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provides a wide range of precision grinding services to industry. Precision Grinding is a cutting operation in which abrasive
grit comes into contact with a work piece and removes a small chip or swarf.
Grinding is usually performed by abrasive wheels that consist of aluminum
oxide or silicon carbide particles, or superabrasive wheels that consist
of synthetic diamond, or cubic boron nitride (CBN) particles. The abrasive
particles are held together by a resinoid, vitrified or metal bonding material.
Grinding machines are equipped with grinding wheels and fixtures for holding,
positioning, rotating, or traversing the work piece. The grinding wheel
rotates on a motor-driven spindle at about 2,000 surface meters (or 6,500
ft) per minute. Grinding machines are usually classified according to the
shape of the work piece, the manner in which the work piece is held, and
Shown is a precision CNC Jig grinder
The four basic types of precision grinding machines are:
| Center-type grinders accommodate cylindrical work pieces
that have been drilled at the center of each end. This enables the work
piece to be held "between two centers" and rotated. Dura-Metal can accommodate
work pieces up to 60" long and 16" diameter.
Centerless grinders eliminate the need for drilling the center at each end of the work piece. Instead, a rest blade and a regulating wheel support the work piece. The regulating wheel controls the rotation of the work piece.
Internal grinders fabricate the inside diameters of components that need a precision bore. Internal grinder wheels are small and rotate at very high speeds (7,600 to 60,000 rpm). During grinding, the work piece rotates slowly in the circular direction opposite to the grinding wheel.
Surface grinders are used on flat surfaces. The work piece rests on a flat table and is held in place by magnetism or fixturing. After the grinding wheel is lowered onto the work piece, the table can either reciprocate or rotate to facilitate grinding of an entire surface.
Wide Range of Grinding Capabilities:
Dura-Metal Products Corporation stations more
than 90 grinding machines on its shop floor. How can we put this precision
equipment to work for you?
Copyright © 2001 Dura-Metal Products Corporation