Forging mold is the use of forging machinery to apply pressure on metal blanks, so that it produces plastic deformation to obtain a certain mechanical properties, a certain shape and size of forging soldering processing methods, is one of the two major components of forging. By forging, the metal can be eliminated from the cast state loose, welding hole, forging mechanical properties are generally better than the same material castings.
Important parts with high load and severe working conditions in machinery are made of forgings in addition to sheets, profiles or welds that are simpler in shape and can be rolled.
1, forging according to the forming method
(1) Open forging (free forging)
The use of impact or pressure to deform the metal between the upper and lower two iron (blocks) to obtain the required forgings, mainly hand forging and mechanical forging.
(2) Closed mode forging
Metal blanks in a certain shape of the forging mold in the mold edgy deformation and obtain forgings, can be divided into die forging, cold, rotary forging, extrusion and so on.
2, according to the deformation temperature score
Forging can be divided into hot forged parts (processing temperature is higher than the recrystallization temperature of the blank metal), temperature forging (lower than the recrystallization temperature) and cold forging (room temperature). Forging materials are mainly carbon steel and alloy steel of various components, followed by aluminum, magnesium, titanium, copper and other alloys. The original state of the material is rod material, ingots, metal powder and liquid metal, the ratio of the cross-sectional area before deformation to the die-breaking area after deformation is called the forging ratio.
The correct choice of forging ratio has a lot to do with improving product quality and reducing costs.