Aiming at the problem of hobbing simulation based on solid modeling technology,a three-dimensional Dexel model simulation method of cylindrical gear hobbing was developed.The kinematics model of cylindrical gear hobbing was studied.According to the geometric parameters of hob and gear blank,the triangular mesh model was created and transformed into the Dexel model in the engine.At the same time,efficient CWE calculation and geometric simulation of undeformed chips were carried out by Delaunay triangulation and Alpha shape reconstruction.The bevel cutting model was used to calculate the force distribution of all meshing nodes at each time step.Finally,Liebherr LC500 gear hobbing machine was used to verify the proposed simulation method,and the rotating dynamometer and Kalman filter were combined to compensate the structural dynamics,so as to measure the cutting force accurately.The results show that the proposed method can be used to accurately predict the three-dimensional force distribution of discrete nodes along the edge of hobbing,and the prediction error (root mean square and standard deviation) is between 4% ~ 12%; when the cutting conditions change,the axial and lateral cutting forces can still be accurately predicted,which is helpful to further improve the efficiency and accuracy of hobbing simulation.