The manufacture of transformer tanks is a highly specialized process that requires ensuring their sealing, strength, and heat dissipation performance. This is primarily achieved through key steps such as material selection, cutting, assembly and welding, anti-corrosion treatment, and rigorous testing.
1. Material Selection
Tanks are typically made of low-carbon steel plates or high-strength steel plates to ensure structural strength and load-bearing capacity. For applications with special anti-corrosion requirements, stainless steel plates can also be used. Materials must possess good thermal conductivity, corrosion resistance, and weldability, and undergo quality inspection before use.
2. Cutting and Forming
According to the design drawings, steel plates are cut into the required shapes and sizes using a shearing machine or cutting machine. For corrugated or folded-plate (corrugated) tanks, a special forming line is used to press out corrugations or fold out grooves to increase the heat dissipation area and compensate for the thermal expansion and contraction of the oil.
3. Assembly and Welding
After assembling the cut steel plates, they are fixed using welding processes. Common welding methods include:
Gas shielded welding: Widely used in the manufacture of corrugated fuel tanks, improving weld quality;
Manual arc welding: Suitable for irregular parts;
Submerged arc welding: Suitable for long, straight welds, offering high efficiency and stable quality.
During welding, current, voltage, and speed must be controlled, and special materials should be preheated and post-heat treated to reduce stress deformation. Cross joints should be avoided, and the number of welds should be minimized to reduce the risk of leakage.
