Техническая информация Sumitomo - страница 13

Предыдущая страница Следующая страница

Навигация

Troubleshooting for Endmilling

■ Troubleshooting for Endmilling

Failure Cause Remedies

Excessive Wear Cutting Conditions Cutting speed is too fast Decrease cutting speed and feed rate.

  • Feed rate is too fast
Tool ShapeThe flank relief angle is too smallChange to an appropriate flank relief angle
Tool MaterialInsufficient wear resistanceSelect a substrate with more wear

resistance

  • Use a coated tool

Chipping Cutting Conditions Feed rate is too fast Decrease cutting speed.

  • Cutting depth is too deep
  • Reduce depth of cut
  • Tool overhang is too long
  • Adjust tool overhang for correct length

Machine Area Work clamps are weak Clamp the work piece firmly

  • Tool is not firmly attached
  • Make sure the tool is seated in the chuck properly

Tool Fracture Cutting Conditions Feed rate is too fast Decrease cutting speed.

  • Cutting depth is too deep
  • Reduce depth of cut
  • Tool overhang is too long
  • Reduce tool overhang as much as possible
  • Cutting edge is too long
  • Select a tool with a shorter cutting edge

Tool Shape Web thickness is too small Change to more appropriate web thickness

Shoulder Deflection Cutting Conditions Feed rate is too fast Decrease cutting speed.

  • Cutting depth is too deep
  • Reduce depth of cut
  • Tool overhang is too long
  • Adjust tool overhang for correct length
  • Cutting on the down-cut
  • Change directions to up-cut

Tool Shape Helix angle is large Use a tool with a smaller helix angle

  • Web thickness is too thin
  • Use a tool with the appropriate web thickness

Unsatisfactory Machined Surface Finish

Cutting Conditions

  • Feed rate is too fast
  • Decrease cutting speed.
  • Packing of chips
  • Use air blow
  • Use an insert with a larger relief pocket.

Chattering Cutting Conditions Cutting speed is too fast Decrease the cutting speed

  • Cutting on the up-cut
  • Change directions to down-cut
  • Tool overhang is too long
  • Adjust tool overhang for correct length
Tool ShapeRake angle is largeUse a tool with an appropriate rake angle
Machine AreaWork clamps are weakClamp the work piece firmly
  • Tool is not firmly attached
  • Make sure the tool is seated in the chuck properly

Packing of Chips Cutting Conditions Feed rate is too fast Decrease cutting speed.

  • Cutting depth is too deep
  • Reduce depth of cut N

Tool Shape Too many teeth Reduce number of teeth

  • Packing of chips
  • Use air blow