- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who sets up and operates one or more multiple-spindle lathe-type screw machines equipped with automatic indexing and feeding mechanisms to perform turning, boring, threading, and facing operations on metal bar stock on custom basis, analyzing specifications and deciding on tooling according to knowledge of screw-machine operations. Respnsibilities include:
* Studies blueprint, visualizes machining to be done, dimensions of parts and permissible tolerances, and plans sequence of operations.
* Visualizes movements of machine parts, workpieces, and tools in each operation in relation to others, and decides on station and timing of each operation to assure efficient use of tools and time.
* Selects cutting speeds, feed rates, depth of cuts, and cutting tools to be used on basis of experience and knowledge of metal properties and shop mathematics.
* Installs collets, bushings, and stock pushers in stock-feeding mechanism, using wrenches and screwdrivers.
* Installs and adjusts cams, gears, and stops to control stock and tool movements at each station.
* Positions and secures tools in tool holders, verifying positions with gauges and other measuring instruments.
* Moves controls to set cutting speeds and feed rates.
* Cranks machine through cycle, stopping machine and adjusting tool positions and machine controls to allow for such factors as timing, clearance between moving parts, and chip removal.
* Starts machine, observes operation, and verifies conformance to specifications of first-run and sample workpieces, using such instruments as plug and ring gauges, calipers, and micrometers.
* Replaces worn tools.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May set up and operate single-spindle screw machine.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name.
* May set up machines for other workers.
Industry:Professional careers
A professional who sets up and operates one or more single-spindle lathe-type screw machines equipped with automatic feeding and tool-indexing mechanisms to perform turning, boring, threading, and facing operations on metal bar stock on custom basis, analyzing specifications and deciding on tooling according to knowledge of screw machine operations. Respnsibilities include:
* Studies blueprint to visualize machining to be done, dimensions of parts and permissible tolerances, and plans sequence of operations.
* Selects cutting speeds, feed rates, depth of cuts, and cutting tools to be used on basis of knowledge of metal properties and shop mathematics.
* Installs collets, bushings, and stock pushers in stock-feeding mechanism, using wrenches and screwdrivers, and loads with bar stock manually or with hoist.
* Installs and adjusts cams, gears, and stops to control stock and tool movements.
* Positions and secures tools in tool holders, verifying positions with gauges and other measuring instruments.
* Moves controls to set cutting speeds and feed rates.
* Starts machine, observes operations, and verifies conformance of first-run and sample workpieces to specifications, using such instruments as plug and ring gauges, calipers, and micrometers.
* Replaces worn tools.
* May operate bench grinder or cutter-grinding machine to sharpen tools.
* May machine plastics or other nonmetallic materials.
* May be required to have experience with particular material or product or machine of particular size, type, or trade name, and be designated accordingly.
* May set up machines for other workers.
Industry:Professional careers
A professional who sets up and operates turret lathe to perform series of machining operations, such as turning, facing, boring, and tapping, on metal workpieces, such as machine, tool, or die parts, analyzing specifications and deciding on tooling, applying knowledge of metal properties, shop mathematics, and turret-lathe operations. Respnsibilities include:
* Studies blueprint to visualize machining to be done, and plans sequence of operations.
* Selects and installs work-holding fixtures on machine, such as collets, faceplates, two-jaw chuck, or specially-shaped holding devices, and positions and secures workpiece in holding fixture, using wrenches.
* Selects cutting speed, tool feed rate, depth of cut, and cutting tools for each operation, according to knowledge of metal properties and shop mathematics.
* Positions and secures tools in toolholders at each station of turret and cross-slide toolpost, and positions tools in relation to workpiece.
* Moves stops, cams, or levers to control rotation of workpiece and feeding of tools.
* Turns handwheels to feed tools to and along workpiece and to indexing toolholders between operations, or engages feeding and indexing mechanisms.
* Turns valve to direct flow of coolant, against tool and workpiece.
* Verifies conformance of machined workpiece to specifications, using measuring instruments, such as gauges, calipers, and micrometer.
* May sharpen tools with bench grinder. May operate tracing attachment to duplicate profile of template or model on workpiece.
* May work on nonmetallic materials, such as plastics.
* May be required to have specialized experience with particular material, product, precision level, machining process, or size, type, or trade name of lathe.
* May be designated according to whether lathe is primarily equipped to machine bar stock fed through headstock of screw machine as tool screw-machine set-up operator; or workpiece held in chuck as tool chucking-machine set-up operator.
* May be designated according to type of lathe as vertical tool turret-lathe set-up operator.
Industry:Professional careers
A professional who sets up automatic spinning lathe to spin (form) shaped articles from sheet or plate metal as specified by blueprints and computed from data charts. Respnsibilities include:
* Bolts specified spinning chuck to headstock spindle and follow block to tailstock, using handtools or power tools.
