Abstract
According to high-frequency chattering of workpiece overhanging the support area of the NC rotary table while gear milling, overhanging rigidity of the table was analyzed and the auxiliary support program was bring up. Online test of gear milling can be used to establish dynamic model of the overhanging structure. For enhancing increase the axial rigidity and circumferential damping of the rotary table, a kind of auxiliary support apparatus with hydraulic pressure was designed to reduce the influence of high-frequency chattering on gear milling, which doesn’t affect circular division accuracy. As a result, efficiency of gear milling was increased more than 3 times and the machining diameter of workpiece was increased from 2250mm to 3200mm, so the auxiliary support equipment can be used on many kinds of NC rotary table and machine tool.
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