CBN grinding wheel selection and practical examples

1 Introduction

Grinding is one of the oldest processing methods of mankind. With the development of industry, especially the processing of hard metal, it is an indispensable processing method. In the 1980s, the development of CN machine tools and machine tool machining centers in the developed western countries was developing at a high speed. The application of high-speed spindles and hard tools, the machining of the grinding machine seemed to be expensive. However, with the development of grinding technology, the grinding tools have been further improved. Abrasives are fundamentally improved in productivity by innovating the quality of the abrasives available, improving the structure and using a new binder system. The ultra-hard material CBN was invented as an abrasive for the manufacture of grinding wheels, which not only efficiently processed hard steel (HRc 45-65), but also doubled the durability of the grinding wheel. In particular, the CBN grinding wheel of ceramic bond developed in the mid-eighties of the last century, represented by Krebs & Riedel of Germany (珂萡石·德德乐), especially the technical breakthrough in the correction of sharpening, It can be said that it is a revolution in grinding molds. The successful development of CBN grinding wheels for ceramic bonding agents has in turn proposed technical parameters for manufacturers of grinding machines to produce grinding machines that are suitable for the nature of CBN grinding wheels. The CNC multi-axis grinding machine jointly developed by the grinding machine manufacturer and the grinding wheel manufacturer greatly improves the processing efficiency and reduces the production cost, and makes the ancient processing technology have a new brilliance.

2 Classification of CBN grinding wheels

Grinding wheels made of CBN abrasives can be divided into the following four types according to different processing techniques and combinations of different components used. Their nature and use (referred to as machining applications) are also different.

(1) Electroplated CBN/diamond grinding wheel

The grinding wheel has a simple production process and low production cost. The molding is simple but there is only one layer of plating, which cannot be corrected. It is difficult to know when the grinding layer is damaged during the processing. Suitable for small batch machining and geometry complex forming grinding and as a correction Roller.

(2) Sintered CBN/diamond grinding wheel

High hardness and high density, it is processed into a high-precision correction roller, which is costly. Mainly used for the grinding wheel of the grinding wheel and the processing of large quantities of superhard materials.

(3) Resin CBN/Diamond Wheel

The grinding wheel has a simple production process and low production cost. Forming is simple but it is not easy to correct the shape. Used in the processing of multi-type small batches. Such as tool grinding and tool processing, and glass processing.

(4) Ceramic bond CBN/diamond grinding wheel

The processing technology and the formulation of the bonding agent are mastered by a few foreign manufacturers, such as Krebs & Riedel of Germany, which has just entered the Chinese market, WINTER of the world's largest abrasive mold group Saint-Gobain, TYROLIT of Austria, Wendt of Germany and WINTERTHUR of Switzerland. . The CBN/diamond grinding wheel of the domestic ceramic bond has also made a breakthrough recently. The ceramic bond CBN/diamond grinding wheel has the advantages of strong grinding force, high-speed machining without burning the workpiece, and can be corrected and durable. It is the most ideal high-speed, high-efficiency and high-precision grinding tool. Use the following examples of work as an example to discuss the application of the grinding wheel with your colleagues.

3 application examples

It can be seen that for consumable products, it is necessary to use cost performance and not just look at the price. As a large-volume, stable quality production, the non-negligible parameters - time: the efficiency and the reduction of the scrap rate, the economic benefits. This shows that the cost of grinding production is low.

4 conclusion

In developed industrial countries, for high-volume, high-precision grinding, the hardness of the workpiece is HRc greater than 45, which is basically ground with ceramic CBN grinding wheels. It is widely used in major parts of automobiles such as camshafts, crankshafts, gearboxes and gears of gearboxes, bearings and Brake pads. Grinding of precision machined parts such as guide rails, lead screws and motor shafts used in machine tools. The grinding machine parts are ground to an accuracy of 0, 3-0, 5 microns. CBN ceramic grinding wheels are used for the grinding of rolling mill wheels and their applications in aviation, aerospace and military industries. If you want to explore the application of this aspect, please email: lei.

Due to the long production cycle of CBN ceramic grinding wheels, users must have a plan to order. A good manufacturer formulates the grinding wheel according to the user's production process and the technical parameters of the workpiece. The choice of abrasive, the size of the abrasive particles, the tightness of the structure, the hardness and shape of the grinding wheel. The parameters of the grinding wheel are not only based on the technical parameters of the workpiece but also the technical parameters of the grinding machine. Therefore, it is a technology for the buyer and the seller to apply the CBN process. The technology with higher content must be purchased through professional channels to purchase suitable grinding wheels to improve production efficiency and reduce production costs.