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Sets up and opeartes variety of grinding machines, such as
external, internal, and surface grinders, to grind metal
workpieces, such as machine parts, dies, or tools, according to
knowledge of grinding procedures: Studies blueprint or layout on
workpiece to visualize grinding to be done, and plans sequence
of operations.
Selects grinding wheel, applying knowledge of
abrasives and metal properties, and secures it on spindle, using
wrench. Dresses wheel with dressing device. Lifts workpiece
manually or with hoist, and poistions and secures workpiece to
holding device, using wrenches and clamps.
Selects feed rates,
grinding speeds, depth of cuts, and grinding wheel of size,
shape, and grade for each operation, appyling knowledge of metal
properties, abrasives, product specifications, and shop
mathematics. Positions and tightens sotps to limit travel of
workpieces or grinding wheel. Moves controls to position wheel
and workpiece in relation to each other, and to set feed, speed,
and detph of cut. Starts machine, turns handwheel to feed
grinding wheel to workpiece or vice versa, and engages power
feeding device.
Turns valve hnadle and directs flow of coolant
against wheel and workpiece. Observes operation and adjutss
position and action of wheel and workpiece. Verifies dimensions
of ground workpieecs for conformance to specifications, using
measuring instruments, such as templates, micrometers, dial
indicators, and gauge blocks. Works to tolerances of plus or
minus 0.0001 inch.
May measure, mark, and scribe workpiece to
lay it out for grinding [Lay-Out Worker (machine shop)
600.281-018]. May dress grinding wheels to compelx profiles,
using special fixtures and tools. May grind nonmetallic
materials, such as plastics.
May operate tracer attachment to
duplicate contours from templates or moedls. May be required to
have specialized experience with particular materials, product,
or precision level or with machine of particular size, type, or
trade name.
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