Why do automatic transfer machine knives need to be passivated? Many people have such a question, the CNC tool used in the machining center is not the faster the better, why should it be passivated? In fact, tool passivation is not a literal meaning, but a way to improve the service life of the tool. Today we are talking about "Why do automatic transfer machine knives passivation?" When the content is shared, it is also explained whether the tools of other CNC lathes need passivation.

automatic transfer machine tool how to do passivation? Improve tool quality by leveling, polishing, deburring and other processes. This is actually a normal process after the tool is polished and before the coating.

What is tool passivation?

By deburring, flattening and polishing the tool, the quality of the tool is improved and the service life is extended. After the tool is polished, a process before the coating, its name is not unified at home and abroad, there are "Edge passivation", "edge strengthening", "edge honing", "edge preparation" or "ER (Edge Radiusing) treatment" and so on.

Why are tools passivated?

In fact, at the beginning of the article, we have said that the specific function of CNC machine tools, carefully speaking, is: after the ordinary grinding wheel or diamond grinding wheel, the cutting edge of the tool, there are different degrees of micro-notch (that is, the micro edge and the saw edge). In the cutting process, the micro-notch of the cutting edge of the tool is easy to expand, which accelerates the tool wear and damage.

Modern high-speed machining and automatic machine tools put forward higher requirements for tool performance and stability, especially the coating tool must be passivated before coating, in order to ensure the robustness and service life of the coating.

What is the purpose of tool passivation?

Edge passivation technology, its purpose is to solve the grinding tool edge micro-notch defects, so that its edge value is reduced or eliminated, to achieve smooth, sharp and durable purpose.

So what is the main effect of tool passivation?

Rounding of the edge: remove the edge burrs and achieve accurate and consistent rounding processing.

Cutting edge burr leads to tool wear, the surface of the workpiece will become rough, after passivation treatment, the cutting edge becomes very smooth, greatly reducing the edge, the workpiece surface finish will also improve.

What is the polishing treatment of the row cutting?

Uniform polishing of tool grooves to improve surface quality and cutting performance.

The smoother the surface of the groove, the better the chip removal, and the higher speed of cutting can be achieved. At the same time, the surface quality is improved, and the risk of biting the tool and the processing material is reduced. And can reduce the cutting force by 40%, cutting more smoothly.

How to polish the coating?

Remove the protruding droplets produced after the tool coating, improve the surface finish and increase the adsorption of lubricating oil.

The surface of the coated tool will produce some small protruding droplets, which improves the surface roughness, makes the tool easy to produce large friction heat during the cutting process, and reduces the cutting speed. After passivation polishing, the droplets are removed, while leaving many small holes, which can absorb more cutting fluid during processing, so that the heat generated during cutting is greatly reduced, which can greatly improve the speed of cutting.

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