Roll is an indispensable tool in steel rolling production. In addition to the material of roll itself, hardness is the most important technical index of roll. In fact, as a large consumption part of the rolling mill, whether it is wire bar roll, section roll, narrow strip roll or strip roll, wear, crack and even spalling will inevitably occur in the production process. these failure forms will not only reduce the service life of the roll, but also affect the production efficiency of the mill and the surface quality of the rolled materials, but because of the high price of the roll, it can not be scrapped directly once it fails. In the face of roll wear failure, most production enterprises use turning (cubic boron nitride cutting tools) or grinding to correct.

In the early roll repair, most production enterprises use cemented carbide tools and ceramic tools to repair the roll, but with the improvement of roll hardness, wear resistance, machining efficiency and machining precision, traditional cutting tools have been unable to meet the needs of roll repair.

1、Rolls for producing profile steel

2、Rolls for plate production

3、Rolls for production of wire rod

At present, some CBN inserts in the market can meet the needs of high-speed steel roll repair, but due to the different production enterprises of CBN inserts, the technological process of making CBN inserts is also different, resulting in slightly different performance of CBN inserts. Today, according to my own experience and turning cases, the author recommends several grades and choices of CBN inserts commonly used in strip roll turning, wire rod roll turning and repair, profile roll turning and repair.

1、CBN inserts and Arbor commonly used in turning Plate and Strip Roller

Commonly used model RNMN, matching tool model CRGNR/L

2、Cubic boron nitride blades and arbors commonly used for turning / repairing wire bar rolls

Remarks: other sizes, accept non-standard customization

Central CRDNN for RNMN Round inserts

Remarks: other sizes, accept non-standard customization

3、Turning profile Roller and repairing Common CBN inserts