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Computer Applications in Near Net-shape Operations [Kõva köide]

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  • Formaat: Hardback, 338 pages, kõrgus: 230 mm, 243 figures, references, bibliographies, index
  • Sari: Advanced Manufacturing
  • Ilmumisaeg: 31-Jul-1999
  • Kirjastus: Springer London Ltd
  • ISBN-10: 1852331860
  • ISBN-13: 9781852331863
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  • Formaat: Hardback, 338 pages, kõrgus: 230 mm, 243 figures, references, bibliographies, index
  • Sari: Advanced Manufacturing
  • Ilmumisaeg: 31-Jul-1999
  • Kirjastus: Springer London Ltd
  • ISBN-10: 1852331860
  • ISBN-13: 9781852331863
Teised raamatud teemal:
The process of producing components to final net-shapes is fast becoming a desirable goal for metal working industries. This is due to a combination of factors such as the development of new materials and escalating energy costs. Computer Applications in Near Net-Shape Operations addresses the design, analysis and simulation of near net-shape operations using some of the most advanced computer techniques and tools available. Topics covered include: Sheet metal forming operations: progressive stamping, fine blanking, nesting, flat pattering, bending and nibbling; Die design, construction and NC programming of wire EDM; Bulk metal forming processes such as cold upsetting and close-die forging; Injection mould design, analysis and simulation; Computer-aided design of CNC machines for near net-shape operations; Intelligent progressive die design system IPD. This collection of the latest developments from leading experts in the field will be of interest to practising engineers, graduate students and researchers of metal forming, stamping, mould and die design.
List of Abbreviations xv List of Authors xvii Introduction to near net-shape operations 1(6) S.K. Ong A.Y.C. Nee Introduction 1(1) Classification of near net-shape operations 2(3) Sheet metal forming 2(1) Massive (bulk) metal forming processes 3(1) Injection moulding 4(1) Machines for near net-shape operations 4(1) Near net-shape operations: past, present and future 5(2) Bibliography 5(2) CAD/CAM for sheet metal forming and related processes 7(88) Z.G. Li N.F. Choong K.H. See Toh H.T. Loh A.Y.C. Nee Introduction and basic techniques 7(10) Feature modelling of stampings 7(6) Application of expert systems to stamping die design 13(4) Optimisation of blank layout 17(9) Mathematical description of blank layout 18(2) The polygon method 20(1) The height function method 21(5) Fine blanking 26(8) Characteristics of the fine blanking process 26(1) Application of the fine blanking process 27(1) CAD/CAM of fine blanking dies 27(7) Progressive stamping 34(15) Software architecture of the system 35(1) Strip layout 36(6) Construction design of progressive dies 42(7) An overview of a flat patterning and bending simulation system 49(15) Design input module 49(1) Flat pattern development module 50(1) Bending simulation module 50(1) System details 51(6) Implementation of bending simulation module 57(7) CNC punching and nibbling 64(12) Computer-based system for CNC nibbling 64(1) Punch libraries 65(1) Profile classification 66(1) Punch selection and optimisation 67(1) An approach to automatic tool selection 68(6) A case study 74(2) Die construction design 76(8) Design of die and punch 76(3) Layout of ejectors 79(5) NC programming of wire EDM 84(11) Process consideration for NC programming of wire EDM 84(1) Geometric computation 85(3) NC programming procedure for wire EDM 88(3) References 91(1) Bibliography 92(3) CAD/CAM for massive (bulk) metal forming 95(50) J.C. Xia Introduction 95(2) Cold upsetting 97(19) Determination of operations and sequences 97(6) Calculation of process parameters 103(6) Design of dies cavities, general parts and combined dies 109(5) The BNC CAD system 114(2) Closed-die forging 116(29) Selection and calculation of bars 116(2) Determination of operations and sequences 118(8) Calculation of forging load and stress 126(5) Design of dies 131(9) Program flowchart and description 140(4) References 144(1) CAD/CAE/CAM for injection moulding 145(42) D.Q. Li X.G. Ye Introduction 145(3) Brief history of development 