In the process of making the flange, the forging process generally consists of the following steps. In use, high-quality billet blanking, heating, forming, and forging cooling can be selected. The forging process is free forging, die forging and film forging. At the time of production, different forging methods are selected according to the quality of the forgings and the number of production batches.
When the flange is used, the free forging productivity is low, the machining allowance is large when the operation is performed, and the tool is simple and versatile in operation, so it is widely used for forging a single-piece, small-batch forging having a simple shape. Free forging equipment includes air hammer, steam-air hammer and hydraulic press, which are suitable for the production of small, medium and large forgings. Die forging has high productivity, simple operation, and easy mechanization and automation.
The flange forgings have high dimensional accuracy, and the machining allowance is small during operation. The fiber structure distribution of the forgings is more reasonable during operation, and the service life of the parts can be further improved during use. Forgings are freely forged. The shape is that the blank is gradually forged by some basic deformation process. The basic processes of free forging are upsetting, lengthening, punching, bending and cutting.
Upsetting is an operation in which the raw material is forged in the axial direction to reduce its height and increase the cross section. This procedure is commonly used for forging gear blanks and other disc-shaped forgings. The ups and downs are divided into two types: all upsetting and partial forging. The lengthening is a forging process that increases the length of the blank and reduces the section. It is usually used to produce shaft blanks, such as lathe spindles and connecting rods.