As the only domestic brand tool company in the CBN industry, Halnn Superhard has been committed to the complete tooling and design of high hardness cutting and high speed cutting. It is a company integrating scientific research, manufacturing and sales. We have always provided our customers with professional and efficient tools and tool solutions, and we have many tool brands that are trusted by our customers.
Halnn Super Hard not only has a high reputation in the field of high hardness, but also has professional and efficient tools for ordinary gray cast iron. Gray cast iron is widely used in automobiles, machine tools and other fields, mostly in mass production, and the requirements for gray cast iron are gradually improved.

Gray cast iron has just begun to be processed with cemented carbide tools. Since the hardness of gray cast iron is generally HB170-210, and it has been processed by ordinary lathe at the beginning, there is no requirement for the production efficiency of gray cast iron, as long as the drawings are guaranteed. However, with the mass production of gray cast iron and the increase of raw material cost, for gray cast iron processing plants, improving the processing efficiency and reducing the processing cost can ensure the overall interests of the company.

In order to improve the processing efficiency, mechanical manufacturers generally use CNC machine tools instead of ordinary machine tools to process gray cast iron, which not only improves the processing efficiency, but also ensures a good finish. However, important problems have arisen. The use of CNC machine tools for machining gray cast iron, carbide tools can not be cut at high speed, high-speed machining of gray cast iron carbide tools will produce severe wear, mainly in the high-speed cutting process will produce a lot of heat, hard The alloy tool can only withstand a high temperature of 500°. When the range of the carbide tool is reached, the tool will not wear. The frequent tool change will affect the overall machining efficiency, and the tool cost will remain high. There is no cost reduction for the company.

Halnn super hard for the performance of CNC cast iron processing gray cast iron and the problems encountered in the machining of CNC machine tools, through continuous research and practice, the development of high-speed cutting gray cast iron boron nitride tool BN-S300 grade and BN-K20 grade. Not only can high-speed cutting but also significantly reduce tool costs, and obtain good benefits for the company.

Among them, Halnn super hard CBN tool BN-S300 grade belongs to the whole polycrystalline CBN tool with coarse and fine processing. The line speed reaches 200-700m/min, the depth of the knife is 1-10mm, the feed rate 0.2-1 mm/r. Finished gray cast iron selection of Halnn super hard CBN tool BN-K20 grade, line speed of 300-1500m / min, the depth of the knife is less than 0.3mm, the feed rate is 0.05-0.3mm / r. The cutting parameters are adjusted according to the rigidity of the machine tool. The rigidity of the machine tool is high, the high feed rate is high, and the large knife is processed deep, and vice versa.

Such as Halnn super hard CBN tool BN-K20 grade finishing gray cast iron typical parts brake drum: processing steps: finishing brake surface and stop; tool grade: BN-K20 WNGZ080408; cutting parameters: ap = 0.3 mm, Fr = 0.25 mm/r, Vc = 350 m/min. Processing effect: Compared with other PCBN inserts: the finish of other factory PCBN inserts reaches Ra2.0, the finish of Halnn superhard CBN cutter BN-K20 grade reaches Ra1.0, and the single-blade life is the other PCBN inserts. 1.5-2 times.