The Application of Processing Rolls Groove: Halnn CBN Insert

    Rolls groove design are an important part of rolling production, which has a great impact on finished product quality, rolling mill productivity, equipment safety, production cost and so on. Therefore, the groove quality requirements are also very high in the machining process.
   In the process of grooving, the grooving of high-speed steel rolls is difficult to process. The main reason is that the hardness of high-speed steel rolls is too high. The hardness of high-speed steel rolls are close to that of common cemented carbide cutters. So choosing suitable high-hardness cutters can promise the normal processing of high-speed steel roll grooves.
    At present, some inserts can realize the rolls groove such as PCD,CBN and Ceramic inserts and so on, which its has different work Scope. Diamond cutting inserts are mainly used for processing non-ferrous and non-metallic materials, while ceramic cutting inserts and CBN cutting inserts are mainly used for processing ferrous metal materials, but ceramic cutting inserts are too brittle to be recommended. Therefore, CBN inserts are recommended for  high-speed steel rolls groove.
    Halnn superhard PCBN inserts BN-S20 can directly groove the high speed steel. BN-S20 CBN inserts have excellent high temperature resistance and impact toughness. It can cut with large margin and high efficiency. Rough and finish machining can complete the machining process with one knife.

At the same time, BN-S20 can repair and process the high-speed steel rolls and no collapse in the interrupt-cutting.
 
Application                                                         

 (1)high speed steel rolls turning groove: Halnn solid PCBN inserts can make the life improve twice rather than some brand CBN life.  

	Material：High-speed steel Rolls, Hardness HSD90 Selected Insert：BN-S20 RCMX120700 Cutting Condition：Fr=0.2mm/r，Vc=35m/min Methods：Dry cutting
Insert material	Tool Life/Tip	Failure mode
Halnn BN-S20	25 grooves	Normal wear
Some brand CBN	12 grooves	Damage rupture

(2) Repair Rolls and renew turning groove: The efficiency of Halnn solid PCBN inserts are 5 times higher than that of traditional tools.