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Job Description:

  • 1) Sets up and operates flame-spray equipment and machine tools to build up worn parts, such as crankshafts, motor shafts, clutch plates, and piston rods, and to salvage defective machined parts, according to specifications: Washes object with solvents, or heats object with torch or in furnace to remove impurities, such as grease or paint.

  • 2) Operates machines, such as engine lathes and external grinders, to undercut or groove surface of object.

  • 3) Cleans and roughens surface of object in sand or shotblast cabinet or by electrobonding process.

  • 4) Preheats object for spraying, using oxyacetylene torch or metalizing gun.

  • 5) Sprays metal or other material on object by either of following methods: Positions and clamps metalizing gun to engine lathe carriage.

  • 6) Selects nozzle to accommodate size of wire to be sprayed and screws nozzle into place on metalizing gun.

  • 7) Inserts wire to be sprayed into rear of gun and through feed rollers and nozzle.

  • 8) Connects hoses from gun to air compressor and tanks of oxygen and fuel gas, such as acetylene.

  • 9) Turns knobs to synchronize speed of wire feed, air pressure, flow of oxygen and fuel indicated on dials to specifications computed from data charts.

  • 10) Installs gears in lathe and turns knobs to synchronize rotating speed of chuck and movement of carriage with rate of spray to achieve specified coating on workpiece.

  • 11) Ignites gases to melt wire and presses button or trigger to release compressed air which atomizes and sprays molten metal onto workpiece.

  • 12) Pours specified powder of metal or other material, such as ceramics, into hopper mounted on metalizing gun.

  • 13) Selects nozzle according to type of powder to be used and screws nozzle into place on gun.

  • 14) Turns dials and valves to synchronize feeding rate of powder and flow of oxygen and fuel gas, according to type of powder used.

  • 15) Ignites gases and presses button or trigger to start flow of powder which is atomized and sprayed onto workpiece.

  • 16) Heats object with torch or in heat-treating furnace to fuse coatings, and cools object slowly to prevent cracking.

  • 17) Measures object, using measuring instruments, such as micrometers, gauges, and calipers, to determine conformance to specifications.

  • 18) Operates portable metalizing gun to fill cracks, holes, and apply coating to restore flat or irregular surfaces of machined, forged, or cast objects to original dimensions.

  • 19) May operate machines, such as engine lathes, turret lathes, or precision grinders, to machine-coat objects to original specifications.

  • 20) May spray protective coatings of corrosion-resistant metal onto metal objects.

  • 21) May tend portable air compressors, sandblasting guns, and set up metalizing gun on lathes in customers' plants to repair damaged, worn, or improperly machined parts.

  • 22) May be designated according to type of metalizing equipment used as Thermospray Operator.




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End Of Job Description for: "METAL SPRAYER, MACHINED PARTS"
DOT:   505.380-010

Job Number: 6421