Job Description:

• 1) Controls shrink-pit furnace to assemble hoops and liners to tubes to form cannon barrels: Positions steel blocks in shrink-pit to form angle for subsequent positioning of tube so that breech end of tube will be at floor level.

• 2) Cleans and oils contact surfaces of parts with gasoline, oil, and graphite to facilitate assembly.

• 3) Lowers hoops into furnace, using hoist.

• 4) Moves furnace controls and observes thermocouple pyrometer and recording potentiometer to heat furnace to specified temperature.

• 5) Guides cold tube, lowered by crane, through hot hoops in furnace.

• 6) Turns water valve on cooling ring and lowers ring into furnace, using hoist, to spray hoops and shrink them onto tube.

• 7) Reheats hoop and tube assembly, guides liner into tube, and regulates water spray to shrink tube onto liner.