- Industri: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends milling machine that cuts edges of watch levers. Respnsibilities include:
* Pulls handle to clamp levers in special machine fitting.
* Turns controls to bring work into contact with cutting tool.
* Pulls handle to release clamp, and removes milled levers.
* Verifies conformity of levers to specifications, using gauge.
Industry:Professional careers
A professional who tends milling machines that mill surfaces of metal workpieces according to specifications. Respnsibilities include:
* Positions and secures workpiece in fixture or feeding device.
* Starts machine, and turns handwheel to feed workpiece to cutter or vice versa, or engages automatic feeding mechanism.
* Turns valve handle to direct flow of coolant against cutter and workpiece.
* Observes machine operation, and removes and inspects machined workpiece to verify conformance to specifications, using instruments, such as gauges, calipers, micrometers, and templates.
* May change worn cutters, using wrenches.
* Records production output.
* May tend machine that mills workpiece according to programmed cycle.
* May turn controls to adjust feed rate of workpiece or speed of cutting tool.
* May mill nonmetallic materials.
Industry:Professional careers
A professional who tends semiautomatic planing machine that cuts off excess metal and imparts smooth surface to such watch parts as balance cocks and train bridges. Respnsibilities include:
* Places single part in chuck of machine, depresses pedal to close chuck, trips starting handle, and observes machine which planes piece and ejects it from chuck at end of cycle.
* Measures thickness of parts with dial indicator.
Industry:Professional careers
A professional who tends battery of previously set-up profiling machines that trace templates to cut recesses in watch plates and chamfer edges, undercutting metal to form partially hidden recesses, in watch parts, such as pillar plates and train bridges. Respnsibilities include:
* Blows metal shavings and dust from work plate, using air compressor.
* Fits blanks over protruding pins of chuck or in nest of work plate and pulls lever to clamp them in place.
* Starts machine and loads second machine while first is operating.
* Depresses pedal to eject workpiece or directs air blast to blow workpiece into catch pan after machine stops at end of cycle.
* Verifies thickness of metal below recess, and contour of recess, using jeweler's loupe and precision gauges.
* Important variables may be indicated by trade name of machine used.
Industry:Professional careers
A professional who tends battery of previously set-up profiling machines that trace templates to cut recesses in watch plates and chamfer edges, undercutting metal to form partially hidden recesses, in watch parts, such as pillar plates and train bridges. Respnsibilities include:
* Blows metal shavings and dust from work plate, using air compressor.
* Fits blanks over protruding pins of chuck or in nest of work plate and pulls lever to clamp them in place.
* Starts machine and loads second machine while first is operating.
* Depresses pedal to eject workpiece or directs air blast to blow workpiece into catch pan after machine stops at end of cycle.
* Verifies thickness of metal below recess, and contour of recess, using jeweler's loupe and precision gauges.
* Important variables may be indicated by trade name of machine used.
Industry:Professional careers
A professional who tends machine that inscribes graduations in metal surface of measuring tools, such as carpenter's steel squares and rules, and machinist's scales. Respnsibilities include:
* Slides workpiece into spring clamp on machine carriage.
* Starts machine that scribes graduations along length of tool by automatic indexing of multiple scribing points or cutters.
* Removes scribed tool at end of cycle and examines and compares it with master scale to verify legibility and accuracy of graduations.
Industry:Professional careers
A professional who tends battery of automatic squaring machines that mill (file) flat round sides of engaging portions of winding stems and barrel arbors. Respnsibilities include:
* Loads sleevelike feeding magazines with stems or barrels, using tweezers.
* Inserts magazine in machine and starts machine.
* Inspects parts, using loupe, to see that square is centered on stem (sides are milled flat leaving rounded corners).
* Gauges squares in go-not-go gauge.
Industry:Professional careers
A professional who tends battery of semiautomatic milling machines to cut teeth in clock and watch parts, such as barrels, pinions, wheels, and clutches. Respnsibilities include:
* Slides stack of wheel or pinion blanks on fluted arbor, clamps on holding collar, inserts arbor into machine chuck, and clamps in place, using pedal, or opens work holder and inserts barrel or pinion blanks into holder, using tweezers.
* Pushes lever to start machine which automatically indexes and cuts teeth around periphery of blanks.
* Loads remaining machines.
* Removes arbor or individually machined parts from milling machine which automatically stops at end of cycle.
* Verifies shapes of tooth and quality of cut, using jeweler's loupe, thickness of tooth, using jaw gauge, outside diameter of part, using go-not-go gauge, and length of part, using upright gauge.
* May adjust machine when machined product does not conform to standards.
* May clamp arbor in machine chuck manually.
* May be designated according to type of machine used as hobbing machine tooth cutter; or according to type of tooth cut as tooth clutch cutter; pinion tooth cutter; spur tooth cutter.
Industry:Professional careers
A professional who tends routing machine that trims edges of plastic drafting scales. Respnsibilities include:
* Places and secures router tool in chuck.
* Places and clamps scale on holding pin of routing machine conveyor belt.
* Starts machine and observes movement of scale under router.
* Removes trimmed scale from conveyor and inspects completed work to maintain establishment standards.
* May tend routing machine that re-routes graduation lines removed accidentally during previous operations and be known as Rework Machine Operator.
Industry:Professional careers
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
