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Stamping elbow
Stamping elbow

    Stamping elbow

    The punching elbow is a commonly used pipe fitting in pipeline installation, connecting two common nominal sizes to the same or different pipes to make the pipe bend at a certain Angle...



The punching elbow is a commonly used pipe fitting in pipeline installation, connecting two common nominal sizes to the same or different pipes to make the pipe bend at a certain Angle.

The punching elbow is used to press the sheet metal of the same material with the pipe material into half a circular bend, and then the two half ring corners are formed for welding. Due to the different welding standards of various pipes, it is usually done by the group to fix the semi-finished product of the spot welding, and the site construction is welded according to the weld grade of the pipeline. Therefore, it is also known as the two-part welding elbow.

The advantages of punch bend

(1) high efficiency of stamping processing, and easy to operate, easy to realize mechanization and automation, this is because the stamping is rely on die and stamping equipment to complete the processing, ordinary press stroke times per minute can reach dozens of times, high pressure to can reach more than hundreds of times or even one thousand times per minute, and every time stamping stroke can get one stamping parts.

The stamping is usually produced without cutting debris, the materials are consumed less, and other heating equipment is not needed. Therefore, it is a kind of province material, energy-saving processing method, and the cost of stamping parts is low.

(3) stamping can processing the size range is larger, more complex shape parts, such as small to watch the stopwatch, big to auto longeron, etc., covering parts and stamping material hardening effect of cold deformation, the strength and stiffness of stamping was high.

(4) when pressing due to the size and shape of mold to ensure the stamping precision, and generally does not destroy the surface of the stamping parts quality, and the life of the mould are long, so the stamping quality is stable, good compatibility, has the characteristics of "the same".

The forming process of the punching bend is complicated. It needs to be welded according to different materials and USES, and it is gradually formed under certain pressure. The forming of the punching bend needs to be carried out according to certain procedures, and the corresponding process process is strictly followed. Otherwise, the production of the stamping elbow will produce quality problems. According to the need of a circular ring shell can be cut into four 90 ° bend or six 60 ° elbow or other specifications elbow, diameter and in the process is suitable for manufacturing elbow bend diameter ratio greater than 1.5 D any specifications of large elbow push system, is an ideal method to manufacture large elbow push system.

It is easy to crack when the stamping elbow is hard to crack, and different welding rods are used to weld in welding to ensure the quality of the stamping bend. If using the same type of chromium stamping elbow electrode welding, must be above 300 ℃ preheat and 700 ℃ or so slow cooling after welding. If the welding parts cannot be done after welding, chrome nickel stamping bend should be used. Different kinds of welding rods have different properties and characteristics in use, and they are selected according to the corresponding needs in use to ensure the quality of the stamping elbow.

In order to improve the corrosion resistance and welding property of the punching, the appropriate amount of stable element Ti, Nb, Mo and so on are added in the production, and the welding is better than the chrome punching elbow. Using the same type of chromium stainless steel stamping elbow, should be above 200 ℃ preheat and around 800 ℃ tempering treatment after welding. If the welding parts cannot be treated, chromel stainless steel stamping elbow should be used.

The punching bend has good corrosion resistance and oxidation resistance, and good features are used and popularized in different fields. It is widely used in chemical, fertilizer, petroleum and medical machinery manufacturing.

The stamping bend has certain corrosion resistance (oxidation acid, organic acid, cavitation), heat resistance and wear resistance. Usually used for power plant, chemical, petroleum and other equipment materials. It is necessary to pay attention to welding process, heat treatment condition and selection of suitable electrode. 5. The stamping elbow has titanium calcium and low hydrogen type. The titanium calcium can be used for ac dc, but the penetration is shallow and red at the same time. Therefore, it is possible to use dc power supply as far as possible.

Stamping elbow should be kept dry, when using titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should be 1 hour after the 200-250 ℃ drying (can't repeat drying, otherwise coated easy cracking flake), prevent stainless steel stamping elbow coated sticky oil and other dirt, lest cause stainless steel stamping elbow weld increased carbon content and affect the quality of weldment.

During welding, stamping elbow after heating can release carbide, carbide precipitation by repeated heating, release of carbide will affect the performance of the stamping elbow, lower corrosion resistance and mechanical properties. The above is about the matter that needs to be paid attention to when using the stamping elbow, it needs to be used according to certain methods and matters, so as to ensure its good use value and performance.



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