Forging Pressure Of Metal Billet By Forging Machinery

Forging is one of the two main components of forging (forging and stamping), which is used to exert pressure on metal billet to produce plastic deformation to obtain a certain mechanical property, shape and dimension forging. The forging can eliminate the defects such as the loose cast in the smelting process, optimize the microstructure, and the mechanical properties of the forgings are generally superior to those of the same material because the complete metal streamline is preserved. The important parts with high load and severe working conditions in the related machinery, besides the simple shape can be used for rolling plate, profile or welding parts, the forging is more adopted.

According to the movement mode of forging die, forging can be divided into swing, swing forging, roll forging, cross wedge rolling, rolling ring and inclined rolling. Rotary, swing forging and rolling ring can also be used for precision forging process. In order to improve the utilization ratio of materials, roll forging and rolling can be used as the front process of slender materials. The same as the rotary forging of forging is also a local forming, its advantage is compared with the forging size, less forging force can be achieved in the case of formation. This method of forging, including open forging, expands from the mold surface to the free surface, therefore, it is difficult to guarantee the precision, so the movement direction of the forging die and the spinning process of the computer control, the use of lower forging force can be used to obtain complex shape, high precision products, such as production of many varieties, large size of the turbine blades and other forgings.

Forging equipment of the mold movement and freedom is inconsistent, according to the lower dead-dead deformation limit characteristics, forging equipment can be divided into the following four types:

1, limit the form of forging force: oil pressure directly drive the slider hydraulic press.

2, the quasi-stroke restriction mode: Hydraulic press driving crank linkage.

3, stroke limit mode: crank, connecting rod and wedge mechanism drive slide block mechanical press.

4. Energy restriction mode: screw and friction press with screw mechanism. In order to obtain high accuracy should be careful to prevent the next dead point overload, control speed and mold position. Because these will have an impact on forgings tolerances, shape accuracy and forging die life. In addition, in order to maintain the accuracy, we should also pay attention to adjust the slider rail clearance, ensure stiffness, adjust the lower dead dead and the use of aid transmission devices and other measures.