The selection of tungsten steel stone sharp knives is based on matching tool parameters according to the stone material and processing requirements, taking into account sharpness and durability, and adapting to CNC engraving processing. Soft stones such as marble and sandstone are suitable for high cobalt ultrafine particle tungsten steel cutting tools. They have sufficient toughness and are not easy to tip, meeting the needs of fine processing such as shallow carving and engraving. Hard stones such as granite and quartz require the use of low cobalt, high hardness tungsten steel knives that are wear-resistant and impact resistant. Welding knives should be avoided as much as possible to prevent damage caused by detachment during high-temperature operations.

    The selection of cone angle is crucial. A 30 ° cone angle is a universal option that balances sharpness and resistance to collapse, making it suitable for most stone carvings. Choose a small cone angle of 20 ° to 25 ° for small and fine lines, and a large cone angle of 35 ° to 45 ° for deep carving and rough carving of hard stones. At the same time, it is necessary to match the handle diameter of the carving machine chuck and select the appropriate effective blade length according to the carving depth. Prioritize the use of tools with uniform cutting edges, no burrs, and high concentricity, which can effectively reduce cutting and edge breakage problems, greatly improve carving accuracy and tool service life.