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.

What are the benefits of tool passivation?

Resist physical tool wear

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.

Maintain the finish of the workpiece

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.

Convenient groove chip removal

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.

How to take care of it?

• Before operating the machining center, wear various labor protection equipment, carry out lubrication and maintenance as required, and check the oil level of each lubricating oil.

• When clamping the workpiece, it should be handled lightly to prevent bumps and damage to the work surface; when the workpiece of the machining center is heavy, the bearing capacity of the machine tool table should also be verified, and the machining center is not allowed to run overloaded.

• The machining program should be checked first before it can be run. When using the high-speed function of the machining center, the matching of the tools should be confirmed.

• After the machine tool of the machining center is started, check whether the movement of the spindle and the worktable in all directions is normal, and whether there is abnormal noise.

• In the process of processing, you should always pay attention to whether the movement and processing state of the machine tool is normal, and encounter abnormal phenomena. When there is noise and alarm, it should be stopped immediately for inspection and processing, and the processing center can continue processing after the fault is eliminated.

Conclusion

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