(1) stamping processing of high productivity, and easy to operate, easy to realize mechanization and automation, this is because stamping is relying on the die and stamping equipment to complete the process, the number of strokes of ordinary presses up to dozens of times a minute, high-speed pressure to be up to hundreds or even thousands of times a minute or more, and each stamping stroke may be a stamping part. (2) stamping is generally no chips and debris generation, less material consumption, and do not need other heating equipment, so it is a material saving, energy-saving processing methods, stamping parts of the lower cost.
(3) stamping can be processed out of a larger size range, the shape of the more complex parts, such as small to the stopwatch, large to the longitudinal beam of the car, covering parts, etc., coupled with the cold deformation of the material hardening effect of stamping, stamping strength and stiffness are higher.
(4) stamping due to the mold to ensure that the size and shape of the stamped parts of the precision, and generally do not destroy the surface quality of the stamped parts, and mold life is generally longer, so the quality of the stamping is stable, interchangeable, with the "one and the same" characteristics.
The molding process of stamping elbow is complex, according to different materials and uses for welding, under a certain pressure for gradual molding. Stamping elbow molding needs to be carried out in accordance with certain procedures, strict compliance with the corresponding process process, otherwise the production of stamping elbow will produce quality problems. As required, a circular ring shell can be cut into four 90 ° elbow or six 60 ° elbow or other specifications of the elbow, the process is suitable for
Manufacturing elbow center diameter and elbow inner diameter ratio of any specifications of large-scale pushed elbow is greater than 1.5D, is the ideal method of manufacturing large pushed elbow.
This process molding method used in the production of different elbows in different areas to show good value of use, so that the process has a good value in different elbow production.
Large stamping elbow molding process advantages are mainly manifested in the following aspects: (1) do not need billets as raw materials, can save the cost of pipe making equipment and molds, and can be obtained any large diameter and relatively thin wall thickness of the pushed elbow. This stamping elbow raw material is more special, do not need to join the raw material of the billet, easy to control during processing.
(2) processing of stamping elbow billet for the flat plate or spreadable surface, so the material is simple, precision is easy to ensure that the assembly and welding is convenient, easy to control the raw materials in the processing, the operation is relatively simple, there is no complicated process, and welding and assembly is more convenient.
(3) Because of the above two reasons, can shorten the manufacturing cycle, the production cost is greatly reduced. Because it does not require any special equipment, especially suitable for on-site processing of large stamping elbow. Stamping elbow materials are carbon steel, stainless steel, alloy steel and other materials. Stamping elbow of carbon steel is cheap and used in large quantities. And alloy steel elbow is used in special positions.
Stainless steel
Stainless steel stamping elbow is different from carbon steel elbow is mainly the difference in material, the chemical composition contained in the elbow will keep the surface of the elbow for a long time will not rust, not easy to be corroded.
Stainless steel to stainless steel, corrosion resistance as the main characteristics, and chromium content of at least 10.5%, the maximum carbon content of not more than 1.2% of the steel.
Austenitic stainless steel matrix to face-centered cubic structure of austenitic organization (γ-phase) is dominated by non-magnetic, mainly through cold working to make it strengthened (and may lead to a certain magnetic) stainless steel.
Austenitic - ferrite (duplex) type stainless steel
The matrix has both austenitic and ferrite two-phase organization (of which the lesser phase content is generally greater than 15%), magnetic, can be strengthened by cold working stainless steel.
Ferrite-type stainless steel matrix to body-centered cubic crystal structure of ferrite organization (α-phase) is dominant, magnetic, generally can not be hardened by heat treatment, but cold working can be slightly strengthened stainless steel.
Martensitic stainless steel matrix for the martensitic organization, magnetic, heat treatment can be adjusted through the mechanical properties of stainless steel.
Precipitation hardening stainless steel
The matrix is austenitic or martensitic organization, and can be precipitation hardening (also known as age hardening) treatment to make it hard (strong) stainless steel. Because the stamping elbow has good comprehensive performance, so it is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding and other basic engineering.