The technology of Machining wind power bearing used CBN Cutting Tools

Bearing, as one of the most important part in machine machinist ,is the core components of the wind power machinery. Bearing is the weak part in the wind power machinery. Because of its harsh environment of wind power bearing ,installation and maintenance is not convenient ,so it will required more strictly on the quality of the wind power bearing materials and the processing lifetime. So in order to get better performance ,we make unremitting efforts,  select more suitable wind power materials, materials quality control and the processing technology of propose measures. Thus it not only has enough strength and load capacity, but also has a good service life, safe ,reliable, smooth running and lubrication, corrosion and good sealing performance.

At the beginning, the wind power bearing will make heat treatment after roughing, the hardness is too high to difficult to process, we often use grinding process as the final process. But with the continuous development of modern cutting tools industry, we developed new cutting tools which can be used turning Instead of grinding, it not only improve the processing efficiency, but also reduce the processing costs. In current times, the wind power bearing processing technology will be as follows:

Bearing raw materials-Roughing-Heat treatment-Finishing-Inspection-Antirust-Storage (or assembly of finished products). 

Following we will analysis  the wind power bearing processing technology.

Raw Materials of Bearing Steel ,Forging : Wind power bearing usually use 42CrMo4 as the main materials of the wind power, and it will be forming with forged technology, we should control the forging temperature, so that the particle will not too big .

Rough Machining: Machining the wind power bearing which made through forged process, because the large working allowance, we need to choose the most suitable cutting tools materials. We can choose carbide insert . If the work piece hardness is above HRC45,we can choose CBN Cutting tools ,especially Halnn BN-S20 CBN insert ,the cutting depth can arrive 7.5mm,Then leave some processing allowance for the finishing process.

Heat-treatment(Quenching and Tempering):It need heat treating on the wind power bearing after roughing process, we need improve the hardness of the work piece, wear resistance and impact resistance ,and obtain the good usage lifetime.  Quenching is to improve the hardness of the work piece, wear resistance and impact resistance. Tempering is to eliminate the stress produced when the steel pieces in the quenching process to improve the high hardness of the steel work piece and wear resistance, and the required plasticity and toughness.

When the wind power bearing wall thickness is not more than 12mm, the hardness after quenching will be above HRC63 (Rockwell hardness), hardness after tempering will between HRC 60-65. The hardness of work piece after tempering will be different according to customer requirements. The hardness value depending on the tempering hardness with normal quenching process.

Finishing Process: We make finishing process on the work piece which after heat treatment to obtain the dimension and the procession which the drawing required. At the beginning ,we use grinding process ,grinding can get high precision ,but the working efficiency are low ,and some bearing required not higher on the precision. With the development of modern technology, the requirements for the accuracy of Ra 0.8 ,the cbn cutting tools can meet the requirements.

At present, The cutting tools in the market include carbide insert ,ceramic insert and cubic boron nitride cutting tools. The hardness of the work piece usually is above HRC45 because it is through the lasering process after heat treatment . So we will not recommend that using carbide cutting tools ,ceramic insert can use finishing process, but it can not use interrupted turning process ,and it will easily chipping when meet the Inhomogeneous dimension surface . Wind power bearing belongs to large scale forged work piece, it will be easily change after heat treatment, so we will not recommend that using ceramic insert .Cubic Boron Nitride is the best materials for machining hardened steel .Especially Halnn superhard researched non-metal adhesive BN-S20 and BN-S200 CBN Cutting Tools (following figures),The machining effect are very good for machining wind power bearings.    

Halnn ,as the most famous cbn cutting tools brand in China ,specific to offer the best solutions for the customers. Halnn always devoted to researching new cbn cutting tools materials to satisfy the customers requirements and offer the customers best cbn cutting tools with high quality  and excellent performance. Since established, Accurate grasp of the pulse of the times change, with long-term training accumulated technical strength and the most cutting-edge technology development capabilities, Halnn enjoyed a high reputation on superhard cutting tools in the academic community.

Halnn superhard non-metal adhesive BN-S20 and BN-S200 CBN Cutting Tools belongs to solid CBN insert .BN-S200 mainly used for finishing process ,the cutting depth can be controlled within 0.5mm. But BN-S20 Cutting Tools can be used for both roughing and finishing process, for the wind power bearing which working allowance usually above 2mm.

Inspection: Make final Inspect on the wind power bearing ,testing the size and accuracy of the wind power bearing standards.

Antirust: Wind power bearing surface coated with a layer of rust-proof oil to prevent wind power bearing rust

Storage (or assembly of finished products): Put the wind power bearing in the storage, or directly into the wind power bearing assembly, assembled into finished products.

With the continuous development of modern technology, more and more difficult materials to process, along with the tool industry is also constantly developing new products, only continue to advance with the times, developed a high-efficiency low-cost tool materials or tool grades. If you are interested in blades for machining wind power bearings or blades for machining hardened steel, click on the hard steel working area.

More information on cbn cutting tools, please feel free to contact with us halnntools@gmail.com ,skype :cbn_inserts_angels ,whatsapp :+8618695866134, wechat :Halnntools