The forming process of square pipes usually includes the following steps:
Uncoiling of strip
Square pipes are usually formed from strip steel of a certain width after being uncoiled by uncoiling equipment. The uncoiler uncoils the roll-formed strip material from the steel coil and prepares it for further operations.
Roll forming
The unfolded strip passes through the forming roller machine and is rolled by multiple rollers to roll the strip material into a square shape. Forming roller machines usually have multiple stations, and each station uses different rollers to change the shape and size of the strip, ultimately forming a square shape section.
Welding
The formed strip steel is welded through welding equipment, generally using high-frequency welding or resistance welding. High-frequency welding is placing square steel strips in an induction coil, heating them to the melting point, and then pressing them together to completely fuse the edges of the two strips. Resistance welding is to pass the strip through the electrode clamp, and then add enough current to generate high temperature at the edge of the strip to form a weld.
Straightening, cutting, and coating
Straighten the welded square pipe so that its size and shape meet the requirements. It is then cut and coated to make the square pipe the length and surface treatment required by the customer. Cutting is generally done by sawing or wire-cutting machines, and coating is usually done by hot-dip galvanizing or spraying.

Square pipes are square and rectangular pipes. They are rolled from strip steel after processing. To make ordinary steel into square pipes, a special forming process is required.
The raw material of square pipes is steel plate or steel strip. These raw materials need to be processed by cutting, flat trimming, and other processes to ensure that their size and surface quality meet the requirements. The processed raw materials are then fed into the molding machine for molding. The forming machine is a piece of equipment specially used for pipe forming. It is mainly composed of rollers, transmission systems, support frames, etc. Under the action of the forming machine, the raw material is gradually bent into a pipe with a square cross-section. The number and arrangement of rollers in the forming machine are different, and square pipes of different specifications and shapes can be produced.
After forming, the square pipe needs to be welded. Welding is a process of joining two or more metal materials together through heat or pressure processing. There are many ways to weld square pipes, the common ones are resistance welding, gas-shielded welding, laser welding, etc. After welding is completed, the square pipe needs surface treatment to improve its surface quality and corrosion resistance. Surface treatment methods include galvanizing, spraying, sandblasting, etc.
Square pipes require cutting, drilling, bending, and other processing techniques to meet different usage needs. These processing techniques require the use of specialized equipment and tools, such as cutting machines, drilling machines, bending machines, etc.
The forming process of square pipes is a complex process that requires multiple stages of processing and processing. Only through scientific technological processes and precise operations can square pipes with excellent quality and stable performance be produced.

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