Forming numerical analysis and experiment research on hot rolling of straight face gear

As a new manufacturing method of minimal metal loss, coherent metal streamline, and higher load-bearing capacity for straight face gears, hot rolling forming can effectively improve the forming quality and the fatigue strength of face gear. In this paper, the key technologies involved in hot rolling process are studied, and hot rolling forming simulation of straight face gears is realized by using Deform-3D. Orthogonal simulation experiments are carried out by introducing three evaluation indexes, such as proportion coefficient of lug, metal streamline defect, and rolling force. Combining with the multi-objective process parameter optimization method of improved DEMATEL (decision making trial and evaluation laboratory) and improved TOPSIS (technique for order preference by similarity to an ideal solution), the optimal combination of technological parameters for hot rolling of straight face gear is accurately determined. Based on the optimal combination of parameters, the hot rolling manufacturing experiment of straight face gear is realized. The rationality of the optimal technological parameters and the feasibility of the rolling forming manufacturing technology are verified by simulation results and experiment results, and the theoretical basis and practical value for the precision manufacturing of rolled face gear are provided.