The faster the CNC tool is, but not the better it is. Why do we need to passivate it?
In fact, tool passivation is not what everyone understands literally, but a way to increase the service life of the tool.
Improve the quality of the tool through processes such as flattening, polishing, and deburring.
This is actually a normal process after the tool is finely ground and before coating.
Tool passivation comparison:
The tool will be sharpened by a grinding wheel before it is finished, but the sharpening process will cause microscopic gaps of varying degrees.
When the machining center is cutting at high speed, the microscopic gaps will easily expand, accelerating the wear and damage of the tool.
Modern cutting technology has strict requirements on the stability and precision of the tool. Therefore, the CNC tool must be passivated before coating to ensure the firmness and service life of the coating.
The benefits of tool passivation are as follows:
- Resist physical wear of the tool
During the cutting process, the tool surface 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.
The passivation treatment of the tool can help the tool improve its rigidity and prevent the tool from losing its cutting performance prematurely.
- Maintain the smoothness of the workpiece
Burrs on the cutting edge of the tool will cause tool wear and the surface of the 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 be improved.
- Convenient groove chip removal
Polishing the tool groove can improve the surface quality and chip removal performance. The smoother the groove surface, the better the chip removal, and more consistent cutting can be achieved.
After passivation and polishing, the CNC tool of the machining center will leave many small holes on the surface. During processing, these small holes can absorb more cutting fluid, which greatly reduces the heat generated during cutting and greatly improves the speed of cutting.
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