Basic process of free forging
The basic processes of 2009-06-30 free forging are upsetting, elongation, stagger, punching, cutting, bending, twisting and forging welding, etc. |25045. Upsetting. When deforming, the length of ingot or billet is reduced, and the cross section is increased, and the impeller, the gear and the disc and other forgings can be produced. Extension. Reduce the cross section of the billet, increase its length, such as the production shaft, forging billet and so on. Stagger. Make a part of the billet to the other part of the relative displacement, stagger each other, the axis is still parallel to each other, more used for the production of crankshaft. Punching hole. Punch through holes or half through holes on the billet. Cutting. The blank is cut into several parts, such as the remainder of the feeder and the bottom of the ingot is cut. The bending. According to the requirements of the workpiece, each part of the billet is bent along the axis into various angles. The reverse. Make a part of the billet rotate to another part around the same axis, used to produce the crank shaft. The forging and welding. The two pieces of blank forged into a block.
The basic process of forging including upsetting, stretching, punching, bending, torsion, displacement, cutting and welding etc.. [pull] also known as "extension", it is to make the billet cross-sectional area decreased, increasing the length of the forging process. Drawing is often used in forging and axle parts. There are mainly two ways to pull out: 1. Pull out on the flat anvil. 2. Pull out the mandrel. When forging, the mandrel is inserted into the blank which is punched into the hole, and then pulled out as a solid billet. When stretching is generally not a pull, the blank is drawn into a hexagonal form to the desired length after forging, and then remove the mandrel chamfering rounding. In order to remove the mandrel, the working part of the mandrel should have a slope of about 1:100. This method can increase the length of hollow billets, decrease the wall thickness and keep the inner diameter unchanged. They are often used for forging long hollow forgings with sleeves. Upsetting is a forging process that reduces the height of the blank and increases the cross sectional area. Upsetting process is mainly used for forging gear blank and round cake forgings. Upsetting process can effectively improve the microstructure of billets and decrease the anisotropy of mechanical properties. The morphology and distribution of carbides in high alloy tool steel can be improved by repeated upsetting and pulling out. Upsetting mainly has the following three forms: 1, upsetting completely. The full upsetting is to place the blank vertically on the anvil surface, and under the hammer of the upper anvil, the plastic deformation at the height of the billet is reduced and the cross sectional area increases.
