Production technology and manufacturer of elbow flange

Flange is actually a kind of joint, because through flange, we can realize continuous communication of pipes at some turning places or some unique positions. Therefore, the flange is not only a joint, but also has certain rigidity, which can ensure the safety of things inside the pipeline. Elbow flange is the most important and basic flange type. Then Bian Xiao will introduce you to what elbow flange is and some information about it.

elbow flange

Elbow flange is mostly used for flange connection or flange joint, which refers to a detachable connection with flanges, gaskets and bolts connected to each other as a set of combined sealing structure. Pipeline flange refers to the flange of pipeline used in pipeline device, and refers to the import and export flange of equipment when it is used on equipment.

manufacturing technique

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

Cast flanges and forged flanges

The shape and size of the casting flange blank are accurate, the machining amount is small and the cost is low, but there are casting defects (porosity, cracks and inclusions). Poor streamline of internal structure of casting (even worse if it is a cutting piece);

Forged flanges are generally lower in carbon content than cast flanges, less prone to rust, better streamlined forgings, denser structures and better mechanical properties than cast flanges.

Improper forging process will also lead to coarse or uneven grains and hardening cracks, and the forging cost is higher than that of casting flange.

Forgings can withstand higher shear force and tension than castings.

The advantage of casting is that it can make more complex shapes and the cost is lower;

The advantage of forging is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in the casting;

The difference between cast flange and forged flange lies in the production process. For example, centrifugal flange is one of the cast flanges.

Centrifugal flange is a kind of flange produced by precision casting. Compared with ordinary sand casting, the structure of this kind of casting is much finer, and the quality is also improved, and it is not easy to have problems such as loose structure, porosity and trachoma.

First of all, we need to know how the centrifugal flange is produced, the process method and products of centrifugal casting to make flat welded flange, which are characterized in that the products are processed according to the following process steps:

(1) Put the selected raw steel into an intermediate frequency electric furnace for smelting, so that the temperature of molten steel reaches1600-1700℃;

(2) preheating the metal mold to 800-900 DEG C and keeping the temperature constant;

(3) star that centrifuge to inject the molten steel in step (1) into the preheated metal mold in step (2);

(4) naturally cooling the casting to 800-900 DEG C for 1- 10 minute;

(5) cooling to near normal temperature with water, demoulding and taking out the casting.

Production technology of flange:

Forging process generally consists of the following procedures: selecting high-quality blank, heating, forming and cooling after forging. Forging technology includes free forging, die forging and tire film forging. In production, different forging methods are selected according to the quality of forgings and the number of production batches.

Free forging has low productivity and large machining allowance, but the tools are simple and universal, so it is widely used to forge forgings with simple shape and small batch production. Free forging equipment includes air hammer, steam-air hammer and hydraulic press, which are suitable for producing 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 allowance and more reasonable fiber structure distribution, which can further improve the service life of parts.

First, the basic process of free forging: In free forging, the shape of forgings is gradually forged through some basic deformation processes. The basic process of free forging includes upsetting, drawing, stamping, bending and cutting.

1. upset? Upsetting is the operation process of forging the original blank along the axial direction to reduce its height and increase its cross section. This process is often used to forge gear blanks and other disc forgings. Upsetting can be divided into whole upsetting and local upsetting.

2. Stretch? Drawing is a forging process, which increases the length of the blank and reduces the cross section. It is usually used to produce shaft blanks, such as lathe spindles and connecting rods.

3. punch in? Forging process of punching a through hole or a non-through hole on a blank with a punch.

4. bend over? Forging process of bending a blank into a certain angle or shape.

5. Twist? Forging process in which one part of a blank rotates at a certain angle relative to another part.

6. cutting? Forging process of dividing blank or cutting off material head.

Second, die forging

Die forging is called die forging, which is to put the heated blank into a forging die fixed on die forging equipment for forming.

1. What is the basic process of die forging? Die forging process: blanking, heating, pre-forging, final forging, skin punching, trimming, tempering and shot peening. Common processes include upsetting, drawing, bending, stamping and forming.

2. Common die forging equipment? Commonly used die forging equipment includes die forging hammer, hot die forging press, flat forging press and friction press.

Generally speaking, forged flanges are of good quality, generally produced by die forging, with fine crystal structure, high strength and, of course, high price.

Casting flange and forging flange are common flange manufacturing methods. According to the strength requirements of the parts used, if the requirements are not high, you can also choose to turn the flange.

Third, cut the flange.

Directly cut the disc with flange inside, outside and thickness on the middle plate, and then process the bolt hole and waterline. Flanges produced in this way are called cutting flanges, and the maximum diameter of such flanges is limited to the width of the middle plate.

Four, rolling flange

The process of cutting strips with medium plate and then rolling them into a circle is called rolling, which is mostly used in the production of some large flanges. After successful winding, weld, then flatten, and then process waterline and bolt hole.

Elbow flange manufacturer

Hebei houdong pipeline equipment co., ltd

Cangzhou Zhen' ao pipeline manufacturing co., ltd

Mengcunhuizu autonomous county Weicheng flange pipe fitting sales center

Dezhou Shi Sheng electronic commerce co., ltd

Wenzhou senfeng flange pipe fitting co., ltd

Yanshan county shunfeng flange factory

Summary: Bian Xiao introduced what elbow flange is. In fact, elbow flange exists as a kind of joint, which was introduced to you in the above article. Besides introducing what elbow flange is, Bian Xiao also introduced the casting technology of elbow flange, so that everyone can better understand how this strange-looking thing is made. Of course, for some elbow flange manufacturers, Bian Xiao also introduced them to you, so that you can better find the elbow flange you want.