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The difference between forging, stamping and casting


1. The difference between forging and casting

(1) Casting: It is a solid liquid having a shape that is not shaped.
Forging: A solid that turns a shape solid into another shape.
Casting is like playing wax, you buy wax (scrap, or pig iron) and then turn this wax into a liquid, put in a mold, so you get things of different shapes. (solid-liquid-solid)
Forging is like the process of making a pastry. You put the small dough into the mold and make it into a different shape. Almost the solid at high temperatures, the shape can be changed to another shape (solid to solid).
Casting is the process of casting molten metal into a mold to obtain a casting. Casting specialties focus on the metal smelting process and the process control during the casting process.
Forging is plastic forming in the solid state. There are hot processing, cold processing, such as extrusion, drawing, piercing, punching, etc. are all forged.
(2) Forging is slowly forming, casting is a molding
Casting: The molten liquid metal fills the cavity for cooling. Air holes are easily generated in the middle of the workpiece.
Forging: It is mainly formed by extrusion at high temperature. The grains in the part can be refined.
2. Stamping is the process of making a semi-finished product into a finished product at a normal temperature with a punching machine.
3. The difference between free forging and die forging
Free forging is a processing method in which the heated metal blank is placed on the forging equipment and the impact is pressed or pressed to directly deform the blank to obtain the desired forging. Simple shape and flexible operation, suitable for single piece, small batch and heavy forging production. Free forging manual free forging and machine free forging. Manual free forging production efficiency is low, labor intensity is large, only for repairing or simple, small, In the production of small batch forgings, in modern industrial production, free forging of machines has become the main method of forging production, and it plays a particularly important role in the manufacture of heavy machinery.
The die forging is collectively referred to as model forging, and the heated blank is placed in a forging die fixed to the die forging apparatus to be forged.
Die forging can be performed on a variety of equipment. In industrial production, hammer-on-die forging mostly uses steam-air hammers, with tonnages ranging from 5KN to 300KN (0.5 to 30t). Hot forging presses for die forging on presses, with tonnages ranging from 25,000 KN to 63000 KN.
The forging die structure of the die forging has a single die forging die and a multimode upsetting die. As shown in Figure 3-13, the single-die forging die is used to fix the forging die with the dovetail groove and the oblique wedge to prevent the out-and-out movement and the left-right movement. The combination of the key and the keyway makes the forging die accurate and prevents back and forth movement. The single-mode boring is generally a final forging die. Forging is often performed by air hammering, and then hammering is performed once by the final forging die. Finally, the forging is removed to remove the flash.
4. What is the difference in performance between cast steel and forged steel?
Generally, cast steel is brittle in performance and cannot be heat treated; forged steel has finer structure, good toughness and strength, and can be subjected to various heat treatments.
Relatively speaking, the same chemical composition, forged steel is more compact, better toughness and strength.
When forging, the metal is plastically deformed, has fine graining effect, and the cut fiber is continuous, so it is often used for the manufacture of important parts such as shaft and tooth theory.
Casting has requirements for being processed, and casting properties such as cast iron and aluminum are generally good. Casting does not have the many advantages of forging, but it can produce zeros with complex shapes, so it is often used for the manufacture of burrs of the nominal parts with low mechanical properties. For example, machine casings, etc.

5. The difference between casting, forging, stamping and casting
(1) Casting is to melt the raw materials and let them form naturally in the molding die.
Forging is to heat the raw material to a certain temperature and then use a tool for forging
Stamping is the stamping of raw materials with suitable stamping dies
Die casting is based on casting, using pressure to inject the melted material into the mold to obtain a higher density or more precise shape.
Casting: The molten liquid metal fills the cavity for cooling. Air holes are easily generated in the middle of the workpiece.
(2) Forging: It is mainly formed by extrusion at a high temperature. The grains in the part can be refined.
The parts are basically equivalent in thickness for stamping.
The thickness of the parts is very different, the shape is complex, and it is not hot, and it is die-cast.
1 casting is divided into two types: high pressure casting and low pressure casting. To put it simply, after the metal is melted, the pressure of the model is different, and the temperature of the heated metal is different from the machine used for casting.
2 Forging is also a way of casting, the difference is that the temperature during forging is lower, and some can be made into a finished product in a semi-melted state.

3 Die-casting is also a way of high-temperature casting. When encountering a casting with relatively complicated structure and relatively difficult structure, a die-casting machine can be used to heat the metal into a liquid state, press it into the mold, and then open the mold to remove the product. the way


DESHENGRUI Machinery is a professional CNC manufacturing and Sheet metal fabrication company, including CNC machining services, CNC Turning service, CNC milling services, CNC drilling services, laser cutting services, stamping services, Die casting service, iron casting service and Steel Forging service.


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