* Positions, aligns, and bolts specified circular forming tool on hydraulic carriage according to diameter and thickness of metal disk, using such measuring tools as calipers, micrometers, and verniers.
* Turns control knobs to set speed of lathe and feed speed of carriage according to chart.
* Makes trial run and measures dimensions of first piece for conformance to blueprint specifications.
* May set up automatic spinning lathe equipped with special forming tools to shape, trim, or form knurls or beads on workpiece and be designated Setter, Automatic-Spinning-And-Beading-Lathe.
Industry:Professional careers
A professional who sets up and operates numerically controlled horizontal lathe to perform machining operations, such as turning, boring, facing, and threading parts, such as castings, forgings, and bar stock. Respnsibilities include:
* Reads process sheets, blueprints, and sketches of part to determine machining to be done, dimensional specifications, set up, and operating requirements.
* Inserts beginning point of tape in reading head of control unit.
* Mounts workpiece between centers, in chuck, or to faceplate, manually or using hoist.
* Selects and installs preset tooling in tool posts, turrets or indexing heads, and automatic-tool-change magazine, in sequence specified on process sheet.
* Depresses buttons, toggles, or sets tape and starts machining operation.
* Observes numerical displays on control panel and compares with data on process sheet to verify dimensional adjustments, feed rates, and speeds of machining cuts.
* Turns dials and switches to override tape control and correct machine performance, applying practical knowledge of lathe operation.
* Inspects first-run piece and spot-checks succeeding pieces for conformance to specifications, using micrometers and precision dial gauges.
* Studies job packet and organizes materials for next run during automatic tape-controlled cycles to shorten changeover time.
* May set tools before positioning them in lathe, using precision gauges and instruments.
* May set up and operate another machine tool during tape-controlled machining cycles.
* May machine nonmetallic materials.
* May be designated by type of lathe operated as engine lathe operator, numerical control; turret lathe operator, numerical control.
Industry:Professional careers
A professional who sets up and operates one or more single- or multiple-spindle horizontal chucking machines (lathes) to perform series of machining operations, such as turning, boring, threading, and facing, on metal workpieces, such as castings, forgings and bar stock, according to specifications, tooling instructions, standard charts, and knowledge of turning procedures. Respnsibilities include:
* Reads blueprint, job order, tooling instructions, or standard charts to determine product specifications, work-holding arrangement, cutting speeds, feed rates, and cutting tools to be used.
* Attaches specified chuck or chuck jaws to headstock, using wrenches.
* Moves controls, cams, and stops to set rotation speeds and feed rates and to control tool and workpiece movement for specified operations.
* Lifts workpiece manually or using hoist, and positions and secures it in chuck.
* Turns handwheels to position tools in relation to workpiece.
* Turns valve handle and directs flow of coolant against tools and workpiece.
* Starts machine, and moves controls to adjust positions and movements of tools during machine operation.
* Verifies conformance of turned workpieces to specifications, using measuring instruments, such as micrometers, calipers, and fixed gauges.
* May be required to decide on station and timing of each operation to assure efficient use of tools and time.
* May set up automatic device to feed workpieces to machine.
* May compute such data as dimensions, rotation speeds, and feed rates, using knowledge of shop mathematics and metal properties.
* Important variations are custom or production work; size or trade name of machine operated; types of metals or products machined; or work site (plant or job shop).
* May set up machines for other workers.
Industry:Professional careers
A professional who sets up and operates one or more single- or multiple-spindle horizontal chucking machines (lathes) to perform series of machining operations, such as turning, boring, threading, and facing, on metal workpieces, such as castings, forgings and bar stock, according to specifications, tooling instructions, standard charts, and knowledge of turning procedures. Respnsibilities include:
* Reads blueprint, job order, tooling instructions, or standard charts to determine product specifications, work-holding arrangement, cutting speeds, feed rates, and cutting tools to be used.
* Attaches specified chuck or chuck jaws to headstock, using wrenches.
* Moves controls, cams, and stops to set rotation speeds and feed rates and to control tool and workpiece movement for specified operations.
* Lifts workpiece manually or using hoist, and positions and secures it in chuck.
* Turns handwheels to position tools in relation to workpiece.
* Turns valve handle and directs flow of coolant against tools and workpiece.
* Starts machine, and moves controls to adjust positions and movements of tools during machine operation.
* Verifies conformance of turned workpieces to specifications, using measuring instruments, such as micrometers, calipers, and fixed gauges.
* May be required to decide on station and timing of each operation to assure efficient use of tools and time.
* May set up automatic device to feed workpieces to machine.
