FRÄSEN IN DEN ECKEN

Milling inside corners requires careful consideration of the appropriate milling arc and the appropriate feed rate.

Considerations

  • When inserting the cutter into the inner corners, the radial arc of the latch will increase and place additional demands on the cutting edge.
  • The process often becomes unstable, creating vibrations and an uncertain result.
  • Fluctuations in cutting forces often result in corner trimming.
  • There is a risk of breaking the edges of the tool or complete failure of the tool.
  •  

Traditional corner milling

Angle radius = 50% x DC

Solution - limit the arc

Use a programmed radius (circular milling) to reduce the grip arc and a radial cut to reduce vibration tendencies. This will allow for greater depths of cut and feed rates when milling within corners.

  • Mill the larger radius of the corner as shown in the drawing. This can sometimes be convenient as it allows the use of a larger cutter diameter in rough machining, which maintains high productivity.
  • Alternately use a smaller DC cutter to cut the desired angle radius.

Mill the larger radius of the component,

Angle radius = 75% x DC

Use a smaller cutter

Angle radius = 100% x DC

Roughness

The programmed radius of 50% direct current is optimal.

Completion

To conclude, it is not always possible to have such a large radius; however, the diameter of the cutter must not exceed the radius of component 1.5, e.g. corner radius 10 mm (0.394 inches) = maximum 15 mm (0.591 inches).

 

Are you interested in milling services?

See our offer:

COARSE MILLING

CNC MILLING

For all questions we are at your disposal:

CONTACT

 

Source: Sandvik Coromant