Square steel pipe is a common steel pipe product widely used in construction, machinery, automobile, aerospace, and other fields. Its manufacturing process mainly includes raw material preparation, steel pipe rolling, welding, straightening, cutting, surface treatment, and other links.

First of all, raw material preparation is the first step in the manufacture of square steel pipes. Generally, hot-rolled coils or cold-rolled coils are used as raw materials, and their thickness, width, and length are selected and cut according to different specifications.

Hot rolling is one of the core links in the manufacture of square steel pipes. In the hot rolling process, the raw materials go through multiple processes such as preheating, rough rolling, intermediate rolling, and finishing rolling, and finally form a square tube mother plate with a certain size and shape. After cooling, cutting, and other processes, these motherboards can enter the next step of cold drawing.

Cold drawing is one of the important links in the manufacture of square steel pipes. During the cold drawing process, the square tube mother plate goes through multiple cold drawing processes and gradually becomes a square tube with higher precision and a smoother surface. Lubricants and coolants are required during the cold drawing process to ensure the quality and surface finish of the square tube.

Welding is another important link in the manufacture of square steel pipes. In the welding process, the square tube mother plate undergoes cutting, butt jointing, welding, and other processes, and finally forms a square tube with a certain length and size. During the welding process, equipment and materials such as welding arc and welding materials are needed to ensure the welding quality and welding strength.

Straightening is one of the follow-up links in the manufacture of square steel pipes. During the straightening process, the square tube goes through multiple straightening processes and gradually becomes a straighter shape with higher precision. In the straightening process, straightening machines, straightening wheels and other equipment are needed to ensure the quality and shape accuracy of the square tube.

Finally, the square steel pipe needs to be cut and surface treated. Cutting can be cut to length or cut to length according to customer needs. Surface treatment includes pickling, painting, galvanizing, etc. to improve the corrosion resistance and aesthetics of the square tube.

In short, the manufacturing process of square steel pipes needs to go through multiple links of fine processing and processing to ensure the stability and reliability of its quality and performance. With the continuous advancement of science and technology and the continuous innovation of technology, the manufacturing technology of square pipes is also constantly improving and perfecting, providing more high-quality steel pipe products for all walks of life.

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