Street Lamp poles are manufactured using a step-by-step process that shapes flat steel into the tall, hollow poles used for street lighting. The process involves several steps that prepare, form, and finish the metal.
1. Preparing the steel
The process begins with decoiling, whereby large steel coils are unwound and flattened. This is followed by edge trimming, which removes uneven or rough edges from the sides of the metal sheets. Next, the sheets are levelled to remove any bends or curves caused during storage or handling.
2. Cutting and shaping
After the steel has been levelled, it is sheared and cut into specific lengths depending on the type of pole being made. The sheets are then stacked for the next stage. After stacking, they go through bending, whereby the metal is curved into a semi-circular shape using specialist machines. The bent metal sheets are prepared to be joined and turned into the final pole shape.
3. Welding and reinforcement
The bent sheets are welded along the seam to form a cylindrical or polygonal pole. This weld is continuous and must be strong enough to support the structure. Next, the poles are passed through a straightening machine to ensure the final product is aligned in the right way. After straightening, the welds may undergo inspection using non-destructive testing methods to check for cracks or weak spots without damaging the pole.
4. Flange welding and openings
A flange plate is welded at the base of the pole, which allows the pole to be mounted securely to its foundation. Openings or holes for cable access and mounting fixtures are added using electric machines, such as Roscamat tapping machines from companies such as //www.cotswold-machinery-sales.co.uk/roscamat-tapping-machines/, which help create precise threads and holes in the metal. In some designs, internal reinforcement such as welded brackets may be added during or after welding.
5. Final treatments
The last stage includes cleaning and applying a special anti-rust coating. This step protects the pole from weather damage and increases its lifespan. Depending on the design, the pole may also be painted or galvanised to improve its durability.
