1. Selection of the shape of the internal grinding wheel for CNC grinders.
The shapes of the internal grinding wheels commonly used in CNC grinders are cylindrical and cup-shaped. The cylindrical grinding wheel is mainly used to grind through holes, while the cup-shaped grinding wheel is mainly used to grind the inner hole and the end face of the step hole.
2. Selection of internal grinding wheel diameter for CNC grinders.
In order to achieve the ideal grinding speed during the grinding process, it is generally best to use an internal grinding wheel that is close to the aperture. However, 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, there is generally an appropriate ratio between the grinding wheel diameter and the aperture of the workpiece being ground, usually between 0.5-0.9.
3. Selection of internal grinding wheel width.
CNC grinding machines use wider internal grinding wheels, which is beneficial to reduce the surface roughness value of the workpiece and improve production efficiency, and can reduce the wear of the grinding wheel. However, the grinding wheel cannot be too wide, which will increase the grinding force and cause bending deformation of the grinding wheel connecting the long axis. The grinding wheel width can be selected according to the workpiece length within the rigidity of the grinding wheel connecting the long axis and the allowable range of the machine tool power.
4. Selection of abrasive, particle size, hardness and bonding agent for internal grinding wheel of CNC grinder.
The selection of abrasive, particle size, hardness and bonding agent for the characteristics of CNC internal grinding wheel can be selected according to the material and processing accuracy of the workpiece. Generally, the grinding wheel used in CNC internal grinding machine should be 1-2 looser than the cylindrical grinding wheel.
