Talking about the knowledge of the grinding wheel blade of the carbide saw blade grinding machine

 

1. Grinding wheel hardness

 

The hardness of the grinding wheel is also an important factor for grinding teeth.The grinding wheel needs to have a uniform hardness. If the hardness is not uniform, the tooth shape of the grinding will affect the sawing effect of the saw blade, and the consumption rate of the grinding wheel will also increase. .

 

2. Selection of wheel thickness

 

The thickness of the grinding wheel is selected according to the tooth shape and pitch to be ground. The thickness of the grinding wheel used for the arc-shaped teeth is about 1/2 of the grinding tooth pitch, the shape of the grinding wheel is semi-circular, and the thickness of the grinding wheel used for the triangular teeth is about the desired Grinding tooth pitch is 1/3, its shape side is acute angle.

 

3. Inner hole of grinding wheel

 

If the inner hole of the grinding wheel is not standard (such as out of round), it will affect the safety of operation.If the inner hole of the grinding wheel exceeds the tolerance range, it will cause the vibration of the gear grinder head, and even the grinding wheel will break; if the inner hole is small, it will not be installed. , Affecting normal use.

 

The characteristics of cemented carbide saw blade grinding machine:

 

1. High hardness, wear resistance and red hardness

 

The hardness of cemented carbide can reach 86～93HRA at room temperature, which is equivalent to 69～81hrc. It can maintain high hardness at 900～1000℃ and has excellent wear resistance. Compared with high-speed tool steel, the cutting speed can be 4 to 7 times higher, the life span is 5 to 80 times longer, and hard materials with a hardness of up to 50HRC can be cut.

 

2. High strength and elastic modulus

 

The compressive strength of cemented carbide is up to 6000MPa, and the elastic modulus is (4-7)×105MPa, which is higher than that of high-speed steel. But its flexural strength is low, generally 1000～3000MPa.

 

3. Good corrosion resistance and oxidation resistance

 

Generally, it can resist atmospheric, acid, alkali and other corrosion, and is not easy to oxidize.

 

4. Small linear expansion coefficient

 

When working, the shape and size are stable.

 

5. Formed products are no longer processed and reground

 

Due to the high hardness and brittleness of the cemented carbide, the powder metallurgy is not sintered or re-grinded after sintering. When special processing is required, only electrical machining such as EDM, wire cutting, electrolytic grinding or special grinding wheel grinding can be used. cut. Products of certain specifications usually made of cemented carbide are used by brazing, bonding or mechanical clamping on the knife body or the mold body.