Page 11 - Diamond tools

1-6 Technology
Selecting cutting edge geometry
It is crucial to select the optimal cutting edge geometry of tools to ensure long service life, good surface quality and short manu- facturing times.
• Clearance angle α Reduction in friction
• Lip angle β
The softer the material being machined, the smaller the lip angle that should be selected and the smaller the build-up of burrs, but the service life of the cutting edge will also be reduced.
• Chip angle γ
The softer the material being machined, the larger the chip angle that should be selected. Hard or brittle materials, on the other hand, require no chip angle or even a negative one.
Durability comparison
PCD vs. CVD
When using CVD, the durability (or service life) compared with PCD increases as follows:
Material
Durability longer
Aluminum
2 – 6 times
Copper/brass
2 – 6 times
CFK/GFK
3 – 6 times
Graphite
2 – 5 times
Glass reinforced plastics
2 – 10 times
Aluminum composites
2 – 7 times
Magnesium
2 – 6 times
Tungsten
2 – 4 times
Fiber composites
3 – 6 times
Titanium
2 – 5 times
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