How to make flanges

The production process is mainly divided into four types: forging, casting, cutting and rolling.

1. Cast flange and forged flange

Casting flange processing:

Put the selected raw materials into the medium-frequency electric furnace to melt the molten steel to reach 1600-1700 ℃; preheat the metal mold to 800-900 ℃ to maintain constant temperature; start the centrifuge and inject the molten steel into the preheated metal mold; the casting is naturally cooled Keep it at 800-900 ℃ for 1-10 minutes; cool it to near normal temperature with water, remove the castings from the mold.

Production process of forged flange:

The forging process is generally composed of the following procedures, namely, selecting high-quality steel billet blanking, heating, forming, and cooling after forging. The forging process methods include free forging, die forging and tire forging. During production, different forging methods are selected according to the quality of forgings and the number of production batches.

The die forgings have high dimensional accuracy, small machining allowance, and the fiber structure distribution of forgings is more reasonable, which can further improve the service life of parts.

The basic process of free forging: During free forging, the shape of the forging is gradually forged by some basic deformation processes. The basic processes of free forging are upsetting, lengthening, punching, bending and cutting.

2. Die forging

Die forging is called model forging, and the heated billet is placed in a forging die fixed on the die forging equipment and forged.

The basic process of die forging The process of die forging: blanking, heating, pre-forging, final forging, blanking, trimming, tempering, shot peening Commonly used processes are upsetting, long drawing, bending, punching and forming.

3. Cut flange

On the middle plate, directly cut out the disc with the inner and outer diameters and thickness of the flange, and then process the bolt hole and water line. The flange produced in this way is called a cut flange. The maximum diameter of such flanges is limited to the width of the middle plate.

4. Rolled flange

The process of cutting the sliver with the middle plate and then rolling it into a circle is called rolling. It uses e799bee5baa6e79fa5e98193e59b9ee7ad9431333431356633 to produce some large flanges. After the coiling is successful, welding is carried out, then flattened, and then the water line and bolt hole process are processed.