- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who sets up and operates lapping machines to lap surfaces of flat, cylindrical, or spherical objects or of adjacent mechanical parts to specified finish or dimensions, following specifications, tooling instructions, and standard charts, applying knowledge of lapping procedures. Respnsibilities include:
* Reads blueprint or job order for product specifications, such as dimensions, tolerances, and number of parts to be lapped, tooling instructions, such as lapping speeds and pressures, work-holding fixtures, and laps to be used.
* Mounts laps on spindles with wrenches.
* Positions and secures workpieces in fixture or on machine table.
* Moves controls to set lapping speeds, tool pressure, and length of cycle and to guide action of laps against workpieces or workpieces against each other.
* Starts machine and brushes or sprays lapping compound on laps and workpieces.
* Inspects lapped workpiece for conformance to specifications, using instruments, such as comparator, flatness gauges, and surface plates.
* May be assisted by machine setter in setting up machine.
* May operate machine equipped with abrasive wheels instead of metal laps.
* May be required to have experience with custom or production work, with particular material or product, or with machine of particular type or trade name and be designated accordingly.
Industry:Professional careers
A professional who operates polishing lathe to reduce circumference of printing rollers to specifications and remove defects, such as turning and polishing lines, high spots, and scratches. Respnsibilities include:
* Mounts roller on mandrel of lathe, using hoist.
* Measures circumference of roller at several points to locate irregular spots, using girth tape.
* Examines surface of roller for defects.
* Depresses pedal to raise water vat and starts lathe to rotate roller in vat.
* Polishes roller by either of following methods:
** (1) Moves polishing stone back and forth across length of roller, changing from coarse to finer grades of stone to impart acceptably smooth finish.
** (2) Mounts flat stone on spindle of polishing head, starts oscillation of stone, and lowers stone onto surface of rotating roller.
* Moves lever to engage gear that moves machine head back and forth over surface of roller.
* Changes stones on machine head to impart final polish.
* Examines polished rollers for rough spots, pinholes, and scratches.
* Rubs scratches and rough spots with burnishing tool to finish roller.
* Verifies circumference of polished roller, using girth tape.
* Cleans roller before and after polishing, using cloth, water, and detergents or cleaning solution.
Industry:Professional careers
A professional who sets up and operates grinding machines to grind threads on metal objects, such as screws, bolts, and micrometer spindles, and to grind internal and external surfaces of metal workpieces to specifications, following tooling instructions, standard charts, blueprints, and job orders, applying knowledge of grinding procedures. Respnsibilities include:
* Reads blueprint and job order for product specifications, such as dimensions, tolerances, and number of parts to be ground, and tooling instructions, such as grinding speeds, feed rates, holding fixtures, and grinding wheel to be used.
* Mounts wheel on spindle, using wrenches.
* Dresses wheel to specifications, using dressing device.
* Sets machine controls to specified grinding speeds, feed rates, and angle of wheel.
* Positions and tightens cams and stops to control depth of cut and length of stroke.
* Lifts and positions workpiece, manually or using hoist, and secures workpiece on faceplate or magnetic chuck, in fixture or chuck, or directly to machine table.
* Starts machine and activates controls to feed wheel against workpiece or vice versa, or engages automatic feeding device.
* Verifies dimensions of finished workpiece for conformance to specifications, using measuring instruments, such as micrometers, calipers, preset gauges, load test equipment, thread measuring wires, and thread gauges.
* Changes worn grinding wheel, using wrenches.
* May place workpiece in hopper or fixture of automatic feeding device.
* May grind nonmetallic materials.
* May be required to have experience with custom or production work or with specific type of machine, material, product, or precision level and be designated Grinder Set-Up Operator, External; Grinder Set-Up Operator, Internal; Grinder Set-Up Operator, Surface; Grinder Set-Up Operator, Thread.
Industry:Professional careers
A professional who sets up and operates grinding machines to shape and sharpen planer knives and woodworking machine cutters according to specifications. Respnsibilities include:
* Positions and secures workpiece or sheet stock, template, and machine accessories onto machine, using handtools.
* Turns handwheels to set travel and pressure of cutterhead or knife stock across or against grinding wheel to shape or sharpen workpiece.
* Starts machine and observes grinding operation to verify conformance to specifications.
* May cut out plastic templates used to fabricate knives and cutterheads.
* May hone cutting edge of ground knives, using whetstone and oil.
* May cut and grind silicon carbide jointing stones to match pattern of knives.
