Grinding wheel for restoration of cutting properties

The quality grinding of the cutting tools is directly influenced by the grinding wheel, which helps to restore the properties lost during operation. In this case, it is necessary to take into account several characteristics, such as graininess of abrasive material, shape, hardness and so on. The size is primarily determined by the design of the grinding machine. Experts advise to use products with the largest diameter, because this will largely depend on the performance and quality of the subsequent work, but there are exceptions.

For working with tool steels, in most cases a grinding wheel is used of white electrocorundum, which has an intensive self-sharpening of the cutting grains. Due to this, high enough productivity and good quality of polished surfaces is achieved. However, diamond or silicon carbide is used to grind cutting tools made of minor ceramics or carbide.

Currently, diamond grinding wheels are the hardest, in contrast to products made on the basis of other abrasive materials, but they also have their weakness, expressed in significant brittleness. In this regard, they are intended primarily for the final processing of tools from hard alloys, when you need to remove a not very large layer of material. That is, there should not be a strong shock load on diamond grains.

Such a grinding wheel can be made on a metallic, ceramic or organic bond. In the first case, high strength characteristics are provided, and also heat resistance increases. Thus, the service life is greatly improved and the geometric shape is perfectly maintained. Products on organic bonds are ideal for finishing. Unlike the above-mentioned analogs, they have a higher consumption of abrasive material.

The productivity of grinding work and the cleanliness of the treated surface also depend on the grain size of the abrasive. Depending on this parameter, micropowders, grinders and grinders are isolated. The tests carried out showed that the grinding wheel having a grain size from 60 to 80 is the best when grinding carbide surfaces. At relatively low cost, such products allow to remove a significant layer of hard alloy while ensuring sufficient surface cleanliness.

As a rule, the marking of grinding wheels is carried out with the help of special labels, which necessarily contain information about the manufacturer, abrasive material, grain size, hardness and bond. All listed data are placed in one line in abbreviated form. As for instruments that are small in size, some parameters are not allowed. In addition to marking, the products may indicate the bulk weight and structure, batch number and other characteristics.