"WELDING-MACHINE OPERATOR, ELECTRON BEAM"
Job Description and Jobs
Job Description:
- 1) Sets up and operates electron beam welding machine to join metal workpieces according to specifications, applying knowledge of electron-beam welding: Cleans and assembles part, using solvents, degreasing equipment, and press or oven.
- 2) Checks part for magnetic field, using Gauss meter, and places part on automatic demagnetizer.
- 3) Selects holding fixture according to size and type of workpiece and installs fixture into welding position.
- 4) Selects target block and fastens block to fixture to make beam adjustments and prevent damage to equipment.
- 5) Turns on power supply and water cooling and air pumping systems.
- 6) Closes chamber door and activates pumping stages to create vacuum.
- 7) Reviews specifications or examines sample parts to determine equipment settings, applying knowledge of electron-beam welding and metal characteristics.
- 8) Adjusts current setting to heat filament or cathode and adjusts high voltage setting on anode.
- 9) Aligns target block in horizontal and lateral directions, using hand and foot controls.
- 10) Rotates polarized filter to darken image in optical viewing system.
- 11) Activates beam and adjusts anode voltage and beam current to regulate depth of weld.
- 12) Adjusts current to magnetic lens to focus beam in specific positions.
- 13) Moves workpiece under electron beam during welding, using handtools.
- 14) Turns off beam, opens chamber, and removes target block.
- 15) Inspects section of workpiece for depth of weld penetration, width of joining cracks, holes, and inclusions, using microscope.
- 16) Performs mechanical strength tests and records results.
- 17) Cleans weld chamber and replaces filament, using handtools.
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DOT: 815.382-010
Job Number: 11964