Welding; theory, practice, apparatus and tests, electric, thermit and hot-flame processes (1910) (14760101376)

Identifier: weldingtheorypra00hart (find matches)

Title: Welding; theory, practice, apparatus and tests, electric, thermit and hot-flame processes

Year: 1910 (1910s)

Authors: Hart, Richard N. (Richard Newell), b. 1882

Subjects: Welding

Publisher: New York (etc.) McGraw-Hill book company

Contributing Library: The Library of Congress

Digitizing Sponsor: Sloan Foundation

Text Appearing Before Image:

ns were made to effect the welds in the usualway, the rudder-post weld being reinforced by a collar 3 incheslong and i inch thick, while the stern-post was reinforced with acollar 8 inches long, i inch thick at the top and sides, and 3/4 ^iMmMMBm^I^^B V Ij Wi! ! 1 d Fig. 85.—Thermit weld on stem post of steamship Sochem. inch thick at the bottom; the latter being done in order that thedraught of the vessel might not be made any greater than could behelped. One hundred and fifty pounds of thermit, 25 pounds ofsteel punchings, and 3 pounds of metallic manganese were usedin welding the rudder-post, while 350 pounds of thermit, 70pounds of steel rivets (i by 3/8 inch in size) and 7 pounds ofmetallic manganese were required for welding the stern frame.While the total time required for the operation amounted to THE THERMIT PROCESS I5I five working days, there is little doubt that had the work beendone in a properly equipped dry-dock, it could have been ac-complished in three days or less.

Text Appearing After Image:

Pig 86.—Weld made at shops of the central railroad of New Jersey on a motor armature shaft. Weld of Electric Motor Shaft It has usually been deemed necessary to leave a reinforce-ment or collar of thermit steel around the various welds madeby the thermit process. An instance has occurred recently, 152 WELDING however, where this reinforcement was machined off and theweld subjected to ^ery severe strains, but without causing anyweakness to show up. The case in question is that of an armature shaft 3 inches indiameter, 14 1/2 inches long, and required to transmit 50 h.p.to the main hoist of a 50-ton Shaw electric crane. The weld was made in the shops of the Central Railroad ofNew Jersey, Elizabethport, N. J., and the armature has now beenin service since October 8 and is giving perfect satisfaction in spiteof the fact that all the surplus metal about the weld was machinedoff and the shaft turned down to its original diameter. The weld was made 9 inches from the hub, and is shown inthe

thermite welding welding theory practice apparatus and tests electric thermit and hot flame processes 1910 book illustrations images from internet archive library of congress new jersey

1910

Library of Congress

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