* May compute such data as dimensions, rotation speeds, and feed rates, using knowledge of shop mathematics and metal properties.
* Important variations are custom or production work; size or trade name of machine operated; types of metals or products machined; or work site (plant or job shop).
* May set up machines for other workers.
Industry:Professional careers
A professional who sets up and operates one or more multiple-spindle vertical chucking machines (lathes) to perform series of machining operations, such as turning, boring, threading, and facing on metal workpieces, such as castings, forgings, and bar stock, according to specifications, tooling instructions, standard charts, and knowledge of turning procedures. Respnsibilities include:
* Reads blueprint, job order, tooling instructions, and standard charts to determine product specifications, work-holding arrangement, and cutting speeds, feed rates, and cutting tools to be used.
* Visualizes movements of machine parts, workpieces, and tools in each operation in relation to others, and decides on station and timing of each operation to assure efficient use of tools and time.
* Installs specified chucks or holding fixtures on headstocks, and places and secures workpiece in holding device.
* Positions and secures tools and toolholders to toolheads.
* Moves controls, stops, and cams to set specified rotation speeds and feed rates, and to control timing and action of tools at each station.
* Starts machine, turns valve handle, and directs flow of coolant against tools and workpieces.
* Stops machine and verifies conformance of workpiece to specifications after initial machining operation, using fixed gauges, calipers, and micrometers.
* May compute such data as dimensions, rotation speeds, feed rates, tool setting angles, and machining times, using knowledge of shop mathematics and metal properties.
* May work on nonmetallic materials, such as plastics.
* May set up and operate machine to machine first-run workpiece only and be designated Chucking-Machine Setter, Multiple Spindle, Vertical.
* May be required to have experience with particular material or product, or with machine of particular size, type, or trade name and be designated accordingly.
Industry:Professional careers
A professional who sets up and operates engine lathes to machine metallic and nonmetallic workpieces according to specifications, tooling instructions, and standard charts, applying knowledge of machining methods. Respnsibilities include:
* Reads blueprint or job order for specifications, such as dimensions and tolerances, tooling instructions on holding devices, feed rates, cutting speeds, depth of cuts, and cutting tools.
* Positions and secures tools in holders, using wrenches.
* Lifts workpiece manually or with hoist, and positions and secures workpiece in holding device, machine table, chuck, centers, or fixture, using clamps and wrenches.
* Sets specified rotation speed, feed rate, and depth of cut, and positions tool in relation to workpiece.
* Starts machine, turns handwheels to feed tool to workpiece, and engages feed.
* Turns valve handle to direct flow of coolant against tool and workpiece.
* Observes cutting action of machine to detect excessive wear or malfunction.
* Verifies conformance of machined workpiece to specifications, using micrometers, calipers, and fixed gauges.
* May scribe reference lines on workpiece, using scale, or template and scriber, to lay out interrelated surfaces, lengths, and depths of cut.
* May compute unspecified dimensions and machine settings, using knowledge of metal properties and shop mathematics.
* May set up tracing attachment that guides cutting tool to follow movement of tracing stylus along template to duplicate template profile on turned workpiece and be designated Tracing-Lathe Set-Up Operator.
* May be required to have experience with custom or production work, or with particular material, product, level of precision, or size, type, or trade name of machine.
Industry:Professional careers
A professional who sets up and operates engine lathes to machine metallic and nonmetallic workpieces according to specifications, tooling instructions, and standard charts, applying knowledge of machining methods. Respnsibilities include:
* Reads blueprint or job order for specifications, such as dimensions and tolerances, tooling instructions on holding devices, feed rates, cutting speeds, depth of cuts, and cutting tools.
* Positions and secures tools in holders, using wrenches.
* Lifts workpiece manually or with hoist, and positions and secures workpiece in holding device, machine table, chuck, centers, or fixture, using clamps and wrenches.
* Sets specified rotation speed, feed rate, and depth of cut, and positions tool in relation to workpiece.
* Starts machine, turns handwheels to feed tool to workpiece, and engages feed.
* Turns valve handle to direct flow of coolant against tool and workpiece.
* Observes cutting action of machine to detect excessive wear or malfunction.
* Verifies conformance of machined workpiece to specifications, using micrometers, calipers, and fixed gauges.
* May scribe reference lines on workpiece, using scale, or template and scriber, to lay out interrelated surfaces, lengths, and depths of cut.
* May compute unspecified dimensions and machine settings, using knowledge of metal properties and shop mathematics.
* May set up tracing attachment that guides cutting tool to follow movement of tracing stylus along template to duplicate template profile on turned workpiece and be designated Tracing-Lathe Set-Up Operator.
* May be required to have experience with custom or production work, or with particular material, product, level of precision, or size, type, or trade name of machine.
Industry:Professional careers
