The C-shaped steel is automatically formed by the C-shaped steel forming machine. The C-shaped steel forming machine can automatically complete the forming process of the C-shaped steel according to the given C-shaped steel size.

Types of C-beams:

Wholesale steel c profile is divided into galvanized C-shaped steel, hot-dip galvanized cable tray C-shaped steel, glass slot C-shaped steel, glass curtain wall C-shaped steel, cable trough C-shaped steel, reinforced C-shaped steel, double-hold C-shaped steel, unilateral C-shaped steel, manual Forklift C-shaped steel, unequal-sided C-shaped steel, straight-sided C-shaped steel, hypotenuse C-shaped steel.

C-shaped steel is widely used in purlins, wall beams, etc. of steel structure houses, and can also be assembled into light roof trusses, brackets, etc. In addition, it can also be applied to columns, beams, arms, etc. in machinery and light industry.

Extension: In order to ensure the quality and safety of the use of C-shaped steel, we recommend that you choose products from well-known brands to ensure product quality and after-sales service without any problems, and the service life is relatively long, even if If you encounter problems in the future, you can also replace it at any time.

C-shaped steel, because its cross-sectional shape is like the English letter C, and it belongs to the steel series, it is referred to as C-shaped steel, and its full scientific name is inner curling channel steel (because the channel steel appeared early, and the main body of this structure still conforms to the channel steel. Therefore, this kind of channel steel that looks like channel steel is called ××× channel steel, such as a few-shaped steel, which is called outer curling channel steel).

The specific appearance time of this type of profile has not been found, but since the processing technology of C-section steel belongs to the continuous roll-type cold bending forming technology (different from casting, continuous casting, welding, bending, extrusion, stretching, etc.), Therefore, its production must be after this technology.

Development history of steel structure and cold forming

foreign

In 1838, Russia, the United States, the United Kingdom and other countries successively used presses or cold drawing machines to produce single-piece cold-formed steel.

Before the 1850s, the structure was mainly cast iron. Typical building: 1851 Crystal Palace at the First World Expo in London, England (4500 tons of cast iron, 10 tons of glass, destroyed by fire in 1936)

In 1855, a thin-walled U-shaped steel made by a bending press appeared in the New York building office building, riveted into an I-beam.

In 1870, section steel began to be gradually used, and cast iron was transformed into steel structure. Typical building: Eiffel Tower at the 1889 Paris World Expo (320 meters high, 10,000 tons of steel components, 148 years ago)

In 1910, the United States invented the continuous roll-type cold-formed forming process and built the world's first roll-type cold-formed steel unit. The world has since entered the stage of industrialized production of cold-formed steel. (CZ section steel, color steel tile, floor deck, highway guardrail... all belong to this kind of craft products in the steel structure)

In 1925, the United Kingdom, Germany, and France successively built roll-type cold forming units.

In 1946, the American Iron and Steel Institute (AISI) announced the world's first design specification for cold-formed thin-walled steel structures ("SpeCIFication for the Design of Light-Gauge Steel Structural Members" 1946 EDItion, AISI), the first in theoretical technology. The breakthrough in the system has laid the foundation for the development of the world's cold forming technology.

In 1959, the Soviet Union built the first roll-type cold forming production line.

domestic

In the late 1950s and early 1960s, the roll-type cold bending forming unit was built;

In 1987, the national standard "Technical Specifications for Cold-Formed Thin-Wall Steel Structures" (GBJ18-87) was officially published;

After the 1980s, with the continuous advancement of the national reform and development strategy, the cold forming technology, equipment and products have gradually developed;

In 2002, the second edition of the national standard "Technical Specification for Cold-Formed Thin-Wall Steel Structures" (GB50018-2002) was issued;

After 2008, under the large-scale economic stimulus of the country, the development of the industry has reached an unprecedented height;

Since the state proposed and gradually promoted the supply-side reform in 2015, the growth of the industry has slowed down.

2. Introduction to strip processing

The main process of hot-rolled strip steel: heating furnace - dephosphorization machine - rough rolling mill - dephosphorization machine - finishing mill - surface quality tester - layer cooling - coiler - baler - spray Number machine - roll warehouse slab