- Machining is a subtractive manufacturing technique where raw material is cut, shaped, or finished into a final product.
- Different machining methods are chosen based on required precision, cost, number of parts to be produced, and type of material to be processed.
Types of Machining Processes
- Involves spinning the workpiece while a fixed cutting tool is applied, removing material.
- Used for creating round or tubular shapes.
- Lathe machines: Most common tool for turning, creates precision parts.
- Rotates a cutting tool against a fixed workpiece.
- Works by chip formation and displacement.
- Capable of producing intricate parts including irregulary-shaped objects.
- Involves creating or finishing holes in a workpiece.
- Drill bits rotate and penetrate the surface of the workpiece.
- Commonly used in conjunction with other machining processes.
- Utilised to finish workpieces and provide high-quality surface finish and detail.
- Operates by using an abrasive wheel as the cutting tool.
- Types include surface grinding, cylindrical grinding, and centerless grinding.
Tools and Equipment
- CNC or Computer Numerical Control machines control exact velocity and positioning.
- Drastically reduce the chance of human error and offer high precision.
- Able to work with a range of materials including metal, plastic, and wood.
Safety in Machining
- It’s critical to understand and follow health and safety guidelines in any machining environment.
- Involves wearing protective gear, keeping a clean work area, and proper handling and storage of tools.
- Knowledge of emergency procedures, including machine shutdown, is key.
Waste and Recycling
- Machining processes often produce metal chips or swarf.
- This waste can be hazardous and needs to be properly managed.
- Many types of metal waste generated from machining processes can be recycled.