- Industri: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who sets up and operates jig borer to perform machining operations, such as boring, drilling, reaming, and counterboring holes in metal workpieces, such as jigs, fixtures, gauges, and dies, according to specifications, applying knowledge of metal properties, tooling, and precision machining. Respnsibilities include:
* Studies machining instructions, such as job order, blueprint, process sheet, or layout on workpiece to determine dimensional and finish specifications, sequence of operation, setup, and tooling requirements.
* Lifts workpiece either manually or with hoist onto machine table.
* Positions and secures workpiece on table with bolts, clamps, shims, or other holding devices, using machinist's handtools.
* Verifies parallelism of reference lines on workpiece to axis of table motion, using dial indicator mounted in spindle.
* Establishes zero reference point on workpiece, such as at intersection of two edges or over hole location.
* Turns handwheel to adjust machine table to align spindle over point, using dial indicator.
* Sets table-position dial at zero; measures all machining locations from this zero point.
* Selects and sets cutting speeds, feed rates, depth of cut, and cutting tool according to machining instructions or knowledge of metal properties.
* Installs tool in spindle.
* Turns handwheels to lower tool to workpiece and engages automatic feed.
* Turns valve and directs flow of coolant or cutting oil over cutting area.
* Verifies location and dimensions of holes, using measuring instruments, such as dial indicator, gauge blocks, telescoping gauge and internal micrometer.
* Works to tolerances as close as plus or minus 0.0001 inch.
* May work only from blueprint.
* May lay out reference lines and machining locations on workpiece, according to blueprint, using layout tools, such as rule, divider, and scriber, applying knowledge of shop mathematics and layout techniques.
* May fasten workpiece in holding fixture mounted on machine table or clamp jig or template in position on workpiece.
* May operate machine manually throughout first piece operation to verify accuracy of setup.
* May sharpen tools on bench grinder.
Industry:Professional careers
A professional who sets up and operates horizontal boring, drilling, and milling machine to perform machining operations, such as milling, drilling, boring, and reaming metal workpieces, such as machine, tool, or die parts, analyzing specifications and deciding on tooling according to knowledge of shop mathematics, metal properties, and machining procedures. Respnsibilities include:
* Studies machining instructions, such as job order, blueprint, process sheet, or layout on workpiece to determine machining required, sequence of operation, tooling, feed, and speed rate, applying knowledge of materials and machining.
* Lifts workpiece either manually or with crane or hoist onto machine table or directs monorail crane operator to put workpiece on machine table.
* Positions and secures workpiece to table or angle plate, using clamps, shims, and parallel blocks and verifies position with such instruments as dial indicators, gauge blocks, and height gauges.
* Selects and mounts tool in spindle.
* Moves controls to set feeds, speeds, and depth of cut, and to position tool and workpiece in relation to each other, verifying position visually, with instruments, such as thickness gauges, and by reading dials.
* Starts machine and observes operation, making one or more trial passes with manual control before engaging feed.
* Verifies dimensions of machined workpiece with such measuring instruments as micrometers, telescoping gauges, vernier calipers, and dial indicators.
* Works to tolerance of plus or minus 0.001 inch.
* May use precision positioning devices, such as dial indicators mounted on machine troughs with standard length rods and work to tolerance as close as plus or minus 0.0001 inch.
* May operate tracing attachment to duplicate contours from templates or models.
* May operate machine with automatic positioning controls.
* May lay out reference lines and machining locations on workpiece, according to blueprints, using layout tools, such as rule, divider, and scriber, applying knowledge of shop mathematics and layout techniques.
* May operate bench grinder to sharpen tools.
* May set up and operate vertical boring mill and be designated Boring-Mill Set-Up Operator, Vertical.
* Important variations may be indicated by trade names of machine used.
Industry:Professional careers
A professional who sets up and operates numerically controlled drill press that automatically performs machining operations such as drilling, reaming, countersinking, spot-facing, and tapping of holes in metal workpieces, according to specifications, setup instructions, and knowledge of machining. Respnsibilities include:
* Studies blueprints or setup instructions to determine dimensional specifications, setup requirements, and work procedure.
* Installs workpiece holders, such as blocks, risers, and clamps, on indexing table of machine, using machinist handtools.
* Lifts workpiece manually or with hoist and positions and secures it on machine table or in holding fixture with clamps and bolts.
* Installs cutting tools in tool magazine, turret, or spindle of machine.
* Inserts programmed tape or punched card in tape or card reader of control unit.
