The selection details of CNC internal grinding wheels are more important

The grinding quality of CNC internal grinding machines also depends on the grinding wheel to a large extent. Grinding wheels play a key role in the grinding quality of CNC grinding machines. We often use electroplated grinding wheels, resin grinding wheels, ceramic grinding wheels, CBN grinding wheels, etc. So what kind of grinding wheel should we choose the most suitable for us?

1. Selection of grinding wheel shape of CNC grinder

There are two types of grinding wheels commonly used in CNC grinders: cylindrical and cup-shaped grinding wheels. The barrel type grinding wheel mainly grinds through holes, and the cup type grinding wheel mainly grinds the inner hole, and can also grind the end face of the stepped hole.

2. Selection of grinding wheel diameter of CNC grinder

In order to obtain the ideal grinding speed in the grinding process of the CNC grinder, it is generally best to choose a grinding wheel close to the hole diameter, but when the diameter of the grinding wheel increases, the contact arc between the grinding wheel and the workpiece also increases, resulting in increased grinding heat , Making chip removal and cooling more difficult. In order to achieve better results, generally there is an appropriate ratio between the diameter of the grinding wheel and the hole diameter of the workpiece to be ground, usually this ratio is between 0.5-0.9.

3. Selection of grinding wheel width

The CNC grinder adopts a wider grinding wheel, which is beneficial to reduce the surface roughness value of the workpiece and improve the production efficiency, and can reduce the wear of the grinding wheel. However, the grinding wheel cannot be selected too wide, which will increase the grinding force and cause the bending and deformation of the long axis of the grinding wheel. To be within the allowable range of the rigidity of the grinding wheel connected to the long shaft and the machine power, the width of the grinding wheel can be selected according to the length of the workpiece.

4. Selection of abrasive, particle size, hardness and bonding agent

The characteristic abrasive, particle size, hardness and bonding agent of the grinding wheel of CNC internal grinding machine can be selected according to the material and machining accuracy of the workpiece. Generally, the structure of the grinding wheel used by the CNC internal grinding machine should be looser than that of the external grinding wheel.