The rear knife face is worn

• 
  why

  Excessive wear leads to short tool life.

  vibration

  Chips are cut again

  Burr forms on the parts

  Poor surface quality

  Generate heat

  Too much noise

  The solution

  Increase the feed fz

  Down milling

  Compressed air is used to effectively remove debris

  Check recommended cutting parameters

  • 
    why

    Uneven wear that causes damage to fillet corners.

     

    Tool to beat

    vibration

    Short tool life

    Poor surface quality

    The noise is big

    Excess radial force

    The solution

    • Crescent pits wear away

      
      why

      Excessive wear will weaken the cutting edge. Damage to the trailing edge of the cutting edge can result in a surface quality

       

      In quantity.

      Diffusion wear is caused by high cutting temperature on the front cutter face

       

      The solution

      Select the AL203 coating grade

      The groove shape of the positive front Angle blade is selected

      First, reduce the cutting speed to reduce the temperature, and then reduce the feed

       

      • Plastic deformation

        
        why

        Cutting edge plastic deformation, sag or after cutter face depression, resulting in poor chip control,

        Poor surface quality and blade rupture.

        Excessive cutting temperature and pressure

        The solution

        Opt for a more durable (hard) brand

        Reduce the cutting speed VC

        Lower feed fz

         

        • Collapse edge

          
          
          why

          The uncut portion of the cutting edge is damaged due to chip impact. The upper cutting face and branch of the blade

          Braces can be damaged, resulting in poor surface texture and excessive rear surface grinding Loss.

          The chip folds back to the cutting edge

          
          The solution

          Choose a brand with greater toughness

          Choose a blade with a stronger cutting edge

          Increase the cutting speed VC

          Select a positive front corner groove

          Reduce the feed at the beginning of cutting

          Improved stability

           

          • 
            why

            Fine chipping of the cutting edge leads to poor surface quality and excessive wear of the rear surface.

            Brand is too fragile

            The groove of the blade is too weak

            The devolop tumor

             

            The solution

            Choose a brand with greater toughness

            Choose a blade with higher groove strength

            Increase the cutting speed VC or choose positive front Angle groove

            Reduce the feed at the beginning of cutting

             

            Groove wear

            
            why

            Groove wear can cause surface quality degradation and cutting edge fracture.

            Work hardened material

            Skin and rust

            The solution

            Reduce the cutting speed VC

            Choose a brand with greater toughness

            Increase the cutting speed VC

             

             

            cracking
            
            
            why

            Small cracks perpendicular to the cutting edge will cause blade fragmentation and surface quality degradation.

            Thermal cracks due to temperature changes are caused by:

             

            Continuous processing

            Variable cutting fluid supply

             

            The solution

            Choose a toughness brand that can withstand thermal shock

            Cutting fluid should be supplied in abundance or not at all.

             

            The devolop tumor (B.U.E)

            

            why

            The chip nodules will cause the surface quality to be reduced and the cutting edge will be caused when the chip nodules are removed

            Collapse.

            Cutting zone temperature is too low.

            Extremely viscous materials, such as mild steel, stainless steel, and aluminum.

            The solution

            Increase cutting speed

            Replace to a more suitable blade groove

            
            why

            The workpiece material is bonded to the cutting edge because:

            Low cutting speed VC

            Low feed fz

            Negative rake Angle cutting groove

            Poor surface quality

            The solution

            Increase the cutting speed VC

            Increase the feed fz

            Select a positive front corner groove

            Use oil mist or cutting fluid