Harry Dodd


The purpose of this investigation was to develop a method that could be used to estimate the necessary bore load on a part quenched in a quenching machine with an expanding segmented die. Such a method would be of special benefit to gear manufacturers with little quenching experience; and it could also help to greatly reduce or eliminate the very costly trial and error procedure presently used. The method must be simple enough to be used in a production situation. Such a method has been developed for estimating the expander cylinder force required to produce the greatest amount of correction in the out of round of a ring part with the least expansion of the bore. The theory has been developed for each portion of the procedure. Elastic deflections and stresses of the part, as predicted by the theory, have been compared with a finite element modeled part which agreed with the theory within 8%. Also, two test cases were made to determine how well the overall procedure compared with actual successful production examples, and it was found that the procedure does quite accurately predict the necessary bore loads. The limitations of the procedure and other factors not included in the procedure have been discussed.

Library of Congress Subject Headings

Elasticity; Strength of materials; Materials at high temperatures

Publication Date


Document Type


Department, Program, or Center

Mechanical Engineering (KGCOE)


Hetnarski, Richard


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TA418.24.D62


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