned the friction condition of five values(material 3, applied load 1, sliding distance 1). It is shown that identification results depend on the ranges of these shape parameters learned. The three kinds of the wear debris had a different patter characteristic and recognized the friction condition and materials very well by artificial neural network. We discussed how the network determines differencee in wear debris feature, and this approach can be applied to foreseeability and decisio for moving condition of the Machine driving system.

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반도체 전용기용 컨트롤러의 구조 안정화 설계 (Design of a Controller for the Semiconductor Fabricator with Improved Stability)

  • 노승훈;손재율;임요한;이재열
    • 한국산업융합학회 논문집
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    • 제12권1호
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    • pp.43-50
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    • 2009
  • The manufacturing process of the semiconductor is guided by the controller, which is supposed to sense the unexpected shocks and/or vibrations to shutdown the hard disk and the whole system in order to prevent the malfunction. This feature of controller would shutdown the system due to the instability of the controller itself as well as the instability of the manufacturing system. And consequently will cause significant losses. In this study the structure of a controller has been investigated to find ways to suppress the vibrations from the structure. The frequency response test and the computer simulation has been implemented to find the structure with improved stability. The result of the study shows that the relatively simple design alterations can eliminate most of the vibrations.

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