The die cast industry has long used trial and error as a development method, resulting in growth of the use of CFD (computational fluid dynamics) software. This book will discuss the governing laws of the fluid dynamics that have an effect on die cast die and die cast process design.
ATLAB and Visual Basic code are listed in for every stage of product, die and die cast process design. Readers will learn about: the advantages and limitations of the die cast process; the implications product design has on the quality of the die cast part; how die cast die and process design can affect the physical properties of the casting; the calculations die cast die and process designers have to do; choosing the die cast machine size and the proper gate size; and how to properly design gas ventilation systems, identify an ideal fill time, and calculate fast and slow shot velocity.
This book will interest product designers that design die cast parts and die cast die and process engineers and designers. TOC:Introduction.- Introduction to fluid dynamics.- Part design.- Die design.- Process design.- Quality.- Computer simulations. This book is the result of 40 years of the combined authors¿ experience in mechanical and fluid dynamics engineering. It gives an overview of product and process development from the analytical standpoint. This book has not been intended to revolutionize the casting industry. The principals of fluid dynamics and static mechanics were largely developed in the nineteenth century, but process development still largely remains a trial and error method. This book is intended to underline the principals of strength of materials and fluid dynamics that are the foundation of the casting product and process development. This book has been written as a resource and design tool for product and process engineers and designers who work with aluminium castings. It combines many aspects of product and process development, which include the basic principals of static mechanics and fluid dynamics as well as completely developed applications allowing solving problems at every stage of the development process. This book has five main parts: (1) overview of casting processes, (2) fluid dynamics, (3) strength of materials, (4) sand casting, permanent mould, and die casting process development, and (5) quality control. Casting of Light Metals
1(12)
Casting Processes
1(1)
Sand Casting
1(2)
Gating System
2(1)
Risers and Chills
2(1)
Permanent Mould
3(2)
Gravity Casting
4(1)
Low-pressure Permanent Mould Casting
4(1)
Counterpressure Casting
4(1)
Die Casting
5(8)
Die-cast Process
5(3)
Die-cast Dies
8(1)
Runner System
8(3)
Cavity of Die-cast Die
11(1)
Air Ventilation System
11(1)
Ventilation Blocks
12(1)
Introduction to Fluid Dynamics
13(30)
Basic Concepts
13(5)
Pressure
13(1)
Viscosity
14(2)
Temperature and Enthalpy
16(2)
Equations of Motion
18(1)
Boundary Conditions
19(4)
Velocity Boundary Conditions at Walls
20(1)
Thermal Boundary Conditions at Walls
20(1)
Free Surface Boundary Conditions
21(2)
Useful Dimensionless Numbers
23(3)
Definitions
23(1)
The Reynolds number
24(1)
The Weber Number
24(1)
The Bond Number
25(1)
The Froude Number
25(1)
The Bernoulli Equation
26(1)
Compressible Flow
26(9)
Equation of State
27(1)
Equations of Motion
28(1)
Specific Heats
29(2)
Adiabatic Processes
31(1)
Speed of Sound
31(2)
Mach Number
33(1)
The Bernoulli Equation for Gases
33(2)
Computational Fluid Dynamics
35(8)
Computational Mesh
35(1)
Numerical approximations
36(2)
Representation of Geometry
38(1)
Free Surface Tracking
39(2)
Summary
41(2)
Part Design
43(54)
Design of Light Metal Castings
43(1)
Static Analysis
43(3)
Moment of an Area
44(1)
Moment of Inertia of an Area
44(2)
Loading
46(1)
Stress Components
47(8)
Linear Stress
48(2)
Plane Stress
50(1)
Mohr's Circle
51(4)
Hooke's Law
55(1)
Saint-Venant's Principle
56(1)
Criteria of Failure
57(1)
Ductile Material Failure Theory
58(1)
Brittle Material Failure Theory
58(1)
Beam Analysis
58(13)
Free Body Diagram
67(1)
Reactions
67(1)
Buckling
68(3)
Bending Stresses
71(5)
Normal Stresses in Bending
72(2)
Shear Stress
74(2)
Stresses in Cylinders
76(6)
Press-fit Analysis
82(4)
Thermal Stresses
86(1)
Torque
87(6)
Stress Concentration
93(1)
Fatigue
94(2)
MATLAB® Functions Used in Chapter 3
96(1)
Process Design
97(60)
Evaluation of Dimensionless Numbers
97(3)
Gravity Pour
98(1)
High-pressure Die Casting: Slow Shot
98(1)
High-pressure Die Casting: Fast Shot
99(1)
Flow in Viscous Boundary Layer
100(2)
The Bernoulli Equation
102(6)
Stagnation, Dynamic and Total Pressure
102(1)
Gravity Controlled Flow
103(1)
Flow in the Runner System
104(2)
Filling Rate
106(2)
Flow in a Shot Cylinder
108(8)
Gas Ventilation System
116(9)
Ventilation Blocks
125(1)
Little's Formula
126(1)
Poisson Process and the Exponential Distribution
127(5)
Cooling
132(9)
Lumped-temperature Model
132(6)
Heat Flow into a Semi-infinite Medium
138(3)
CFD Simulations
141(16)
High-pressure Die Casting
142(10)
Gravity Sand Casting
152(5)
Quality Control
157(8)
Basic Concepts of Quality Control
157(1)
Definition of Quality
158(1)
Definition of Control
158(1)
Statistical Process Control
159(1)
Tabular Summarization of Data
160(1)
Numerical Data Summarization
160(5)
Normal Probability Distribution
161(1)
Poisson Probability Distribution
162(3)
Appendix
165(8)
Unit Conversions
165(6)
Prefixes
171(2)
References
173(2)
Index
175
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