Edge pre-treatment

Edge pre-treatment is a very important process in a turnkey system to utilize the full potential of a coating.
The main aim of the edge pre-treatment is to increase the stability of an edge and thus the performance of a tool.

Advantages of cutting-edge rounding:

  • Low roughness of the edge surface
  • Reduces what is referred to as an “antenna effect” in PVD coatings on sharp edges and thus reduces the stress in the coating
  • The more an edge is rounded, the thicker the coatings can be
  • Prevents chipping of the edge and decreases friction between a tool and a workpiece
  • Higher cutting-edge stability
  • Despite a “blunt” cutting-edge, increase in tool’s lifespan
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Post-treatment

If surfaces are not post-treated, chips can block drill holes and cause the tool to break

Objectives of post-treatment:

  • Removal of droplets after coating
  • Reduction of surface roughness
  • Improved chip-flow
  • Reduction of the “antenna effect”
  • Reduction of coating breakouts
If the post-treatment is too excessive, the edge becomes exposed

Exposed edges lead to:

  • Immediate full and direct contact of the cutting-edge with the workpiece material
  • Low heat and chemical isolation
  • Thin coating thickness near the cutting-edge
  • A larger cutting-edge radius, which results in a larger surface area without a coating
  • The impression of a defective coating

Different materials and tools require different methods of pre- and post treatment

The most common edge pre-treatment methods are dry blasting, wet blasting, drag grinding, brushing and magnet finish.
The most common post-treatment methods include wet blasting, drag grinding and polishing.

PLATIT has a broad competence and offers as well as integrates all products necessary for the turnkey system. Find more information about the pre- and post-treatment procedures in our compendium p.58 - p.68 by clicking here or contacting us directly.

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