Manufacturing Processes

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Presentation transcript:

Manufacturing Processes Metal Cutting Manufacturing Processes

Outline Metal Cutting Chip Formation Processes Chip Formation Effects Control Conditions Back rake angle Shear angle Chip Formation Continuous formation Built up edge formation Discontinuous formation Effects Chip formation

Chip Formation Processes Shaping Turning Milling Drilling Sawing Broaching Grinding

Machining Operations

Machining Operations

Machining Operations - Sawing

Machining Operations - Grinding

Basic Cutting – Face Cutting

Basic Cutting – Pocket Cutting

Basic Cutting – Turning Diameters

Basic Cutting – Thread Cutting

Basic Cutting – Surface Grinding

Chip Formation Processes Control Feed Speed Depth of Cut Conditions Machining Process Machine Limitations Material Tool Type Tool material Surface Finish Tolerances

Chip Formation Processes Back rake angle, α The angle that the tool makes with respect to a vertical from the workpiece The chip is formed by shearing along the shear plane The shear plane or shear angle Φ is measured with respect to the horizontal Flank of the tool is the bottom of the tool not in contact with the material (clearance angle δ)

Cutting Definitions

Chip Formation

Continuous Chip Formation

Built Up Edge (BUE) Formation

Discontinuous Chip Formation

Chip Formation Three Characteristic types of chips Discontinuous Continuous with built-up edge

Three Types of Chips

Resulting Finishes of Chip Formation

Effect of Shear Angle

Summary Chip formation processes are designed to shear off layers of metal Control and conditions determine the type of chip formation The type of formation affects the resulting finish of the workpiece

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