Angle iron manufacturing process is relatively simple, the production process can be divided into hot rolling and cold bending two, hot rolling for large Angle steel, cold bending is generally relatively small. The standard process is to use billet (such as billet) to gradually roll into ∨ shape after repeated rolling through a special section steel mill. The material is guaranteed, there is a transitional arc in the inside of the corner, and the mechanical properties are reliable. The small workshop is produced by direct rolling (bending) of sheet or strip steel, the inner side of the Angle has no transition arc, and because it is bent into the internal stress at the Angle is large, the mechanical properties are poor, the most important point is that the material is not guaranteed, and even may be 'strip steel', such Angle steel can not be bent, can not weld, can take the length of drilling at most.

Hainan Angle steel, commonly known as Angle iron, is a long steel bar with vertical angles on both sides. There are equal angles and unequal angles. The two sides of an equilateral Angle are equal in width=100%. Its specifications are expressed in millimeters of side width=100% × side width=100% × side thickness. Such as ' ∠30×30×3 ' , that is, the side width=100% of 30 mm, the side thickness of 3 mm equal Angle steel. It can also be represented by the model, which is the number of centimeters of the width=100% of the side, such as ∠3#. The model does not indicate the dimensions of different side thicknesses in the same model, so the side width=100% and side thickness dimensions of the Angle steel are complete in the contract and other documents, so as to avoid being represented by the model alone. Hot rolled equal-edge Angle steel specifications are 2#-20#. Angle steel can be composed of different stress components according to the different needs of the structure, and can also be used as a connection between the components. It is widely used in various building structures and engineering structures, such as beams, Bridges, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.
Metal forming machines include hydraulic presses, mechanical presses, forging and punching machines, bending, folding, straightening and leveling machines, cutting machines, punching machines and other metal forming machines. Due to historical reasons, most domestic metal forming machine tool enterprises mainly consume two kinds of products. The modernization level and scale of the machine tool industry is an important symbol of the country's industrial development, the traditional manufacturing power of the machine tool industry is mainly Germany, Japan, the United States, Italy and other industrialized developed countries. The product structure is novel and easy to operate. The machine has the characteristics of power saving, large power, small size, light weight, compact mechanism, flexible operation, multi-function operation, easy use and maintenance.