Everyone should know that the faster the better the CNC tools used on machining centers, however, what you may not know is that the tools still need to be passivated before they are shipped to the customer! So, what is passivation treatment? Why passivation treatment?
Passivation on CNC tools is quite different from the literal meaning of the word. First of all, passivation is a way to increase tool life; it improves the quality of the tool through a series of processes such as polishing, flattening and deburring. This is a normal process after the tool has been sharpened and before it is coated.
The tools are sharpened by grinding wheels before they are completely finished, but these sharpening operations cause micro-chipping of the tools to varying degrees. These microscopically notched tools are easily exaggerated when cutting at high speeds, resulting in faster wear and damage to the tool. Therefore, modern cutting technology has new and strict requirements for tool stability and precision, which leads to the passivation of the cutting edge is a necessary process before the coating treatment of CNC tools, because only in this way can we guarantee the firmness and service life of the coating.
So, what are the benefits of passivating the bluntness of cutting tools?
1. good resistance to physical wear of tools
During the cutting process, the surface of the tool is gradually worn out by use, and the cutting edge undergoes plastic deformation due to the high temperatures and pressures generated by the cutting process. Passivation of the tool prevents premature loss of cutting performance and improves the rigidity of the tool.
2. Maintaining the finish of the workpiece
As we all know, the presence of burrs on the cutting edge of a tool not only wears out the tool, but also causes the surface of the workpiece to become rough. After passivation of the tool, the cutting edge of the tool will become relatively smooth, and the chipping phenomenon will be greatly reduced, and at the same time, the surface finish of the workpiece can be greatly improved.
3. Convenient groove chip removal
Polishing the grooves of the tool greatly improves chip evacuation and surface quality. The flatter and smoother the surface of the grooves, the better the chip evacuation, and the more continuous the cutting process can be realized.
After passivation and polishing of CNC tools, the surface of the tool will leave many small holes, which can adsorb the cutting fluid during machining, so that the heat generated during cutting is greatly reduced, which can greatly increase the speed of cutting!
