• Title/Summary/Keyword: CAD/CAM, NC Machining

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Study on die plate design and machining using the 3D CAD/CAM system (3D CAD/CAM을 활용한 다이 플레이트의 설계 및 가공)

  • Chio Kye-Kwang
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.4
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    • pp.550-553
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    • 2006
  • This study used the 3D CAD/CAM system in manufacturing die plates to improve productivity. UG NX 3.0 was used as 3D CAD/CAM software, with the created NC code transmitted to the CNC Milling and Wire Cut Electric Discharge machine. The die plate was then automatically machined.

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CAD/CAM system for Cam (Cam의 CAD/CAM)

  • Kim, Ki Dae
    • Journal of Biosystems Engineering
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    • v.16 no.3
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    • pp.228-238
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    • 1991
  • Cam plays very important roles due to continuous requirement for the high-speed and automation of the machinery. A large number of studies of cam curve were carried out by many researchers, and CNC milling and machining center for manufacturing cam have been widely used recently. The purpose of this study was to develop a CAD/CAM system for cam using QuickBasic language in 16-bit PC for application of cam design and manufacturing. Results obtained were as follows : 1. It was possible to input data by entering cam angle and its corresponding R, from 0 to 360 deg. of cam angle. The tediousness at entering data was minimized because of the same data format for both cylindrical cam and disc cam, and free format used for data file. 2. It was possible to design cam by choosing only the number of cam curve because of developing the CAD/CAM program with dimensionless method of cam curves including widely used 19 kinds. After selecting the number of the cam curve, the CAD/CAM system automatically shows the characteristics of cam motion enough to help a designer to decide : displacement, velocity, acceleration and jerk. 3. It was possible to execute, in an efficient way, both the cam profile synthesis and the generation of NC program for CNC machining center by using the input data. 4. This NC program generated by the CAD/CAM system developed here, was evaluated as positive in relation with actual manufacturing experiments and thought to be useful in its application without any modification. It can be said that this CAD/CAM system could be used by the beginners to design and manufacture the cam automatically as the system consists of very simple dialogue methods. In addition, self-developed QuickBasic would be would used as a basic tool for further stuides in this area of research, together with application.

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Study on Development of Parallel-Typed Tilting Table and RAD Tool Program (병렬기구형 틸팅 테이블 및 RAD Tool 프로그램 개발에 관한 연구)

  • 김태성;박성민;원동희;이민기;박근우
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.04a
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    • pp.284-289
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    • 2002
  • In this paper, we develop a six-axes machining center tool(MCT) and CAD/CAM system based RAD Tool Program. The MCT consists of two mechanical parts, i.e., a X-Y-Z Cartesian coordinate typed MCT and a parallel-typed tilting table. Kinematics and singularity are accomplished to design the parallel-typed tilting table, and RAD Tool Program Is developed for the six-axes MCT, which requires the commands of position as well as orientation for machining of complex shape. In RAD Tool, the CAD/CAM system has a tool path generator, NC code generator and a graphic simulator. This paper designs the parallel-typed tilting table to meet the desired specification and presents the results of CAD/CAM system based RAD Tool Program.

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Structured Modeling of Sculptured Surface Machining Process (자유곡면 가공공정의 정형화된 모델링)

  • 김대현;김보현;편영식;최병규
    • Korean Journal of Computational Design and Engineering
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    • v.3 no.3
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    • pp.192-200
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    • 1998
  • Even though most die-maker are using CAD/CAM systems rout NC tool-path generation, “front-end”CAD/CAM technologies have not been fully adapted to sculptured surface machining(SSM) nor are sufficiently utilized in die shops. This gap between die-making industry and CAD/CAM community persists mainly because of the lack of a SSM-process model through which the two groups communicate with each other. Proposed in this paper is a model of SSM-processes which is built around the concepts of machining stages, unit machining operations, and each machining stage is decomposed into a sequence of unit machining operations(UMOs). Identified in the paper are five machining stages and 17 types of UMO. Based on the framework of the proposed model, an example of inner-panel stamping-die machining processes is described in detail.

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CAD/CAM System for 5-Axis Machining of Marine Propeller (프로펠러 5축 가공을 위한 CAD/CAM 시스템)

  • Jae-Woong Youn;Jong-Hwan Park
    • Journal of the Society of Naval Architects of Korea
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    • v.35 no.2
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    • pp.51-62
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    • 1998
  • In this paper, a CAD/CAM system for 5-axis machining of model propeller is introduced. This system has been developed under the environment of personal computer and Windows NT. In order to enhance the productivity, existing text-based design S/W was integrated into this graphic-based system. Non-Uniform Rational B-Spline method is used to represent the sculptured surface of propeller blades and hub using point data, and surface blending between blade and hub is realized in this system. For 5-axis machining of sculptured surface, tool/work collision and interference are checked and inverse kinematic analysis is performed to make NC data. In addition, tool and workpiece are animated on the PC monitor by preparing NC verification module. Finally, optimal cutting conditions are determined empirically and those cutting conditions are integrated into this S/W so that the whole process from design to machining can be done automatically.

