Designing and manufacturing of rotary bucket teeth

The rotary bucket teeth are an important part of the rotary drilling rig and are mainly used for engineering operations such as digging soil. The design and manufacture of rotary bucket teeth involve many aspects, including material selection, structural design, rake angle adjustment, and improvement of wear resistance and strength.

- Material selection and manufacturing process: Rotary bucket teeth usually use high-strength alloy steel as the base material, and improve their wear resistance and strength through heat treatment and brazing processes. Some rotary bucket teeth use heat-treated high-strength alloy steel and high-quality ultra-coarse cemented carbide to ensure the high strength and long life of the product. In addition, advanced processes such as electroslag casting and powder spray welding are also used to improve the wear resistance and impact resistance of bucket teeth.

- Structural design and rake angle: The rake angle of rotary bucket teeth is a key parameter affecting drilling efficiency. The choice of rake angle varies according to the hardness of different formations. For example, in formations with lower hardness, the rake angle of bucket teeth should be selected from 45° to 65°; while in harder formations, the rake angle should be slightly smaller, selecting 25° to 45°. This design can effectively improve drilling efficiency and the service life of bucket teeth.

- Application scenarios and applicability: Rotary bucket teeth are widely used in municipal engineering, tunnel construction, coal mining and other fields. Different types of bucket teeth are suitable for different working conditions, such as soil layers, sandstone, hard rock tunnels, etc. For example, Bauer bucket teeth (such as BFZ70, BFZ80, etc.) are widely used in rotary drilling rigs to meet different construction needs.

- Performance optimization and innovation: In order to further improve the performance of rotary bucket teeth, researchers have proposed a variety of optimization measures. For example, by improving the bucket tooth structure design, optimizing the material composition (such as adding Cr, Ni, Mo and other elements) and adopting a combined bucket tooth design, the service life of the bucket teeth can be significantly extended. In addition, flame spraying and insert technology are also used to improve the wear resistance and impact resistance of bucket teeth.

The design and manufacture of rotary bucket teeth need to comprehensively consider multiple factors such as material selection, structural design, blade rake angle adjustment and manufacturing process to meet the needs of efficient operation under different working conditions.