The process initial forging temperature of spiral bevel gear forging is 1000-1100 ° C. here, we discuss the relationship between spiral bevel gear forging energy consumption and initial forging temperature from the perspective of energy saving. The higher the initial forging temperature of spiral bevel gear blank, the more energy is required to heat to this temperature, but the higher the temperature, the less forging energy is required. Therefore, the objective function of optimization is min (E), e = heating energy + forging energy. The mass of spiral bevel gear blank is 4.5kg, and the specific heat capacity is 0.46kj/kg ° C.
The forging process of spiral bevel gear blank with friction coefficient of 0.3 and initial forging temperature of 1000 ° C, 1050 ° C and 1100 ° C is numerically simulated, and the forging energy consumption curves with initial forging temperature of 1000 ° C, 1050 ° C and 1100 ° C are obtained, as shown in the figure.
When the initial forging temperature is 1000 ° C, the forging energy consumption is 87.17kj, when the initial forging temperature is 1050 ° C, the forging energy consumption of spiral bevel gear is 85.52kj, and when the initial forging temperature is 1100 ° C, the forging energy consumption is 84.08kj.
The energy of spiral bevel gear at different initial forging temperatures is shown in the table.
| Initial forging temperature(°C) | 1000 | 1050 | 1100 |
| Energy required for heating(KJ) | 2070 | 2173.5 | 2277 |
| Forging energy consumption(kJ) | 87.17 | 85.52 | 84.08 |
| Total energy consumption(KJ) | 2057.17 | 2259.02 | 2361.08 |
To sum up, when the initial forging temperature of spiral bevel gear is in the range of 1000-1100 ° C, the difference of forging energy consumption of spiral bevel gear is far less than that of heating, and the total energy consumption at 1000 ° C is the smallest. Therefore, if the initial forging temperature of the workpiece is considered from the perspective of energy saving, it is recommended that the initial forging temperature of spiral bevel gear is 1000 ° C.