Casting or other workpiece, through percussion or other pressure impact to obtain better strength of the process. In this way, the performance and strength of the products are stronger than casting. For example, hammering is a traditional forging process.
Forging is generally the re-processing of castings or bars, often seen in automobiles and valves. Simple in appearance, bulky in size.
That means, the object of a certain shape is put under the punching machine, which is equipped with a mold, and the product designed in the mold is rushed out with the punch.
Stamping is the processing of thin metal, with complex appearance and fine size.
Forging and stamping is always to use the mold molding. But stamping technical requirements and content and dimensional accuracy is much higher than forging.