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OBJECTIVES: M112 Cutting Tools
Use and understand the nomenclature of a cutting-tool point. Explain rake and clearance angles Identify various types of cutting-tool materials.
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M112 Cutting Tools CUTTING
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Basic Qualities of Tool Materials
Strength Hardness Resistance to heat Resistance to shock
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Tool Materials Strength
Tensile Compressive Transverse Rupture
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Tool Materials Hardness
Ability to resist penetration
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Tool Materials Resistance to Heat
High speed steel vs. carbon steel Red Hardness carbides and ceramics vs. high speed steel
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Tool Materials Resistance to Shock
High heat resistance = Low shock resistance
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Cutting Tool Materials
Carbon Tool Steels High Speed Steels Carbide Ceramics
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Single Point Tools Cutting Edges & Relief Angles Nose Radius
Top Face, Flank, and End Face Side & End Cutting Edge Angles Rake Angles
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Tool Wear Flank Wear Crater Wear Built-up Edge
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Review Q’s What four [4] qualities should a cutting tool material have? In what three [3] ways can the strength of a cutting tool be measured? What is added to steel to create high-speed steel? Why is high-speed steel superior to simple high-carbon steel? Name three [3] common materials used to make cutting tools. What is the purpose of a rake angle on a cutting tool? What is the purpose of side and end clearances on a tool?
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Questions?
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