Aug 16, 2021
In the process of cutting stone, the diamond circular saw blade will be worn and damaged by alternating loads such as centrifugal force, sawing force, and sawing heat. The wear and tear of the diamond circular saw blade is mainly caused by the force effect and the temperature effect.
The main manifestations of grinding damage of diamond circular saw blades are as follows: abrasive wear, local crushing, large-area crushing, falling off, and mechanical abrasion of the binder along the direction of sawing speed.
Abrasive wear: The diamond particles are constantly rubbed against the workpiece, the edges are passivated into a flat surface, the cutting performance is lost, and the friction is increased. The heat of sawing will cause a graphitized thin layer on the surface of the diamond particles, which will greatly reduce the hardness and aggravate the wear.
Local breakage: When the surface of diamond particles is subjected to alternating thermal stress and alternating cutting stress, fatigue cracks will appear and local breakage will reveal sharp new edges, which is an ideal wear pattern.
Large area crushing: diamond particles are subjected to impact load when cutting in and out, and the more prominent particles and grains are consumed prematurely.
Falling off: The alternating cutting force causes the diamond particles to be continuously shaken in the binder and loose. At the same time, the wear of the bond itself during sawing and the heat of sawing soften the bond. This reduces the holding force of the bond, and when the cutting force on the particles is greater than the holding force, the diamond particles will fall off. Either type of wear is closely related to the load and temperature to which the diamond particles are subjected. And both of them depend on the cutting process and cooling and lubrication conditions.
Nov 17, 2023
