. American engineer and railroad journal . d is to heata bar of one inch or one and one-fourth inch iron on the endfor five or six inches, then blow a stream of air against the endof the bar parallel with its length: a beautiful display of fire- * Note connection with previous article. September, 1907 AMERICAN ENGINEER AND RAILROAD JOURNAL. 345 works will be the result, the temperature of the bar will beraised to a point of fusion and the bar will melt away as in thefoundry cupola. We have been quite successful in making large crank pin nutswith the aid of this method. A piece of bar iron 2 x
. American engineer and railroad journal . d is to heata bar of one inch or one and one-fourth inch iron on the endfor five or six inches, then blow a stream of air against the endof the bar parallel with its length: a beautiful display of fire- * Note connection with previous article. September, 1907 AMERICAN ENGINEER AND RAILROAD JOURNAL. 345 works will be the result, the temperature of the bar will beraised to a point of fusion and the bar will melt away as in thefoundry cupola. We have been quite successful in making large crank pin nutswith the aid of this method. A piece of bar iron 2 x J4. in- isrounded up under the hammer, each end of the bar being shearedto an angle of 45 degrees so as to form a lap. These pieces ofiron are heated in an oil furnace, placed between the dies of theforging machine, a jet of air is blown against the two ends,which cleans out all dirt and scale and raises the temperature ofthe metal to a welding heat, one stroke of the machine insuringa perfect weld with clean metal. THE SURCHARGE FIG. 4. DEVICE FOR BENDING AND PUNCHING STEEL RATCHET PAWLS. The same method is used in welding thecross bar on our clinker hooks for locomotiveservice. The end of the long rod and a shortbar are both heated to a welding heat in ouroil furnace; the long rod is butted against theshort piece and placed between the dies, whereit comes in contact with the jet of compressedair, which blows out all scale and dirt, bring-ing the two pieces to a perfect welding heatand one stroke of the machine completes theweld and upsets the metal so as to strengthenthe hook at the point of intersection. In repairing and welding broken spokes orrims in steel driving wheels, we think the com-pressed air jet is indispensable. Some of thewheels are very difficult to handle owing tothe counterbalance and it is very difficult toget a wheel from the fire to the anvil withoutlosing the heat. By using the compressed airjet it is possible to revive the heat and theparts to
Size: 2222px × 1125px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
