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.