Chapter22ba

Chapter22ba - ©2003 Bil Young 1 Materials & Processes...

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Unformatted text preview: ©2003 Bil Young 1 Materials & Processes in Manufacturing ME 151 Chapter 22 Cutting Tools for Machining ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 2 Introduction Introduction Success in metal cutting depends on the selection of the proper cutting tool, both _______ and ________, for a given work material The cutting tool is the most critical part of the machining system Wide range of cutting tool materials are available Types of cutting tool materials: • High Carbon Steel • Low / Medium Alloy Steel • High Speed Steel (HSS) - [Coated & Uncoated] • Sintered (Cemented) Carbides - [Coated & Uncoated] • Ceramics • Cermets • Sintered Polycrystalline Cubic Boron Nitride (CBN) • Sintered Polycrystalline Diamond • Single Crystal Natural Diamond ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 3 Evolution of Cutting Tool Materials Evolution of Cutting Tool Materials ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 4 Cutting Tool Material Selection Cutting Tool Material Selection The tool material, cutting parameters, and tool geometry directly influence machining operation ______________ Tool selection is influenced by: • Work Material Characteristics (Chemical & Metallurgical) • Part Characteristics (Geometry, Accuracy, Finish) • Machine Tool Characteristics (Rigidity, HP, Speed & Feed Ranges) • Support System (Operator, Sensors, Controls, Lubrication) ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bil Young 5 Cutting Tool Characteristics Cutting Tool Characteristics Desirable cutting tool characteristics: • High hardness (most critical characteristic) • Resistance to abrasion, wear, chipping of the cutting edge • High toughness (impact strength) • High “_____” hardness (ability to retain hardness at elevated temp.) • Strength to resist bulk deformation • Good chemical stability (non-reactive with work material) • Adequate thermal properties • High elastic modulus (stiffness) • Consistent tool life • Correct geometry and surface finish ___________________________________ ___________________________________ ___________________________________ ___________________________________...
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This note was uploaded on 04/19/2008 for the course ME 151 taught by Professor Alant.male during the Spring '08 term at Kentucky.

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Chapter22ba - ©2003 Bil Young 1 Materials & Processes...

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