| 摘要 |
PURPOSE: A fillet rolling method of crank shaft is provided to expand life span of the crank shaft by inspecting a fatigue of the crank shaft and selectively applying load of a pressing roller to the crank shaft. CONSTITUTION: Pressing load of an auxiliary roller at a dangerous portion of a fillet section(11) is in a range of 600-800kgf. In addition, 300-400kgf of pressing load is applied in remaining portion of the fillet section(11) in such a manner that load is efficiently applied when the auxiliary roller rotates 5-15 times, thereby preventing over bending and expanding life span of a crank shaft(10). A roller press applies load to the crank shaft(10) such that differential load is applied to each part of the crank shaft(10) along an outer wall of the crank shaft(10).
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