Burnishing

Burnishing:

It is a process in which we rub the metal surface with a hard tool by applying sufficient pressure. This leads to the plastic deformation of the surface materials which flattens the metal surface. This process produces a good surface finish. It can produce a surface finish of 0.05 to 0.2 μ Ra in one pass at a feed rate of 1500-3000 mm/minute.

Types of burnishing tools:

  • Internal diameter burnishing tool.
  • External diameter burnishing tool.
  • Taper burnishing tool.
  • Face burnishing tool.

Advantages of burnishing:

  • Finer finish in one pass.
  • Improved sizing.
  • Attachable to any standard machine tool.
  • Longer tool life.
  • No operator skill is required
  • Reduced noise level.
  • Faster production rate.

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