M2 Custom Gear Shaving Cutter Conventional Coated Normal Module

M2 Material Normal Module Conventional Type Gear Shaving Cutter

Coated Tool Materials
Coating the tool is one of the important ways to improve the tool performance. The emergence of coated tools has made a major breakthrough in the cutting performance of tools. The coated tool is coated with one or more layers of refractory compound with good wear resistance on the tool body with good toughness, which combines the tool matrix with the hard coating, thereby greatly improving the performance of the tool. Coated tools can improve machining efficiency, improve machining accuracy, extend tool life and reduce machining costs.
About 80% of the cutting tools used in new CNC machine tools use coated tools. Coated tools will be the most important tool varieties in the field of CNC machining in the future.
(1) Types of coated tools
According to different coating methods, coated tools can be divided into chemical vapor deposition (CVD) coated tools and physical vapor deposition (PVD) coated tools. Coated cemented carbide tools generally use chemical vapor deposition, and the deposition temperature is around 1000 °C. Coated high-speed steel tools generally use physical vapor deposition, and the deposition temperature is around 500 °C;
According to the different substrate materials of coated tools, coated tools can be divided into carbide-coated tools, high-speed steel-coated tools, and coated tools on ceramics and superhard materials (diamond and cubic boron nitride).
According to the nature of the coating material, coated tools can be divided into two categories, namely "hard" coated tools and "soft" coated tools. The main goal of "hard" coated tools is high hardness and wear resistance. The main advantages are high hardness and good wear resistance, typically TiC and TiN coatings. The goal of "soft" coating tools is a low coefficient of friction, also known as self-lubricating tools, which have friction with the workpiece material. The coefficient is very low, only about 0.1, which can reduce bonding, reduce friction, and reduce cutting force and cutting temperature.
Nanoeoating tools have recently been developed. This coated tool can use different combinations of various coating materials (such as metal/metal, metal/ceramic, ceramic/ceramic, etc.) to meet different functional and performance requirements. Reasonably designed nano-coating can make the tool material have excellent anti-friction, anti-wear and self-lubricating properties, which is suitable for high-speed dry cutting.
(2) Characteristics of coated tools
① Good mechanical and cutting performance: The coated tool combines the excellent properties of the base material and the coating material, which not only maintains the good toughness and high strength of the base, but also has the high hardness, high wear resistance and low strength of the coating. friction coefficient. Therefore, the cutting speed of the coated tool can be more than 2 times higher than that of the uncoated tool, and a higher feed rate is allowed. The life of the coated tool is also improved.
② Strong versatility: Coated tools have a wide range of versatility, and the processing range is significantly expanded. One coated tool can be used instead of several non-coated 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 will no longer increase significantly. When the coating is too thick, it is easy to cause peeling; when the coating is too thin, the wear resistance is poor.
④ Regrindability: The regrindability of the coated blade is poor, the coating equipment is complex, the process requirements are high, and the coating time is long.
⑤ Coating material: Tools with different coating materials have different cutting performance. For example, when cutting at low speed, TiC coating is dominant; when cutting at high speed, TiN is more suitable.
(3) Application of coated tools
Coated tools have great potential in the field of CNC machining, and will be the most important tool variety in the field of CNC machining in the future. Coating technology has been applied to end mills, reamers, drills, compound hole machining tools, gear hobs, gear shapers, shaving cutters, forming broaches and various machine-clamped indexable inserts to meet the needs of high-speed cutting machining. The needs of materials such as steel and cast iron, heat-resistant alloys and non-ferrous metals.