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축대칭 제품의 디프 드로잉 공정에 대한 금형설계 및 금형가공 시스템

  • Park, Sang-Bong;Choi, Young;Kim, Byung-Min;Choi, Jae-Chan
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.04a
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    • pp.766-770
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    • 1996
  • In this study, a CAD/CAM system for axisymmetric deep drawing processes has been developed. An approach to the system is based on the knowledge based system. Under the environment of CAD/CAM software of Personal Designer, the system has been written in UPL. The geometries of intermediate and final object in deep drawing process, including processes parameters are input for the CAD/CAM system. The input data can be obtained from the results of Pro-Deep. The parts drawing of die sets for each process is generatedin tool design module of the CAD/CAM system. Also, the die assemblydrawings can be obtained. NC commands for machining of the part can be generated in the developed CAD/CAM system.

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Tool Path Generation of a Die Cavity Defined by Sculptured Surfaces (자유곡면으로 이루어진 Cavity의 가공경로생성)

  • Jun, Yong-Tae;Park, Se-Hyung
    • Journal of the Korean Society for Precision Engineering
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    • v.10 no.3
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    • pp.161-167
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    • 1993
  • This paper deals with a new method for the machining of a die cavity defined by sculptured surfaces. In machining die cavities or pockets, process planners have been faced with some troulbes. One of the troubles ius to rebove a great deal of material within a given boundary while avoiding cutter interference. Cutter interference is a ciritical problem in NC machining of a die cavity. Even though this cavity machining has been implemented in many CAM systems, most of them can handle limited shapes of cavities or pockets. In this paper, a procedure has been developed to machine die cavity or pocket of a sculptured surface. The offset surfaces of the part surfaces and boundary surfaces are determined to calculate the intersection curves. These intersection curves form a FACE on the part surface, and the interference free tool pathe is generated by eliminating the points outside the FACE when computing the cutter contact (CC) data. Additionally, the cutter location (CL) data obtained from the CC data convert to an NC data. The NC data generated through this algorithm are verified on the CINCINNATI milling machine. A propotype die cavity machining system has been implemented in FORTRAN language and FIGARO graphics library on IRIS workstation.

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Workpart and Setup Planning for NC Machining of Prismatic Model:Feature-Based Approach (형상인식에 의한 다면체모델의 NC 가공을 위한 소개 및 셋업계획)

  • 지우석;서석환;강재관
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10a
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    • pp.1078-1083
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    • 1992
  • Extracting the process planning information from the CAD data is the key issue in integrated CAD/CAM system. In this paper, we develop algorithms for extracting the shape and setup configuration for NC machining of prismatic parts. In determining the workpart shape, the minimum-enclosing condept is applied so that the material waste is minimized. To minimize the number of setups, feature based algorithm is developed considrint the part shape, tool shape, and tool approach direction. The validity and effectiveness of the developed algorithms were tested by computer simulations.

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A Study on Design and Manufacture of Spatial Cams (입체 캠의 형상 설계와 가공에 관한 연구)

  • 김찬봉;양민양
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.6
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    • pp.1361-1371
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    • 1993
  • The effort of this paper is to develop a methodology of computer aided design and manufacture of spatial cams. The integrated CAD/CAM systems for spatial cams are developed to enable manufacturer to design and machine them readily. The contour of spatial cams can be obtained by applying envelope theory to the cam/follower motion. The mathematical cam contour is evaluated at some increment to generate the numerical data for the CNC programming. Incremental generation of points along a cam contour can be accomplished in consideration with the specified tolerance. The computerized procedure is described in detail with accompanying examples.

NC Tool Paths Program Development for the Pocket Machining (포켓 가공을 위한 NC 공구경로의 프로그램 개발)

  • Oh, Seon;Kwon, Young-Woong
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.12 no.3
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    • pp.75-81
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    • 2003
  • Pocket machining is metal removal operation commonly used for creating depressions in machined parts. Numerically controlled milling is the primary means for machining complex die surface. These complex surfaces are generated by a milling cutter which removes material as it traces out pre-specified tool paths. To machine, a component on a CNC machine, part programs which define the cutting tool path are needed. This tool path is usually planned from CAD, and converted to a CAM machine input format. In this paper I proposed a new method for generating NC tool paths. This method generates automatically NC tool paths with dynamic elimination of machining errors in 2$\frac{1}{2}$ arbitrary shaped pockets. This paper generates a spiral-like tool path by dynamic computing optimal pocket of the pocket boundary contour based on the type and size of the milling cutter, the geometry of the pocket contour and surface finish tolerance requirements. This part programming system is PC based and simultaneously generates a G-code file.