Theoretical analysis of the Influence of workpiece spindle vibration displacement on machining accuracy of gear hobbing machine

Abstract

In order to study the vibration characteristics of the workpiece spindle of a gear hobbing machine, this paper established a mathematical model for the workpiece spindle vibration displacement in the-axis direction. To verify the reliability of the proposed model, a series of experiments were run on the CNC gear hobbing machine. The relative error between the experimental data and the calculated values was lower than 5 %, which proves that our proposed mathematical model is qualified to be a research tool for the investigation of the variation law of the workpiece spindle. According to the analysis results, the workpiece spindle vibration displacement literally decreases with the increasing order, and the hobbing process with high hob revolution speed and small cutting depth is preferable for gear hobbing accuracy.

Prediction and optimization of hobbing parameters for minimizing energy consumption and gear geometric deviations

“…Li et al 8 developed a model of the coupling effect between thermal errors and force-induced errors and studied the effects of these errors on the hobbing accuracy based on simulations and field measurement methods. Yang et al 9 investigated the effects of the vibration characteristics of the workpiece spindle on the hobbing accuracy. Hu et al 10 established a multi-objective optimization model with the aim of balancing manufacturing costs with the overall accuracy of the hobbing machine, and they achieved ideal optimization results.…”