What is diamond super hard abrasive grinding in diamond tool industry?

- Mar 22, 2019-

Diamond superhard abrasive grinding is the application of a medium (superhard abrasive and related paste, or liquid carrier) between the surface of the part and the grinding disc.

When diamond particles are embedded in the grinding disc, they are equivalent to superfine grinding, and during the grinding process, some particles may constantly detour from the grinding disc and become free particles rolling between them, so that the surface of the grinding part has no directional texture. The grinding process involves diamond particles cutting into the working surface to remove fine material. Imagine millions of repetitions of this kneading and rubbing process on the surface of a part, not only effectively removing the material, but also achieving the polishing effect (especially when the diamond abrasive particle size is up to 50nm).

In order to obtain the inherent strength advantage of diamond abrasives, ideal grinding machines need to have high downward pressure or thrust (5psi or higher), as well as a powerful drive system that allows for large pressure loads, variable speed, and the ability to rotate at high speeds.

Compared with traditional alumina abrasive, diamond super hard abrasive has the following advantages:

◎ high removal rate, achieve higher production efficiency

◎ half wavelength (11 parts per million), perfect edge-edge flatness, up to 1/20 wavelength in some cases

◎ The surface roughness is better than sub-micron (<0.5Ra), and in some cases, sub-nanometer

◎ one-step grinding and polishing scheme can be achieved to shorten the processing time

◎ Reduce waste in support of environmental protection

For grinding, the most important key to success is consistency. Many successful companies strive to control the surface contact rate, load, disc speed, abrasive filling process, abrasive paste spray drying. Control these variables to achieve more consistent parts roughness, removal rate, flatness or required profile, part size and thickness, flatness requirements, and finally customer satisfaction.