This presentation reviews various induction camshaft hardening technologies presently used in industry. The Pros and Cons of different processes will be analyzed. The causes for hardness pattern deviation and excessive distortion will be assessed. Advanced non-rotational CamPro camshaft hardening technology will be discussed. This process lends itself for hardening several camshaft lobes. Therefore, high production rates can be achieved by statically heat treating multiple cam lobes simultaneously. One of the major advantages of this non-rotational camshaft hardening technology is related to its ability to harden camshafts with practically undetectable distortion, minimizing needed grinding stock and, in some cases, completely eliminating the necessity of the entire subsequent camshaft straightening operation. Another attractive feature of this process is related to its ability to produce uniform true contour hardness patterns, regardless of the complexity of lobe profile, its size, topology and topography of the camshaft. Heat patterns are "locked in place" and very repeatable since neither the camshaft nor the inductors are moving during the heat treating operation. Depending upon the specifics of the camshaft's geometry and heat treat specifications, the combined savings on energy consumption may exceed 18% comparted to commonly used processes.
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