CBN grinding wheel in the stone 's role

Cubic boron nitride (CBN) grinding wheel is grinding carbide , glass,

ceramics , precious stones high hard and brittle material effects tools in

recent years, with high-speed ultra-precision grinding grinding technology

rapid development of grinding wheels made ​​more high demand, ceramic resin

bonded grinding wheel can no longer meet
Production needs, because of its combination of metal bonded grinding wheel ,

high strength, good formability , long life and other significant

characteristics of the production has been widely used by metal-bonded

diamond wheels are manufactured in different ways there are sintered ,

plating two types , in order to give full play to the role of super abrasive

abroad from the 20th century, the  Plastic impact modifier early 90s with a high temperature brazing

process to develop a new wheel, which wheel is still in the research and

development stage .
The cutting tool is a grinding wheel , which consists of many small and hard

abrasive particles and adhesive bonding agent made ​​of the porous body .

Directly responsible abrasive cutting work must be sharp and has high

hardness, heat resistance and a toughness. Commonly used abrasive alumina (

also known as corundum ) and silicon carbide two kinds . Alumina-based

abrasive , high hardness, good toughness, suitable for grinding steel

material . Silicon carbide abrasive hardness is higher and more sharp , good

thermal conductivity , but more brittle , suitable for grinding cast iron and

carbide grinding wheel in the grinder as a cutting tool with the workpiece

machining side
France . The method is characterized by:
( 1) Since the abrasive grinding wheel itself has a high hardness and heat

resistance , high hardness can be processed so grinding materials such as

hardened steel , carbide, etc. . ( 2 ) determine  Zinc stearate the characteristics of the

grinding wheel and grinding grinding system can make even a trace cutting ,

general ap = 0.001 ~ 0.005mm; grinding speed is high , generally up to v = 30

~ 50m / s; grinder stiffness ; using hydraulic transmission, so grinding can

be obtained economically with high precision (IT6 ~ IT5) and a small surface

roughness (Ra = 0.8 ~ 0.2μm). Grinding is one of the main methods parts

finishing . ( 3 ) As intense friction , leaving the grinding zone temperature

is high. This will cause the workpiece to produce stress and deformation of

the workpiece surface and even cause burns . Therefore, a lot of grinding

coolant must be injected to reduce the grinding temperature . Also from the

coolant and lubrication chip . ( 4 ) grinding large radial forces . This will

cause the machine - grinding wheel - workpiece system flexibility retreat ,

the actual depth of cut less than the nominal depth of cut . Therefore, the

grinding will be completed when the  Optical brightener  light is not to be infeed grinding to

remove the error . ( 5 ) After blunt abrasive , grinding force also increased

, resulting in grain crushing or off, re- exposing the sharp edge , this

feature is called " self-sharpening ." Self-sharpening of the grinding head

in a certain period of time to normal, but over a certain working time should

be performed after manual trimming , grinding force increases so as to cause

vibration , noise, and damage the workpiece surface quality.