What is tool passivation?
Improve tool quality and prolong tool life by deburring, leveling, and polishing the tool. The name of a process before coating after finishing grinding of a tool is not uniform at home and abroad, such as "blade passivation", "blade strengthening", "blade honing", "blade preparation" or "ER (Edge Radiusing) treatment", etc.
Why tool passivation?
After grinding the cutting edge of an ordinary grinding wheel or diamond grinding wheel, there are different degrees of micro-notch (i.e. micro-chipped edge and saw mouth).In the cutting process, the micro-notch of the cutting tool is easy to expand and accelerate the wear and damage of the tool.
Modern high-speed cutting and automatic machine tools have put forward higher requirements for tool performance and stability. In particular, the coated tool must be passivated before being coated, so as to ensure the fastness and service life of the coating.
The purpose of tool passivation
The purpose of the blade passivation technology is to solve the defects of the micro gap of the blade after the blade is sharpened so that the edge value can be reduced or eliminated to achieve the purpose of smooth and smooth, sharp, and strong and durable.
Main effects of tool passivation
Cutting edge rounding: to remove burrs and achieve accurate and consistent rounding.
Cutting edge burr will cause tool wear, and the surface of the processed workpiece will also become rough. After passivation, the cutting edge will become very smooth, greatly reducing the breaking edge, and the surface finish of the workpiece will also improve.
The polishing treatment of the cutting groove
The uniform polishing of the tool groove can improve the surface quality and cutting performance.
The smoother and smoother the groove surface, the better the chip removal, and the higher the cutting speed. At the same time, the surface quality is improved, but also reduce the risk of tool and processing material bite. And can reduce 40% cutting force, cutting smoother.
Polishing of coating
Remove the protruding droplets produced by the tool coating, improve the surface finish, and increase the absorption of lubricating oil.
The coated tool surface will produce some small protruding droplets, which improves the surface roughness and makes the tool prone to generate greater friction heat during the cutting process, reducing the cutting speed. After passivation and polishing, the droplets are removed and many holes are left, which can absorb more cutting fluid during machining and greatly reduce the heat generated during cutting, which can greatly improve the cutting speed.