The Advantages and Application of CBN Inserts Hard Turning

1. The Advantages and Application of CBN Inserts Hard Turning Modern technology has made it increasingly difficult to create large-scale bearings with high precision. The tolerance levels are now P4 and P5. Large bearings are usually manufactured using CNC Lathes as well as Grinding Tools. Because of the limitations of grinding efficiency and costs are not as high. With the research and use of superhard cutting instruments solid CBN insert manufacturers in a variety of cold-processes, turning processes can replace grinding. This article will share you the procedure of hard turning rings on bearings. The surface roughness will reach Ra0.4~ 0.8 and can meet the requirements for the bearing. The Characters of the CBN Inserts For Bearings with Hard Turning CBN Insert is among the most efficient materials used for machining ferrous metals. It has high hardness, wear resistance, and is second only in importance to diamond tools. CBN Insert is capable of cutting materials that have high hardness. CBN Insert is stable and has a high red hardness at high temperatures. If the temperature increases, the materials will soften. This can benefit the cutting process. CBN Insert is very antioxidant and will not react with iron at temperatures above 1200 - 1300? However, it is able to undergo hydrolysis at 1000?. Therefore, when we employ PCBN turning inserts machining bearings; we need utilize dry cutting techniques. CBN Insert is low in Co-efficient of friction and won't easily create the chipping layer. It can also improve the quality of the surface and finish of the work piece. CBN Materials Used For Bearings with Hard-Turning The allowance for the machining of large scale bearing is large and typically, we use a CBN inserts that are solid in order to minimize the cutting process and enhance the efficiency. And BN-S20 CBN Solid Insert is among the most commonly used CBN materials. BN-S20 is a part of PCBN turning inserts; the hardness is HRC951000 and uses ceramic as binder that will ensure outstanding wear resistance as well as the high chemical resistance at high temperatures. For instance Machining wind power bearings of diameter 1900mm, thickness 130mm when using a grinding procedure, the grinding time is about more than 18h; if use turning instead of grinding the time is only 4.5h. The roughness may reach Ra0.3um. Turning can have the ability to process at least four times higher than grinding. Costs are just 20% The Benefits Of Inserts Made From CBN Hard Turning Bearings

2. (1) Efficiency increased several times (2) It can be used for bulk orders and is long-lasting. (3) Reducing the pollution In comparison to grinding processes, the chips are easily recycled. And turning process doesn’t need cutting fluid. Conclusion CBN cutting tools with CNC Lathe are able to turn bearings by hard turning. This improves the working efficiency and reduces cost of the tool. With the growth of the cutting tools industry many bearings makers utilize CBN inserts in lieu of grinding process.