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Many people have such doubts that the CNC tools used in the machining center are not as fast as possible, so why passivate it? In fact, tool passivation is not what everyone understands literally, but a way to improve the service life of the tool. Improve tool quality through processes such as leveling, polishing, and deburring. This is actually a normal process after the tool is finely ground and before coating.
The tool will be sharpened by a grinding wheel before the finished product, but the sharpening process will cause different degrees of microscopic gaps. When the machining center performs high-speed cutting, the micro-notch will be easily expanded, which will accelerate the wear and damage of the tool. Modern cutting technology has strict requirements on the stability and precision of the tool, so the CNC tool must be passivated before coating to ensure the firmness and service life of the coating.
During the cutting process, the surface of the tool will be gradually worn away by the workpiece, and the cutting edge is also prone to plastic deformation under high temperature and high pressure during the cutting process. Passivation of the tool can help improve the rigidity of the tool and prevent the tool from losing cutting performance prematurely.
Burrs on the cutting edge of the tool will cause the tool to wear and the surface of the machined workpiece will become rough. After passivation treatment, the cutting edge of the tool will become very smooth, the chipping phenomenon will be reduced accordingly, and the surface finish of the workpiece will also be improved.
Polishing the groove of the tool can improve the surface quality and chip evacuation performance. The smoother the groove surface, the better the chip evacuation, and the more consistent cutting can be achieved.
After the CNC tool of the machining center is passivated and polished, many small holes will be left on the surface. These small holes can absorb more cutting fluid during processing, which greatly reduces the heat generated during cutting and greatly improves the cutting efficiency. speed.
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