The flange is in fact a kind of joint, because through the flange, we can be in some turns or some more unique position are able to realize the pipeline to continue to connect. Therefore, in addition to the flange is a joint, it also has a certain degree of rigidity, can ensure the safety of things inside the pipeline. And elbow flange can be said to be the most important as well as the most basic type of a flange, then the next small make up to introduce you to the elbow flange in the end what is, as well as about the elbow flange of some of the situation it.
Elbow flange
Elbow flange is mostly used for flange connection or flange joints, refers to the flange, gaskets and bolts connected to each other as a group of combinations of sealing structure of the detachable connection, pipeline flange refers to pipeline installations in the pipeline flange, used in the equipment refers to the equipment of the import and export flange.
Production process
The production process is mainly divided into forging, casting, cutting, rolling the four.
Casting flange and forging flange
Casting out of the flange, the blank shape and size is accurate, small amount of processing, low cost, but there are casting defects (porosity. Cracks. Inclusions); casting internal organization streamline poor (if cutting parts, streamline worse);
Forging flange is generally lower than the casting flange carbon content is not easy to rust, forging streamline good, the organization is more dense, the mechanical properties are better than the casting of flange;
Forging process will also be improperly large or uneven grain, hardening and cracking phenomenon, the forging cost is higher than the casting of flanges.
Forging can withstand higher shear force and tensile force than casting.
The advantage of casting is that you can get a more complex shape, the cost is relatively low;
The advantage of forging is that the internal organization is uniform, there is no casting of porosity, inclusions and other harmful defects;
From the production process to distinguish between casting flanges and forging flanges, such as centrifugal flanges belongs to a kind of casting flanges.
Centrifugal flange belongs to the precision casting method of production flange, this kind of casting than ordinary sand casting organization to be much finer, the quality of a lot of improvement, not easy to appear organization loose, porosity, trachoma and other problems.
First of all, we need to understand how the centrifugal flange is produced, centrifugal casting to make flat welding flange process methods and products, which is characterized by the product after the following process steps:
①Selected raw material steel into the intermediate frequency furnace melting, so that the temperature of steel to 1600-1700 ° C;
②Pre-heating of the metal mold to 800
②Preheat the metal mold to 800-900℃ and keep it at constant temperature;
③Start the centrifuge and inject the steel in step ① into the preheated metal mold in step ②;
④Castings naturally cooled down to 800-900℃ and keep it at constant temperature for 1-10 minutes;
⑤Cool down the casting to close to the room temperature with water and take out the casting from the mold.
Flange production process:
Forging process generally consists of the following procedures, namely, selecting high-quality billets for discharging, heating, forming, and cooling after forging. The process methods of forging are free forging, die forging and tire film forging. Production, according to the size of the quality of forgings, the number of production batches to choose a different forging method.
Free forging productivity is low, large machining allowance, but the tool is simple, versatile, so it is widely used in forging the shape of a simple single piece, small batch production of forgings. Free forging equipment has air hammer, steam - air hammer and hydraulic press, etc., respectively, suitable for small, medium and large forgings production. Die forging productivity is high, simple operation, easy to realize mechanization and automation. Die forging high dimensional accuracy, small machining allowance, forging fiber tissue distribution is more reasonable, can further improve the service life of parts.
One of the basic processes of free forging: free forging, the shape of the forging is through some basic deformation process will be gradually forged into the billet. The basic processes of free forging are upsetting, drawing, punching, bending and cutting.
1. Upsetting? Upsetting is the original billet along the axial forging, so that its height is reduced, the cross-section of the operation process. This process is commonly used in forging gear blanks and other disk-shaped forgings. Upsetting is divided into all upsetting and local forging two kinds of coarse.
2. Drawing is to make the length of the billet increases, the cross-section of the forging process, usually used to produce shaft parts blanks, such as lathe spindle, connecting rod and so on.
3. Punching? With a punch in the blank punched out through holes or not through holes in the forging process.
4. bending? Bending the billet into a certain angle or shape of the forging process.
5. twist? The forging process that rotates one part of the billet at a certain angle relative to another part.
6. cutting? Split the billet or remove the head of the forging process.
Two, die forging
Die forging is known as the model forging, the heated billet will be placed in the forging equipment fixed in the die forging mold forging.
1. die forging basic process? Die forging process: material, heating, pre-forging, final forging, punching even skin, cutting, tempering, shot blasting. Commonly used processes are upsetting, pulling long, bending, punching, molding.
2. Commonly used die forging equipment? Commonly used die forging equipment are die forging hammer, hot die forging press, flat forging machine and friction press.
Commonly speaking, forged flanges are of better quality, generally produced by die forging, with fine crystal organization and high strength, of course, the price is also more expensive.
Whether casting flange or forging flange belongs to the 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 the turning system flange.
Three, cut flange
In the center plate directly cut out the flange to leave the amount of processing of the inner and outer diameter and thickness of the disk, and then the bolt holes and waterline processing. The flanges produced in this way are called cut flanges, and the maximum diameter of such flanges is limited by the width of the center plate.
Four, rolled flange
Cutting strips with the plate and then rolled into a round process is called rolled, mostly used in the production of some large flange. After the success of the roll for welding, and then flatten, and then the water line and bolt hole process.
Elbow flange manufacturer
Hebei Hou Dong Piping Equipment Co.
Cangzhou Zhenao Pipeline Manufacturing Co.
Mengcun Hui Zuzizhixian Weicheng flange fittings sales center
Dezhou Shengshi E-commerce Co.
Wenzhou Senfeng flange pipe fittings Co. Ltd.
Yanshan County Shunfeng Flange Factory
Summarize: In the above article, I introduced what is the elbow flange. Elbow flange in fact, as the above to introduce to you, is as a kind of joints and exists. In addition to give you an introduction to what is the elbow flange, I also gave you an introduction to the casting process of the elbow flange, so that you can better understand this kind of peculiar shape of things in the end how to manufacture out. Of course, for some manufacturers of elbow flange, I also gave you an introduction, so that you can go to better find the elbow flange they want.