* Actuates machine that automatically positions indexing table containing workpiece under spindle, selects tool, and machines part according to programmed instructions.
* Stops machine after trial run and inspects machined workpiece to ensure conformance to blueprint specifications, using fixed gauges, dial indicators, micrometers, and calipers.
* Monitors machine operation and display panel of control unit for indications of malfunction.
* Notifies supervisor if machined workpiece does not conform to specifications or if machine malfunctions.
* May make manual adjustments, such as aligning workpiece on machine table, changing cutting tools, or setting cutting speed, feed rates, and depth of cut.
* May occasionally operate machine in semiautomatic mode by setting selector switch and manually dialing in data according to oral or written instructions to machine relatively simple pieces.
Industry:Professional careers
A professional who sets up and operates multiple-spindle drilling machine to perform simultaneously or in sequence machining operations, such as drilling, reaming, countersinking, spot-facing, and tapping of holes in metal workpieces, according to specifications, tooling instructions, standard charts, and knowledge of machining procedures. Respnsibilities include:
* Reads blueprint or job order for product specifications, such as hole locations and dimensions, and tooling instructions, such as drilling jigs, holding fixtures, feed rates, cutting speeds, and cutting tools to be used.
* Places workpiece in fixture or positions it on machine table, and secures it with clamps.
* Mounts cutting tools in spindles.
* Positions and secures specified drilling jig and moves controls and positions spindles to align tools with guide bushings in jig.
* Sets stops to control depth of cut.
* Moves controls to set cutting speeds and feed rates, and regulate flow of coolant.
* Engages power feed and observes machine operation.
* Periodically verifies conformance of machined work to specifications, using such measuring instruments as calipers, micrometers, and fixed gauges.
* May machine plastics or other nonmetallic materials.
* May tilt table or spindles to machine holes at specified angles.
Industry:Professional careers
A professional who sets up and operates radial drill press to perform drilling and other machining operations, such as boring, reaming, and tapping holes in metal workpieces, such as castings, forgings, and weldments, according to specifications, machining instructions, and knowledge of machining. Respnsibilities include:
* Studies specifications and machining instructions, such as job order, blueprint, process sheet, or layout on workpiece, to determine hole locations and size and setup requirements, including tooling, feed rates, and cutting speeds.
* Plans sequence of operation, determines suitable work holding arrangement, and fastens holding fixture or jig on machine base to hold workpiece and guide cutting tool.
* Lifts workpiece manually or with hoist and positions and secures it on machine base or in fixture or jig with clamps and bolts.
* Verifies position with surface gauges and height gauges.
* Selects cutting tool, installs it in machine spindle, and moves controls to set cutting speeds and feed rates, according to machining instructions or knowledge of metal properties.
* Operates controls to swing radial arm over workpiece, position cutting tool over hole center location, engage power feed, and to advance tool into workpiece.
* Turns valve handle to start flow of cutting oil and coolant against cutting tool and workpiece.
* Observes machining operation and periodically verifies conformance of machined workpiece to specifications, using measuring instruments, such as telescoping gauges, dial indicators, and micrometers.
* May measure, mark, and scribe reference lines and hole locations on workpiece, according to blueprint, using layout tools, such as rule, divider, and scriber, applying knowledge of shop mathematics and layout techniques.
* May operate universal-type machine, computing and setting angles of tilting spindle.
* May work on nonmetallic materials.
* May sharpen cutting tools, using bench grinder.
Industry:Professional careers
A professional who sets up and operates radial drill press to perform drilling and other machining operations, such as boring, reaming, and tapping of holes in metal workpieces, such as machine, tool, or die parts, usually on custom basis, analyzing specifications and deciding on tooling according to knowledge of machining. Respnsibilities include:
* Studies blueprint or layout on workpiece and plans sequence of operations.
* Selects method of holding workpiece.
* Positions and secures workpiece onto machine table, using such devices as shims, blocks, and planer gauges. Verifies position with surface gauges and height gauges.
* Selects cutting speeds, feed rates, and tool for each operation, according to knowledge of metal properties and shop mathematics.
* Positions and secures tool in spindle.
* Swings radial arm and moves controls to position spindle and tool along arm over hole center location, to set feeds and speeds, to feed tool in workpiece, and to engage feed.
* Turns valve handle to direct flow of coolant or cutting oil against tool and workpiece.
* Observes operation and regulates tool position and action.
* Verifies hole location and dimensions, using measuring instruments, such as telescoping gauges, micrometers, and dial indicators.
* May measure, mark, and scribe workpiece.
