Therefore, study on the spindle vibration characteristics is meaningful to improve the processing quality and prolong the hob life for gear hobbing machine tools. The hobbing vibration, as the biggest effect factor, affects the gear processing quality in three ways, i.e., deviation of meshing point between hob and workpiece, additional dynamic load to hob causing the acceleration of cutting tool wear and vibration marks on the gear surface. These include the servo motor(s), guide screw, hydraulic cylinders and hobbing vibration. In the processing of high-speed-heavy-duty gear hobbing, there are many vibration sources. With the booming of the auto industry, there are more requirements for gear hobbing accuracy. The high-speed cutting hobbing machine tool is a kind of specialized CNC (computerized numerical control) machine tool for gear processing.
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