What is bond? & The role of bond

Bond is the material of bonding abrasive grains to make different kinds of grinding wheels. The type and property of bond decides the intensity. hardness. heat resistance and corrosion resistance of grinding wheels ,etc. Morever , bond also has certain influence on grinding surface roughness and grinding temperature, bond is mainly based on its’ own properties. Grinding wheels have many types of bonds. The following are the common grinding wheel bond types:

                   1. Vitrified; 

                   2. Resin; 

                   3. Metal; 

                   4. Electro-plated.

The following is the detailed information about grinding wheel bond type and bond code, features of bond and advantages of abrasive tools.

 

Bond Type&Bond Code	Features of Bond	Advantages of Abrasive Tools
Resin (B)	Good elasticity/ Have the role of polishing.	Good self-sharpness / Not easy to block
		The surface roughness grinded is lower.
	Weaker intensity to bond abrasive grains/ Poor heat resistance	Higher grinding efficiency/ Low grinding  temperature
Vitrified (V)	The intensity to bond the abrasive grains is superior to the resin.	The wear resistance of the abrasive tools is superior to the resin.
		Sharp Cutting/ Higher grinding efficiency
		Not easy to heat and block when grinding.
	Better heat resistance	Small amount of thermal expansion
		Easy to control the processing precision and to be dressed.
Metal (M)	The intensity to bond the abrasive grains is higher.	Abrasive tools have higher bonding intensity.
		Longer using life/ Good wear resistance
	Better rigidity	Can bear larger loads./ Shape remains good when grinding.
Electroplated	The intensity to bond the abrasive grains is higher.	The abrasive layer is very thin.
		The density of the abrasive grains is high.
		The surface of the grinding wheel cuts sharply.
		The efficiency of grinding is high.
		Economical
		Usually, there’s no need to be dressed.

Every coin has two sides. Abrasive tools using different types of bond not only have their advantages, but also have disadvantages.

Bond Type(Code)	Disadvantages of Abrasive Tools
Resin(B)	Worse wear resistance
Vitrified(V)	The abrasive layer of the grinding wheel is rough.
Metal(M)	Poor self-sharpness
	Easy to heat and block when grinding.
	Difficult to be dressed.
Electroplated	Shorter Using Life