145(1) Technological characteristics 146(2) Graphic input and geometry construction of injection moulded products 148(3) Wire-frame modelling 148(1) Surface modelling 149(1) Solid modelling 150(1) CAD for construction design of plastic injection moulds 151(8) Program flowchart 151(1) Standard mould base design 152(3) Cavity and core design 155(1) Runner bar design 156(3) Flow simulation of plastic injection moulding 159(10) One-dimensional flow analysis 159(5) Two-dimensional flow analysis 164(1) Three-dimensional flow analysis 165(4) Cooling simulation of plastic injection moulding 169(7) One-dimensional cooling analysis 169(2) Two-dimensional cooling analysis 171(3) Three-dimensional cooling analysis 174(2) CAM for plastic injection moulds 176(8) Integrated CAD/CAM system 177(1) Information transfer from CAD to CAM 178(2) Tool path generation in 2-D NC 180(2) Manufacturing for 3-D core and cavity 182(2) CAD/CAE/CAM system for plastic injection moulding 184(3) System configuration 184(1) CAD software functions 185(1) CAE software functions 185(1) CAM software functions 186(1) Bibliography 186(1) FEM applications in near net-shape operations 187(64) J.C. Xia S.J. Li Y.X. Ding Introduction 187(1) FEM applications and developments in near net-shape operations 188(18) New algorithms for automatic triangular mesh generation 188(7) New algorithms for mesh rezoning in FEM simulation 195(4) Algorithms for generating isogram in FEM 199(4) Calculation of rigid regions using rigid-plastic FEM 203(3) FEM applications in massive (bulk) metal forming processes 206(9) Simulation of rigid-plastic finite element of radial extrusion process 206(2) Rigid-plastic finite element simulation of the upsetting-backward extrusion process 208(5) Simulation of forward extrusion and upsetting-backward extrusion process 213(2) FEM application in die design 215(22) Basic equations for FEM analysis of combined die and mathematical modelling of pre-stressing force 216(3) FEM solution and program flowchart 219(3) FEM analysis for combined backward extrusion die 222(5) FEM analysis for combined forward extrusion die 227(4) FEM analysis for precision forging die for blades 231(3) Optimisation design of combined dies 234(3) FEM application in analysis of hydraulic presses 237(14) Finite element analysis of fluid transients 237(3) Non-symmetrical frontal solution method for fluid FEM 240(10) References 250(1) CAE/CNC of machines for near net-shape operations 251(14) Y.G. Wang Q.Z. Yang Introduction 251(1) Universal CNC systems for near net-shape operations 252(4) Composition of universal CNC control system 252(1) Intelligent control module board 253(1) Module of control software 254(1) Communication in an integrated-distributed CNC system 254(2) CNC for sheet metal forming machines 256(3) CNC system for shearing machines 256(1) CNC system for press brakes 257(2) FMC for sheet metal bending 259(6) CNC and automatic generation of system software 259(3) Bending design based on features 262(1) Manufacturability criteria for sheet metal bending FMC 262(2) Bibliography 264(1) IMOLD®: an intelligent mould design and assembly system 265(20) Y.F. Zhang J.Y.H. Fuh K.S. Lee A.Y.C. Nee Introduction 265(1) Injection moulding 265(1) Computer applications in injection mould design 266(1) IMOLD® 267(6) IMOLD® functional modules 268(5) Design information management in IMOLD®: assembly tree 273(1) An example 273(10) Conclusions 283(2) References 284(1) Computer applications in intelligent progressive dies design (IPD) 285(30) B.T. Cheok A.Y.C. Nee Introduction 285(1) Overview of the computer architecture 285(2) Advanced knowledge-based techniques for the modelling and generation of progressive dies 287(8) A model-based reasoning (MBR) approach for die design 287(4) Shape representation and spatial reasoning techniques 291(2) A function-spatial language for the configuration of a die 293(2) An industrial case study 295(13) Introduction 295(1) Description of stamping 295(1) Features of the part 295(1) Modelling the part 296(2) The flat pattern 298(1) The strip layout 299(1) 3-D strip layout 300(3) Configuration of the progressive die 303(4) Technical data generated by the system 307(1) Conclusions 308(7) Bibliography 310(5) Index 315