Performance characteristics of the resin grinding wheel on the grinding wheel

(1) Abrasive material:

Cutting grinding wheel abrasive commonly have cut brown jade (A), corundum (wA), corundum (BA), silicon carbide (c), the most commonly used is corundum, corundum because of high hardness, toughness, particle Fengrui, applicability and the price is lower than other abrasive characteristics. Corundum smelting reduction in their adequacy and two points a sand sands, mainly in the chemical composition: Al2O3 content of a sand ≥94.5; Al2O3 content of two sand <94.5%; 85% in general left and right, and the Fe2O3 content of 4-5%; therefore two sand hardness lower than a sand, but the price is low; corundum applicable to all kinds of carbon steel and alloy steel processing in general; corundum higher hardness than corundum, brittle, grinding heat is small, because the price is high, the thermal deformation of the workpiece requires hours of use, there are mixed as abrasive materials for special processing; black corundum Al2O3 content of 70 ~ 85%, Fe203 content of 7 to 9% low hardness, poor cutting forces, but the price is cheap; black silicon carbide high hardness and brittleness good, sharp cutting edge, good self-sharpening performance, good thermal conductivity, there are advantages in processing non-ferrous metals, plastics, rubber and cast iron.

 

(2) abrasive particle size:

Common particle size: 22 # -80 #, fine granularity low cutting efficiency.

(3) Wheel hardness:

Common hardness: P, Q, R; N, S; wheel generally relatively rigid, in order to reduce wheel wear. The hardness of the binding agent how much molding density, firing temperature and firing time and other factors to control.

(4) binding agent:

Commonly used resin binders are: phenolic resin powder, liquid phenolic resin. Powdered phenolic resin technology is good, abrasive molding density slightly smaller number of larger organizations, the price is higher than the liquid phenolic resin; liquid phenolic resin low price, but the material is easy to mix and caking material is not easy to spread evenly, easy to cause localized abrasive hard.

(5) Organization:

Cutting grinding wheel should be slightly larger number of organizations, in order to improve cutting efficiency: too much will affect the strength and common organization No. 3 to No. 7.