06/07/2024
🔧 Top 6 Tips for CNC Turning of Copper 🔧
CNC turning of copper presents unique
challenges due to its softness, high ductility, and tendency to work harden.
Here are top tips to achieve optimal results:
1- Tool Selection and Material
Use Sharp Tools: Copper is abrasive; sharp tools are essential for
clean cuts and prolonged tool life. Consider tungsten carbide or diamond-coated
tools.
Tool Geometry: Opt for tools with a positive rake angle and high
clearance to reduce cutting forces and prevent work hardening.
2-Cutting Parameters
Speed and Feed Rates: Copper requires high cutting speeds but moderate
feed rates. Start with a high surface speed (e.g., 300-1000 m/min) and adjust
based on the specific copper alloy.
Depth of Cut: Use a moderate depth of cut to prevent excessive
heat buildup and tool wear.
3-Coolant and Lubrication
Proper Cooling: Ample coolant prevents heat buildup, which can
cause tool wear and work hardening. Water-soluble coolants work well.
Lubrication: Ensure good lubrication to reduce friction and
improve surface finish.
4-Chip Management
Chip Breaking: Copper produces long, continuous chips. Use chip
breakers to avoid entanglement and potential damage.
Clear Chips Frequently: Maintain a smooth machining process by clearing
chips from the cutting area.
5-Workholding and Fixturing
Secure Clamping: Avoid excessive pressure to prevent deformation.
Soft jaws or delicate material fixtures work best.
Minimize Vibration: Firmly hold the workpiece to enhance surface finish and tool life.
6-Tool Path and Strategy
Consistent Cutting Path: Plan the tool path to maintain consistent forces
and prevent work hardening.
Finish Passes: Use light finish passes for the desired surface
finish without introducing excess heat or stress.
Implementing these tips will lead to
better results when CNC turning copper, enhancing efficiency, surface finish,
and tool longevity. 🛠️🔍👷♂️
Using our own advise, these are some copper bushes we manufactured this week on our Hurco TM8i