About machining tool passivation

Wed Jun 08 11:42:53 CST 2022

1: What is tool passivation

By deburring, leveling and polishing the cutting tool, improve the tool quality and prolong the service life. The name of the process of cutting tool after fine grinding and before coating is not unified at home and abroad, such as "edge passivation", "edge strengthening", "edge honing", "edge preparation" and so on.

2: Why do you want to do tool passivation

After grinding with ordinary grinding wheel or diamond grinding wheel, the cutting edge of the tool has different degree of micro notch (that is, micro chipping edge and saw edge). In the process of cutting, the micro-notch on the cutting edge is easy to expand, which speeds up the tool wear and damage.

Modern high speed cutting and automatic machine tools have put forward higher requirements on tool performance and stability, especially coating cutting tool must be passivated before coating, in order to ensure the fastness and service life of coating.

3: the purpose of tool passivation

Edge passivation technology, its purpose is to solve the micro-gap of the cutting tool after grinding, so that the edge value is reduced or eliminated, to achieve smooth, sharp, strong and durable purpose. The main effects of tool passivation are:

Round edge: remove edge burr to achieve accurate and consistent round processing.

Cutting edge burr leads to tool wear, and the surface of the workpiece will become rough. After passivation, the cutting edge becomes very smooth, which greatly reduces the tool breakage and improves the surface finish of the workpiece.

Polishing tool grooves uniformly to improve surface quality and cutting performance.

The smoother the groove surface, the better the chip removal, allowing for higher cutting speeds. At the same time, the improvement of surface quality also reduces the risk of cutting tools and processing materials. And can reduce 40% of the cutting force, cutting more smoothly.