The Grinding Process of Abrasive Belt
Abrasive belt is a kind of belt-shaped tool that can be ground and polished, which is made by bonding abrasives to flexible materials such as paper and cloth using adhesives. Its basic composition is : base material, abrasive and binder, collectively called the three elements of abrasive belt. Abrasives are mainly used for grinding and constitute the main body of abrasive tools. Diamond is selected as abrasive for diamond abrasive belt.
The biggest feature of diamond abrasive belts is high grinding efficiency, high durability, high finish, high gloss, and high cost performance. Diamond abrasive belts are divided into three categories according to use, tool performance, and manufacturing difficulty: resin dispensing type abrasive belts, Resin full-coated sanding belt, electroplating dispensing sanding belt, etc.
Resin dispensing products have evenly distributed gaps in the middle, so they have better grinding performance when grinding hard plastic materials or during dry grinding. Electroplated abrasive belt is a common type produced by domestic and foreign manufacturers, mainly due to the simple production equipment of electroplated abrasive belt, and the high bonding strength of electroplated abrasive belt, the wear resistance and temperature resistance of the adhesive are higher than that of resin, but the electroplated type is closed. Problems such as the strength of the base material of the sand belt and the joint strength of the base material need to be further studied and resolved.
Abrasive belt grinding is elastic grinding, the cutting force is relatively small, and the deformation of the workpiece is small. Compared with the grinding wheel grinder, the belt has a long circumference and good heat dissipation effect, so it is called cold grinding, so the processed deterioration layer is thin and does not It will affect the heat treatment effect. In addition, the abrasive belt can be replaced according to the particle size, and different roughnesses on the same machine tool must be reached until the degree of mirror surface. And it is more adaptable than general lathes, clamps, planers, and grinders, and can solve the grinding that cannot be solved by grinding wheel grinding. For example, the grinding of large areas (wood plates, steel plates) and complex profiles (such as engine blades) cannot be ground with fixed abrasive tools (grinding wheels, etc.), but can be achieved with abrasive belts.
Abrasive belt grinding process has higher grinding efficiency and productivity. Because many manufacturers use electrostatic sand planting to evenly distribute each grit of the abrasive grains on the substrate, so that the sharp-angled processing surface of the grit faces up against the processing surface, which greatly improves the grinding efficiency of the abrasive belt.
The life of diamond abrasive belt is much longer than that of silicon carbide abrasive belt. It is especially suitable for the processing of hard and brittle hard-to-machine materials or high-precision and ultra-high-precision products for special purposes, such as polishing and grinding of cemented carbide parts, gemstones, and ceramics. Soft grinding wheel special-shaped polishing and dental clinical applications.
The super-hard material abrasive belt has the dual characteristics of super-hard material "hard" and coated abrasive "soft", which is the best combination of "rigid" and "soft". Super-hard materials are much more expensive than ordinary abrasives, but in terms of high performance, long life, and high cost performance, the use of super hard materials is a tool with high efficiency, high efficiency and high cost performance.