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Pressing Elbow

Pressing Elbow

Stamping and welding elbow, it is to adopt the same material as the pipe material sheet metal with the stamping die half into a circular elbow.

  • Details

Stamping and welding elbow, it is to adopt the same material as the pipe material sheet metal with the stamping die half into a circular elbow, then two half - ring elbow group welding forming. Due to the different welding standards of various kinds of pipelines, fixed semi-finished products are usually delivered by group welding. The on-site construction is carried out according to the grade of pipeline weld.


A pipe fitting commonly used in pipe installation to connect two pipes of the same or different nominal sizes to make a certain Angle turn.


(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.

(2) Milling generally does not produce chippings and chips, the material consumption is less, and no other heating equipment is needed, so it is a kind of material saving, energy saving processing method, the cost of stamping parts is lower.

(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 stamping elbow is complicated, and it needs to be welded according to different materials and USES and gradually formed under certain pressure. The forming of stamping elbow needs to be carried out in accordance with certain procedures and the corresponding process is strictly followed. Otherwise, the produced stamping elbow will cause 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 of the elbow.

It is an ideal way to manufacture large - scale thrust elbow of any specification with the ratio of middle diameter to inner diameter of elbow greater than 1.5d.

This process forming method is used in the production of different elbow, which shows good use value in different fields, so that the process has good value in the production of different elbow.

The advantages of the forming process of large stamping elbow are mainly shown in the following aspects:

Peppermint does not require billet as raw material, saving the cost of tube making equipment and mold, and can get any large diameter with relatively thin wall. The raw material of this kind of stamping elbow is quite special. It does not need to add the raw material of tube billet.

2 processing stamping elbow billet for tablet or developable surface, thus cutting is simple, easy to guarantee accuracy, welding assembly is convenient, easy to control when processing raw material, the operation is simple, no complicated process, and welding and assembly is more convenient.

As a result of the above two reasons, can shorten the manufacturing cycle, production costs greatly reduced. Because no special equipment is needed, it is especially suitable for large stamping elbow on site.


The material of stamping elbow is carbon steel, stainless steel, alloy steel, etc. Carbon steel stamping elbow is cheap, large usage. The bending of alloy steel is used in special position.

Stainless Steel

The main difference between the stainless steel stamping elbow and the carbon steel elbow is the material. The chemical composition of the stainless steel stamping elbow will keep the surface of the elbow from rust and corrosion for a long time.

Stainless steel is characterized by rust - free, corrosion - resistant, chromium content of at least 10.5%, carbon content of less than 1.2% of steel.

Austenitic stainless steel matrix is mainly austenitic stainless steel with surface core cube structure, and it has no magnetism. It is mainly reinforced (and may lead to certain magnetism) through cold processing.

Austenitic - ferrite (two-phase) stainless steel

The matrix has both austenite and ferrite microstructure (the content of less phase is generally more than 15%), and has magnetic properties, which can be strengthened by cold processing of stainless steel.

Iron grain size stainless steel substrate with body centered cubic crystal structure of ferrite organization (alpha), magnetic, generally can't through heat treatment hardening, but cold working can make its mild stainless steel reinforcement.

Martensite stainless steel matrix is martensite stainless steel with magnetic properties which can be adjusted by heat treatment.

The matrix is austenite or martensite, and can be treated by precipitation hardening (also called aging hardening) to make it hard (strong) stainless steel.

The Material

Carbon steel: ASTM/ASME A234 WPB, WPC

Alloy: ASTM/ASME A234 WP 1-wp 12-wp 11-wp 22-wp 5-wp 91-wp 911, 15Mo3 15CrMoV, 35CrMoV

Stainless steel: ASTM/ASME A403 WP 304-304l -304H-304LN-304N

ASTM/ASME A403 WP 316-316 l - 316 - h - 316 ln - 316 - n - 316 ti

ASTM/ASME A403 WP 321-321h ASTM/ASME A403 WP 347H

Low temperature steel: ASTM/ASME A402 wpl3-wpl 6

High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon psychology, PVC, PPR, RFPP, etc.

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