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The milling cutter head is one of the commonly used accessories on the milling machine. It is also because of its high frequency of use that the milling cutter head can be easily worn. However, can we take certain measures to maintain and maintain the cutter head to extend the service life of the cutter head? The answer is yes. Proper maintenance and service methods can extend the life of the cutter head.

1, using a rotatable cutter head

The ratio of the cutter head diameter D to the fixed shaft diameter d is increased, so that the cutter teeth automatically rotate in the cutter seat during cutting, and the rotation direction of the cutter teeth automatically sharpens the cutter tip, thereby improving the service life of the cutter head.

2, using the thermal spray technology to process the cutter head

Thermal spraying uses a heat source to heat the sprayed material to a molten state and blow it by airflow to spray it at high speed onto the surface of the part to form a surface treatment technique for the sprayed layer. Thermal spray technology can be deposited on the metal substrate. Ceramic coating combines the characteristics of high temperature resistance, wear resistance and corrosion resistance of ceramics with the toughness, workability, electrical and thermal conductivity of metal materials to obtain the ideal composite coating products. An important development direction in the field of product development.

The thermal spraying process is used to spray a high hardness wear-resistant alloy on the head of the cutter head. The alloy layer has a good metallurgical bond with the cutter head body, and has the characteristics of high hardness, wear resistance and no brittle fracture, and its life is longer than the conventional one. The inlaid carbide cutting height is about 0.5-1.0 times, and the preparation process is simple.

3. Using the surfacing technology to process the cutter head

In the head of the conventional inlaid carbide head, the head of the cutter head is layered and welded according to the shape of the pick by the surfacing technique. The main alloying elements of the surfacing coating are W, CR, V, and the alloying element content is basically the same as that of the W-series high-speed steel, and the coating is in a molten state. Therefore, the coating structure is similar to that of cast high-speed steel, and its structure is composed of skeletal eutectic Leysite and austenite transformation products, ensuring high hardness and wear resistance of the coating. The coating hardness is 660,6 HV, although not as high as that of cemented carbide, but the impact resistance of the coating is better than that of cemented carbide.