Classification of grinding machines
The main types of grinders include disc type grinders, rotary shaft grinders, and various specialized grinders.
Disc grinder
There are two types: single disc and double disc, with double disc grinding machines being the most common application. On a dual disc grinder (see Figure [Dual Disc Grinder]), multiple workpieces are simultaneously placed in a cage located between the upper and lower grinding discs, and the cage and workpiece move in parallel with the action plane through an eccentric or planetary mechanism. The lower grinding plate rotates, and the upper grinding plate parallel to it can not rotate or rotate in reverse with the lower grinding plate, and can move up and down to compress the workpiece (pressure adjustable). In addition, the upper grinding plate can also rotate an angle around the column with the rocker arm for easy loading and unloading of workpieces. The double disc grinding machine is mainly used for processing two parallel surfaces, a flat surface (requiring additional attachments to compress the workpiece), cylindrical surfaces, and spherical surfaces (using grinding discs with V-shaped grooves), etc. When processing the outer cylindrical surface, due to the need for both sliding and rolling of the workpiece, it is necessary to reasonably select the type and arrangement angle of the holder hole groove. A single disc grinder has only one lower grinding disc, which is used to grind the lower plane of workpieces. It can process workpieces with different shapes and sizes on the same disc, resulting in high grinding accuracy. Some grinders also come with a mechanism that can automatically calibrate the grinding disc during the grinding process.
Rotary grinder
The workpiece or grinding tool (adjustable grinding ring or grinding rod) is driven by a forward and reverse rotating spindle to rotate. The structure is relatively simple and is used for grinding inner and outer cylindrical surfaces.
Special grinding machine
Depending on the workpiece being ground, there are center hole grinding machines, steel ball grinding machines, and gear grinding machines. In addition, there is a centerless grinder that uses a principle similar to centerless grinding, used to grind cylindrical workpieces.
