敦煌Several control indexes to determine the quality of diamond powder

Artificial diamond powder is mainly used in the grinding and polishing process of workpiece finishing, the user often requires the lowest diamond concentration, the fastest cutting speed, to obtain a good surface finish and the geometry of the workpiece, as well as the smallest possible surface micro-damage, in order to achieve such use requirements, no high-quality powder is not possible. Therefore, the following four indicators must be strictly controlled:

(1) particle size and content;

(2) Size distribution range;

(3) particle shape; 

(4) The strength of diamond.

Among these four indexes, particle size distribution range and particle size and content are the most important. If the particle size distribution of the fine powder is coarse, the content of the coarse particles will inevitably increase, although it is conducive to improving the grinding and cutting efficiency, but the surface finish of the workpiece will be significantly reduced; On the contrary, the processing efficiency is low and the surface finish of the workpiece is good. Therefore, it is very important to strictly control the distribution range of fine powder size and the content of coarse particles.

Particle shape not only affects the surface finish of the workpiece, but also affects the durability of the powder. The experiment shows that it is advantageous to control the particle to be approximately equal area shape, block shape and have sharp cutting edge Angle.

The strength of the micro-powder particles depends on the internal quality of the diamond, but also directly affects the shape of the crushed particles, it has been proved that the diamond with high strength as the raw material is crushed to approximately equal area and polygonal block particles more, this particle shape than any other shape of the grinding efficiency is high, are durable.