• Title/Summary/Keyword: Automated die program

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An Automated CAD System for Press Die Design in Cold Forging of Axisymmetric Parts (축대칭 제품을 위한 프레스 냉간단조 금형의 자동설계 기술)

  • Kim, Jong-Ho;Ryu, Ho-Yeun;Hong, Ki-Gon
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.2 s.95
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    • pp.87-94
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    • 1999
  • The automated die design program is developed for cold forging of axisymmetric parts which are mainly produced by forward extrusion, backward extrusion, composite extrusion and upsetting. For this study, firstly classification of forged parts and investigation of die construction type usually employed in forging industry are carried out and the most proper type from several kinds of die construction is proposed as a standardized one. Based on the die design rules summarized in the references such as handbooks, technical papers, monthly journals, etc. the automated die design program was made using AutoLISP language available in AutoCAD software of personal computer. This program interactively runs for only input data, for example, forging process, shape of forged parts, type of punch, split of die insert and design of shrinkage rings and then displays details of drawings necessary to make a forging die. When a variety of forging processes and forged parts are tested to examine the validity of this program, it was confirmed to give good results applicable to the forging die design in press shop.

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A Study on Development of Program for an Automated Thixoforming Process Design (Thixoforming 공정설계 자동화를 위한 프로그램 개발에 관한 연구)

  • Kim, Nam-Seok;Jeong, Hong-Gyu;Gang, Chung-Gil
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.1
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    • pp.44-55
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    • 2001
  • The flow behavior of semi-solid materials (SSM) is required to assist the industrial application of thixoforming technology. Particularly, to reduce many lead times, many numerical analysis packages have been developed to simulate required metal forming processes. The objectives of the development of SEMI-FORM for thixoforming process design are to predict the effect of various process variables such as pressing force, die temperature, and die velocity. However, there have not been any reports which adapt these packages to the specific characteristics of SSM. SO, this paper presents an overview of the development of thixoforming simulator of SEMI-FORM. The solver and post-processor of SEMI-FORM S/W for an automated thixoforming process design with arbitrarily shaped die are composed of FORTRAN Power Station 4.0 and Visual Basic 5.0, respectively. This developing SEMI-FORM S/W would be very useful for thixoforming practitioners and engineers to select the optimal process conditions to produce automotive parts with high quality.

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Timing Chart Auto-Design system development for an Automated hemming die design (헤밍금형설계의 자동화를 위한 타이밍선도 자동설계시스템개발)

  • 정효상;조윤행
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.973-976
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    • 2004
  • So far, this report is written by knowledge and standard through several reference drawing and experienced contents with drawing hemming die. The contents about actual design is so huge that I will write about it next time. Timing chart is important to hemming die because of link position and numbers. Timing chart need a very much design time because link number and position have to applied for each case. In this paper developed an automatic timing chart and link position by relation and Pro/Program of Pro/Engineer. The method used relation rule of design parameter for timing chart. In the future, I believe that simple easy to correct and reasonable price hemming die will be producted.

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An Automated Process Planning and Die Design System for Blanking of Stator and Rotor Parts (스테이터 및 로터의 블랭킹에 관한 공정설계 및 금형설계 시스템)

  • Park, J.C.;Kim, M.M.;Lee, S.M.
    • Journal of the Korean Society for Precision Engineering
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    • v.13 no.8
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    • pp.40-51
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    • 1996
  • This paper describes some research works of computer-aided design of blanking and piercing progressive die for stator and rotor parts. An approach to the system is based on knowledge based rules. The deveolped system is composed of six modules such as main program, input and shape treatment, production feasibility check, strip layout, die layout and drawing edit module. Using this system, design parameters ( geometric shapes, die and punch dimensions and dimensions of tool elements) are determined and output is gen- erated in graphic from. Knowledges for tool design are extracted from the plasticity theories, handbooks, relevant references and empirical know-hows of experts in blkanking companies. The developed system provides powerful capabilities for process planning and die design of stator and rotor parts.

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Manufacture of Press Die Pattern Using Laser System (레이저 가공 시스템을 이용한 프레스 금형용 패턴 제작)

  • 최명수;강경호;김재도
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.816-819
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    • 2000
  • Recently the styrofoam has been used fur material of press die pattern. The object of this research is to develope an automated laser system for manufacture of press die pattern which depends chiefly on handwork during its process. After converting 3-D CAD model into cross-sectional shape information, the unnecessary part of the section is vapored away by laser. The depth and width of cut are mainly under the control of laser power and beam feed rate. The optimum manufacturing conditions are obtained by preliminary experiments. It is necessary fur precise styrofoam pattern manufacturing to develope laser system which has sufficient motion accuracy and program or beam path generation and automatic control of this system.

