Milling hardened steels from 55-70 HRc

Advantages:

  • No electrical discharge machining required, milling is much more productive
  • Program also in micro’s available
  • Extreme high surface quality
  • a single clamping for more accurate results

Different strategies possible:

HPM (High Performance Machining) HSM (High Speed Machining)
·         High cutting speed (Vc)

·         Large cutting depth (Ap)

·         Small cutting width (Ae)

·         Medium feed per tooth (Fz) / table feed (Vf)

·         High cutting speed (Vc)

·         Small cutting depth (Ap)

·         Small cutting width (Ae)

·         Medium feed per tooth (Fz) / table feed (Vf)

Tips:

  • Use a rigid milling machine and clamping method
  • Try to minimize entering and exiting the workpiece
  • The use of minimum lubrication or oil-mist-spray is recommended

Leading technology for hardened steels (55-70 HRc):

  • 2 Flute ballnose geometry from 0,1 mm: VHPK
  • 4 Flute torus geometry from 0,2 mm: VHPT
  • Multiple flute, available with extra teeth for high productivity: VHPM
  • Multiple flute with corner radius and extra teeth: VHPMR

Coating:

  • Multi-layer coating
  • Extreme high tool life due to nano-structure
  • Extreme hardness

Depending on the workpiece, different strategies can be applied. Chip removal, cooling and positioning in such applications are crucial for a successful process.