Edge pre-treatment

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

Advantages of cutting-edge rounding:

  • Reduces chipping
  • 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
  • Higher cutting-edge stability
  • Avoids cutting-edge breakouts and flaking of the coating during the machining process
  • Increase of the tool’s lifespan despite a "blunt" cutting-edge
Cutting-edge rounding

Post-treatment

One of the problems that can arise without post-treatment of the surfaces is the jamming of the chips, which can cause a tool such as a drill to break

Objectives of post-treatment:

  • Removal of droplets after coating
  • Reduction of surface roughness
  • Improved chip-flow
If the post-treatment is too intense, the edge will become exposed

Exposed edges will lead to:

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