Why should CNC milling cutters be passivated during processing?

Why should CNC milling cutters be passivated during processing?

The cutting edge of the tool after being sharpened by an ordinary grinding wheel or a diamond grinding wheel does have microscopic gaps (ie, micro chipping and sawing) of different degrees. During the cutting process, the microscopic notch of the tool edge is easy to expand, which accelerates the tool wear and damage. Modern high-speed machining and automated machine tools put forward higher requirements for tool performance and stability, especially for CVD-coated tools or inserts, almost without exception, the tool edge is passivated before coating. The needs of the layer process can ensure the firmness and service life of the coating.

The importance of passivation of CNC milling cutter is that the passivated tool can effectively improve the edge strength, improve the tool life and the stability of the cutting process. The main factors affecting tool cutting performance and tool life, in addition to tool material, tool geometric parameters, tool structure, cutting amount optimization, etc., have experienced through a large number of tool edge passivation practices: there is a good cutting edge type and cutting edge bluntness. The quality of the Cutting Tool is also the premise of whether the tool can be cut faster and more economically.