Preface | p. xiii |
List of Tables | p. xv |
Introduction | p. xvii |
Basic Characteristics of Sheet-Metal Forming Processes | p. xvii |
Categories of Sheet-Metal Forming Processes | p. xvii |
Characteristics of Sheet-Metal Parts and Their Technological Properties | p. xviii |
Theoretical Fundamentals | p. 1 |
The Structure of Metals | p. 3 |
Introduction | p. 3 |
The Crystal Structure of Metals | p. 3 |
Deformation and the Strength of Crystals | p. 6 |
Imperfections in the Crystal Structure of Metals | p. 7 |
Grain Sizes and Boundaries | p. 9 |
Strain Hardening | p. 10 |
Recovery and Recrystalization | p. 11 |
Mechanical Behavior of Materials | p. 13 |
Introduction | p. 13 |
Stress / Strain Curves | p. 16 |
Ductility | p. 18 |
True Stress and True Strain | p. 19 |
Manufacturing Processes | p. 21 |
Shearing Process | p. 23 |
Mechanics of Shearing | p. 23 |
Shearing Forces | p. 23 |
Shearing with Straight Parallel Cutters | p. 24 |
Shearing with Straight Inclined Cutters | p. 25 |
Shearing with Rotary Cutters | p. 27 |
Blanking and Punching | p. 29 |
Blanking and Punching Mechanism | p. 29 |
Blanking and Punching Clearances | p. 31 |
Punch Force | p. 33 |
Punch and Die with Parallel Cut Edges | p. 33 |
Punch and Die with Bevel-cut Edges | p. 34 |
Material Economy | p. 35 |
Scrap Strip Layouts | p. 35 |
Altering the Design of the Workpiece | p. 37 |
Multi-line Layout | p. 37 |
Utilizing Scrap from One Piece as Material for Another Piece | p. 38 |
Shaving | p. 39 |
Shaving a Punched Workpiece | p. 39 |
Shaving a Blanked Workpiece | p. 43 |
Bending | p. 45 |
Introduction | p. 45 |
Mechanics of Bending | p. 45 |
Moment of Bending | p. 46 |
Moment of Bending in Elastic-Plastic Domain | p. 49 |
The Moment of Bending in the Purely Plastic Domain | p. 50 |
Bending Forces | p. 51 |
Force for a U-die | p. 51 |
Forces for a Wiping Die | p. 52 |
Forces for a V-die | p. 53 |
Curling | p. 55 |
Three-Roll Forming | p. 56 |
Bend Radius | p. 57 |
Minimum Bend Radius | p. 57 |
Maximum Bend Radius | p. 59 |
Bend Allowance | p. 60 |
Springback | p. 64 |
Clearance | p. 67 |
Deep Drawing | p. 69 |
Introduction | p. 69 |
Mechanics of Deep Drawing | p. 70 |
Deep Drawability | p. 72 |
Forces | p. 74 |
First Drawing Operation | p. 74 |
Subsequent Drawing Operations | p. 75 |
Blank Calculations for Symmetrical Shells | p. 76 |
Determining Shape of Blank for Nonsymmetrical Shells | p. 78 |
Rectangular Shells | p. 78 |
Square Shells | p. 81 |
Drawing Practice | p. 82 |
Defects During Deep Drawing | p. 82 |
Lubrication in Drawing | p. 82 |
Various Forming Processes | p. 85 |
Stretch Forming | p. 85 |
Nosing | p. 87 |
Expanding | p. 92 |
Dimpling | p. 94 |
Spinning | p. 96 |
Flexible Die Forming | p. 99 |
Force in Die Forming | p. 99 |
Die Design | p. 101 |
Basic Die Classifications and Components | p. 103 |
Die Classifications | p. 103 |
Basic Die Components | p. 105 |
Blanking and Punching Dies | p. 109 |
Introduction | p. 109 |
Die Blocks | p. 110 |
Die Opening Profile | p. 110 |
Fastening to the Die Shoe | p. 111 |
Sectioned Die | p. 112 |
Calculation of Die Block Dimensions | p. 113 |
Punches | p. 116 |
Punch Face Geometry | p. 116 |
Methods for Assembling Punches | p. 116 |
Punch Calculations | p. 118 |
Stripper Plates | p. 120 |
Stripper Force | p. 120 |
Stripper Design | p. 121 |
Die Components for Guiding and Stopping | p. 124 |
Stock Guides and Guide Rails | p. 124 |
Die Stops and French Notch Punch | p. 126 |
Positioning the Individual Blank | p. 127 |
Pilots | p. 128 |
Center of Die Pressure | p. 129 |
Examples of Couting Die Designs | p. 131 |
Bending Dies | p. 135 |
Introduction | p. 135 |
Simple Die Designs | p. 135 |
U-Profile Bend Dies | p. 135 |
V-profile Bend Dies | p. 137 |
Universal Bending Dies | p. 138 |
Dies of Complex Design | p. 139 |
Closing Profile Dies | p. 139 |
Special Bending Dies | p. 139 |
Curling and Hinge Dies | p. 141 |
Tube-forming Dies | p. 142 |
Multiple-bend Dies | p. 144 |
Combination Dies | p. 144 |
Progressive Dies | p. 145 |
Deep Drawing Dies | p. 147 |
Introduction | p. 147 |
Draw Rings | p. 147 |
Draw Rings with Corner Radius | p. 147 |
Draw Rings with Conical Profile | p. 149 |
Clearances and Tolerances | p. 151 |
Calculation of the Dimensions of the Punch and Die | p. 151 |
Blank Holders | p. 154 |
Blank Holders | p. 154 |
Blank Holder Pressure | p. 155 |
Blank Holder Force | p. 155 |
Draw Beads | p. 156 |
Single-operation Dies | p. 158 |
Multi-operation Dies | p. 160 |
Progressive Dies | p. 160 |
Drawing Dies for Pieces of Spherical and Parabolic Shape | p. 162 |
Ironing Dies | p. 164 |
Various Forming Dies | p. 167 |
Nosing Dies | p. 167 |
Expanding and Bulging Dies | p. 170 |
Expanding Dies | p. 170 |
Bulging Dies | p. 171 |
Flanging Dies | p. 172 |
Tool and Die Materials | p. 175 |
Introduction | p. 175 |
Carbon and Alloy Steels | p. 175 |
Designations for Carbon and Alloy Steels | p. 176 |
Effects of Various Alloy Elements in Steels | p. 176 |
Carbon Steels | p. 176 |
Alloy Steels | p. 177 |
Machinability of Steels | p. 177 |
Mechanical Properties of Steels | p. 178 |
Applications of Carbon and Alloy Steels | p. 179 |
Tool and Die Steels | p. 179 |
Designation and Classification of Tool and Die Steels | p. 179 |
Cold Work Tool and Die Steels | p. 181 |
Nonferrous Metals | p. 182 |
Nonmetallic Materials | p. 183 |
Blank Diameter of Drawn Shells | p. 185 |
Metric System Tolerances on Linear Dimensions | p. 189 |
Miscellaneous Information | p. 199 |
Glossary | p. 209 |
Bibliography | p. 215 |
Index | p. 217 |
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