Stainless steel grating, as a metal component with both strength and corrosion resistance, is widely used in municipal engineering, sewage treatment, industrial platforms and other scenarios. Its production process integrates material science and precision machining technology, requiring multiple strict processes to ensure the stable performance of the final product.
The selection of raw materials is the primary step in production. Stainless steel grilles are usually made of specific types of stainless steel plates or round steel, which have a high chromium content and can form a dense oxide film on the surface, effectively resisting corrosion. Before production, it is necessary to conduct composition testing on raw materials and confirm whether the content of key elements such as chromium and nickel meets the standard through a spectral analyzer, in order to avoid affecting the product life due to impure materials.
The cutting and cutting process determines the basic dimensional accuracy of the grille. Modern factories often use CNC plasma cutting or laser cutting technology to cut stainless steel plates into preset specifications of flat steel or horizontal bars. The numerical control system can ensure that the cutting error is controlled within a very small range, ensuring the matching degree of each component during subsequent assembly. For irregular grilles, it is necessary to use wire cutting equipment to process complex contours and meet special engineering requirements.
Welding forming is the core of the process. The current mainstream process is argon arc welding, which avoids weld oxidation through inert gas protection. Welders need to place flat steel and horizontal bars in a grid structure according to the design drawings, and the welding points should be evenly distributed. The high-end production line has introduced a robot welding system, which enables the robotic arm to quickly complete welding with consistent weld depth, significantly improving structural stability.
The surface treatment process directly affects the weather resistance of the product. After welding, the grille needs to undergo acid pickling and passivation treatment to remove surface oxide scale and welding slag, and then rinse with clean water until neutral. For scenes with decorative needs, mirror polishing or sandblasting can also be performed to achieve a lower level of surface roughness. Grilles used in some special environments will be additionally coated with fluorocarbon coating to further enhance their corrosion resistance.
Finally, there is quality inspection and customized processing. The finished product needs to pass a load-bearing test and maintain no deformation for a period of time beyond the design load. The size inspection adopts a three-dimensional coordinate measuring instrument to ensure that parameters such as grid spacing and diagonal deviation comply with industry standards. In response to customers’ special requirements, factories can customize by adjusting welding density, changing grid thickness, etc. For example, grids produced for chemical plants will increase the density of horizontal bars to improve impact resistance.
From raw material screening to finished product delivery, the production process of stainless steel grating always revolves around the two core values of “precision” and “durability”. Strict control of each process is necessary to ensure that this metal component can function stably in complex environments for a long time.