METAL CUTTING: Chatter marks

METAL CUTTING: Chatter marks

1. main reasons for vibration

   • part vibrates and tool bounces while cutting
   • machine vibrates
   • material inconsistency
   • discontinuous cutting shapes

2. Results

   • Low surface finish
   • Low dimensional accuracy
   • Damage to tool and machine
   • Excessive noise

3. Solutions

   • More stable machines
     • tuned damper
   • Rigid support for workpiece
   • Minimising tool overhang
   • Modify cutting geometry
   • Change cutting parameter
     • speed
     • depth
     • feed
     • fluids