* May operate universal-type machine, computing and setting angles of tilting spindle.
* May work on nonmetallic materials.
* May operate bench grinder to sharpen tools.
Industry:Professional careers
A professional who operates automatic reamer to ream and mill drilled holes in clarinet posts. Respnsibilities include:
* Secures reaming tool in chuck of machine.
* Positions hole over reamer and reams as specified.
* Secures mill shaft in machine chuck.
* Mounts mill on end of mill shaft.
* Mills clarinet post flat on each side of reamed hole to specified tolerances.
* Verifies milling with go-not-go gauge.
Industry:Professional careers
A professional who sets up and operates numerically controlled jig-boring machine to perform machining operations, such as boring, drilling and counter-sinking holes in metal workpieces according to specifications and setup instructions, applying knowledge of metal properties and machining methods. Respnsibilities include:
* Studies blueprints and setup instructions to determine machining required, dimensional specifications, and work procedures and methods.
* Installs work-holding devices, such as blocks and clamps on indexing table of machine, using handtools.
* Lifts workpiece manually or with hoist and positions and secures it on machine table or in holding device.
* Inserts cutting tool in spindle of machine.
* Inserts punched card or loads perforated or magnetic tape containing programmed instructions into reader of control unit.
* Pushes button to zero indexing table and console at established locating point.
* Sets conventional cams, stops, and dial-type switches on machine head as indicated on setup instructions if machine spindle is not under numerical control.
* Actuates machine that automatically positions indexing table containing workpiece under spindle and machines part according to programmed instructions.
* Inspects and measures dimensions of machined workpiece to verify conformance to specifications and shop standards, using precision measuring instruments, such as precision gauges, dial indicators, micrometers, and calipers.
* Monitors machine operation and display panel of control unit for indications of malfunctions.
* Notifies supervisor if machined workpiece does not conform to specifications or if machine malfunctions.
* May make manual adjustments, such as setting cutting speed, feed rate, and depth of cut.
* May operate machine in semiautomatic mode by setting selector switch and manually dialing in data according to oral or written instructions to machine relatively simple pieces.
* May operate machine as inspection machine in manner similar to normal operations by inserting precision measuring instrument in spindle and moving machine through cycle under automatic or manual mode to indicate deviations from prescribed tolerances.
Industry:Professional careers
A professional who sets up and operates numerical-control drilling machine to drill holes into printed circuit boards (PCB's). Respnsibilities include:
* Reviews setup instructions and specifications.
* Loads control media containing programmed commands into control console of machine or enters commands to retrieve programmed control data.
* Attaches depth collars to drill bits and measures bit depth, using depth gauge, to verify specified drill bit cutting depth.
* Measures drill bit sizes, using micrometer, and installs specified drill bits in tool magazine of machine.
* Positions and secures PCB's to indexing table of machine.
* Enters commands to activate machine that automatically aligns indexing table and printed circuit boards under spindle, selects drill bit, and drills holes of specified dimension, location, and sequence into PCB's.
* Monitors machine operation and display readouts to detect malfunctions.
* Compares display data to specifications and notifies supervisor of machine malfunctions.
* Inspects and measures drilled PCB's to verify conformance to specifications, using measuring devices, such as micrometer, plug gauges, and test board.
* Performs machine adjustments and maintenance, such as setting speed and feed rates, cleaning machine parts, and replacing worn or damaged drill bits, using handtools.
Industry:Professional careers
A professional who sets up and operates boring machines to bore, drill, tap, spot face, groove, mill, or ream metal workpieces according to specifications, tooling instructions, and standard charts, applying knowledge of boring procedures and machining methods. Respnsibilities include:
* Reads blueprint or job order for product specifications, such as hole locations and dimensions, and tooling instructions, such as fixtures, feed rates, cutting speeds, and cutting tools to be used.
* Positions and secures cutting tool in toolholder, and toolholder in spindle.
* Lifts and positions workpiece, manually or using hoist, and secures workpiece in machine table fixture, using wrenches and clamps.
* Moves controls to position tool in relation to workpiece, and to set feed rate, cutting speed, and depth of cut.
* Starts machine, moves controls to feed tool against workpiece, or to engage automatic feeding device.
* Turns valve handle to direct flow of coolant onto cutting area.
* Observes machine operation, and removes and inspects machined workpiece to verify conformance to specifications, using instruments, such as fixed and air gauges, calipers, and micrometers.
* May compute cutting speeds, feed rates, and dimensions, using standard charts and shop mathematics.
Industry:Professional careers
