Forging process generally consists of the following procedures, namely, selecting high-quality billet cutting, heating, forming, forging cooling. Forging process methods include free forging, die forging and membrane forging. In production, according to the size of the forging quality, the number of production batches to choose different forging methods.
The productivity of free forging is low, the machining allowance is large, but the tool is simple, the versatility is big, so it is widely used in forging simple shape single piece, small batch production forging. The free forging equipment includes air hammer, steam-air hammer and hydraulic press, which are suitable for the production of small, medium and large forging respectively. Die forging high productivity, simple operation, easy to realize mechanization and automation. The die forging has high precision in size, small machining allowance and more reasonable distribution of fiber structure, which can further improve the service life of parts.
The basic process of free forging: free forging, the shape of the forging is through some basic deformation process will be gradually forged into the blank. The basic processes of free forging are upsetting, drawing, punching, bending and cutting.

  1. Upsetting Upsetting is the process of forging the original billet along the axial direction to reduce its height and increase its cross section. This process is commonly used for forging gear blanks and other disk type forgings. Upsetting is divided into all upsetting and local forging.
  2. Drawing length is to increase the length of the billet, the section of the forging process, usually used to produce shaft parts blank, such as lathe spindle, connecting rod and so on.
  3. A forging process in which a punch is used to punch through or through holes in a blank.
  4. A forging process in which the billet is bent into an angle or shape.
  5. A forging process in which one part of the billet is rotated by an angle relative to another.
  6. The forging process of cutting and dividing the blank or cutting the head.
    Casting flange and forging flange difference
    Casting flange, rough shape and size accurate, small processing capacity, low cost, but there are casting defects (porosity, crack, inclusion); The internal organization of the casting streamline is poor (if it is cutting parts, streamline is worse);
    Forging flange than casting flange carbon less easy to rust, forging streamline is good, compact organization, mechanical properties better than cast flange;
    Improper forging process will also appear large or uneven grains, hardening cracks, forging costs higher than the casting flange.
    Forgings can withstand higher shear and tensile forces than castings.
    The advantage of casting is that it can make a more complex shape, the cost is relatively low;
    The advantage of forging is that the internal structure is uniform and there is no harmful defects such as blowhole and inclusions in the casting.
    From the production process to distinguish between casting flange and forging flange, such as centrifugal flange is a casting flange.
    What is the main function of the flange?
    I don’t know about the flange, but I must have heard about the pipe connector. The flange is a general name of the pipe connection device.
    What are the benefits of the use of flanges? After the use of the flange simple, as long as the removal of late maintenance flange can repair, this is more convenient.
    At the same time there are a lot of flange material, stainless steel flange, galvanized flange, etc., according to the use of different venues and different environments, the material requirements of the flange will be different.
    Flange connection is to put two pipes, pipe fittings or equipment, first fixed in a flange, and then in between the two flange with flange pad, A detachable joint that is later bolted to tighten the two flanges to make them close together.
    This connection is mainly used for cast iron pipe, rubber liner, non-ferrous metal pipe and flange valve connection, etc., process equipment and flange connections are also used flange connection flange connection.