Cast out of the flange, rough shape and size accurately, processing capacity and low cost, but casting defects (pores. Crack. Inclusions); streamlined internal organization of poor casting (if it is cutting parts, streamlined worse);

Cast flange forged flange carbon content generally lower than the rust, forging good streamlined, organizations are more compact, mechanical properties than cast flange;

Die forging process properly there will be large or uneven, the phenomenon of hardening cracks, forging casting cost higher than the flange.

Forgings, castings can withstand higher than the shear force and tensile strength. The advantage of casting can come up with more complex shape, the cost is relatively low;

The advantages of internal organization of the uniform forging, casting does not exist in the pores, inclusions and other harmful defects;

Different from the production process and forging flange cast flange different, such as centrifugal casting flange on the part of a flange.

Centrifugal casting method of production of the flange is the flange, the more common types of casting sand casting organizations to small lot, improve the quality of a lot less prone to loose tissue, porosity, trachoma and other issues.

First, we need to understand how the production of centrifugal flange produced, centrifugal casting making flat welding flange process method and product that is characterized by the product processed through the following process steps:

① the selected raw materials into intermediate frequency electric furnace steel smelting, the steel temperature reaches 1600-1700 ℃;

② the metal mold pre-heated to 800-900 ℃ constant temperature;

③ start centrifuge, will step into the steel steps ①, ② the preheated metal mold;

④ casting cooled to 800-900 ℃ remain 1-10 minutes;

Water cooled to near room temperature ⑤, stripping out the casting.

We come to understand the production process forged flange:

Forging process generally consists of the following processes, namely, the select high-quality billet cutting, heating, forming, forging, after cooling. Forging process methods are free forging, die forging and forging membranes. Production, according to the size of forging quality, production batch number to select a different forging methods.

Free forging production is low, a large allowance, but the tool is simple, versatile big, it is widely used in forging shape than the simple one-piece, small batch production of forgings. Free air hammer forging equipment, steam - air hammer and hydraulic machines, respectively, for small, medium and large forgings production. Forging high productivity, simple operation, easily mechanized and automated. Forging high dimensional accuracy, machining allowance is small, forging a more reasonable distribution of fibrous tissue, can further improve the service life of parts.

A free basic forging processes: free forging, the forging of some of the basic shape of the deformation process is gradually forging into the blank. Free basic processes are forging upsetting, stretching, punching, bending and cutting and so on.

1 upsetting upsetting to the original axial forging billets, their height is reduced, increasing cross-section operation. This process commonly used in forging gear blanks and other disc-shaped forging. Upsetting upsetting be divided into full and partial upsetting two.

(2) stretching stretching is to increase the length of billets, forging cross-section decreasing process, usually used to produce rough shaft parts, such as the lathe spindle, rod and so on.

3 punching in the blank with a punch hole or barrier on the hole out of the forging process.

4. Bending of the billet angled or curved shape of the forging process.

5 reverse the blank part of the rotation angle relative to the other part of the forging process.

6 split billets or the removal of material cutting head forging process.

Second, all known models forging forging forging, billets will be placed in the heating of the device fixed in forging forging forging mold forming.

1 The basic process forging die forging process: cutting, heating, pre-forging, final forging, red skin, cutting, conditioning, shot peening. Common processes are upsetting, stretching, bending, punching, forming.

2 used forging equipment Forging equipment commonly used in forging hammers, hot forging presses, friction presses flat forging machine and so on.

More simply, better quality forged flanges, generally produced by forging, fine crystal structure, high strength, of course, prices are expensive.

Whether casting or forging flange flange flange are all common manufacturing methods, see the need to use the components of the strength requirements, if less demanding, you can also use the system turning flange.

Third, cut Flanges

Board cut out in the direct processing capacity left flange outside diameter and thickness of the inner disk, and then bolt holes and water line processing. So produced is called the cut flange Flanges, such flange diameter to the width of the plate is limited.

Fourth, the roll flange

Plate with a cut in strips and then roll made of a round is called the rolling process, used for the production of large flange. After the success of the welding roll, then flatten, then the waterline and the bolt hole processing technology.