To increase the service life of the abrasive belt, the following measures can be taken:
1. Reduce the initial wear of the abrasive belt.
The initial wear of the belt is caused by the shedding or breakage of abrasive particles. In order to reduce the initial wear, the new belt is pre-ground for a certain period of time by reducing the contact pressure, and then it can be used for normal operation. This method can also be called dressing, but it is different from the dressing of the grinding wheel.
2. Use grinding aids or grinding fluids to reduce the abrasive wear rate in the stable wear stage.
The main purpose of using grinding aids or grinding fluids is to reduce the source of wear - the friction between the abrasive particles and the workpiece, reduce grinding heat, and thus achieve the effect of reducing the wear rate.
3. Increasing the circumference of the abrasive belt can reduce the action rate of the belt.
Reducing the action rate of the belt can increase the life of the belt. If the machine tool equipment conditions allow, appropriately increase the circumference of the belt so that the belt can be better cooled and the total number of abrasive particles involved in grinding can be increased.
4. Properly increase the sanding belt speed.
Properly increasing the sanding belt speed can not only reduce the surface roughness, but also reduce the breakage and wear of the abrasive particles and extend the service life.
5. Gradually increase the grinding pressure.
After the abrasive belt enters the normal cutting stage, gradually increasing the grinding pressure of the belt can strengthen the grinding process, increase the abrasive cutting edge ratio, crush the abrasive grains, generate new cutting edges to restore cutting ability, that is, self-sharpening, thereby achieving the purpose of extending the service life of the belt.
6. Improve the cutting performance of the abrasive belt.
Abrasive grains with good toughness are more resistant to crushing, thus extending the service life. The cutting performance of the belt with classic sanding is better than that of the gravity sanding. Reducing the thickness of the binder and the density of the sanding can increase the chip space of the belt, increase the strength of the binder, and make the bonding more reliable. These measures can improve the grinding performance of the belt to a certain extent and extend the service life of the abrasive belt.
The above measures are mainly aimed at reducing the main form of wear, which is abrasion and breakage of the sanding belt. As for the two forms of sticking and detachment, they can be solved by controlling and selecting the sanding belt structural parameters such as the sanding belt's tissue hardness and sand planting density. At the same time, the sanding belt surface can be coated with a special coating, that is, the super coating mentioned above, to solve the problem of sticking and wearing of the sanding belt or use grinding fluid.
