The forging process of gears has also been studied by numerical simulation in China. Liu Quankun, Hu Chengliang and Wang Qiang studied the influence of die geometry on metal flow. Three different die design schemes were analyzed and compared by using numerical simulation method, and a reasonable and feasible scheme was obtained.
Zhang Qingping, Zhao Guoqun and others proposed a new scheme of closed die forging of spur cylindrical gear formed by two-step inward shunting method, and simulated the forming process by three-dimensional rigid plastic finite element method. Zhan Xianyi, Liu Zhanfang and Liu daolun developed a three-dimensional finite element analysis system for gear precision forging, The system can analyze the mechanical response in the forging process and obtain the relevant data such as the stress and strain of the upper die, workpiece and lower die. Wang Huajun, Xia Juchen and Cheng Peiyuan simulated the precision forging of driven spiral bevel gear, obtained the deformation process of gear forging, explained the reason why it is difficult to cold precision forging of large section spiral bevel gear, and put forward the process scheme of precision forging of driven spiral bevel gear.
Yang Shenhua and Kou Shuqing studied the cold block forging precision forming process of car differential planetary gear and half shaft gear, analyzed it by finite element method, and studied and designed a special hydraulic die base system. Fang Yuan, Luo Shanming and Wang Wei studied the influence of the main structural parameters of the gear such as the number of teeth, modulus and pressure angle on the precision forging of spiral bevel gear by using the three-dimensional rigid plastic finite element method. The results show that when other parameters remain unchanged, the smaller the number of teeth and modulus, the smaller the forming load, and the change of pressure angle has little effect on the forming load.
He Wangzhi and Luo Shanming analyzed the warm forging process of spiral bevel gear by using rigid plastic finite element method, and analyzed the effects of friction, blank temperature, preheating temperature, forging speed and other parameters on the forging load, die temperature field and die wear of spiral bevel gear.
Jiang Wenbin and Gong Dongmei studied the cold forging of cylindrical spur gears. The effects of process parameters such as friction, forming speed and shunt aperture on forming load were studied by numerical simulation. The results show that the friction force and shunt aperture have a great influence on the forming load, and the forming speed has a little influence on the forming load.
Chong Dongmei also studied the cold forging process of large module cylindrical spur gear by using floating die and radial split affinity process, and carried out numerical simulation by using finite element software, and obtained the data of metal flow law and forming load in the deformation process.