* May select and install grinding wheels on machine, using handtools, applying knowledge of product specifications and abrasives.
* May manipulate blade across grinding wheel by hand.
* May turn valve to control flow of coolant.
* May sharpen or shape knives and saw blades, using handtools.
* May sharpen bits and boring tool.
Industry:Professional careers
A professional who sets up and operates multiple stage deburring machine to smooth edges and set (establish) width of mainspring strip. Respnsibilities include:
* Threads strip from feeding roll through deburring cutters to winding roll, aligning cutters and adjusting cutters for specified width.
* Makes trial run, cuts off piece of deburred strip, examines piece under microscope, and adjusts cutters to correct deficiencies in operation.
* Adjusts and sharpens cutters on diamond wheel, using mechanic's tools.
* Works to tolerances of 0.0005 inch.
Industry:Professional careers
A professional who operates grinding machine to grind blocked watch parts to size. Respnsibilities include:
* Places blocks on magnetic chuck and regulates feed and depth of grinding wheel cut to grind parts to specified thickness, working to tolerances of 0.0005 to 0.0001 inch.
* Removes blocks to measure thickness with upright gauge to ensure conformance to specifications.
* Dresses chuck by running grinding wheel across chuck slowly.
* Laps part for finish after grinding by putting blocks, parts side down, under pressure pads of lapping machine, putting oil and emery on lapping surface, and setting timer for specified time.
Industry:Professional careers
A professional who operates grinding machine to grind blocked watch parts to size. Respnsibilities include:
* Places blocks on magnetic chuck and regulates feed and depth of grinding wheel cut to grind parts to specified thickness, working to tolerances of 0.0005 to 0.0001 inch.
* Removes blocks to measure thickness with upright gauge to ensure conformance to specifications.
* Dresses chuck by running grinding wheel across chuck slowly.
* Laps part for finish after grinding by putting blocks, parts side down, under pressure pads of lapping machine, putting oil and emery on lapping surface, and setting timer for specified time.
Industry:Professional careers
A professional who operates honing machines to hone internal or external surfaces of metal parts, such as cylinders, bearings, and connecting rods to specifications, usually on production basis. Respnsibilities include:
* Obtains such information as dimensions, tolerances, and number of parts in run from job order and instructions of machine-shop supervisor, production or job setter, honing.
* Lifts workpiece manually or with hoist and secures it in fixture.
* Starts machine and turns handwheels or engages automatic mechanism to feed tool to workpiece.
* Moves controls to adjust feed rate, spindle speed, length of stroke, and depth of cut.
* Measures finished workpiece with instruments, such as calipers, fixed gauges, and micrometers.
* Changes worn tools, using wrenches.
* May read blueprints.
* May assist job setter, honing to set up machine.
* May be required to have experience with particular material, or product, with machine of particular size, type, or trade name, and be designated accordingly.
Industry:Professional careers
A professional who sharpens and smooths cutting edge of tools, such as axes, chisels, drills, picks, and straight cutting blades, using abrasive wheel. Respnsibilities include:
* Presses button to start abrasive wheel.
* Positions and holds cutting edge of tool against machine guide and abrasive wheel to sharpen and smooth tool edge.
* Immerses tool in oil to cool edge.
* Repositions and holds tool edge against guide and abrasive wheel to further sharpen and smooth edge.
* May heat tools and immerse them in brine, oil, or water to harden them.
* May remove burrs from ground edges of tools, using whetstone.
* May sharpen and reduce diameter of circular cutting blades.
* May be designated according to kind of tool sharpened as ax sharpener; chisel grinder; knife and spur grinder; knife grinder.
Industry:Professional careers
A professional who sharpens and smooths cutting edge of tools, such as axes, chisels, drills, picks, and straight cutting blades, using abrasive wheel. Respnsibilities include:
* Presses button to start abrasive wheel.
* Positions and holds cutting edge of tool against machine guide and abrasive wheel to sharpen and smooth tool edge.
* Immerses tool in oil to cool edge.
* Repositions and holds tool edge against guide and abrasive wheel to further sharpen and smooth edge.
* May heat tools and immerse them in brine, oil, or water to harden them.
* May remove burrs from ground edges of tools, using whetstone.
* May sharpen and reduce diameter of circular cutting blades.
* May be designated according to kind of tool sharpened as ax sharpener; chisel grinder; knife and spur grinder; knife grinder.
Industry:Professional careers
