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METAL FORMING, SHAPING, AND CASTING

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Metal-forming processes use a remarkable property of metals—their ability to flow plastically in the solid state without concurrent deterioration of properties. Moreover, by simply moving the metal to the desired shape, there is little or no waste. | CHAPTER 34 METAL FORMING SHAPING AND CASTING Magd E. Zohdi Dennis B. Webster Industrial Engineering Department Louisiana State University Baton Rouge Louisiana William E. Biles Industrial Engineering Department University of Louisville Louisville Kentucky 34.1 INTRODUCTION 1101 34.4.3 34.4.4 Permanent-Mold Casting Plaster-Mold Casting 1123 1125 34.2 HOT-WORKING PROCESSES 1102 34.4.5 Investment Casting 1125 34.2.1 Classification of Hot-Working Processes 1103 34.5 PLASTIC-MOLDING 34.2.2 Rolling 1103 PROCESSES 1126 34.2.3 Forging 1105 34.5.1 Injection Molding 1126 34.2.4 Extrusion 1107 34.5.2 Coinjection Molding 1126 34.2.5 Drawing 1107 34.5.3 Rotomolding 1126 34.2.6 Spinning 1110 34.5.4 Expandable-Bead Molding 1126 34.2.7 Pipe Welding nil 34.5.5 Extruding 1126 34.2.8 Piercing 1111 34.5.6 Blow Molding 1126 34.5.7 Thermoforming 1127 34.3 COLD-WORKING PROCESSES 1112 34.5.8 Reinforced-Plastic 34.3.1 Classification of Molding 1127 Cold-Working Operations 1112 34.5.9 Forged-Plastic Parts 1127 34.3.2 Squeezing Processes 1113 34.3.3 Bending 1114 34.6 POWDER METALLURGY 1127 34.3.4 Shearing 1116 34.6.1 Properties of P M 34.3.5 Drawing 1118 Products 1127 34.4 METAL CASTING AND 34.7 SURFACE TREATMENT 1128 MOLDING PROCESSES 1120 34.7.1 Cleaning 1128 34.4.1 Sand Casting 1120 34.7.2 Coatings 1130 34.4.2 Centrifugal Casting 1121 34.7.3 Chemical Conversions 1132 34.1 INTRODUCTION Metal-forming processes use a remarkable property of metals their ability to flow plastically in the solid state without concurrent deterioration of properties. Moreover by simply moving the metal to the desired shape there is little or no waste. Figure 34.1 shows some of the metal-forming processes. Metal-forming processes are classified into two categories hot-working processes and cold-working processes. Mechanical Engineers Handbook 2nd ed. Edited by Myer Kutz. ISBN 0-471-13007-9 1998 John Wiley Sons Inc. 1101 1102 METAL FORMING SHAPING AND CASTING Rolling Forging Extruding Steps in spinning Final shape