Method and system for laser hardening of a surface of a workpiece
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United States of America Patent
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Mar 30, 2021
Grant Date -
Jan 3, 2019
app pub date -
Sep 10, 2018
filing date -
Sep 6, 2012
priority date (Note) -
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Abstract
A method of laser hardening of a surface area of a workpiece, such as a surface of a journal of a crankshaft, including the steps of generating a relative movement between the surface of the workpiece and a laser source to allow a laser spot to subsequently be projected onto different portions of the surface area, and during the relative movement, repetitively scanning the laser beam so as to produce a two-dimensional equivalent effective laser spot on the surface area. The energy distribution of the effective laser spot is adapted so that it is different in a more heat sensitive subarea, such as in an area adjacent to an oil lubrication opening, than in a less heat sensitive subarea, so as to prevent overheating of the more heat sensitive subarea.
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