Classification of coated tools for non-standard tools:
Non standard tools can be divided into chemical vapor deposition (CVD) coated tools and physical vapor deposition (PVD) coated tools according to different coating methods.
Non standard cutting tools can be divided into cemented carbide coated tools, high speed steel coated tools, and coated tools on ceramics and superhard materials according to the different matrix materials.
Non standard cutting tools can be divided into hard coating tools and soft coating tools according to the properties of materials.
There are also popular nano coated tools.
Advantages of coated tools:
Coated tools can improve machining efficiency, improve machining accuracy, prolong tool life and reduce processing costs.
Characteristics of coated tool materials:
1. Good mechanical and cutting performance: the cutting speed of coated tool is 2 times higher than that of uncoated tool, and higher feed rate is allowed. The life of coated tools is also improved.
2. Versatility: one coated tool can replace several uncoated tools.
3. Coating thickness: with the increase of coating thickness, the tool life will also increase, but when the coating thickness reaches saturation, the tool life does not increase significantly.
4. Regrinding property: poor regrinding performance of coated blade, complex coating equipment, high process requirements and long coating time.
5. Coating material: the cutting performance of tools with different coating materials is different.
Application of coated tool materials:
In the field of NC machining, coated tool will be an important tool variety in the future. The coating technology has been applied to end mills, reamers, drill bits, composite hole machining tools, gear hobs, gear shapers, shaving cutters, forming Broaches and all kinds of indexable inserts of machine clamps, which can meet the needs of high-speed machining of various steels, cast irons, heat-resistant alloys and nonferrous metals. The tool life also increases with the increase of coating thickness, but when the coating thickness reaches saturation, the tool life does not increase significantly. When the coating is too thick, it is easy to peel off; if the coating is too thin, the performance is poor.
