The surface grinder is used in abrasivefabrication to create a symmetrical, smooth finish on very flat surfaces. It’s a popular used abrasive machining technique in which a rotating cutting wheel containing abrasive material cuts random chips from a workpiece, producing a rough finish of it smooth or flat. The work material may consist of all kinds of materials including metal, plastic, ceramics, wood, fiberglass and many others. It can also be used on softer materials such as ceramics, plastics, glass and many others.
In the abrasive grinding process, the work piece is held flat against a stationary spinning wheel. The working piece is moved by a continuous belt that is attached to the wheel, sliding along the belt over a number of discs. As the belt moves against the work surface, the workpiece is ground and the grinding wheel cuts away the work piece at the base. The working piece then is raised to a higher level and the grinding wheel continues to grind away at the top of the new work piece. This entire process of raising and lowering work pieces, grinding them and lifting them back to a ready position, rolling them over and grinding them again, is called grinding.
An abrasive surface grinder has numerous applications in the industrial and fabrication environments. Grinding wheels are commonly used in abrasive milling machines. They may also be used in abrasive mixing devices, in vibratory machines and even in power rollers. In addition, they are used in the mechanical parts market to fabricate hollow components, such as, die cast vehicle parts, outer shell of toys, auto windshields and much more.
Another type of abrasive surface grinder is the laser surface grinder. These machines use laser energy to rapidly roughen surfaces and remove burrs, impurities and carbon powder from a work piece. They are often used in abrasive grinding applications for removing metal shavings and powder from polished metal surfaces. Some types of this type of machine include pulsed wave grinders, which can work at speeds of up to 1000 rpm, and diamond wheel grinders. The laser surface grinder is particularly useful in abrasive applications where the work to be ground needs to be flat, smooth and free of obstacles.
A magnetic chuck is another type of surface grinder, which uses a magnetic force to grind away at materials. This is more of a continuous motion chuck type machine. The term magnetic comes from the fact that the material to be ground using this type of grinder must be magnetised. The magnets in the chuck push materials against the work surface and the chuck itself can also be magnetised. Because the work surface cannot move when the magnetic chuck is operating, it is very stable and suitable for use with a large range of materials.
A good example of a chuck type surface grinder is the zero turn grinder, which uses its fixed position to force a rotary action on the workpiece. It has an adjustable chuck angle and a sliding plate whose contacts are stationary, on which the workpiece is moved. The sliding plate allows the work to be rotated as required. Some of these workpieces may require the use of a mechanical device such as a hydraulic press or a rotating screw to force the work into a flat position.