Distortion Engineering ----- Identification Of Causes And Strategies For Minimization In Mechanical Components
Power transmission parts (bearing rings, shafts and gear wheels) are widely used in the automotive industry and are manufactured by machining or cold forging. Different types of gears have been produced by forging in order to enhance the mechanical properties of the gears and the productivity of the process. However, a critical problem of the transmission components is the dimensional change or distortion caused by elastic recovery after forging or after heat treatment. In every survey that has been conducted in various industries, distortion is either the greatest or second largest concern among the steel heat treating community. Steel distortion control will exhibit tremendous effects on the profitability of any organization. Therefore it is not surprising that the ability to understand the overall distortion process and to be able to design solutions to this problem typically rank very high. In this paper, principle physical causes for the distortion of power transmission components are presented and discussed. Finally strategies for the minimization of distortion are derived.
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