BackHomeNews & EventsShow Information

The Production Process of Forged Flanges


Forged flanges combine two separate machinery parts together.

The forging process generally consists of the following processes, namely selecting high quality billets for undercutting, heating, forming and cooling after forging. The forging process methods are free forging, die forging and film forging. When producing, according to the size of the forging quality, the number of production batch to choose different forging methods.

Free forging productivity is low, the processing allowance is large, but the tool is simple, universal, so it is widely used to forge the shape of a simple single piece, small batch production of forgings. Free forging equipment includes air hammers, steam-air hammers and water presses, which are suitable for the production of small, medium and large forgings respectively. Die forging is highly productive, simple to operate and easy to mechanise and automate. High dimensional accuracy, small machining allowance and more reasonable fibre distribution of the forgings can further improve the service life of the parts.

The basic process of free forging: In free forging, the shape of the forging is gradually forged into the billet through some basic deformation processes. The basic processes of free forging are upsetting, drawing, punching, bending and cutting.

Heading is the process of forging the original billet in the axial direction to reduce its height and increase its cross section. This process is commonly used to forge gear blanks and other disc-shaped forgings. Roughing is divided into two types: full roughing and partial roughing.

2.Drawing is a forging process that increases the length and decreases the cross-section of a billet, and is usually used to produce shaft blanks such as lathe spindles and connecting rods.

3.Punching A forging process in which a punch is used to punch a through-hole or non-through-hole in a billet.

4.Bending The forging process of bending a billet to a certain angle or shape.

5.Twisting A forging process in which one part of a billet is rotated at an angle with respect to another part.

6.Cutting A forging process in which a billet is split or the head is removed.

Die Forging

A forging process in which a heated billet is forged in a forging die fixed to a die forging machine.

The basic process of die forging The process of die forging is as follows: material, heating, pre-forging, final forging, punching, edge cutting, tempering and shot peening. Commonly used processes are upsetting, drawing, bending, punching and forming.

Commonly used die forging equipment Commonly used die forging equipment are die forging hammers, hot die forging presses, flat forging machines and friction presses.

Generally speaking, forged flanges are of better quality, generally produced by die forging, with fine crystal organization and high strength, but of course, the price is also expensive.

Whether casting flange or forging flange are flange common manufacturing methods, depending on the need to use the strength requirements of the components, if the requirements are not high, you can also choose to turn the system flange.

Cutting system flange

In the plate directly cut out the flange of the inner and outer diameter and thickness of the disk left processing amount, and then bolt holes and waterline processing. The flange produced in this way is called cut flange, the maximum diameter of such flange is limited to the width of the plate.

Rolled flange

Cut strips with the plate and then rolled into a round process is called rolled, more for some large flange production. After the successful roll system for welding, and then flattening, and then the waterline and bolt hole process.