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E-raamat: Mechanics of Wood Machining

  • Formaat: PDF+DRM
  • Ilmumisaeg: 16-Jul-2012
  • Kirjastus: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • Keel: eng
  • ISBN-13: 9783642299551
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  • Formaat: PDF+DRM
  • Ilmumisaeg: 16-Jul-2012
  • Kirjastus: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • Keel: eng
  • ISBN-13: 9783642299551
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This updated textbook combines the quantitative, mathematical analysis of the mechanisms of wood processing with a host of practical recommendations and solutions, assembling material from numerous sources and including the latest research results.

Wood is one of the most valuable materials for mankind, and since our earliest days wood materials have been widely used. Today we have modern woodworking machine and tools; however, the raw wood materials available are continuously declining. Therefore we are forced to use this precious material more economically, reducing waste wherever possible.This new textbook on the “Mechanics of Wood Machining” combines the quantitative, mathematical analysis of the mechanisms of wood processing with practical recommendations and solutions. Bringing together materials from many sources, the book contains new theoretical and experimental approaches and offers a clear and systematic overview of the theory of wood cutting, thermal loading in wood-cutting tools, dynamic behaviour of tool and work piece, optimum choice of operational parameters and energy consumption, the wear process of the tools, and the general regularities of wood surface roughness. Diagrams are provided for the quick estimation of various process parameters.This book will be useful for scientists, graduate and postgraduate students, and practising engineers seeking a deeper understanding of physical phenomena associated with real woodworking processes.
1 Mechanics of the Cutting Process
1(30)
1.1 Definitions and Notations
2(2)
1.2 Mechanics of Cutting
4(13)
1.2.1 Force and Stress Relations
5(3)
1.2.2 The Cutting Force
8(2)
1.2.3 Chip Deformation
10(2)
1.2.4 Chip Deformation with Plastic Flow
12(2)
1.2.5 The Radial Cutting Force
14(3)
1.3 Mechanics of Oblique Cutting
17(5)
1.4 Mechanics of Bundle Clipper
22(2)
1.5 Mechanics of the Pressure Bar
24(7)
References
29(2)
2 Thermal Loading in Cutting Tools
31(14)
2.1 Heat Generation in the Contact Surfaces
31(3)
2.2 Boundary Conditions
34(3)
2.3 The Temperature of the Tool in Different Operating Conditions
37(8)
References
44(1)
3 Operating Parameters of Wood Cutting Tools
45(30)
3.1 The Bandsaw
45(3)
3.2 The Frame Saw
48(5)
3.3 The Circular Saw
53(2)
3.4 Milling and Planing Machines
55(6)
3.5 Drills
61(4)
3.6 Veneer Cutting and Peeling
65(2)
3.7 Sanding
67(8)
References
73(2)
4 The Energy Requirement of Cutting
75(14)
4.1 Theoretical Considerations
75(3)
4.2 The Energy Requirements of Bandsaw
78(1)
4.3 The Energy Requirements of Frame-Saw
79(3)
4.4 The Energy Requirements for Planing and Milling
82(2)
4.5 Energy Requirements of Circular Saws
84(5)
References
87(2)
5 Vibration of the Tools and Workpieces
89(38)
5.1 Band Saw Vibration
89(7)
5.2 The Vibrations of Circular Saws
96(13)
5.3 Washboarding
109(3)
5.4 The Vibrations of the Workpiece
112(7)
5.5 Pneumatic Clamping of a Workpiece
119(8)
References
125(2)
6 The Stability of Wood Working Tools
127(30)
6.1 Cutting Accuracy
128(2)
6.2 Blade Tensioning
130(11)
6.3 The Stability of the Band Saw
141(3)
6.4 Band Saw Tracking Stability
144(3)
6.5 Stability of Circular Saws
147(3)
6.6 Frame Saw Stability
150(7)
References
155(2)
7 Tool Wear
157(10)
7.1 Edge Profile and Change in Cutting Force
157(3)
7.2 The Major Tool Wear Mechanisms
160(2)
7.3 Factors Affecting Wear
162(5)
References
166(1)
8 Surface Roughness
167(28)
8.1 Parameters of Surface Roughness
168(1)
8.2 The Internal Structure of Wood
169(6)
8.3 The Origin of Surface Roughness
175(4)
8.4 The Effects of Machining Process on Surface Roughness
179(1)
8.5 Internal Relationships Between Roughness Parameters
180(5)
8.6 The Use of Structure Number
185(5)
8.7 Effects of Tool Wear on the Surface Roughness
190(2)
8.8 Scattering of Roughness Data
192(3)
References
194(1)
Index 195