Research on forging forming force in the composite technology of cross wedge rolling (CWR) and forging for universal joint fork

Abstract

In this paper，the forging process of universal joint fork of automobile transmission shaft is simulated and the change of forming force of die forging is studied on the basis of the blank produced by cross wedge rolling (CWR). Temperature / T , friction factor / c and falling speed of upper die / V are the main process parameters affecting the forging forming force / F of universal joint fork. The effects of temperature, friction factor and speed on the forming force were studied respectively by single factor method. The results show that the lower the temperature, the greater the friction factor, the slower the speed, the greater the forming force, the more difficult for forming. The orthogonal test is designed and it obtained the order of process parameters affecting the forming force of die forging that is T > c > V and the best combination of process that the temperature is 1 100 °C the friction factor is 0,2 and speed of upper die is 150 mm/s.

Keywords

• CWR
• forging
• universal joint fork
• process parameters
• forming force