Forging and sheet metal stamping are collectively referred to as forging. Forging is the use of forging equipment to apply external force to the heated metal to plastically deform to form a part blank with certain shape, size and microstructure. The internal structure of the forged blank is dense and uniform. The distribution of metal streamlines is reasonable, which improves the strength of the parts. Therefore, forging is often used to manufacture blanks for parts with high comprehensive mechanical properties.
Forging can be divided into free forging, model forging and die forging.
Free forging is to place the metal between the upper and lower irons for plastic deformation of the metal. The use of free-flowing aluminum alloy has low vortex rate and low precision. It is generally used to produce forgings with small batches and simple shapes.
Model forging is to deform the metal in the die cavity of the forging die. The plastic flow of the metal is restricted by the die cavity. The forming efficiency is high, the precision is high, and the metal streamline distribution is more reasonable. However, due to the high cost of mold manufacturing, it is usually used for mass production. The forging force required for forging with the free-slightly Yujiu-Ci model is large, and it cannot be used for the forging of large-scale forgings.
Die forging is to forge metal using die forging on free forging equipment. The tire mold is simple to manufacture, low cost and convenient to form, but the forming accuracy is not high, and it is often used to produce small forgings with low precision requirements.
On the sheet metal stamping machine, the die is used to stamp the sheet into various shapes and sizes. Stamping processing has extremely high productivity and high processing accuracy, and its processing forms include blanking, bending, deep drawing, and forming. Blanking is the process of punching sheet metal into various flat parts. Forming processes such as bending and deep drawing punch the sheet into various three-dimensional parts. Sheet metal stamping has a long way to go in electrical products, light industrial products, and automobile manufacturing.