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Why Should CNC Machine Center Tools Be Passivated

May 12, 2020

Many friends have such doubts. The CNC tools used by CNC Machine Center are not as fast as possible. Why do they need to be passivated? In fact, tool passivation is not a literal meaning to everyone, but a way to increase the service life of the tool. Improve tool quality through smoothing, polishing, deburring and other processes. This is actually a normal process after the tool is ground and before the coating.

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The tool will be sharpened by the grinding wheel before the finished product, but the sharpening process will cause different degrees of micro-notches. While CNC Machine Center is performing high-speed cutting, the micro-notches will be extremely easy to expand, speeding up tool wear and damage. Modern cutting technology has strict requirements on the stability and precision of tools, so CNC tools must be passivated by the cutting edge before coating to ensure the firmness and service life of the coating.

What are the benefits of tool passivation?

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1. Resistance to physical wear of cutters

During the cutting process, the surface of the tool will be gradually worn by the workpiece. During the cutting process, the cutting edge is also prone to plastic deformation under high temperature and high pressure. Passivation of the tool can help the tool increase rigidity and prevent the tool from prematurely losing cutting performance.

2. Maintain the finish of the workpiece

Burrs on the cutting edge of the tool will cause the tool to wear out and the surface of the processed 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.

3. Convenient chip removal

Polishing the tool groove can improve the surface quality and chip evacuation performance. The flatter and smoother the groove surface, the better the chip evacuation and the more consistent cutting.

After the passivation and polishing of CNC machine center CNC tools, many small holes will be left 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 cutting process. speed.

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