Davim Wood Machining

1. Auflage 2013
ISBN: 978-1-118-60267-6
Verlag: John Wiley & Sons
Format: EPUB
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 288 Seiten, E-Book

Wood as an engineering material can be technically defined"as a hygroscopic, orthotropic, biological, and permeablematerial having extreme chemical diversity and physical complexitywith structures, that vary extensively in their shape, size,properties and function". Therefore, using wood to its bestadvantage and most efficiency in engineering applications, specificcharacteristics or chemical, physical and mechanical propertiesmust be considered.
The products are divided into two classes, solid wood and compositewood products. Solid wood includes shipbuilding, bridges, flooring,mine timbers, etc. Composite wood products include insulationboard, plywood, oriented strand board, hardboard and particleboard.
In recent years, the machining of wood products has acquired greatimportance due the short supply of wood and increasingenvironmental awareness among users and manufacturers. Theoptimization of the machining process centers around the mechanismof chip formation, tool wear, workpiece surface quality, crackinitiation and propagation of different types of wood. Otherfactors are also humidity, temperature, static preloads, andvibrations that can affect the wood during the machiningprocess.
The book provides some fundamentals and recent research advances onmachining wood and wood products.

Autoren/Hrsg.

Davim, J. Paulo

Inhaltsverzeichnis

Preface xi
Chapter 1. Machining of Wood and Wood Composites 1
Grzegorz KOWALUK
1.1. Introduction 1
1.2. Wood and wood-based composites 2
1.3. Approach to cutting 7
1.4. Main techniques of machining 11
1.5. Problems of machining wood and wood composites - areview 19
1.6. Into the future - further scenarios of wood and woodcomposites machining 21
1.7. Acknowledgement 23
1.8. Bibliography 24
Chapter 2. Wood and Wood-based Panel Machining Quality27
Cristina COELHO, Nuno GARRIDO, Jorge MARTINS, Luisa CARVALHO andCarlos COSTA
2.1. Solid wood machining 27
2.2. Wood-based panels machining 39
2.3. Surface quality 50
2.4. Case study: solid wood machining and surface qualityevaluation 65
2.5. Case study: particleboard machining and edge qualityevaluation 73
2.6. Bibliography 75
Chapter 3. Reducing Tool Wear by Cryogenic Treatment andCooling with Refrigerated Air when Processing Medium DensityFiberboard 83
Rado GAZO, Judith GISIP and Harold A. STEWART
3.1. Introduction 83
3.2. Effects of refrigerated air 85
3.3. Effects of cryogenic treatment and refrigerated air 98
3.4. Acknowledgements 111
3.5. Bibliography 111
Chapter 4. Wearing Mechanisms Contributing to Reduced ToolLife after Wood and Secondary
Wood Products Machining 115
Boles³aw PORANKIEWICZ
4.1. Introduction 116
4.2. Cutting edge-material cut interface 116
4.3. TGA indirect evidence of HTTR 119
4.4. Theoretical QC analysis of HTTR 134
4.5. Investigations of direct evidence of HTTR 140
4.6. Cutting edge SEM image examinations 143
4.7. Synergistic effect of high temperature reactions andmechanical wear 146
4.8. Final remarks 150
4.9. Conclusions 154
4.10. Acknowledgements 155
4.11. Bibliography 155
Chapter 5. Monitoring Surface Quality on Molding and SawingProcesses for Solid Wood and Wood Panels 159
Alfredo AGUILERA
5.1. Introduction 159
5.2. General concepts 160
5.3. Monitoring the cutting process 176
5.4. Surface roughness and quality for solid wood and panels190
5.5. Concluding remarks 210
5.6. Acknowledgements 211
5.7. Bibliography 211
Chapter 6. Evaluating the Roughness of Sanded Wood Surfaces217
Lidia GURAU, Hugh MANSFIELD-WILLIAMS and Mark IRLE
6.1. Introduction 217
6.2. Profile filtering applied to wood surfaces 228
6.3. A proposed method for separating processing roughness fromanatomical roughness 246
6.4. A case study: the processing roughness of oak surfacessanded with various grit sizes 250
6.5. Concluding remarks 259
6.6. Perspectives 260
6.7. Acknowledgements 261
6.8. Bibliography 261
List of Authors 269
Index 273