1) Die forging die
(1) Pre-forging die. The effect of the pre-forging die is to deform the blank to a shape and size close to that of the Auger excavation tooth forgings, so that in the final forging, the metal easily fills the die to obtain the size required for the forging. For forgings of simple shape or when the batch size is small, the pre-forging die is not required. The fillet and pitch of the pre-forging die are much larger than the final forging die and there is no flash groove.
(2) Final forging die. The function of the final forging die is to deform the blank to the shape and size required by the Auger excavation tooth forgings. Therefore, its shape should be the same as the shape of the forged piece; however, the size of the final forging die is required because the forging is to be cooled when it is cooled. A contraction amount should be enlarged compared to the forging size. Steel forgings shrink by 1.5%. In addition, there are flash grooves around the die to increase the resistance of the metal from the die, to cause the metal to fill the die while accommodating excess metal.