Metal Cutting Theory And Practice By Abhattacharyapdf Panchnaa File

Metal Cutting Theory and Practice Dr. Amitabha Bhattacharyya

• Sources of heat (primary shear zone, secondary friction zone).
• Measurement techniques (tool-work thermocouple, infrared).
• Effect of temperature on tool wear and surface integrity.

Practical Aspects of Metal Cutting

Tool Materials

| Tool Material | Hot Hardness | Toughness | Typical Use | |---------------|--------------|-----------|--------------| | HSS (M2, T1) | Moderate | High | Drills, taps | | Carbide (WC-Co) | High | Moderate | Turning inserts | | Ceramics | Very high | Low | High-speed finishing | | CBN | Extremely high | Low | Hard turning >45 HRC | | PCD | High (but not for ferrous) | Moderate | Aluminum, composites | Metal Cutting Theory and Practice Dr

1. Orthogonal cutting: The cutting tool is assumed to be orthogonal to the workpiece, which simplifies the analysis of the cutting process.
2. Plane strain: The cutting process is assumed to be a plane strain problem, which neglects the effects of strain in the direction perpendicular to the cutting plane.

1. Cutting tool materials: The cutting tool material should have high hardness, toughness, and thermal conductivity to withstand the high stresses and temperatures generated during cutting.
2. Cutting tool coatings: Cutting tool coatings, such as titanium nitride (TiN) and aluminum oxide (Al2O3), are used to improve tool life and reduce friction.
3. Machine tool selection: The machine tool should be selected based on its power, speed, and accuracy to ensure efficient and precise cutting.