In fact, tool passivation is not what people literally understand, but a way to improve the service life of tools. Improve tool quality through processes such as leveling, polishing, and deburring. This is actually a normal process for cutting tools after precision grinding and before coating. Many friends have this question: the CNC cutting tools used in machining centers are not as fast as possible. Why should passivation treatment be carried out?

    Cutting tools will undergo grinding with a grinding wheel before production, but grinding can cause varying degrees of micro notches. During high-speed cutting, micro notches in machining centers can easily expand, accelerating tool wear and damage. In modern cutting technology, there are strict requirements for the stability and precision of cutting tools. Therefore, CNC cutting tools must undergo passivation treatment on the cutting edge before coating to ensure the firmness and service life of the coating.

What are the benefits of tool passivation?

1. Resistance to physical wear of cutting tools

    During the cutting process, the tool surface will gradually be worn by the workpiece, and the cutting edge is also prone to plastic deformation under high temperature and pressure. The passivation treatment of cutting tools can help improve their rigidity and avoid premature loss of cutting performance.

2. Maintain the smoothness of the workpiece

    Burrs on the cutting edge of the tool can cause tool wear and the surface of the workpiece to become rough. After passivation treatment, the cutting edge of the tool will become very smooth, and the phenomenon of edge collapse will be correspondingly reduced, and the surface smoothness of the workpiece will also be improved.

3. Convenient groove chip removal

    Polishing the grooves of cutting tools can improve surface quality and chip removal performance. The smoother the groove surface, the better the chip removal, and more continuous cutting can be achieved.

After passivation and polishing, the CNC cutting tools in the machining center will leave many small holes on the surface. These small holes can adsorb more cutting fluid during processing, greatly reducing the heat generated during cutting and greatly improving the cutting speed.