The difference between forging stamping and casting

1. The difference between forging and casting

Casting: It is to turn shapeless molten metal into a solid shape. Forging: is to transform a solid of one shape into a solid of another shape.

The simple understanding of casting is to melt the raw materials, and then put the raw materials into the pre-prepared mold for molding. As a simple practice, you can buy some candles, and then you melt the candles, and after filling the melted wax into random objects, wait for the wax to solidify to obtain the corresponding shape, and this shape follows your filling Changes due to changes in objects. Its shape change is: solid-liquid-solid. The so-called casting is the process of casting molten metal into a mold to obtain a casting. The casting major focuses on the metal smelting process and the control of the process during the casting process.

Forging: It is to prepare raw materials of a size comparable to the target shape, and use hammering to make them into corresponding shapes. This includes free forging and die forging. Just like you prepare the dough, when you beat the dough into the shape you want with your experience, it is similar to free forging; when you use the prepared plastic mold to extrude the dough, it is similar to in die forging. Finally, under high temperature, the shape of the dough is completely fixed. This is the principle of forging. Its form change is solid-solid. Forging is plastic forming in solid state, which can be divided into hot working and cold working, such as extrusion, drawing, thickening, punching, etc. all belong to forging. Forging is slowly forming, and casting is one-time forming. Casting molten liquid metal fills the cavity and cools down. Pores are prone to occur in the middle of the workpiece. It is mainly formed by extrusion at high temperature. The grains in the workpiece can be refined.

2. The difference between free forging and die forging

Free forging is a processing method in which the heated metal material is placed between the upper and lower whetstones of the forging equipment, and impact force or pressure is applied to directly cause the blank to undergo plastic deformation, thereby obtaining the required forging. The shape of the forging is simple and the operation is flexible. It is suitable for the production of single pieces, small batches and heavy forgings. Free forging is divided into manual free forging and machine free forging. Manual free forging has low production efficiency and high labor intensity. The production of small batches of forgings In modern industrial production, machine free forging has become the main method of forging production, and it plays a particularly important role in heavy machinery manufacturing.

Die forging is called model forging. The heated blank is placed in the forging die fixed on the die forging equipment for forging.

Die forging can be performed on a variety of equipment. In industrial production, steam-air hammers are mostly used for upper die forging with a tonnage of 5KN~300KN. Hot die forging presses are commonly used for die forging on presses, with a tonnage of 25000KN~63000KN. Jiahangaero uses hot die forging, with a tonnage span of 240T-4000T, which can meet most of the needs of the market.

3. The difference between casting, forging, stamping and casting

(1) Casting is to melt the raw material to let it form naturally in the forming mold

Forging is to heat the raw material to a certain temperature and then use tools to forge it into shape. Stamping is to stamp the raw material with a suitable stamping die. Die casting is to use pressure to inject the melted raw material into the mold on the basis of casting to obtain a higher density or higher density. precise shape

Casting: Molten liquid metal fills the cavity and cools down. Pores are prone to occur in the middle of the workpiece.

(2) Forging: It is mainly formed by hammering at high temperature, which can refine the grains in the workpiece.

The thickness of the parts is basically the same, which is suitable for stamping with sheet metal forming. Die-casting is used for parts with different thicknesses, complex shapes, and those that are not exposed to heat.

① Casting is divided into two types: high-pressure casting and low-pressure casting. Simply put, after the metal is melted, the pressure of the mold is different, the temperature of the heating metal and the machine used for casting are different.

② Forging is also a method of casting, the difference is that the temperature during forging is lower, and some metals can be made into finished products in a semi-molten state

③ Stamping is the process of making semi-finished products into finished products with machines such as punching machines at room temperature

④ Die-casting is also a way of high-temperature casting. When encountering castings with complex structure and difficulty, you can use a die-casting machine to heat the metal into a liquid state, press it into the mold, and open the mold after cooling to take out the product. A casting Way.