1. Classification of forging
1) According to the temperature when the metal is deformed: hot forging, warm forging and cold forging;
2) According to the source of the force at work: manual forging and machine forging.
Hand forging: Hand forging tools rely on manpower to perform on the anvil.
Machine forging: The main method of modern all metals forging production is carried out on various forging equipment.
3) According to the equipment and tools used, it can be divided into four categories:
Free forging: The heated metal blank is placed between the flat anvils of the free forging equipment or simple tool direction for forging.
Model forging: The heated metal blank is placed in a die fixed on the die forging equipment for forging.
Tire mold forging: It is a deformation from free forging to model forging. The blank is finally forged with a tire die on the free forging equipment. The tire mold is a single cavity mold that is not fixed on the equipment.
Special forging: a special forging process for forming metal blanks on special equipment or in special molds. Special forging includes the following processes: extrusion; precision die forging; ring rolling; roll forging; cross rolling; cross rolling; radial forging; multidirectional forging; powder forging.
2. The characteristics of the forging process
1) Metal forging can improve the structure of the metal and improve the mechanical and physical properties of the metal.
2) It can save metal materials and cutting man-hours.
3) It has high labor productivity.
4) Metal forging has great flexibility.