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A study on automated process for surface finishing of die and mould using ultrasonic vibration (초음파 진동을 이용한 금형사상의 자동화 공정 연구)

  • Pyoug Y. S.;Kwon H. H.;Azuma N.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2002.11a
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    • pp.79-87
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    • 2002
  • An attempt to automate the surface finishing process of the die and mould has been carried out. An UMB(Ultrasonic Micro Burnishing) equipment which brought the micro plastic cold deformation to the 3D sculptured surface of mold and dies by ultrasonic vibration and static load, was developed and installed at the head stock of a vertical machining center. To be satisfied with the required surface roughness and hardness, the DB based program was also developed and applied. This equipment composes of UMB equipement, CNC vertical machining center, CAD/CAM system and the DB based program fer optimal condition. UMB processing effect was obtained from initial value Ral.25 and Hk337 to Ra0.085 and Hk521 and similar result was shown in industrial mould application.

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Optimal Design and Die Manufacturing of an Axial Fan for Cooling Towers (냉각탑용 축류팬 설계 및 금형제작의 자동화)

  • Kang, Jae-Gwan;Lee, Hak-Sun;Oh, Kun-Je;Jung, Jong-Youn
    • IE interfaces
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    • v.13 no.4
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    • pp.717-724
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    • 2000
  • In this paper, an integrated system of optimal design, performance evaluation, and die design and manufacturing of axial fans for cooling tower is presented. The design and performance evaluation are developed based on three dimensional flow analysis so as to ensure low noise and high efficiency. The methodologies are implemented on computer as a GUI system including 3-D surface modeling and 2-D drawing file output modules. The CAD/CAM system is engaged to design the die and generate NC tool path, but the processes are also automated and integrated into the system by means of a part program coded from the design data. It is shown that the newly developed fans have superior performance and shortened lead-time compared to the existing dead-copied fans.

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Rule-based approach for the design of AGV path in CIMS (CIMS 에서의 규칙에 근거한 AGV 경로의 설계)

  • 최해운;정무영
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.793-798
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    • 1991
  • Implementation of AGVS (Automated Guided Vehicle System) in CIMS (Computer Integrated Manufacturing System) generally requires substantial study to optimize design and performance of the guide path. Traditional mathematical approaches have been used with limited success to analyze AGVS. These approaches, however, do not provide a practical opportunity to use by path designers. This paper presents a new approach based on Jules in designing and assessing AGV path to have better design of the closed-loop layout. A framework for the approach is proposed and a case study is reported to demonstrate the framework. Deletion of seldom used paths and addition of bypasses to solve the congestion problem are conducted automatically through simulation expefiments. To visualize die results a graphic control program is developed and integrated with AutoMod/AutoGram simulation package.

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Characteristics of Symmetric-Shape Parts Shearing on Micro NCT (마이크로 NCT에 의한 대칭형상구멍의 전단특성)

  • Hong N. P.;Kim B. H.;Chang I. B.;Kim H. Y.;Oh S. I.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2002.02a
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    • pp.285-291
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    • 2002
  • The shearing process for the sheet metal is normally used in the precision elements such as a frame of TFT-LCD or lead frame of If chips. In these precision elements, the burr formation prevents the system assembly and needs the additional burr removing process. In this paper, we developed the small size NC punching system which has an aligning kinematics between the rectangular shaped punch and die. The punch is driven by an ai cylinder and the sheet metal is moving on the X-Y table system which is driven by two stewing motors. The microprocessor control the whole system and communicate with the monitoring PC by RS232C serial communication protocol. The graphic user interface program in PC monitors nil control the punching system. The cross shaped joint hinge supports the punching die and positioned by two differential screws, whose are installed in perpendicular directions. The aligning between the punch and die is performed using the sheets of half thickness(0.1mm Brass) of the real process for the frame of the TFT-LCD. Using half thickness Brass, the burr formation is magnified and we can decide the aligning direction more easily then using the real thickness(0.2mm) Aluminum. In this paper, the aligning results are measured manually using the SEM photographs and we hope to make the automated aligning procedures using some kinds of image processing techniques.

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A Meta-Ontology for Automated Information Integration of Parts Libraries (부품 라이브러리 정보의 자동 통합을 위한 메타 온톨로지)

  • Cho, J.M.;Han, S.H.;Kim, H.
    • Korean Journal of Computational Design and Engineering
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    • v.11 no.4
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    • pp.273-288
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    • 2006
  • Information integration of heterogeneous digital parts libraries or electronic pars catalogs is one of issues in B2B procurements. We need to provide an integrated view for multiple information sources. Utilization of ontologies as the metadata descriptions of the information sources can provide an integrated view. However, in order to integrate independently developed ontologies, the mismatches among them should be resolved. In this paper, we propose an ontology of meta-concepts, i.e. meta-ontology. The meta-concepts play the role of vocabulary to describe the parts library ontologies and provide well-established ontological semantics that helps the ontology modelers to consistently identify parts library concepts and systematically structure them. Consequently, the meta-ontology reduces the differences in the way the parts knowledge is interpreted and ensures the mismatches are confined to manageable mis matches, so that a software program can merge automatically. Modeling ontologies of mold and die parts libraries for B2B e-commerce is taken as an example to show how to use the meta-ontology. We also discuss how a parts library mediation system can automatically merge the well-structured parts library ontologies.