Tel: +86-0731-88672086   E-mail:
Home » News » Pipe News » The production process flow of forged steel flange

The production process flow of forged steel flange

Views: 1     Author: Site Editor     Publish Time: 2023-10-12      Origin: Site

The production process flow of forged flange:

The forging process generally consists of the following steps, namely, selecting high-quality steel billets, cutting, heating, forming, and cooling after forging. The forging process methods include free forging, die forging, and membrane forging. During production, different forging methods are selected according to the quality of the forgings and the size of the production batch.

Free forging has low productivity and a large machining allowance, but the tools are simple and versatile, so it is widely used for forging single pieces with simple shapes and small batch production of forgings. Free forging equipment includes air hammers, steam-air hammers, and hydraulic presses, which are suitable for the production of small, medium, and large forgings respectively. Die forging has high productivity, simple operation, and easy mechanization and automation. Die forgings have high dimensional accuracy, small machining allowances, and more reasonable fiber tissue distribution, which can further increase the service life of the parts.

Basic processes of free forging: During free forging, the shape of the forging is gradually forged from the blank through some basic deformation processes. The basic processes of free forging include upsetting, drawing, punching, bending, and cutting.

1. Upsetting Upsetting is an operation process of forging the original blank along the axial direction to reduce its height and increase its cross-section. This process is commonly used for forging gear blanks and other disc-shaped forgings. Upsetting is divided into two types: total upsetting and partial forging.

2. Drawing is a forging process that increases the length of the blank and reduces the cross-section. It is usually used to produce blanks for shafts, such as lathe spindles, connecting rods, etc.

3. Punching is a forging process in which a punch is used to punch out a through hole or a non-through hole in the blank.

4. Bending is a forging process that bends the blank into a certain angle or shape.

5. The forging process of twisting one part of the blank to rotate a certain angle relative to another part.

6. The forging process of cutting and dividing the blank or removing the head.

(2) Die forging: The full name of die forging is die forging. The heated blank is placed in a forging die fixed on the die forging equipment and is forged into shape.

1. The basic process of die forging: blanking, heating, pre-forging, final forging, skin punching, trimming, tempering, and shot blasting. Commonly used processes include upsetting, lengthening, bending, punching, and forming.

2. Commonly used die forging equipment Commonly used die forging equipment include die forging hammers, hot die forging presses, flat forging machines friction presses, etc. In layman's terms, forged flanges have better quality and are generally produced by die forging. They have a fine crystal structure and high strength, but of course, they are more expensive.

Whether it is cast flange or forged flange, they are common flange manufacturing methods. Depending on the strength requirements of the components to be used, if the requirements are not high, you can also choose to use a turning flange.

(3) Cutting the flange: directly cut the inner and outer diameter and thickness discs of the flange on the middle plate, and then process the bolt holes and water lines. The flange produced in this way is called a cut flange, and the maximum diameter of this type of flange is limited to the width of the middle plate.

(4) Rolled flange: The process of cutting a medium plate and rolling it into a circle is called rolling, and is mostly used in the production of some large flanges. After successful rolling, it is welded, then flattened, and then the waterline and bolt holes are processed.

Hunan Great Steel Pipe Co.,Ltd
Hunan Great Steel Pipe Co.,Ltd is a world-class production and service provider of submerged arc straight seam welded pipe as the first subsidiary of Shinestar Group. Hunan Great Steel Pipe Co.,Ltd pays more attention to in the pipeline engineering research areas as a pioneer of China Petroleum Pipeline & Gas Pipeline Science Research Institute.



 Tel: +86-0731-88672086 
 Address: Hunan Steel Industrial Zone,No.9 Xiangfu Road, Yuhua District, Changsha,    Hunan, China
Copyright © Hunan Great Steel Pipe Co.,Ltd. All Rights Reserved. Sitemap