All aspects of forging will affect the internal quality or appearance quality of the forging. Therefore, we must strictly follow the forging process to complete each process and conduct quality inspections in time. Forging is a plastic forming process that uses the plasticity of metal to make the blank material obtain a certain shape and structure under the impact or pressure of the tool. It is usually divided into four types: free die forging, extrusion die forging, partial die forging and isothermal die forging.
1. Free die forging
Usually between two flat or cavityless molds. The forging tool has high elasticity, short manufacturing cycle and low cost. However, the labor intensity is high, the operation is difficult, the productivity is low, and the quality of the forgings is not high. Therefore, it can only be used when there are no special requirements for the performance of the parts and the number of pieces is small.
2. Extrusion die forging
There are two types of extrusion die forging, namely forward extrusion die forging and reverse extrusion die forging. Extrusion die forging can produce various hollow and solid parts, and can obtain forgings with high geometrical accuracy and denser internal structure.
3. Partial die forging
Primarily for forging large monolithic forgings under existing hydraulic pressure. First, the forgings are processed in sections, and then one part is processed at a time, so the tonnage of the required equipment can be very small, which is conducive to saving production costs. In general, this method can be used to process large forgings on medium-sized hydraulic presses.
4. Isothermal die forging
Before forging, the die is heated to the forging temperature of the blank, and on this basis, the titanium alloy material is processed and deformed. It should be noted that the temperature of the die and the blank need to be kept consistent throughout the forging process, so that a large deformation can be obtained under the action of a small deformation force.
