Surface grinding involves a vertical or horizontal axis grinding machine attached to a square or circular table. The surface grinder wheel, which can be either straight-type
or cup-type, revolves around the spindle during operation. The workpiece is positioned on the rotary or reciprocating table, close to the surface grinding machine, allowing for accurate material removal. This method is commonly used to achieve a smooth surface finish and maintain tight dimensional tolerances in various
applications.
In the centerless grinding process, the workpiece is supported on a work-rest blade
and guided by a regulating wheel, which acts as a secondary wheel. As the grinding
wheel rotates, the workpiece is pressed down onto the work-rest edge and against
the regulating wheel. The regulating wheel, rotating in the same direction as the
grinding wheel, controls the longitudinal feed of the workpiece at a slight angle. The
angle degree and wheel speed determine the feed rate, eliminating the need for
center holes or securing devices. This process is efficient for producing parts in large
quantities, particularly in the automotive sector in the Middle East.
Cylindrical grinding involves grinding the exterior surface of a cylinder, which can be
straight, contoured, or tapered. The fast-rotating grinding wheel and the revolving
workpiece make contact, with the wheel rotating in the opposite direction to the
workpiece. This contact removes material from the workpiece, making cylindrical
grinding suitable for hardened workpieces or when high precision and a fine finish are needed. This process is commonly used in producing shafts, rollers, and other
cylindrical components.
Internal grinding is the process of finishing straight, tapered, or formed holes with precision. A work-holding device, such as a collet or chuck, secures the workpiece, which rotates with the help of a motorized headstock. Another motor drives the grinding wheel in the same direction. Both the depth of the cut and the workpiece’s movement (inwards and outwards) are adjustable, providing control over the finished
product. Internal grinding is particularly important in manufacturing components like
bearings and bushings that require tight internal tolerances.
Tool and cutter grinders are used to sharpen machining tool cutters, such as milling cutters, taps, and reamers. Various special tool attachments are available to sharpen these cutting tools effectively. The general-purpose cutter grinder is versatile and is
often used in tool rooms and maintenance shops where the upkeep of cutting tools is necessary for efficient machining operations.