Machinability Of Engineering Materials by B. MillsMachinability Of Engineering Materials by B. Mills

Machinability Of Engineering Materials

byB. Mills

Paperback | November 6, 2011

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In the manufacturing industries, despite the development and improvement of metal forming processes, a great deal of reliance is still placed on metal cutting processes and this will continue into the foreseeable future. Thus, there will continue to be a requirement for the development of improved cutting tool materials, workpiece materials, cutting fluids and testing methods; collectively this activity can be described as improving machinability. Machinability is a parameter which in many ways is vague, sometimes qualitative and very often misunderstood. The purpose of this text is to give a broad understanding of the concept, methods of assessment and ways of improving machinability to the manufacturing engineer, the metallurgist and the materials scientist. The text should also be of interest to those engaged in research in manufacturing engineering and metal cutting. The text, of necessity, does not attempt to give detailed information about the machining characteristics of a wide range of tool and workpiece materials. It is felt that this is beyond the scope of the book and is best left to other sources, such as machinability data banks and the Machining Handbook*, whose main objective is to present this kind of information. It is hoped that the reader will be able to progress logically from the fundamental aspects of the metal cutting process to the sections on the more specific topics of machinability including machinability testing and the properties of tool and workpiece materials which affect their machining performance.
Title:Machinability Of Engineering MaterialsFormat:PaperbackDimensions:9.02 × 5.98 × 0.68 inPublished:November 6, 2011Publisher:Springer NetherlandsLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:9400966334

ISBN - 13:9789400966338

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Table of Contents

1 The Concept of Machinability.- 1.1. Introduction.- 1.2. Definition of Machinability.- 2 Fundamental Aspects of the Machining Process.- 2.1. Mechanics of Metal Cutting.- 2.1.1. Chip formation.- 2.1.2. The effect of changes in cutting parameters on cutting forces.- 2.1.3. The effect of changes in cutting parameters on cutting temperatures.- 2.2. Tool Wear.- 2.2.1. Mechanisms of wear.- 2.2.2. Types of wear.- 2.2.3. Relationship between tool wear and time.- 2.2.4. Relationship between tool wear and cutting conditions.- 2.2.5. Relationship between tool life and temperature.- 2.2.6. Tool life criteria.- 2.3. Surface Finish.- 2.3.1. Introduction.- 2.3.2. Mechanism of surface finish production.- 2.3.3. Factors which influence surface finish production.- 2.4. Chip Formers.- 2.4.1. Mechanics of chip formers.- 2.4.2. Effect of cutting conditions on chip forming.- 2.4.3. Effect of chip formers on cutting forces.- 2.4.4. Effect of chip formers on tool wear.- 2.5. The Action of Cutting Fluids.- References.- 3 The Assessment of Machinability.- 3.1. Types of Machinability Test.- 3.2. Short Machinability Tests.- 3.3. Non-Machining Tests.- 3.3.1. Chemical composition tests.- 3.3.2. Microstructure tests.- 3.3.3. Physical properties tests.- 3.4. Machining Tests.- 3.4.1. The constant pressure test.- 3.4.2. The rapid facing test.- 3.4.3. Tapping tests.- 3.4.4. Degraded tool tests.- 3.4.5. Accelerated wear tests.- 3.4.6. High-speed-steel tool wear rate test.- 3.4.7. Taper turning test.- 3.4.8. Variable-rate machining test.- 3.4.9. Step turning test.- 3.5. Combination of Machining Parameters.- 3.6. Machinability Assessment for Processes Other than Single Point Turning.- 3.6.1. Introduction.- 3.6.2. Machinability assessment in drilling.- 3.6.3. Machinability assessment in milling.- 3.7. Machinability Assessment Relating One Process to Another.- 3.8. On-Line Assessment of Tool Wear.- References.- 4 Tool Materials.- 4.1. Historical Background.- 4.2. Requirements of Tool Materials.- 4.3. High-Speed Steels.- 4.3.1. Introduction.- 4.3.2. Structure of high-speed steels.- 4.3.3. Heat treatment of high-speed steels.- 4.3.4. Applications of high-speed steels.- 4.4. Cemented Carbides.- 4.4.1. Introduction.- 4.4.2. Classification of cemented carbides.- 4.4.3. Structure and properties of cemented carbides.- 4.4.4. Mixed cemented carbides bonded with cobalt.- 4.4.5. Coated cemented carbides.- 4.4.6. Titanium carbide cemented carbides.- 4.5. Cast Cobalt Alloys.- 4.6. Ceramic Cutting Tool Materials.- 4.7. Diamond.- References.- 5 Workpiece Materials.- 5.1. Introduction.- 5.2. Ferrous Materials.- 5.2.1. Carbon steels.- 5.2.2. Free-machining steels.- 5.2.3. Stainless steels.- 5.2.4. Cast irons.- 5.3. Titanium Alloys.- 5.4. Nickel-Based Alloys.- 5.5. Aluminium Alloys.- 5.6. Magnesium and its Alloys.- 5.7. Copper and its Alloys.- References.- 6 The ISO Machinability Test.- 6.1. Introduction.- 6.2. Reference Work pieces.- 6.3. Reference Tool Materials and Tool Geometries.- 6.4. Reference Cutting Fluids.- 6.5. Cutting Conditions.- 6.6. Tool Life Criteria and Tool Wear Measurements.- 6.7. Tool Wear Measurement.- 6.8. Equipment.- 6.9. Tool Life Test Procedure.- 6.10. Evaluation of Tool Life Data.- 7 The Effect of Machinability Data on Metal Removal Performance and Economics.- 7.1. Introduction.- 7.2. Criteria of Performance.- 7.3. Economics of Turning Operations.- 7.4. Machining for Minimum Cost.- 7.5. Machining for Maximum Production.- 7.6. Machining for Maximum Profit.- 7.7. Machinability Data Applied to Milling.- 7.8. Reliability of Machinability Data.- Reference.- Appendix 1 Analysis to Determine Cutting Temperatures in Single Point Metal Cutting.- Appendix 2 Analyses for Two Short Absolute Machinability Tests.- A2.1 The Variable-Rate Machining Test.- A2.2 The Step Turning Test.