Research on Cold Forging Process and Mold Design for High-Precision Meshing Tooth Hexagonal Bolt

In order to form a high-precision meshing tooth hexagonal bolt, this paper designs two forming process schemes: cutting, reducing diameter, pre- upsetting, extrusion teeth upsetting, and cutting edge, and cutting, reducing diameter, pre-upsetting, secondary upsetting, and extrusion teeth cutting edge. Deform-3D is used to perform finite element simulation on each station of the two schemes, and the simulation results of the two forming schemes are compared and analyzed from four aspects: the metal mesh streamline situation, node distribution situation, effective stress, and effective strain distribution state of the parts at each station. Deform-3D designs the mold structure for each station based on the forming schemes and workpiece size. The results show that both forming schemes can form high-precision meshing tooth hexagonal bolts without obvious defects, which can be used to guide the research of high-precision meshing tooth hexagonal bolt forming process and mold design.