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Parting and grooving

Troubleshooting in parting and grooving

CauseSolution​
Bad surface

  • Use a short and stable tool
  • Take away the chips - use geometry with good chip control
  • Check speed / feed guidelines
  • Use wiper geometry
  • Check tool set-up
Bad surface on aluminium


  • Select the sharpest geometry
  • Use geometry with good chip control
  • Select a special soluble oil for the material
Poor chip breakage

  • Change geometry
  • Select a higher feed
  • Use dwelling (pecking)
  • Increase coolant
Vibration


  • Use a stable set-up
  • Check speed/feed guidelines
  • Use shorter overhang
  • Change geometry
  • Check tool condition
  • Check tool set-up
Poor tool life


  • Check centre height
  • Check angle between tool and component
  • Check condition of the blade. If the blade is old,
    the insert could be unstable in the tip-seat
​

Insert wear

Insert edge problems

To achieve optimized cutting data, best possible workpiece quality and tool life, always remember to check the insert edge. At low speeds, built-up edge (BUE) and chipping are the main insert edge problems; at high speeds, plastic deformation (PD), flank wear and crater wear are the main problems. The solutions are presented in the following table.

 
​ Cause Solution
Built-up edge (B.U.E)

​
  1. Cutting edge temperature too low
  2. Unsuitable geometry or grade
  1. Increase cutting speed and/or feed
  2. Choose a geometry with a sharper edges preferably a PVD-coated grade
When parting to centre and on stainless material, it is almost impossible to avoid BUE. It is important to minimize this phenomenon by using the solutions above.
Chipping/breakage

​
  1. Too hard grade
  2. Too weak geometry
  3. Unstable conditions
  4. Too high cutting data
  1. Choose a softer grade
  2. Choose a geometry for higher feed area
  3. Reduce overhang. Check centre height
  4. Reduce cutting data
Plastic deformation (PD)

​		​
  1. Excessive temperature in cutting zone
  2. Unsuitable grade
  3. Lack of coolant supply
  1. Reduce cutting speed and/or feed
  2. Choose more wear resistant grade
  3. Improve coolant supply
Flank wear

​		​
  1. Cutting speed too high
  2. Too soft grade
  3. Lack of coolant supply
  1. Decrease cutting speed
  2. Choose a more wear resistant grade
  3. Improve coolant supply​
Crater wear

​		​
  1. Cutting speed too high
  2. Too soft grade
  3. Feed too high
  4. Lack of coolant supply
  1. Decrease cutting speed
  2. Choose more wear resistant grade
  3. Decrease feed
  4. Improve coolant supply​
Notch wear

​		​
  1. Oxidation at the cutting depth
  2. Cutting edge temperature too high
  1. Use varying cutting depths (ramping)
  2. Reduce cutting speed
 
 
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